Cost-Effective Coating Kitchen Design for Paperboard Production
Coating Kitchen Design for Cost-Effective Paperboard Production
The coating kitchen is the heart of any coated board production line. A well-designed coating preparation system ensures consistent coating color quality, minimizes waste, and controls one of the largest variable costs in paperboard manufacturing. For mills producing 200-400 TPD of coated board, coating kitchen efficiency directly impacts annual chemical costs by 00,000 to ,200,000.
Technical Specifications: Leizhan Coating Board Line Components
- Multi-Layer Headbox: 3-4 layer stratified jet, basis weight range 180-450 gsm, CD profile variation <1.5%
- Coating Kitchen: Automated batch preparation, 3-5 coating formulations, solids content control +/- 0.5%
- Blade/Rod Coater: Coat weight 8-25 gsm per side, speed up to 600 m/min, blade angle 15-45 degrees
- Air Dryer / IR Dryer: Non-contact drying, 70-90% evaporation efficiency, web temperature 70-85 C
- Soft Calender: 2-4 nips, linear load 80-250 kN/m, temperature 120-180 C, gloss target 45-65%
- Reel: 2,500-3,600mm width, parent reel diameter up to 2,800mm, tension control +/- 2%
Coating Formulation and Cost Control
Typical pre-coat formulation: coarse ground calcium carbonate (GCC) 100 parts, styrene-butadiene latex 8-12 parts, starch 3-5 parts, solids 62-68%. Top coat: fine GCC/clay blend 70/30 to 50/50, latex 12-15 parts, co-binder 0.3-0.5 parts, solids 60-65%. Automated pigment slurry handling and inline solids measurement reduce coating loss by 3-5% compared to manual batching.
Maintenance Recommendations
- Coating screens: 100-150 micron mesh, inspect daily, replace weekly or when pressure drop exceeds 0.5 bar
- Coater blades: Replace every 4-8 hours of operation; blade edge inspection ensures streak-free coating
- Backing roll: Regrind every 6-12 months; hardness maintained at 85-95 P&J for uniform coat weight
- Dryer hood air filters: Clean weekly; replace monthly to maintain heat transfer efficiency
For technical consultation and equipment quotation, contact our engineering team.
Email: leizhanzhang@gmail.com