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AssigneeBenecke-Kaliko AG
InventorsGustav Hildebrandt, Horst Buscher, Dirk Leiss, Reiner Taczkowski, Hans-Hinrich Kruse
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This invention concerns a sheet for producing plastic films with a tear-resistant layer and a plastic layer that is applied to the former and has a surface that faces away from the tear-resistant layer and is suitable for applying liquid or pasty plastics for the plastic film to be produced. The surface of the layer of plastic which is preferably a negative of a relief pattern consists of polypropylene. The sheet permits a high fidelity in reproduction of the relief pattern plus a long lifetime as well. The sheet may be relatively thin, so a great length can be wound up on a roll. Therefore, great lengths of a plastic film can be produced in one piece by casting or spreading liquid plastic on the sheet. Therefore, the conversion time required for the manufacturing installation is short, which has a positive effect on the price of the product.
Substantially continous sheet for producing plastic films, consisting of a tear-resistant layer with a plastic layer bonded to it, where the surface of the plastic layer facing away from the tear-resistant layer is suitable for applying liquid or pasty plastics for the plastic film to be produced has a structure which is a negative of the structure of the plastic film to be produced, and the improvement wherein the plastic layer with the surface consists at least partially of polypropylene.
Dependencies are inferred from the claim text.