Expansion-molded articles of an olefin synthetic resin and manufacturing method thereof
AssigneeKanegafuchi Kagaku Kogyo Kabushiki Kaisha
InventorsKiyoshi Matsuki, Yoshiaki Yawata
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Abstract
A large-sized in-mold expansion-molded article of an olefin synthetic resin having 150 mm or more in thickness, 50% or more in fusion ratio and 10% or less in density distribution is disclosed. The expansion-molded article is obtainable by adoption of a process in which pre-expanded beads are charged into a mold, preheated and steamed before molding. Large-sized expansion-molded article of an olefin synthetic resin 500 mm or even more in thickness is obtainable by the present invention.
Claims6
An in-mold expansion-molded article having three sides and made from an olefin synthetic resin, wherein the shortest of the three sides has a thickness of at least 150 mm;
- said article having a fusion ratio of at least 50% and a density distribution of not more than 10% over the average density of the article.
Dependencies are inferred from the claim text.