Journal articles: 'Warp-knitted fabric'

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Chen, Qing, Xuhong Miao, Haiwen Mao, Pibo Ma, and Gaoming Jiang. "The Comfort Properties of Two Differential-Shrinkage Polyester Warp Knitted Fabrics." Autex Research Journal 16, no. 2 (June 1, 2016): 90–99. http://dx.doi.org/10.1515/aut-2015-0034.

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AbstractSingle-layered warp knitted fabrics were produced by the 60D/36F (containing 36 filaments) polyester yarn with differential shrinkage (DS) property in this study. Due to the differential shrinkage property, the fabric becomes curly and bulkier, simulating cotton fabric in terms of its appearance and fabric handle. The performance and appearance of these DS polyester warp knitted fabrics were evaluated objectively and subjectively. The testing results demonstrated that the DS polyester warp knitted fabric had better abrasion property, worse pilling resistance due to the mechanical property of polyester yarn when compared with 100% cotton warp knitted fabric. Meanwhile, lower water vapour permeability and air resistance were found for DS polyester warp knitted fabric resulting from the dense structure of yarn shrinkage after heat-moisture treatment. Besides, the fabric handle was evaluated by Kawabata evaluation system and subject to trial under dry and wet fabric condition. DS polyester warp knitted fabrics provide better recovery under low stress mechanical pressure. The subjective evaluation result shows that the warp knitted fabrics made of DS polyester had similar handle against cotton warp knitted fabric in terms of prickle, smooth, comfort and dry feeling in both dry and wet testing conditions.

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Xu, Hai-Yan, Jin-Hua Jiang, Nan-Liang Cheng, Fang-Bing Lin, and Hui-Qi Shao. "Finite Element Modeling for the Uni-Axial Tensile Behaviour of Metallic Warp-Knitted Fabric." Fibres and Textiles in Eastern Europe 26, no. 2(128) (April 30, 2018): 49–54. http://dx.doi.org/10.5604/01.3001.0011.5738.

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The finite element analysis method (FEM), for its advantages of lower time and economic costing in predicting the mechanical properties of fabrics, was applied to warp-knitted fabrics. In this paper, two bar warp-knitted fabric knitted with wires was used as reflecting mesh antennas. Firstly the loop unit of the metallic warp-knitted fabric was simulated in 3-D by TexGen software. Secondly the 3-D loop unit model was inputted into ABAQUS software to form a model of the metallic warp-knitted fabric sheet for uni-axial tension analysis. Thirdly numerical results were obtained after setting the parameters in ABAQUS. Finally numerical results were verified by uni-axial tensile experiments on the metallic warp-knitted fabric. The results showed that the simulation was in good agreement with the experimental tensile process, where the transfer of yarns between loops when in low fabric elongation and in yarn elongation when in high fabric elongation were simulated by FEM of warp-knitted fabric in the tensile process. Also the same trend of tensile force was found in experiment and FEM results. Therefore it can be concluded that FEM can be used to predict the mechanical properties of warp-knitted fabric with a complex structure.

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Yim, Ka-yan, and Chi-wai Kan. "A statistical analysis of low-stress mechanical properties of warp-knitted fabrics." Textile Research Journal 88, no. 4 (December 12, 2016): 467–79. http://dx.doi.org/10.1177/0040517516681963.

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Fabric hand is an indispensable characteristic for the selection of fabric and product development and the buying consideration for manufacturers and consumers. However, there is little comprehensive work on the hand feel property of warp-knitted fabrics due to the mainstream natural fibers (cotton, wool and silk) and other fabric structures (woven, weft-knitted and nonwoven). The increasing potential for the wide variety of applications and development of warp-knitted fabrics is not only because its fabric hand gives better determination for fabric marketing, but also because it provides extensive scope for fabric performance and appearance. This paper reports an experimental study on the integrated fabric hand behavior of a series of warp-knitted fabrics made for various apparel applications, such as sportswear, lingerie and leisure wear. These 105 fabrics were produced by varying different physical parameters, including fabric weight and fabric thickness. The Kawabata Evaluation System for Fabric (KES-F) was employed to obtain the fabric hand properties (primary hand value and total hand value) related with stiffness, smoothness and softness. All low-stress mechanical properties and fabric hand values from the testing results were used to verify the applicability of the KES-F on warp-knitted fabrics and to analyze the relationships of fabric parameters and hand characteristics. The results indicate that the KES-F is an appropriate tool to measure the hand attributes of warp-knitted samples, and moderate correlations between physical properties and mechanical behavior were found.

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Zhang, Yong Ge. "The Development of Low Gauge Pure Cotton Warp Knitted Fabric." Advanced Materials Research 1048 (October 2014): 113–15. http://dx.doi.org/10.4028/www.scientific.net/amr.1048.113.

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The majority of knitted pure cotton fabrics are weft knitted products, while warp knitted products are of few varieties. This paper mainly develops low gauge pure cotton warp knitted fabric using compact spinning and it obtains better result, increases the varieties of knitted pure cotton products.

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Zhu, Licheng, Maryam Naebe, Ian Blanchonette, and Xungai Wang. "Mechanical properties of bifacial fabrics." Textile Research Journal 88, no. 12 (March 28, 2017): 1335–44. http://dx.doi.org/10.1177/0040517517700193.

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This study focuses on the qualitative evaluation of the mechanical properties of bifacial fabrics, which have a knitted structure on one face and a woven structure on the other. Woven, knitted, and bifacial fabrics were produced on a purpose-built machine, using wool/acrylic and polyester yarns. The bifacial fabric was manufactured with the woven structure being a plain weave and the knitted structure being a single jersey. The results of load–extension test showed unique tensile behavior, with two breakages in both the warp and weft directions, representing the woven and knitted structures. The bending length of the bifacial fabric in the weft direction with its knitted face up was smaller than that in the warp direction, and the bending length in the warp direction with its knitted face up was similar to that in two directions with the woven face up. The bifacial fabric demonstrated unique abrasion resistance on two faces, combining the performance of the knitted and woven fabrics in abrasion resistance. The abrasion resistance on the woven face was better than that on the knitted face. The knitted face of the bifacial fabric generally pilled less than the knitted fabric after abrasion over a certain number of cycles.

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Yuping, Chang, Yanping Liu, Zhao Shuaiquan, and Hu Hong. "Design and manufacture of three-dimensional auxetic warp-knitted spacer fabrics based on re-entrant and rotating geometries." Textile Research Journal 92, no. 3-4 (August 11, 2021): 467–78. http://dx.doi.org/10.1177/00405175211037204.

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Warp knitting technology is a fabric-forming technologies that is very suitable to fabricate three-dimensional (3D) auxetic fabrics due to its high efficiency and powerful pattern designing possibilities. In this study, two typical auxetic geometries, namely the re-entrant hexagonal network and rotating square solids, were selected as the design prototypes for the design and manufacture of 3D warp-knitted spacer fabrics. While two 3D warp-knitted spacer fabric structures with representative units of different sizes designed based on the re-entrant hexagonal geometry were manufactured by using a RD7 double needle bar Raschel machine with seven yarn guide bars, two 3D jacquard warp-knitted spacer fabrics with different base fabric structures designed based on the rotating squares geometry were fabricated by using a RDPJ4/2 double needle bar jacquard machine with two ground yarn guide bars and four jacquard guide bars. The Poisson’s ratios of these 3D warp-knitted fabrics in the course direction and wale direction were evaluated respectively through constant-rate tensile tests. The results revealed that the re-entrant hexagonal fabric structure with double chain stitches has auxetic behavior across a wide range of tensile strains along the course direction, while the rotating square fabric structure with elastic chain stitches as the base is auxetic within a narrow range of tensile strains along the wale direction. The study provides an alternative method to directly produce auxetic warp-knitted spacer fabrics through a single knitting process instead of using an additional post-compression and heat-setting process.

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Qin, Zhi Gang, and Xiao Hong Ma. "Investigation on Tensile Properties of Weft Insertion Warp Knitted Fabric Reinforced Composites." Advanced Materials Research 821-822 (September 2013): 1200–1203. http://dx.doi.org/10.4028/www.scientific.net/amr.821-822.1200.

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Warp knitted fabrics possess a number of changes in the structures, so they do have great advantages on the property design of composites. The three kinds of weft insertion warp knitted fabrics are knitted on a Raschel latch needle warp knitting machine with glass continuous-filament yarns. The warp knitted fabric/ unsaturated polyester resin composite laminates are produced by manual molding technology. The tensile properties of composites in the course, wale and diagonal directions are tested on the universal material testing machine. The results show that the tensile stress/strain curves of the composites were nonlinear. The tensile properties of the composites possess obvious anisotropic characteristics. The tensile strengths and elastic modulus of the warp knitting composites depend on the needle space number of inlaid yarn, fabric density and structure.

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Liu, Haisang, Gaoming Jiang, and Zhijia Dong. "A shortened development process method for warp-knitted yarn-dyed shirt fabric." Textile Research Journal 91, no. 3-4 (July 26, 2020): 443–55. http://dx.doi.org/10.1177/0040517520937372.

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At present, warp-knitted yarn-dyed shirt fabric has become the research focus due to its comfort and highly efficient production. In order to shorten the development process of warp-knitted yarn-dyed shirt fabric, a computing method including theoretical modeling and simulation is proposed in this paper to simulate 2–5 guide bar warp-knitted yarn-dyed shirt fabric. Based on the structure model of warp-knitted fabric, a new model of geometric shape, including loops and underlap, is built according to size measurement results of the loops. In terms of the establishment of mathematical models, such as models of yarn-pressing, loop types, loop locations, guide bar threading, color and fineness, the transformation between knitting technology and mathematical language is realized. With the double buffer technique of HTML (Hypertext Markup Language), loops and underlaps of each bar are displayed separately on different canvases superposed in some order. Simulation is implemented for 2–5 bar warp-knitted yarn-dyed shirt fabric via JavaScript and C# programming languages. The results indicate that this method is able to simulate diverse 2–5 bar warp-knitted yarn-dyed shirt fabrics in a short time. The pattern effect can be seen with a high similarity and practicability before it is produced, thereby shortening the development.

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Chu, Yao, Haitao Lin, Hafsa Jamshaid, Qi Zhang, and Pibo Ma. "Experimental investigation on shear properties of warp-knitted brush fabrics." Journal of Engineered Fibers and Fabrics 15 (January 2020): 155892502094645. http://dx.doi.org/10.1177/1558925020946450.

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Warp-knitted brush fabrics are composed of an outer surface formed by weaving the front and rear needle beds with spacer yarns interposed between them. Warp-knitted brush fabrics can be used as a non-slip cover for car seat cushions; the adhesion between non-slip fabric and car seat is related to the shear strength of warp-knitted brush fabrics. In this article, to study the factors affecting the shear force of warp-knitted brush fabrics, three different processing methods and four different stretching speed intervals were used to find the effects of stiffeners and action of different speed intervals on shear properties of fabrics. The experimental results show that the stiffener treatment can improve the shear resistance of the warp-knitted brush fabrics, and the effect of different speed intervals can affect the shear resistance of fabrics. These findings will have a guiding significance in the design and production of warp-knitted brush fabrics applied to fabrics such as car seat cushions, and the results can also help to study the shear properties of warp-knitted brush fabrics for wider applications.

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Qin, Zhi Gang, and Bao Shi. "Investigation on Tensile Properties of Two Guide Bar Warp Knitted Fabric Reinforced Composites." Advanced Materials Research 602-604 (December 2012): 76–79. http://dx.doi.org/10.4028/www.scientific.net/amr.602-604.76.

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The composite laminates are produced by manual molding technology using two guide bar warp knitted fabrics of glass fiber as reinforcement and epoxy resin as matrix. The tensile properties of composites in the course, wale and diagonal directions are tested on the universal material testing machine. The influences of warp knitting stitch structures for mechanical performance of the composites are discussed. The results show that the tensile stress/strain curves of two guide bar warp knitted fabric reinforced composites were nonlinear. The tensile properties of composites possess obvious anisotropic characteristics. The tensile strengths and modulus of the warp knitting fabric composites depend on the yarn numbers bearing load along tensile direction, which are related to the stitches and structural parameters of warp knitted fabrics.

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Wang, Zhengyue, and Hong Hu. "Tensile and forming properties of auxetic warp-knitted spacer fabrics." Textile Research Journal 87, no. 16 (July 27, 2016): 1925–37. http://dx.doi.org/10.1177/0040517516660889.

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Poisson’s ratio (PR) is defined as the negative ratio between the lateral strain and the longitudinal strain of a material under tensile or compressive loading condition. Auxetic fabrics are those having a negative PR, which means that when their longitudinal strain is positive, their lateral strain is also positive, and vice versa. In this work, tensile and forming properties of auxetic warp-knitted spacer fabrics were investigated and compared with those of the conventional warp-knitted spacer fabrics. Both uniaxial tensile tests and hemispherical compression experiments were conducted, and the relationships of the tensile and forming properties with the auxetic effect were discussed in terms of different fabric structural parameters. The results show that the auxetic warp-knitted spacer fabrics have a prolonged low stress stage in the wale direction, indicating that they are more prone to undergo deformation along the wale direction, and fabric with a longer low stress stage has a better auxetic effect. The results also show that the formability of auxetic warp-knitted spacer fabrics is much better than that of conventional warp-knitted spacer fabrics, due to the much low forming energies required under hemispherical compression, which can be affected by many factors such as auxetic effect, fabric thickness and stiffness, yarn materials and the structure of the spacer layer. When all other parameters are similar, auxetic fabric with a better auxetic effect will have better formability. The study has provided useful information for the design and application of this type of nonconventional spacer fabrics.

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Yang, Kun, and Tian Sheng Ye. "Sound Insulation Property of Warp Knitted Fabrics." Advanced Materials Research 535-537 (June 2012): 1429–32. http://dx.doi.org/10.4028/www.scientific.net/amr.535-537.1429.

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In this study, a test device was designed and established for evaluating the sound insulation of fabrics, and six warp knitted fabrics with different parameters were chosen and tested. The results show that these fabrics have different sound insulation effect to various sound wave frequencies, and normally, the fabric with solid structure has better sound insulation effect that the fabric with thin structure, but the effect of latter fabric can be improved by using some treatments.

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Wu, W.-L., M. Kotaki, H. Hamada, M. Inoda, Z. Maekawa, R. Kanamaru, and N. Sanae. "Bending properties of 2.5 Dimensional Warp Knitted Fabric Reinforced Composites." Advanced Composites Letters 1, no. 6 (November 1992): 096369359200100. http://dx.doi.org/10.1177/096369359200100603.

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A study of bending properties of 2.5 dimensional warp knitted fabric reinforced composites is presented. Two kinds of 2.5 dimensional knitted fabric structure have been adopted. It is found that the mechanical properties of 2.5 dimensional warp knitted fabric reinforced composite with face structure of back half is superior to that with face structure of single dembigh. The effect of stretching the knitted structure before molding has also been taken into account. Finally, the future application of the 2.5 dimensional warp knitted fabric, e.g., to the resin transfer molding, is suggested.

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Lin, Jia Horng, Yu Tien Huang, Chin Mei Lin, Yi Chang Yang, and Ching Wen Lou. "The Evaluation of Physical Property and Manufacturing Process of Functional Warp Knitted Fabrics with Variation of Weft." Advanced Materials Research 287-290 (July 2011): 2664–68. http://dx.doi.org/10.4028/www.scientific.net/amr.287-290.2664.

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In recent years, the scientific progress has improved human life quality and changes the concepts of heath and heath care. It has been approved that the bamboo charcoal has various functions, including air cleaning, water purification, deodorization, far infrared radiation rate and anion amount. The bamboo charcoal fiber and bamboo charcoal yarn are applied extensively in the textile industry. In this study, PET fiber was used as warp, and PET fiber, bamboo charcoal nylon fiber and stainless steel fiber employed as weft to weave three groups of warp knitted fabric. The variation of far infrared radiation rate, anion amount concentration, air permeability, water absorption, flexibility of these three groups of fabric were examined. The results indicate that the far infrared radiation rate of these three groups of fabric attained 0.8. The anion amount concentration of bamboo charcoal and bamboo charcoal / stainless steel warp knitted fabrics has reached 490-495. Finally, the air permeability of bamboo charcoal / stainless steel warp knitted fabrics achieved 281 cm3/s/cm2.

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Kurbak, Arif. "Models for basic warp knitted fabrics Part III: the two guide bar fabrics (Double Tricot, Locknit, Reverse Locknit, Satin, Sharkskin)." Textile Research Journal 89, no. 10 (June 18, 2018): 1917–37. http://dx.doi.org/10.1177/0040517518779998.

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Two guide bar warp knitted fabrics are used as technical textile applications nowadays. In this, Part III of these series of papers, models for basic two guide bar warp knitted fabrics are created and given based on Parts I and II. Modeling of warp knitted fabrics started in the 1960s with some basic geometrical models and it was continued with using Non Uniform Basis Spline (NURBS) curves and surfaces. There were discontinuities in the loop parts in early created geometrical models and the NURBS models needed some control points from some sources. In this work instead of using NURBS curves, modeling of warp knitted fabric is attempted by using known curves. During creation of the models, curvature equalities are attained as much as possible, loop connection parts are modeled by having two continuously connected parabolas for the Double Tricot fabric and the loop connection parts of the other two bar fabrics are obtained by applying a sinus square curve to the connection part of the Double Tricot fabric. The models created are versatile and they can be changed and used for special cases. Models created are drawn to scale by using the 3DS-Max Computer Graphical Program. At first glance, it is seen that the model shapes are similar to the real fabric structures, which can be observed on photographs of them.

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Chen, Yan. "A Research on the Stress Dispersion Property of the Warp Knitted Space Fabric." Advanced Materials Research 652-654 (January 2013): 1436–40. http://dx.doi.org/10.4028/www.scientific.net/amr.652-654.1436.

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This paper firstly introduced the stress dispersion mechanism of the warp knitted space fabric, and then tested the stress dispersion effect of the warp knitted space fabric and sponge (PU foam) with the same thickness. The results show that the warp knitted space fabric can effectively disperse the compression, and the dispersion effect can be increased with the increase of the thickness in a specified limit.

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Chen, Qing, Pibo Ma, Haiwen Mao, Xuhong Miao, and Gaoming Jiang. "The Effect of Knitting Parameter and Finishing on Elastic Property of PET/PBT Warp Knitted Fabric." Autex Research Journal 17, no. 4 (December 20, 2017): 350–60. http://dx.doi.org/10.1515/aut-2017-0014.

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Abstract This study investigated the elastic elongation and elastic recovery of the elastic warp knittedfabric made of PET( polyethylene terephthalate) and PBT(polybutylene terephthalate) filament. Using 50/24F PET and 50D/24F PBT in two threadingbars, the tricot, locknit and satin warp knitted fabrics were produced on the E28 tricot warpknitting machine. The knitting parameters influencing the elastic elongation under 100N wereanalyzed in terms of fabric structure, yarn run-in speed and drawing density set on machine.Besides, dyeing temperature and heat setting temperature/time were also examined in order toretain proper elastic elongation and elastic recovery. The relationship between elastic elongationand knitting parameter and finishing parameter were analyzed. Finally, the elastic recovery ofPET/PBT warp knitted fabric was examined to demonstrate the elastic property of final finishedfabric. This study could help us to further exploit the use of PET/PBT warp knitted fabric in thedevelopment of elastic garment in future.

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Huang, Chien-Lin, Yu-Tien Huang, Ting-Ting Li, Chia-Hsuan Chiang, Ching-Wen Lou, and Jia-Horng Lin. "Composite processing and property evaluation of far-infrared/electromagnetic shielding bamboo charcoal/phase change material/stainless steel elastic composite fabrics." Journal of Polymer Engineering 36, no. 2 (March 1, 2016): 211–20. http://dx.doi.org/10.1515/polyeng-2015-0080.

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Abstract This study aims to fabricate far-infrared (FIR)/electromagnetic shielding composite fabric and its composite yarn. Five types of composite yarns with different sheath components were made by using bamboo charcoal (BC) fibers, phase change material (PCM) roving and stainless steel (SS) fibers via a ring spinning frame, and then fabricated into five elastic warp-knitted fabrics with different weft yarns using a crochet knitting machine. The mechanical properties of different constituents of composite yarns and their fabrics, as well as FIR emissivity and electromagnetic shielding effectiveness (EMSE) of resulting fabrics were evaluated. The results show that BC/SS composite yarns and their fabricated warp-knitted fabrics display the highest tensile strength. Warp-knitted fabrics containing BC fibers possess the highest FIR emissivity. EMSE of the fabricated warp-knitted fabrics improves proportionally with the number of the lamination layers. The resulting multifunctional elastic knitted fabrics apply as athletic clothing, underwear, socks, protective or healthcare products in the future.

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Yu, Zhi-Cai, Jian-Fei Zhang, Ching-Wen Lou, Hua-Ling He, An-Pang Chen, and Jia-Horng Lin. "Moisture Comfort and Antibacterial Properties of Elastic Warp-Knitted Fabrics." Autex Research Journal 15, no. 1 (March 1, 2015): 60–66. http://dx.doi.org/10.2478/aut-2014-0040.

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Abstract Multifunction elastic warp-knitted fabrics were fabricated on a crochet machine with the use of metal composite yarns/viscose yarn and bamboo polyester/ crisscross-section polyester hybrid yarns as the front face and back face of the knitted fabric structure, respectively. We investigated the effect of the blend ratio of bamboo charcoal/ crisscross-section polyester multiply yarns on the fabric's moisture comfort properties, such as water vapour transmission (WVT), water evaporation rate (WER), and water absorbency. The results showed that blending ratio significantly influenced WVT and WER. Moreover, antibacterial activity of the elastic warp- knitted fabric was tested against Staphylococcus aureus and Escherichia coli in accordance with AATCC 90-2011. Finally, the extension- stress value curves were used to analyse the elastic stretching property, and the fabric exhibited greater breaking elongation and lower stress value in the walewise than in the weft direction.

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Ma, Xiao Hong, and Zhi Gang Qin. "Research on Mechanical Properties of Warp Knitted Spacer Fabric Composites." Advanced Materials Research 332-334 (September 2011): 1760–63. http://dx.doi.org/10.4028/www.scientific.net/amr.332-334.1760.

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Two kinds of warp-knitted spacer fabrics are knitted on a Raschel latch needle warp knitting machine with glass continuous-filament yarns. The glass/ unsaturated polyester resin composites are produced by manual molding technology. The tensile and flexural properties of composite specimens are tested in automatic testing machine. The tensile and flexural properties of composites are analyzed in the course, wale and diagonal directions. The results show that mechanical properties of composites possess obvious orthotropic characteristics; the differences of fiber volume fraction and yarn orientations result in the different tensile mechanical of composites. Warp-knitted spacer fabric composites revealed good flexural mechanical properties.

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Ma, Xiao Hong, and Zhi Gang Qin. "Tensile Properties on Single-Bar Modified Tricot Fabric Reinforced Composites." Advanced Materials Research 535-537 (June 2012): 223–26. http://dx.doi.org/10.4028/www.scientific.net/amr.535-537.223.

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Four kinds of single-bar modified tricot fabrics are knitted on a Raschel latch needle warp knitting machine with glass continuous-filament yarns. The glass warp knitted fabric/ unsaturated polyester resin composites are produced by manual molding technology. The tensile properties of composite samples are tested on the universal material testing machine. The stress-strain curves, elastic modulus, fracture strengths of composites are analyzed in the course, wale and diagonal directions. The results show that the tensile stress/strain curves of single-bar modified tricot warp knitted fabric reinforced composites were nonlinear. The tensile properties of composites possess obvious anisotropic characteristics. The values of elastic modulus and tensile strength were in relation to the yarn numbers bearing tensile load in tensile directions

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Wardiningsih, Wiah, and Olga Troynikov. "Treated knitted fabric for hip-protective pads for elderly women, part I: force attenuation capacity." Textile Research Journal 89, no. 8 (April 16, 2018): 1408–16. http://dx.doi.org/10.1177/0040517518770683.

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This paper describes a study of hip-protective pads made from warp-knitted spacer fabric treated with shear thickening fluid (STF). Hip fractures, mostly caused by falls, are a substantial contributor to morbidity and mortality in the elderly, and incidence is rising worldwide. Hip-protective pads reduce fractures, but wearing adherence is poor. Protective pads made from breathable and comfortable fabrics can improve adherence and prevent more hip fractures. In this research, warp-knitted spacer fabrics were treated with STF using different methods. Treatment 1 involved STF and room-temperature vulcanizing silicone, while treatment 2 applied STF and tetraisopropyl titanate. The effects on force attenuation capacity of each treatment method, the amount of STF used, and fabric layering were measured using drop impact tests. Treated knitted spacer fabric had significantly higher force attenuation capacity than untreated knitted spacer fabric. Impact forces decreased as the number of layers increased and as STF concentrations rose. Treatments 1 and 2 produced fabrics with force attenuation capacity similar to that of closed-cell foam.

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Huo, Fu Lei, Guo Li Zhang, Jia Lu Li, Guang Wei Chen, and Li Chen. "Study on the Compression Properties of Epoxy Matrix Composites Reinforced by PES Warp-Knitted Spacer Fabric." Advanced Materials Research 217-218 (March 2011): 1208–11. http://dx.doi.org/10.4028/www.scientific.net/amr.217-218.1208.

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This research paper presents an experimental investigation on the compression and compressive resilience properties of warp-knitted spacer fabric composites with different resin content and different kinds of resin. By means of hand roller coating technology, four kinds of warp-knitted spacer fabric composites were made. The experiments were tested according to GB/T1453-2005 and ISO3386/2:1984. It is shown that the resin content and resin type seriously affect the compression and compressive resilience properties of warp-knitted spacer fabric composite. The data indicated that when the warp-knitted spacer fabric composite coated with the same kind of resin, with increasing resin content the elastic modulus added and the compressive resilience decreased. Having the same resin content, the compression properties of pacer fabric composite increase with the increase of flexural strength of resin; while the compressive resilience decrease.

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Ma, Zheng Yu, Jin Hua Jiang, Dong Fang Zhuo, and Nan Liang Chen. "Uniaxial and Biaxial Tensile Properties and Resilience of a Weft Knitted Modal Fabric." Applied Mechanics and Materials 670-671 (October 2014): 582–85. http://dx.doi.org/10.4028/www.scientific.net/amm.670-671.582.

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This paper is mainly to study the tensile and resilience performance in a knitted plain Modal fabric by uniaxial and biaxial experimental. The results indicated that under uniaxial tensile, the breaking strength along warp direction of the knitted plain Modal fabric was higher about 75% than the strength in weft, while weft elongation was higher about 60% than in warp. The strength-strain curves under uniaxial tensile and biaxial tensile of the fabric were made up of approximately three stages: a linear stage and two nonlinear stages. A set of parameters and a serial mathematical fitting model functions of the strength-strain curves were obtained by experimentally. It could be predicted stress and strain of knitted fabrics under some given certain elongation or load to meet certain clothing pressure comfort for underwear fabrics or garment.

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Chen, Si, and Hai Ru Long. "The Effect of Spacer Yarn Arrangement on Compression Behaviors of Novel Flexible Foam-Core Sandwich Composites." Advanced Materials Research 821-822 (September 2013): 1152–58. http://dx.doi.org/10.4028/www.scientific.net/amr.821-822.1152.

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In this study, a kind of novel flexible foam-core sandwich composite was involved. The flexible foam-core sandwich composites were fabricated based on 3D warp-knitted spacer fabrics. The foam-core was filled in the spacer fabric by using a kind of modified hydrophilic polyurethane foam. In order to investigate the effect of spacer yarn inclination angle on the compression behaviors. A compression test was carried out. The compression stress-strain curve was used to analyze the effect of 3D warp-knitted spacer fabric spacer yarn arrangement. According to the experiment results, it indicates that the spacer yarn arrangement could influence the anti-compression capacity of the sandwich composites obviously. Therefore, the spacer yarn arrangement of 3D warp-knitted spacer fabrics can be changed to meet specific end-use requirement for foam-core sandwich composites.

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Li, Ming, Yuanxin Wu, Chaoyu Chen, and Zhaoqun Du. "Characterization of plantar press-comfort performance of warp-knitted spacer fabrics." Textile Research Journal 88, no. 4 (November 25, 2016): 357–66. http://dx.doi.org/10.1177/0040517516679152.

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The main content dealt with in this paper was to present an objective method to evaluate the plantar press-comfort performance of warp-knitted spacer fabrics. It aimed to explain the plantar press-comfort performance of spacer fabric by the compression property and structure parameters of spacer fabric. The compression indexes (compression work, recovery work, hysteresis work and maximum compression force) and structure parameters (diameter and thickness) were utilized to classify the plantar press-comfort performance of warp-knitted spacer fabrics by regression analysis and the K-means cluster method. In order to verify the validity, subjective judgments were also made and compared with the objective K-means cluster method. The experimental results showed that a good correlation existed between the subjective judgment method and objective cluster method. This demonstrates that the compression indexes featured, from spherical compression force–displacement curves and structure parameters, can be utilized to characterize the plantar press-comfort performance of warp-knitted spacer fabrics and is effective in obtaining the fabric evaluation score of plantar press-comfort performance.

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Liang, Xinhua, Xuliang Yu, Zhijia Dong, and Honglian Cong. "Preparation and moisture management performance of double guide bar warp-knitted fabric based on special covering structure." Journal of Engineered Fibers and Fabrics 16 (January 2021): 155892502110469. http://dx.doi.org/10.1177/15589250211046951.

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This article provides a knitting method for warp-knitted fabrics with good moisture management performance. By adjusting of the warp knitting machine (mainly the bar), the design of lay-up method of the yarn, the selection of the yarn, and the warp let-off tension, the yarn covering relationship has been adjusted. By using two kinds of fineness polyester DTY, cotton yarn and spandex, designing two kinds of warp-knitting structures, six different warp-knitted fabrics have been knitted. The moisture management performance of these knitted samples was compared and evaluated. The study found that the greater the difference between the inner yarn and the outer yarn, the better the moisture management ability of the fabric. Polyester DTY with 50D/14F on the inner side and polyester DTY with 75D/288F on the outer side have the best moisture management performance. The polyester DTY with 50D/14F on the inside and 9.83Tex cotton yarn on the outside have higher wetting time and absorption rate.

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Lin, Jia Horng, Ching Wen Lin, Chin Mei Lin, Yi Chang Yang, Ting Ting Li, and Ching Wen Lou. "Pilot Study of PET/Bamboo Charcoal Warp-Knitted Fabric." Applied Mechanics and Materials 184-185 (June 2012): 1090–93. http://dx.doi.org/10.4028/www.scientific.net/amm.184-185.1090.

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In recent years, as improvement of human living life, people begin to focus on themselves health. It is certain that bamboo charcoal has many properties, including water purification, deodorization, anion release and far-infrared ray radiation. This study aims to prepare PET/BC warp-knitted fabric composed of polyester yarn (PET) as warp yarn and bamboo charcoal polyamine yarn (BC) as weft yarn using Velcro Crochet Machine. Afterwards, air permeability, elastic resilience and far-infrared ray emissivity of resulting knitted fabric were discussed by changing weft yarn type. Result shows that, for knitted fabrics, weft yarn type cannot affect the elastic resilience; yet PET weft yarn makes air permeability decreasing.

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Liu, Yanping, and Hong Hu. "An Experimental Study of Compression Behavior of Warp-knitted Spacer Fabric." Journal of Engineered Fibers and Fabrics 9, no. 2 (June 2014): 155892501400900. http://dx.doi.org/10.1177/155892501400900207.

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This paper presents an experimental study of the compression behavior of a typical warp-knitted spacer fabric which is specially developed as a cushioning material for human body protection. The fabric has a highly heterogeneous and discontinuous structure and exhibits a complicated compression behavior. Different test boundary conditions and sample sizes were first adopted to conduct compression tests of the fabric. Then, the compression behavior of the fabric was analyzed based on its compression load-displacement curve obtained under a selected test condition. The potential compression mechanism of the fabric was identified with support of the image analysis of the fabric structure at different compression stages. The study provides some useful information for designing warp-knitted spacer fabrics for impact protection.

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Wen, Zhang, and Shuai Liu. "Process and Design of Jacquard Warp Knitted Spacer Fabric." Fibres and Textiles in Eastern Europe 30, no. 1(151) (February 28, 2022): 67–70. http://dx.doi.org/10.5604/01.3001.0015.6464.

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Due to the rapid production of warp knitted jacquard spacer fabric in recent years, as well as physical properties of light, heat conduction, buffering effect, compression resistance, moisture permeability and air permeability, warp knitted spacer fabric has been used more and more widely in clothing, shoes and hats, as well as in fields such as medical care, construction engineering, safety protection and others. The design demand for different patterns and functions is also increasing gradually. Jacquard designers established a complete design model which plays a certain guiding role in the design of warp knitted spacer fabric. It brings innovative design to the surface pattern and structure of the fabric, making it more functional. The adoption of computer aided design also has a certain guiding role in the design process. Taking the CAD pattern design of warp knitted spacer fabric as an example, which combines the functional characteristics of the fabric and the jacquard pattern. Thus, we design fabric products that meet the market demand and initiate fashion trends.

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Arumugam, Veerakumar, Rajesh Mishra, Maros Tunak, and Jiri Militky. "In-plane shear behavior of 3D warp-knitted spacer fabrics: Part II—Effect of structural parameters." Journal of Industrial Textiles 48, no. 4 (December 9, 2017): 772–801. http://dx.doi.org/10.1177/1528083717747332.

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The objective of this work is to study the in-plane shear behavior of 3D warp-knitted spacer knitted fabrics by using a picture frame fixture. This part aims to investigate the effects of structural parameters on the shear stress and energy absorption of warp-knitted spacer fabrics. A group of warp-knitted spacer fabrics was produced on a double-needle bar Raschel machine by varying their structural parameters including spacer yarn fineness, fabric thickness, and outer layer structure. The effects of fabric structural parameters on the shear properties of the spacer fabrics were tested and analyzed based on the nonlinear behavior of shear stress versus shear angle and the deformation mechanism. During loading process, the series of surface images were acquired in certain interval at different positions. These images were processed in image analysis software to obtain the full-field displacement and shear angles at chosen points on the surface of test specimen. The potential shear behavior of the fabric was identified with support of the shear stress–strain curve, work done, and efficiency at different shear stages. The regression model was used to establish the elastic deformation properties to obtain the shear results. Advance statistical evaluation and two-way analysis of variance are used to analyze the significance of various factors such as thickness, spacer yarn diameter, and surface structures on energy absorption at maximum shear load and deformation.

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MUHAMMET, AKAYDIN. "Comparison of the physical properties of woven and warp knitted bathrobe towel fabrics produced with similar properties." Industria Textila 73, no. 02 (April 30, 2022): 137–44. http://dx.doi.org/10.35530//it.073.02.202053.

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In recent years, the use of towel fabrics produced by warp knitting machines in the production of bathrobe fabrics has gradually increased. These fabrics, which can be produced more massively at a lower cost, also show a more flexible character than woven towel fabrics. When working with two pile yarn groups whose raw materials or properties are different from each other, the creation of fabric structures with a completely different face and back is seen among the reasons for choosing these fabrics. In this study, after determining the basic performance characteristics such as weight, tensile strength, tear strength, bursting resistance, shrinkage, and water absorbency of the bathrobe towel fabrics produced with the weaving and warp knitting technique, which has undergone the same finishing processes, their performance and strength properties were compared with each other and the results were evaluated using statistical analysis methods. It has been determined that while woven towel fabrics give higher strength values, warp-knitted towel fabrics show higher stretch. The degree of hydrophilicity degree is increased significantly after sequential finishing processes in both towel fabrics. As a result of the finishing processes, there was a general decrease in the tear strength of the woven bathrobe terry fabric, while there was no systematic decrease in the other strength parameters and the strength properties of the warp-knitted towel fabric. In consequence of the finishing processes in both towel fabric structures, a significant reduction in size was observed in the warp direction.

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Du, Zhaoqun, Ming Li, Yuanxin Wu, and Linge He. "Analysis of spherical compression performance of warp-knitted spacer fabrics." Journal of Industrial Textiles 46, no. 6 (July 28, 2016): 1362–78. http://dx.doi.org/10.1177/1528083715624255.

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Warp-knitted spacer fabrics for cushion products are in contact with different parts of human body. Surface shapes of most contacting parts can be simplified as spherical caps, while there are few reports on relationship between sphere diameter and compression property of spacer fabric. Therefore, the main content dealt with in the paper was to conduct spherical compression and simulation analysis of warp-knitted spacer fabrics. Five spherical indenters were selected and three compression indices were featured. Comparisons of compression indices results of spacer fabrics amongst five spherical indenters exhibited good relations. Moreover, spherical compression behavior was simulated by finite element method to better understand the mechanism of spherical compression deformation of warp-knitted spacer fabrics. The results that relative errors of the compression indices were all small showed a good accordance between theoretical and experimental results; then, stress distribution and displacement evolutions were analyzed to discover deformation mechanism of spacer filaments compressed. It is effective to simulate the spherical compression performance between different parts of human body and spacer fabric.

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Jia, Xi Wen, Jia Zhi Su, Yi Zhu Zheng, Bo Hong Gu, and Bao Zhong Sun. "Mechanical Response and Damage Analysis of 3D Multi-Structured Knitted Composite under Quasi-Tensile Loadings." Advanced Materials Research 476-478 (February 2012): 767–70. http://dx.doi.org/10.4028/www.scientific.net/amr.476-478.767.

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The mechanical response and damage mechanism of a 3D multi-structured knitted composite under quasi-tensile loadings are investigated based on experimental results. The multi-structured knitted composite consists of two knitted fabrics with weft double-faced interlock knitted fabric as core material and biaxial warp-knitted fabric as surface layer in the above-mentioned composite system, respectively. The tensile stress against strain curve is obtained to analyze the mechanical behavior. Furthermore, the failure mechanisms of 3D multi-structured knitted composite are discussed from the experimental observations by the initiation and propagation of damaged zone in knitted composites.

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Cong, Honglian, Hui Lei, Yongchao Zhang, Aijun Zhang, and Pibo Ma. "Weft-knitted lace fabric simulation based on the spring-mass model." International Journal of Clothing Science and Technology 29, no. 1 (March 6, 2017): 60–68. http://dx.doi.org/10.1108/ijcst-10-2015-0118.

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Purpose The obtained simulation structures could reflect the appearances and the features of the fabrics. The purpose of this paper is to promote a lot for design and manufacturing of weft-knitted lace fabrics (WKLF). Design/methodology/approach The advantages of WKLF compared with warp-knitted ones were displayed. The formation mechanism of the WKLF was analyzed with employing the mechanics principles. Spring-mass model was proposed in this paper to achieve the simulation of the fabrics. End mass points and intermediate mass points were involved in the model. The displacement of end mass points was considered the dominance and the foundation to settle the positions of all the mass points. Findings A novel jacquard lace style fabric with pattern-background effect knitted on circular knitting machine were put forward, which were different from the traditional lace fabrics manufactured on the warp knitting machines. Originality/value First, as the manufacturing equipment, circular knitting machine costs much less than warp knitting machine; second, the elastic performance along weft direction of WKLF is more excellent than that of warp-knitted ones. Third, the excellent extensibility gives nice comfort; furthermore, long floating threads do not exist on the WKLF surface, so that the snag will be avoided.

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Guo, Dandan, Shuai Wang, Yuxiang Yin, Jun Luo, Chenjie Meng, Qingsheng Liu, Haiyan Ni, and Jianyong Feng. "Preparation of three-dimensional multilayer ECM-simulated woven/knitted fabric composite scaffolds for potential tissue engineering applications." Textile Research Journal 90, no. 7-8 (October 23, 2019): 925–36. http://dx.doi.org/10.1177/0040517519883958.

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The extracellular matrix (ECM), with its multilayer fiber structure, regulates diverse functions including cell proliferation, migration, differentiation and tissue regeneration effects. To mimic and replace the native ECM, the structures and properties of three single-layer fabric substrates including warp/weft-knitted and woven fabrics were analyzed, then two-layer warp/weft-knitted composite fabrics prepared by polyurethane (PU) bonding, and woven composite fabrics prepared by polycaprolactone (PCL)/collagen solution bonding or PU bonding, were studied. After PCL/collagen solution bonding or PU bonding, properties such as pore diameter, air permeability, stress and the contact angle of composite fabrics decreased by some degree, while fiber diameter, thickness and the thermal conductivity of composite fabrics increased. In combination with fiber diameter, pore diameter and physical properties, we know that warp- or weft-knitted composite fabrics are ideal scaffolda for potential applications in nerve, myocardium and tendon tissue engineering.

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Yang, Tong, Wei Zhou, and Pibo Ma. "Manufacture and Property of Warp-Knitted Fabrics with Polylactic Acid Multifilament." Polymers 11, no. 1 (January 4, 2019): 65. http://dx.doi.org/10.3390/polym11010065.

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This study investigates the properties of polylactic acid (PLA) multifilament and its warp-knitted fabrics. Multifilament properties were tested and compared with PET multifilament with different diameters. The 83.3 dtex PLA multifilament was used to knit the fabric, and the fabric properties before and after dyeing were studied. Results showed that the mechanical properties of PLA multifilament were comparable to those of PET. However, PLA had a higher heat shrinkage rate. The dyed PLA warp-knitted fabric has excellent color fastness. Due to the influence of temperature and dye particles during the dyeing process, the breaking strength, air permeability and moisture permeability of the fabric were decreased. On the contrary, the elongation at break, abrasion resistance, anti-pilling properties, drape and crochet value of the fabric were increased.

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Chen, Chaoyu, Zhaoqun Du, Weidong Yu, and Tilak Dias. "Analysis of physical properties and structure design of weft-knitted spacer fabric with high porosity." Textile Research Journal 88, no. 1 (November 13, 2016): 59–68. http://dx.doi.org/10.1177/0040517516676060.

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The main content dealt with in the paper is to present a kind of weft-knitted spacer fabric with high porosity. It is a kind of three-dimensional textile fabric with a sandwich structure that consists of a middle layer of multifilament and two outer layers of plain-knitted fabric. Compared with traditional warp-knitted spacer fabric as cushion mats, weft-knitted spacer fabric is well used as apparel for good softness, thermal/moisture comfort, and air permeability. Therefore, three structures were designed and nine samples were prepared by choosing plain-knitted fabric as the outer layers and selecting soft and thin multifilament as a middle layer. Experimental results show that this kind of weft-knitted spacer fabrics has high porosity, greater than 86%, and also demonstrate that the weft-knitted spacer fabric is suitable for comfortable apparel based on experimental results of air permeability, compression properties, stiffness, and thermal insulation properties.

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Bu, Yi Hua, Yan Feng, and Hua Wu Liu. "The Axial Warp-Knitted Fabric and its Reinforced Composite." Advanced Materials Research 332-334 (September 2011): 837–40. http://dx.doi.org/10.4028/www.scientific.net/amr.332-334.837.

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The structure and performance of the axial warp-knitted composite were introduced, including bi-axial and multi-axial organizations. According to the unique structure of this fabric, the mechanical properties and the advantages as a composite reinforcement were compared with regular staple woven fabrics. The advantages of composites reinforced by bi-axial and multi-axial knitted fabrics were discussed and the applications of such advanced materials were briefly presented.

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Lin, Jia Horng, Yu Tien Huang, Chin Mei Lin, and Ching Wen Lou. "Comfort and Function Evaluations of Warp-Knitted Fabrics." Advanced Materials Research 910 (March 2014): 442–45. http://dx.doi.org/10.4028/www.scientific.net/amr.910.442.

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People have been paying attention to wearers comfort with functional textile products, the clothing type of which are further required to be eco-friendly and versatile as well as to help health care and to make wearers comfortable. This study uses bamboo charcoal (BC)/stainless steel (SS) wrap yarns for warp-knitted fabrics with three structural arrangements, and the influence of which on the far infrared (FIR) emissivity, softness, air permeability, and water absorption of the resulting warp-knitted fabrics are then examined. The FIR emissivity of all three fabric types is beyond 0.8. Single-faced, front-weft BC/SS warp-knitted fabrics possess optimal air permeability of 290 cm3/s/cm2and optimal softness of 3.9 cm. The results of this study can serve as reference for the research design and direction of health care fabrics and increase their added value.

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Chang, Yuping, and Pibo Ma. "Energy absorption and Poisson's ratio of warp-knitted spacer fabrics under uniaxial tension." Textile Research Journal 89, no. 6 (February 12, 2018): 903–13. http://dx.doi.org/10.1177/0040517518758005.

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This paper presents five different auxetic warp-knitted spacer fabrics and discusses their energy absorption under uniaxial tension through integrals of stress on strain. Structures of auxetic fabrics are designed based on rotating hexagonal models and knitted for experimental tests, including Poisson's ratio tests and tensile tests. Results show that energy absorption of auxetic warp-knitted spacer fabric is mainly determined by its structural deformation capacity and yarn loading capacity, between which the yarn loading capacity of fabrics plays the dominant part in energy absorption, while the structural deformation capacity, which is affected by Poisson's ratio, has relatively little influence. With equivalent yarn loading capacity, the energy absorption of fabrics with negative Poisson's ratios are relatively better.

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Chen, Wei Lai, Lin Yan Wan, and Wei Hong Zhan. "Study on Elongation Properties of Car Roof Interior Fabric." Applied Mechanics and Materials 556-562 (May 2014): 36–39. http://dx.doi.org/10.4028/www.scientific.net/amm.556-562.36.

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Elongation properties of car roof interior fabric were studied in this article.The FM02-11 type universal material testing machine was employed to test the static and dynamic elongation properties of warp knitted napped fabric 1,2,3,warp knitted fabric 1,2,pile composite fabric A1,A2,A3 and sponge composite fabric C1,C2,C3,C4. The results indicated all can meet the general standard for car interior ceiling fabric.According to the dynamic elongation, the bigger the deformation ratio, the better the formability.

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Mezarcıöz, Serin. "Effect of Industrial Washing and Laundering on the Colour Values of Knitted Denim." Fibres and Textiles in Eastern Europe 29, no. 6(150) (December 31, 2021): 65–71. http://dx.doi.org/10.5604/01.3001.0015.2725.

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One of the most distinctive features of denim is that the warp yarn is dyed with indigo dye and the weft yarns are not dyed, i.e. white. Although warp yarns dyed with indigo dye are woven with different woven fabric weaves, classical denim fabrics weave are produced with 3/1 Z twill weave. The search for new products in denim has led businesses to produce denim-looking knitted fabrics. Denim-looking knitted garments are subjected to industrial washing at the production phase and repetitive household washing processes in daily life. Repeated washing and drying processes cause changes that can affect user satisfaction in terms of losing the colour of the fabric. Therefore, in this study, the colour values of knitted denim fabrics produced as an alternative to denim fabrics manufactured by traditional methods after various industrial (rinse, enzyme and stone washing) and home washes (5, 10, 20 times) were examined. For this, the CIELab colour system was taken as the basis for colour analysis on a spectrophotometer device. As a result of the washing processes performed on each fabric sample (household washing and rinse, enzyme, stone washing applications), it was observed that there were differences in colour values depending on the fibre type, loop yarn length, fabric construction and washing process.

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Zhang, Aijun, Xinxin Li, Pibo Ma, Ying Xiong, and Gaoming Jiang. "3D simulation model of warp-knitted patterned velvet fabric." International Journal of Clothing Science and Technology 28, no. 6 (November 7, 2016): 794–804. http://dx.doi.org/10.1108/ijcst-01-2016-0006.

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Purpose Realistic geometric description is essential for simulating physical properties of warp-knitted velvet fabrics, which are widely used for home-textiles and garments. The purpose of this paper is to provide an approach to the description of patterned piles and propose a customized simulation model to realize highly real-time simulation of warp-knitted velvet fabrics in three dimensions. Design/methodology/approach Based on knitting technology and structure features, a mathematical model to qualify forming possibility of piles is conducted by assessing underlaps of pattern bars and pile ground bars. When the pile areas and ground areas are classified, a three-dimensional (3D) space coordinate is built, of which the z-axis is divided into equal spaces to form certain multi-layer textured slices. Color and transparency of piles on each textured slice can be computed and generated by mapping to 3D geometrical grid layers with particular mapping relationship. Moreover, piles’ deflection and spatial collision are also taken into account to make sure high uniformity with real fabrics. Findings According to the models built, a simulator special for warp-knitted patterned velvet fabrics is programed via Visual C++ and the models are proven practical and easily implemented by comparing simulated effect of one sample with real fabric. Research limitations/implications Because of present limited research, 3D simulation of patterned velvet fabrics knitted on double-needle bar Raschel machine as well as 3D shadow effect will be studied in the further research. Practical implications The paper includes implications for designing patterned velvet products and shows convenience to instantly see finished effect without sampling on machine. Originality/value This paper fulfills a featured simulation method for warp-knitted patterned velvet fabrics in 3D dimensions for the first time.

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Cieślak, Małgorzata, Agnieszka Karaszewska, Ewa Gromadzińska, Izabela Jasińska, and Irena Kamińska. "Comparison of methods for measurement of the pressure exerted by knitted fabrics." Textile Research Journal 87, no. 17 (September 2, 2016): 2117–26. http://dx.doi.org/10.1177/0040517516665255.

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The article presents the results of measurements of pressure exerted by two model knitted products – bands with different structure (WI jersey weft-knitted fabric and WII openwork warp-knitted fabric). The tests were carried out with using the I-Scan system (in vivo and in vitro tests) and the STM 579 device (in vitro test). A comparative analysis of the in vivo and in vitro results for the I-Scan method and in vitro results for the I-Scan and STM 579 method was performed. It was found that the pressure values are lower for openwork warp-knitted fabric than for jersey weft-knitted fabric both in the case of the in vitro and in vivo tests, and the values of pressure for the same band are higher in the case of the in vitro tests.

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Lin, Chin Mei, Ching Wen Lou, Ruo Si Yan, Po Ching Lu, and Jia Horng Lin. "Characterization and Recovery Evaluation of Elastic Knitted Fabric." Applied Mechanics and Materials 749 (April 2015): 241–44. http://dx.doi.org/10.4028/www.scientific.net/amm.749.241.

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The present study aims to investigate the effects of the ratio of different rubber threads on the elastic, tensile, air permeability, andfar-infrared emissivity properties ofelastic warp-knitted fabric. Polyester filaments and rubber threads were applied as warp yarns while bamboo charcoal (BC)/Nylon (NY) filament was used as weft yarn to fabricate elastic knitted fabric (EKF) by using Velcro Crochet Machine. The four different ratios of rubber threads in warp direction were 0 %, 25 %, 50 % and 100 %. The result revealed that with the increase in weight ratio of the rubber thread, the air permeability decreased while the tensile elongation tended to increase in both warp and weft directions.

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Guo, Nangkuo, Min Sun, Lan Cheng, Chenlong Jiang, Wenhao Chen, and Lingxiao Jing. "Strength characteristic and failure criterion of flexible multi-axial warp-knitted fabrics coated with polyurethane on single side." Journal of Industrial Textiles 49, no. 3 (June 18, 2018): 318–27. http://dx.doi.org/10.1177/1528083718779448.

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Coated fabrics are widely used in tension structures. In order to investigate the tensile behaviors of the coated fabrics, one group of specimens was cut out from multi-axial warp-knitted polyester fabrics coated with polyurethane on one side. These failure strengths of polyurethane-coated multi-axial warp-knitted fabrics were obtained by the method of uniaxial tensile test and a failure stress criterion is presented for the kind of materials. The results show that the coated fabric is anisotropic material, and the coating has great influence on the mechanical properties of the material. Furthermore, the failure stress criterion can be used for references in material design and application.

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Kyzymchuk, Olena, and Liudmyla Melnyk. "Stretch properties of elastic knitted fabric with pillar stitch." Journal of Engineered Fibers and Fabrics 13, no. 4 (December 2018): 155892501882072. http://dx.doi.org/10.1177/1558925018820722.

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Knitted fabrics and products are subjected to a variety of stresses and loads/deformation during their usage. The loads are different by value, by direction, and by duration. The alternations of loading and unloading or resting processes affect the knitted structure and could bring about changes in the linear dimensions of the fabric or result in the deformation of the knitted items and ultimately the loss of product appearance or its functional properties. A wide range of textile materials resistant to multiply loads was produced by using elastomeric yarn that has an elongation of more than 95% and is able to attain full recovery after relaxation due to its chemical composition. This case study examines two existing test methods for evaluating the stretch properties of textile materials produced with the elastomeric yarns with emphasis on warp knitted abdominal binder-type fabrics. It was found that the linear density of the weft in-laying threads and the preliminary tension of the ground yarn which formed pillar stitch affect stretch properties of elastic warp knitted fabric: the full deformation and its constituent parts. The change in the preliminary elongation of the bare spandex in the 210%–270% range does not have a significant effect.

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Chen, Si, Xue-pei Zhang, Hong-xia Chen, and Xiao-ping Gao. "An Experimental Study Of The Compression Properties Of Polyurethane-Based Warp-Knitted Spacer Fabric Composites." Autex Research Journal 17, no. 3 (September 26, 2017): 199–205. http://dx.doi.org/10.1515/aut-2016-0010.

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AbstractThe present work has reported the compression properties of polyurethane-based warp-knitted spacer fabric composites (PWSF). In order to investigate the effect of structural parameters of fabric on the compression performance of composites, a series of warp-knitted spacer fabrics (WSF) with different structural parameters including spacer yarn inclination angle, thickness, fineness of spacer yarns, and outer layer structure have been involved. The produced composites have been characterized for compression properties. The energy-absorption performance during the compression process has been determined as a function of the efficiency and the compression stress obtained from compression tests. The results show that the composites based on spacer fabrics having smaller spacer yarns inclination angle, higher fabric thickness, finer spacer yarn, and larger mesh in outer layers perform better with respect to energy-absorption properties at lower stress level, whereas at higher stress level, the best energy-absorption abilities are obtained in case of spacer fabrics constructed of larger spacer yarn inclination angle, lower fabric thickness, coarser spacer yarn, and smaller mesh in surface layers.

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Wu, W.-L., M. Kotaki, A. Fujita, H. Hamada, M. Inoda, and Z. Maekawa. "Bending properties of Warp Knitted Fabric Reinforced Composites." Advanced Composites Letters 1, no. 5 (September 1992): 096369359200100. http://dx.doi.org/10.1177/096369359200100505.

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This paper dealt with the bending properties of warp knitted fabric reinforced composites. With the increasing of course density and the variation of knitted structure, the bending strength and modulus increased in course direction and kept invariable in wale direction. Furthermore, the specimen setting back side of knitted fabric at tensile side exhibited superior bending strength in course direction.

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Journal articles on the topic 'Warp-knitted fabric'

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