POLYESTER FILMS - TOYO BOSEKI

Title:

POLYESTER FILMS

Document Type and Number:

WIPO Patent Application WO/2003/059996

Kind Code:

A1

Abstract:

A polyester film which is made of a blend comprising 10 to 90 wt% of a polyester (A) mainly composed of ethylene terephthalate units and 90 to 10 wt% of a crystalline polyester (B) different from the polyester (A) and exhibits a half width of recrystallization peak of 0.25 or below as determined by the use of a differential scanning calorimeter (DSC) under temperature-fall conditions. The crystalline polyester (B) is preferably one selected from among polybutylene terephthalate (PBT), polytrimethylene terephthalate (PTT), and polyethylene 2,6-naphthalate (PEN). The film has excellent mechanical characteristics and high crystallinity and does not cause whitening even when heated as such or in a state laminated with metal sheet to a temperature near or over the melting point of the film, thus being excellent in decorativeness. Further, the film can be improved in mar resistance by properly controlling the reduced viscosity and the recrystallization peak temperature.

Inventors:

ITOH KATSUYA (JP)
HIGASHIURA SHINYA (JP)
KOTANI TORU (JP)
FUJITA SHINJI (JP)

Application Number:

PCT/JP2003/000095

Publication Date:

July 24, 2003

Filing Date:

January 09, 2003

Export Citation:

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Assignee:

TOYO BOSEKI (JP)
ITOH KATSUYA (JP)
HIGASHIURA SHINYA (JP)
KOTANI TORU (JP)
FUJITA SHINJI (JP)

International Classes:

B32B15/08; B32B27/20; B32B27/36; C08J5/18; (IPC1-7): C08J5/18; B32B15/08

Domestic Patent References:

WO2000009593A1

2000-02-24

Foreign References:

JP2001335682A	2001-12-04
JPH10110046A	1998-04-28
JPH09143349A	1997-06-03
JPH08120068A	1996-05-14
JPH083430A	1996-01-09
JP2003026824A	2003-01-29
JP2002275273A	2002-09-25
JP2002069277A	2002-03-08

Other References: