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Calendered rigid vinyl polymer compositions

The present invention provides an external lubricant composition for calendered vinyl polymer. The external lubricant provides rigid vinyl polymer compositions having improved plate out resistance, clarity, release, and stability. The external lubricant comprises an effective amount for lubricating vinyl polymer of polyethylene having a Brookfield viscosity at a temperature of 150.degree. C. of greater than about 85,000 centipoises and an acid number as determined by standardized titration of KOH of between about 5 and about 9. Sheets of the calendered vinyl polymer are used for blister packs and credit cards.

Patent Information

NumberUS  5414035
CountryUS
StatusIssued
Date05/09/1995


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