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. 25, 2021
Filed:
Sep. 09, 2016
Kaneka Corporation, Osaka, JP;
Ryuta Kutsumizu, Osaka, JP;
Shotaro Maruhashi, Osaka, JP;
Ryoji Nakayama, Osaka, JP;
Yoshihito Yano, Osaka, JP;
Kirito Suzuki, Tokyo, JP;
KANEKA CORPORATION, Osaka, JP;
Abstract
Expandable styrene resin particles include 2.0 wt % to 8.0 wt % of graphite, and the graphite has a mean particle size of 2.5 μm to 9 μm. The expandable styrene resin particles satisfy (i) a laser scattering intensity per unit solution concentration of the graphite is not less than 5 {%/(mg/ml)}/wt %, (ii) an area of the graphite per unit solution concentration of the graphite in 1 mmis not less than 55 ({mm/mm}/{g/g}), or (iii) when the expandable styrene resin particles are pre-expanded and are made into an expanded molded product having an expansion ratio of 40 times, a value (%/wt %) obtained by dividing, by the content of the graphite (wt %), a percentage of an area occupied by the graphite in a surface layer of the expanded molded product (%), a quotient of which is further multiplied by 100, is not less than 100.