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. 20, 2012
Filed:
Dec. 13, 2005
Kohji Masuda, Chiyoda-ku, JP;
Masayasu Ito, Chiyoda-ku, JP;
Kojiro Inamori, Chiyoda-ku, JP;
Naoki Yoshida, Chiyoda-ku, JP;
Michiaki Kawakami, Chiyoda-ku, JP;
Hiroyuki Yamazaki, Chiyoda-ku, JP;
Hidehumi Miyagi, Chiyoda-ku, JP;
Yong Hoon Kim, Chiyoda-ku, JP;
Kohji Masuda, Chiyoda-ku, JP;
Masayasu Ito, Chiyoda-ku, JP;
Kojiro Inamori, Chiyoda-ku, JP;
Naoki Yoshida, Chiyoda-ku, JP;
Michiaki Kawakami, Chiyoda-ku, JP;
Hiroyuki Yamazaki, Chiyoda-ku, JP;
Hidehumi Miyagi, Chiyoda-ku, JP;
Yong Hoon Kim, Chiyoda-ku, JP;
The Furukawa Electric Co., Ltd., Tokyo, JP;
Abstract
A thermoplastic resin foam which has both high reflectance and superior shape-retention properties, suitable for use in backlights and illumination boxes for illumination signboards, lighting fixtures, displays and the like. The thermoplastic resin foam is manufactured by a manufacturing method including a procedure for holding a resin sheet composed of thermoplastic resin (A) and thermoplastic resin (B), which has a functional group having an affinity with thermoplastic resin (A), within a pressurized inert gas atmosphere to enable the resin sheet to contain inert gas, and a procedure for foaming by heating the resin sheet containing inert gas at a temperature higher than the softening temperature of thermoplastic resin, under normal pressure.