| 摘要 |
Method of welding together plastics materials, such as, two or more panels (1, 2) of flexible plastics sheet and/or plastics foam material, comprising locating a resistive heating element (5) in the region (3, 4) of a welded joint to be formed therebetween, resistively heating the element (5) such that the temperature of the plastics materials in the region thereof is raised to at least the respective melting points of the plastics materials, and subsequent cooling the materials or allowing the materials to cool to below their melting points, whereby the plastics material in the region of the heating element (5) is welded together to form a joint. The invention also embraces a resistive heating element (5) and a jointing strip (11, 21) which may be used in the welding methods, as well as a method of manufacturing the jointing strips (11, 21) and electrical power supply apparatus for use therewith. |
