Title:
HEAT-SHRINKABLE POLYESTER FILM
Document Type and Number:
WIPO Patent Application WO/2014/034704
Kind Code:
A1
Abstract:
Provided is a heat-shrinkable polyester film which has high mechanical strength in a width direction that is perpendicular to the main shrinking direction and high tensile fracture elongation in the film width direction after being subjected to an aging treatment for a long time in a high-temperature environment, and can be produced using substantially no amorphous PET raw material, and can also be produced from only homo-PET.
A heat-shrinkable polyester film, which is made from a polyester resin, wherein the polyester resin contains ethylene terephthalate as the main component and contains a monomer component that can serve as an amorphous component in an amount of 0 mol% or more and less than 1 mol% relative to the total amount of all of polyester resin components, and wherein each of the shrinkage factors by hot blast in the length direction at 90˚C and 140˚C, the shrinkage factor by hot blast in the width direction at 140˚C and the fracture elongation in the width direction after being aged at 60˚C for 672 hours of the film is adjusted to a value falling within a specified range.
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Inventors:
HARUTA MASAYUKI (JP)
ISHIMARU SHINTARO (JP)
ENDO TAKURO (JP)
ISHIMARU SHINTARO (JP)
ENDO TAKURO (JP)
Application Number:
PCT/JP2013/072971
Publication Date:
March 06, 2014
Filing Date:
August 28, 2013
Export Citation:
Assignee:
TOYO BOSEKI (JP)
International Classes:
B29C61/06; B29C55/14; B29K67/00; B29K105/02; B29L7/00
Domestic Patent References:
| WO2009075333A1 | 2009-06-18 | |||
| WO2011125435A1 | 2011-10-13 |
Foreign References:
| JPH09239833A | 1997-09-16 |
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