Double-wall composite thermal casing 
 Series of double-wall heat shrink tubing from the outside compound semiconductor layer and the insulating layers, the formation of the product through the co-extrusion, a good combination between the two layers, seamless, for a total of contraction between the two levels before and after breathing. Major above for 10KV and 36KV cable length standard packaging .* 1000mmm. performance parameters 
 Method Property Test Typical Value 
 Outside the semi-conductive layer 
 1 Density ASTM D792 1.0 
 2 Tensile Strength ASTM D412 12 N/mm2 
 3 Elongation ASTM D412 300% 
 4 Water absorption ASTM D570 <0.5% within the insulating layer 
 1 Density ASTM D792 1.0 
 2 Tensile Strength ASTM D412 15 N/mm2 
 3 Elongation ASTM D412 350% 
 4 Water absorption ASTM D570 <0.5% 
 5 Volume resistivity ASTM D257 1 x 1014? - Cm 
 Finished product 
 1 Heat shock @ 200 ° C ASTM D2671 Passes 
 2 Low temperature flexibility @ -20 ° C ASTM D2671 Passes 
 3 Longitudinal changes in ASTM D2671 Inside 10% 
 4 Wall thickness ratio ASTM D2671> 0.6