| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject composition capable of increasing the specific gravity and exhibiting excellent moldability by making the composition include a thermoplastic resin or an elastomer and a specific tungsten powder. SOLUTION: This composition comprises (A) at least one or more kinds selected from among a thermoplastic resin and a thermoplastic elastomer (preferably nylon, a polybutylene terephthalate, polypropylene, etc.), and (B) tungsten powder mainly composed of primary particles obtained by disintegrating an aggregate generated in a production process of tungsten powder. The blending ratio is 25-55 vol.% of the component A and 45-75 vol.% of the component B. The composition is set so as to make a molding product formed by injection molding, etc., from these components as a raw material have 9-15 specific gravity. Consequently, excellent filling properties and high specific gravity can be attained and improved fluidity and moldability can be expected.
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