| 摘要 |
<p>PURPOSE:To obtain polyamide series binder, which is suitable to injection- molding of metal powder, by mixing the specific polyamide resin and amide compound with the other resin at the specific ratio. CONSTITUTION:In the case of inspecting variation of weight in N2 with a thermobalance under 5 deg.C/min raising temp. to 50mg sample as the binder for injection-molding the metal powder, 20-60wt.% one or more kinds of the polyamide resin, whose temp. for 50wt.% loss is 350-470 deg.C, to the whole and in the variation of weight in N2 with the thermobalance under 5 deg.C/min raising temp. to 50mg sample, 20-60wt.% one or more kinds of the amide compound, whose temp. for 50wt.% loss is 150-350 deg.C and molecular wt. is 135-600, to the whole, and >=60% the total of the above raw materials are to use to the whole and <=40% the balance resin except the above raw materials may be used. By using the above composite mixed material as the binder for injection- molding the metal powder, the shape keeping property after injection-molding and even at the time of degreasing is improved.</p> |
