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Natural/SBR rubbe

Advantages:

Natural rubber has high elasticity at room temperature, is slightly plastic, has very good mechanical strength, low hysteresis loss, low heat generation during multiple deformations, so its flex resistance is also very good, and because it is non-polar Rubber, so the electrical insulation performance is good.
SBR has the advantages of wear resistance, cold resistance, low heat generation, low shrinkage, good color, less ash, high purity and fast vulcanization speed, and has the advantages of low rolling resistance, excellent wet-slip resistance and wear resistance. , With a wide range of applications.In addition, styrene butadiene rubber has the advantages of good touch, good weather resistance, good resilience and small permanent deformation.

Name

Natural styrene-butadiene sheath compound

No.

Test item

unit

Standard value

result

 judgment

1

Physical Properties

 

1.1

Density

g/cm3

≤1.5

1.48

qualified

2

Rheological Properties

 

2.1

Mooney-viscosity(100℃ 1+4)

MU

 

67

qualified

3

Machanical properties

 

3.1

Tensile strength

N/mm2

≥8

10.1

qualified

3.2

Elongation at break

%

≥300

510

qualified

3.3

Hardness(shore A)

 

 

70

qualified

4

After ageing in air oven 70℃-240h

 

4.1

Yariation of tensile strength

%

±20

12.60%

qualified

4.2

Elongation at break

 

≥300

440

qualified

4.3

Yariation of Elongation at break

%

±20

-13.7

qualified

5

Hot set test 200℃-15min-0.2N/mm2

 

5.1

Elongation under load

%

≤175

18

qualified

5.2

Elongation after unloading

%

≤25

4

qualified

 

 

 

Name

Natural styrene butadiene insulating adhesive

No.

Test item

unit

Standard value

result

 judgment

1

Physical Properties

 

 

 

 

1.1

Density

g/cm3

≤1.55

1.49

qualified

2

Rheological properties

 

 

 

 

2.1

Mooney-Viscosity(100℃ 1+4)

MU

 

65

qualified

3

Mechanical properties

 

 

 

 

3.1

Tensile strength,MPa

N/mm2

≥5

7.9

qualified

3.2

Elongation at break,%

%

≥250

640

qualified

3.3

Hardness(ShoreA)

 

 

63

qualified

4

After ageing in air oven 100℃*168h

 

4.1

Tensile strength

N/mm2

≥6.3

8.5

qualified

4.2

Variation of tensile strength

%

±25

7.60%

qualified

4.3

Elongation at break

%

≥250

545

qualified

4.4

Variation of Elongation at break

%

±25

-14.80%

qualified

5

Hot set test 200℃-15min-0.2N/mm2

 

5.1

Elongation under load

%

≤100

12

qualified

5.2

Elongation after unloading

%

≤25

4

qualified

6

After ageing in compressed air chamber 127℃-40h-5.5bar

 

6.1

Variation of tensile strength

%

±30

21.10%

qualified

6.2

Variation of Elongation at break

%

±30

-16.60%

qualified

7

Ozone resistance

 

7.1

25℃-24h-250-300PPM

 

7.2

Results to be obtained

 

No cracks

No cracks

qualified

Directory for usage

1、Extrusion: CPE has good heat-resistant and processing capability and wide extrusion temperature range, which enhance the safety for processing. For its hardness and viscosity are higher than neoprene, its extrusion temperature is correspondingly higher by 5-10 degrees.

                       Temperature range for stuffing port: 40-50℃

                       Temperature range for machine body:55-70℃

                       Temperature range for machine head: 65-80℃

2、In practical production, according to the difference of extruding machine and cable diameter, the processing parameter shall be adjusted. We will provide relevant technical data to our consumers after they buy our products and send experienced technicians to give on-site guidance.

3、Storage: it can be stored for more than six mouths. And it can still be used even though hardened after long time storage. It should be better for recycling if the conditions allows. Keep away from direct sunlight and raining.

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