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High rebound (low compresion set) F-HR series
Description:
Translucent or milky white high resilience fluorosilicone compound has good physical properties and processing properties. It has the characteristics of good resilience, low compression set, fast vulcanization speed and good fluidity. It is more suitable for making seal products.
| Item | Test Method |
Performance index |
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|
F-HR30 |
F-HR40 |
F-HR50 |
F-HR60 |
F-HR70 |
F-HR80 |
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|
Appearance |
Visual inspection |
Translucent or grayish white, smooth surface, no impurities |
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|
Hardness (Shore A) |
ASTM D2240 |
30±5 |
40±5 |
50±5 |
60±5 |
70±5 |
80±5 |
|
Tensile strength (MPA) die C |
ASTM D412 |
9.5 | 10.2 | 10.2 | 10.2 | 10.2 | 8.9 |
|
Elongation at break (%) die C |
ASTM D412 |
430 | 410 | 355 | 332 | 270 | 205 |
|
Tear strength (KN / M) die B |
ASTM D624 |
16 | 17 | 17 | 18 | 18 | 17 |
|
Compression set 177 ℃ 22hr (25%) type B |
ASTM D395 |
6.0 | 6.1 | 6.1 | 6.3 | 6.8 | 6.9 |
|
Vertical resilience (%) |
ASTM D2632 |
31 | 31 | 32 | 32 | 32 | 32 |
|
Volume change of reference fuel C (%)(23℃×20h) |
ASTM D471 |
17 | 17 | 17 | 17 | 17 | 17 |
|
Change rate of reference fuel C intensity(%)(23℃×72h) |
ASTM D471 |
-20 |
-20 |
-20 |
-20 |
-20 |
-20 |
|
Change rate of elongation of reference fuel C(%)(23℃×72h) |
ASTM D471 |
-20 |
-20 |
-20 |
-20 |
-20 |
-20 |
|
Change rate of heat resistance at 72℃ (H) |
ASTM D573 |
-17 |
-17 |
-17 |
-17 |
-17 |
-17 |
|
Change in elongation of heat aging |
ASTM D573 |
-10 |
-10 |
-10 |
-10 |
-10 |
-10 |
Note:
1.The curing agent is 2,5 dimethyl-2,5 Di tert butyl hexane peroxide (DBPH), and the dosage is 0.53gDBPH/100g precompound.
2. Press cure: 170 ℃* 10min, post cure: 200 ℃*4H.
Using method:
Mixing: Firstly mixing several times in open mixer, adding vulcanizing agent, keep mixing until the vulcanizing agent fully mixed inside the material; then reduce the roller distance to 0.5mm-1mm and mixing for 8-10 times.
Vulcanization: After above mixing, the rubber mixture with vulcanizing agent will be made into rubber sheet or cut into the required shape, and then molded and vulcanized on the molding machine.
Storage:
Store in a dry environment at room temperature for one year.
