DIAPHRAGM SHEET FOR MAKING VIBRATING DIAPHRAGM AND METHOD OF FORMING VIBRATING DIAPHRAGM, AND COMPOSITE VIBRATING DIAPHRAGM

摘要

The present application relates to a membrane and a method for producing a diaphragm, and a composite diaphragm. The MCPET material is a MCPET baffle with micropores independent from each other; wherein an average size of the micropore is smaller than or equal to 5µm, a foaming rate of the MCPET baffle is less than 2 times, and a density of the MCPET baffle is less than 300kg/m 3 . The MCPET baffle is further processed by means of layered cut to form the membrane that is thinner than the MCPET baffle. At least one surface with micropores is exposed to form a micropore exposed surface. The membrane is heated under a temperature of 130-140–¡ to form the diaphragm. The composite diaphragm includes a main diaphragm and an auxiliary diaphragm, wherein the main diaphragm is made of the membrane of the present application. Compared with the prior art, the diaphragm made of the membrane has an superior sound performance.