Results 181 to 190 of about 1,532,171 (223)
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Experimental Research on the Blown Film Extrusion Process of Polyethylene
Journal of Plastic Film and Sheeting, 2001Experimental studies of the blown film extrusion process presented in this paper aim at examining the influence of selected properties of constructional elements of intensive shearing and mixing on the characteristic of this process. The analysis concerned especially the influence of the thickness of the research gap between the inner surface of ...
Janusz W. Sikora
exaly +2 more sources
Tensile Properties of Extruded Zein Sheets and Extrusion Blown Films
Macromolecular Materials and Engineering, 2003 AbstractZein‐based plastic sheets and films were formed by extrusion through a slit‐die or blowing head. Zein was plasticized with oleic acid and formed into a wet moldable mass (resin) to feed the extruders. Both single‐ and twin‐screw extruded sheets showed higher elongation at break, lower tensile strength, and lower Young's Modulus than non ...
Graciela W Padua
exaly +2 more sources
Dynamic modeling of blown‐film extrusion
Polymer Engineering & Science, 2003Abstract Past dynamic studies of blown‐film extrusion have been confined to the stability analysis of the linearized equations. The full set of nonlinear equations comprises a system of partial differential and algebraic equations with boundary conditions that vary from author to author.
J. Carl Pirkle, Richard D. Braatz
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Stability of a Blown Film Extrusion Process
International Polymer Processing, 1999Abstract The stability of a blown film extrusion process has been investigated using a simple isothermal Newtonian model. Although the Newtonian model may be an oversimplification for polymer melts, it serves as a reasonable first approximation for linear polymers (e.g., linear low density polyethylene) in extensional flow situations ...
K.-S. Yoon, C.-W. Park
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Production and characterization of sodium caseinate edible films made by blown-film extrusion
Journal of Food Engineering, 2014Caseinates are considered as an interesting raw material for making biodegradable and water-soluble packaging. However, the development of plasticized caseinates, especially sodium caseinate, has mainly focused on the formation of films obtained by solution casting.
Imane Belyamani, Frédéric Prochazka
exaly +3 more sources
Blown Film Extrusion Optimization-Control and Screws
Journal of Plastic Film & Sheeting, 1991On-line film gauging, gravimetric feeding, innovations in blown film dies and wind-up equipment, and improved data handling have made pos sible the production of blown film to higher quality standards. However, ade quate cost control and effective material utilization will require even greater uniformity of the process and property performance of the ...
E.W. Veazey, N. Barrera
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Blown Film Extrusion of Post-Consumer Recycled Lldpe Film
Journal of Plastic Film & Sheeting, 1993In this work, the properties of blown film made from post consumer recycled material were studied. Post-consumer recycled LLDPE film was blended with a virgin LLDPE resin at several levels in a twin-screw ex truder, and the melt index, storage modulus, and loss modulus of these blends were measured.
S.J. Hebert +2 more
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Optimized cooling and gauge tolerances in blown film extrusion
Polymer Engineering & Science, 1997AbstractNumerical calculations of the air flow and heat transport processes in film blowing have been made, considering the turbulence of the air flow. The parameters air mass flow, air temperature, air velocity, and angle‐of‐attack have been varied. The results have shown that the air massflow has the strongest influence on cooling in the processing ...
B. Feron, D. Wolf, J. Wortberg
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Blown Films and Ribbons Extrusion
, 2013 This chapter covers various aspects of polymer materials and/or their applications in specific end-products. The chapter includes, first, a general description of blown film and ribbon extrusion, including the most important parameters that need to be ...
Jorge Ramón Robledo-Ortíz +2 more
exaly +2 more sources
Studies on blown film extrusion. III. Bubble instability
Journal of Applied Polymer Science, 1975AbstractAn experimental study has been carried out to investigate flow instabilities in blown film extrusion. Two types of flow instabilities were observed, depending on whether a bubble was under uniaxial or biaxial stretching. Under biaxial stretching, the phenomenon of a surface wave‐type instability was observed, yielding wavy bubble shapes which ...
Chang Dae Han, Jong Yoo Park
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