Plastics film composed of rigid polyvinyl chloride (RPVC) and process for its production
AssigneeKloeckner Pentaplast GmbH & Co. KG
InventorsCor Van Rijn, Peter Ras, Hans Thijs
Life of this patent
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Abstract
A plastics film 1 composed of rigid polyvinyl chloride serves as backing film for a sleeve label. The sleeve label can be applied by adhesive bonding and shrinking onto a peripheral surface of the cylindrical body. A protective covering film 2 has been laminated onto the plastics film 1. The plastics film 1 has been stretched in the machine direction of a calender and has a longitudinal heat shrinkage of from 40 to 60%, based on the unstretched plastics film. Perpendicularly to the machine direction of the calender, the heat shrinkage of the plastics film is from 0 to 10%.
Claims21
A plastics film composed of rigid polyvinyl chloride as backing film for a single- or multilayer, adhesive-bondable sleeve label which can be applied by adhesive bonding and shrinking onto a peripheral surface of a cylindrical body, wherein the plastics film has been stretched in the machine direction of a calender, and has a positive heat shrinkage of from about 40 to 60%.
A process for producing a plastics film composed of rigid polyvinyl chloride, which is calendered and heat-stretched, which comprises undertaking the stretching in the machine direction of the calender, and changing the dimension of the plastics film longitudinally by from about 40 to 60% of the length of the unstretched plastics film.
Dependencies are inferred from the claim text.