Polymethylpentene/polypropylene blend and film

Details Polymethylpentene/polypropylene blend and film Polymethylpentene/polypropylene blend and film

1995-05-23

1996-07-09

Zemel, Irina

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525242, C08L 2312

Patent

active

055345930

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.

REFERENCES:
patent: 3793239 (1974-02-01), Rixon et al.
patent: 4471085 (1984-09-01), Yamamoto et al.
patent: 4546150 (1985-10-01), Shigemoto
patent: 4886849 (1989-12-01), Hwo
patent: 5041491 (1991-08-01), Turke
patent: 5089309 (1992-02-01), Odate

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