what is a Polyurethane Coating Production Line？
2025-12-08 11:34:52
By : root
A
Polyurethane Coating Production Line is an automated, integrated industrial system designed to manufacture polyurethane (PU) coatings through a series of sequential, precision-controlled processes. It converts raw materials—including polyurethane resin, isocyanate hardeners, solvents, pigments, fillers, and functional additives—into high-performance finished coatings with properties like wear resistance, corrosion protection, weatherability, and strong adhesion.
It typically includes 7 key steps:
- Raw material storage & metering (precision batching per formula)
- Premixing (blending resin, solvents, and additives to form a uniform base)
- Dispersion (breaking up pigment/filler agglomerates via high-speed shear force)
- Grinding (refining particle size to 10-50μm with sand mills/bead mills)
- Formulation adjustment (tuning viscosity, color, and adding curing agents/auxiliaries)
- Filtration & degassing (removing impurities and bubbles for smooth application)
- Filling & packaging (automated ，weighing, and labeling for 15L/200L drums)
Critical equipment includes:
- High-speed dispersers, sand mills/bead mills (core dispersion/grinding units)
- PLC control system (automates temperature, speed, and flow rate)
- VOCs recovery & wastewater treatment systems (environmental compliance)
- Vacuum degassing equipment (eliminates coating bubbles)
PU coatings produced are widely used in:
- Industrial corrosion protection (pipes, bridges, ships, chemical equipment)
- Automotive industry (body topcoats, clear coats, interior part coatings)
- Furniture & woodworking (wear-resistant floor/ furniture finishes)
- Construction (exterior wall insulation coatings, polyurethane elastic floorings)
- Electronics (insulating, scratch-resistant coatings for device casings)
- High automation: PLC-controlled full process reduces labor and ensures batch consistency.
- Versatility: Adapts to solvent-based, water-based, or solvent-free PU coatings (one-component/two-component).
- Precision control: Maintains process temperature (25-40℃) to avoid premature resin curing.
- Environmental compliance: Meets standards like EU REACH and China GB 30981 via VOCs recovery.
- Raw Material Preparation: Inspects raw material purity (e.g., NCO content of polyurethane resin), meters materials according to formula ratios, and conveys them to premixing tanks.
- Premixing: Stirres resin, solvents, dispersants, etc., at low speed in mixing tanks to form a uniform base system and prevent pigment/filler sedimentation.
- Dispersion: Adds pigments/fillers (e.g., titanium dioxide, carbon black) to the base, and breaks up agglomerates into the base via shear force generated by high-speed dispersers (rotational speed: 1000-3000rpm) for preliminary dispersion.
- Grinding: Feeds the dispersed slurry into sand mills, and refines pigment/filler particle size to target values through impact and friction of grinding media (e.g., zirconium beads) to improve coating hiding power and adhesion.
- Formulation Adjustment: Adds additives such as hardeners, leveling agents, and defoamers, adjusts coating viscosity (typically 20-100s, Ford cup #4) and color to ensure product performance meets standards.
- Filtration & Degassing: Removes impurities via multi-stage filtration, and eliminates bubbles through vacuum degassing (vacuum degree: -0.06~-0.09MPa) to avoid pinholes on the surface after construction.
- Filling & Packaging: Automatically fills, weighs, and caps products, then labels and warehouses them, with full recording of production data (batch number, formula, test results).
Due to properties such as high wear resistance, strong corrosion resistance, excellent weather resistance, and strong adhesion, products from this production line are widely used in:
- Industrial Corrosion Protection: Anticorrosive coatings for chemical equipment, pipelines, bridges, and ships;
- Automotive Industry: Topcoats for automobile bodies and coatings for interior parts (e.g., polyurethane clear coats to improve gloss);
- Furniture & Wood Products: Wear-resistant topcoats for solid wood furniture and floors, combining decorativeness and protection;
- Construction Industry: External wall insulation coatings and floor coatings (e.g., polyurethane elastic floor coatings);
- Electronic & Electrical Industry: Insulating and scratch-resistant coatings for electrical enclosures.
- High Automation: PLC-controlled full process from raw material conveying to packaging, reducing manual intervention with a production efficiency of 500-5000L/batch;
- Precise Process Control: Real-time temperature monitoring during dispersion and grinding (typically controlled at 25-40℃) to avoid premature curing of polyurethane resin;
- Strong Adaptability: Capable of producing one-component/two-component polyurethane coatings, supporting formula switching for solvent-based, water-based, and solvent-free systems;
- Environmental Compliance: Equipped with VOCs recovery devices and wastewater treatment systems, complying with environmental standards such as EU REACH and China GB 30981;
- Stable Product Quality: Ensures consistency in color, viscosity, and performance across batches through precision metering and uniform dispersion.
Suppliers of Polyurethane Coating Production Line：
Jinhua Machinery Provides High Quality And Effective Fertilizer Manufacturing Equipment, Straw Processing Equipment, Waste Processing Equipment, And Mining Equipment.If you are looking for fertilizer-making machines and production lines, feel free to contact us.Tel：0811-8185429 011-820-8086 E-mail：
jinhuaindonesia@gmail.com
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