SHEET FOR VIBRATION-DAMPING MATERIAL

PROBLEM TO BE SOLVED: To readily produce a thin speaker edge used for a small-sized speaker and having 10-300 μm thickness and the other vibration-damping materials so as to have small thickness unevenness by sheet molding. SOLUTION: The sheet is molded from a thermoplastic elastomer comprising a mi...

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Bibliographische Detailangaben
Hauptverfasser:	JINNO ATSUSHI, KODERA YOSHIICHI, TSUCHIDA HIROYUKI
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING BLASTING CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS DEAF-AID SETS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS GENERAL PROCESSES OF COMPOUNDING HEATING LIGHTING LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS MEANS FOR DAMPING VIBRATION MECHANICAL ENGINEERING METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PUBLIC ADDRESS SYSTEMS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS SHOCK-ABSORBERS SPRINGS THEIR PREPARATION OR CHEMICAL WORKING-UP THERMAL INSULATION IN GENERAL TRANSPORTING WEAPONS WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To readily produce a thin speaker edge used for a small-sized speaker and having 10-300 μm thickness and the other vibration-damping materials so as to have small thickness unevenness by sheet molding. SOLUTION: The sheet is molded from a thermoplastic elastomer comprising a mixture of polypropylene with a styrene-based elastomer as a main component. In the sheet, a curing agent content of the styrene-based elastomer is ≤0.2 wt.% and weight mixing ratio of the polypropylene to the styrene-based thermoplastic elastomer is (90/10) to (30/70) and the thickness of the sheet is 10-300 μm and tan δ at 25°C is ≥0.09. COPYRIGHT: (C)2004,JPO&NCIPI