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SRKP uses the latest equipment and technology for testing of raw materials, compounds and the finished products. We have a laboratory that is very well equipped and our chemists and engineers have extensive academic and practical knowledge and experience in the rubber industry. The following are the key areas under testing
Chemical Properties | Type of samples | ASTM Standards | Significance |
---|---|---|---|
Heat loss | Carbon black, antioxidants, zinc oxide | D1509, D4571 | This test indicates the low boiling organic materials |
PH value | Carbon black, silica, clay, latex | D1512, D1417 | This test indicates the acidity/alkalinity of the materials |
Surface area | Carbon black, silica, zinc oxide | D4820 | This test indicates the available surface area of the materials for interaction with the rubber molecule |
Physical Properties | Type of Samples | ASTM Standards | Significance |
---|---|---|---|
Low temperature resistance | Rubber Compound | D832 | With standing temperature of compound |
Fuel resistance | Rubber Compound | D471 | Swelling percentage of rubber |
Flex cracking | Rubber Compound | D813 | Crack resistance of compound |
Water resistance | Rubber Compound | D6284 | Swelling of compound with eater |
Storage conditions are important for product usage after longer storing. Ageing effect continues even at room temperature even though very slow.
Hence it is advised to store the rubber product away from heat, Sunlight & moisture, preferably covered with black poly. Contact with grease, solvent, oil etc. should be strictly avoided.
Also FIFO system and storage stack height / rotation should be followed if stored for longer time to avoid any de-shaping.
S.No | Rubber Type | ASTM Designation | Shelf life (Years) |
---|---|---|---|
1 | Nitrile Butadiene Rubber | NBR | Up to 5 |
2 | Polyisoprene | NR/IR | Up to 2 |
3 | Styrene | SBR | Up to 3 |
4 | Ethylene propylene | EPDM/EPM | Up to 7 |
5 | Chloroprene | CR | Up to 10 |
6 | Polyurethane | EU | Up to 10 |
7 | Fluorocarbon | FKM | Up to 20 |
8 | Silicone | Q | Up to 20 |
9 | Fluorosilicone | FVMQ | Up to 20 |
10 | Polyacrylic | ACM/ANM | Up to 20 |