FIRE-RESISTANT PIPING MATERIAL

摘要

Fire-resistant piping materials which themselves can be fireproof and have excellent applicability. One of the materials is a single-layered fire-resistant piping material characterized by being made of a fire-resistant resin composition comprising 100 parts by weight of a polyvinyl chloride resin and 1-10 parts by weight of heat-expandable graphite. Another is a multilayered fire-resistant piping material characterized in that it comprises a tubular fire-resistant expandable layer comprising a heat-expandable fire-resistant resin composition and a coating layer with which at least either of the outer side and inner side of the fire-resistant expandable layer is covered, that the fire-resistant expandable layer is made of a fire-resistant resin composition comprising 100 parts by weight of a polyvinyl chloride resin and 1-15 parts by weight of heat-expandable graphite, and that the coating layer is made of a polyvinyl chloride resin composition containing no heat-expandable fire-resistant material.