METHOD FOR PRODUCING THE FUNCTIONAL EXPANDED POLYSTYRENE WHICH HAVE THE HIGH CLOSED CELL CONTENTS

摘要

The present invention relates to a method for producing a foaming polystyrene bead for producing polystyrene foam that contains inorganic particles having a size of severalμm to tens ofμm but has a bubble size of 200μm or less and a high closed cell content. The foaming polystyrene bead for producing polystyrene foam that has a bubble size of 200μm or less and a high closed cell content is produced through a step of adding a styrene-based monomer and a thermal stabilizer in a pellet-shaped seed or a polystyrene bead containing inorganic particles to be polymerized in an aqueous environment and injecting a foaming agent. Considering that general polystyrene foam has a bubble curtain having a thickness of about 2μm, the polystyrene foam provided by means of the method contains functional inorganic particles having a size of severalμm to tens ofμm causing foam breaking of a bubble curtain but has a bubble size of 200μm or less and a high closed cell content, so that compression strength and curvature strength are excellent and a molded product is not shrunken.