| 摘要 |
Abrasive chips obtained by extrusion or moulding comprise a thermoplastic resin mixture and abrasive material. Regenerated polyethylene terephtalate (PET) as thermoplastic resin, and powder from recovered abrasive grinding wheels as abrasive material, are particularly suitable to this aim. Such formulations allow important savings in raw matters and enable obtaining two subsequent steps of strong removal and polishing, respectively, in the same working cycle and in the same apparatus by using the same abrasive chips. |
