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Title:
BIAXIALLY ORIENTED POLYESTER FILM
Document Type and Number:
Japanese Patent JP2007138182
Kind Code:
A
Abstract:

To provide a polyester film excellent in toughness and impact resistance.

The biaxially oriented polyester film has a density of 1.37-1.41 g/cm3 and a relaxation time T1ρ of diol carbon determined through a structural analysis by solid high-resolution NMR of ≥50 msec and ≤100 msec. On at least one side of the biaxially oriented polyester film, a layer made of a polyester containing ethylene terephthalate having a melting point of 250-270°C as a main repeating unit is laminated in a thickness range of ≤30% based on the thickness of the whole film.


Inventors:
TANAKA HIROYUKI
TANAKA KUNIMASA
YOSHIDA MINORU
Application Number:
JP2006349062A
Publication Date:
June 07, 2007
Filing Date:
December 26, 2006
Export Citation:
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Assignee:
TORAY INDUSTRIES
International Classes:
C08J5/18; B29C55/12; B32B27/36; C08L67/02; B29K67/00; B29L7/00
Domestic Patent References:
JPH11302406A1999-11-02
JPH1149874A1999-02-23
JP2000129106A2000-05-09
JPH10324754A1998-12-08



 
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