| 摘要 |
PURPOSE:To improve the frequency characteristic of a diaphragm for speaker, by using a polyether aromatic ketone system resin. CONSTITUTION:The polyether aromatic keton system resin having a structural formula as shown as the resin for deaphragm forming and consisting of a hydroquinone and a 4,4'-dihalobenzophenone is used. A cone type diaphragm, 40mm.phi in diameter and 80mum in thickness is obtained by forming the diaphragm with the compressed forming method. |
