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:
Nov. 15, 2016
Filed:
Nov. 25, 2013
Kaneka Corporation, Osaka-shi, Osaka, JP;
Toru Yoshida, Settsu, JP;
KANEKA CORPORATION, Osaka, JP;
Abstract
Polypropylene resin foamed particles containing a polypropylene random copolymer having a ratio of a Z-average molecular weight Mz to a number average molecular weight Mn, Mz/Mn, of 20 or more and 300 or less, a melt-flow rate of 5 g/10 minutes or more and 20 g/10 minutes or less, a melt strength of 2.5 cN or less, and a flexural modulus of 600 MPa or more and 1600 MPa or less, and preferably having at least two heat quantity areas of fusion can provide an in-mold foam molded article such as a returnable box having a short molding cycle at in-mold foam molding and beautiful surface properties; and are excellent in moldability even if an inner pressure more than the atmospheric pressure is not provided to the particles or the particles are filled in a mold without compressing them with a gas during the in-mold foam molding.