Polyethylene wrap with anticorrosive tubing
Heat shrinkable winding belt also calls the anticorrosion adhesive tape, PE heat shrinkable winding belt, thermal shrinkage, hot wind, etc., it is a new kind of good performance is simple steel pipe weld corrosion materials, is composed of base material and hot melt glue line double material. The base material is a plastic casing (sheet material) formed by extruding, radiating crosslinking and stretching. Hot melt adhesive is a special adhesive. Solid at room temperature, heating the molten can flow, can be coated on the substrate, is good for both metal and plastic stick relay, base material has high mechanical strength, and long service life, corrosion resistance, ageing resistance, resistance to environmental stress cracking, mixing hot melt adhesive has the characteristics of strong cohesive force, good sealing.
Shrink wrapped with product structure in three layers (3 PE) : the inner layer is coated on the surface of the steel tube, a two-component solventless epoxy primer, an intermediary for the performance of anticorrosive hot melt adhesive, outer base material for the irradiation modification of low density polyethylene。 The epoxy resin primer is not used when two layers of structure are used to shrink the belt (2PE for short)。 In a few cases, the external corrosion protection layer of the steel tube is also the second layer (the second layer PE corrosion), and the contact with the steel tube is sealed with hot melt adhesive and the outer layer is crosslinked polyethylene。 Jacket antisepsis is made up of foam jacket (inner layer) hot melt adhesive (middle layer) and base material (outer layer)。 Shrink wrapped belt is for the working temperature is less than 70 degrees of buried steel pipeline corrosion and design of the heat shrinkable type belt, bring heat shrinkable winding coil on the pipe, can be used for pipe body massive damage patching anticorrosive, through sacrifice patching protection, special joint anti-corrosion protection, can also be used for steel pipe bending parts winding heat shrinkable layer coating anticorrosion and pipe damage repair, can also be used for the whole pipe winding embalmed; It adopts hot-melt adhesive and ordinary base material multi-layer composite structure, the material properties are good, the installation is convenient, the operation is simple; Impact resistance, anti seepage, the temperature cycling, water purification, static pressure has very good resistance, as well as the ultraviolet, bacteria, mold, pipeline cathodic protection current caused by the separation of coating has a strong resistance。