Description: SR32XX UDP series are phenyl silicone rubbers with good resistance toradiation and low & high temperature.
Special properties:
Ø Resistance to crepharding.
Ø Good mechanical properties.
Ø Excellent resistance to low temperature and radiation.
Ø Wide operating temperature -100℃~250℃.
Ø Easily processed and easily pigmented.
Main applications:
Ø Automotive industry: all kinds of vehicle seal ring, oil seal,diaphragm, conduit, valve lining, etc.
Ø Petrochemical industry: all kinds of high temperature, low temperature,chemical erosion resistance pump, valve, oil tank and other equipment sealingproducts.
Ø Astronomy industry: aircraft fuel oil and lubricating oil seals, contactparts, such as all kinds of O ring, filling, sealing ring, sensor materials,diaphragm, liner clamp.
Ø Military industry: low temperature resistance/oil resistance/acidresistance in harsh environment, such as military aircraft hydraulic systeminfusion bellows, sealing strip of special vehicle doors and Windows/backcover, sensor materials.
Characteristics:
Type (according to GB/T5576-1997)................................PVMQ
Naturalcolor.......................................................translucent, smoothsurface, no impurities
Curing Condition:
After addition of 1.2% of 2.5-dimethyl bis-(tertiobutyl peroxy) 2.5-hexane (45%) and vulcanization for 5 min. at 180°C, withpost curing at 200℃×4hour.
Mechanical properties:
Item | Testing Method | Unit | SR3250UDP | SR3270UDP | SR3280UDP |
Density | ASTM D792 | g/cm3 | 1.25 | 1.26 | 1.27 |
Hardness(Shore A) | ASTM D2240 |
| 50 | 69 | 80 |
Tensile Strength | ASTM D412 | MPa | 9.5 | 10.2 | 9.2 |
Elongation at Break | ASTM D412 | % | 550 | 400 | 140 |
Tear Strength (Right Angle) | ASTM D 624 C | kN/m | 28 | 35 | 19 |
Brittle Temperature |
| ℃ | -100℃ | -100℃ | -100℃ |
Mechanical properties 1.1 Performance changes after aging at 225℃×72H |
Hardness(Shore A) | ASTM D2240 |
| 52 | 71 | 82 |
Tensile Strength | ASTM D412 | MPa | 9.2 | 9.6 | 9.0 |
Elongation at Break | ASTM D412 | % | 400 | 310 | 120 |
Mechanical properties 1.2 Performance changes after aging at 250℃×72H |
Hardness(Shore A) | ASTM D2240 |
| 56 | 75 | 85 |
Tensile Strength | ASTM D412 | MPa | 5.2 | 5.4 | 5.6 |
Elongation at Break | ASTM D412 | % | 340 | 270 | 80 |
Packaging:20 kg per cardboard boxes.