Title:
熱収縮性ポリエステル系フィルム
Document Type and Number:
Japanese Patent JP7302694
Kind Code:
B2
Abstract:
To provide a heat shrinkable polyester-based film having a high heat shrinkage rate in the width direction and small thickness unevenness.SOLUTION: There is provided a heat shrinkable polyester-based film containing 90 mol% or more of an ethylene terephthalate unit in 100 mol% of all ester units which satisfies the following requirements (1) to (5). (1) The heat shrinkage rate in the width direction when shrinking in hot water of 90°C for 10 seconds is 50% or more and 75% or less. (2) The heat shrinkage rate in the longitudinal direction when shrinking in hot water of 90°C for 10 seconds is -6% or more and 14% or less. (3) The heat shrinkage rate in the longitudinal direction when shrinking in hot water of 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
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Inventors:
Shintaro Ishimaru
Masayuki Haruta
Masayuki Haruta
Application Number:
JP2022046742A
Publication Date:
July 04, 2023
Filing Date:
March 23, 2022
Export Citation:
Assignee:
Toyobo Co., Ltd.
International Classes:
B29C55/08; C08J5/18; B29C61/02; B65D65/02
Domestic Patent References:
| JP7056325B2 | ||||
| JP2014195944A | ||||
| JP2016193491A | ||||
| JP2019178194A | ||||
| JP5305663A | ||||
| JP3224723A |
Foreign References:
| KR101685181B1 |
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