Hebei Shida Seal Group is a custom Chinese manufacturer of dual durometer extrusions. Various materials include EPDM, nitrile rubber, neoprene, thermoplastics and VMQ. Capabilities include extruding, molding, splicing & stripping, cut lengths & continuous coils.. Secondary services include labeling, packaging, vulcanizing, analysis and inspection. Small to large run production can be done. Automotive, bus, electronics, filters, HVAC, mining, pharmaceutical and various other industries served.
Description:
EPDM Solid and Sponge Co-extruded Seal, Rubber Extruded Dual Durometer Extrusions
Introduction:
Dual durometer rubber extrusions are profiles with different areas of hardness.
Typically, the harder rubber is used for attachment while the softer rubber is used for sealing. By joining two materials of different physical properties, structural integrity and flexible function can be combined into one part. For example, when a rubber gasket must be an attachment to a metal part to provide a closure seal, a dual durometer rubber extrusion combines both functions into one piece, which significantly reduces assembly costs while enhancing performance and function.
Dual Durometer extrusions can serve a variety of purposes. Most often, the harder material serves as a means of attachment, the softer compound completes the seal. Sometimes, however, Co-extruding polymers are done for cosmetic purposes. There are many ways to get creative when designing a seal-using multi-color, multi-durometer, notches, holes, and PSAs.
Technical Data:
| Specification | Value |
| Material | EPDM |
| Hardness (Shore A) | 65-75 |
| Tensile Strength (MPA) | 7-10 |
| Elongation @ Break (%) | 300 |
| Tear Strength (kN/m) | 50 |
| Compression Set (22 hours, 70°C (%)) | 21 |
| Ozone Resistance (72 hours, 40°C, 22PPHM, EXT) | No Cracks |
| Age 70 hours at 70°C – Hardness Change (IRHD) | 0 |
| Tensile Change (%) | +9 |
| Elongation at break | 0 |
| Material | EPDM Sponge |
| Density Range | 0.5 – 0.9 gm/cm³ |
| Oven Ageing (7 days, 70°C) | ±30% |
| Water Absorption | 5% Maximum |
| Compression (24 hours recovery) | 25% Maximum |
| Ozone Resistance | Excellent |
| Weather Resistance | Excellent |
| Low Temperature Flexibility (-40°C) | Pass |
| UV Light Resistance | Excellent |
Application:
Products are widely used in wood windows and doors, aluminium systems for windows, doors and facades, PVC windows and doors. We offer profiles from a comprehensive range of elastomer and thermoplastic materials including multi-component composite solutions. Supported by the polymer materials expertise available, we can offer a full range of materials, surface treatments and fabrication techniques to suit almost every environment and application.
Why Choosing Hebei Shida Seal Group?
We always manufacture our rubber dual durometer extrusions from the highest quality compounds available. This ensures that our rubber extrusions are not only suitable for use, but also made to last. Despite offering high strength and tear resistance, our sponge rubber profiles are also highly flexible. This enables our profiles to fit around a wide variety of curves.
Our facility is fully equipped with the latest equipment and technology, providing us with the capability to manufacture precision extruded rubber dual durometer extrusions in quantities from short run to full production runs. We have 5 extrusion lines, continuous cure microwave, precision cutting, and splicing machines, and also provide value-added finishing services. In addition, we offer in-house tool, and mold design and manufacturing to ensure that your parts are manufactured to the most exacting requirements.
Hebei Shida Seal Group is uniquely qualified to manufacture EPDM rubber dual durometer extrusions for your application. Our quality management system is IATF 16949:2016 accredited. We can provide PPAP Level 3 documents for OEM clients.
If you want to contact us about any issue please call (+86)319 8032626 or send us an e-mail. If you would like to submit a proposal for consideration simply submit a quote.