Insulation & Sheath Material Properties In General

Characteristics of Elastomeric Insulating and Sheath Materials

Designation			Electrical
VDE initial- code	Abbre-viations	Materials	Density	Break down voltage	Specific volume resistivity	Dielectric-constant	Dielectric loss factor tan δ
			g/cm3	KV/mm (20°C)	Ohm·cm 20°C	50 Hz/20°C
G	NR SBR	Natural rubber Styrene-butadiene rubber	1,5-1,7	20	1012–1015	3-5	1,9 x 10–2
2G	SiR	Silicon rubber	1,2-1,3	20	1015	3-4	6x 10–3
3G	EPR	Ethylene Propylene Rubber compounds	1,3-1,55	20	1014	3-3,8	3,4 x 10–3
4G	EVA	Ethylene vinyl acetate compounds	1,3-1,5	30	1012	5-6,5	2 x 10–2
5G	CR	Polychloroprene compounds	1,4-1,65	20	1010	6-8,5	5 x 10–2
6G	CSM	Chlorosulphonated polyethylene compounds	1,3-1,6	25	1012	6-9	2,8 x 10–2
	EPDM	Ethylene-propylene-diene elastomer	0,86-2,0	35	1012	2,2-3,0	0,5 x 10–3-1x 10–2
	NBR	Nitrile butadiene rubber	1,0-1,49	20	1014-1015	6-8,5	5 x 10–2-5,5 x 10–2
	NBR/PVC	Nitrile butadiene rubber/ Polyvinylchloride	0,144-0,24	20	1010	6-8,5	5 x 10–2
	BR	Polybutadiene	0,9-1,0	20	1010	3-4	5 x 10–2

Designation			Thermic
VDE initial- code	Abbre-viations	Materials	Working temp.		Melt-temp	Oxygen index LOI	Heating value H0	Thermal-conductivity	Corrosive gases in case of fire	Radiation resistance
			Permanent (°C)	Short time(°C)	+°C	(% O2)	MJ·kg-1	W·K-1·m-1		Mrad
G	NR SBR	Natural rubber Styrene-butadiene rubber	– 65+ 60	+120	—	%22	21–25	—	No	100
2G	SiR	Silicon rubber	– 60+180	+260	—	25–35	17–19	0,22		50
3G	EPR	Ethylene Propylene Rubber compounds	– 30+ 90	+160	—	%22	21–25	—		200
4G	EVA	Ethylene vinyl acetate compounds	– 30+125	+200	—		19–23	—		100
5G	CR	Polychloro-prene compounds	– 40+100	+140	—	30–35	14–19	—	Hydrogen chloride	50
6G	CSM	Chlorosul-phonated polyethylene compounds	– 30+ 80	+140	+160		19–23	—
	EPDM	Ethylene-propylene-diene elastomer	– 30+110	+120	+160	30–35	14–19	0,26	No	50
	NBR	Nitrile butadiene rubber	– 40+110	+140	+160	30–35	14–19	0,25	No	50
	NBR/PVC	Nitrile butadiene rubber/ Polyvinylchloride	– 40+105	+140	+160	28	14–19	0,25	Hydrogen chloride	50
	BR	Polybutadiene	–70+70	+140	+160	30–35	14–19	0,25	No	50

Designation			Mechanical				Halogen
VDE initial-code	Abbre-viations	Materials	Tensile strength	Elongation at break	Shore hardness	Water absorbtion	Halogen-free
			N/mm2	%		%
G	NR SBR	Natural rubber Styrene-butadiene rubber	5–10	300–600	60–70 (A)	1,0	No
2G	SiR	Silicon rubber			40–80 (A)		Yes
3G	EPR	Ethylene Propylene Rubber compounds		200–400	65–85 (A)
4G	EVA	Ethylene vinyl acetate compounds	8–12	250–350	70–80 (A)		No
5G	CR	Polychloroprene compounds	10–20	400–700	55–70 (A)		No
6G	CSM	Chlorosulphonated polyethylene compounds		350–600	60–70 (A)	1,5
	EPDM	Ethylene-propylene-diene elastomer	10-25	250-500	40–90 (A)	0.2	Yes
	NBR	Nitrile butadiene rubber	10-25	350-650	40–90 (A)	1	Yes
	NBR/PVC	Nitrile butadiene rubber/ Polyvinylchloride	10-20	400-700	80-90 (A)	1	No
	BR	Polybutadiene	10-15	200-400	48–80 (A)	1	Yes

P = Poor; F= Fair; G = Good; E = Excellent; O = Outstanding

Designation			Properties
VDE initial- code	Abbre-viations	Materials	Oxidation resistance	Heat resistance	Oil resistance	Low-tempe-rature flexibility	Weather, sun resistance	Ozone resistance	Abrasion resistance	Flame resistance
G	NR SBR	Natural rubbe	F	F	P	G	F	P	E	P
		Styrene-butadiene rubber	G	F	P	E	F	P	E	P
2G	SiR	Silicon rubber	E	G	F-G	O	O	O	F	F-G
3G	EPR	Ethylene Propylene Rubber compounds	G	E	F	G-E	E	E	G	P
4G	EVA	Ethylene vinyl acetate compounds	G	G	G	F-G	G-E	G	G-E	P
5G	CR	Polychloro-prene compounds	G	G	G	F-G	G	G	G-E	G
6G	CSM	Chlorosul-phonated polyethylene compounds	E	E	G	F	E	E	G	G
	EPDM	Ethylene-propylene-diene elastomer	E	E	P	G-E	E	E	G	P
	NBR	Nitrile butadiene rubber	F	G	G-E	F	F-G	P	G-E	P
	NBR/PVC	Nitrile butadiene rubber/ Polyvinylchloride	E	G	G	F	G	G	E	G
	BR	Polybutadiene	G	F	P	E	F	P	E	P

P = Poor; F= Fair; G = Good; E = Excellent; O = Outstanding

Designation			Properties
VDE initial- code	Abbre-viations	Materials	Water resistance	Acid resistance	Alkali resistance	Aliphatic hydrocarbons resistance (Gasoline, kerosene, etc)	Aromatic hydrocarbons resistance (Benzol, toluol, etc.)	Halogenated hydrocarbons resistance (Degreaser solvents)	Alcohol resistance
G	NR SBR	Natural rubber	G-E	F-G	F-G	P	P	P	G
		Styrene-butadiene rubber	E	F-G	F-G	P	P	P	G
2G	SiR	Silicon rubber	G-E	F-G	F-G	P-F	P	P-G	G
3G	EPR	Ethylene Propylene Rubber compounds	G-E	G-E	G-E	P	F	P	P
4G	EVA	Ethylene vinyl acetate compounds	G	G	G	G	P-F	P	F
5G	CR	Polychloro-prene compounds	G	G	G	G	P-F	P	F
6G	CSM	Chlorosul-phonated polyethylene compounds	G-E	E	E	F	F	P-F	G
	EPDM	Ethylene-propylene-diene elastomer	G-E	G-E	G-E	P	F	P	P
	NBR	Nitrile butadiene rubber	G-E	G	F-G	E	G	P	E
	NBR/PV	Nitrile butadiene rubber/ Polyvinylchloride	E	G	G	G-E	G	G	G
	BR	Polybutadiene	E	F-G	F-G	P	P	P	F-G

P = Poor; F= Fair; G = Good; E = Excellent; O = Outstanding