PURPOSE: To produce performed styrene resin particles that will highly be formed, by bringing styrene resin particles containing 50wt% or more styrene that are impregnated with an organic foaming agent into contact with steam under pressure not less than the atmospheric pressure so that the particles are heated.
CONSTITUTION: A foaming agent (e.g. aliphatic hydrocarbons, such as butane, propane, and halogenated hydrocarbons such as dischlorodifluoromethane) that will be in the gaseous state under normal pressure and temperature is added to a foamable polystyrene, the mixture is charged from hopper 6 into a foaming tank 1, and steam is blown into the foaming tank 1 by opening a steam valve 8 with the exhausting valve 10 open. After a certain pressure is attained, the blowing is terminated. This procedure is repeated. Thus prefoamed bodies are obtained that will highly be foamed.
KURINO SHIGEO
KATORI MOTOTAKE
MIYAJIMA HIROSHI
| JPS57199634A | 1982-12-07 | |||
| JPS5053487A | 1975-05-12 | |||
| JPS55123631A | 1980-09-24 | |||
| JP43018635A | ||||
| JPS52155675A | 1977-12-24 |