PE Electrofusion Belt And EF Band For HDPE Structured Wall Spiral Pipe Joint  INTRODUCTION PE electro fusion sleeve is composite with PE back board and electrical wire which is pressed into PE back boardby special lamination device. It is a kind of welding material of kinds of plastic pipes. Composition PE back boardElectrical wire Others   Application area: It is usually wider than that for metal reinforced corrugated pipe, is mainly used as joint of Hollow wall (structured wall) rewinding pipe.CONSTRUCTION CASE Hollow wall (structured wall) rewinding pipe We are also producing machine of heat shrinkable sleeve.