Heat-shrinkable UHMV polymer film, tubing, and roll covers
AssigneeFluoron GmbH
InventorsFrank M. Chapman, Randall F. Chapman
Life of this patent
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Abstract
The present relates to the heat shrinkable thermoplastic materials which are used as roll covers. The heat shrinkable materials used for the roll covers include only ultra high melt viscosity polymers, having a melt viscosity too high for conventional melt processing, such as TFM and UHMWPE, rather than the conventional FEP or PFA.
Claims9
An article of manufacture comprising an ultra-high melt viscosity polymer having a melt viscosity too high for conventional melt processing and pressure-expanded to a shape in a stressed condition, which stressed condition releases causing shrinking of said shape in at least one dimension under heating at a temperature below 300 F., and wherein said ultra-high melt viscosity polymer comprises a material selected from the group consisting of fully sintered polytetraflurorethylene, modified polytetraflurorethylene, and ultra-high molecular weight polyethylene.
Dependencies are inferred from the claim text.