WERKWIJZE EN INRICHTING VOOR HET TERUGWINNEN VAN UITGANGSMATERIALEN UIT MAGNEETBANDAFVAL.

摘要

Raw materials are reclaimed from magnetic tape scrap by cutting the scrap into small pieces; treating the cut scrap with aqueous alkali solution; stirring the alkali-treated scrap at high speed thereby completely separating them into tape substrate and magnetic powder; washing the scrap with water and draining it; stirring only the tape substrate fragments at high speed under vacuum and at a temperature not exceeding the melting point of the material of the tape substrate and thereby drying the fragments and curling them into twisted strings having a moisture content not exceeding 0.01%; and feeding the twisted strings in their unaltered form into an extrusion pelletiser where they are pelletised.