Speaker diaphragm molded from poly-biphenol phthalate type resin

Details Speaker diaphragm molded from poly-biphenol phthalate type resin Speaker diaphragm molded from poly-biphenol phthalate type resin

1977-09-26

1979-11-06

Lee, Lester L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

181157, 528176, G10K 1303

Patent

active

041737016

ABSTRACT:
A speaker diaphragm molded from a poly-bisphenol phthalate type plastic film having ester linkages prepared from an aromatic dicarboxylic acid such as isophthalic acid or terephthalic acid or a mixture thereof and a bifunctional phenol such as bisphenol A. This speaker diaphragm has an excellent low-pitched sound reproducing performance and is further featured by the flat acoustic pressure-frequency characteristic and improved transduce efficiency.

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