Mitsubishi Yuka Badische Company, Ltd.

Shigeo Nishikawa

Hiroshi Endo

Masakazu Arai

Shigeki Mathuno

Masahiro Tanaka

Masanori Saito

Kunikazu Nagasaki

A method of producing a polypropylene resin molded product from foamed polypropylene particles is disclosed, which comprises introducing a pressurizing gas into foamed polypropylene particles having closed cells so that the particles have an internal gas pressure of from 0.3 to 2.5 Kg/cm.sup.2 G, charging the particles in a mold cavity while compressing the particles with a pressurizing inorganic gas until the initial apparent volume of the particles is reduced to 50 to 99%, removing the gas from the mold cavity while keeping the foamed particles in a compressed state, and introducing steam in the cavity to cause adhesion of the compressed foamed particles. The method produces a molded product having satisfactory appearance and excellent adhesion among particles in a shortened molding cycle.

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Mie, Japan

Shigeo Nishikawa