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AssigneeAdvanced Materials Technologies Pte. Ltd.
InventorsJian G. Zhang, Dunstan H. Peiris
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The disclosure relates to a binder, and the method of formulating the said binder, which is suitable for shaping parts from metallic and/or ceramic particles by injection molding. The binder comprises materials that are mainly thermoplastics, each of which having a percentage that is determined by its thermogravimetric analysis (TGA) profile and a weight loss versus highest binder removal rate from a green body by progressive heating. The removal of this binder from the green body is performed within a much shorter period of time than those published in the prior art. An example binder comprises 40-70% HDPE, 18-30% Paraffin wax, 10-25% microcrystalline wax and 2-5% stearic acid. Another binder comprises 35-65% PP, 23-35% paraffin wax, 10-25% microcrystaline wax and 2-5% stearic acid.
A process of binder removal, comprising heating a green body that contains metal powders and said binder selected from a binder comprising 50% polyethylene, 20% parrafin wax, 25% microcrystalline wax and 5% stearic acid and a binder comprising 45% polypropylene, 25% parrafin wax, 25% microcrystalline wax and 5% stearic acid according to the temperature profile in FIG. 2.
Dependencies are inferred from the claim text.