Rubber extrusion profiles are manufactured through the extrusion process, where rubber compounds or elastomers are heated and processed by machinery before being forced through a mold with a specific cross-sectional shape to produce continuous profiles with the desired shape. The molds are custom-made and can accommodate various types of rubber profiles to suit different sealing applications and complex environments.
The length of extruded profile products can be customized. Extruded rubber profiles are lightweight, flexible, highly durable, and have a long service life, making them suitable for a wide range of harsh or extreme environments.
Types Of Extruded Rubber Profiles
Hollow Extruded Rubber Profiles–extruded rubber tubing
Hollow extruded rubber profiles have a hollow center, typically in the form of a tube or other geometric shapes. The hollow design makes them lightweight and flexible, providing effective sealing performance while reducing overall material usage and weight. These seals are commonly used in areas where moderate sealing pressure is sufficient, such as doors, windows, and HVAC systems.
Common types of extruded rubber tubing include round, square, and triangular.
Extruded Rubber Profiles With Multilayer Chamber
Compared to single-hole extruded rubber profiles, these offer better thermal and acoustic insulation, as well as greater flexibility and deformability. Eextruded rubber profiles with multilayer chamber are suitable for sealing larger, uneven, or complex gaps, as well as applications that require higher insulation. Commonly used for sealing automotive doors, soundproof room doors, and temperature-sensitive areas, among others.
Solid Extruded Rubber Profiles
These profiles are made from solid rubber, with no hollow or porous structure. They are typically used in applications that require strength, durability, and high sealing pressure. They have excellent compression resistance, shape retention, and wear resistance. Commonly used for sealing industrial equipment, heavy machinery, and high-performance automotive seals.
Special Shapes Extruded Rubber Profiles
These are extruded rubber profiles designed with custom shapes to meet specific application needs. They can feature complex geometries such as flange seals or multi-chamber designs. Custom-shaped rubber seals are typically used for sealing irregular gaps or narrow spaces where standard profiles would not be effective. They come in a wide variety of shapes, with common types including C-shaped, D-shaped, E-shaped, L-shaped, P-shaped, H-shaped, T-shaped, U-shaped, and more.
These extruded rubber seals profiles provide versatile solutions in areas where standard shapes are ineffective. For example:
T-Shaped Extruded Rubber Profiles
The longer end of the T-shaped extruded rubber profiles can be inserted into gaps, while the flat surface covers the outer surface. It is ideal for covering gaps and surfaces. The profile can be cut to fit different gap widths and depths, ensuring optimal sealing performance.
H-Shaped Extruded Rubber Profiles
H-shaped extruded rubber profiles can be wedged between two adjacent panels or sheets to form a seal, without the need for adhesive, making them easy to install. They are commonly used for sealing gaps in photovoltaic panels and mechanical equipment.
P-Shaped Extruded Rubber Profiles
The extended part of P-shaped extruded rubber profiles can fit into narrower gaps, making them ideal for embedded installation. The end with the spherical hole provides better vibration damping and sealing performance.
U-Shaped Extruded Rubber Profiles
U-shaped extruded rubber profiles are ideal for edge decoration and sealing, as well as edge protection. The bottom of the U-shaped profile can be flat or spherical, with the spherical design offering enhanced vibration damping and impact resistance.
Extruded rubber profiles can also be classified into foamed and solid types based on the density and rigidity of the material.
Foamed extruded rubber profiles are made by introducing a blowing agent into the rubber during the extrusion process. This causes the rubber to expand and form small air pockets, resulting in a cellular or honeycomb structure. The differences between foamed and solid rubber profiles are summarized in the table below:
| Feature | Foamed extruded rubber profiles | Solid extruded rubber profiles |
| Example image |  |  |
| Density | Lower density, lightweight | Higher density, heavier |
| Flexibility | More flexible and compressible | Less flexible, more rigid |
| Strength | Lower mechanical strength, not for heavy-duty applications | Higher strength, better for heavy-duty applications |
| Compression Set | Better at returning to original shape after compression | Can deform permanently under prolonged compression |
| Insulation Properties | Good for thermal and acoustic insulation | Limited insulation properties |
| Seal Effectiveness | Less effective at high compression or high-pressure seals | Provides tight, effective seals in high-pressure environments |
| Durability | Less durable, may compress and deform over time | More durable, resists wear and tear better |
| Applications | Low-pressure seals, soundproofing, vibration dampening, packaging | High-pressure seals, industrial gaskets, weatherproofing, automotive, aerospace |
The common materials for non-foamed extruded rubber profiles are EPDM, Chloroprene Rubber (Neoprene), Nitrile Rubber (Buna-N), and Fluoroelastomers (e.g., Viton).
The common materials for foamed extruded rubber profiles are EPDM, Silicone Rubber, Chloroprene Rubber (Neoprene), and Polyurethane Rubber.
These materials are selected based on specific application needs, such as sealing performance, flexibility, and resistance to environmental factors.
Material Types For Extruded Rubber Profiles
These extruded rubber profiles are typically made from flexible elastomers such as EPDM, Nitrile Rubber (Buna-N), or Silicone Rubber. The choice of material depends on the specific requirements of the application. For example, in terms of temperature resistance and elasticity:
Temperature Resistance (from low to high):
EPDM, Chloroprene Rubber (Neoprene), Acrylic Rubber, Butyl Rubber, Polyurethane, Silicone Rubber, Fluoroelastomers (e.g., Viton).
Elasticity (from high to low):
Silicone Rubber, Polyurethane, EPDM, Chloroprene Rubber (Neoprene), Acrylic Rubber, Butyl Rubber, Fluoroelastomers.
The selection of a specific material is based on the needs for temperature stability, flexibility, compression set, and other environmental and mechanical factors relevant to the application.
- EPDM (Ethylene Propylene Diene Monomer) has excellent weather resistance, ozone resistance, UV radiation resistance, and extreme temperature tolerance. It is also resistant to water, steam, and many chemicals, making it an ideal choice for outdoor, automotive, and industrial applications. Due to its flexibility, durability, and resistance to environmental factors, EPDM is commonly used in a variety of extruded shapes, including H-shaped profiles.
- Silicone Rubber is used in a wide range of profiles and is known for its exceptional high-temperature resistance (from -50°C to +230°C), flexibility, and UV stability. It also has excellent biocompatibility, making it suitable for food processing, medical devices, and high-temperature applications.
- Chloroprene Rubber (Neoprene) is known for its excellent resistance to oil, fuel, ozone, and weathering. It also offers good flexibility, moderate temperature resistance (from -40°C to +120°C), and resistance to aging and degradation. It is commonly used in automotive, construction, and industrial applications.
- Nitrile Rubber (Buna-N) has strong resistance to oil, fuel, and chemicals. It also has good mechanical properties and wear resistance. However, it is not as weather-resistant or UV-resistant as EPDM or silicone rubber.
- Polyurethane Rubber offers exceptional abrasion resistance, high tensile strength, and excellent resistance to oils, greases, and various chemicals. It performs well in low temperatures and has a high load-bearing capacity. It is typically used in profiles that need to withstand heavy wear, such as in machinery or automotive applications.
- Butyl Rubber is highly impermeable to gases and moisture, making it ideal for vacuum and airtight applications. It also has good chemical resistance and is suitable for environments where low permeability is critical.
- Fluoroelastomers are known for their excellent chemical resistance and high-temperature tolerance (up to 300°C or higher), making them suitable for harsh chemical environments. They also maintain excellent flexibility and sealing performance at high temperatures.
- These materials are chosen based on their specific properties, such as temperature resistance, chemical resistance, flexibility, and mechanical strength, to suit various sealing, insulating, and protective applications.
At Lingo, we offer a full range of products suitable for any application, with a wide variety of materials. We are capable of customizing composite materials, colors, lengths, and shapes to meet specific customer requirements. If needed, we can also provide adhesives.
