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

1993-11-18

1995-07-04

Buffalow, Edith

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428330, 428349, 428516, 525192, 525194, B32B 702

Patent

active

054298628

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. 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.

REFERENCES:
patent: 4698261 (1987-10-01), Bothe et al.
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patent: 4921749 (1990-05-01), Bossaert et al.
patent: 5091237 (1992-02-01), Schloegl 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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