| 摘要 |
PURPOSE:To obtain the title resin particles improved in release of an antistatic agent during granulation, by applying an antistatic agent to the surfaces of thermoplastic resin particles by using a high shearing force and impregnating the resin particles with a blowing agent in an aqueous medium. CONSTITUTION:An antistatic agent is mixed with thermoplastic synthetic resin particles by agitation under a high shearing force, whereupon the antistatic agent is adhered to the surfaces of the resin particles while their surface layers are kept softened. The resulting particles are impregnated with a blowing agent in an aqueous medium. Any of cationic, anionic, nonionic and amphoteric compounds can be used as said antistatic agent. Although it can take a liquid or powder from, it is preferable that the liquid is lowly viscous and the powder is fine. Suitable examples of mixers as means for mixing by agitation under a high shearing force include fixed container-type high-speed flow type mixers such as Henschel mixers and super mixers.
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