Patent · US Expired

Co-extruded, multi-layered, biaxially oriented, weldable flat film for the production of welded tubular films and use thereof

US6994912B2 · kind B2 · utility

2Cited by

4References

30Claims

0Family size

Assignee

NATURIN GMBH & CO. · DE

Inventors

Hartmut Grund · Otterstadt, DE
Horst Lang · Weinheim, DE
Helmut Schauer · Mount Royal, CA

Key dates

Filing date	Feb 1, 2001
Grant date	Feb 7, 2006
Priority date	—
Expiry date	Apr 4, 2021

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31855
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

The invention relates to a coextruded, multilayered, biaxially oriented and weldable flat film for the production of welded tubular films and to the use thereof for wrapping and packaging foodstuffs. The inventive flat film has two weldable surface layers made of at least one copolyamide and at least one amorphous polyamide and/or at least one homopolyamide and/or at least one modified polyolefin.

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