Patent · US Expired

Web-shaped or tubular packaging film, in particular a sausage casing, with a barrier layer

US4741938A · kind A · utility

8Cited by

15References

19Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Erna Kastl · Niedernhausen, DE
Ludwig Klenk · Obermoschel, DE
Karl Stenger · Düsseldorf, DE
Horst Faust · Wiesbaden, DE

Key dates

Filing date	Oct 29, 1986
Grant date	May 3, 1988
Priority date	—
Expiry date	Oct 29, 2006

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31891
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

A web-shaped or tubular packaging film for use in food packaging applications, particularly as a sausage casing, is comprised of a carrier layer based on fiber-reinforced celulose and a closed thermoplastic, sealable resin coating based on copolymers containing vinylidene chloride (VDC) units. To improve the kink resistance, this resin coating is built up from at least two superposed layers, the first resin coating layer adjacent to the carrier layer being composed of a VDC copolymer forming flexible films and the outer, second resin coating layer being composed of a VDC copolymer forming rigid films. The web-shaped film is suitable for the production of tubular packaging casings, in particular sausage casings, with a longitudinal seam.

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