Dual Durometer Rubber Extrusions | Coextruded Rubber Profiles
Dual durometer rubber products are extrusions with different areas of hardness. Typically, the harder rubber is used for attachment while the softer rubber is used for sealing. Sometimes, different materials are used because of design considerations such product color schemes or the use of pressure-sensitive adhesives (PSAs).
By fabricating dual durometer rubber into a single part, a product such as window seal can have areas with different physical properties to meet application requirements. With window channels, the harder window rubber attaches to the window frame and the softer window rubber faces the glass window. Durometer is not limited to window seals, however, and is used with both sponge and solid profiles.
Dual Durometer: Sponge and Solid
EPDM Sponge rubber can be shaped into various industrial rubber products, including dual durometer profiles. By combining sponge rubber and solid rubber into a single part (such as bulb trim seals), different areas of hardness are achieved. Typically, sponge profiles are characterized as soft, medium, and firm. Sponge rubber is closed cell.
EPDM Solid rubber is harder than sponge rubber and, therefore, most resistant to compression. Most solid profiles range from under 30 duro to 90 duro Shore A, depending on their shape. At 40 duro, solid rubber profiles have the consistency of pencil erasers. At 90 duro, they are hard like hockey pucks. Under low temperature conditions, solid profiles become harder.
Dual Durometer Materials and Specifications
Standard dual durometer products such as bulb seals are often made of EPDM or TPE. A type of synthetic rubber, EPDM provides insulation against hot and cold temperatures. Thermoplastic elastomers (TPE) are rubber-like materials that combine the processing strengths of thermoplastics with the best qualities of thermoset rubbers.
When choosing standard dual durometer seals, consider product specifications such as materials, applications, seal dimensions, quantity per box, and quantity per coil. Tooling costs are higher for custom, complex parts; however, a wide range of standard, in-stock dual durometer profiles are available.
About Us:
Hebei Shida Seal Group is a leading manufacturer of Co-extruded Dual Durometer Sponge and Solid Rubber Extrusions and molded rubber parts from Qinghe, Hebei, China.
With combined experience within the industry, we have developed the talent, technical knowledge, engineering expertise and equipment to manufacture Special Profiles meeting the most stringent specifications. Our in-house tool and mould making as well as state-of-the-art development, manufacturing and testing methods ensure a maximum of product quality and reliability.
Capabilities:
- Certified to IATF (International Automotive Task Force) 16949
- Certified to ISO 14001 and ISO 45001 (Environment, Health and Safety)
- Production area 40,000 m²
- Processing of: EPDM Dense and Sponge, CR, NBR
- 5 continuous vulcanization (microwave + hot air ) extrusion lines
- 2 components extrudable
- 3 components extrudable
- Cutting and punching machines for precise lenghts
- Injection presses for mould corners
- Film vulcanization for corners and rings
Main Products:
- Custom EPDM Rubber Extrusions
- Automotive Weatherstripping, Door Seals, Window Seals
- Edge Trims & Seals,Self-Sealing Weatherstrips
- EPDM rubber mouldings
- Molded Rubber Bellows, Dust Covers
- Engineered TPV/TPE Profiles
- Co-extruded Trim Seals (dual durometers with a Metal Core, Segmented Steel or Wire Carrier)
Contact Us:
If your applications require Dual Durometer Rubber Extrusions and Coextruded Rubber Profiles, please feel free to contact us. We are committed to supplying our customers with robust rubber components and outstanding services.