Rubber Production Capability
Ro-Lab has the press capacity for small, high-volume production as well as production of large-scale parts. We have over 75 presses up to 80” wide with 40-2500 ton capacity. Platen sizes are up to 20 feet long and 50 feet wide. In-house Branbury mixing allows us to produce custom compounds.
Ro-Lab has several processes available to produce the ideal rubber part for your application.
Rubber Basics – There are two types of rubber, natural and synthetic. Natural rubber is an elastic polymeric substance made from latex of a tropical plant and synthetic rubber is produced from the polymerization of oil byproducts. Rubber whether natural or synthetic, is a great alternative to plastic and metal for applications that require a more elastic solution. Rubber also has waterproof, electrical insulating and tearing resistant properties. Some types of rubber are resistant to oils, solvents and other chemicals.
Durometer (hardness) – Depending on the type of rubber the hardness will range from Shore A (softer) to Shore D (harder) to Shore 00 (foam/sponge). Rubber products range from sponges and erasers to bowling balls and tires.
Tensile & Tear Strength – The tensile (tension) and tear strength of rubber will vary based on the type of rubber. For the most part, rubber in general has a fair to excellent tear and tensile strength. Therefore it is important to select the proper rubber type that best fits your application.
| Advantages | Varied Resistances Levels |
| Elasticity | Abrasion |
| Resilience | Impact |
| Hardness Flexibility | Shearing/Tearing |
| Tensile & Tear Strength Flexibility | Atmospheric (Oxygen/Ozone/UV) |
| Machinability | Temperature |
| Noise Reduction | Water |
| Vibration Reduction | Chemicals |
| Property | Polyurethane | Nitrile Rubber | Neoprene Rubber | Natural Rubber | SBR | Butyl |
| Tensile Strength (MPa) | 20.7 to 65.5 | 13.8+/- | 20.7+/- | 20.7+/- | 18.8+/- | 18.8+/- |
| Durometer | 5A to 85D | 40 to 95A | 40 to 95A | 30 to 90A | 40 to 90A | 40 to 75A |
| Specific Gravity | 1.10 to 1.24 | 1.0 | 1.23 | 0.93 | 0.94 | 0.92 |
| Tear Resistance | Outstanding | Fair | Good | Good | Fair | Good |
| Abrasion Resistance | Outstanding | Good | Excellent | Excellent | Good-Excellent | Good |
| Compression Set | Good | Good | Fair-Good | Good | Good | Fair |
| Rebound | Very High to Very Low | Medium | High | Very High | Medium | Very Low |
| Gas Permeability | Fair-Good | Fair | Low | Fair | Fair | Very Low |
| Acid Resistance | Fair-Good | Good | Excellent | Fair-Good | Fair-Good | Excellent |
| Aliphatic Hydrocarbons | Excellent | Excellent | Good | Poor | Poor | Poor |
| Aromatic Hydrocarbons | Fair-Good | Good | Fair | Poor | Poor | Poor |
| Oil and Gas Resistance | Excellent | Excellent | Good | Poor | Poor | Poor |
| Oxidation Resistance | Outstanding | Good | Excellent | Good | Good | Excellent |
| Ozone Resistance | Outstanding | Fair | Excellent | Fair | Fair | Excellent |
| Low Temperature Resistance | Excellent | Good | Good | Excellent | Excellent | Good |
Durometer (Hardness) Scales
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