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| Common Name | ASTM Designation |
General Properties | Belt Types |
|---|---|---|---|
| Butyl | IIR | Excellent weathering resistance; low permeability to gases; good resistance to ozone and aging; low tensile strength and resilience. | White butyl, High-Heat Resistant 2 Ply 220 and 3 Ply 330 |
| EPDM | EPDM | Excellent weather, ozone and UV resistance; excellent resistance to ketone solvents; superior heat resistance when peroxide cured. | High heat resistant 2 Ply 220 and 3 Ply 330 |
| Natural Rubber | NR | Excellent physical properties; good resistance to cutting, gouging and abrasion; low heat, ozone and oil resistance. | Pure Gum Roughtop and Steepgrade |
| Neoprene | CR | Excellent ozone, heat and weathering resistance; good oil resistance; excellent flame resistance. | Compound not currently used in belting industry. |
| Nitrile/Buna-N | NBR | Excellent resistance to vegetable, animal and petroleum oils; poor low-temperature resistance. | White nitrile food belts; black nitrile light duty; SOR Hot Asphalt |
| PVC | (None) | Excellent resistance against acids and chemicals. Weathers well. Limited high and low temperature capability. Obtains other physicals only in combination with polyester carcass. | All white and black PVC conveyor and elevator belts; monofilament thermoplastic |
| SBR | SBR | Good physical properties; excellent abrasion resistance; not oil, ozone, or weather resistant. | Standard RMA-II H.D. conveyor; all transmission; most incline; skirtboard |
| Teflon | AFMV | Excellent chemical resistance. Excellent high and low temperature properties. | White polyester teflon |
| Urethane | PU | Exceptional abrasion, cut and tear resistance; high modulus and hardness. | Urethane #900; 3 Ply 1/8" Urethane x FS; Urethane Roughtop, Ure-clad |
| Common Name | Abrasion Resistance |
Chemical Resistance | Cold Resistance |
Heat Resistance | Ozone Sunlight Resistance |
Petroleum Oil Resistance | Solvent Resistance |
Vegetable Oil-Animal Fat Resist. | Weather Resistance |
|---|---|---|---|---|---|---|---|---|---|
| Butyl | F | E | G | E | E | NR | F-G | F | E |
| EPDM | F-G | E | G | E | E | NR | F-G | NR | E |
| Natural Rubber | E | G | E | F | NR | NR | NR | NR | F |
| Neoprene | G-E | G | G | G | VG | G | NR | G | E |
| Nitrile/ Buna-N | G | G | G-F | G | F | G-E | F | E | F |
| PVC | G | G | F | F | G | G | G | G | G |
| SBR | E | G | VG | F-G | F-G | NR | NR | NR | F |
| Teflon | NR | E | E | E | E | E | E | E | E |
| Urethane | E | F | F | G | VG | VG | NR | VG | E |
Key: E=Excellent VG=Very Good G=Good F=Fair NR=Not Recommended
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