Title:
熱収縮性ポリエステル系フィルムロール
Document Type and Number:
Japanese Patent JP7288400
Kind Code:
B2
Abstract:
An object of the present invention is to provide a heat-shrinkable polyester film roll that has good winding characteristics, particularly has little winding core wrinkling and an end face displacement.A heat-shrinkable polyester film roll comprising:a paper tube,a heat-shrinkable polyester film having a shrinking rate in a main shrinking direction of the film after treated in hot water at 90°C for 10 seconds of 40% or more, andthe film being wound around the paper tube to form the heat-shrinkable polyester film roll,wherein the heat-shrinkable polyester film and the film roll satisfy the following requirements (1) to (6):(1) a film winding length is 2000 m or more and 20000 m or less;(2) a film width is 400 mm or more and 2500 mm or less;(3) a film thickness is 5 µm or more and 30 µm or less;(4) unevenness in thickness in a film widthwise direction in a film roll surface layer part is 12% or less;(5) the paper tube has an inner diameter of 3 inches, a difference in clearance of the paper tube in a widthwise direction after removal of the film from the film roll is 0.5 mm or less, and a flat compressive strength of the paper tube after removal of the film is 1700 N/100 mm or more; and(6) an average value of winding hardness in a widthwise direction in the film roll surface layer part is 500 or more and 850 or less.
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Inventors:
Masayuki Haruta
Ki Tahoda
Ki Tahoda
Application Number:
JP2019507874A
Publication Date:
June 07, 2023
Filing Date:
January 28, 2019
Export Citation:
Assignee:
Toyobo Co., Ltd.
International Classes:
B29C55/08; B29C61/06; B65H18/28
Domestic Patent References:
| JP2008195061A | ||||
| JP201724382A | ||||
| JP2007262365A | ||||
| JP2004203545A |