CHL-black——continuous vulcanized sheath rubber compound for marine cable
CHG-black——tank curing sheath rubber compound for marine cable
According to different requirements to index, each kind of product is classified into three grades, for example: CMH-L black-1  CHL balck-1    CHL black-2   CHL black-3
This series of rubber compound is produced according to GB/T17556-1998 standard, namely 85ºC common incombustible sheath rubber compound. Long-time work temperature of applicable conductor should be 85°C. It can be used with 90°C insulating rubber together. It’s property of cold resistance is in accordance with the requirement of GB9331-88 marine cable. Property of flame reaches class A and Class B test requirement of GB1266.5-90C bunched burning.

No.	test items					unit	requirement	result
before aging	tensile strength  ≥					Mpa	10.0	12.6
	elongation at break≥					%	300	457
test of heat aging	aging condition	temperature				℃	100±2	100±2
		time				H	7*24	7*24
	tensile strength after aging≤					%	±30	-6
	elongation at break after aging				Mid value≥	%	250	425
					Rate of change	%	±40	-7
Test of heat elongation	test condition		temperature of air			℃	200±3	200±3
	test condition		loading time			Min	15	15
			mechanical stress			Mpa	20	20
	Elongation rate under load  ≤					%	175	15
	permanent deformation after cooling≤					%	15	8.6
Test of oil dipping	test condition			oil temperature		℃	100±2	100±2
				oil immersion time		H	24	24
	rate of change of tensile strength  ≤					%	±40	-5
	rate of change of elongation rate at break≤					%	±40	2