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:
Jan. 10, 1984
Filed:
Mar. 19, 1982
Tomishi Shibano, Tama, JP;
Sachio Maruchi, Tokyo, JP;
Koji Yakan, Tanashi, JP;
Tadashi Kobayashi, Tokyo, JP;
Saburo Akimoto, Yokohama, JP;
Sanyo-Kokusaku Pulp Co., Ltd., Tokyo, JP;
Abstract
Pressure sensitive adhesive products or articles having one or more release layers and a pressure sensitive adhesive layer, said one or more release layer comprising a polyolefinic elastomer having a shearing modulus of less than 2.0.times.10.sup.8 dyne/cm.sup.2 and surface wettability expressed in terms of an equilibrium contact angle of more than 55.degree. with respect to a standard liquid, and said adhesive layer being composed mainly of a polyacrylate. To increase the adhesion between the release layer and a backing substrate, a reinforcing interlayer may be used. As the release layer, a mixture of the polyolefinic elastomer and polyethylene may be used. The release layer is then kept in contact with the adhesive layer over a given area to form a composite or integral layer thereof as by extrusion coating.