METHOD FOR PREPARING FOAM MATERIALS BY GENERATING SUPERCRITICAL BUBBLES

Abstract

The invention relates to the field of foam technology, specifically to group C08G101 / 00. A method for preparing chlorinated polyethylene-containing material by supercritical foaming includes the following steps: (1) adding chlorinated polyethylene-containing material to a reactor, adding water and a seeding agent, and then closing the reactor lid; (2) heating to a temperature between 50°C and 80°C; (3) introducing supercritical carbon dioxide into the reactor so that the supercritical polyethylene-containing material reaches supercritical carbon dioxide saturation; and (4) removing the chlorinated polyethylene-containing material; and processing for 1 to 5 minutes in an environment with a temperature between 100°C and 150°C.The preparation method is simple and environmentally friendly, with high efficiency and low cost; the uniformity of small pores improves the elasticity of the foamed material and also reduces the density of the material, with the density of the obtained foamed material ranging from 0.2g / cnP to 0.3g / cnP and having thin cell walls.