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:
May. 20, 2014
Filed:
Sep. 28, 2011
Eiji Hayashishita, Nagoya, JP;
Katsutoshi Ozaki, Nagoya, JP;
Mitsuru Sakai, Kisarazu, JP;
Setsuko Oike, Yokohama, JP;
Eiji Hayashishita, Nagoya, JP;
Katsutoshi Ozaki, Nagoya, JP;
Mitsuru Sakai, Kisarazu, JP;
Setsuko Oike, Yokohama, JP;
Mitsui Chemicals, Inc., Minato-Ku, Tokyo, JP;
Abstract
To provide an olefinic expandable substrate and a dicing film that exhibits less contamination characteristics, high expandability without necking, which cannot be achieved by conventional olefinic expandable substrates. In order to achieve the object, an expandable film comprises a 1-butene-α-olefin copolymer (A) having a tensile modulus at 23° C. of 100 to 500 MPa and a propylenic elastomer composition (B) comprising a propylene-α-olefin copolymer (b1) and having a tensile modulus at 23° C. of 10 to 50 MPa, wherein the amount of the component (B) is 30 to 70 weight parts relative to 100 weight parts in total of components (A) and (B).