Polyethylene is the main material of heat shrink tube products, is a kind of ethylene monomer polymer polymerization into a collection of linear molecular structure, ethylene monomer molecular formula is H2C - CH2, under the polymerization conditions, the double bond of each ethylene monomer molecule opens, several molecules polymerized into polymerized polyethylene is linear. Polyethylene is the most common plastic raw material. They do not have the properties of heat shrinkage. After a full mix with other fillers (color master, flame retardant, etc.) to make the master of the heat shrink tube, the master material is extruded into the original shrink tube semi-finished product. Then the polyethylene pipe at this time is irradiated cross-linking, the linear molecular structure is changed to the mesh molecular structure. After the treatment of polyethylene tube already has the shape memory function, put the tube in the oven is only soft will not become a melting state, its expansion to form our heat shrink tube finished product.
Heat shrink tube with shape memory performance, can be excellent wire and cable, fiber optic cable connectors, metal pipe protection. Can be used as aerospace, cutting-edge technology, military technology departments of special insulation materials, heat shrink tubes are increasingly popular in all walks of life. Heat shrinkmaterial shreds can not only be prepared into radial shrinkage of the shrink tube, but also can be made into a two-way contraction of the two-way plastic film, it can be used in packaging, protection of items and so on. Heat shrink material for its excellent performance, the future development prospects are gratifying.