Shrink films from propylene polymers
AssigneeExxon Chemical Patents Inc.
InventorsAspy Keki Mehta, Michael Chia-Chao Chen
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Abstract
Shrink films prepared from metallocene catalyzed propylene homopolymers and copolymers are provided. The films exhibit a unique balance of properties as compared to known shrink films including higher stiffness, tensile strength and moisture barrier, lower extractables, improved shrinkage and increased shrink tension. In addition, the shrink behavior of the film can be substantially tailored by modifying the amount of comonomer present in the propylene polymer.
Claims15
A film comprising one or more layers of shrink film comprising metallocene catalyzed, propylene polymer having hexane extractables of less than 3 weight percent, wherein the polymer is either a propylene homopolymer or propylene copolymer.
A film comprising one or more layers of shrink film comprising metallocene catalyzed, isotactic propylene polymer having hexane extractables of less than 3 weight percent, and wherein the polymer comprises from about 0.1 to about 20 weight percent comonomer.
Dependencies are inferred from the claim text.