Welded polymeric articles and process

Details Welded polymeric articles and process Welded polymeric articles and process

B - Operations, Transporting

29

C

18/974

B29C 27/02 (1980.01)

Patent

CA 1052515

A B S T R A C T The invention relates to a method of joining abutting surfaces of polymeric material. The method comprises disposing between the surfaces an insert formed of thermoplastic material having dispersed therein a heat- activatable crosslinking agent, the insert having one or more perforations therethrough, and heating the surfaces and insert under compression, to cause the insert to flow and the crosslinking agent to be activated, whereby the surfaces are joined by crosslinked weld material and the escape of gases from the weld area is facilitated by the performations. The insert is preferably generally L-shaped in cross-section and, in a preferred embodiment, the perforations pass through the centre upright of the L-shaped insert.

228592

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