Production of foamed polyolefin resin particle

Abstract

Abstract Translated from Japanese (57)【要約】 【目的】 密閉容器内で分散媒に分散させた発泡性の樹 脂粒子を容器内から低圧下に放出して発泡粒子を得る方 法において、分散剤の使用量が少なくても樹脂粒子の融 着を確実に防止できるとともに、得られた発泡粒子を成 型する際には粒子相互の融着性を阻害せずに優れた成型 性の発泡粒子が得られ、多量の分散剤添加による分散媒 の廃水処理等のコスト上昇問題を解決したポリオレフィ ン系樹脂発泡粒子の製造方法を提供する。 【構成】 密閉容器内においてポリレフィン系樹脂粒子 を、分散剤としての微粒状のケイ酸塩鉱物と二酸化炭素 系発泡剤とともに分散媒に分散させて加熱し、樹脂粒子 に発泡剤を含浸させた後、樹脂粒子と分散媒とを容器内 より低圧下に放出して発泡させる。 (57) [Summary] [Objective] In a method for obtaining foamed particles by releasing foamable resin particles dispersed in a dispersion medium in a closed container from a container under a low pressure, even if the amount of dispersant used is small. It is possible to reliably prevent fusion of resin particles, and when molding the obtained expanded particles, foamed particles of excellent moldability can be obtained without impairing the fusion property of particles, and a large amount of dispersant added Provided is a method for producing expanded polyolefin resin particles, which solves the problem of cost increase such as wastewater treatment of a dispersion medium due to. [Structure] In a closed container, polyrefine resin particles are dispersed in a dispersion medium together with finely divided silicate minerals as a dispersant and a carbon dioxide-based foaming agent and heated to impregnate the resin particles with the foaming agent. The resin particles and the dispersion medium are discharged from the container under a low pressure to foam.

Inventors

• 👤 Toshio Tokoro
• 👤 寿男 所
• 👤 Akira Shiotani
• 👤 暁 塩谷
• 👤 Teru Hinokawa
• 👤 輝 火ノ川

Bibliographic Details