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Title:
ACRYLIC RESIN BIAXIALLY ORIENTED FILM AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2018/147234
Kind Code:
A1
Abstract:
The present invention, which provides an acrylic resin biaxially oriented film having low linear expansivity, exceptional impact resistance, and exceptional dimensional stability with a high shrinkage start temperature, and a method for producing the same, is: a method for producing an acrylic resin biaxially oriented film characterized in that a film web, comprising a thermoplastic resin composition [C] that contains 99.9-50% by mass of a (meth)acrylic resin [A] having a glass transition temperature TA of 140°C or lower and 0.1-50% by mass of a thermoplastic resin [B] having a glass transition temperature TB of (TA + 10°C) or higher, is subjected to biaxial orientation at a temperature equal to or greater than the glass transition temperature TC of the resin composition [C] and then to heat setting at a temperature of at least (TC – 25°C) and less than TC; and an acrylic resin biaxially oriented film characterized by having a shrinkage start temperature of 110°C or higher, a linear expansion coefficient of 60 ppm/°C or lower, and an impact strength of 4.5 J/mm or higher, especially an acrylic resin biaxially oriented film in which the thermoplastic resin composition [C] has a single glass transition temperature TC.

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Inventors:
TAKASUKA YUUKI (JP)
FUKUHARA NAOTO (JP)
NAKAHARA ATSUHIRO (JP)
Application Number:
PCT/JP2018/003847
Publication Date:
August 16, 2018
Filing Date:
February 05, 2018
Export Citation:
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Assignee:
KURARAY CO (JP)
International Classes:
C08J5/18; B29C55/16; C08L33/06; B29K33/04; B29L7/00; B29L11/00
Domestic Patent References:
WO2016076357A12016-05-19
WO2015151466A12015-10-08
WO2015151466A12015-10-08
WO2014021264A12014-02-06
WO2011089794A12011-07-28
WO2012124395A12012-09-20
Foreign References:
JP2016113579A2016-06-23
JP2012096461A2012-05-24
JP2010052323A2010-03-11
JP2010037523A2010-02-18
JP2010243818A2010-10-28
JPH0243023A1990-02-13
JP2008101202A2008-05-01
JP2008231234A2008-10-02
JP2016535159A2016-11-10
JP2008546024A2008-12-18
JP2012051997A2012-03-15
JP2014064519A2014-04-17
JPH0725859B21995-03-22
JPH0335432A1991-02-15
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Other References:
See also references of EP 3581609A4
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