Patent · US Expired

Sealable multilayer film of polyolefins

US4348457A · kind A · utility

31Cited by

4References

10Claims

0Family size

Assignee

Wolff Walsrode AG · DE

Inventors

Heinrich Rosenthal · Walsrode, DE
Ingo Schinkel · Walsrode, DE
Gunter Eger · Bad Fallingbostel, DE

Key dates

Filing date	Oct 14, 1980
Grant date	Sep 7, 1982
Priority date	—
Expiry date	Oct 14, 2000

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31938
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

A sealable multilayer film for packaging comprising a polypropylene film and at least one sealing layer of an ethylene homo- or copolymer wherein the sealing layer contains an additive combination of a long-chain amine, a thermoplastic polymer incompatible with the sealing polymer and a polydialkyl siloxane.

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