Multilayered molding

Details Multilayered molding Multilayered molding

1991-12-10

1993-02-23

Van Balen, William J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including variation in thickness

4283166, 4283197, 4283199, 428516, B32B 326

Patent

active

051888823

ABSTRACT:
A multilayered molding is disclosed, which has a base molding outer layer mainly composed of a partial crosslinking type substance A obtained from polyolefin resin and ethylene-.alpha.-olefin copolymer rubber or a mixture B of polyolefin resin and ethylene-.alpha.-olefin copolymer rubber or both. The outermost layer is in direct contact with and forms a lamination with an inner intermediate layer or a base molding composed of a polyethylene resin, for instance, and is firmly bonded to the outermost layer. A method of manufacturing such multilayered molding is also disclosed, in which a composite sheet of the thermoplastic elastomer with or without the intermediate layer is preliminarily heated, followed by being suction held in close contact with a mold cavity inner surface, thus forming a surface layer. The mold is then clamped, and fluidized and plasticized polyolefin resin is injected to produce the molding. The polyolefin resin may also be injected prior to the clamping.

REFERENCES:
patent: 4889762 (1989-12-01), Uchiyama et al.
patent: 4894289 (1990-01-01), Otawa et al.

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