Kaneka Corporation

Kanegafuchi Kagaku Kogyo Kabushiki Kaisha

Osamu Miyama

Haruo Tomita

Tetsuo Okura

Taizo Aoyama

Mitsuharu Kourogi

Hesun Kim

Yoshifumi Fukui

There is provided a foamed article having a low density, large thickness, a high closed cell ratio and a small average cell diameter. A foamed extrusion article having a density of 50 to 10 kg/m,and a closed cell ratio of at least 40% is obtained by mixing a mixed resin comprising (a) 50 to 95 parts by weight of a polypropylene resin having a melt tension at 230&deg; C. of at least 0.05 N, (b) 50 to 5 parts by weight of a polystyrene resin, and (c) 0.5 to 15.0 parts by weight of a hydrogenated block copolymer of styrene, isoprene and styrene based on 100 parts by weight of the polypropylene resin (a) and the polystyrene resin (b) with a foaming agent in an extruder, and then releasing into a low-pressure zone.

Extrusion-foamed board of resin blend comprising modified polypropylene resin and polystyrene resin

Foam made from modified polypropylene resin and process for the

Modified polypropylene resin, foam made thereof and processes for the

Growing community of inventors

Settsu, Japan

Osamu Miyama