Semi-conductive shielding compound
This product is produced according to index requirements for peroxide cross-linking semi-conductive shielding materials for EPR insulated cables of national standard JB/T 10738-2007: Semi-conductive shielding compound for power cables of rated voltages up to and including 35kV. It is suitable for maximum permissible continuous operating temperature of conductor of 90℃.

No.	Item	Unit	HBD		HBD-1
			Requirements	Measured value	Requirements	Measured value
1	Density	g/cm3	≤1.20	1.10	≤1.20	1.12
2	Tensile strength	MPa	≥6.0	7.0	≥6.0	7.0
	Elongation at break	%	≥180	240	≥200	320
3	Air oven aging test	135±2℃×168 h
	Tensile strength change rate	%	±30	8	±30	10
	Change rate of elongation at break	%	±30	-20	±30	-25
4	Impact embrittlement	℃	-40		-45
	Impact embrittlement performance	Failure rate	≤15/30	10/30	≤15/30	9/30
5	Thermal elongation	200±2℃×15 min×0.2MPa
	Elongation under load	%	≤80	15	≤80	15
	Permanent deformation after cooling	%	≤10	5	≤10	5
6	Volume resistivity at 20℃	Ω·cm	≤100	80	≤100	50
7	Volume resistivity at 90℃	Ω·cm	≤10000	5000	≤5000	3000
8	Volume resistivity after air aging	100±2℃×168 h
	Volume resistivity at 90℃	Ω·cm	≤1000	800	≤500	400