The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 26, 1988
Filed:
Dec. 22, 1986
Applicant:
Inventors:
Takeshi Suzuki, Ichihara, JP;
Nobutoshi Komori, Ichihara, JP;
Assignee:
Chisso Corporation, Ohsaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428349 ; 428500 ; 428516 ; 428910 ; 5263481 ;
Abstract
A polypropylene composite stretched film having superior low-temperature heat-sealing characteristics, transparency and anti-block properties is provided, which film comprises as a base layer, a crystalline polypropylene and as a heat-sealing layer, a crystalline ethylene-propylene random copolymer containing 1 to 5% by weight of polymers having a molecular weight (Mw) of 6,000 or less and 3 to 5% by weight of ethylene, or a crystalline ethylene-propylene-butene-1 copolymer containing 1 to 5% by weight of polymers having a Mw of 6,000 or less, 1 to 10% by weight of ethylene and 4 to 30% by weight of butene-1.