The Role of Dryer Fabrics in the Paper Machine

In the dryer section, the paper sheet travels around large-diameter heated cylinders where the remaining water is removed by evaporation. Dryer fabrics hold the sheet in close contact with the cylinders, manage air movement, and control sheet shrinkage while preventing cockles. The dryer section is the most energy-intensive part of the papermaking process, consuming approximately two-thirds of the total energy consumption. An optimized Dryer fabric is therefore essential for energy efficiency, sheet quality, and machine productivity.

Key Design Requirements for an Optimal Dryer Fabric

A premium dryer fabric must be engineered to meet the following critical design criteria:

A. Thermal Stability & Heat Resistance

· Must withstand high-temperature environments without degradation

· Materials such as hydrolysis-resistant monofilaments and PPS yarns ensure performance under extreme thermal conditions

B. Optimal Sheet Contact & Heat Transfer

· High contact area on the paper side ensures maximum heat transfer from the cylinder to the sheet

· Flat monofilaments and specialized weave constructions provide homogeneous, even surfaces for optimal sheet contact

C. Balanced Permeability & Evaporation Channels

· Open roll-side structure encourages optimal moisture removal and prevents formation of insulating “steam cushions”

· Even distribution of open areas ensures uniform CD moisture profile across the fabric width

D. Dimensional Stability & Low Elongation

· Good diagonal stability prevents distortion-free running and maintains consistent air permeability

· Low extensibility allows permanent high tension operation without lengthening or width loss

E. Abrasion & Wear Resistance

· Good wear resistance prevents fabric or seam ruptures and improves machine running performance potentials

· High wear volume extends fabric running life

F. Contamination Resistance & Cleanability

· Special designed yarn structures or coating improves anti-contamination performance

· Structures with less contacting area and no hidden room where contamination can become trapped

· Low internal void volume to prevent stickies and dirt accumulation

G. Fast Seaming Technology

· Smooth seam concepts for fast, safe installation and indistinguishable seam performance

· Twist-free and protected seams maximize fabric life and reduce machine shutdowns

Paper Machine Running Issues Addressed

Customer Benefits

A. Energy Efficiency & Cost Savings

· Reduced steam consumption through optimized heat transfer and evaporation

· Lower drive loads and improved drying efficiency

B. Enhanced Sheet Quality

· Uniform drying profiles with consistent CD moisture distribution

· Mark-free sheet surface with better quality

C. Extended Fabric Life

· Hydrolysis-resistant and abrasion-resistant designs extend service life significantly

· Anti-contamination designs maintain permeability throughout fabric life

D. Increased Machine Productivity

· Fewer sheet breaks and reduced machine shutdowns

· Fast, safe seaming reduces downtime

E. Cleaner Operation

· Low void volume and open structures prevent contaminant buildup and less sheet defects

· Easy cleaning and maintained permeability over entire service life

Summary

An optimally designed dryer fabric delivers energy efficiency through maximized heat transfer and evaporation, extended service life through hydrolysis and abrasion resistance, superior sheet quality through uniform drying profiles and mark-free surfaces, reduced downtime through advanced seam technology, and cleaner operation through contamination-resistant designs. The result is a dryer fabric that not only solves critical paper machine running issues but also delivers measurable improvements in productivity, quality, and total cost of ownership.