Tubular packaging material and method for its manufacture

US4356200A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Klaus-Dieter Hammer · Mainz, DE
• Wolfgang Heinrich · Berlin, DE
• Guenter Gerigk · Oberursel, DE
• Max Bytzek · Naurod, DE

Key dates

• Filing date: Aug 4, 1981
• Grant date: Oct 26, 1982
• Expiry date: Aug 4, 2001

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31986
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

Disclosed is a tubular packaging material to produce a sausage casing comprising a carrier tubing comprised of hydrate and containing in its wall from about 5 to 12% by weight of water and from about 18 to 28% by weight of a plasticizer; an anchoring layer on the outside of the carrier tubing of a water-insoluble heat-cured synthetic condensation product; a film coating on the outside of the carrier tubing which is substantially impermeable to water and water vapor and which comprises a copolymer of vinylidene chloride; and a water-permeable adhesion-promoting layer on the inside surface of the carrier tubing, comprising a water-insoluble, heat-cured condensation product. The carrier tubing is characterized by a swelling value in the range from about 80 to 120%, and the tubular packaging, after soaking in water at a temperature between about 40.degree. to 50.degree. C. for a period of about 30 minutes and subsequent cooling to about room temperature, is characterized by dimensions in the wet state which are about 2 to 6% greater than those before the soaking in water, and wherein the tubular packaging, after simmering or boiling at a temperature of about 85.degree. C. for about 30 …