White top liner machines produce high-graphic packaging board where the thin bleached top ply — only 15–25% of total basis weight — must achieve ISO brightness 76–84. Any fabric mark, contamination transfer, or shade variation on this delicate white surface results in immediate customer rejection: the entire reel is downgraded. Standard dryer fabrics with surface irregularities, inconsistent permeability, or contamination carryover create visible defects that destroy print registration quality for flexo and offset applications. Mills producing white top liner need dryer fabrics engineered specifically for zero-mark, high-cleanliness operation on the white ply side.
White top liner machines produce high-graphic packaging board where the thin bleached top ply — only 15–25% of total basis weight — must achieve ISO brightness 76–84. Any fabric mark, contamination transfer, or shade variation on this delicate white surface results in immediate customer rejection: the entire reel is downgraded. Standard dryer fabrics with surface irregularities, inconsistent permeability, or contamination carryover create visible defects that destroy print registration quality for flexo and offset applications. Mills producing white top liner need dryer fabrics engineered specifically for zero-mark, high-cleanliness operation on the white ply side.
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 is engineered to protect the white top ply throughout the dryer section. The ultra-smooth flat yarn surface eliminates fabric marking on the thin, delicate bleached top layer. Precision-controlled air permeability (350–550 CFM) ensures uniform CD moisture profile, critical for consistent flexo and offset print registration across the full reel width. An optional PTFE coating provides maximum contamination resistance — preventing color transfer, stickies deposition, and brightness degradation from the recycled base ply. Each fabric is custom-manufactured to your machine dimensions, with rigorous surface inspection to guarantee zero-defect white surface contact.
Zero-mark flat yarn surface protects the thin white top ply (15–25% of basis weight) from fabric impression and surface defects
PTFE non-stick coating prevents contamination transfer from the recycled base ply — no brightness loss, no color streaking on the white printing surface
±0.05 mm caliper tolerance with uniform CD permeability ensures consistent moisture profile for high-registration flexo and offset printing
100% virgin PET monofilament — no recycled content that could leach colorants onto the white ply at 140–170°C drying temperatures
Custom-engineered to your machine dimensions with pin seam ≥85% strength retention for fast installation and minimal sheet contact disruption
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 delivers the surface smoothness and contamination resistance essential for white top liner production. Standard fabrics with ±0.10 mm caliper variation and untreated surfaces risk marking the delicate white ply and transferring contaminants that degrade ISO brightness. PAPTEX achieves ±0.05 mm caliper tolerance, optional PTFE contamination barrier, and 20+ QC inspection points per fabric — including dedicated surface inspection for white-top applications. For mills where a single brightness defect can reject an entire reel, this difference determines whether output grades as premium or gets returned by the customer.
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Send us your white top machine parameters — basis weight range, machine speed, and brightness specification. Our application engineer responds within 24 hours with a dryer fabric recommendation: surface analysis for zero-mark performance, CFM calculation for uniform CD drying, PTFE coating assessment, and competitive quotation.