Descripton
HT40-70RP.These Grades of rubber have been specially developed for use at elevated temperatures up to 315 °C . They give good resistance and elasticity within a large temperature range and more particularly at very high temperatures.
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Characteristics after vulcanisation and postcure (16 h at 250°Ceat Resistance |
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Thermal ageing at 200 °C |
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Thermal ageing at 250 °C |
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Thermal ageing at 300 °C |
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Resistance to oil and Boiling Water |
Characteristics after vulcanisation and postcure (16 h at 250°C)
| · Shore A hardness(points) approx. | 40 |
50 |
60 |
70 |
| · Break Strength (kg/cm2) or (Mpa x 10)approx. | 60 |
75 |
85 |
80 |
| · Elongation at break, % approx. | 420 |
400 |
350 |
300 |
| · Tear strength, KN/m, approx. | 10 |
18 |
20 |
18 |
| · Elasticity modulus at 100% elongation, Mpa, approx. | 6 |
11 |
15 |
18 |
| · CS (70 h/150°C/25% (%) approx. | 24 |
27 |
28 |
33 |
| · Resilience (Zwick) % approx. | 44 |
40 |
36 |
35 |
| · Brittle Point, °C approx. | -80 |
-80 |
-80 |
-80 |
| · Linear Shrinkage (%) approx. | 3.3 |
3.3 |
3.3 |
3.3 |
| · Dielectric strength under 2mm (kV/mm) approx. | 16 |
16 |
16 |
16 |
| · Volume Resistivity (W .cm) | 10-16 |
10-16 |
10-16 |
10-16 |
| · Dielectric Constant at (1 MHz), approx. | 2.8 |
2.8 |
2.8 |
2.8 |
| · Power Factor (1MHz), approx. | 2.10-3 |
2.10-3 |
2.10-3 |
2.10-3 |
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Figures given above are for guidance only, and should not be used for specifications.
E. & O.E
| After
ageing 500 h Shore A Hardness (points) Break strength (kg/cm 2) Elongation (%) |
45 53 315 |
58 73 305 |
63 81 285 |
73 81 235 |
| After
ageing 1000 h Shore A Hardness (points) Break strength (kg/cm 2) Elongation (%) |
46 40 270 |
60 59 270 |
64 67 265 |
75 70 210 |
| After
ageing 2000 h Shore A Hardness (points) Break strength (kg/cm 2) Elongation (%) |
47 28 220 |
62 40 190 |
67 43 185 |
78 47 125 |
| After
ageing 4000 h Shore A Hardness (points) Break strength (kg/cm 2) Elongation (%) |
51 27 190 |
65 43 170 |
70 39 125 |
80 39 75 |
| After
ageing 7000 h Shore A Hardness (points) Break strength (kg/cm 2) Elongation (%) |
54 25 155 |
68 36 135 |
72 38 115 |
- - - |
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| Properties | HT40RP |
HT50RP |
HT60RP |
HT70RP |
| After ageing 16 h
Shore A Hardness (points) Break strength (kg/cm 2) Elongation (%) |
40 60 420 |
50 75 400 |
60 85 350 |
73 81 300 |
| After ageing 500 h
Shore A Hardness (points) Break strength (kg/cm 2) Elongation (%) |
47 43 265 |
63 60 225 |
70 62 200 |
80 57 120 |
| After ageing 1000
h Shore A Hardness (points) Break strength (kg/cm 2) Elongation (%) |
54 41 230 |
70 56 190 |
75 56 160 |
86 48 75 |
| After ageing 2000
h Shore A Hardness (points) Break strength (kg/cm 2) Elongation (%) |
57 42 190 |
73 50 125 |
80 42 90 |
88 45 50 |
| After ageing 3000
h Shore A Hardness (points) Break strength (kg/cm 2) Elongation (%) |
57 42 190 |
73 50 125 |
80 42 90 |
88 45 50 |
| After ageing 4000
h Shore A Hardness (points) Break strength (kg/cm 2) Elongation (%) |
71 46 145 |
87 50 70 |
- - - |
- - - |
| After ageing 6000
h Shore A Hardness (points) Break strength (kg/cm 2) Elongation (%) |
76 51 110 |
- - - |
- - - |
- - - |
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| Properties | HT40RP |
HT50RP |
HT60RP |
HT70RP |
| After ageing 200 h
Shore A Hardness (points) Break strength (kg/cm 2) Elongation (%) |
50 45 250 |
65 60 225 |
80 55 140 |
85 60 100 |
| After ageing 400 h
Shore A Hardness (points) Break strength (kg/cm 2) Elongation (%) |
60 45 190 |
75 55 150 |
- - <100 |
- - <100 |
| After ageing 600 h
Shore A Hardness (points) Break strength (kg/cm 2) Elongation (%) |
75 45 140 |
- - <100 |
- - - |
- - - |
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Resistance to oil and Boiling Water
CHANGE IN PROPERTIES |
ASTM Oil n° 1 |
Boiling Water |
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Immersion 70h at 150°C |
Immersion 70h at 100°C |
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HT40RP |
HT70RP |
HT40RP |
HT70RP |
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| Shore A Hardness (points), approx. Swelling (volume) %, approx. |
-6 -8 |
-8 +4 |
+2 +1 |
+1 +1 |
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