Halogen-free flame-retardant thin thermal casing of environmental protection 
 Is environmentally friendly flame retardant halogen-free ultra-thin heat-shrinkable tube with excellent flame-retardant, insulation performance, very soft and flexible, low shrink temperature, shrink fast, widely used in cable connections, cable ends processing, solder joint protection , wiring harness identification, resistance and capacitance of the insulation, metal rod or pipe anti-corrosion protection of the antenna. ? Shrink the role of theory in high-energy rays, the linear polymer to form three-dimensional crosslinked network. Crosslinked polymers in mechanical strength, heat resistance, chemical solvents, anti-aging and so on a greatly improved, especially in acid and alkali can be greatly improved. ? Temperature range -55 ℃ ~ 125 ℃;? Initial shrinkage temperature of 75 ℃, fully shrink temperature 120 ℃;? Radial shrinkage ratio of 2:1, the longitudinal shrinkage of ≤ 8%;? Use an oven and the hot air gun heating to shrink;? Color black, red, yellow, green, blue, white, and produce other colors according to customer requirements. ? Implementation of standards UL224 VW-1 C-UL CSA C 22.2 OFT? Physical and chemical properties 
 Performance of typical performance test methods 
 Physical properties Tensile strength (MPa) GB/T1040 ≥ 10.4 14.8 
 Elongation (%) GB/T1040 ≥ 200 460 
 Tensile strength after thermal aging (MPa) UL 224 158 ℃ × 168hr ≥ 7.3 14.5 
 Elongation after heat aging (%) UL 224 158 ℃ × 168hr ≥ 100 480 
 Heat shock UL 224 250 ℃ × 4hr not sticky without cracking PASS 
 Electrical characteristics of resistance to cold bending UL 224 -30 ℃ × 4hr not crack PASS 
 Breakdown Strength (Kv / mm) GB/1408 ≥ 15 17 
 Voltage 600V UL 224 2500V No breakdown PASS 
 Volume resistivity (Ω.m) GB/1410 ≥ 1 × 1016 1 × 1017 
 Chemical characteristics of corrosion resistance UL 224 158 ℃ × 168hr PASS 
 Copper stability UL 224 158 ℃ × 168hr PASS 
 UL Flammability