Biaxially oriented sealable polypropylene film having improved b

Details Biaxially oriented sealable polypropylene film having improved b Biaxially oriented sealable polypropylene film having improved b

1995-07-17

1996-09-10

Cannon, James C.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

26421112, 428 357, 428516, B29C 4700

Patent

active

055542450

ABSTRACT:
A sealable film is disclosed comprising (i) a base layer comprising polypropylene and a hydrocarbon resin and (ii) at least one top layer comprising (a) an ethylene/propylene copolymer having an ethylene content of not more than about 10% by weight, (b) a propylene/1-butene copolymer, (c) a propylene/ethylene/alpha-olefin terpolymer, or (d) a blend of two or more of (a), (b) and (c), wherein at least one of said base layer and said at least one top layer contains an anti-blocking agent or lubricant and wherein the top layer contains a hydrocarbon resin. The film possesses improved barrier properties with respect to permeability to water vapor and oxygen, and which at the same time exhibits favorable slip properties and low shrink values.

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patent: 5433983 (1995-07-01), Schuhmann et al.
Mueller et al, "Ullmanns Enzyklopaedie der Technischen Chemie" (Ullmann's Encyclopedia of Technical Chemistry) 4th edition, vol. 2, 1972, pp. 539-553.

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