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, 2025
Filed:
Dec. 21, 2021
Jsp Corporation, Tokyo, JP;
Tokunobu Nohara, Tokyo, JP;
Yasutaka Ode, Utsunomiya, JP;
JSP CORPORATION, Tokyo, JP;
Abstract
A polypropylene-based resin expanded beads configured to include an NOR type hindered amine and has a surface on which a thermoplastic polymer layer is located, in which a blending ratio of the amine in the expanded beads is 0.03 wt % or more and 0.5 wt % or less, and a blending ratio of the amine in the thermoplastic polymer layer is less than the blending ratio of the amine in the expanded beads. Further, the method for producing the expanded beads includes a covering and foaming step, in which in the resin beads to be obtained in the covering step, a blending ratio of the amine in the resin beads is adjusted to be 0.03 wt % or more and 0.5 wt % or less, and a blending ratio of the amine in a thermoplastic polymer layer is adjusted to be lower than the blending ratio of the amine in the resin beads.