abstract |
It is an object of the present invention tonprovide a speaker edge which is high in strength,nless in scattering of f 0 , high in waterproofness,nsmall in amplitude at the time of resonance, easy tonmold, and easy to be integrated with a cone body. n That is, the present invention provides anspeaker edge constituted by a molding which isnmolded in a manner so that a speaker edge rawnmaterial composition containing isocyanate andnpolyol is injected into a cavity of a mold by annagitating/mixing apparatus and subjected tonreaction, foaming and curing in the cavity. |