FOAM-MOLDED ITEM OF OLEFINIC SYNTHETIC RESIN AND METHOD OF MANUFACTURING THE SAME

摘要

A large-sized foam-molded item of an olefinic synthetic resin, characterized in that the said item is formed in a mold, has a thickness of 150 mm or thereabove, a fusion rate of 50 % or thereabove and a density distribution of 10 % or therebelow. The foam-molded item according to the present invention can be obtained in such a manner that prefoamed particles are filled in a mold, and thereafter, a specific preheating process and a process of settling the particles by their heat are introduced. According to the present invention, the large-sized foam-molded item of olefin resin having a thickness of 500 mm or thereabove can be obtained.