Description: This series is a premixed compound of silicone rubber with economicalgeneral purpose with good balanced properties, vulcanizing under heat afteraddition of a vulcanizing agent that could be chosen according to processingrequirement.
Special properties:
Ø Good balanced properties.
Ø Good appearance.
Ø Easy to process and demold, not sticky to rolls.
Ø Good stability up to 200℃.
Ø Slight replastification after prolonged storage.
Ø Wild range of reloading or blending.
Ø Bright colors easily obtained
Main applications:
Ø Molding article required good balanced mechanical properties ,Moldedarticles,keypad, sealing ring, O-Rings, swimming cap etc.
Characteristics:
Type (according to GB/T5576-1997)................................VMQ
Naturalcolor...................................................................... translucent
Curing Condition:
After addition of 1.1% of 2,5-dimethyl-2-5-di(tert-butylperoxy)hexane (at 45%) and vulcanization for 5min at 175°C.
Mechanical properties
Item | Testing Method | Unit | Technical Data |
SR130U | SR140U | SR150U | SR160U | SR170U |
Appearance | Visual Observation |
| Translucent | Translucent | Translucent | Translucent | Translucent |
Density | ASTM D792 | g/cm3 | 1.08 | 1.13 | 1.17 | 1.19 | 1.21 |
Hardness | ASTM D2240 | Shore A | 29 | 41 | 51 | 59 | 70 |
Tensile Strength | ASTM D412 | Mpa | 8.0 | 6.9 | 8.3 | 8.8 | 8.1 |
Elongation | ASTM D412 | % | 712 | 534 | 420 | 356 | 248 |
100% Modulus | ASTM D412 | Mpa | 0.53 | 0.81 | 1.47 | 1.95 | 3.46 |
Tear Strength | ASTM D624 Die B | N/mm | 13 | 14 | 16 | 18 | 20 |
Rebound | ASTM D395 Method B | % | 73.2 | 73.3 | 65.9 | 59.6 | 56.6 |