Speaker Diaphragm
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United States of America Patent
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N/A
Issued Date -
Jan 31, 2008
app pub date -
Aug 19, 2004
filing date -
Aug 19, 2004
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A smaller-sized and acoustically excellent speaker diaphragm is inexpensively provided using the mixture of a specially surface-coated woody material and a mass-producible synthetic resin. The mixture is composed of a non-chlorinated synthetic resin and a powdery cellulose material whose particle size falls within a range of from 5 .mu.m to 500 .mu.m. The cellulose material has been subjected to a surface treatment to enhance its affinity to the non-chlorinated synthetic resin, and 30% to 70% by weight of the cellulose material is contained in the mixture.
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