Title:
スピーカの振動板用フィルムの製造方法
Document Type and Number:
Japanese Patent JP6570988
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for manufacturing an inexpensive lightweight film for a vibration plate of a speaker, which has a superior mechanical characteristic, heat resistance and sound quality characteristic.SOLUTION: A method for manufacturing a film for a vibration plate of a speaker comprises the steps of: melting and kneading a mixture including 5-60 mass% of a poly(ether-ether-ketone) resin having a repeating unit expressed by the chemical formula below, and 95-40 mass% of a polyether imide resin having a repeating unit expressed by another particular chemical formula and a glass transition point of 200°C or higher into a molding material; extrusion-molding the molding material into a film for a vibration plate of a speaker; and cooling the film between a pressure roller and a cooling roller. The film for a vibration plate after cooling has characteristics as follows: a loss tangent of 0.0150 or higher at 20°C; a tensile strength of 100 N/mm; a tensile elasticity of 2000-3500 N/mm; a heat resistance of 175°C or higher; a specific weight of 1.3 or less; and a thickness of 2-150 μm.SELECTED DRAWING: None
Inventors:
Takashi Gonda
Application Number:
JP2015237828A
Publication Date:
September 04, 2019
Filing Date:
December 04, 2015
Export Citation:
Assignee:
Shin-Etsu Polymer Co., Ltd.
International Classes:
H04R7/02; B29C48/305; B29C48/84; C08J5/18; H04R31/00
Domestic Patent References:
| JP2012125934A | ||||
| JP60139098A |
Attorney, Agent or Firm:
Eisuke Fujimoto
Masayoshi Kanda
Akio Miyao
Nobuyuki Baba
Masayoshi Kanda
Akio Miyao
Nobuyuki Baba