| 摘要 |
<p>PROBLEM TO BE SOLVED: To fully exert a sufficient thermal insulating property even with thin insulating layer by forming the insulating layer having one or more than two types of mixtures selected from a group consisting of superfine grains of silica, titanium oxide, aluminum oxide and iron oxide as a main component. SOLUTION: In this insulated piping material useful as an insulated pipe, an insulating layer having one or more than two types of mixtures consisting of superfine grains of silica, titanium oxide, aluminum oxide and iron oxide is formed. For example, in the case where it is applied to a piping consisting of two resin hot and cold water feeding pipes 1 surrounded with insulating material, the insulating material composed of polyethylene foam 2 kneaded with superfine grain powder 3 is used. In manufacturing, polyethylene pellets is knead with the superfine grain powder to form pellets of polyethylene/ superfine grains, to manufacture a sheet consisting of the polyethylene/superfine grain powder foam, and then the insulated piping material is constituted with this sheet.</p> |
