Results 201 to 210 of about 1,532,171 (223)
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Blown film extrusion: experimental, modelling and numerical study
2011This 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 ...
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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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Investigations of film thickness variations in blown film extrusion when using air guiding systems
Journal of Plastic Film & Sheeting, 2020The 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. Usually, the film is convectively cooled by cooling rings, coupled with an internal bubble cooling (IBC) system to increase the surface area and the cooling rate ...
Lars Kraus +3 more
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Increased output of blown film extrusion lines by using a cooling sleeve
AIP Conference Proceedings, 2014Production efficiency is one of the most important demands in blown film production. In many cases, the cooling power is the limiting factor for an increased output. A possible solution for a better cooling is the use of a cooling sleeve right after the outlet of the die in addition to the conventional air rings and internal bubble cooling (IBC).
Christian Hopmann +2 more
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The influence of “two-phase” synthesis conditions on blown film extrusion of LDPE
European Polymer Journal, 1979Abstract LDPE synthesized under two-phase conditions is known to have a good balance of blown film properties. Good optical properties and high impact strength are characteristic for two-phase LDPE grades. In order to obtain systematic information, LDPE was synthesized at several different pressures with two different melt index levels.
C. Bergström, A. Honkanen, M. Villanen
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The automatic film thickness control simulation for multi-layer co-extrusion blown film machine
Journal of Plastic Film & SheetingThe multi-layer co-extrusion blown film machine is capable of producing composite films with multiple advantages by integrating materials with distinct properties, thereby endowing the film material with excellent barrier performance and high strength.
Lianggan Chen +9 more
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Improved blown film extrusion of biopolymers
2013Lamnawar, Khalid, Maazouz, Abderrahim
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A thin-shell two-phase microstructural model for blown film extrusion Available to Purchase
Journal of Rheology, 2010Richard D. Braatz
exaly