ِDRYER FABRIC
Efficient drying for smoother, stronger, and more stable paper production- Dryer Fabric: Synthetic woven belt used in the dryer section of paper machines.
- Main Function: Carries and presses the paper web against steam-heated dryer cylinders.
- Moisture Removal: Allows moisture to evaporate through its open structure.
- Final Moisture: Reduces sheet moisture from about 50% to 4–6%.
- Sheet Support: Supports the paper during transfers between dryer cylinders.
- Additional Benefits: Helps control shrinkage, smoothness, and machine runnability.
ِDRYER FABRIC
Efficient drying for smoother, stronger, and more stable paper production
- Dryer Fabric: Synthetic woven belt used in the dryer section of paper machines.
- Main Function: Carries and presses the paper web against steam-heated dryer cylinders.
- Moisture Removal: Allows moisture to evaporate through its open structure.
- Final Moisture: Reduces sheet moisture from about 50% to 4–6%.
- Sheet Support: Supports the paper during transfers between dryer cylinders.
- Additional Benefits: Helps control shrinkage, smoothness, and machine runnability.
A dryer fabric (also called dryer screen, dryer clothing, or dryer felt) is a synthetic woven conveyor belt used in the dryer section of a paper machine.
Its main job is to carry the paper web over steam‑heated dryer cylinders, press it gently against the hot surface, and allow moisture to evaporate through its open structure — reducing sheet moisture from ~50% after the press section to the final 4–6% before reel‑up.
It also supports the sheet during transfers between cylinders, controls shrinkage, and contributes to sheet smoothness and runnability.
Construction Features
Base Material
PET is standard for most positions, while PPS is used in high-temperature, hydrolysis-prone conditions.
Weave Structure
Single layer, 1.5 layer, or double layer for strength and stability.
Yarn Profile
Round or flat monofilaments to balance contact area and permeability.
Permeability
Controlled open area for optimal evaporation rate (e.g., 200–1000 CFM depending on grade and speed).
Seam Type
Pin seam, spiral seam, or endless woven for installation and performance needs.
Surface Contact Area
Designed to maximize heat transfer and uniform drying.
Dimensional Stability
Heat set to resist stretching and distortion under high tension.
Key Selection Factors
When choosing a dryer fabric:- Paper Grade – Tissue, fine paper, board, or specialty grades.
- Machine Speed – Higher speeds require more stable, balanced fabrics.
- Dryer Section Configuration – Single‑tier, double‑tier, or combination.
- Operating Temperature & Humidity – Select PET or PPS accordingly.
- Permeability Requirement – Match to evaporation needs and hood air balance.
- Shrinkage Control – Fabric design to match desired sheet shrinkage profile.
- Seam Type – Balance ease of installation with smoothness and strength.
- Contamination Risk – Consider coatings or yarn types that resist pitch/stickies build‑up.
Key Selection Factors
When choosing a dryer fabric:- Paper Grade – Tissue, fine paper, board, or specialty grades.
- Machine Speed – Higher speeds require more stable, balanced fabrics.
- Dryer Section Configuration – Single‑tier, double‑tier, or combination.
- Operating Temperature & Humidity – Select PET or PPS accordingly.
- Permeability Requirement – Match to evaporation needs and hood air balance.
- Shrinkage Control – Fabric design to match desired sheet shrinkage profile.
- Seam Type – Balance ease of installation with smoothness and strength.
- Contamination Risk – Consider coatings or yarn types that resist pitch/stickies build‑up.
Common Types
Single Layer Dryer Fabrics
Economical, good permeability, moderate stability.
1.5 Layer Fabrics
Better sheet support and wear life than single layer
Double Layer Fabrics
High stability, long life, excellent for high speed machines.
Spiral Link Dryer Fabrics
Easy to seam, high permeability, good for packaging grades.
Specialty Coated Fabrics
For anti static, abrasion resistance, or contamination control.
Maintenance & Care
To maximize dryer fabric life and performance:- Regular Cleaning – Use chemical washes, high‑pressure showers, or oscillating showers to prevent plugging.
- Conditioning – Maintain correct tension and alignment to avoid wrinkles and edge wear.
- Inspection – Monitor for seam wear, edge fray, and permeability loss.
- Avoid Over‑Drying – Excessive heat can damage yarns and seams.
- Scheduled Change‑Outs – Replace before loss of permeability or structural integrity affects drying.
- Proper Storage – Store in clean, dry, temperature‑controlled areas; avoid folding.
Maintenance & Care
To maximize dryer fabric life and performance:- Regular Cleaning – Use chemical washes, high‑pressure showers, or oscillating showers to prevent plugging.
- Conditioning – Maintain correct tension and alignment to avoid wrinkles and edge wear.
- Inspection – Monitor for seam wear, edge fray, and permeability loss.
- Avoid Over‑Drying – Excessive heat can damage yarns and seams.
- Scheduled Change‑Outs – Replace before loss of permeability or structural integrity affects drying.
- Proper Storage – Store in clean, dry, temperature‑controlled areas; avoid folding.
Key Parameters to Order
Parameter | Why It Matters | Typical Range / Note |
Machine Position | Determines fabric design | Early, mid, or late dryer section |
Machine Width | Must match machine | mm or m |
Machine Speed | Affects stability & wear | m/min |
Paper Grade | Influences weave & material | Tissue, board, printing |
Material | Heat & hydrolysis resistance | PET, PPS |
Weave/Structure | Balances stability & permeability | Single, 1.5, double layer |
Permeability | Controls evaporation rate | 200–1000 CFM typical |
Caliper (Thickness) | Affects contact & heat transfer | mm |
Seam Type | Installation & performance | Pin, spiral, endless |
Surface Contact Area | Drying uniformity | % contact with cylinder |
Special Treatments | Performance enhancement | Anti‑static, abrasion‑resistant |