Stock material or miscellaneous articles – Composite – Of addition polymer from unsaturated monomers
Patent
1997-04-28
1999-01-12
Pezzuto, Helen L.
Stock material or miscellaneous articles
Composite
Of addition polymer from unsaturated monomers
428447, 428500, 428515, B32B 2708
Patent
active
058585524
ABSTRACT:
A film structure comprises a first outer skin layer (a) of an olefin co- or terpolymer having an external surface which is sealable and machinable, the first skin layer containing a non-migratory particulate crosslinked hydrocarbyl substituted polysiloxane, and which is located on one side of a core olefinic polymer layer (b) on an opposite side of the core layer there is a second skin layer (c) which is ethylene homopolymer and which is free of the particulate crosslinked hydrocarbyl-substituted polysiloxane of the first skin layer, the second skin layer. In one embodiment, for improved barrier properties, the ratio of particle size to thickness of the (a) skin layer ranges from about 1.25 to about 2.5.
REFERENCES:
patent: 4230767 (1980-10-01), Isaka et al.
patent: 4419411 (1983-12-01), Park
patent: 4725466 (1988-02-01), Crass et al.
Bader Michael J.
Crane Susan S.
Johnson, Jr. James A.
Tran Francis D.
Mobil Oil Corporation
Pezzuto Helen L.
Sinnott Jessica M.
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