| 摘要 |
PROBLEM TO BE SOLVED: To provide a projecting material for blast process to remove the burr of a molded article, especially of a resin molded article, which can remove the burr effectively without impairing the surface appearance of the molded article and prevent the generation of static electricity by the projecting material. SOLUTION: The projecting material is formed by mixing (A) a thermoplastic resin at a weight ratio of 100 with (B) a antistatic agent at a weight ratio of 0.01 to 6. The projecting material has a Rockwell hardness number at R scale of 70 to 120, a specific gravity of 1.3 or less, and the grain diameters of the projecting material are made to be within 16 mesh pass and 100 mesh on. COPYRIGHT: (C)2003,JPO
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