| Visico ME4425/LE4437 is a natural, moisture-induced crosslinking polyethylene compound that is designed for use as low voltage wire insulation and jacketing. ME4425 is a medium-density ethylene vinylsilane copolymer that offers improved deformation resistance, toughness, and durability over conventional low-density ethylene vinylsilane copolymers. The combination of a Visico base material, ME4425, and a tin catalyst masterbatch, LE4437, provides a highly scorch retardant compound with excellent thermal stability. ME4425/LE4437 contains a patented scorch retardant additive (SRA) that increases the processing window for a moisture crosslinking compound and minimizes the tendency for premature crosslinking in the extruder ,head or die. LE4437 should be added to ME4425 directly in the extruder hopper by dry blending at a ratio of 5 parts LE4437 to 95 parts ME4425. LE4437 also provides, in addition to catalyst, a stabilization package containing suitable antioxidants, a metal passivator and a metal deactivator. Properly mixed, during the extrusion process, ME4425/LE4437 exhibits excellent thermal stability to oxidation. LE4424/LE4437 is recommended for use as insulation for low voltage control cables and power cables up to 6 kV in rating. Information provided by the Manufacturer. |
