BIAXIALLY ORIENTED POLYESTER FILM AND RELEASE FILM

Title:

BIAXIALLY ORIENTED POLYESTER FILM AND RELEASE FILM

Document Type and Number:

WIPO Patent Application WO2004081090

Kind Code:

A8

Abstract:

A biaxially oriented polyester film made of a polyester comprising 1,4-cyclohexanedicarboxylic acid units and 1,4-cyclohexanedimethanol units as major repeating units and having a melting point of 200°C or higher, wherein the machine-direction and transverse-direction thermal shrinkages at 130°C are both 5% or lower and the total light transmittance is 90% or higher. The biaxially oriented polyester film has excellent heat resistance although the polyester is aliphatic. It further has the satisfactory transparency inherent in aliphatic polyesters and is suitable for use in optical applications.

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Inventors:

MASUDA NARIHIRO (JP)

Application Number:

PCT/JP2004/001529

Publication Date:

October 27, 2005

Filing Date:

February 13, 2004

Export Citation:

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Assignee:

MITSUBISHI POLYESTER FILM CORP (JP)
MITSUBISHI CHEM CORP (JP)
MASUDA NARIHIRO (JP)

International Classes:

B29C33/68; B32B27/36; C08G63/199; C08J5/18; G02B1/10; G02F1/1335; (IPC1-7): C08J5/18; C08J7/04; B29C55/12; B32B27/36; G02B1/04

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