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(28 reviews)
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PMC™-790 is a Shore 90A industrial polyurethane elastomer designed to produce very hard, strong, and durable parts. It offers excellent tensile strength, tear resistance, impact resistance, and abrasion resistance.
It is particularly suited to industrial rollers, wheels, guide rollers, belts, mechanical parts, wear-resistant protections, and other components subjected to repeated friction or stress.
Despite its high hardness, PMC™-790 remains a true elastomer: it retains good deformation capacity with an elongation at break of up to 550%. Its very low shrinkage also enables precise, dimensionally stable parts to be produced.
Hardness (Shore A): 90
Ratio A:B: 2:1
Working time (min): 20
Demould time (h at 23 °C): 48
Viscosity (cP): 3000
Density (g/cm³): 1.07
Elongation at break (%): 550
Tensile strength (psi): 2000
Tear strength (pli): 30
Shrinkage (in/in): <0.001
Colour: Transparent amber
With a Shore 90A hardness, PMC™-790 is a very firm elastomer. It remains elastic, however, and can achieve approximately 550% elongation at break.
PMC™-790 is harder: 90A versus 80A for PMC™-780. It also has higher tensile and tear strength, whilst PMC™-780 remains more flexible.
Yes. It is specially designed for industrial applications requiring excellent resistance to abrasion, impact, tension, and tearing.
Not necessarily, but vacuum degassing further reduces trapped air. Pressure casting can produce parts practically free of bubbles.
Polyurethanes are sensitive to moisture. Tools, containers, fillers, and substrates must be perfectly dry, and packaging resealed quickly after use.
Yes. After curing at room temperature, post-curing at 65 °C for 4 to 8 hours improves its physical properties and performance.
