Gas welding of plastics was extensively practised in Germany during World War II, when the Germans also introduced it to selected firms in Austria, Belgium, France, Denmark, Holland, Italy and Norway.
Early work in the welding of plastics mainly concentrated on unplasticized PVC. Today, welding is an important fabrication technique with the overwhelming emphasis on rigid PVC and, to a lesser extent, on polythene. Without welding techniques many products indelibly associated with plastics materials could never be fabricated.
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