ACOUSTIC MATERIAL

PCT No. PCT/JP88/00836 Sec. 371 Date Apr. 14, 1989 Sec. 102(e) Date Apr. 14, 1989 PCT Filed Aug. 22, 1988 PCT Pub. No. WO89/02207 PCT Pub. Date Mar. 9, 1989.This invention provides an acoustic material having high elastic modulus and large internal loss by subjecting a high-modulus stretched polyeth...

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Hauptverfasser: NISHI, YOSHIO, YAGI, KAZUO, URYU, MASARU
Format: Patent
Sprache:eng
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Zusammenfassung:PCT No. PCT/JP88/00836 Sec. 371 Date Apr. 14, 1989 Sec. 102(e) Date Apr. 14, 1989 PCT Filed Aug. 22, 1988 PCT Pub. No. WO89/02207 PCT Pub. Date Mar. 9, 1989.This invention provides an acoustic material having high elastic modulus and large internal loss by subjecting a high-modulus stretched polyethylene containing paraffin wax to plasma treatment. When the acoustic material of the present invention is used for a diaphragm of a speaker, for example, it is possible to suppress the fluctuation of frequency characteristics resulting from split vibration, decrease harmonic distortion and improve transient characteristics.