In aluminum extrusion lines, aluminum profiles remain at high temperatures after leaving the extrusion press and need to be transferred across cooling tables, rollers, or roller shafts. If the contact surface is unsuitable, the products may be scratched, dented, or affected in terms of surface finish. PBO + Kevlar felt roller sleeves are used to provide a soft, heat-resistant, and wear-resistant contact layer for rollers, helping support and transport aluminum profiles under high-temperature conditions.
What Is a PBO + Kevlar Felt Roller Sleeve?
PBO + Kevlar felt roller sleeves are tubular heat-resistant materials made from a combination of PBO and Kevlar fibers. They are used to cover shafts, rollers, or conveyor rollers in aluminum extrusion lines. The soft felt layer acts as a cushion between the roller and aluminum profile, helping minimize scratches while providing resistance to high temperatures and wear during operation.
PBO improves heat resistance, while Kevlar contributes mechanical strength and wear resistance. The fiber ratio may vary depending on the operating temperature and actual application conditions.
PBO + Kevlar Felt Roller Sleeve Specifications
Product specifications may vary depending on the requirements of each production line. Common specifications include:
| Specification | Reference Value |
|---|---|
| Material | PBO + Kevlar |
| Color | Brown + yellow |
| Thickness | 6, 8, 10, 12 mm |
| Inner diameter | Φ18, Φ23, Φ25, Φ49, Φ50, Φ51, Φ60, Φ62, Φ63, Φ76, Φ80, Φ90, Φ100, Φ114, Φ120 mm... |
| Length | Custom-made |
| Peak temperature | Up to approximately 600°C, depending on the structure |
| Manufacturing process | Needle-punched felt |
| Applications | Rollers, conveyor rollers, and cooling tables in aluminum extrusion lines |
Note: The felt sleeve should not be selected based solely on the maximum temperature rating. Shaft diameter, roller length, actual aluminum profile temperature, contact time, and conveying speed should also be considered when selecting the appropriate material.
Advantages of PBO + Kevlar Felt Roller Sleeves
- High heat resistance: The combination of PBO and Kevlar allows the felt sleeve to operate in high-temperature environments. Some structures can withstand peak temperatures of approximately 550 - 600°C. Actual heat resistance depends on the felt structure, fiber ratio, and exposure time. Compared with Nomex felt roller sleeves, PBO + Kevlar is generally selected for applications with higher heat-resistance requirements.
- Soft surface helps minimize scratches: The felt layer creates a soft contact surface between the roller and aluminum profile, helping reduce the risk of scratches and marks during post-extrusion conveying.
- Good wear resistance: Kevlar contributes to mechanical strength and wear resistance, making the material suitable for rollers operating continuously in aluminum extrusion lines.
- Tubular design for convenient installation: The felt sleeve can be manufactured according to the shaft or roller diameter, making it convenient to replace the existing felt layer without necessarily replacing the entire roller assembly.
- Customizable dimensions: The inner diameter, thickness, and length can be selected according to the roller dimensions and actual operating requirements.
Applications of PBO + Kevlar Felt Roller Sleeves in Aluminum Extrusion
- Cooling table roller covering: Provides a soft contact surface, helps minimize scratches, and supports stable aluminum profile movement across the cooling table.
- Aluminum transfer roller covering: Helps protect aluminum surfaces as profiles pass through transfer points between production stages, particularly for products requiring a high-quality surface finish.
- Extrusion press exit area: Suitable for rollers and conveyor rollers operating at high temperatures, providing both heat resistance and wear resistance during aluminum profile conveying.
Belota Supplies Custom PBO + Kevlar Felt Roller Sleeves
Belota Co., Ltd. supplies PBO + Kevlar felt roller sleeves, roller coverings, and heat-resistant conveyor roller coverings for aluminum extrusion lines. Products can be selected according to the inner diameter, thickness, and length required for the actual roller.
For rollers requiring replacement of the existing felt layer, customers can provide the shaft diameter, roller outer diameter, required covering length, desired felt thickness, and actual photos. BELOTA uses this information to recommend a suitable specification and manufacture the felt sleeve according to the required dimensions.
Information Required When Ordering Felt Sleeves
- Inner diameter or shaft diameter.
- Roller outer diameter, if available.
- Roller length to be covered.
- Desired felt thickness.
- Actual operating temperature.
- Installation position on the production line.
- Required quantity.
- Photos or a sample of the existing felt sleeve.
Frequently Asked Questions
What temperature can PBO + Kevlar felt roller sleeves withstand?
Depending on the structure and PBO/Kevlar ratio, some types can withstand peak temperatures of approximately 600°C. However, continuous operating temperature and peak temperature are two different specifications, so actual operating conditions should be determined before selecting the appropriate material.
Where are PBO + Kevlar felt roller sleeves used?
They are mainly used to cover rollers, shafts, and conveyor rollers on cooling tables in aluminum extrusion lines, particularly in areas with high temperatures and requirements for protecting the aluminum surface.
Can PBO + Kevlar felt sleeves be manufactured according to roller dimensions?
Yes. Felt sleeves can be selected or manufactured according to the required inner diameter, thickness, and length to match the actual roller dimensions.
What is the difference between PBO + Kevlar and Kevlar felt?
PBO provides higher heat resistance than Kevlar, while Kevlar offers good mechanical strength and wear resistance. Combining the two fibers creates a material that provides both heat resistance and mechanical durability for conveying aluminum profiles at high temperatures.
Conclusion
PBO + Kevlar felt roller sleeves are suitable for rollers, conveyor rollers, and cooling tables in aluminum extrusion lines operating under high-temperature conditions. The combination of PBO and Kevlar provides a heat-resistant and wear-resistant covering layer while helping reduce direct contact between the roller and aluminum surface. When selecting the appropriate sleeve, factors such as roller dimensions, actual temperature, contact time, and operating conditions should be considered. Belota supplies and manufactures PBO + Kevlar felt roller sleeves according to required dimensions.
