| 摘要 |
995,284. Heat insulating tubes. DUNLOP RUBBER CO. Ltd. June 19, 1962 [June 22, 1961], No. 23451/62. Heading F2P. A tube for thermally insulating pipes is made by wrapping layers of glass wool, glass cloth, quartz fabric or asbetos fabric on to a cylinder, than coating the layers with a polyurethane composition which is heated to cause it to foam and set. |
