Title:
熱収縮性ポリエステル系フィルム
Document Type and Number:
Japanese Patent JP7056325
Kind Code:
B2
Abstract:
To provide a heat-shrinkable polyester-based film that has a high heat shrinkage in the width direction and that has a small thickness unevenness.SOLUTION: The heat-shrinkable polyester-based film of the present invention is a heat-shrinkable polyester-based film containing 90 mol% or more of ethylene terephthalate units in 100 mol% of all ester units, and satisfies the following requirements (1) to (5). (1) the thermal shrinkage in the width direction when subjected to shrinkage in hot water at 90°C for 10 seconds is 50% or more and 75% or less, (2) the thermal shrinkage in the longitudinal direction when subjected to shrinkage in hot water at 90°C for 10 seconds is -6% or more and 14% or less, (3) the thermal shrinkage in the longitudinal direction when subjected to shrinkage in hot water at 70°C for 10 seconds is -6% or more and 6% or less, (4) the thickness unevenness in the width direction is 1% or more and 20% or less, (5) the refractive index Ny in the width direction is 1.64 or more and 1.67 or less.SELECTED DRAWING: None
Inventors:
Shintaro Ishimaru
Masayuki Haruta
Masayuki Haruta
Application Number:
JP2018069003A
Publication Date:
April 19, 2022
Filing Date:
March 30, 2018
Export Citation:
Assignee:
Toyobo Co., Ltd.
International Classes:
C08J5/18; B29C55/08; B29C61/02; B65D65/02
Domestic Patent References:
| JP2019178194A | ||||
| JP2008291200A | ||||
| JP2014195944A | ||||
| JP2019178235A |
Foreign References:
| WO2015118968A1 |
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