Preparation of polyethylene films

Details Preparation of polyethylene films Preparation of polyethylene films

B - Operations, Transporting

29

C

B29C 47/00 (2006.01) B29C 55/00 (2006.01)

Patent

CA 2553553

A method for making high modulus and high density polyethylene films is disclosed. The method comprises orienting in machine direction (MD) a polyethylene blown film to a draw-down ratio greater than 10:1 to produce an MD oriented film having a 1% secant MD modulus of 1,000,000 psi or greater.

La présente invention a trait à un procédé de fabrication de films en polyéthylène haute densité à module élevé. Le procédé comprend l'orientation dans le sens machine d'un film en polyéthylène soufflé dans un rapport de réduction de l'étirage supérieur à 10:1 pour produire un film orienté dans le sens machine présentant un module sécant de sens machine 1 % égal ou supérieur à 1,000,000 livres par pouce carré.

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