A foamable composition comprises in admixture (a) a high molecular weight thermoplastic resin in particulate form and an effective amount of (b) a foaming agent therefor comprising a pumpable liquid dispersion comprising (i) a solid blowing agent, (ii) a liquid carrier, and, optionally, (iii) a thickener. The liquid dispersion can be pumped directly into the hopper of a foam molding machine eliminating the need to pre-mix pelletized concentrates of the solid blowing agent.
一种可发泡组合物包括以下混合物:(a) 颗粒状高分子量热塑性
树脂;(b) 有效 用量的发泡剂,包括可泵送的液体分散体,其中(i) 固体发泡剂;(ii) 液体载体;(iii)
增稠剂。液体分散体可直接泵入泡沫塑料成型机的料斗中,无需预先混合固体发泡剂的颗粒浓缩物。