ML6 POLYURETHANE RESOURCES
General Resources
Key Resources About Meridian Laboratory








Frequently Asked Questions
Machine keys are not provided with any standard or custom keyed drive roller solution. Contact us if this is something you are looking to have included for a complete turn-key, install-ready component.
Yes, ML6® polyurethane is available in FDA, NSF, and RoHS-compliant formulations which are suitable for food, beverage, and medical applications. REACH compliance and certifications can also be provided upon request. See our Material Safety Data Sheet page for further information.
Set screws are provided on all standard parts that require them and can be included as an additional value-add service for custom drive rollers. Contact us to learn more.
Meridian Laboratory primarily sells directly to end users to ensure the highest level of support and customization for each customer. However, we do work with select partners to provide standard parts worldwide. Contact us or see our ‘Where to Buy’ page for more information.
No, ML6® is a proprietary polyurethane formulation and is only available through finished parts manufactured by Meridian Laboratory. We control the entire process to ensure that maximum quality and performance are delivered. Learn more about ML6 Polyurethane Parts.
Yes, we securely store molds and production data for all orders, enabling fast, repeatable production with no additional tooling costs, ensuring consistency and reducing lead time for reorders. Contact us to learn more.
Yes, we can use customer-supplied molds as long as they meet our production, compatibility, and material requirements. Our engineering team will carefully review your mold design to ensure it aligns with the strict and rigorous standards necessary for producing high-performance ML6® polyurethane parts. While we are happy to accommodate existing tooling when feasible, our preferred approach is to manufacture tooling in-house to guarantee optimal fit, finish, and consistency. If any modifications or concerns arise, we’ll communicate them clearly and work with you to determine the best path forward. Contact us to learn more.
Yes! Recoating old rollers and parts is a very cost-effective method for salvaging old parts. Once we receive the parts, we will prepare the surfaces that are to be coated, as no surface preparation needs to be done by the customer. We will then process your worn parts, prepare, and mold them to the desired final specifications and they will have the same quality and precision as new ML6 molded polyurethane products.
Yes, we can reverse-engineer existing parts by scanning, measuring, and inspecting samples. We’ll match or enhance the original design to deliver a high-performance polyurethane replacement part tailored to your application. Contact us to learn more!
Yes, we offer comprehensive engineering support for design, material selection, and application optimization. Our experienced team can recommend the right ML6® durometer, formula, part geometry, and feature design to ensure top performance in your specific use case. We collaborate closely with customers during the prototype phase and throughout production. Learn more about all of Meridian Laboratory’s capabilities!
Yes, ML6® bonds exceptionally well to metals and plastics when properly prepared. We use proprietary bonding processes and surface treatments to ensure a durable, long-lasting bond to materials such as steel, aluminum, stainless steel, bronze, brass, and engineering plastics. Contact us to learn more.
ML6® polyurethane is a thermoset polyurethane, meaning it cannot be re-melted or reshaped. It is not recyclable, but its durability often reduces replacement frequency and total environmental impact.
Yes, ML6® polyurethane is machinable and can be post-processed to add custom features such as grooves, chamfers, undercuts, and profiles. While our molding process typically achieves tight tolerances and finished dimensions, eliminating the need for secondary machining. We offer some precision grinding and machining when specific geometries or surface modifications are required. This flexibility allows us to deliver both high-performance as-cast surfaces and customized post-mold features based on your application needs. Contact us to learn more.
Yes, we offer flame-retardant ML6® formulations that meet UL 94 V-0 and other flammability standards. These materials are ideal for applications where fire safety is a concern. Contact us to learn more.
Yes, we offer expedited manufacturing and prototyping services for time-sensitive projects. Depending on material availability and workload, we can accelerate both tooling and production to meet your deadlines. Contact us to learn more.
Yes. ML6® can be tailored with additives or formulation changes to meet specific needs like increased or reduced rebound, chemical resistance, anti-static properties, or low compression set. Contact us and let us know your requirements and we’ll engineer the right solution.
Yes, we can help determine the durometer of existing polyurethane or rubber parts. Send us a sample and our team will measure the hardness and provide comparable options for the replacement of them. Contact us to learn more!
Yes. We can mold the polyurethane and machine or manufacture the full gripper assembly, including machined inserts or cores, to your specifications. Contact us to learn more.
Properties
ML6 Polyurethane Material Properties
| ML6-40A | ML6-55A | ML6-70A | ML6-80A | ML6-90A | ML6-60D | ML6-75D | |
|---|---|---|---|---|---|---|---|
| Specified Durometer | 40A | 55A | 70A | 80A | 90A | 60D | 75D |
| Hardness Range | 35 – 45 | 50 – 60 | 72 – 78 | 75 – 85 | 85 – 95 | 55 – 65 (Shore D) | 65 – 75 (Shore D) |
| Abrasion Resistance (Rotary Drum) Volume Loss (mm²) | N/A | 75.51 – 92.29 | 59 – 96 | 40.95 – 50.05 | 43.74 – 53.46 | 91.8 – 112.2 | N/A |
| Ultimate Elongation (%) | 423 – 517 | 414 – 506 | 0 – 0 | 522 – 638 | 378 – 462 | 391.6 – 470.8 | 226.6 – 273.9 |
| Stress at 100% Elongation (PSI) | 175.5 – 214.5 | 319.5 – 390.5 | 408 – 515 | 612 – 748 | 1291.5 – 1578.5 | 3272.5 – 3533.2 | 5592.4 – 5957.6 |
| Stress at 300% Elongation (PSI) | 355.5 – 434.5 | 670.5 – 819.5 | 536 – 1371 | 1309.5 – 1600.5 | 3177 – 3883 | 4587 – 6052.2 | N/A |
| Tensile Strength | 1368 – 1672 | 4293 – 5247 | 3792 – 7176 | 6772.5 – 8277.5 | 7272 – 8888 | 5813.5 – 7333.7 | 7883.7 – 8176.3 |
| Tear Strength, pli Die “C” | 144 – 176 | 238.5 – 291.5 | 285 – 416 | 423 – 517 | 612 – 748 | 757.9 – 820.6 | 960.3 – 961.4 |
| Split | 13.5 – 16.5 | 39.6 – 48.4 | 26 – 79 | 79.2 – 96.8 | 143.1 – 174.9 | 282.7 – 424.6 | 234.3 – 256.3 |
| Compression Modulus (Young’s Modulus) | N/A | N/A | N/A | N/A | N/A | 23545.8 – 28778.2 | 53988.3 – 65985.7 |
| Compression Set (% 22 Hrs. @ 158ºF) |
N/A | 5 | 16.2 – 19.8 | 26 | 26 | 37.8 – 46.2 | N/A |
| Bashore Rebound (%) | 38.7 – 47.3 | 19.8 – 24.2 | 20-31 | 23.4 – 28.6 | 24.3 – 29.7 | 52.2 – 63.8 | 54.9 – 67.1 |
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