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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an enlarged perspective view showing a fiber
structure of a conventional speaker diaphragm, and FIG. 2 is an enlarged perspective view
showing a fiber structure in an embodiment of a loudspeaker for a sbyker according to the
present invention. FIG. 3 is an elastic modulus comparison characteristic diagram. Plastic resin. 73-50-63032 (2) Fig. 3-74-
DETAILED DESCRIPTION OF THE INVENTION The present invention seeks to provide a speaker
diaphragm having a stable elastic pressure and stable sound pressure-frequency characteristics
without occurrence of split resonance. In general, the first condition of the one-b characteristic
required for the speaker diaphragm is that the elastic modulus (Young's modulus) is high, and if
the elastic modulus is low, split resonance occurs on the cone surface itself of the diaphragm at
low frequencies, The sound pressure of a specific frequency will be reduced. Conventionally, in
order to improve the elastic modulus, as a constitution and a reinforcing material for binding a
fiber-function with a binder of a thermoplastic resin, a modulus of the single crystal fiber is 4/4.
flL♂-7onj! ? It has been considered to mix bird whiskers with natural fibers such as pulp 2, but
in this case, it depends on the degree of beating of natural fibers such as pulp. When natural
fibers such as pulp progressed to 81 or more in beating II, the elasticity was improved by mixing
whiskers with pulp, but when the beating degree was + 5o81 or less, the elasticity was improved.
Absent. The cause of this is that if the whisker diameter × length is (0, s ˜3 μ) × (100 ˜6 oμ)
and the fiber is very fine and the fiberization of one fiber does not proceed to @ This is because
entanglement of the fibers im1 and whiskers 2 is not performed as shown in FIG. It should be
noted that the degree of beating that can be formed into a sheet of the diaphragm is preferably
2s 8R or less, because it is better to be thicker from the point of stiffness of the plate C due to the
plate of the plate etc. The present invention relates to the combination of pulp with low freeness
(10-258 R) and whiskers, and the method of production is not described. In the beater, alumina
(ILt203), iron (F,), copper 3, (Cm), ft element (8i), charcoal jl (C), and carbon element (!). 1ie) A
mixture of whiskers such as carbonized boron (B4a) and pulp fibers is used as a textile binding
agent, which is obtained by adding an organic thermally fusible resin as a starch syrup at the
same time. Thereafter, the particles of the thermoplastic resin are fixed on the whiskers and the
pulp fibers by mixing an acidic substance such as aluminum sulfate. In this state, it is possible to
sand the paper, hot air and heat press, and the fixed thermoplasticity = Lloyd particles are Smelted, wrap around whiskers, and reinforced plastic and the composite plastic of the composite
is a long fiber Combine the pulp pulp. That is, by improving the cohesion of the resin, it is a book
that increases the binding strength of the pulp fiber and improves the rigidity of the diaphragm.
The diaphragm thus obtained is constructed by aligning the valve fibers 3 with the '1' e resin 6
including the whiskers 4 as shown at 2 @ IK.
As a result of experimenting with the following materials as gs and m pieces, a large
improvement in elastic modulus was observed. 4 length length ratio o carbonized tll Sla (9 B Jfi-)
107 w X 100 μm 0 811. Binder (Acryl, Indica Marumi, N (MMA)) 8 @ Fixer (Aluminum
Aluminum) 6 @ Valve ([Conifer resin Unrefined raft pulp] N, PF KPF flag 208 R) 110 g
Comparison of the elastic modulus of the above composition, that of the pulp fiber only, that of
the pulp delicate and that of the whisker base metal is the 311! It is shown in 11. As shown in
this figure, the invention according to the present invention is clearly superior, and the
diaphragm for nupika according to the present invention can improve the elastic modulus as in
the present invention 4 or more. It is possible to prevent resonance and to obtain stable sound
pressure-frequency characteristics, which is of great practical value.