Description: This series is a premixed compound of silicone rubber with good physicalstrength, vulcanizing under heat after addition of a vulcanizing agent thatcould be chosen according to processing requirement.
Special properties:
Ø Good mechanical properties.
Ø Excellent appearance.
Ø Easy to process and demold, not sticky to rolls.
Ø Good stability up to 200℃.
Ø Slight replastification after prolonged storage.
Ø No post-cure or slight post-cure.
Ø Wild range of reloading or blending.
Main applications:
Ø Molding article required good mechanical properties and appearance.
Characteristics:
Type (according to GB/T 5576-1997)................................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 5 min at 175°C.
Mechanical properties
Item | Testing Method | Unit | Technical Data |
515U | 520U | 530U | 540U | 550U | 560U | 570U | 580U |
Appearance | Visual Observation |
| Translucent | Translucent | Translucent | Translucent | Translucent | Translucent | Translucent | Translucent |
Density | ASTM D792 | g/cm3 | 1.07 | 1.07 | 1.08 | 1.12 | 1.16 | 1.18 | 1.21 | 1.23 |
Hardness | ASTM D2240 | Sha | 16 | 20 | 30 | 41 | 50 | 60 | 70 | 80 |
(Shore A) |
Tensile Strength | ASTM D412 | Mpa | 5.6 | 5.8 | 8.1 | 9.2 | 8.8 | 8.9 | 8.5 | 8.1 |
Elongation | ASTM D412 | % | 1210 | 1123 | 835 | 708 | 573 | 450 | 383 | 221 |
100% M | ASTM D412 | Mpa | 0.19 | 0.30 | 0.46 | 0.75 | 1.14 | 1.87 | 2.87 | 4.16 |
Tear Strength B | ASTM D624 Die B | N/mm | 14 | 15 | 12 | 17 | 17 | 18 | 19 | 16 |
Tear Strength C | ASTM D624 Die C | N/mm | 16 | 16 | 17 | 19 | 22 | 26 | 24 | 24 |
Compress Set | ASTM D395 Method B | % | NA | 37 | 41 | 27 | 28 | 21 | 19 | 16 |
(177℃*22h) |
Rebound | ASTM D395 Method B | % | 54 | 53 | 60 | 59 | 53 | 52 | 45 | 44 |
