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Coating Board Paper Making Line: Pulp to Coated Sheet Produc...
Coating Board Production FundamentalsCoating board, also known as coated duplex board or white back board, is a multi-layer paperboard product widely used for packaging of consumer goods, pharmaceuticals, and food products. The production line requires specialized stock preparation for multiple furnish layers: a white top layer (bleached chemical pulp), middle filler layers (recycled fiber or mechanical pulp), and a back layer (unbleached or recycled fiber). Typical basis weights range from 200-450 gsm with production speeds of 150-400 m/min.Multi-Furnish Pulping SystemCoating board production demands separate pulping lines for each layer furnish. The top layer pulper typically processes bleached kraft pulp at 4-5% consistency with 132-250 kW motor power. The filler and back layer pulper handles mixed waste paper and OCC at 200-500 TPD capacity. Each pulping line includes dedicated D-type Hydraulic Pulpers with extraction plates sized for the specific fiber type. Raggers and junkers remove contraries such as baling wire and plastic film at the pulping stage.Layer-Specific Screening and CleaningTop layer stock passes through fine Pressure Screens with 0.12-0.18mm slots to achieve the spotless surface required for coating. Filler layer screening uses 0.20-0.30mm slots, balancing cleanliness with yield. Each layer is processed through dedicated screening and cleaning lines to prevent cross-contamination....
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Cultural Paper Making Line: Advanced Pulp Preparation for Wr...
Cultural Paper Production OverviewCultural paper encompasses writing paper, printing paper, copy paper, and offset paper used in offices, publishing, and educational applications. These grades demand high brightness (typically 85-95% ISO), excellent formation, and precise surface smoothness. The production line must deliver consistent pulp quality with minimal fiber damage, as end-use requirements for opacity, stiffness, and runnability on high-speed printing presses are stringent.Virgin and Recycled Fiber PulpingCultural paper lines use either virgin pulp (bleached hardwood and softwood kraft) or high-grade recycled fiber (sorted office paper, printer waste). The Hydraulic Pulper in this application operates at 3-5% consistency with capacities from 100-400 TPD. For deinked pulp (DIP) production, the pulper is followed by a deinking system incorporating flotation cells and washing stages. Power consumption for pulping averages 15-20 kWh per ton for virgin fiber and 20-30 kWh per ton for recycled fiber requiring deinking.Fine Screening and Centrifugal CleaningPressure Screens with 0.10-0.20mm slot baskets provide fine screening essential for cultural paper grades. The narrow slots remove shives, fiber bundles, and specks that would otherwise appear as defects in the finished sheet. A three-stage screening cascade maximizes fiber recovery while maintaining the cleanliness standard required for high-brightness grades. Centrifugal cleaners operating at 2.0-3.0 bar...
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Kraft Liner Paper Making Line: Complete Equipment Configurat...
Understanding Kraft Liner Board ProductionKraft liner board serves as the outer layer of corrugated packaging, demanding high strength, consistent thickness, and excellent printability. A complete kraft liner production line integrates pulping, screening, refining, and paper machine operations into a continuous workflow. Modern equipment configurations focus on maximizing fiber yield while minimizing energy consumption per ton of finished product.High-Consistency Pulping SystemThe pulping stage begins with the Hydraulic Pulper, designed for processing OCC (Old Corrugated Containers) and mixed waste paper. Key specifications include a capacity range of 200-600 TPD, operating consistency of 4-6%, and power ratings from 132 kW to 500 kW depending on production scale. The D-type pulper design provides efficient defibering with the rotor operating at 150-180 rpm, producing uniform pulp slurry suitable for downstream processing.Multi-Stage Screening and CleaningAfter pulping, the stock passes through a series of Pressure Screens equipped with screen baskets featuring 0.15-0.35mm slot openings. These screens achieve a reject rate below 15% while maintaining fiber recovery rates exceeding 95%. The closed screening system operates at 2.5-3.5 bar differential pressure, effectively removing stickies, plastics, and oversized fiber bundles. High-density cleaners and low-density cleaners complement the screening stage, removing heavy contaminants such as sand, metal fragments, and lightweight plastics.Precision...
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Energy-Efficient Corrugated Paper Production: Cut Power Cost...
Corrugated Paper Production: Process and Equipment Corrugated medium and testliner production from recycled fiber requires efficient stock preparation and forming technology. Modern lines process OCC into high-quality corrugating medium with consistent strength properties. Production Line Configuration Drum Pulper: Continuous operation, 200-500 TPD, pulping consistency 14-18% High-Density Cleaner: 4-stage cascade, heavy contaminant removal Pressure Screen: 0.20-0.35mm slots, 2-stage with secondary fiber recovery Low-Density Cleaner: Forward cleaning at 0.8-1.2% for lightweight contaminants Disc Thickener: Concentrates pulp from 0.8% to 8-12% Paper Machine: 3200-4200mm wire, 70-200 gsm, 400-550 m/min Energy Consumption Stock preparation: 60-100 kWh/ton Paper machine drive: 250-300 kWh/ton Steam: 1.5-1.8 tons/ton paper Total specific energy: 350-460 kWh/ton VFD drives, closed hood heat recovery, and optimized vacuum systems reduce total consumption by 12-18%. Maintenance Schedule Daily: Wire/felt tracking, lubrication, vacuum pump seals, doctor blade contact Weekly: Wire tension, felt condition, steam trap function Monthly: Sensor calibration, refiner plate inspection, screen basket check Quarterly: Doctor blade replacement, press roll cover inspection Annual: Dryer cylinder overhaul, bearing replacement, headbox cleaning Quality Standards for Corrugating Medium CMT: 180-250 N (112 gsm) SCT: 2.0-3.5 kN/m Cobb Value: 30-60 g/m2 (60 sec) Moisture Profile: +/-1.5% Contact us for equipment specifications: leizhanzhang@gmail.com | Zhengzhou Leizhan Technology Paper Machinery...
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Optimizing Multi-Layer Coating Board Forming for Premium Pac...
Coating Board Production Technology Coating board production combines multi-layer forming with precision coating application. The process requires careful control of fiber composition, formation uniformity, and coating formulation to achieve the surface quality demanded by packaging converters. Multi-Layer Forming Configuration Top Liner: Bleached kraft pulp, 25-40 g/m2, high brightness for print surface Middle Layer: Mechanical pulp or deinked pulp, provides bulk and stiffness Back Liner: Unbleached kraft or recycled fiber, 25-40 g/m2 Coating Layers: Pre-coating (10-15 g/m2) + top coating (8-12 g/m2) per side Equipment Specifications Headbox: Multi-layer with 3-4 channels, slice opening 12-18mm Fourdrinier: 25-30m wire length with dewatering elements Press Section: 3-nip, 80-150 kN/m, dryness target 46-48% Dryer Section: 36-48 cylinders, 1800mm, 4-5 steam groups Coating Station: Blade or air knife, 400-800 m/min Calender: 2-4 nips, heated rolls for surface finish Energy Data Steam: 1.8-2.2 tons/ton paper Electric power: 350-450 kWh/ton Coating drying: 30-40% of total energy Maintenance Intervals Daily: Doctor blade contact check, coating blade inspection, dryer surface monitoring Weekly: Wire/felt tracking, steam trap verification, coating preparation system cleaning Monthly: Coating blade replacement (or when streaks appear), calender roll surface inspection Quarterly: Full dryer inspection, press roll cover check, coating circulation system flush Contact us for coating board...
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Advanced Deinking Technology for Premium Cultural Paper Prod...
Cultural Paper Production: Deinking and Refining Technology Premium cultural paper production requires advanced deinking systems and precise refining control. Writing paper, copy paper, and offset grades demand high brightness, uniform formation, and controlled surface properties. Deinking System Equipment High-Consistency Pulper: 14-18%, 40-50°C, chemical dosing for ink detachment Coarse Screening: 2.0-3.0mm holes for large contaminant removal Fine Screening: 0.15-0.25mm slots for small particles Flotation Deinking: Multi-stage cells, 0.8-1.2% consistency, 85-95% ink removal Dispersion: 80-95°C, 25-30% consistency for residual ink particle reduction Post-Flotation: 0.8-1.0% for final specks removal Disc Thickener: Concentrates to 8-12% before machine chest Refining Parameters by Grade Copy Paper (70-80 gsm): Target 35-40 °SR, SEL 1.0-1.5 J/m Offset (60-100 gsm): Target 38-45 °SR, SEL 1.2-1.8 J/m Writing/Bond (80-120 gsm): Target 40-48 °SR, SEL 1.5-2.0 J/m Energy Consumption Deinking system: 200-300 kWh/ton (flotation + dispersion + cleaning) Refining: 80-180 kWh/ton for 30-45 °SR increase Paper machine: 280-350 kWh/ton Maintenance Schedule Daily: Check flotation cell air flow, verify chemical dosing rates, monitor brightness Weekly: Inspect screen baskets, check refiner plate gap, verify disc thickener filtrate clarity Monthly: Calibrate brightness meter, check disperser disc wear, clean flotation cells Quarterly: Refiner plate inspection, screen basket replacement if slots widened >15% Contact us for...