Title:
FILM FOR DIAPHRAGM AND PRODUCTION METHOD THEREOF
Document Type and Number:
Japanese Patent JP2023051816
Kind Code:
A
Abstract:
To provide an inexpensive film for a diaphragm which allows arbitrary control of the elastic modulus, internal loss and density, has high heat resistance, and exhibits properties suitable in particular for a diaphragm for a small speaker.SOLUTION: A film for a diaphragm is a stretched film containing a semi-aromatic polyamide resin, where the tensile elasticity is 2.0-2.8 GPa, the loss tangent at 20°C is from 0.010 to 0.020, and the thermal stability constant ΔD is less than 1.50.SELECTED DRAWING: None
Inventors:
NAKAHARA JUNICHI
HAGIWARA KEITA
HAGIWARA KEITA
Application Number:
JP2022153168A
Publication Date:
April 11, 2023
Filing Date:
September 27, 2022
Export Citation:
Assignee:
UNITIKA LTD
International Classes:
C08J5/18; H04R7/02; H04R31/00
Attorney, Agent or Firm:
Morimoto International Patent Office