HEAT-SHRINKABLE POLYESTER FILM

Title:

HEAT-SHRINKABLE POLYESTER FILM

Document Type and Number:

WIPO Patent Application WO/2015/118968

Kind Code:

A1

Abstract:

[Problem] To provide a heat-shrinkable polyester film that does not contain a large amount of a monomer component that can become an amorphous component, that has sufficient heat shrinkage characteristics in a main shrinkage direction that is the lengthwise direction, that has a low heat shrinkage rate in a width direction that is orthogonal to the main shrinkage direction, that exhibits very few flaws on the film surface thereof, that has high mechanical strength, that has a small molecular orientation angle difference, and that exhibits little thickness unevenness. [Solution] A heat-shrinkable polyester film that comprises ethylene terephthalate as a main constituent, that contains 0-5 mol% of a monomer component that can become an amorphous component relative to the total of a polyester resin component, in which the main shrinkage direction is the lengthwise direction, and in which the heat shrinkage characteristics in the lengthwise direction and the width direction and a molecular orientation difference that is the difference between the molecular orientation angle of the edge of one end in the width direction and the molecular orientation angle of the edge of the other end are within a specified range.

Inventors:

INOUE MASAFUMI (JP)
HARUTA MASAYUKI (JP)

Application Number:

PCT/JP2015/051870

Publication Date:

August 13, 2015

Filing Date:

January 23, 2015

Export Citation:

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Assignee:

TOYO BOSEKI (JP)

International Classes:

B29C61/06; B29C55/14; C08J5/18

Foreign References:

JP2008274160A	2008-11-13
JP2009226935A	2009-10-08
JP2009143043A	2009-07-02
JP2009226939A	2009-10-08
JP2000178367A	2000-06-27
JP2007016120A	2007-01-25
JP4411556B2	2010-02-10

Other References: