US 4,396,039 A · Smoke-permeable tubular casing and process for its manufacture

Abstract

Disclosed is a tubular casing of fiber-reinforced regenerated cellulose comprising a film web which is curved to form a tube. The edge regions of the film web, which run parallel to the longitudinal axis, abut or overlap slightly and are sealed by means of a film strip which covers both the edge regions. The film web and the film strip composed of the same material have, in the wet remoistened stage, a breaking strength of about 15 to 30 N/mm.sup.2 and an elongation at break of about 30 to 50% in the longitudinal direction of the web, and a breaking strength of about 15 to 35 N/mm.sup.2 and an elongation at break of about 30 to 50% in the transverse direction of the web. The breaking strength in the transverse direction of the web is equal to or greater than that in the longitudinal direction of the web. The adhesive layer is smoke-permeable and is preferably composed of a material system which sets without a chemical reaction. The film web is produced from viscose, and it is prevented from shrinking during the process and is stretched in the transverse direction during drying. The tubular casing finds particular application as a sausage casing.

Claims30

Dependent claims

A casing for foodstuffs, comprising:

a web material formed into a tubular casing by curving the longitudinally running edges of said web material around the longitudinal axis of said web material, meeting or overlapping said edges, and bonding said edges by a glued seam, wherein said web material comprises a fiber-reinforced regenerated cellulose comprising in the wet remoistened state, in the longitudinal direction of said web material, a breaking strength of about 15 to 30 N/mm.sup.2 and an elongation at break of about 30 to 50% and, in the transverse direction of said web material, a breaking strength of about 15 to 35 N/mm.sup.2 and an elongation at break of about 30 to 50%, said breaking strength in said transverse direction of said web material being equal to or greater than said breaking strength in said longitudinal direction of said web material;
a layer comprising an essentially water-insoluble adhesion promoting resin, located at least in the region of said glued seam;
and
an adhesive layer for bonding said edges, wherein said adhesive layer comprises passages and/or interruptions, and/or a sheet-like textile, a sponge material, a foam, a microporous sheet or a membrane for providing permeability to smoke, whereby said casing is smoke-permeable over its entire circumference.

1 more element

Dependencies are inferred from the claim text.

Smoke-permeable tubular casing and process for its manufacture

Life of this patent

Smoke-permeable tubular casing and process for its manufacture

Life of this patent

Abstract

Claims30