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:
Jul. 18, 2023
Filed:
Oct. 03, 2019
Mitsubishi Gas Chemical Company, Inc., Tokyo, JP;
Mgc Filsheet Co., Ltd., Saitama, JP;
Atsuhiro Tokita, Osaka, JP;
Masato Takasaki, Osaka, JP;
MITSUBISHI GAS CHEMICAL COMPANY, INC., Tokyo, JP;
MGC FILSHEET CO., LTD., Saitama, JP;
Abstract
A method for producing a press-molded body of a polycarbonate sheet including resin layers (A) and (B) respectively containing a polycarbonate resin, and a high hardness resin (B) and a hard coat layer (C) sequentially stacked on at least one surface of the resin layer (A). The method includes pre-heating the polycarbonate sheet to a temperature between a glass transition point of the resin layer (A)−45° C. or higher and the glass transition point or lower; locating the pre-heated polycarbonate sheet between an upper and lower die of a mold, wherein a time period after the pre-heating is finished until the polycarbonate sheet is located between the upper and lower die of the mold is 90 seconds or shorter; and clamping the mold to press the upper and lower die to obtain the press-molded body of the polycarbonate sheet.