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:
Oct. 22, 1996
Filed:
Dec. 28, 1994
Hitoshi Koga, Yamaguchi, JP;
Masao Kameyama, Yamaguchi, JP;
Kazuo Iwata, Yamaguchi, JP;
Masahiro Gonda, Yamaguchi, JP;
Mitsui Petrochemical Industries, Ltd., Tokyo, JP;
Abstract
The underside of a base layer consisting of one or more sub-layers is overlaid with an adhesive layer that is chiefly composed of an .alpha.-olefin copolymer that is based on at least two .alpha.-olefins selected from among .alpha.-olefins having 2-12 carbon atoms and which has a crystallinity of up to 10%, and said adhesive layer will develop an initial tack of at least 20 g/25 mm when attached to the surface of a stainless steel plate at 23.degree. C. The thus produced surface protective film, when attached to various kinds of adherends, will not experience separation of the adhesive layer from the base layer while developing strong initial tack, will experience only small changes in adhesive strength (peel strength) with the lapse of time after attachment to the adherends, is sufficiently low in blocking force to provide ease in film handling during the rewinding operation and it yet can be manufactured at low cost.