Patent · US Active

Rigid film having high puncture resistance and tear propagation resistance

US9238315B2 · kind B2 · utility

0Cited by

2References

26Claims

0Family size

Assignee

RKW SE · DE

Inventors

Achim Grefenstein · Altrip, DE
Florian Brandmaier · Kolbermoor, DE
Leonhard Maier · Babensham, DE

Key dates

Filing date	Jan 28, 2011
Grant date	Jan 19, 2016
Priority date	—
Expiry date	Dec 28, 2032

Classification

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

Abstract

The present invention relates to a film and a method for the production thereof, wherein a starting film web comprising at least one layer having a polypropylene content of at least 45% by weight and a polyethylene content in the same layer or in a further layer is produced, the starting film web is heated to the molten state of the polyethylene, yet to below the molten state of the polypropylene and the heated starting film web is passed through a cooled roller nip.

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