Oriented film with improved heat sealability

Details Oriented film with improved heat sealability Oriented film with improved heat sealability

1995-02-23

1997-09-02

Le, H. Thi

Stock material or miscellaneous articles

Composite

Of polyamide

4284763, 428483, 428516, 428517, 428518, 428910, B32B 2706, B32B 2708, B32B 2730, B32B 2734

Patent

active

056630026

ABSTRACT:
A multilayer film is disclosed in which at least one layer thereof comprises a blend of:
a first styrene butadiene copolymer having a butadiene content of 50 weight percent or more; and
a second styrene butadiene copolymer having a butadiene content of 50 weight percent or less, wherein, the total butadiene content of the blend ranges from about 30 weight percent to about 50 weight percent. When used as an outer layer of an overwrap material, such blend provides provides an improved overlap heat seal.

REFERENCES:
patent: 326176 (1885-04-01), Stereon
patent: 4626455 (1986-12-01), Karabedian
patent: 4769261 (1988-09-01), Hazelton
patent: 5106677 (1992-04-01), Yeh et al.
patent: 5158836 (1992-10-01), Schirmer
patent: 5219666 (1993-06-01), Schirmer
patent: 5283127 (1994-02-01), Blumenstein et al.
patent: 5298202 (1994-03-01), Schirmer
patent: 5456979 (1995-10-01), Schirmer

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