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Title:
HEAT-SHRINKABLE POLYESTER-BASED FILM ROLL
Document Type and Number:
WIPO Patent Application WO/2019/151196
Kind Code:
A1
Abstract:
[Problem] To provide a heat-shrinkable polyester-based film roll that exhibits good winding properties, and in particular, good resistance to winding core wrinkling and end face displacement. [Solution] A heat-shrinkable polyester-based film roll obtained by winding a heat-shrinkable polyester-based film on a paper tube, the film having a shrinkage rate in a primary film shrinkage direction of 40% or more following treatment in hot water at 90°C for 10 seconds, wherein the heat-shrinkable polyester-based film roll is characterized by satisfying requirements (1) to (6). (1) The film winding length is 2000-20,000 m. (2) The film width is 400-2500 mm. (3) The film thickness is 5-30 µm. (4) The thickness irregularity at a surface layer part of the film roll in the film width direction is 12% or less. (5) The paper tube has an internal diameter of 3 inches, the difference in clearance of the paper tube in the width direction is 0.5 mm or less after the film is removed from the film roll, and the flat pressure resistance of the paper tube is 1700 N/100 mm or more after the film is removed. (6) The average winding hardness of a surface layer part of the film roll in the width direction is 500-850

Inventors:
HARUTA, Masayuki (LTD. 10-24 Toyo-cho, Tsuruga-sh, Fukui 50, 〒9148550, JP)
TABOTA, Norimi (LTD. 2-8 Dojima Hama 2-chome, Kita-k, Osaka-shi Osaka 30, 〒5308230, JP)
Application Number:
JP2019/002800
Publication Date:
August 08, 2019
Filing Date:
January 28, 2019
Export Citation:
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Assignee:
TOYOBO CO., LTD. (2-8 Dojima Hama 2-chome, Kita-ku Osaka-sh, Osaka 30, 〒5308230, JP)
International Classes:
B29C55/08; B29C61/06; B65H18/28; B65H75/00
Foreign References:
JP2008195061A2008-08-28
JP2017024382A2017-02-02
JP2007262365A2007-10-11
JP2004203545A2004-07-22
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