Patent · US Expired

Peelable, heat-sealable, multilayered polyolefin film, process for the production thereof, and the use thereof

US5997968A · kind A · utility

52Cited by

15References

21Claims

0Family size

Assignee

Hoechst Trespaphan GmbH · DE

Inventors

Thomas Dries · Bad Kreuznach, DE
Lothar Hoppenstein · Eltville am Rhein, DE
Adolf Wilhelm · Wiesbaden, DE

Key dates

Filing date	Dec 20, 1996
Grant date	Dec 7, 1999
Priority date	—
Expiry date	Dec 20, 2016

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31938
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

A multilayer polyolefin film comprising of at least three coextruded layers comprising an opaque base layer, an intermediate layer, and an outer peelable surface layer composed of two incompatible polyolefins, wherein the intermediate layer contains at least 80% by weight of a polyolefin having a lower melting point or lower glass transition temperature than the polyolefin forming the base layer.

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