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Title:
MULTILAYER SHEET, METHOD FOR PRODUCING SAME, AND DISPLAY WITH PROTECTIVE COVER
Document Type and Number:
WIPO Patent Application WO/2019/159890
Kind Code:
A1
Abstract:
The present invention provides a multilayer sheet which has an Re value with a preferable range, and which is capable of having sufficient stiffness and good surface properties even if the total thickness thereof is reduced in comparison to conventional multilayer sheets. A multilayer sheet according to the present invention comprises a surface layer (12) that contains a methacrylic resin and/or a modified polycarbonate resin on at least one surface of a base material layer (11) that contains a polycarbonate resin. This multilayer sheet has a total thickness of 0.3-0.95 mm. If this multilayer sheet is heated at 100°C for 5 hours, at least a part thereof has an Re value of 50-330 nm both before and after the heating; and the decrease rate of the Re value after the heating with respect to the Re value before the heating is less than 35%. The bending strength as determined by the method described below is 1 N or more. A multilayer sheet having a length of 80 mm and a width of 10 mm is subjected to a three-point bending test at a strain rate of 3 mm/min with a distance between supporting points of 30 mm, and the testing force applied to the multilayer sheet when the strain is 1.0% is defined as the bending strength of the multilayer sheet.

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Inventors:
OZAWA YUSHI (JP)
FUNAZAKI KAZUO (JP)
Application Number:
PCT/JP2019/004848
Publication Date:
August 22, 2019
Filing Date:
February 12, 2019
Export Citation:
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Assignee:
KURARAY CO (JP)
International Classes:
B32B27/30; B29C48/18; B29C48/88; B32B27/36; G02B5/30; G02F1/1333; G02F1/1335; G02F1/13363; G06F3/041; G09F9/00; B29K33/00; B29K69/00
Domestic Patent References:
WO2017164276A12017-09-28
WO2015093037A12015-06-25
WO2019022213A12019-01-31
WO2018030504A12018-02-15
WO2018199213A12018-11-01
Foreign References:
JP2017072815A2017-04-13
JP2010188719A2010-09-02
JP2017129868A2017-07-27
Attorney, Agent or Firm:
IEIRI Takeshi (JP)
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