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VIEW PRODUCTSCorrugator Belts for Double Facers: Technical Specifications and Maintenance Guide
Jun 18,2026
The corrugator belt used on the double facer in corrugated cardboard production is far more than a simple transport mechanism. It is an engineered component that simultaneously performs multiple critical functions—conveying, pressure distribution, heat transfer, and moisture management—all of which collectively determine the structural quality and dimensional stability of the finished board.
Application and Functional Integration for Corrugator Belt
Installed directly above the heating section of the double facer, the corrugator belt forms a continuous interface with the hot plates and the product being processed. As the single-faced corrugated board, having been coated with adhesive, enters the hot plate zone in combination with the outer liner, the belt applies a uniformly distributed pressure across the entire board width. This pressure is essential for the proper activation and setting of the starch-based adhesive. In parallel, the belt's open construction permits the escape of water vapor generated by the high-temperature curing process, preventing moisture-related defects such as blistering or warping. The belt also participates in the drying cycle by absorbing excess moisture and releasing it during the return run, thereby contributing to a stable and efficient drying environment.
Material for Corrugator Belt
The operational properties of the corrugator belt are largely determined by its material composition. Two principal types are commonly specified for double facer applications:
- Woven Cotton Corrugator Belt: These are manufactured by weaving a combination of cotton yarns and synthetic filaments. The cotton component is valued for its natural hygroscopicity, enabling effective moisture adsorption and release. The synthetic fibers contribute to overall tensile strength and resistance to mechanical wear. For applications with elevated heat exposure, Kevlar reinforcement may be added to the belt edges to prevent thermal damage and edge fraying.
- Needle-Punched PET Corrugator Belts: Produced via the needle-punching process using non-woven polyester fibers, these belts offer excellent dimensional stability and resistance to high temperatures. The non-woven structure provides a uniform pore distribution, supporting consistent air permeability across the entire belt surface. Premium variants incorporate Nomex fiber edge treatments to enhance durability in contact with hot plate edges.
Technical Specifications for Corrugator Belt
To ensure reliable operation and consistent board quality, corrugator belts must meet the technical requirements outlined in industry standard BB/T 0022-2017. Key parameters include:
Air Permeability: This is the most important functional parameter. Under a pressure differential of 0.735 kPa, the minimum required air permeability is 0.9 × 10² cm³/(cm²·min·kPa) . Permeability below this threshold can lead to steam entrapment and subsequent bonding defects.
Tensile Strength and Elongation Control: The belt must demonstrate a warp tensile strength of ≥200 N/mm and a weft tensile strength of ≥100 N/mm. Warp elongation must be maintained within the range of -0.8% to 0.5% to prevent tension loss and associated tracking problems.
Thermal Resistance: The belt must withstand hot plate temperatures of 180°C–200°C. Huatao standard belts are rated to 220°C, while belts with Kevlar edge reinforcement offer extended thermal capability up to 350°C.
Seam Quality: The belt surface must be free from irregularities that could transfer to the cardboard. Seam thickness variation is limited to ≤±0.5 mm, with hot-pressed flocked seams and rubber-filled seams being common industry practices; custom seam configurations are available upon request.
Huatao Corrugator Belt Specifications
Width: 1600 mm – 3300 mm
Maximum Operating Speed: 450 m/min
Thickness: 8.5 mm – 10 mm
Maintenance and Operational Guidelines for Corrugator Belt
- Break-in Period: Upon initial installation, the belt should be run at low speed (20–30 m/min) under heat for a minimum of 30 minutes. This conditioning step stabilizes the fabric structure and minimizes the risk of early slippage.
- Shutdown Lifting: During any production interruption, the belt must be raised from the hot plates. Continuous contact with heated surfaces during stoppages can cause localized thermal degradation, leading to cracking, scorching, or irreversible damage.
- Cleaning Methods: For woven cotton belts, mechanical cleaning using brushes or scrapers is permissible for removing adhesive residue. However, needle-punched belts are more susceptible to surface damage and must be cleaned using soft-bristle tools only—stiff brushes and scraping are expressly forbidden to prevent fiber loss and delamination.
- Tracking and Edge Maintenance: Minor edge fraying should be repaired immediately using high-temperature adhesive. For persistent misalignment issues, the installation of an automatic tracking system is recommended to prevent edge damage and maintain consistent belt positioning.
Selection Criteria
When evaluating corrugator belt options, it is advisable to select products that offer high air permeability, effective moisture absorption, and integrated anti-static properties. Anti-static treatment helps to reduce dust accumulation and minimizes base paper slippage caused by electrostatic charges—both of which contribute to improved production consistency and board quality.
For product information or technical assistance, please contact HUATAO.
Email: team3@huataogroup.com
WhatsApp/WeChat: +86 13331385676
Website: www.huataogroup.com
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