Patent · US Expired

Multi-layer biaxially oriented polypropylene film having an improved barrier, a method for the production thereof, and the use thereof

US6811886B1 · kind B1 · utility

11Cited by

6References

19Claims

0Family size

Assignee

Hoechst Trespaphan GmbH · DE

Inventors

Angela Speith-Herfurth · Egelsbach, DE
Stefan Bunk · Püttlingen, DE
Robert Hansohn · Kirkel, DE

Key dates

Filing date	Feb 8, 2001
Grant date	Nov 2, 2004
Priority date	—
Expiry date	Feb 8, 2021

Classification

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

Abstract

The invention relates to a multi-layer, sealable, biaxially oriented polypropylene film having improved barrier properties which is constructed of a base layer, of at least one sealable covering layer and of at least one intermediate layer. The intermediate layer contains a wax with an average molecular weight Mn ranging from 200 to 1200. The invention also relates to a method for producing the film and to the use thereof.

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