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Journal articles on the topic 'Paper pulp'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Stankovská, Monika, Mária Fišerová, Juraj Gigac, and Elena Opálená. "EFFECT OF ADDITION OF DEINKED PULP TO BLEACHED KRAFT PULP ON TISSUE PAPER PROPERTIES." WOOD RESEARCH 66(3) 2021 66, no. 3 (2021): 505–16. http://dx.doi.org/10.37763/wr.1336-4561/66.3.505516.

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The influence of addition of deinked pulps with low and high brightness to bleached eucalyptus and pine kraft pulps on functional tissue paper properties was studied. Deinked pulps with low and high brightness had some different functional properties. Deinked pulp with high brightness has higher bulk, porosity, water absorption after immersion, initial water absorption, bulk softness as well as brightness. On the contrary, the difference in relative bonded area and porosity e between deinked pulps with low and high brightness was moderate. The mixed pulps laboratory pulp sheets from bleached e

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2

GONG, CHEN, ASIF HASAN, BILJANA M. BUJANOVIC, and THOMAS E. AMIDON. "Novel blend of biorenewable wet-end paper agents." January 2012 11, no. 1 (2012): 41–48. http://dx.doi.org/10.32964/tj11.1.41.

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Recent studies have shown potential for a designed biorefinery product, polylactic acid (PLA), to increase the strength-to-weight ratio of paper produced from conventional kraft pulp and kraft pulp made from hot-water extracted hardwoods (biorefinery pulp). These results indicated that, after surface-treatment with 2 % PLA (per ovendry [o.d.] fiber basis), paper made from sugar maple biorefinery pulp could be equivalent to or even greater in strength than paper made from sugar maple conventional kraft pulp, while retaining its higher bulk. In the current study, we present the results of reinfo

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3

Małachowska, Edyta, Marcin Dubowik, Aneta Lipkiewicz, Kamila Przybysz, and Piotr Przybysz. "Analysis of Cellulose Pulp Characteristics and Processing Parameters for Efficient Paper Production." Sustainability 12, no. 17 (2020): 7219. http://dx.doi.org/10.3390/su12177219.

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For economic reasons, increasing the use of various fibrous pulps with high lignin contents—i.e., chemothermomechanical pulp (BCTMP and CTMP), thermomechanical pulp (TMP), and semichemical pulp—is desirable. The relatively good quality and increased efficiency of these pulps make them attractive paper semi-products. In particular, they could alleviate the severe shortage of paper semi-products. Although mechanical pulp and semichemical pulp are achieving increasing quality with substantially increased wood efficiency, their production is often characterised by high consumption of electricity t

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4

de Assis, Tiago, Joel Pawlak, Lokendra Pal, et al. "Comparison of wood and non-wood market pulps for tissue paper application." BioResources 14, no. 3 (2019): 6781–810. http://dx.doi.org/10.15376/biores.14.3.6781-6810.

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A comparison among ten market pulps at a laboratory scale using uncreped tissue handsheets was performed to study the performance of wood and non-wood pulps for tissue manufacturing, evaluate what fiber features are desired for a specific tissue property, and determine how non-wood pulps can be used to replace or complement wood pulps in tissue products. A characterization of the fiber morphology and handsheet properties (softness, water absorbency, and strength) was performed at different mechanical refining levels. The results showed that the fiber morphology had a major impact on tissue pro

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5

Ntifafa, Yao, Yun Ji, and Peter W. Hart. "Understanding polyamidoamine epichlorohydrin (PAAE) retention in paper." BioResources 19, no. 3 (2024): 4568–89. http://dx.doi.org/10.15376/biores.19.3.4568-4589.

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Polyamidoamine epichlorohydrin (PAAE) is a permanent wet strength resin used in papermaking. When applied to paperboard, some amount of resin is retained in the sheet, and some is lost to the white water. The papermaker usually knows the amount of PAAE charged to the pulp but has no idea how much chemical is retained in the sheet. In addition, the influence of PAAE dosage, freeness, zeta potential, and pulp kappa number variability on PAAE retention is not well understood. Factorial design experiments using unbleached and bleached softwood (loblolly pine) kraft pulps were conducted to understa

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6

ISLAM, SHARMIN, M. MOSTAFIZUR RAHMAN, M. NAKIB HOSSEN, M, NURALAM LIKHON, HASAN JAMEEL, and M. S. JAHAN. "Conversion of paper-grade pulp from rice straw into dissolving pulp." TAPPI Journal 24, no. 6 (2025): 289–99. https://doi.org/10.32964/tj24.6.289.

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About 1,165 million metric tons of rice straw is generated every year worldwide, which can be a good source for the circular bioeconomy. In this research paper, the paper-grade pulp from rice straw was converted to dissolving-grade pulp by fractionation in a biorefinery initiative. Rice straw was cooked at an optimum condition of 8% potassium hydroxide (KOH) charge for 120 min at 150°C and produced a pulp yield of 47.2% with a kappa number of 18.5. Subsequently, D0(EP)D1 bleaching was carried out for the produced pulp, and the brightness of the pulp reached to 82.4%. From the black liquor, 16.

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7

Seisto, Anu, and Krisriina Poppius-Levlin. "Fibre characteristics and paper properties of formic acid / peroxyformic acid birch pulps." Nordic Pulp & Paper Research Journal 12, no. 4 (1997): 237–43. http://dx.doi.org/10.3183/npprj-1997-12-04-p237-243.

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Abstract The fibre and paper properties of nine unbleached formic acid / peroxyformic acid (MILOX) pulps with kappa number 6-20 were studied and compared with a kraft pulp with kappa number 20. The degree of deformation was greater in the MILOX fibres, affecting the paper properties of the MILOX pulps. The large number of curl and kinks in the MILOX fibres were probably caused mechanically. The MILOX fibres showed greater conformability, resulting in higher paper density. The defects in the MILOX fibres were apparently so severe as to cause fibre breakage during PFI beating of the pulps. As a

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8

GIGAC, JURAJ, and MARIA FISEROVA. "Influence of pulp refining on tissue paper properties." August 2008 7, no. 8 (2008): 27–32. http://dx.doi.org/10.32964/tj7.8.27.

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We investigated the influence of refining conditions (refiner tackle type and specific edge load) on bulk softness, absorbency, tensile strength, and wet tensile strength of bleached pulp. Commercial elemental chlorine free (ECF) and totally chlorine free (TCF) bleached sulfite and kraft spruce, birch, and eucalypt pulps were used in this investigation. We found that refiner tackle type and specific edge load had a significant influence on the evaluated properties. Higher specific edge load when using a universal tackle increases softness and absorbency of hard-wood kraft pulps. The highest te

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9

J. OGLESBY, ROBERT, HUMPHREY J. MOYNIHAN, RICARDO B. SANTOS, ASHOK GHOSH, and PETER W. HART. "Does kraft hardwood and softwood pulp viscosity correlate to paper properties?" October 2016 15, no. 10 (2016): 643–51. http://dx.doi.org/10.32964/tj15.10.643.

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The impact of commercially prepared, fully bleached pulp viscosity variation on handsheet physical properties was evaluated at different levels of pulp refining. Hardwood pulps from the same brownstock species mix, cooking parameters, and kappa numbers were processed through two different commercial bleach plants: one with a D0(EP)D1D2 sequence and the second with an OD0(EOP)D1 sequence. Additionally, a commercial softwood (predominately Scotts pine) brownstock pulp bleached by an OD0(EP)D1D2 sequence was employed in this study. Pulps with viscosities ranging from 14 to 21 mPa∙s were refined i

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10

NAKANO, JUNZO. "Pulp and Paper-Pulp." Sen'i Gakkaishi 45, no. 12 (1989): P543—P549. http://dx.doi.org/10.2115/fiber.45.12_p543.

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11

Andrade, Marcela Freitas, and Jorge Colodette. "PRODUCTION OF PRINTING AND WRITING PAPER GRADE PULP FROM ELEPHANT GRASS." CERNE 22, no. 3 (2016): 325–36. http://dx.doi.org/10.1590/01047760201622032186.

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ABSTRACT The main goal of this study was to characterize chemically and morphologically elephant grass (Pennisetum purpureum), and evaluate the potential of its fibers for production of printing and writing paper grade pulp. The elephant grass was chemically and morphologically characterized and cooked by the soda process to two different degrees of delignification (kappa 17.5 and 10.6). The resulting pulps were fully bleached by the O-D*-(EP)-D sequence and characterized for their beatability, drainability and physical-mechanical properties. The lignin content (20.2%) was low, indicating that

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YUAN, ZHIRUN, and CYRIL HEITNER. "Evaluation of Loblolly Pine Mechanical Pulps for LWC Paper." October 2008 7, no. 10 (2008): 4–11. http://dx.doi.org/10.32964/tj7.10.4.

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"Although the wood cost of loblolly pine (Pinus taeda) is lower than that of northern softwoods due to its fast growth rate and suitability for plantation harvesting, loblolly pine mechanical pulps tend to have poor quality and are mainly used in low-value grades such as newsprint. Our recent studies have shown that low-intensity refining or chemical pretreatments can significantly improve the mature pine pulp quality and make it possible to use this pulp in high-value grades like lightweight coated paper (LWC). In this report, we present our evaluation of the use of bleached low-intensity mat

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13

Aksenov, A. S., I. G. Sinelnikov, A. R. Shevchenko, et al. "Enzymatic conversion of wood materials from the pulp and paper industry." Prikladnaâ biohimiâ i mikrobiologiâ 60, no. 3 (2024): 274–83. http://dx.doi.org/10.31857/s0555109924030068.

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The reactivity during enzymatic hydrolysis of 8 industrially produced samples of pulps and semi-chemical pulps by enzyme preparations of glycosyl hydrolases B151 and F10 produced by a strain of ascomycete fungus Penicillium verruculosum has been determined. It is shown for the first time that among fibrous pulps available on the market of pulp and paper industry in Russia, the highest level of yield of glucose from the initial wood during biocatalysis using cellulases and hemicellulases is characteristic of semi-chemical pulps obtained after cooking of hardwood with green liquor. A high degree

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14

Janzon, Ron, Jürgen Puls, and Bodo Saake. "Upgrading of paper-grade pulps to dissolving pulps by nitren extraction: Optimisation of extraction parameters and application to different pulps." Holzforschung 60, no. 4 (2006): 347–54. http://dx.doi.org/10.1515/hf.2006.055.

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Abstract Xylans were selectively removed from paper-grade pulps by nitren extraction to produce dissolving pulps. Extraction parameters were optimised for a birch kraft pulp regarding time, temperature, liquor/pulp ratio, and total nitren charge. Furthermore, the applicability of the method was investigated for two other kraft pulps obtained from eucalyptus and mixed softwood, and for one beech sulfite pulp. Extracted pulps were characterised regarding their carbohydrate content and Cuen viscosity. The nitren charge was a decisive factor for xylan removal and pulp purity. The combination of a

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15

SUNDBERG, ANNA, LARI VÄHÄSALO, and BJARNE HOLMBOM. "Acid methanolysis: An analytical tool for estimating the proportions of different pulp types in deinked pulp or recovered paper." August 2013 12, no. 8 (2013): 45–51. http://dx.doi.org/10.32964/tj12.8.45.

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A method was developed to estimate the composition of deinked pulp or recovered paper in termsof hardwood kraft pulp, softwood kraft pulp, and mechanical pulp through analysis of the sugar units in hemicellulosesand pectins. Different pulps (i.e., bleached chemical pulp from hardwoods and softwoods and mechanical pulp) were obtainednfrom different mills. The pulps were mixed in different proportions and dried. The content of arabinose, xylose, mannose, galactose, rhamnose, galacturonic acid, and 4-O-methyl-glucuronic acid, sugar units in hemicelluloses and pectins in the different pulps and in

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16

Qian, Xueren, Jing Shen, Gang Yu, and Xianhu An. "Influence of pulp fiber substrate on conductivity of polyaniline-coated conductive paper prepared by in-situ polymerization." BioResources 5, no. 2 (2010): 899–907. http://dx.doi.org/10.15376/biores.5.2.899-907.

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The influences of pulp type, content of acidic groups (i.e., sulfonic and carboxylic groups) in CTMP, kappa number (i.e., residual lignin content) of unbleached kraft pulp, and beating degree of bleached kraft pulp on the conductivity of polyaniline (PAn)-coated conductive paper were investigated. The amounts of PAn coated on chemical pulps were higher than those coated on high yield pulps, and the surface resistivities of conductive papers prepared from chemical pulps were lower than those prepared from high yield pulps. As the substrates for the production of PAn-coated conductive paper, ble

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17

Mayr, Melanie, Nora Odabas, Rene Eckhart, Ute Henniges, and Wolfgang Bauer. "Cationization of lignocellulose as a means to enhance paper strength properties." BioResources 12, no. 4 (2017): 9338–47. http://dx.doi.org/10.15376/biores.12.4.9338-9347.

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Chemical modification by attaching functional groups to lignocellulosic pulp fibers might be a strategy for improving the pulp, and thereby, paper properties. Several studies have described positive effects on paper strength properties for handsheets prepared from cationic-modified pulp or pulp fractions. This study addressed whether these effects are related to the cationic groups, e.g., by increasing electrostatic attraction and thus paper strength, or rather side effects of the chemical modification process, e.g., fiber flexibilization. To eliminate or at least minimize these side effects,

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18

Joelsson, Tove, Gunilla Pettersson, Sven Norgren, Anna Svedberg, Hans Höglund, and Per Engstrand. "High strength paper from high yield pulps by means of hot-pressing." Nordic Pulp & Paper Research Journal 35, no. 2 (2020): 195–204. http://dx.doi.org/10.1515/npprj-2019-0087.

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AbstractThe hypothesis is that it should be possible to modify papermaking conditions in line with the softening properties of high yield pulp fibres and achieve similar strength properties to conventional chemical pulp based paper. We therefore investigated the rheological and physical properties of high yield pulp based papers during hot-pressing. Our results confirm that increased temperature combined with sufficient pressure enables permanent densification by softening of lignin, producing very high tensile strength. This treatment also significantly improved the wet tensile strength in co

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19

Choi, Kyoung-Hwa, Ah Ram Kim, and Byoung-Uk Cho. "Manufacture of high bulk paper using alkali swollen kraft pulp." Nordic Pulp & Paper Research Journal 33, no. 3 (2018): 503–11. http://dx.doi.org/10.1515/npprj-2018-3059.

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Abstract Effects of alkali swelling of kraft pulp fibers and the order of alkali swelling and beating treatments on paper bulk and paper strength were evaluated in terms of NaOH concentration in order to produce high bulk sheet (i. e., high porous and low density sheet). Effects of replacement of part of furnish with the alkali swollen pulp on paper properties were also investigated. It was found that alkali swelling of pulp fiber can increase the bulk of handsheet. NaOH concentration and beating treatment influenced paper bulk and paper strength. Alkali swollen pulp without beating showed the

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20

Zhao, Shu Lei, Zheng Yuan Wei, Xiao Tian Ding, and Qiang Lin. "The Impact of Drying Methods on Paper Physical Properties." Advanced Materials Research 602-604 (December 2012): 2267–72. http://dx.doi.org/10.4028/www.scientific.net/amr.602-604.2267.

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This paper experimentally examined the impact of four different drying methods (free drying, press drying, vacuum drying and impingement drying) on paper physical properties including roughness, elongation, air permeance, tearing resistance, tensile index and bursting strength. The handsheets materials are HWBKP (Hardwood Bleached Chemical Pulp), SWBKP (Softwood Bleached Chemical Pulp), CTMP (Chemical Thermo mechanical Pulp) and ATMP (Advanced Thermo Mechanical Pulp). Good experimental data were obtained for the four pulps under different drying conditions. The results of our investigation ind

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21

Borges, Maria Tereza, Claudio Mudado Silva, Jorge Luiz Colodette, Rubens Chaves de Oliveira, and Flavio Tesser. "Enzymatic bleaching of eucalyptus kraft pulp: effects on the prebleaching filtrate, pulp quality and paper properties." Holzforschung 67, no. 2 (2013): 147–53. http://dx.doi.org/10.1515/hf-2011-0130.

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Abstract Enzymatic bleaching appears to be a promising approach for clean bleaching processes and the reduction of bleaching chemical consumption. In this work, the quality of the filtrates and the pulps has been characterized after enzymatic prebleaching stages of eucalyptus kraft pulp. Four different conditions with xylanase were investigated. Following each prebleaching stage, the properties of the pulp [kappa number, brightness, content of hexenuronic acid (HexA), xylan removal, and pulp yield lost], and of the resulting effluents (chemical oxygen demand (COD), biochemical oxygen demand (B

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22

Utkarsh Nandeshwar, Rasika Ukunde, and Dr. Swarda Mote. "Sustainable Solution Economically for The Production of Paper Pulp from Peanut Shell." international journal of engineering technology and management sciences 8, no. 3 (2024): 59–69. http://dx.doi.org/10.46647/ijetms.2024.v08i03.008.

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The increasing demand for sustainable and eco- friendly materials has prompted researchers to explore alternative sources for paper pulp production. This research paper investigates the feasibility of utilizing peanut shells, an abundant agricultural waste, as a potential raw material for paper pulp production. The study focuses on the process of converting peanut shells into high-quality pulp through various methods such as chemical and mechanical pulping. The paper further discusses the potential benefits, challenges, and environmental implications of using peanut shell pulp as a sustainable

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23

Koray Gülsoy, Sezgin, and Saffet Uysal. "Effects of Recycled Fiber Fines on Hand Sheet Properties of Different Unbeaten and Beaten Pulps." Drvna industrija 71, no. 4 (2020): 327–37. http://dx.doi.org/10.5552/drvind.2020.1904.

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In this study, 5, 10, and 15 % secondary fines of recycled pulp were added to unbeaten and beaten (28 ºSR) samples of recycled pulp, Turkish Calabrian pine (Pinus brutia Ten.) kraft pulp, and European aspen (Populus tremula L.) kraft pulp. The effects of the addition of fiber fines on hand sheets properties were evaluated. The addition of fiber fines to the unbeaten pulps improved the strength properties of hand sheets. The roughness of hand sheets was also decreased with the addition of fines. When fiber fines were added to the beaten pulps, the type of pulp strongly affected the paper streng

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24

Hassan, Mohammad L., Wafaa S. Abou-Elseoud, Amal H. Abdel Kader, and Enas A. Hassan. "Rice straw paper sheets reinforced with bleached or unbleached nanofibers." Nordic Pulp & Paper Research Journal 36, no. 1 (2021): 139–48. http://dx.doi.org/10.1515/npprj-2020-0073.

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Abstract Cellulose nanofibers isolated from unbleached pulp are characterized by different surface properties due to presence of lignin at their surface, in addition to lower cost than isolated from bleached pulp. In the current work, the effect of cellulose nanofibers isolated from unbleached neutral sulfite and bleached soda rice straw pulps (so called UBCNF and BCNF) on improving paper sheet properties of unbleached and bleached rice straw pulp (so called UBP and BP) was studied. The effect on mechanical properties (tensile strength, burst strength, and tearing resistance) and physical prop

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25

RAHMAN, M. MOSTAFIZUR, MD MINHAJUL ISLAM, TASLIMA FERDOUS, M. NAKIB HOSSEN, and M. SARWAR JAHAN. "FRACTIONATION OF OLD CORRUGATED CONTAINERS FOR MANUFACTURE OF TEST LINER AND FLUTING PAPER." Cellulose Chemistry and Technology 58, no. 1-2 (2024): 163–68. http://dx.doi.org/10.35812/cellulosechemtechnol.2024.58.16.

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Old corrugated container (OCC) pulp was fractionated and it was found that the longer fiber fraction represented 76.54% and the short fiber fraction – 21.3% of the OCC pulp. The fiber length was 1.22 mm for the long fiber fraction and 0.6 mm for the short fiber, which was longer and shorter, respectively, than the fiber length of the whole OCC pulp (0.95 mm). In addition to fibers in pulp, the cellulosic microparticles that pass through a mesh screen or a perforated plate with a hole diameter of 76 μm, called fines, also have an impact on the properties of the final paper product. The fines co

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ÇİÇEKLER, MUSTAFA. ""EFFECTS OF DIFFERENT RATIOS OF STARCH-CONTAINING AKD ON PAPER PROPERTIES IN INTERNAL SIZING OF VARIOUS PULP TYPES "." Cellulose Chemistry and Technology 56, no. 9-10 (2022): 1031–47. http://dx.doi.org/10.35812/cellulosechemtechnol.2022.56.92.

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The main objective of this study is to determine the effects of different ratios of starch-containing AKD emulsion in various pulp types sizing processes on paper properties. A secondary objective of the study is to evaluate the influences of starch content in AKD emulsion and AKD dosage applied to pulps. Three different pulp types were sized: unbleached kraft, bleached kraft and chemithermomechanical pulps. In preparation of AKD emulsions, three different ratios of starch were used. AKD was applied to all pulps under the same conditions at four different dosages based on oven-dried fiber weig

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27

Chandranupap, Pravitra, Panitnad Chandranupap, and Pantharee Kongsat. "Washing Deinking of Mixed Office Wastepaper As a New Resource for Electrical Purposed Paper." Advanced Materials Research 287-290 (July 2011): 3024–27. http://dx.doi.org/10.4028/www.scientific.net/amr.287-290.3024.

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In present time, recycled paper from xerographic and laser-printed wastepaper plays an important role as alternatives to paper from virgin pulp because of there good pulp quality and high amount of wastepaper each year. This type of paper is classified as Mixed Office Wastepaper (MOW). The xerographic and laser-printed inks are usually called “toner” that mainly consists of styrene-acrylate copolymer. This work investigated paper recycling by washing deinking processes. Experimental parameters were pulp consistencies, amounts and types of surfactant. The resultant pulp of 1.5%consistency and 0

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28

Ochola, Charles, and Horace Keith Moo-Young. "Pulp and Paper." Water Environment Research 77, no. 6 (2005): 1928–79. http://dx.doi.org/10.2175/106143005x54524.

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Ochola, Charles, and H. Keith Moo-Young. "Pulp and Paper." Water Environment Research 78, no. 10 (2006): 1717–32. http://dx.doi.org/10.2175/106143006x119387.

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Sithole, B. Bruce. "Pulp and Paper." Analytical Chemistry 67, no. 12 (1995): 87–95. http://dx.doi.org/10.1021/ac00108a006.

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Moral, Ana, Elena Cabeza, Roberto Aguado, and Antonio Tijero. "NIRS Characterization of Paper Pulps to Predict Kappa Number." Journal of Spectroscopy 2015 (2015): 1–6. http://dx.doi.org/10.1155/2015/104609.

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Rice is one of the most abundant food crops in the world and its straw stands as an important source of fibres both from an economic and an environmental point of view. Pulp characterization is of special relevance in works involving alternative raw materials, since pulp properties are closely linked to the quality of the final product. One of the analytical techniques that can be used in pulp characterization is near-infrared spectroscopy (NIRS). The use of NIRS has economic and technical advantages over conventional techniques. This paper aims to discuss the convenience of using NIRS to pred

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SHARMA, ARVIND, GUNJAN DHIMAN, PRITI S. LAL, RAVI D. GODIYAL, and BIPIN P. THAPLIYAL. "CHARACTERISATION OF MORINGA OLEIFERA (DRUMSTICK) WOOD FOR PULP AND PAPER MAKING." Cellulose Chemistry and Technology 55, no. 3-4 (2021): 255–62. http://dx.doi.org/10.35812/cellulosechemtechnol.2021.55.25.

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"Moringa oleifera (drumstick) wood was evaluated in terms of its chemical composition, morphological features, Kraft pulping behavior, ECF bleaching and mechanical strength properties – important parameters for pulp and paper making – in comparison with Acacia mangium. Moringa oleifera was found to have the following composition: holocellulose 65.5%, lignin 20.5%, pentosan 11.6%, -cellulose 40.5% and extractives content of 5.15%, which made it comparable with the Acacia mangium wood sample. The alkali prehydrolysis of Moringa oleifera was carried out using 2% NaOH at 150 °C. The prehydrolysis

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33

Yang, Fei, Yanli Li, Yang Zhang, and Yucheng Feng. "Impact of mechanical refining on the heat tolerance of cellulosic paper." BioResources 13, no. 3 (2018): 6746–56. http://dx.doi.org/10.15376/biores.13.3.6746-6756.

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Cellulosic paper is widely used in various applications, such as for decoration and in cold-rolled stainless steel. The thermal stabilities of cellulosic fibers were investigated with a thermogravimetric analyzer. Additionally, the impact of mechanical refining on the heat resistance of cellulosic paper was evaluated by testing the tensile strength and brightness of the samples derived from pulp with various beating degrees. The morphology of the paper was characterized with scanning electron microscopy and the monose content of the pulp samples was determined with high performance liquid chro

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34

Tayeb, Seyed Ali Haji Mirza, A. Jahan Latibari, A. Tajdini, and S. M. J. Sepidehdam. "The influence of pulp refining on de-inking potential and strength properties of ink jet printed paper." BioResources 7, no. 3 (2012): 3837–46. http://dx.doi.org/10.15376/biores.7.3.3837-3846.

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The effect of laboratory refining on de-inking potential of inkjet printed handsheets was investigated. Pulp samples containing 80% short fiber and 20% long fiber were beaten in a PFI mill to reach four predetermined freeness levels of 650 (unrefined), 550, 430, and 340 mL CSF, and then handsheets were made. Handsheets were identically inkjet printed and then de-inked. Results revealed that, at lower freeness value, the brightness of de-inked pulps was higher, but the opacity decreased. The surface roughness of handsheets produced using different refined pulp before de-inking was reduced. Our

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35

Khan Z, Md Shoaib, Monica Denise R., Gladstone Christopher Jayakumar, and Swarna V. Kanth. "Preparation of Paper from Chrome Shavings." Journal of the American Leather Chemists Association 120, no. 4 (2025): 163–70. https://doi.org/10.34314/ztzv2y35.

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Globally, the leather industry generates a vast amount of chrome shavings annually. Repurposing this abundant waste material in paper manufacturing presents economic and environmental benefits. Paper manufacturing predominantly relies on wood pulp as the primary raw material. Incorporating pulp derived from lingo-cellulosic fibers is widely recognized and valued within the paper industry. The present work has attempted to evaluate the suitability of chrome shavings to be used in combination with wood pulp in paper making. The chrome shavings were dechromed and transformed into pulp as dechrome

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36

Liang, Xiaoli, Yanpeng Xu, Liang Yin, et al. "Sustainable Utilization of Pulp and Paper Wastewater." Water 15, no. 23 (2023): 4135. http://dx.doi.org/10.3390/w15234135.

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The pulp and paper industry plays an important role in the global economy and is inextricably linked to human life. Due to its large scale, the production process generates a large amount of wastewater, which poses a major threat to the environment. The sustainable utilization and safe treatment of pulp and paper wastewater can effectively reduce environmental pollution, improve resource utilization efficiency, protect water resources, provide economic benefits for pulp and paper enterprises, and thus promote the green and sustainable development of the pulp and paper industry. Therefore, this

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Çiçekler, Mustafa, Ayşe Özdemir, and Ahmet Tutuş. "Characterization of Pulp and Paper Properties Produced from Okra (Abelmoschus esculentus) Stalks." Drvna industrija 73, no. 4 (2022): 423–30. http://dx.doi.org/10.5552/drvind.2022.2131.

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In this study, the usability of okra (Abelmoschus esculentus) stalks in pulp and paper production was investigated. Firstly, chemical components and fiber morphological properties were determined to investigate the suitability of okra stalks for pulp and paper production. Holocellulose, cellulose and lignin contents were found as 76.1 %, 46.4 % and 16.0 %, respectively and the fiber length, fiber width and cell wall thickness were measured as 0.64 mm, 16.97 μm and 3.66 μm, respectively. According to these data, it has been determined that okra stalks are suitable for pulp and paper production.

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CONNELL, DANIEL, PIA JOUR, KATARINA GUTKE, and DOUG REID. "The contribution of pulp brightness and optical brightening agents to paper whiteness." March 2014 13, no. 3 (2014): 43–52. http://dx.doi.org/10.32964/tj13.43.

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The desired optical properties of a paper can be achieved through a variety of tools: pulp brightness, optical brightening agents, dyes, or fillers. In this work, we explore the interaction between pulp brightness levels and optical brightening agents (OBA) addition on paper whiteness. Conditions were chosen that approximate an uncoated freesheet grade. Papers were prepared using eucalyptus kraft pulps bleached to three different brightness levels. A constant filler level and optimized retention chemistry were used in the preparation. The addition of OBA was evaluated as a wet end only applica

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BAJPAI, PRATIMA, SHREE P. MISHRA, OM P. MISHRA, SANJAY KUMAR, and PRAMOD K. BAJPA. "Use of enzymes for reduction in refining energy - laboratory." TAPPI Journal 5, no. 11 (2006): 25–32. https://doi.org/10.32964/tj5.11.25.

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We performed laboratory and process-scale studies with mixtures of cellulase and hemicellulase enzymes for reducing the refining/beating energy requirement of different types of pulp. Those included hardwood kraft pulp, long fiber fraction of bamboo pulp, old corrugated containers (OCC), and mixed pulp containing new double-lined kraft cuttings (NDLKC) and long fiber fraction of bamboo pulp. In the laboratory, the refining energies were reduced by 18%-45% for different pulps with these enzymes. The strength properties of pulps were not affected by enzyme treatment. In the process-scale trials,

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JOELSSON, TOVE, GUNILLA PETTERSSON, SVEN NORGREN, ANNA SVEDBERG, HANS HOGLUND, and PER ENGSTRAND. "Improving paper wet strength via increased lignin content and hot-pressing temperature." October 2020 19, no. 10 (2020): 487–97. http://dx.doi.org/10.32964/tj19.10.487.

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It is known that the strength properties of wood-based paper materials can be enhanced via hot-pressing techniques. Today, there is a desire not only for a change from fossil-based packaging materials to new sustainable bio-based materials, but also for more effective and eco-friendly solutions for improving the dry and wet strength of paper and board. Against this background, hot pressing of paper made from high yield pulp (HYP), rich in lignin, becomes highly interesting. This study investigated the influence of pressing temperature and native lignin content on the properties of paper produc

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Pradipasena, Pasawadee, Rungsima Chollakup, and Sumate Tantratian. "Formation and characterization of BC and BC-paper pulp films for packaging application." Journal of Thermoplastic Composite Materials 31, no. 4 (2017): 500–513. http://dx.doi.org/10.1177/0892705717712633.

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It was found beneficial to manufacture bacterial cellulose (BC) obtained from waste food sources to create value-added packaging products by firstly performing purification and disintegration processing of the BC and then reinforcing it with paper pulp. The purification treatment involved using sodium hydroxide (2% w/v at 100°C for 1 h) on BC pulp to remove the bacterial protein and the resulting cultured medium film was characterized with respect to its physical properties. An acid treatment on the purified BC pulp was applied to disintegrate cellulose network before forming a film. The resul

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Azizi Mossello, Ahmad, Jalaluddin Harun, Hossein Resalati, Rushdan Ibrahim, Seyeed Rashid Fallah Shmas, and Paridah Md Tahir. "New approach to use of kenaf for paper and paperboard production." BioResources 5, no. 4 (2010): 2112–22. http://dx.doi.org/10.15376/biores.5.4.2112-2122.

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This study sought to determine the suitability of fractionation and consequence-selective processing (separation of long fiber and short fiber, beating long fiber, and remixing with short fiber to target freeness) as a new approach to use of kenaf whole stem pulp for paper and paper-board production. A laboratory Bauer-McNett Classifier with screen 18 mesh was used to separate short fibers and long fibers of the unbeaten kenaf whole stem soda-anthraquinone high kappa and low kappa pulps. For comparison, the initial unbeaten pulps were beaten in the PFI mill to the same freeness (300 mL CSF). R

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BHARDWAJ, NISHI K. "UPGRADING OF PAPER FROM MIXED OFFICE WASTE PAPER PULP BY BLENDING WITH VIRGIN SOFTWOOD KRAFT PULP FOR TROPICAL CONDITIONS." Cellulose Chemistry and Technology 59, no. 3-4 (2025): 331–39. https://doi.org/10.35812/cellulosechemtechnol.2025.59.29.

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Pulp blending, one of the methods for restoring the strength of secondary fibres, is the focus of this study, utilizing virgin softwood kraft pulp as the strength enhancing material. A series of blending experiments were conducted by adding 0 to 25% virgin pulp, with varying freeness levels (610-320 CSF), to mixed office waste (MOW) pulp to produce high-quality paper. The physical and mechanical strength properties of the paper, including density, tensile, burst, and tear strengths, were measured. The strength of various pulp blends increased significantly compared to MOW pulp, and pulp draina

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Hänninen, Tuomas, Eero Kontturi, Kirsi Leppänen, Ritva Serimaa, and Tapani Vuorinen. "Kraft pulping of Juniperus communis results in paper with unusually high elasticity." BioResources 6, no. 4 (2011): 3824–35. http://dx.doi.org/10.15376/biores.6.4.3824-3835.

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Juniper (Juniperus communis) is a slowly growing softwood species that has unusually high elasticity. To demonstrate the utilization of the material properties of juniper, conventional kraft pulping was used to prepare juniper pulp, whose handsheet and fiber properties were subsequently analyzed. A large number of uncooked fiber bundles remained after pulping, the screened yield was low, and kappa number high. Also the viscosity value of juniper pulp was lower than that of common industrial softwood pulps, due to the harsh pulping conditions required. Juniper fibres had thicker cell walls, sma

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Fahmy, Tamer Y. A., Fardous Mobarak, Nesrine Kassem, and Amal H. Abdel-Kader. "New approach for upgrading pulp & paper quality: Mild potassium permanganate treatment of already bleached pulps." Carbohydrate Polymers 74, no. 4 (2008): 892–94. https://doi.org/10.1016/j.carbpol.2008.05.008.

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The present work introduces mild – room temperature – potassium permanganate treatment of cellulosic materials, namely already bleached pulps. Such treatment represents a new approach for upgrading pulp and paper quality, which is lacking in the literature. Potassium permanganate was investigated as a purifying and mild oxidizing agent for commercial already bleached softwood and bagasse pulps. It was found that treatment of the bleached beaten pulps, with 0.25–2% KMnO4 (based on pulp weight), led to significant improvement in paper properties. The strength (breaking length) increased greatly

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Barbosa, Bianca Moreira, Alessandro Guarino Lino, Bruno de Freitas Homem de Faria, et al. "Addition of corn fiber xylan to eucalyptus and pinus pulp and its effect on pulp bleachability and strength." Nordic Pulp & Paper Research Journal 33, no. 3 (2018): 414–19. http://dx.doi.org/10.1515/npprj-2018-3060.

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AbstractCorn fibers are a significant residue of agriculture due to the huge amounts, which has fueled interest in a more rational use of its components, particularly regarding hemicelluloses. The impact of hemicellulose redeposition on printer and writing (P&W) paper grade pulp properties are discussed in this paper. Xylans extracted from corn fibers (16.9 % xylans) by cold caustic extraction (CCE) were added to commercial brown pulps (eucalypt and pine) in the oxygen delignification (O-stage) and further bleached to 90 % ISO brightness. Hemicelluloses deposition occurred at variable degr

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Gultom, Erdiana, Hestina Hestina, Nova Florentina, and Barita Aritonang. "Paper making and characterization from waste coconut and tofu dregs." Jurnal Pendidikan Kimia 13, no. 2 (2021): 159–71. http://dx.doi.org/10.24114/jpkim.v13i2.27028.

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Research on paper made from coconut and tofu waste has been carried out using the alkalization method of separation technique, with the optimum composition as follows: NaOH concentration used is 3.0% and cooking temperature is 100 0C and the time required is 90 minutes. The results of the catheterization test of paper made from coconut dregs and tofu have a water content of 3.2%; pH 6.9, pulp content 65.75%; cellulose content 80.22%; lignin content 18.27%. The results of the FT-IR spectrum analysis of coconut pulp and tofu pulp are suitable for use as raw materials for making paper because the

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Wu, Xiu Fu, and Fu Ting Wang. "Paper Pulp Molding Products Structural Design." Advanced Materials Research 580 (October 2012): 383–86. http://dx.doi.org/10.4028/www.scientific.net/amr.580.383.

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Paper pulp molding products meet the product-protecting requirements and operating requirements through all kinds of structural forms in the application of product packaging, fixation and product buffering shockproof. Paper pulp molding products structural design influences the buffering performance of paper pulp molding products and packaging requirements of the products, therefore influences the packaging structure, processing production, mold design and processing method of paper pulp molding products.

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Neiva, Duarte M., Maria C. Godinho, Rogério M. S. Simões, and Jorge Gominho. "Encouraging Invasive Acacia Control Strategies by Repurposing Their Wood Biomass Waste for Pulp and Paper Production." Forests 15, no. 5 (2024): 822. http://dx.doi.org/10.3390/f15050822.

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Concerns on the expanding infestation of several Acacia species in the southern Mediterranean European countries have triggered an ever-growing requirement for costly targeted control actions. Valorizing biomass waste produced could help promote and better finance these actions. For that purpose, wood wastes from invasive control actions were tested regarding their pulp and paper potential, aiming to entice cellulose industries to partake in future conservation actions. Wood waste from the five most pervasive Acacia species was studied (Acacia dealbata Link, Acacia longifolia Willd, Acacia mea

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Tozluoğlu, Ayhan, Hakan Fidan, Ahmet Tutuş, et al. "Reinforcement potential of modified nanofibrillated cellulose in recycled paper production." BioResources 16, no. 1 (2020): 911–41. http://dx.doi.org/10.15376/biores.16.1.911-941.

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The influence of nanofibrillated cellulose (NFC) was investigated as a reinforcing agent to improve strength properties of papersheets fabricated from recycled pulp fibers of mixtures of old newspapers, old magazines, and old corrugated cardboards. To determine the effects of the NFC on the mechanical and physical properties of the recycled pulp papers, cellulose nanofibrils (NFC) were isolated from wheat straw, pretreated chemically and enzymatically (NFC-OX), and then added to the bulk suspensions of papermaking pulp slurries at various percentages. The electrokinetic and drainage properties

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