Machine-direction oriented multilayer films

Details Machine-direction oriented multilayer films Machine-direction oriented multilayer films

B - Operations, Transporting

29

C

B29C 55/02 (2006.01) B29C 55/06 (2006.01) B32B 27/32 (2006.01)

Patent

CA 2557712

A method for making films is disclosed. The method comprises orienting in the machine direction a multilayer film at a draw-down ratio effective to give the film a dart-drop strength that increases with increasing draw-down ratio. The multilayer film comprises at least one layer of a linear low density polyethylene and at least one layer of a high density polyethylene or a medium density polyethylene.

La présente invention concerne un procédé de fabrication de films. En l'occurrence, on oriente dans le sens machine un film multicouche avec un rapport de striction suffisant pour donner au film une résistance au choc au mouton augmentant avec l'augmentation du rapport de striction. Ce film multicouche comprend au moins une couche d'un polyéthylène linéaire basse densité et au moins une couche de polyéthylène haute densité au moyen densité.

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