POLYMETHYLPENTENE/POLYPROPYLENE COMPOSITION EXCELLENT IN RELEASABILITY AND PRODUCTION OF FILM THEREOF - Saint-Gobain Performance Plastics Corporation

Title:

POLYMETHYLPENTENE/POLYPROPYLENE COMPOSITION EXCELLENT IN RELEASABILITY AND PRODUCTION OF FILM THEREOF

Document Type and Number:

Japanese Patent JP3106139

Kind Code:

B2

Abstract:

PURPOSE: To obtain an inexpensive release film compd. showing low initial peel strength, high tensile strength and high elongation at break suitable for forming a release film or a release liner and holding release properties even after the elapse of time.
CONSTITUTION: A compsn. having large elongation and improved release properties is constituted by including about 90-10 wt.% polymethylpentene with a mol.wt. of about 200,000-700,000 and melt flow rate of about 20-200 g/10 min and about 10-90 wt.% polypropylene with a mol.wt. of about 150,000-350,000 and a melt flow rate of about 1-10 g/10 min. Pref., the elongation of the compsn. is larger than about 250% and the release load thereof is smaller than about 0.60 lb/in and polypropylene has an atactic fraction smaller than about 2%. By extruding this compsn., a film can be formed.

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Inventors:

Michael friedman

Application Number:

JP6047994A

Publication Date:

November 06, 2000

Filing Date:

March 30, 1994

Export Citation:

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