| 摘要 |
PURPOSE:To attain a diaphragm for speaker having large exfoliating strength, impact strength and Q, by using an adhesives made of denatured ether type polyester copolymer. CONSTITUTION:As the adhesives for a surface member and a core member, a denatured alkylene ether type polyester block copolymer having an elasticity resulted from polyethylenetelephthalate composition and denatured alkylene ether telephthalate composition is used. The adhesives has an amorphous part due to the alkylene ether telephthalate composition and a crystal part due to the ethylenetelephthalate comosition. The crystal part by the ethylene telephthalate composition offers a large rigidity, withstanding an external large stress. Further, the amorphous part by the denatured alkylene ether telephthalate composition gives strength against the stress due to external vibration and impulse against an impulse input. |
