Our company operates multiple extrusion production lines, with extrusion diameters currently reaching 1600mm. Our daily production capacity is 20 tons.

During the extrusion process, the outer casing is subjected to corona polarization treatment and fixed-length shaping. The polarization treatment equipment is a fully integrated unit developed by our factory based on new technology domestically. The principle involves applying overvoltage to polarize the non-polar polyethylene molecules, creating a layer of polar molecules on the inner wall of the polyethylene, thereby enhancing the adhesion between polyethylene and polyurethane foam. This ensures that the bonding strength of the high-density polyethylene outer sheath to the polyurethane foam meets the standard's specified values.

The processing and manufacturing of high-density polyethylene outer sheath involves the use of internal pressure and external diameter shaping technology, along with qualified polyethylene granules. These granules are processed through an automatic feeding and drying unit, followed by plasticization extrusion, pressure sizing, spray cooling, axial pulling, airtight sealing device, corona polarization, and pipe cutting, resulting in continuous production.