Results 301 to 310 of about 178,590 (332)
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Investigation into the Cooling Characteristics of Blown Film Extrusion Lines
Journal of Reinforced Plastics and Composites, 1999To analyze and to optimize the cooling conditions at blown film extrusion lines, the cooling air stream has been determined by using a hot wire anemometer. The velocity and temperature profiles of the air stream and the air pressure along the bubble have been measured.
Jochen Hauck, Walter Michaeli
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High performance extrusion blown starch/polyvinyl alcohol/clay nanocomposite films
Food Hydrocolloids, 2018Abstract Starch/polyvinyl alcohol (PVA)/clay nanocomposite films with high mechanical and barrier properties were prepared by extrusion blowing. Based on the starch/clay matrix, the effects of PVA content on the starch/PVA/clay nanocomposite films were investigated. Appropriate preparation conditions were determined by the rheological behavior of the
Wentao Wang +6 more
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Journal of Plastic Film & Sheeting
Polymer processing aids (PPAs) reduce and/or eliminate sharkskin melt fracture (MF) instabilities in polyethylene extrusion. This is achieved by increasing the critical flow rate at which MF occurs thus resulting in increased extrusion rate, productivity,
Jeh-Chang Yang +3 more
semanticscholar +1 more source
Polymer processing aids (PPAs) reduce and/or eliminate sharkskin melt fracture (MF) instabilities in polyethylene extrusion. This is achieved by increasing the critical flow rate at which MF occurs thus resulting in increased extrusion rate, productivity,
Jeh-Chang Yang +3 more
semanticscholar +1 more source
Journal of Applied Polymer Science
In this study, a hybrid microsphere structure with a polyhexamethyleneguanidine hydrochloride (PHMG) core and a nano‐zinc oxide (Nano‐ZnO) antibacterial additive shell was designed through the reaction extrusion in polypropylene (PP).
Teng Ma +6 more
semanticscholar +1 more source
In this study, a hybrid microsphere structure with a polyhexamethyleneguanidine hydrochloride (PHMG) core and a nano‐zinc oxide (Nano‐ZnO) antibacterial additive shell was designed through the reaction extrusion in polypropylene (PP).
Teng Ma +6 more
semanticscholar +1 more source
Investigations of film thickness variations in blown film extrusion when using air guiding systems
, 2021The mass throughput and thus the productivity of a blown film line strongly depends on heat transfer from the film. Existing cooling systems are therefore constantly being further developed.
L. Kraus +3 more
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Studies on blown film extrusion. I. Experimental determination of elongational viscosity
Journal of Applied Polymer Science, 1975AbstractBlown‐film extrusion experiments were carried out to investigate the elongational flow behavior of viscoelastic polymer melts at different melt temperatures. Materials chosen for study were high‐density polyethylene, lowdensity polyethylene, and polypropylene.
Chang Dae Han, Jong Yoo Park
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Real-time Raman spectroscopy during LDPE/PP bilayer blown-film extrusion
Plastics, Rubber and Composites, 2005AbstractThe present study reports on a technique for real-time Raman spectroscopic measurement of crystallinity of the individual components of a bicomponent film (LDPE/PP) during blown-film extrusion. The 1296–1305 cm−1 band, observed predominantly for PE, was slightly masked by the contribution from the PP layer.
G. Gururajan, A. A. Ogale
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Electron beam crosslinking of extrusion-blown LDPE films: 1. Mechanical properties
European Polymer Journal, 1999Polyethylene films obtained by the extrusion-blowing process present anisotropic physical characteristics. This feature provides them with several interesting mechanical properties for numerous industrial applications. In this report, the effects of the electron beam treatment on such materials are presented.
O Guiot, L Tighzert, X Coqueret
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Blown film extrusion of poly(lactic acid) without melt strength enhancers
Journal of Applied Polymer Science, 2017ABSTRACTProcessing strategies were developed to manufacture poly(lactic acid) (PLA) blown films without melt strength enhancers (MSEs). The effects of processing temperature on PLA's melt properties (shear and elongational viscosities), PLA grades, and other processing conditions [ratio of take‐up roller to extruder's rotational screw speeds or ...
Sonal S. Karkhanis +3 more
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A thin-shell two-phase microstructural model for blown film extrusion
Journal of Rheology, 2010A two-phase microstructural constitutive relation is combined with the thin-shell model for the simulation of blown film extrusion. This combination includes equations for momentum conservation, flow-enhanced crystallization, viscoelasticity, and bubble-tube cooling.
J. C. Pirkle, Richard D. Braatz
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