Suzhou Volsun Electronics Technology Co., Ltd.
Views: 0 Author: Site Editor Publish Time: 2026-04-16 Origin: Site
When specifying insulation for medium and high-voltage electrical assets, the molecular structure of the material determines its ultimate failure point. Standard thermoplastic materials often soften or undergo "creep" when subjected to the high temperatures generated by peak electrical loads. At Volsun, we address this through the science of radiation crosslinking, creating the MPRS series of busbar heat shrink tubing that offers unparalleled lifecycle reliability.
The Physics of Radiation Crosslinking The MPRS series heat shrink sleeve is manufactured using high-energy electron beam irradiation. This process causes the polymer chains within the polyolefin to form strong covalent bonds with one another, transforming the material from a simple thermoplastic into a robust, three-dimensional network. This "molecular memory" is what allows the tube to shrink precisely when heated—with a 2:1 shrink ratio—and stay firmly in place without ever returning to its original size or losing its grip.
The true test of an insulation material is its performance after years of heat exposure. Volsun’s technical indices demonstrate world-class aging resistance:
High Thermal Shock Resistance: The material is tested to withstand thermal shocks—up to 250C for 4 hours for the 1kV series—without showing signs of cracking or flaws.
Thermal Aging Performance: Even after 168 hours of continuous exposure to 130C, our 10kV tubing maintains a tensile strength of more than 6.9MPa and an elongation at break of 100%.
Environmental Integrity: All products are compliant with RoHS environmental protection standards, ensuring that they are free from hazardous substances like lead or cadmium.
Whether it is the 1kV series for low-voltage busbar slots or the 35kV series for high-voltage bus bars, the MPRS line provides a consistent shield against the elements. With a Shore A hardness of less than 90, the material is tough enough to resist mechanical abrasion while remaining soft enough to conform to complex busbar geometries. By investing in the material science of radiation crosslinking, utility operators and OEMs can significantly reduce the risk of insulation degradation, ensuring a safer and more stable power distribution network for decades.
