Testliner machines produce the printable outer surface of corrugated board at 500–1,000 m/min and 150–180°C. Multi-ply construction — typically 2 or 3 plies with different fiber compositions per ply — creates unique drying challenges. Uneven cross-direction (CD) moisture profile causes sheet warp on the corrugator, leading to customer rejects. Fabric marking on the top ply compromises surface smoothness for flexo pre-print and post-print quality. Inconsistent drying between plies weakens short-span compression (SCT) strength, the primary performance metric for containerboard. Standard dryer fabrics cannot deliver the moisture profile uniformity, surface finish, and ply-to-ply drying consistency that testliner production demands.
Testliner machines produce the printable outer surface of corrugated board at 500–1,000 m/min and 150–180°C. Multi-ply construction — typically 2 or 3 plies with different fiber compositions per ply — creates unique drying challenges. Uneven cross-direction (CD) moisture profile causes sheet warp on the corrugator, leading to customer rejects. Fabric marking on the top ply compromises surface smoothness for flexo pre-print and post-print quality. Inconsistent drying between plies weakens short-span compression (SCT) strength, the primary performance metric for containerboard. Standard dryer fabrics cannot deliver the moisture profile uniformity, surface finish, and ply-to-ply drying consistency that testliner production demands.
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 guidancePAPTEX Polyester Dryer Fabric — Flat Yarn Series (PAPTEX-FY-4500) is engineered specifically for testliner machine conditions. The precision flat yarn weave with optimized air permeability (350–550 CFM for the 100–200 g/m² testliner basis weight range) ensures uniform CD moisture evacuation — critical for warp-free corrugator performance. An ultra-smooth fabric surface finish preserves the printable top-ply surface for flexo pre-print and post-print quality, eliminating fabric-marking defects. Custom caliper tolerance (±0.05 mm) delivers consistent heat transfer across all plies, protecting SCT strength development in every layer. Each fabric is custom-manufactured to your machine dimensions — no stock-fabric compromise.
Uniform CD moisture profile — ±1.5% moisture variation target reduces corrugator warp defects by up to 40%
Smooth surface finish preserves printability — no fabric marking on flexo pre-print or post-print top-ply surfaces
Consistent multi-ply drying — ±0.05 mm caliper tolerance ensures even heat transfer across 2-ply and 3-ply constructions
Optimized 350–550 CFM air permeability — calculated for your specific 100–200 g/m² testliner basis weight range
Pin seam with ≥85% strength retention — fast installation, minimal production downtime
100% Polyester (PET) Monofilament
400 – 1,200 m/min
6 – 14 months (varies by paper grade and operating conditions)
12 – 400 g/m²
Core parameters for Polyester Dryer Fabric. See the product decision page for complete specifications.
| Material | 100% Polyester (PET) Monofilament |
| Construction | Flat yarn, multi-shed weave |
| Air Permeability | 350 – 650 CFM (at 125 Pa, ISO 9237) |
| Continuous Operating Temperature | Up to 180°C |
| Peak Temperature | 200°C (≤ 15 minutes) |
| Tensile Strength (Warp) | ≥ 80 kN/m |
| Tensile Strength (Weft) | ≥ 45 kN/m |
| Elongation at Break (Warp) | ≤ 2.5% at 80 kN/m |
Compatible Machine Brands
Compared to standard polyester dryer fabrics, PAPTEX Flat Yarn Series provides ±0.05 mm caliper tolerance (industry typical ±0.10 mm), surface finish specifically optimized for printable containerboard grades, and factory-direct pricing with no distributor margin. For testliner machines — where CD moisture uniformity directly determines corrugator warp rates and surface smoothness determines flexo print quality — this translates to measurable ROI in reduced customer claims and higher-grade production output. Unlike kraftliner fabrics optimized for high-basis-weight strength grades, PAPTEX testliner fabrics prioritize surface quality and moisture uniformity for the printable packaging market.
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Send us your testliner machine parameters — basis weight range, number of plies, print method (pre-print or post-print), and machine width. Our application engineer responds within 24 hours with a dryer fabric recommendation: CFM calculation matched to your basis weight range, surface finish specification for your print method, seam selection, and competitive quotation.