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:
Mar. 09, 2021
Filed:
Jan. 18, 2019
Applicant:
Kaneka Corporation, Osaka, JP;
Inventors:
Ryoji Nakayama, Osaka, JP;
Ryuta Kutsumizu, Osaka, JP;
Assignee:
KANEKA CORPORATION, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08J 9/18 (2006.01); C08F 10/06 (2006.01); C08J 9/16 (2006.01); C08J 3/24 (2006.01); B29C 44/00 (2006.01); B29C 67/20 (2006.01); C08L 23/10 (2006.01);
U.S. Cl.
CPC ...
C08J 9/18 (2013.01); B29C 44/00 (2013.01); B29C 67/20 (2013.01); C08F 10/06 (2013.01); C08J 3/24 (2013.01); C08J 9/16 (2013.01); C08L 23/10 (2013.01); C08F 2500/11 (2013.01); C08F 2500/12 (2013.01); C08F 2500/17 (2013.01); C08J 2201/026 (2013.01); C08J 2201/03 (2013.01); C08J 2201/038 (2013.01); C08J 2323/10 (2013.01);
Abstract
Pre-expanded polypropylene-based resin particles include a polypropylene-based resin. The polypropylene-based resin satisfies tan δ≤0.32×V+0.1, where tan δ represents a loss tangent at an angular frequency of 0.1 rad/s in dynamic viscoelastic behavior measurement at 200° C. and V represents a melt fracture take-up speed (m/min) at 200° C.