Title:
METHOD FOR PRODUCING FILM
Document Type and Number:
WIPO Patent Application WO/2023/249053
Kind Code:
A1
Abstract:
[Problem] To provide a method for producing a film such that during the production of the film, no breakage, tearing or anomalies in external appearance are caused to the film not only at the central part of the film but also at both fixed edges of the film or the vicinity thereof. [Solution] This method for producing a film comprises: a step A in which fixtures are set at both edges in the width direction of one surface of a not-yet-heat-treated film, and the not-yet-heat-treated film is fixed in place using the fixtures; a step B in which hot air is blown onto both surfaces of the not-yet-heat-treated film; and a step C in which the not-yet-heat-treated film is conveyed. In the step B, the speed of the hot air blown onto the surface where the fixtures are not set is greater than or equal to the speed of the hot air blown onto the surface where the fixtures are set.
Inventors:
MIZUGUCHI DENICHIROU (JP)
YONEMUSHI HARUMI (JP)
WAKUI HIROYUKI (JP)
KITAMURA KOUTA (JP)
YONEMUSHI HARUMI (JP)
WAKUI HIROYUKI (JP)
KITAMURA KOUTA (JP)
Application Number:
PCT/JP2023/022937
Publication Date:
December 28, 2023
Filing Date:
June 21, 2023
Export Citation:
Assignee:
TOYO BOSEKI (JP)
International Classes:
B29B13/02; B29C55/08; C07F1/10
Foreign References:
| JP2011183724A | 2011-09-22 | |||
| JP2006346929A | 2006-12-28 | |||
| JP2019090843A | 2019-06-13 | |||
| JPH0596619A | 1993-04-20 |
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