Preparation of multilayer polyethylene thin films

Details Preparation of multilayer polyethylene thin films Preparation of multilayer polyethylene thin films

B - Operations, Transporting

32

B

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

Patent

CA 2597309

A method for making multilayer thin films is disclosed. The method of comprises orienting a thick multilayer film in the machine direction at a drawdown ratio effective to produce a multilayer thin film. The thick multilayer film has a thickness within the range of 1 mil to 5 mils and comprises at least one layer of a linear low density polyethylene (LLDPE) and at least one layer of a high density polyethylene (HDPE) or a medium density polyethylene (MDPE).

L~invention décrit un procédé de fabrication de films minces multicouches. Le procédé comprend l~orientation d'un film multicouche épais dans le sens de la machine, à un taux d~étirage efficace pour produire un film multicouche mince. Le film multicouche épais a une épaisseur allant de 1 mil à 5 mils et il comprend au moins une couche d~un polyéthylène basse densité linéaire (LLDPE) et au moins une couche d~un polyéthylène haute densité (HDPE) ou d~un polyéthylène moyenne densité (MDPE).

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