MICA ACOUSTIC DIAPHRAGM

The mica speaker diaphragm is a product which has a favorable sharpness of resonance curve with a high specific Young's modulus and superior weather resistance.

We are the first in the world to develop the mica acoustic diaphragm for loudspeakers, since then, the mica diaphragm has been used in numerous loudspeakers including cones, coupling cones, skin for flat-shaped loudspeakers, and voice coil bobbins. A flat-shaped foamed mica acoustic diaphragm has also been developed for flat shaped loudspeakers.

 

MICA ACOUSTIC DIAPHRAGM

Symbol
Composition
Construction  and main Uses
Thickness
(mm)
Density P(g/cm2)
Young's modulus E(N/m2)
Speed of
 Sound
Mica
Binder
S6EI-K
Muscovite mica paper



Epoxy
Cone-shaped mica diaphragm
0.03~0.3
1.70
6.5~7.0 X 1010
6,100 ~ 6,400
S6EI-P
Skin for honeycomb structure flat shaped diaphragm
0.02-0.2
S6E-P
C6E-K
Cone-shaped coupling mica cone
0.05<
B6E-CR
Curled mica for voice coil bobbin
0.05~0.13
S2FI-K
PVA,    
SBR
Cone-shaped foamed mica diaphragm
0.1~2.0
0.12
1.4~2.2 X 109
3,400 ~ 4,200
S2FI-P
Flat-shaped foamed mica diaphragm for flat-shaped loudspeaker
0.1~4.0
S2F-P

 

MICA MANUFACTURING CO. PVT.LTD.

3C, Camac Street, P.O.Box 9052,
Calcutta 700 016
INDIA
Tel: +91-33-2229-2277/2229-4505
Fax:+91-33-2229-5216/2474-7959

  E-mail :micamafco@vsnl.net