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Title:
METHOD FOR PRODUCING DIAPHRAGM FILM
Document Type and Number:
Japanese Patent JP2018183914
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing a film for a diaphragm which can obtain heat resistance of 150°C or more and can improve durability.SOLUTION: A molding material 1 is prepared by melt-kneading polyether ether ketone resin and fullerene, a film 2 is continuously extruded from a T-die 13 using the molding material 1, and the extruded film 2 is cooled while sandwiched between a pressure bonding roll 17 and a cooling roll 18 so that the cooled film 2 has a thickness of not less than 2 μm and not more than 110 μm, and the mechanical characteristics of the film 2 after cooling are 90 N/mmor more in tensile maximum strength at 23°C and 100% or more in tensile elongation at break, the heat-resistant characteristics of the cooled film 2 is 80 N/mmor more in tensile maximum strength at 150°C and 400% or more in tensile elongation at break, and the acoustic characteristics of the film 2 are 1.2 or more and 1.4 or less in specific gravity at 23°C and 0.010 or more in loss tangent at 20°C.SELECTED DRAWING: Figure 1

Inventors:
GONDA TAKASHI
MAMADA KAZUYUKI
SHIMIZU TERUO
Application Number:
JP2017086420A
Publication Date:
November 22, 2018
Filing Date:
April 25, 2017
Export Citation:
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Assignee:
SHINETSU POLYMER CO
International Classes:
B29C47/88; B29C48/92; H04R31/00
Attorney, Agent or Firm:
藤本 英介
神田 正義
宮尾 明茂
馬場 信幸



 
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