Patent · US Expired

Peelable, sealable polyolefinic multilayered film and its use as a packaging film

US6645609B2 · kind B2 · utility

2Cited by

6References

10Claims

0Family size

Assignee

Wolff Walsrode AG · DE

Inventors

Bernd Sperlich · Walsrode, DE
Helmut Wagner · Duderstadt, DE
Willi Schwarz · Irvine, US
Hans Wunderlich · Karlsruhe, DE

Key dates

Filing date	Jun 13, 2001
Grant date	Nov 11, 2003
Priority date	—
Expiry date	Jun 13, 2021

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31935
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

Described is a stretched multilayered film comprising: (a) a polyolefin layer; and (b) at least one peelable outer layer. Each peelable outer layer (b) independently is 0.5 to 5 &mgr;m thick, comprises a copolymer of vinyl acetate and ethylene, and has a vinyl acetate proportion of from 3 to 30 wt. %, based on the weight of the peelable outer layer (b). Also described is a method of using the multilayered film as a packaging film.

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