2results about How to "Good extrusion processing performance" patented technology

This invention relates to the field of polymer materials technology, and discloses a high-elasticity rubber-plastic insulated cable composite material and its preparation method. The high-elasticity rubber-plastic insulation material comprises, by weight, 40-50 parts of EPDM rubber, 20-25 parts of polyolefin elastomer, 30-35 parts of modified calcined kaolin, 3-5 parts of composite antioxidant, 2-3 parts of silane coupling agent, and 1.5-2 parts of vulcanizing agent. During preparation, EPDM rubber and polyolefin elastomer are kneaded for 5-8 minutes, then modified calcined kaolin and silane coupling agent are added and kneaded for another 8-12 minutes, followed by the addition of composite antioxidant and vulcanizing agent and kneading for 3-5 minutes. Finally, the mixture is vulcanized in stages. The first stage vulcanization temperature is 155-160℃, and the second stage vulcanization temperature is 165-170℃. The insulating material prepared by this invention has excellent elasticity, outstanding resistance to flexural fatigue, stable insulation performance, high volume resistivity, excellent aging resistance, and tight interfacial bonding. It is suitable for use in high-voltage cable insulation layers, effectively extending the service life and stability of the cable.

The present application relates to the technical field of cable material, in particular to a kind of high tear-resistant cable material and preparation method.The material takes hydrogenated styrene-butadiene-styrene block copolymer as matrix, contains carboxyl-terminated liquid fluororubber microcapsule and polypyrrole modified layered double hydroxide nanosheet.Through the process of containing dynamic vulcanization, the microcapsule core material is released and interfacial interaction occurs with nanosheet, and dynamic sacrificial network and rigid nanoskeleton interpenetrating structure are constructed in situ in matrix.The material has both ultra-high tear strength (≥78kN / m) and high elongation at break (≥400%), and realizes early mechanical damage electrical warning function using sensitive conductive network formed by polypyrrole on the surface of nanosheet.Meanwhile, the material maintains excellent flame retardancy, insulation, heat resistance and processing performance, and is suitable for cable sheath with high requirements for reliability and intelligentization.