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Electrical insulating rubber

This product has good processability, good electrical insulativity, electrical erosion resistance, hydrophobicity and flame retardance. Its tracking resistance has reached the class 1A4.5. Molding and injection molding type can both meet the process requirements of customers. It is applicable to manufacturing of various composite insulators, surger arresters, insulators and high- & low-voltage electrical fittings for electrical lines of railways and urban light rails.

 

       Typical Properties:

 

Category

Item

Type 1 is applicable to molding

Type 2 is applicable to injection molding

MY DT1 DT1U

MY DT2 DT2U

MY DC1 DC1U

MY DC2 DC2U

MY DD1 DD1U

MY DD2 DD2U

MY DE1 DE1U

MY DE2 DE2U

Appearance

Gray white red

Vulcanization

Hardness Shore A

60±2

60±2

60±2

60±2

58±2

58±2

58±2

58±2

Tensile strength MPa

4.5

4.5

4.0

4.0

4.0

4.0

4.0

4.0

Elongation at break %

280

300

280

300

240

260

240

260

Breaking set%

2

2

2

2

2

2

2

2

Tear strength B KN/m

13

13

13

13

13

13

12

12

Specific density 25°C g/cm³

1.50±0.05

1.50±0.05

1.50±0.05

1.50±0.05

1.50±0.05

1.50±0.05

1.50±0.05

1.50±0.05

Compression set 180*22h %

40

40

40

40

35

35

40

40

Dielectric breakdown voltage Kv/mm

22

22

20

20

18

18

17

17

Volume resistivity Ω-Vcm

7x10¹⁴

7x10¹⁴

5x10¹⁴

5x10¹⁴

3x10¹⁴

3x10¹⁴

1x10¹⁴

1x10¹⁴

Flame retardance

FV-0

FV-0

FV-0

FV-0

FV-0

FV-0

FV-0

FV-0

Dielectric constant

3-4

3-4

3-4

3-4

3-4

3-4

3-4

3-4

Dielectric loss tg δ≤

3x10²

3x10²

6x10²

6x10²

7x10²

7x10²

7x10²

7x10²

Tracking resistance TMA(1A4.5grade: corrosion depth mm 2.5)

Pass

Pass

Pass

Pass

Pass

Pass

Pass

Pass

Physical data in the above table is for reference only.

Vulcanization condition: 175℃× 5Min.

 Addition of curing agent: liquid 2,5-Dimethyl-2,5-di(tert-butylperoxy)hexane, flame retardant rubber 0.4%

 

Advantage:

- Excellent physical properties

- Excellent electrical insulativity

- The flame retardance can reach the class FV-0 stated in the national standard IEC 60707.

 

Applications:

- Various composite insulators, Surge arrester

- High & Low voltage electrical fittings for electrical lines of railways and urban light rails.

 

Packing & Storage:

- 20kg/ carton lined with plastic bags or sheets.

- The products have a shelf life of 9 months from date of manufacture depending on the shore hardness if stored at room temperature in the originally sealed container. 



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