Title:
MULTILAYER FILM AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2021/166930
Kind Code:
A1
Abstract:
[Problem] To provide a method for manufacturing a multilayer film having excellent adhesion and drilling workability and having no wrinkles or extremely few wrinkles, to provide said multilayer film, and also to provide a method for manufacturing a multilayer film with improved interlayer adhesion, and to provide said multilayer film. [Solution] This method for manufacturing a multilayer film includes: disposing a liquid composition containing powder of a thermally fusible tetrafluoroethylene polymer on the surface of a layer containing polyimide having a glass transition point; and applying heat at a temperature that is higher than the melting point of the tetrafluoroethylene polymer and that is at the polyimide glass transition point+40°C or lower, thereby forming a layer containing the tetrafluoroethylene polymer. Another method for manufacturing a multilayer film includes: disposing a liquid composition containing powder of a thermally fusible tetrafluoroethylene polymer and a thermally degradable polymer on the surface of a polyimide film layer; and applying heat to form a layer containing the tetrafluoroethylene polymer.
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Inventors:
YUKI SOTA (JP)
KASAI WATARU (JP)
YAMABE ATSUMI (JP)
KASAI WATARU (JP)
YAMABE ATSUMI (JP)
Application Number:
PCT/JP2021/005829
Publication Date:
August 26, 2021
Filing Date:
February 17, 2021
Export Citation:
Assignee:
AGC INC (JP)
International Classes:
B32B27/30; B32B27/32; B32B27/34; B32B33/00; C08J7/04; C08L27/08; C08L33/16; C08L79/08; H05K1/03
Domestic Patent References:
| WO2018016644A1 | 2018-01-25 |
Foreign References:
| JP2019166844A | 2019-10-03 | |||
| JP2011162581A | 2011-08-25 | |||
| JP2015110697A | 2015-06-18 |
Attorney, Agent or Firm:
KOMAI Shinji et al. (JP)
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