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

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/ Polyvinyl
chloride

E

G

G

F

G

G

E

G

BR

Polybutadiene

G

F

P

E

F

P

E

P

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/ Polyvinyl
chloride

E

G

G

G-E

G

G

G

BR

Polybutadiene

E

F-G

F-G

P

P

P

F-G