Polymethylpentene/polypropylene blend and film
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United States of America Patent
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Jul 9, 1996
Issued Date -
N/A
app pub date -
May 23, 1995
filing date -
Apr 27, 1993
priority date (Note) -
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Abstract
The present invention provides a composition comprising a blend of: (A) from about 90% to about 10% by weight of polymethylpentene, wherein the polymethylpentene has a molecular weight between from about 200,000 to about 700,000, and a melt flow rate between from about 20 grams/10 minutes to about 200 grams/10 minutes; (B) from about 10% to about 90% by weight of polypropylene, wherein the polypropylene has a molecular weight between from about 150,000 to about 350,000, and a melt flow rate between from about 1 gram/10 minutes to about 10 grams/10 minutes; whereby the blend of (A) and (B) has improved elongation and improved release properties. The invention further provides a blend with improved tensile strength, improved elongation, and improved release properties, and a method of producing a article with improved release properties from the blend.
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