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:
Sep. 20, 1994
Filed:
Aug. 23, 1993
Applicant:
Inventors:
Tomonori Takahashi, Chigasaki, JP;
Masato Kimura, Fujisawa, JP;
Masataka Oka, Fujisawa, JP;
Isamu Ogasawara, Kawasaki, JP;
Assignee:
Nippon Petrochemicals Company, Limited, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ; B32B / ;
U.S. Cl.
CPC ...
428213 ; 2642102 ; 264280 ; 2642884 ; 428215 ; 4284744 ; 4284747 ; 4284752 ; 4284758 ; 4284761 ; 4284763 ; 428910 ;
Abstract
A multilayered packaging material having good piercing resistance and tearability and being excellent in appearance, transparency and so forth, can be produced by orienting multilayered structure which is composed of a polyamide resin layer and other thermoplastic resin layer(s) at a monoaxially stretching ratio of 1.5- to 7.0-fold in such a manner that the thickness of the polyamide resin layer is 3 to 30 .mu.m and the thickness(es) of the other thermoplastic resin layer(s) is (are) at least twice as much as that of the polyamide resin layer.