Packaging casing in the form of a shirred stick and process for producing a shirred packaging casing
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 packaging casing in the form of a shirred stick based on synthetic or natural polymers which has a 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 packaging casing comprising a shirred stick based on synthetic or natural polymers, in particular an artificial sausage casing, 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 added 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 smooth or roughened contact surface on a shirring rod with a smooth or roughened contact surface,
- minimizing a sliding friction between the tubular material and the surface of the shirring rod, said sliding friction is selected to be not only less than a sliding friction with substantial adhesion between smooth contact surfaces of the tubular material and the shirring rod but is also less than the frictional forces between the contact surfaces of the tubular material and the shirring rod in the case that both contact surfaces are roughened, and
- shirring the tubular material onto the shirring rod to the shirred stick.
Dependencies are inferred from the claim text.