Patent · US Expired

Opaque multilayered film having an inherent resistance to delamination

US5026592A · kind A · utility

50Cited by

4References

22Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Siegfried Janocha · Wiesbaden, DE
Gunter Schloegl · Kelkheim, DE
Guenther Crass · Taunusstein, DE
Lothar Bothe · Mainz, DE

Key dates

Filing date	Dec 22, 1988
Grant date	Jun 25, 1991
Priority date	—
Expiry date	Dec 22, 2008

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31913
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

Disclosed is an opaque, biaxially stretch-oriented, polyolefinic multilayered film comprising an opaque core layer and two transparent top layers. The core layer contains a mixture of PA1 1) about 45 to 90% by weight of a thermoplastic polymer comprising propylene, PA1 2) about 5 to 25% by weight of an inert, particulate filler, and PA1 3) about 5 to 30% by weight of a hydrocarbon resin being compatible with the thermoplastic polymer and having a softening point in the range from about 100.degree. to 160.degree. C., PA1 the percentages being each time related to the total weight of the mixture. The top layers are free from admixtures comprising particulate filler and resin. The film possesses high resistance to delamination.

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