A spiral dryer fabric (also called spiral dryer screen or spiral dryer mesh) is a seamless paper machine clothing for the dryer section, built from interlocked polyester monofilament spiral loops connected by pin yarns. The seamless construction eliminates conventional seams — preventing mark-sensitive paper damage and delivering superior seam strength equal to the fabric body.
Description
PFM Screen Spiral Dryer Fabrics are seamless paper machine clothing built for the dryer section from interlocked polyester monofilament spiral loops joined by pin yarns. The seamless structure means the connection point carries the same tensile strength as the fabric body — no conventional woven seam that could wear early or mark the paper web. Air permeability ranges from 150 to 900 CFM across nine standard models. Materials available are 100% PET (hydrolysis-resistant, standard grade) and 100% PPS (polyphenylene sulfide, for high-steam positions up to 250°C). Both round yarn and flat yarn configurations are available to match machine speed and paper grade requirements.
150–900 CFM Air Permeability Range | 250°C Max Temp — PPS Grade | 30+ Years Manufacturing Experience |
 Round Yarn Spiral Dryer Fabric ● Classic circular monofilament cross-section ● Higher open area — maximum air ventilation ● Suitable for standard-to-medium speed machines ● Ideal for kraft, board, corrugated and bag paper ● Easy to clean; straightforward pin-yarn seam ● Standard choice for most paper machine positions |  Flat Yarn Spiral Dryer Fabric — Recommended for High Speed ● Smooth flat surface — larger paper contact area ● Better wear resistance on high-speed positions ● Improved sheet stability and drying performance ● Recommended for machines >600 m/min ● Superior dimensional stability under high tension ● Preferred for mark-sensitive and specialty grades |
| Feature | Spiral Dryer Fabric | Woven Dryer Fabric |
| Construction | Interlocked spiral loops + pin yarn | Woven warp & weft monofilament yarns |
| Seam type | Spiral seam = same strength as fabric body | Spiral ring or pin seam join |
| Air permeability | 150–900 CFM (high, adjustable) | 100–750 CFM (precisely controlled) |
| Paper marking | No seam marks on paper web | Minimal — depends on weave pattern |
| High-temp option | Full PPS fabric (up to 250°C) | PPS edge reinforcement |
| Cleaning ease | Excellent — open spirals shed debris easily | Good — depends on CFM and weave density |
| Best for | High permeability; mark-sensitive grades | Controlled CFM; heavier paper grades |
Get a Custom Spiral Dryer Fabric Quote in 24 Hours No fixed MOQ. Custom width, length & loop size. PET or PPS. Engineered to your machine position and paper grade. Factory-direct price from a 30-year specialist. WhatsApp: +86 153 6967 9157Email: polyestermesh@pfmscreen.com |
Feature
PFM Screen spiral dryer fabrics are engineered to maximize drying efficiency, extend fabric life, and reduce downtime in the paper machine dryer section. Six defining performance properties distinguish them from conventional woven dryer fabrics.
01 Broad Air Permeability — 150 to 900 CFM Nine standard spiral loop sizes (small, medium, large) span permeability from 150 to 900 CFM at 127 Pa, giving precise airflow control for each dryer position and paper grade. Permeability stays stable throughout service life due to the rigid spiral structure. | 02 Seamless Design — No Seam Marks on Paper The spiral seam is formed from the same monofilament as the fabric body — equal tensile strength, zero weak point. No conventional woven seam that could cause early wear or mark the paper web, critical for tissue, specialty, and mark-sensitive grades. | |
03 PET & PPS — Standard and High-Temperature Grades Standard PET resists hydrolysis in normal dryer conditions (up to ≈150°C). PPS (polyphenylene sulfide) is available as a full-fabric option for early dryer groups with high-pressure steam — immune to hydrolysis, retaining full strength at 250°C continuous. Models: PPS9090B and PPS9090C. | 04 Superior Diagonal Stability The spiral structure delivers high bias (diagonal) stability, ensuring even tension distribution across the full fabric width. This prevents tracking problems, reduces roll wear, and extends service life compared to some woven fabrics that skew or track off-centre over time. | |
05 Easy to Install, Fit and Clean Installed on-machine using a pin yarn and leader cloth — no special tools required. The open spiral loops resist fibre contamination and self-clean effectively during operation, reducing shower water demand and maintaining permeability throughout service life. | 06 Faster Drying Rate & Energy Savings Maximum air permeability enables more effective heat transfer from the dryer cylinders to the paper web — allowing higher machine speeds, shorter time in the dryer section, and measurable reductions in steam consumption per tonne of paper produced. | |
Why choose PPS monofilament? PPS (polyphenylene sulfide) monofilament is available for machine positions where high-pressure steam would cause standard PET to hydrolyze and fail prematurely. PPS's chemical backbone — repeating para-phenylene units linked by sulfide bonds — is completely immune to hydrolysis. PPS retains full mechanical integrity at continuous operating temperatures up to 250°C. Choose PPS when your current PET fabrics fail prematurely in early dryer positions due to high-steam exposure. PFM Screen PPS spiral dryer fabric models: PPS9090B and PPS9090C (see Specifications tab for full details). |
Tell Us Your Machine Specs — We'll Recommend the Right Model Share machine speed, paper grade, dryer position, and current fabric life. Our engineers will recommend the right spiral dryer fabric and send a custom quote within 24 hours. WhatsApp: +86 153 6967 9157Email: polyestermesh@pfmscreen.com |
Application
PFM Screen spiral dryer fabrics are used globally in paper machine dryer sections and across multiple other industrial drying and conveying applications. In a paper machine, the dryer section evaporates remaining moisture from the paper web after the press section — the dryer fabric carries the web around steam-heated cylinders, maintaining contact and uniform pressure through the complete drying process.
 Spiral Dryer Fabric — Paper Machine Dryer Section |  Spiral Dryer Belt — Tea & Food Drying |
PFM Screen spiral dryer fabrics are principally designed for multi-cylinder fourdrinier paper machines and multi-cylinder cylinder machines. The paper web travels around large-diameter steam-heated cylinders (130–180°C), with the dryer fabric pressing the web against the cylinder surface for efficient heat transfer and moisture evaporation. The spiral structure's open architecture maximizes steam contact and removes evaporated moisture quickly — while the seamless design prevents marking common in woven dryer fabrics at high-wear positions.
| Paper Grade | Machine Type | Recommended Spiral Type | CFM Range |
| Kraft / bag paper | Fourdrinier | Large loop, round yarn | 600–900 |
| Corrugated / board paper | Fourdrinier / cylinder | Medium or large loop | 400–800 |
| Thick board / pulp board | Cylinder machine | Large loop, round yarn | 600–900 |
| Tissue paper | Tissue machine | Medium loop, flat yarn | 300–700 |
| High-speed machines >600 m/min | Any type | Flat yarn recommended | 300–700 |
| High-steam early dryer groups | Any type | PPS grade (up to 250°C) | 400–700 |
| Specialty / mark-sensitive | Any type | Flat yarn, small or medium loop | 150–400 |
Food Drying Tea leaf drying, agricultural product drying, and oven conveyor belts in food processing lines. The open spiral structure promotes even airflow through the product for uniform, gentle drying without product damage. | Nonwoven Conveying Through-air bonding (TAB) and hot-air bonding (HAB) nonwoven production lines. The spiral belt supports and conveys the nonwoven web through the bonding oven with controlled airflow for consistent bonding across the web width. |
Printing & Textile Drying Conveyor belts for rotary screen printing machines in the printing and dyeing industry; textile dryer conveyor belts for post-dye heat-setting lines. The flat yarn version provides a smoother surface that minimises print distortion. | Coal Washing & Industrial Filtration Spiral dryer fabric serves as a special filter fabric on vacuum washers and horizontal belt washers in coal washing plants. Also deployed in pharmaceutical, rubber, and other industrial processes requiring an open, cleanable conveyor screen belt. |
Find the Right Spiral Dryer Fabric for Your Machine & Paper Grade Share machine speed, dryer position, paper grade and current fabric service life. Our engineers will recommend the right model and provide a custom quote within 24 hours. No fixed MOQ. WhatsApp: +86 153 6967 9157Email: polyestermesh@pfmscreen.com |
Specifications
PFM Screen supplies spiral dryer fabrics in two material grades: 100% PET (hydrolysis-resistant polyester, standard grade) and 100% PPS (polyphenylene sulfide, for high-temperature high-steam positions up to 250°C). Both materials are available in round yarn and flat yarn configurations. All models are manufactured to custom dimensions — no fixed MOQ.
| Type / Model | Loop Width (mm) | Warp Dia. (mm) | Weft Dia. (mm) | Tensile (N/cm) | Weight (kg/m²) | Thickness (mm) | Air Perm. (m³/m²h) | CFM (127 Pa) |
| Small Loop 5080A | 5.2 | 0.5 | 0.9 | 1800 | 1.0 | 2.1 | 15000 | 9375 |
| Medium Loop 6890A | 8.0 | 0.68 | 0.9 | 2000 | 1.31 | 2.45 | 18000 | 11250 |
| Medium Loop 6890B | 7.15 | 0.68 | 0.9 | 2000 | 1.4 | 2.45 | 16000 | 10000 |
| Medium Loop 9090A | 8.0 | 0.9 | 0.9 | 2300 | 1.8 | 3.03 | 19000 | 11875 |
| ★ PPS9090B — 250°C | 6.48 | 0.9 | 0.9 | 2000 | 1.9 | 3.3 | 14000 | 8750 |
| ★ PPS9090C — 250°C | 8.3 | 0.9 | 0.9 | 2000 | 1.74 | 3.5 | 19000 | 11875 |
| Large Loop 90110A | 10.0 | 0.9 | 1.1 | 2300 | 1.65 | 3.15 | 20000 | 12500 |
| Large Loop 10090A | 8.0 | 1.0 | 0.9 | 2000 | 2.0 | 3.6 | 17000 | 10625 |
| Large Loop 120130A | 12.0 | 1.2 | 1.3 | 2600 | 2.35 | 4.3 | 22000 | 13750 |
★ PPS models use polyphenylene sulfide monofilament — rated for continuous operation at 250°C, immune to hydrolysis. All other models are 100% hydrolysis-resistant PET.
Q1: What is a spiral dryer fabric and how does it differ from a woven dryer fabric? A spiral dryer fabric is built from interlocked polyester monofilament spiral loops, each joined to the next by a pin yarn — creating a seamless, endless belt with no conventional woven seam. The connection point carries the same tensile strength as the fabric body. A woven dryer fabric uses interlaced warp and weft yarns. Key differences: spiral fabrics offer higher maximum air permeability (150–900 CFM vs. 100–750 CFM for woven), no seam marks on the paper web, and excellent self-cleaning. Woven fabrics offer more precisely controlled permeability and better structured support for heavier paper grades. |
Q2: What air permeability range is available in PFM Screen spiral dryer fabrics? PFM Screen spiral dryer fabrics cover a permeability range from 150 CFM (small loop 5080A, 15,000 m³/m²h) to approximately 900 CFM (large loop 120130A, 22,000 m³/m²h) at 127 Pa test pressure. Nine standard models span this range. The right permeability depends on paper grade, basis weight, machine speed, and dryer section position. Contact us with your machine parameters for a recommendation. |
Q3: When should I choose flat yarn instead of round yarn spiral dryer fabric? Round yarn is the standard choice for most paper machine positions — good airflow, easy cleaning, reliable service up to around 600 m/min. Flat yarn spiral dryer fabric is recommended for high-speed machines (above 600 m/min), mark-sensitive paper grades, and positions where maximum paper-contact area is needed. The flat surface reduces sheet flutter, provides better dimensional stability under high tension, and improves wear resistance on high-speed runs. |
Q4: What is PPS spiral dryer fabric and when do I need it? PPS (polyphenylene sulfide) spiral dryer fabric uses monofilaments made from PPS resin rather than standard PET. PPS is completely resistant to hydrolysis — the dominant failure mode in early dryer groups where high-pressure steam is used. Standard PET degrades via water cleavage at high temperatures; PPS's chemical backbone is immune to this mechanism and retains full mechanical strength at continuous operating temperatures up to 250°C. Choose PPS (models PPS9090B or PPS9090C) when your PET fabrics fail prematurely in early dryer positions due to high-steam exposure. |
Q5: Which paper grades and machine types are suitable for spiral dryer fabrics? PFM Screen spiral dryer fabrics cover a wide range: kraft paper, bag paper, corrugated paper, board paper, thick board, pulp board, linoleum base paper, train ticket paper, wrapping paper, and tissue. Designed for multi-cylinder fourdrinier machines and multi-cylinder cylinder machines. PPS models serve early high-steam dryer groups on any machine type. Contact us with machine speed (m/min), paper grade, basis weight (g/m²), and dryer position for a precise recommendation. |
Q6: How is a spiral dryer fabric installed on the paper machine? Spiral dryer fabrics are delivered open-ended with a connecting seam of the same spiral construction. Installation uses a leader cloth to guide the fabric onto the machine. The two ends are joined by threading a pin yarn through the aligned spiral loops — the wire must not be cut and both ends must be tucked back into the seam to prevent movement. No special rigging or crane tools are required in most cases. Each PFM Screen spiral dryer fabric is supplied with matching leader cloth and connecting wire. |
Q7: Can PFM Screen manufacture custom widths and lengths? Yes. Every PFM Screen spiral dryer fabric is manufactured to your exact machine specifications — custom width, circumference, and loop size. No fixed minimum order quantity; single-piece custom orders are accepted. To get a quote, provide: machine width, dryer roll diameter, number of dryer cylinders in the section, and your current model specification. Typical lead time is 2–4 weeks from order confirmation. |
Q8: Can spiral dryer fabric be used for food drying, tea drying or nonwoven conveying? Yes. PFM Screen spiral dryer fabrics are widely deployed beyond papermaking: food drying (tea, agricultural products, oven conveyor belts), nonwoven through-air bonding and hot-air bonding production lines, printed textile dryer belts, coal washing horizontal belt washers, vacuum washer filter belts, and rotary screen printing machine conveyors. The open spiral construction is ideal wherever even airflow and gentle product handling are required. |
Order Spiral Dryer Fabric — Custom Quote in 24 Hours No fixed MOQ · Custom dimensions · PET or PPS · Round or flat yarn · 30+ years paper machine clothing experience. Tell us your machine and paper grade — we'll recommend the right model and reply within 24 hours. WhatsApp: +86 153 6967 9157Email: polyestermesh@pfmscreen.com |
