Patent · US Expired

Sealable, peelable plastics film

US5283127A · kind A · utility

5Cited by

5References

5Claims

0Family size

Assignee

BASF SE

Inventors

Uwe Blumenstein · Ludwigshafen, DE
Dietmar Bender · Schifferstadt, DE
Helmut Jenne · Schriesheim, DE

Key dates

Filing date	Jul 17, 1992
Grant date	Feb 1, 1994
Priority date	—
Expiry date	Jul 17, 2012

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31931
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

Multilayer, sealable plastics films essentially consist of PA0 A: a top layer A of a polymer which is dimensionally stable at elevated temperatures and has a melting point above 200.degree. C., PA0 B: an adhesion promoter B of from 30 to 95% by weight of a styrene/butadiene block copolymer, up to 95% by weight of polystyrene and/or high impact polystyrene and from 5 to 70% by weight of a polymer which is incompatible with polystyrene and contains polar groups, the percentages being based on B, PA0 C: a substrate layer C of from 5 to 100% by weight of a styrene/butadiene block copolymer and up to 95% by weight of polystyrene and/or high impact polystyrene, PA0 D: if required, a barrier layer D which may correspond to the top layer A and PA0 E: a sealing layer E whose composition essentially corresponds to that of the adhesion promoter B.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.