... and TPO materials, such as roofing material, container tents, PVC tarpaulin, PVC water bed, swimming pool, plastic membrane material, inflatables jointing ... , limitless welding length. Operation Procedure:1. Stretch the tarpaulin and make it smooth, butt joint the 2 parts ... power, set welding temperature and welding speed (according to tarpaulin thickness and operator’s proficiency), warm-up the machine ...