Diaphragm for acoustic equipment
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United States of America Patent
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-
Jun 16, 1981
Issued Date -
N/A
app pub date -
Jul 9, 1979
filing date -
May 7, 1977
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A diaphragm for acoustic equipment molded from a composition mainly consisting of a polyester-polyether block copolymer prepared by condensing a polytetramethylene-terephthalate with a poly(tetramethyleneoxide)glycol or any other polyester-polyether block copolymer. This diaphragm for acoustic equipment has an excellent low-pitched sound reproducing performance and flat acoustic pressure-frequency characteristics.
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