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Article: The water permeability of blended polyethylene films

TitleThe water permeability of blended polyethylene films
Authors
KeywordsPlastics rubber
Issue Date1995
PublisherManey Publishing. The Journal's web site is located at http://www.maney.co.uk/search?fwaction=show&fwid=199
Citation
Plastics, Rubber & Composites Processing and Applications, 1995, v. 23 n. 4, p. 233-240 How to Cite?
Abstract
Water vapour transmission (WVT) characteristics of blended polyethylene films blown from a 45 mm single-screw extruder were examined. For a given die gap size and blow-up ratio, it was found that WVT basically had an exponential decaying relationship with increasing film thickness. For a given film thickness, molecular orientation on the film in the machine direction could be increased by increasing the size of the die gap. It was found that WVT of blended polyethylene films which involved some proportion of long chain side molecular branches components were more susceptible to die gap size effect than those films only involving linear type molecules. This was thought to be attributed to the more molecular orientation in the machine direction. The results showed that for a given degree of orientation in the transverse direction, WVT decreased if film thickness and die gap size increased. This study also demonstrated that lower WVT required longer saturation time and smaller amount of saturated water vapour obtained.
Persistent Identifierhttp://hdl.handle.net/10722/57400
ISSN

 

Author Affiliations
  1. The University of Hong Kong
DC FieldValueLanguage
dc.contributor.authorWong, ACYen_HK
dc.date.accessioned2010-04-12T01:35:29Z-
dc.date.available2010-04-12T01:35:29Z-
dc.date.issued1995en_HK
dc.identifier.citationPlastics, Rubber & Composites Processing and Applications, 1995, v. 23 n. 4, p. 233-240en_HK
dc.identifier.issn0959-8111en_HK
dc.identifier.urihttp://hdl.handle.net/10722/57400-
dc.description.abstractWater vapour transmission (WVT) characteristics of blended polyethylene films blown from a 45 mm single-screw extruder were examined. For a given die gap size and blow-up ratio, it was found that WVT basically had an exponential decaying relationship with increasing film thickness. For a given film thickness, molecular orientation on the film in the machine direction could be increased by increasing the size of the die gap. It was found that WVT of blended polyethylene films which involved some proportion of long chain side molecular branches components were more susceptible to die gap size effect than those films only involving linear type molecules. This was thought to be attributed to the more molecular orientation in the machine direction. The results showed that for a given degree of orientation in the transverse direction, WVT decreased if film thickness and die gap size increased. This study also demonstrated that lower WVT required longer saturation time and smaller amount of saturated water vapour obtained.en_HK
dc.languageengen_HK
dc.publisherManey Publishing. The Journal's web site is located at http://www.maney.co.uk/search?fwaction=show&fwid=199en_HK
dc.rightsPlastics, Rubber & Composites Processing and Applications. Copyright © Maney Publishing.en_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectPlastics rubberen_HK
dc.titleThe water permeability of blended polyethylene filmsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0959-8111&volume=23&issue=4&spage=233&epage=240&date=1995&atitle=The+water+permeability+of+blended+polyethylene+filmsen_HK
dc.identifier.emailWong, ACY: hreiwcy@hkucc.hku.hken_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.scopuseid_2-s2.0-0029214922-

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