Nomex pads and padding are used in industrial applications that require heat-resistant cushioning, surface protection, or a stable contact layer. Common uses include aluminum extrusion handling, commercial laundry ironers, textile processing, and selected industrial equipment. The appropriate product depends on operating temperature, mechanical load, wear conditions, and the requirements of the equipment.
Although Nomex is widely associated with heat-resistant materials, its applications extend beyond thermal protection. In industrial equipment, the structure, thickness, density, and shape of the finished felt also determine how it performs.
What Are Nomex Pads and Padding?
Nomex® is a meta-aramid fiber known for its inherent heat and flame resistance. It is available in different forms, including fibers, yarns, fabrics, and paper, which serve different industrial purposes. Nomex felt pads and padding are specific products made from Nomex fibers and formed into structures suitable for particular applications.
The terms pad and padding generally describe different product forms and uses. Nomex felt pads are often cut into specific shapes for equipment or material handling, while Nomex padding can refer to a continuous felt layer wrapped around rollers or used as a cushioning surface.
These products should not be confused with Nomex paper used for electrical insulation or Nomex fabric used in protective clothing. Although they share the same fiber family, their construction and performance requirements differ.
What Are the Main Uses of Nomex Pads and Padding?
1. Aluminum Extrusion and Profile Handling
Aluminum extrusion is an important application for heat-resistant industrial felt. After leaving the extrusion press, aluminum profiles pass through different handling and cooling stages before further processing or packing.
Felt pads can help protect profile surfaces by reducing direct contact with metal handling components. Depending on the production line, they may be installed on cooling tables, handling tables, or other equipment where profiles contact support surfaces.
Nomex felt is particularly relevant to suitable intermediate-temperature areas. The hottest press-exit and initial handling positions may require higher-temperature materials, such as PBO or Kevlar-based constructions, depending on the actual conditions.
Nomex pads can provide several benefits in appropriate applications:
- Surface protection: Help reduce scratches, dents, and other contact-related damage.
- Heat resistance: Withstand temperatures within the product’s specified operating range.
- Cushioning: Provide a felt contact layer between profiles and equipment.
- Application-specific fit: Custom dimensions help the pads fit the equipment and contact area.
The correct material must be selected according to profile temperature, contact time, line speed, mechanical loading, and the required surface finish. Nomex is not automatically the best choice for every section of an extrusion line.
2. Commercial Laundry and Industrial Flatwork Ironers
Nomex padding is also used in commercial laundry equipment, particularly high-speed flatwork ironers that process large textiles such as bed sheets, tablecloths, and other linen.
In these machines, padding surrounds or covers heated rolls, providing a resilient contact layer between the heated equipment and the fabric being processed. Its structure influences contact uniformity, heat transfer, steam passage, and the quality of the finished textile.
Nomex padding is used in suitable high-temperature ironers, including some machines heated by thermal oil. For example, commercially available Nomex ironer padding is specified for applications operating at temperatures up to 240°C. This figure applies to the particular product specification, not to every Nomex padding product.
Important functions include:
- Providing a smooth and resilient ironing surface
- Supporting consistent contact between the heated roll and the fabric
- Allowing steam to pass through suitable felt structures
- Maintaining performance under repeated compression and heat exposure
Padding thickness, basis weight, working width, and heating method should match the ironer. Incorrect specifications or worn padding can affect ironing consistency and finished fabric quality.
3. Textile Processing and Heat Transfer
Nomex felt and other heat-resistant felt constructions can be used in selected textile-processing applications, including heat transfer, heat pressing, pleating, and finishing.
In these processes, felt may serve as a supporting layer or blanket between machine components and the textile. Depending on the equipment, it can help distribute contact pressure, provide cushioning, and withstand repeated thermal exposure.
Potential applications include:
- Heat transfer printing
- Textile heat pressing
- Pleating and fabric shaping
- Selected textile finishing processes
However, not every heat-transfer machine requires Nomex felt. Some applications use other aramid fibers, different felt constructions, or specialized belts and blankets. The appropriate material depends on temperature, pressure, machine design, and the required finish.
4. Steel Processing and Other Industrial Equipment
Industrial felt pads and padding are also used in selected metal-processing and machinery applications where a contact layer is needed to support, separate, cushion, or protect components.
For example, felt pads may be used in equipment handling metal sheets or coils, while specialized felt components can provide controlled contact between machine parts and processed materials.
The material must match the actual operating conditions. Nomex may be suitable for certain heat-exposed applications, but other industrial felt materials may be more appropriate where abrasion, tensile strength, chemical exposure, or a different temperature range is the primary concern.
It is therefore important to distinguish between applications for industrial felt in general and those that specifically require Nomex.
Why Is Nomex Used for Industrial Pads and Padding?
Nomex is selected for certain industrial applications because its material characteristics support performance under heat and repeated use. However, the performance of a finished pad depends on more than the fiber alone.
Heat and Flame Resistance
Nomex fibers have inherent heat and flame resistance. Unlike conventional thermoplastic fibers that can melt and drip under heat, Nomex fibers do not melt in the same way and can char after prolonged exposure to high temperatures.
This makes Nomex useful in applications where thermal stability is important. Nevertheless, the maximum operating temperature depends on the finished product, exposure duration, mechanical load, and other working conditions.
Cushioning and Contact Performance
Felt structures can provide a resilient contact surface between materials and equipment. Depending on their density, thickness, and construction, they can help accommodate contact pressure and reduce direct contact with harder surfaces.
These characteristics are relevant to aluminum profile handling and industrial ironing, although the required cushioning behavior differs between the two applications.
Wear Resistance and Dimensional Stability
Industrial pads and padding may experience repeated compression, friction, and thermal cycling. A suitable fiber and felt construction can help maintain the required shape and performance over time.
Wear resistance is not determined by fiber type alone. Density, needle-punched structure, surface finish, operating speed, and contact pressure can all affect service life.
What Types of Nomex Pads and Padding Are Available?
Nomex products are manufactured in different forms to meet the needs of specific equipment.
| Product Type | Typical Application | Main Considerations |
|---|---|---|
| Nomex felt pads | Aluminum profile handling and equipment contact points | Shape, thickness, density, temperature |
| Nomex ironer padding | High-temperature flatwork ironers | Working width, basis weight, thickness, heating method |
| Nomex felt strips | Guide surfaces and selected industrial contact points | Width, length, wear, installation |
| Nomex felt belts | Selected conveying and material-handling systems | Belt dimensions, operating speed, temperature |
| Custom Nomex felt components | Specialized machinery and production equipment | Drawing, operating conditions, material compatibility |
The availability and specifications of each product vary by manufacturer. A felt pad intended for aluminum handling, for example, may have a different construction from padding designed to wrap an industrial ironing roll.
How Do You Choose the Right Nomex Pad or Padding?
Choosing a suitable product starts with the operating requirements rather than the material name alone.
Operating Temperature
Determine the normal operating temperature, peak temperature, and duration of exposure. Continuous exposure can place different demands on a felt component than brief contact with a hot surface.
Thickness and Density
Thickness affects fit, compression, and the contact area. Density and construction influence stiffness, resilience, and durability. These parameters should be selected together according to the equipment’s requirements.
Mechanical Load and Wear
Identify whether the padding experiences repeated compression, sliding friction, tension, or impact. Applications involving continuous movement may require a different construction from stationary protective pads.
Equipment Dimensions
Measure the required width, length, thickness, diameter, or profile. For replacement parts, an existing sample or technical drawing can help define the dimensions and installation requirements.
Material Compatibility
Consider the surface that the felt will contact, along with any exposure to oils, chemicals, moisture, or contaminants. If the application involves a specialized process, confirm compatibility with the manufacturer before specifying the material.
If Nomex does not meet the full set of requirements, another fiber or a blended construction may be more suitable.
FAQs
What are Nomex felt pads used for?
Nomex felt pads are used in selected industrial applications requiring heat-resistant contact surfaces, cushioning, or surface protection. Examples include certain aluminum extrusion handling positions and specialized machinery.
Is Nomex padding suitable for high-temperature applications?
Yes, provided the product is designed for the actual temperature and working conditions. The permitted temperature depends on the felt construction, exposure time, mechanical loading, and manufacturer’s specifications.
What is the difference between Nomex pads and Nomex ironer padding?
Nomex pads are generally shaped components used at specific equipment contact points. Nomex ironer padding is designed to cover heated rolls in industrial flatwork ironers and must meet the requirements of the ironing process.
Can Nomex pads be customized?
Many industrial felt manufacturers offer custom dimensions and shapes. Depending on manufacturing capabilities, thickness, density, construction, and surface treatment may also be specified. Drawings, samples, and operating conditions help define the requirements.
Is Nomex suitable for every industrial felt application?
No. Nomex is useful when its thermal and other material properties match the application. Other materials, including Kevlar, PBO, polyester, or blended constructions, may be more appropriate for different temperatures, loads, or wear conditions.
Conclusion
Nomex pads and padding are used in aluminum handling, industrial laundry, textile processing, and selected machinery applications where heat resistance and suitable contact performance are important. Choosing the right product requires matching its material, construction, dimensions, and operating limits to the equipment rather than relying on the Nomex name alone.
Looking for the right Nomex pads or padding for your industrial application? Contact CALM at [email protected] to discuss your material, dimensions, and performance requirements.