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:
Dec. 17, 1991
Filed:
Jul. 27, 1990
Applicant:
Inventors:
Yoshinori Suga, Tokyo, JP;
Eiji Tanaka, Kanagawa, JP;
Satoshi Kato, Tokyo, JP;
Kaoru Sato, Tokyo, JP;
Assignee:
Mitsubishi Kasei Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32R / ;
U.S. Cl.
CPC ...
428 64 ; 428 65 ; 428409 ; 4284111 ; 428413 ; 369272 ; 346 / ; 3461351 ;
Abstract
A substrate for an optical disc is disclosed, which comprises a transparent hydrocarbon resin having a softening point of not less than 100.degree. C., the surface thereof having been contact treated with a fluorine-containing gas so that the treated surface has a contact angle with water of not more than 90.degree. and the weight gain due to the treatment does not exceed 1% by weight. The substrate exhibits excellent adhesion to a recording layer formed thereon and excellent heat resistance.