BIAXIALLY ORIENTED POLYESTER FILM FOR MOLD RELEASE

Title:

BIAXIALLY ORIENTED POLYESTER FILM FOR MOLD RELEASE

Document Type and Number:

Japanese Patent JP2016043594

Kind Code:

A

Abstract:

PROBLEM TO BE SOLVED: To provide a biaxially oriented polyester film for mold release that is especially suitable as a heat-resistant film for mold release with high process conformity which has a sufficient adhesion before a heating press, and has good detachability after the heating press in a circuit forming process which requires a mat tone by the reason that the biaxially oriented polyester film for mold release contains particles in high concentration, and a polarity force component in the surface free energy and a ratio of the real surface area of a film to a projected area are respectively in a suitable range.SOLUTION: There is provided a biaxially oriented polyester film for mold release which has a polyester layer A containing inorganic particles and/or organic particles in an amount of 1 mass% or more and 10 mass% or less based on 100 mass% of the total polyester layer A on at least an other outermost layer. A polarity force component in the surface free energy measured from the polyester layer A side of the outermost layer is more than 4.0 mN/m and 9.0 mN/m or less. The surface area S of the film per unit projected area are 1.01 or more and 1.15 or less.SELECTED DRAWING: None

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Inventors:

SHOJI HIDEO
MANABE ISAO
TAKADA HAGUMU

Application Number:

JP2014170124A

Publication Date:

April 04, 2016

Filing Date:

August 25, 2014

Export Citation:

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Assignee:

TORAY INDUSTRIES

International Classes:

B29C55/14; B29C33/68; B32B7/02; B32B27/00; B32B27/20; B32B27/36; C08J5/18; C08K3/34; C08L67/00

Domestic Patent References:

JP2002248727A	2002-09-03
JPH09216323A	1997-08-19
JP2007190785A	2007-08-02
JP2015040220A	2015-03-02
JPH09302113A	1997-11-25
JPH09277478A	1997-10-28
JP2015077783A	2015-04-23
JP2012011657A	2012-01-19
JPH08230340A	1996-09-10
JPH10119217A	1998-05-12
JPH10279705A	1998-10-20
JP2014131871A	2014-07-17
JP2012140498A	2012-07-26
JPH08309847A	1996-11-26
JPS5688426A	1981-07-17

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