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Priority claimed from PCT/EP2004/004687external-prioritypatent/WO2004094129A2/en
Application filed by Ole-Bendt RasmussenfiledCriticalOle-Bendt Rasmussen
Publication of TW200603991ApublicationCriticalpatent/TW200603991A/en
Shaping By String And By Release Of Stress In Plastics And The Like
(AREA)
Abstract
A method and apparatus for transverse stretching and oreientable of an orientat)le film or polymer films wherein the apparatus comprises a tenter frame, In which both edges of the film are held by continuously advancing lateral expansion means (251) and the film is heated such that the width of the film is gradually expanded as it is advanced through the apparatus by expansion means. The orientation process at each position of the passage is essentially limited to one or two narrow neck-zones each controlled by narrow heating means (252) which, seen in the transverse dimension of the apparatus, each act over a narrow space and over which the film is passed in frictionless or low friction engagement The longitudinal direction is angularly disposed to the film travel such that in each film cross section the narrow neck-zone or zones gradually proceeds over the width of the film until essentially the entire width to be oriented has been passed by such zone or zones.
TW094113116A2004-04-262005-04-25Tenterframe stretching process and apparatus for same
TW200603991A
(en)