Coextrustion tie layer and process for producing such tie layer

Details Coextrustion tie layer and process for producing such tie layer Coextrustion tie layer and process for producing such tie layer

1986-05-02

1987-05-26

van Balen, William J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including a second component containing structurally defined...

15624411, 15624418, 4284761, 4284758, 4284769, 428516, 525179, B32B 2714, B32B 516

Patent

active

046685715

ABSTRACT:
The present invention relates to a stock material and a process for producing such stock material. The stock material comprises a first outer layer of polyamide resin, a second outer layer of polyolefin resin and a tie layer therebetween which comprises a copolymer of ethylene and maleic anhydride, a polyamide resin and a polyolefin resin. The process of the invention comprises the steps of providing a particulate material having a layer of polyamide resin, a layer of polyolefin resin and a layer therebetween comprising a copolymer of ethylene and maleic anhydride; admixing the particulate material with a copolymer of ethylene and maleic anhydride to produce a tie layer composition; and coextruding a tie layer of the tie layer composition between and in contact with a first outer layer of polyamide resin and a second outer layer of polyolefin resin.

REFERENCES:
patent: 4104404 (1978-08-01), Bieler et al.
patent: 4407873 (1983-10-01), Christensen et al.
patent: 4419408 (1983-12-01), Schmukler et al.
patent: 4588648 (1986-05-01), Krueger et al.
patent: 4617240 (1986-10-01), Krueger et al.

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