Description: This series is a premixed compound of silicone rubber with good reboundproperties, vulcanizing under heat after addition of a vulcanizing agent thatcould be chosen according to processing requirement.
Special properties:
Ø High rebound and low compression set.
Ø Easy to process and demold, not sticky to 2-rolls.
Ø Slight replastification after prolonged storage
Ø Bright colors easily obtained with color bases.
Ø Wild range of reloading or blending.
Main applications:
Ø SR8XXU can be used to manufacture articles required high rebound and lowcompression set, such as oil ring, gasket and roller,etc.
Characteristics:
Type (according to GB/T5576-1997)................................ VMQ
Naturalcolor...................................................................... translucent
Curing Condition:
Cure for 5 mins at 175℃after addition of 1.1% of 2,5-dimethyl-2-5-di(tert-butylperoxy)hexane (at 45%).
Mechanical properties
Item | Testing Method | Unit | Technical Data |
SR830U | SR840U | SR850U | SR860U | SR870U | SR880U |
Appearance | Visual Observation |
| Translucent | Translucent | Translucent | Translucent | Translucent | Translucent |
Density | ASTM D792 | g/cm3 | 1.07 | 1.10 | 1.14 | 1.16 | 1.19 | 1.22 |
Hardness
(Shore A) | ASTM D2240 | Sha | 34 | 41 | 50 | 63 | 71 | 80 |
Tensile Strength | ASTM D412 | Mpa | 5.6 | 6.1 | 8.9 | 8.5 | 8.9 | 7.2 |
Elongation | ASTM D412 | % | 576 | 435 | 442 | 357 | 289 | 175 |
100% M | ASTM D412 | Mpa | 0.63 | 0.93 | 1.35 | 2.2 | 3.16 | 4.54 |
Tear Strength | ASTM D624 B | N/mm | 8 | 9 | 12 | 18 | 16 | 11 |
Compress Set
(177℃*22h) | ASTM D395 | N/mm | 10 | 7 | 9 | 10 | 11 | 9 |
Rebound | ASTM D395 Method B | % | 67 | 72 | 66 | 58 | 53 | 49 |
