Heat shrink materials are high polymer materials with a shape memory effect, such as polyolefin materials like EVA and EPDM. The material expands when exposed to radiation from a radiant source such as an electron accelerator, and will temporarily expand, and will stay in that shape as it is cooled. Once heat is applied once more, the heat shrink material will return to its original state.
As this is a main feature, heat shrink materials are used for a variety of pipes and materials, especially with its easy to use properties. Simply set the products directly onto the wire harness or joint that needs protection, and they will form a wrapping for the harnesses and joints through its own shrinking performance, which only requires heat.
Because of the numerous advantages of polyolefin material, such as its mechanical properties, UV aging resistance, acid/base/organic solvent resistance and lack of stress cracking, it has often been used to make heat shrink cable accessories for use in insulation and sealing within electric, metallurgy, petrochemical and other industries.