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. 02, 2019
Filed:
Nov. 20, 2014
Kuraray Co., Ltd., Kurashiki-shi, JP;
Tomoyuki Kitajima, Sodegaura, JP;
Keito Hishinuma, Sodegaura, JP;
KURARAY CO., LTD., Kurashiki-shi, JP;
Abstract
The surface protective film of the present invention is characterized in that the film comprises a polyolefin-based substrate layer and a pressure-sensitive adhesive layer, the pressure-sensitive adhesive layer contains at least a styrene-based elastomer, an acrylic-based pressure-sensitive adhesive and a tackifier, and in the pressure-sensitive adhesive layer, the styrene-based elastomer is blended in an amount of not less than 50% by mass but not more than 90% by mass based on the total amount of the pressure-sensitive adhesive layer, the acrylic-based pressure-sensitive adhesive is blended in an amount of not less than 1% by mass but not more than 40% by mass based on the total amount of the pressure-sensitive adhesive layer, and the tackifier is blended in an amount of not less than 1% by mass but not more than 49% by mass based on the total amount of the pressure-sensitive adhesive layer.