Patent · US Expired

Heat-sealable packaging film

US5252384A · kind A · utility

49Cited by

8References

25Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Lothar Bothe · Mainz, DE
Volker Dolle · Kelkheim, DE
Andreas Winter · Königstein, DE
Thomas Wilhelm · Taunusstein, DE

Key dates

Filing date	Nov 4, 1991
Grant date	Oct 12, 1993
Priority date	—
Expiry date	Nov 4, 2011

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/3192
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

A polyolefin film which comprises a polypropylene base layer and at least one top layer comprising a propylene polymer, wherein the base layer is formed of an isotactic polypropylene and the top layer of a copolymer of an o-olefin having 2 to 8 carbon atoms and a syndiotactic propylene, has high sealed-seam strength and excellent optical properties and is useful as, for example, a packaging material.

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