金属注射成形用新型聚乙二醇基粘结剂的研究

A Novel PEG-Based Binder for Metal injection Molding

摘要:

研究了一种新型聚乙二醇（PEG）基热塑性粘结剂，它由高密度聚乙烯、聚乙二醇、聚合物W、硬脂酯、邻苯二甲酸和二辛脂和抗氧剂等组成。新型PEG基粘结剂与Fe-2Ni粉具有较强的相互作用，混合均匀性好，且粉末装载量高，喂料注射成形性好。用新型PEG基粘结剂和Fe-2Ni粉所制备的喂料是一种假塑性流体，具有良好的流变性能。新型PEG基粘结剂用乙醇溶剂脱脂，速度快、缺陷少、维形能力强，且可避免环境污染。

Abstract:

A novel PEG--based binder for metal injection molding (MIM) has been studied. The novel binder is made of high- density polyethylene (HDPE), polyethylene glycol (PEG), polymer W, stearic acid(SA) and dioctyl phthalate (DOP). The binder has strong adhesive to Fe-2Ni powder and high solid loading, and could easily mix with powders to obtain a homogeneous feedstock. The feedstock exhibits good molding behavior. The feedstock possesses pseudo plasticity and exhibits good rheological properties. The binder could easily be removed in a short time in ethanol without defects, and environmental concern associated with other solvents are avoided.