<p>A smaller-sized and acoustically excellent speaker diaphragm is inexpensively provided using the mixture of a specially surface-coated woody material and a mass-producible synthetic resin. The mixture is composed of a non-chlorinated synthetic resin and a powdery cellulose material whose particle size falls within a range of from 5 µm to 500 µm . The cellulose material has been subjected to a surface treatment to enhance its affinity to the non-chlorinated synthetic resin, and 30 % to 70 % by weight of the cellulose material is contained in the mixture.</p>
申请公布号
EP1781064(A1)
申请公布日期
2007.05.02
申请号
EP20040771870
申请日期
2004.08.19
申请人
OG CORPORATION;MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.