C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 25/06 (2006.01) B29C 55/00 (2006.01) B65D 65/38 (2006.01) C08F 2/46 (2006.01) C08J 3/28 (2006.01) C08J 5/18 (2006.01) C08L 9/06 (2006.01) C08L 25/02 (2006.01)
Patent
CA 2525551
A heat-shrinkable film and a method of its manufacture are provided. In an exemplary embodiment, a polystyrene film exhibits heat-induced growth in the cross direction of great than or equal to 5% with greater than or equal to 30% concomitant shrinkage in the machine direction. The films may comprise crystal polystyrene, high impact polystyrene, and/or elastomers. A method of manufacture is disclosed which includes a post~extrusion temperature conditioning step.
La présente invention concerne un film thermorétractable et un procédé pour le produire. Dans un mode de réalisation, un film polystyrène a une croissance induite par la chaleur en direction transversale supérieure ou égale à 5 % et un rétrécissement dans la direction machine, supérieur ou égal à 30 %. Les films peuvent comprendre du polystyrène cristallin, et/ou des élastomères. L'invention a également pour objet un procédé pour produire le film, comprenant une étape de conditionnement de température post-extrusion.
Mbm Intellectual Property Law Llp
Plastic Suppliers Inc.
LandOfFree
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