Binder removal process, the molded product, binder-free products and sintered products produced therewith

摘要

A dewaxing method by the extraction with a water solvent, which is capable of shortening the dewaxing time without the need of giving attention to a sudden decomposition, vaporization or expansion due to heat. An organic binder is dewaxed from a molded article obtained by mixing a powder and an organic binder followed by injection molding, the organic binder comprising a water-soluble organic binder component and a water-insoluble thermoplastic resin. The dewaxing step includes a step for extracting the water-soluble organic binder from the organic binder in the molded article by using water as a solvent.