The processing of Styropor® and Neopor® (EPS) into foam blocks and molded parts in processing operations throughout the world is normally done in three processing stages: pre-expansion, intermediate storage, expansion.
During the pre-expansion process, the compact raw material is transformed into closed-cell foam. The size of the pearl-like granules changes in this process. The pre-expansion process as well as the further processing into foam blocks and molded parts are characterized by low energy consumption and short cycle times. The uniformly high and controlled quality of the raw materials ensures trouble-free manufacturing.
After an appropriate intermediate storage time, EPS and Neopor are expanded into conventional block and shape molds to make foams.