Plastic welding
Welding of semi-finished plastic materials / From Wikipedia, the free encyclopedia
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Plastic welding is welding for semi-finished plastic materials, and is described in ISO 472[1] as a process of uniting softened surfaces of materials, generally with the aid of heat (except for solvent welding). Welding of thermoplastics is accomplished in three sequential stages, namely surface preparation, application of heat and pressure, and cooling. Numerous welding methods have been developed for the joining of semi-finished plastic materials. Based on the mechanism of heat generation at the welding interface, welding methods for thermoplastics can be classified as external and internal heating methods,[2] as shown in Fig 1.
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Production of a good quality weld does not only depend on the welding methods, but also weldability of base materials. Therefore, the evaluation of weldability is of higher importance than the welding operation (see rheological weldability) for plastics.