Sumitomo Chemical Company, Limited

Sumika Color Company, Limited

Kenji Kodama

Hiroyuki Mori

Naohiko Mushiake

Sumio Hamada

Tuyoshi Itou

Jun Komai

A process for manufacturing multilayer pellets having a core-sheath structure with a molding material forming a sheath which covers the outer circumference of another molding material forming a core, which includes (a) supplying the core material and the sheath material to a die extruder having multiple extrusion-forming parts arranged along a circumference, (b) extruding multiple multilayer strands from the extrusion-forming parts by covering around the outer circumference of the core material concentrically with the sheath material, and (c) cutting the extruded multilayer strands to manufacture multilayer pellets.

Growing community of inventors

Itami, Japan

Kenji Kodama