Title:
フィルムロール
Document Type and Number:
Japanese Patent JP7243374
Kind Code:
B2
Abstract:
To provide a manufacturing method of a film roll having good winding appearance and quality without wrinkle nor charging defect, and to provide the film roll.SOLUTION: In this manufacturing method of a film roll, a cylindrical core 1 satisfying the following formula (1) is used, and further a film 2 is so wound that the degree of hardness of a film part wound in an arbitrary time after 24 hours has passed after winding complete time of the film is 90 degree or more. Here, E[GPa] is a core circumferential direction flexure elastic modulus, a[mm] is a core internal radius, and b[mm] is a core external radius.SELECTED DRAWING: Figure 2
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Inventors:
Chinese Akiyama
Takahiro Takada
Matsumoto Tadashi
Takahiro Takada
Matsumoto Tadashi
Application Number:
JP2019061078A
Publication Date:
March 22, 2023
Filing Date:
March 27, 2019
Export Citation:
Assignee:
TORAY INDUSTRIES,INC.
International Classes:
B65H75/10; B65H18/28
Domestic Patent References:
| JP9057872A | ||||
| JP2005040963A | ||||
| JP2017177530A | ||||
| JP2006205536A | ||||
| JP2017165588A | ||||
| JP2001253642A | ||||
| JP2017128080A |
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