Sekisui Chemical Co., Ltd.

Toshifumi Sanni

Masashi Okabe

Koji Ichihara

Yusuke Hoshino

Nobuharu Terachi

Hideharu Kimura

Shintaro Umeyama

The present invention provides a fiber-reinforced composite pipe serving as a multi-layered pipe material having high strength and high dimensional stability and excellent in workability and provides a cold/warm water piping system excellent in dimensional stability and improved in workability. The fiber-reinforced composite pipe of the invention comprises a first layer of tubular form containing a polyolefin-based resin, a second layer of tubular form containing a polyolefin-based resin, a glass fiber and a compatibilizing agent, and a third layer of tubular form containing a polyolefin-based resin, in which the second layer is disposed on the outer side of the first layer and the third layer is disposed on the outer side of the second layer; the ratio of the thickness of the second layer relative to the total thickness of the first, second and third layers is 0.3 or more and 0.8 or less; and the content of the polyolefin-based resin is 45 wt % or more and 84 wt % or less, the content of the glass fiber is 15 wt % or more and 45 wt % or less and the content of the compatibilizing agent is 0.5 wt % or more and 10 wt % or less in 100 wt % of the second layer.

Fiber-reinforced composite pipe and cold/warm water piping system

It is an object to provide a fire-resistant piping material that can be fire-protection measures by itself and is excellent in construction workability. A single-layered fire-resistant piping material according to the present invention is constituted of a fire-resistant resin composition containing heat-expandable graphite in an amount of 1 to 10 parts by weight based on 100 parts by weight of a polyvinyl chloride-based resin. A multilayered fire-resistant piping material according to the present invention includes a tubular fire-resistant expandable layer made of a heat-expandable fire-resistant resin composition and a covering layer covering at least one of the outer surface and the inner surface of the fire-resistant expandable layer, and the fire-resistant expandable layer is formed of a fire-resistant resin composition containing heat-expandable graphite in an amount of 1 to 15 parts by weight based on 100 parts by weight of a polyvinyl chloride-based resin, and the covering layer is formed of a polyvinyl chloride-based resin composition not containing heat-expandable fire-resistant materials.

Fire-resistant piping material

Growing community of inventors

Kyoto, Japan

Toshifumi Sanni