Alliedsignal Inc.

Ausimont Usa, Inc.

Ferdinand A DeAntonis

Alfieri Degrassi

William H Murrell

Mingliang Lawrence Tsai

Multilayered films produced by coextruding or laminating films comprised of at least one layer of polymethylpentene, at least one layer of a polyamide and an intermediate polymeric adhesive layer. The polyamide layer allows the polymethylpentene layer to be stretched up to 6 times its original length. Such a high orientation ratio for the mulitlayered film increases the mechanical strength and toughness properties of the film. The mulitlayered films are suitable for use as release films for high temperature composite applications such as printed circuit boards.

High temperature release films

The present invention is a film laminate comprising a polyamide layer, preferably polyepsiloncaprolactam, and a layer of ethylene vinyl alcohol copolymer. The polyamide layer and ethylene vinyl alcohol copolymer layer are preferably adjacent layers. The laminate is expanded to an area of less than 4 times the original area. Preferably, the laminate is drawn to a draw ratio of from 1.5:1 to 4:1 in at least one direction. Preferred laminates have outer layers of polyepsiloncaprolactam and at least one inner layer of ethylene vinyl alcohol copolymer adjacent to at least one layer of polyepsiloncaprolactam. Preferably, the laminate is a multilayer coextrusion.

Oriented film laminates of polyamides and ethylene vinyl alcohol

The present invention is a multilayered coextruded film and process of coextruding. The coextruded film comprises at least one thermoplastic fluoropolymer layer and at least one thermoplastic polymeric layer adjacent to the thermoplastic fluoropolymer layer. There is preferably a coextruded adhesive layer between each thermoplastic fluoropolymer layer and each thermoplastic polymeric layer. The coextruded film can be oriented in at least one direction and/or embossed without delamination, fibrillating, or splitting.

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Fogelsville, PA, United States of America

Ferdinand A DeAntonis