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High tear resistant F-HTR series
Description:
Translucent or milky white high tear resistant fluorosilicone compound has good physical and processing properties. It has the characteristics of good tear resistance performance, fast vulcanization speed and good fluidity. It is more suitable for making seal products with complex structure.
| Item | Test Method |
Performance index |
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|
F-HTR40 |
F-HTR50 |
F-HTR60 |
F-HTR70 |
F-HTR80 |
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|
Appearance |
Visual inspection |
Translucent or grayish white, smooth surface, no impurities |
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|
Hardness (Shore A) |
ASTM D2240 |
40±5 |
50±5 |
60±5 |
70±5 |
80±5 |
|
|
Tensile strength (MPA) die C |
ASTM D412 |
11.5 | 11.6 | 11.7 | 9.3 | 8.7 | |
|
Elongation at break (%) die C |
ASTM D412 |
483 |
420 | 392 | 322 | 183 | |
|
Tear strength (KN / M) die B |
ASTM D624 |
41 | 43 | 43 | 35 | 30 | |
|
Compression set 177 ℃ 22hr (25%) type B |
ASTM D395 |
13 | 14 | 16 | 17 | 20 | |
|
Volume change of reference fuel C (%)(23℃×20h) |
ASTM D471 |
17 | 17 | 17 | 17 | 17 | |
|
Reference fuel C intensity(%)(23℃×72h) |
ASTM D471 |
-20 | -20 | -20 | -20 |
-20 |
|
|
Change in elongation of reference fuel C (%)(23℃×72h) |
ASTM D471 |
-20 | -20 | -20 | -20 |
-20 |
|
|
Change rate of strength of heat aging resistance(%)(225℃×72h) |
ASTM D573 |
-20 | -20 | -20 | -20 |
-20 |
|
|
Heat aging resistance elongation change rate (%) (72 h at 225 ℃) |
ASTM D573 |
-20 | -20 | -20 | -20 | -20 | |
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.
