Patent · US Expired

Metallizable multi-ply film

US4975315A · kind A · utility

32Cited by

7References

19Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Lothar Bothe · Mainz, DE
Gunter Schloegl · Kelkheim, DE
Guenther Crass · Taunusstein, DE
Thomas Wilhelm · Taunusstein, DE

Key dates

Filing date	Mar 15, 1988
Grant date	Dec 4, 1990
Priority date	—
Expiry date	Mar 15, 2008

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31917
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

A metallizable, sealable, biaxially stretch-oriented multi-ply film comprises a base layer essentially of polypropylene, a first polyolefinic facing layer and a second polyolefinic facing layer. All of the layers contain a neutralizing agent and a stabilizer against thermal degradation. The neutralizing agent is a calcium carbonate having an absolute particle size of less than 10.0 .mu.m, a mean particle size of less than 0.1 .mu.m, a specific surface area of more than 40 m.sup.2 /g and a whiteness of more than 90% and, the stabilizer comprises a phenolic stabilizer having a molecular weight of more than 1,000 g/mol. One polyolefinic facing layer contains an anti-blocking agent. In addition, a process for producing the metallizable multi-ply film is described, and its use as a packaging material is indicated.

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