High quality White Coating Board Paper Machine, White Coating Board Paper Machine Manufacturer, White Coating Board Paper Machine Factory price

Product Details

Exactly What Finished Paper Grades Can You Produce with This Machine?

Coated Duplex Board with Gray Back (GD2 / GD3 / GT2): This is the highest-volume product for standard consumer cartons. The multi-wire system allows you to use cheap recycled waste paper (OCC or mixed papers) to form the thick core and bottom layers, saving massive raw material costs. Meanwhile, a premium bleached white layer topped with specialized clay coating is applied to the front surface, creating a perfect canvas for high-end product graphics.

Folding Boxboard (FBB / White Cardboard / GC1 / GC2): Composed of multiple layers of mechanical pulp sandwiched between chemical pulp, this premium grade offers extreme bulk and mechanical stiffness. It is the premier choice for global pharmaceutical packaging, cosmetics boxes, high-end confectionery cartons, and cigarette packaging.

Solid Bleached Sulfate (SBS): Made exclusively from bleached virgin chemical pulp throughout all layers. This ultra-pure, food-safe white board is engineered for luxury gift boxes, high-end electronic packaging (such as smartphone and laptop boxes), and premium liquid packaging.

White Top Linerboard: A specialized grade designed for the corrugating industry. It provides a brilliant white, clay-coated outer surface integrated onto a high-strength kraft liner base, ideal for heavy-duty shipping boxes that double as promotional retail displays.

Advanced Multi-Layer Production Process & Technology

I. Multi-Wire Sheet Forming Section (Structural Backbone)

To achieve high basis weight (GSM) without sheet delamination, our machine utilizes a Multi-Fourdrinier Wire or Top-Wire Hybrid Forming Section. Instead of pumping all fibers through a single headbox, the machine employs multiple dedicated hydraulic headboxes.

The surface layer receives clean, long-fiber bleached pulp for strength and brightness.
The core and backing layers receive high-yield, cost-effective recycled fibers.
As these separate webs meet on the forming fabric, they are dewatered under controlled vacuum elements, fusing into a single, high-density sheet with excellent directional tensile ratios and no risk of structural peeling.

II. Heavy-Duty Press Section (Water Removal & Bulk Preservation)

Before the sheet enters the energy-intensive thermal drying phase, water must be mechanically extracted. We utilize a combination of a Large Diameter Blind-Drilled Press and an advanced Long Nip Press (LNP) / Shoe Press. By applying massive hydraulic pressure over a wider nip area, the Shoe Press achieves a dryness level exceeding 45-48% before the sheet ever touches a steam cylinder. This drastically lowers your mill's overall steam consumption while preserving the maximum bulk and thickness of the paperboard—a critical factor for the stiffness of packaging board.

III. Pre-Drying and MG Cylinder Treatment

The wet paperboard travels through a series of multi-cylinder dryer groups equipped with enclosed cast-iron steam hoods and automatic pocket ventilation systems for uniform moisture profiles. For specific high-bulk grades, an oversized Yankee Dryer (MG Cylinder) is integrated into the pre-drying section. The sheet is pressed against the mirror-polished, steam-heated surface of the MG cylinder, imparting an initial high smoothness and flat profile to the top side before any chemical coating is applied.

IV. Precision On-Line Multi-Stage Blade Coating Section

This is where the magic happens. To create a surface worthy of luxury printing, the base paperboard passes through our On-Line Coating Workstations. Depending on your target market quality, we configure a double-stage or triple-stage coating layout:

1.The Pre-Coater (Rod or Blade Coater): Applies an initial layer of Kaolin clay, Calcium Carbonate ($CaCO_3$), and latex binders to fill the microscopic voids and pores on the paper surface.

2.The Top Coater (Precision Air Knife or Bent-Blade Coater): Applies the final finishing layer. The air-knife system ensures a perfectly uniform coating thickness that follows the contour of the paper, while the blade coater ensures absolute flatness.Immediately following each coating station, infrared (IR) drying units combined with air-foil hot air dryers instantly immobilize the coating color, preventing binder migration and surface mottling.

Comprehensive Technical Specifications

Parameter Description	Specification / Range
Paper Output	Coated Duplex Board (Gray Back), White Cardboard (FBB), White Top Liner
Grammage (Basis Weight)	150 - 500 g/m² (GSM)
Trimmed Width	1575 - 5200 mm (Customizable up to 6300 mm)
Paper Width on Dryer Cylinder	2000 - 5300 mm
Machine Gauge	3200 - 6300 mm
Design Speed	200 - 600 m/min
Working Speed	150 - 450 m/min
Production Capacity	30 - 500 t/d (Tons Per Day)
Drive Position	Left Hand or Right Hand Machine (According to client's workshop layout)

Downstream Application Scenarios

Investing in a white coating board paper machine allows your paper mill to tap into the most profitable, high-margin sectors of the global packaging market. The jumbo rolls and sheeted reams generated by our production lines are directly utilized by commercial printing houses and packaging converters to manufacture:
Premium Consumer Electronics Packaging: Ultra-stiff FBB and SBS boards are converted into cell phone boxes, smart-watch gift cases, and luxury earphone packaging that demand sharp, high-contrast spot-color printing and perfect 90-degree V-groove folding profiles.
Pharmaceutical and Healthcare Cartons: High-whiteness coated board with excellent back-side clean surfaces, specifically designed to pass through ultra-high-speed automated folding/gluing lines for medicine boxes, vaccine packaging, and vitamin cartons. The board surface is optimized for printing fine text and laser anti-counterfeiting codes.
Food and Beverage Secondary Packaging: Multi-ply boards optimized to withstand slight moisture variations, used for dry-food cartons, cereal boxes, tea/coffee displays, and outer carrier boxes for premium beers and wines.
Cosmetics, Perfume, and Luxury Gift Box Material: Heavy-weight duplex and white cardboard that support complex post-printing operations such as deep embossing, hot foil stamping, UV spot-coating, and matte/gloss laminations.

Frequently Asked Questions (FAQ)

Q1: Why should I choose an On-Line Coating system over an Off-Line Coating machine setup?

A: On-Line Coating integrates the chemical application stations directly into the main drying sequence of the paper machine. The base board is formed, pressed, dried, instantly coated, and finish-dried in one continuous, uninterrupted run. This setup eliminates the need for separate winding, heavy reel transport, and storage spaces, significantly reducing labor costs, edge trim waste, and overall footprint. It is highly recommended for paper mills aiming for high-volume, standardized production of a specific grade profile (e.g., mass-market Duplex Board).

Off-Line Coating, conversely, requires you to make jumbo rolls of uncoated base paper first, then move them to a separate coating machine. While it offers flexibility for mills that frequently switch between specialty coatings (like thermal or carbonless paper), it introduces higher handling risks, extra labor, and increased energy consumption during secondary unrolling and rewinding.

Q2: What is the maximum percentage of recycled waste paper I can use without compromising the surface quality of the white coated board?

A: Thanks to our advanced Multi-Wire Forming Technology, you can utilize up to 70% to 75% recycled fibers (such as domestic OCC, mixed waste paper, old newspapers) across the core and bottom layers of the board. This keeps your raw material cost per ton exceptionally low.

However, to ensure that the top printable surface meets commercial printing standards, the top layer (usually about 15-20% of the total sheet weight) must consist of high-quality bleached chemical virgin pulp or high-grade white ledger shavings. Combined with our dual-stage blade coating process, this guarantees a premium white exterior with zero bleed-through or spotting from the dark recycled core layers beneath.

Q3: How does your company assist with civil engineering design, installation, and commissioning for an international project?

A: We provide full EPC (Engineering, Procurement, and Construction) Turnkey Services for overseas buyers. The moment a contract is signed, we deliver:

1. Complete 3D layout designs and structural loading/foundation drawings so your local civil contractors can prepare the factory floor accurately.

2. Comprehensive process instrumentation and piping (P&ID) diagrams.

3. On-site dispatch of a dedicated team of senior mechanical engineers, automation specialists, and master papermakers to supervise the unboxing, mechanical positioning, piping connection, and electrical wiring.

4. Wet-run testing, commissioning, and optimization of the chemical coating recipe using your local water and fiber sources. We do not leave the site until your staff is fully trained and the machine achieves its contracted daily capacity and paper grade specifications.

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