Abstract
Solvent debinding of injection molded metal powder by organic solvents of N-Metylprrolidone(NMP, f.p.91.0°C) was studied. The organic binder was composed of polyplopylene, paraffin wax(Pwax), urethane wax(Uwax) and acrylic wax(Awax).The Uwax was suitable for rapid solvent debinding with NMP. NMP had excelent properties that was high flashing point, low virulent and water soluble.NMP cooled from 70°C of the solvent debinding tempurature to room tempurature after the solvent debinding was deposited Pwax and Awax.The solvent mixtures, an addition of water to the solvent, was deposited Uwax.Therefore it is possible for solvent debinding with NMP to recycle of the elemets of wax and the solvent for distillation. To weed out NMP from green body had to dry in vacuum at 100°C over 22.5 hours. Therefore the thermal debinding was given with use of the solvent debound body that was no drying Thus the solvent debound body that was extraction ratio of wax over 15% was no deformation as the thermal debinding. In spite of the fact, it was proved that NMP can be effectively used as substitute for the conventional solvent.
