Title:
METHOD FOR MANUFACTURING LIQUID CRYSTAL DISPLAY PROTECTION PLATE
Document Type and Number:
WIPO Patent Application WO/2016/038868
Kind Code:
A1
Abstract:
The present invention provides a method for manufacturing a liquid crystal display protection plate in which the in-plane retardation value is controlled so as to be within a predetermined range. The manufacturing method includes: extruding a thermoplastic resin laminated body in a molten state from a T-die (11), the thermoplastic resin laminated body being a polycarbonate resin layer on which a methacrylic resin layer is laminated on at least one surface of the polycarbonate resin layer; pinching the thermoplastic resin laminated body between a first cooling roll (12) and a second cooling roll (13) while forming a bank therebetween; cooling the thermoplastic resin laminated body by winding the thermoplastic resin laminated body around the second cooling roll (13) and a third cooling roll (14); and forming a resin plate (16) by taking up the thermoplastic resin laminated body with a take-up roll (15). Subsequently, after undergoing a process of heating the resin plate (16) for 1 minute or more at a temperature of 50°C or more, the liquid crystal display protection plate is manufactured. The in-plane retardation value of the liquid crystal display protection plate is 50 to 210 nm and the decreasing rate of the in-plane retardation value of the liquid crystal display protection plate with respect to the in-plane retardation value of the resin plate (16) before heating is 5% or more.
Inventors:
ONO YOUJI (JP)
FUNAZAKI KAZUO (JP)
FUNAZAKI KAZUO (JP)
Application Number:
PCT/JP2015/004522
Publication Date:
March 17, 2016
Filing Date:
September 07, 2015
Export Citation:
Assignee:
KURARAY CO (JP)
International Classes:
B29C48/305; B29C48/885; B29C48/92; B29K69/00; B29L7/00; B29L9/00; B29L11/00
Domestic Patent References:
| WO2015093037A1 | 2015-06-25 |
Foreign References:
| JP2010085978A | 2010-04-15 | |||
| JP2013111834A | 2013-06-10 | |||
| JP2011033751A | 2011-02-17 |
Attorney, Agent or Firm:
IEIRI, Takeshi (JP)
House ON 健 (JP)
House ON 健 (JP)
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