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Dissertations / Theses on the topic 'Blown film'

Author: Grafiati

Published: 4 June 2021

Last updated: 9 February 2022

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1

Strater, Kurt F. "Countercurrent cooling of blown film." Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=66003.

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2

Majumder, Khokan Kanti, and khokankanti@yahoo com. "Blown Film Extrusion: Experimental, Modelling and Numerical Study." RMIT University. Civil, Environmental and Chemical Engineering, 2008. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20080509.161859.

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Abstract This thesis correlates rheological data into a non-linear blown film model that describes the stress and cooling-induced morphological transformations in the axial and flow profiles of the blown films. This will help to improve the physical and mechanical properties of the films in a cost effective way, which will in turn be of great benefit to the food and packaging industries. In this research, experimental and numerical studies of a blown film extrusion were carried out using two different low-density polyethylenes (LDPEs). In the experiment, the key parameters measure

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3

Godshall, David Leonard. "Investigations of Structure–Property Relationships in Semicrystalline Thermoplastic Polymers: Blown Polyethylene Films and Polyacrylonitrile Copolymers." Diss., Virginia Tech, 2002. http://hdl.handle.net/10919/25971.

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Blown films of high molecular weight high density polyethylene (HMW-HDPE) were produced from two resins of differing molecular weight (MW) and molecular weight distribution (MWD) using a high stalk bubble configuration. The processing conditions were varied such that three film gauges, each fabricated at three frost line heights (FLH), were produced. Crystalline orientation and tear resistance properties of the films were measured. Under appropriate conditions, the formation of two populations of lamellar stacks with their surface normals orthogonal to one another were observed. Increasing

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4

Gururajan, Giriprasath. "Real-time Raman spectroscopy and wide-angle x-ray diffraction during single-layer and multi-layer blown film extrusion." Connect to this title online, 2008. http://etd.lib.clemson.edu/documents/1211388756/.

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5

Ivings, Krisandra. "Country Culture and Crossover: Narrative Representations of Gender and Genre Through Lyric, Music, Image, and Staging in Carrie Underwood's Blown Away Tour." Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/35252.

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This thesis examines the complex and multi-dimensional narratives presented in the work of mainstream female country artist Carrie Underwood, and how her blending of musical genres (pop, rock, and country) affects the narratives pertaining to gender and sexuality that are told through her musical texts. I interrogate the relationships between and among the domains of music, lyrics, images, and staging in Underwood’s live performances (Blown Away Tour: Live DVD) and related music videos in order to identify how these gendered narratives relate to genre, and more specifically, where these perfo

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6

Butterfield, Craig. "A novel laboratory dispersive and distributive minimixer and applications : development of a new minimixer that can duplicate mixing which occurs in a large twin screw extruder." Thesis, University of Bradford, 2009. http://hdl.handle.net/10454/4930.

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The mixing of additives into a plastic is an extremely important step in the plastics industry, necessary for the manufacture of almost every conceivable product. Therefore the costs in developing new products can prove very expensive as the testing is usually carried out using full scale machines, usually using twin screw extruders because they are able to provide good dispersive and distributive mixing. This is particularly important when compounding difficult to disperse additives and nano-additives. What is required is a machine that can replicate the mixing abilities of a twin-screw extru

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7

Arruda, Liliane Cardoso. "Efeitos do extensor de cadeia na morfologia, propriedades reológicas e mecânicas de filme tubular de blendas de poli(ácido) láctico) PLA com poli(butileno-adipato-co-tereftlalato) PBAT." Universidade Federal de Sergipe, 2015. https://ri.ufs.br/handle/riufs/3478.

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This study investigated the effect of chain extender epoxy based additive, Joncryl ADR 4368, on the rheological, thermal and mechanical properties of poly(lactic acid) with poly(butylene adipate-co-terephthalate) (PLA/PBAT) blends in the blown films form. Compositions with 40% and 60% by weight PLA were selected for production of such blown films. These dispersed phase content was chosen because the literature does not present mechanical behavior studies of tubular film blends with high concentration of the dispersed phase. Rheological analysis in dynamic oscillatory regime showed the reaction

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8

Tang, Zuojian 1967. "Surface morphology of polyethylene blown films." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=31072.

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The properties of blown polyethylene (PE) films depend on various factors, including crystallinity, morphology, and orientation, in addition to chemical composition. It has been shown that the optical properties are strongly influenced by surface morphology. In this project, we use non-contact atomic force microscopy (AFM) and polarized light microscopy (PLM) to visualize surface and bulk morphology. Various techniques, such as surface and line roughness, surface and line fractal dimension, pair-correlation function and nearest neighbor distance distribution function, are employed to quantify

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9

Wang, Lei 1972. "Morphology and optical properties of polyolefin blown films." Thesis, McGill University, 1999. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=36728.

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Optical properties of polyethylene blown films are of great commercial and scientific interest. An understanding of the relationship between morphology and optical properties will have a significant impact on product and process optimization.<br>In this work, a number of linear low density polyethylene (LLDPE) resins of different molecular and structural characteristics were studied. Intrinsic properties such as refractive index and absorption coefficient were estimated from resin compositions using group contribution models. The refractive indices of sample films were also measured using the

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10

Wang, Lei. "Morphology and optical properties of polyolefin blown films." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0029/NQ64689.pdf.

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11

BAFNA, AYUSH ASHOK. "OPTICAL PROPERTIES AND ORIENTATION IN POLYETHYLENE BLOWN FILMS." University of Cincinnati / OhioLINK, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1005857011.

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12

Walha, Fatma. "Elaboration de mélanges à base de Bio-polymères : Etude des corrélations entre structure, propriétés et transformation." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEI075.

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Cette étude est une contribution à la mise au point d’un nouveau matériau filmogène multiphasique, originaire de ressources naturelles et destiné à l’emballage alimentaire. La voie proposée consiste à élaborer un mélange poly (acide lactique) [PLA]/ polyamide 11 [PA11] à différentes compositions; le principal avantage étant d’offrir un éventail de propriétés difficile à réunir sur un même polymère. Les différentes formulations, PLA/PA11, élaborées à l’état fondu dans une extrudeuse bivis ont été étudiés du point de vue des propriétés rhéologiques, thermique, mécanique et de la morphologie. Dif

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13

Belyamani, Imane. "Développement d'un matériau thermoplastique biodégradable et hydrosoluble à base d'une protéine du lait." Phd thesis, Université Jean Monnet - Saint-Etienne, 2011. http://tel.archives-ouvertes.fr/tel-00702749.

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La biomasse représente l'une des principales alternatives à l'utilisation du pétrole dans la plasturgie. Grâce à leurs propriétés fonctionnelles, les caséinates sont une matière première prometteuse pour la fabrication de films plastiques pour des applications dans l'emballage biodégradable et hydrosoluble. La transformation du caséinate de sodium par les techniques habituellement utilisées dans la plasturgie a été démontrée. Des extrudats de caséinate plastifié au glycérol ont été obtenus au moyen d'une extrudeuse bi-vis corotative. La caractérisation physico-chimique du matériau obtenu a con

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14

Žukauskas, Petras. "„Koncept-dizaino” plano parengimas įdiegiant „Blow-Fill-Seal” aseptinę technologiją akių lašams gaminti." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20140630_134849-50340.

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Darbo tikslas: Išsiaiškinti „Blow-Fill-Seal” technologijos pritaikymo galimybes gaminant akių lašus, sukurti koncepcinį planą įtraukiant patalpų išplanavimą ir galimą sąmatą. Darbo uždaviniai: 1. Pateikti gamybinės linijos proceso pasiūlymą pritaikant technologiją; 2. Sudaryti patalpų planą pritaikant akių lašų gamybą, nurodyti medžiagų ir personalo judėjimą patalpose; 3. Pateikti siūlymus įrengiant švarias patalpas (architektūriniai, vandens tiekimo ir kt. sprendimai); 4. Pateikti technologinių įrengimų pasiūlymus, injekcinio vandens tiekimą; 5. Pateikti galimą projekto sąmatą. Tyrimo metodai

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15

Breese, David R. "Modeling the effects of solid state orientation on blown high molecular weight high density polyethylene films a composite theory approach /." Cincinnati, Ohio : University of Cincinnati, 2004. http://www.ohiolink.edu/etd/view.cgi?acc%5Fnum=ucin1107958634.

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16

BREESE, DAVID RYAN. "MODELING THE EFFECTS OF SOLID STATE ORIENTATION ON BLOWN HIGH MOLECULAR WEIGHT HIGH DENSITY POLYETHYLENE FILMS: A COMPOSITE THEORY APPROACH." University of Cincinnati / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1107958634.

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17

Tobe, Renée. "Mimesis and the dialogue between architecture and film, with particular reference to Joseph Losey's 'The Servant' and Michelangelo Antonioni's 'Blow-up'." Thesis, University of Cambridge, 2003. https://www.repository.cam.ac.uk/handle/1810/284026.

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18

Bermingham, Siobhan Clara. "The effect of processing parameters on the properties of blown films produced from blends of a low density and a butene based linear low density polyethylene." Thesis, Queen's University Belfast, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282120.

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19

Ben, Larbi Sami. "TALK TO ME, I AM LISTENING." VCU Scholars Compass, 2009. http://scholarscompass.vcu.edu/etd/2007.

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An introductory conversation with a new person I just met usually goes like this: So, where is your accent from ? Are you American? Well, yes, .....but no. Not really. I do have American citizenship and I lived in the US for fifteen years but I grew up in France. Ok, so you’re French? Well, yes, but .....not totally. My mother is French but my father is Tunisian. Ok, so you’re Tunisian? Well, yes, but... not wholly. I don’t speak Arabic, so I don’t totally feel Tunisian. So what are you? American? French? Tunisian? With my work, I ask the same questions. What is this? What does it do? How do I

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20

Luo, Dah-Woei, and 羅大偉. "Computer aided design of extrusion blown film die." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/23832717614982963083.

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碩士<br>國立交通大學<br>應用化學研究所<br>85<br>The blown film die , which is also called the spiral mandrel die , is widely used in the production of tubular products , such as pipes , plastic bags and so on . In order to produce the beautiful and durable products , helicalgrooves cut on the mandrel surface are designed to increase flow uniformity and eliminate welding lines . They are the main characteristics of the spiral mandrel die . There are six parameters in designing the spiral mandrel die , which are the diameter of the mandrel , the number of the helical groove , the initial width of

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21

WANG，CHIA-CHAN and 王家榐. "Development of Toughening and Blown Film of Polylactic Acid." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/7cw457.

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碩士<br>亞東技術學院<br>材料與纖維系應用科技碩士班<br>107<br>This study is divided into two parts to discuss, the first part: polylactic acid (PLA) toughening and upgrading. First, PBAT, PBS and PLA biodegradable plastics were mixed in different proportions to prepare PmCn and PLA1(PmCn)1 composite plastics. The thermal, mechanical, SEM type, film formation and heat resistance of the film were analyzed and discussed. The thermal properties show that the melting exothermic peak belonging to P disappeared in P1C4 plastic, P was dispersed in the main phase of C, and the other mixing ratios were found to be the meltin

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22

Tao, Wen-Yu, and 陶文鈺. "Optimal Design of Spiral Mandrel Die for Blown Film Process." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/28458438614523602582.

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碩士<br>國立交通大學<br>應用化學系<br>90<br>Spiral mandrel dies are widely used in the production of tubular products and polymeric films. The feature of the die is several helical grooves cut on the mandrel surface, and the melt flow from groove leak to clearance gradually. Proper die design can improve flow uniformity and to avoid occurring the weld line. Geometrical parameters in designing the spiral mandrel die are: diameter of the mandrel, the number of helical groove, initial width and initial depth of the helical groove, the groove helix angle, overlap of helical groove, the initial gap,

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23

Xie, Wei-Xian, and 謝維賢. "Optimal Design of Spiral Die for Metallocene Polyethylene Blown Film." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/18798002837631228667.

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碩士<br>國立交通大學<br>應用化學系<br>89<br>Metallocence polyethylene(m-PE) is a fully potential material with well mechanical properties. But the poor melt strength and high shear rate viscosity are disadvantages in polymer application. Mathematic model combined with Taguchi method is a method for optimal design of spiral mandrel die to avoid the poor melt strength and the overheat of melt. There are seven parameters in designing the spiral mandrel die, which are the diameter of the mandrel, the number of the helical groove, the initial width of the helical groove, the initial depth of the hel

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24

Chang, xein-min, and 張憲民. "Optimal Design of Spiral die for Physical Foaming and blown film extrusion Process." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/94313729520286970079.

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碩士<br>國立交通大學<br>應用化學系所<br>92<br>The purpose of the present study is to establish an analytical program for spiral die with physical foaming agent. First, we predict the viscosity of melt polymer with foaming agent mathematically, and establish the flow model by fluid dynamics. Applying the Sanchez-Lacombe equation, we can calculate the weight percentage of foaming agent in melt polymer at any pressure and temperature. As predicted, more foaming agent can be dissolved into melt polymer at a high pressure or low temperature. The parameters of spiral die include DEPTH, WCHAN, GIBC, HBC, NOSEC, θ

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25

蔡文淵. "Optimal Design of Side-Feed Spiral Mandrel Die for Blown Film Extrusion Process." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/39812762482349170024.

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碩士<br>國立交通大學<br>應用化學系所<br>93<br>Abstract Side-feed spiral mandrel die was designed to overcome the disadvantage of central-feed spiral mandrel die. The production rate can be improved and the possibility of forming the poor surface appearance and the warp problem can also be avoided using this type of die. Especially, the possibility of material degradation, which causes the decrease of mechanical properties, can be eliminated via this type of die when the layers of film increase. In addition, this type of die possesses the characteristics of small metal body, which results in a decrease of di

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26

吳祐任. "Optimal disign of side-feed spiral mandrel die for the blown film extrussion process." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/09197149086822723722.

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27

Ohlendorf, Friedrich [Verfasser]. "Vorhersage der mechanischen Folieneigenschaften bei der Schlauchfolienextrusion = Predicting the mechanical film properties in blown film extrusion / vorgelegt von Friedrich Ohlendorf." 2004. http://d-nb.info/971334374/34.

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28

Lin, Chin-Tai, and 林錦泰. "The Study of The Effect of The Surface Roughness on Physical Properties for a Blown Film Product." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/15531267795812399958.

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碩士<br>國立中正大學<br>化學工程研究所<br>93<br>The extrusion blown film process is widely used and well developed technology in making thin-film products for industrial and packaging applications. Compared to the flat-die process, thicker, wider HDPE geomembrane products manufactured by the blown film (Round-Die) process a lower investment and flexible production issues. The HDPE resins used for the geomembrane production in a blown film process should have a higher molecular weight to provide the required melt strength, and bubble stability . A narrow molecular weight distribution (MWD) is needed for pr

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29

Xu, Zhen-Peng, and 許振鵬. "Flow simulation in blow-film die." Thesis, 1990. http://ndltd.ncl.edu.tw/handle/08912594264559212384.

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30

YUAN, CHIANG TING, and 姜丁元. "Investigation of the oxygen barrier properties of blown films of modified polyamide/nylon clay and modified polyamide/ethylene vinyl alcohol blends." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/04595395444276827623.

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31

Metz, Daniel Curran. "Prestige and prurience : the decline of the American art house and the emergence of sexploitation, 1957-1972." Thesis, 2010. http://hdl.handle.net/2152/ETD-UT-2010-05-1383.

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“Prestige and Prurience: The Decline of the American Art House and the Emergence of Sexploitation, 1957-1972” presents a historical narrative of the art house theatre during the 1960s and its surrounding years, examining the ways in which art theatres transformed into adult theatres during the 1960s and 1970s. Beginning in earnest in the immediate post-war period, art houses in America experienced a short period of growth before stagnating in the middle 1950s. With the release in 1957 of the erotically charged Brigitte Bardot film …And God Created Woman, a new era of art houses followed, one

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