ポリカーボネートシートのプレス成形体の製造方法

Japanese Patent JP7301063

B2

Provided is a novel method for producing a press-molded body of a polycarbonate sheet. A method for producing a press-molded body of a polycarbonate sheet including a resin layer (A) containing a polycarbonate resin as a main component, and a resin layer (B) containing a high hardness resin (B) as a main component and a hard coat layer (C) sequentially stacked on at least one surface of the resin layer (A). The method includes step (I) of pre-heating the polycarbonate sheet to a temperature in the range of a glass transition point of the resin layer (A)-45°C or higher and the glass transition point or lower; step (II) of locating the pre-heated polycarbonate sheet between an upper die and a lower die of a metal mold, wherein a time period after the step (I) is finished until the polycarbonate sheet is located between the upper die and the lower die of the mold is 90 seconds or shorter; and step (III) of clamping the mold to press one of the upper die and the lower die to the other of the upper die and the lower die to obtain the press-molded body of the polycarbonate sheet, wherein the mold has a temperature that is the glass transition point of the resin layer (A) or lower.

Atsushi Tokita
Masato Takasaki

JP2020550535A

June 30, 2023

October 03, 2019

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Mitsubishi Gas Chemical Co., Ltd.
MGC Filsheet Co., Ltd.

B29C43/52; B29C43/20; B32B27/36; B32B38/12

JP2014000688A
JP2017072915A
JP2018103518A
JP2002069210A

WO2015159813A1

Hiroshi Kobayashi
Kyoei Sugiyama
Yukiko Uetake
Yasuhito Suzuki

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