ETHYLENE PROPYLENE DIENE MONOMER (EPDM)

EPDM rubber is a type of synthetic rubber. It is extremely durable and flexible and therefore has a wide range of applications. In simple terms, pure rubber becomes brittle with temperature variable, wherein synthetic rubber (EPDM) remain flexible and withstand temperature variations for decades. EPDM is a copolymer with elastomeric properties, which means it is a polymer which is both viscous and elastic. If stretched, it will return to its original shape. Its two main components (ethylene and propylene) are both derived from oil and natural gas.

Natural Rubber

Natural Rubber is an elastic substance obtained from the latex sap of trees, especially those trees which belong to the genera Hevea and Ficus. natural rubber is an elastomer or an elastic hydrocarbon polymer that has been widely used in heavy duty applications such as tyres due to the excellent abrasion resistance.

Thermo plastic rubber (TPR)

Thermoplastic rubber is a relatively new class of polymer. It has the solubility and thermo plasticity of polystyrene, while at ambient temperatures it has the toughness and resilience of vulcanized natural rubber or polybutadiene. These compound combines the elasticity of the rubber with the versatility of plastic coloring properties.

Properties Natural EPDM Silicon TPR
Tensile strength Over 3,000 Over 3,000 Over 1,500 Over 3,000
Hardness range 30 - 90 40 - 90 40 - 85 40 - 90
Tear resistance Good Good Poor Good
Abrasion resistance Excellent Good Poor Good
Dielectric strength Excellent Excellent Good Excellent
Electrical insulation Good Excellent Excellent Excellent
Acid resistance Fair Good Excellent Good
Resistance to water absorption Very good Good Good Good
Resistance to oxidation Good Excellent Excellent Excellent
Resistance to ozone Fair Excellent Excellent Excellent
UV resistance Fair Excellent Excellent Excellent
Resistance to ozone Excellent Excellent Excellent Excellent
UV resistance Poor excellent Excellent Good
Heat aging Good Excellent Outstanding Good
Resistance to heat Good Excellent Excellent Good
Resistance to cold Excellent Excellent Excellent Excellent
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