Title:
METHOD FOR MANUFACTURING MULTILAYER FILM, AND MULTILAYER FILM
Document Type and Number:
WIPO Patent Application WO/2022/050163
Kind Code:
A1
Abstract:
[Problem] To provide: a multilayer film that has excellent adhesion and includes a polymer layer for which the ratio of the thickness of an end relative to the thickness of the center is adjusted to a prescribed range; and a method for manufacturing the same. [Solution] A multilayer film according to the present invention comprises: a polymer film having a surface that has been treated to enhance the surface tension of the polymer film; and a polymer layer which is formed on the surface of the polymer film and contains a tetrafluoroethylene polymer. The ratio of the thickness of an end of the polymer layer relative to the thickness of the center of the polymer layer is 1.1 or lower. The method for manufacturing the multilayer film is characterized by: coating a surface of a polymer film, that has been treated to enhance surface tension, with a liquid composition containing tetrafluoroethylene polymer powder and a liquid dispersion medium having a surface tension of at least 30 mN/m, the content of the powder being at least 10% by mass; and then heating the coating, to obtain a multilayer film on which a polymer layer is formed on the surface of the polymer film.
Inventors:
YUKI SOTA (JP)
KASAI WATARU (JP)
MITSUNAGA ATSUMI (JP)
KASAI WATARU (JP)
MITSUNAGA ATSUMI (JP)
Application Number:
PCT/JP2021/031309
Publication Date:
March 10, 2022
Filing Date:
August 26, 2021
Export Citation:
Assignee:
AGC INC (JP)
International Classes:
B05D7/24; B32B27/30; C08J7/00; C08J7/04; H05K1/03
Domestic Patent References:
| WO2019131809A1 | 2019-07-04 |
Foreign References:
| JPS62162543A | 1987-07-18 | |||
| JP2011105012A | 2011-06-02 | |||
| JPH02235940A | 1990-09-18 | |||
| JPH02194876A | 1990-08-01 | |||
| JPH0711028A | 1995-01-13 |
Attorney, Agent or Firm:
KOMAI Shinji et al. (JP)
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