| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a fire-proof sound insulation pipe having a fire-proof property usable in a fraction-penetrating part and excellent fire-proof sound insulation properties. <P>SOLUTION: A fire-proofing sound insulation pipe includes an inner tube 1 made of a fire-proof resin composition comprising 100 pts.wt. of a polyvinyl chloride type resin and 1 to 10 pts.wt. of thermal expansion black lead and a sound insulation outer tube 2b in the inner tube 1, made of a resin composition comprising 100 pts.wt. of an olefin type resin and 300 to 600 pts.wt. of an inorganic filler, wherein the sound insulation outer tube 2b has a tubular outer tube body 21 and a plural of ribs 22 for forming the space S between the outer tube body 21 and the inner tube 2 projecting from the inner wall surface of the outer tube body 21 and being held to the outer wall surface of the inner tube 1. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
