EDGE MATERIAL FOR MICROSPEAKER DIAPHRAGM, MICROSPEAKER EMPLOYING THE EDGE MATERIAL FOR MICROSPEAKER DIAPHRAGM, AND ELECTRONIC APPLIANCE EMPLOYING THE MICROSPEAKER

摘要

An edge material for microspeaker diaphragms which is improved in heat resistance, cold resistance, moisture resistance, moldability, high internal loss, etc. The edge material for microspeaker diaphragms is obtained by heat-forming an elastomer sheet. The elastomer sheet is one made only of a polyester elastomer comprising a polyester resin having the structural formula given under the following [Chemical formula (1)] or of a mixture of the polyester elastomer and a functional elastomer such as a urethane elastomer as an internal additive, or is one obtained by disposing the functional elastomer on one or each side of a sheet of the polyester elastomer or between two sheets of the polyester elastomer.