Improve Fiber Retention in the Forming Section
First-pass retention is established in the forming section. A useful review starts with the furnish, retention chemistry, headbox consistency, drainage and vacuum profile, white-water data, forming fabric condition and recent operating changes. These inputs help separate a fabric condition from a process or chemistry issue before a specification is changed.
The Challenge You're Facing
First-pass retention is established in the forming section. A useful review starts with the furnish, retention chemistry, headbox consistency, drainage and vacuum profile, white-water data, forming fabric condition and recent operating changes. These inputs help separate a fabric condition from a process or chemistry issue before a specification is changed.
Hidden Costs
Downtime, energy waste, and sheet defects from suboptimal fabricsEfficiency Loss
Generic solutions don't match your specific operating conditionsDecision Delay
Procurement cycles stretch without engineering-grade selection guidanceForming Fabric — Multi-Layer Series — Engineered for Your Application
A forming-section retention review compares the current forming fabric construction and condition with the machine position, furnish and measured wet-end data. Record the current fabric design, running time, wear or contamination pattern, drainage behaviour, vacuum settings, white-water consistency and chemical changes. Use the combined evidence to decide whether maintenance, process correction, chemistry review or a different forming fabric specification should be evaluated.
Key Benefits
Create one baseline for retention, white-water consistency and forming-section conditions
Separate forming fabric condition from furnish, chemistry, drainage and vacuum factors
Compare wear, contamination and drainage observations before changing a fabric specification
Document the exact forming position, current construction and measured operating data
Evaluate one corrective action at a time and compare it with the same baseline
PET (Warp) + PA6 (Weft) Monofilament
200 – 2,200 m/min
3 – 18 months (varies significantly by paper grade, speed, and filler content)
12 – 500 g/m²
Key Technical Specifications
Core parameters for Forming Fabric — Multi-Layer Series. See the product decision page for complete specifications.
| Material | Warp: 100% Polyester (PET) Monofilament. Weft: Polyamide (PA6) or PET (grade-dependent). Hybrid warp/weft configurations available. |
| Construction | Single-Layer (SSB) / Double-Layer / Triple-Layer. Surface weave: Plain / Twill / Satin. Selection depends on paper grade and machine type. |
| Mesh Count (Warp) | 20 – 80 threads/cm (grade-dependent) |
| Mesh Count (Weft) | 16 – 64 threads/cm (grade-dependent) |
| Yarn Diameter (Warp) | 0.08 – 0.30 mm (matched to mesh count and paper grade) |
| Yarn Diameter (Weft) | 0.10 – 0.35 mm (PA6 weft for wear resistance in wet conditions) |
| Air Permeability | 200 – 700 CFM (at 125 Pa, ISO 9237) |
| Open Area | 12 – 28% (weave-dependent) |
Compatible Machine Brands
Why PAPTEX
Do not select a forming fabric from a retention target alone. Compare the current and proposed construction for the documented machine position, paper grade, furnish, drainage elements, vacuum profile and operating limits. No fabric specification can guarantee a retention result when chemistry, stock preparation or machine conditions are changing at the same time.
Baseline First
Record retention, white-water and forming-section conditions before discussing a specification change.Position Specific
Connect fabric construction and condition to the actual forming position, furnish and drainage conditions.Separate Root Causes
Review fabric, chemistry, stock preparation, vacuum and operating changes as separate factors.Evidence Before Recommendation
Define the next technical review from documented machine data and observations.Common Questions About This Solution
Engineering answers to the most common pre-purchase questions
Didn't find your question? Ask an engineer directly.
Ask an EngineerRequest a Forming-Section Retention Review
Send the paper grade, furnish, current retention and white-water data, forming fabric details, drainage and vacuum observations, and recent chemistry or operating changes for a condition-led technical review.