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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