Shirred stick packaging casing on high shirred density
AssigneeKalle GmbH
InventorsChristian Auf Der Heide, Dirk Auf Der Heide, Juerg-Heinrich Kallweit
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Abstract
The invention relates to a single- or multilayer shirred stick packaging casing in the form of a shirred stick based on synthetic or natural polymers which has a high shirring density of up to 1:500 at a length of the shirred stick of from 10 to 200 cm, and to a process for producing the packaging casing.
Claims22
A shirred stick packaging casing of high shirring density comprising a shirred stick based on synthetic or natural polymers, in particular an artificial sausage casing, wherein said artificial sausage casing is shirred from tubular material which is in contact with a shirring rod, said tubular material having a mean roughness of from 0.2 to 4.7 μm, said shirring rod having a mean roughness of from 0.3 to 4.8 μm, whereby the sum of the mean roughnesses of the tubular material and the shirring rod are from 0.5 to 5 μm, said shirred stick has a shirring density greater than 1:200 and up to 1:500 and a length from 10 to 200 cm, at a wall thickness of said tubular material of from 20 to 80 μm.
A process for producing a packaging casing in form of a shirred stick based on synthetic or natural polymers, in particular an artificial sausage casing, comprising the steps:
- loading a tubular material having a mean roughness of from 0.2 to 4.7 μm on a shirring rod having a mean roughness of from 0.3 to 4.8 μm, whereby the sum of the mean roughnesses of the tubular material and the shirring rod are from 0.5 to 5 μm,
- minimizing the sliding friction between the tubular material and the surface of the shirring rod, so that said sliding friction is less than (a) that which accompanies substantial adhesion between smooth contact surfaces of the tubular material and the shirring rod and (b) the frictional force between the contact surfaces of the tubular material and the shirring rod when both contact surfaces are roughened, and
- shirring the tubular material onto the shirring rod to the shirred stick, which has a shirring density greater than 1:200 up to 1:500 and a length from 10 to 200 cm at a wall thickness of said tubular material of from 20 to 80 μm.
Dependencies are inferred from the claim text.