B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 27/32 (2006.01) C08J 5/18 (2006.01) C08J 7/04 (2006.01) C08L 23/12 (2006.01) C09D 175/04 (2006.01)
Patent
CA 2519639
A printable, coated, biaxially oriented film is provided that includes a polypropylene base film having a first and a second side, and a urethane coating on the first side. The coating has been applied to the base film between a machine direction orientation and a transverse direction orientation of a two step tentering operation. A method for manufacturing the film is also provided which includes the steps of forming a base film of a substantially uniform film layer of polypropylene, uniaxially orienting the base film by machine direction stretching, applying a coating of urethane to a first side of the uniaxially oriented base film, and biaxially orienting the coated film by stretching the film transversely to the machine direction.
L'invention concerne un film imprimable, revêtu et orienté de manière biaxiale et comprenant un film de base en polypropylène présentant des premier et second côtés et un revêtement uréthane sur le premier côté. Le revêtement a été appliqué sur le film de base entre une orientation dans le sens de la machine et une orientation dans le sens transversal d'une opération de traitement sur rames en deux étapes. L'invention concerne également un procédé de fabrication du film comprenant les étapes consistant à former un film de base d'une couche sensiblement uniforme de polypropylène, à orienter de manière uniaxiale le film de base par étirement de celui-ci dans le sens de la machine, à appliquer un revêtement d'uréthane sur un premier côté du film de base orienté de manière uniaxiale et à orienter de manière biaxiale le film revêtu par étirement de celui-ci de manière transversale par rapport au sens de la machine.
Applied Extrusion Technologies Inc.
Ridout & Maybee Llp
LandOfFree
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