Dainichiseika Color & Chemicals Mfg. Co., Ltd.

Toshimichi Sano

Atsushi Nogami

Michiei Nakamura

Yoshio Abe

Toru Kawakami

Mitsuo Noda

Takaaki Ota

Yasutaka Momoi

Kotaro Oshima

A colored resin water distribution pipe formed of a colored resin composition which comprises a polyolefin resin as a main component and a blue fine powder pigment of a composite oxide which comprises two or more metal oxides and has a spinel crystal structure and a BET specific surface area of about 30 m /g or more. The blue fine powder pigment is covered with an inorganic compound. The blue fine powder pigment is preferably treated mechanochemically by grinding. The colored resin water distribution pipe exhibits excellent resistance to water containing chlorine as a bactericide so that discoloration of the coloring component and formation of blisters on the inner face of the pipe by water containing chlorine are prevented.

Colored resin water distribution pipe

Growing community of inventors

Narita, Japan

Toshimichi Sano