MANUFACTURE OF STRETCHED FILM
PURPOSE:To improve the mechanical properties of stretched films by a method in which a polysulfone resin film is subjected to a zone-stretching process under a condition that the temperature of the film, which is calculated in terms of a specific formula, is within the range from temperatures lower...
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Main Authors | , , |
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Format | Patent |
Language | English |
Published |
17.03.1987
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Subjects | |
Online Access | Get full text |
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