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Application Methods for UV Wood Finish Coatings

Release time:

2026-04-07 06:28

Application Methods for UV Wood Finish Coatings

There are numerous methods for applying UV wood coatings, with different techniques suited to various workpiece geometries and production requirements. Selecting the appropriate application method is crucial for ensuring coating quality and enhancing production efficiency. Roller coating, spray coating, and curtain coating are three commonly used methods, each with its own technical characteristics and areas of application. Understanding the fundamental principles, advantages and disadvantages, and suitable application scenarios of these methods helps in making informed choices based on specific project needs.

I. Roller Coating Method

Roll coating is the most widely used application method for UV wood topcoats and is suitable for coating flat panel substrates.

1. Basic Principle

During roll coating, the coating material is transferred from the coating roller to the workpiece surface, with the coating thickness precisely controlled by a metering roller to produce a uniformly thick wet film, which is then cured in a UV curing unit. Depending on the coating requirements, roll coating can be categorized into single-roll coating and double-roll coating: the former is suitable for thinner coatings, while the latter is preferred for thicker coatings or applications with high fill requirements.

2. Applicable Scenarios

Large-scale, continuous production of flat panel materials such as flooring, cabinet door panels, furniture panels, and decorative panels. For workpieces with smooth surfaces and regular shapes, roll coating is the most efficient and cost-effective option.

II. Spraying Method

Spray coating is suitable for irregular surfaces, complex geometries, and workpieces that cannot be coated by roll coating.

1. Basic Principle

During spray coating, the coating material is atomized by a spray gun and then adheres to the workpiece surface. Spray-coating methods include air spraying, airless spraying, and electrostatic spraying. Air spraying uses compressed air to atomize the coating, resulting in excellent atomization; airless spraying employs high pressure to force the coating through the nozzle for atomization, offering high efficiency; and electrostatic spraying utilizes electrostatic attraction to ensure the coating adheres to the workpiece, achieving high coating utilization.

2. Applicable Scenarios

Coating of three-dimensional, solid workpieces such as carved components, curved-surface furniture, custom-shaped decorative moldings, and wood door trim. Air spraying delivers excellent atomization, making it ideal for thin coats and high-quality finishes; airless spraying offers high efficiency, suitable for thick coatings and large-area, complex-shaped parts; and electrostatic spraying is well-suited for mass-produced metal and wood products.

III. Dip-Coating Method

Spray coating is suitable for coating large-area flat panels, particularly for products with stringent requirements for coating thickness and leveling.

1. Basic Principle

During curtain coating, the coating material is extruded through a narrow slot in the coating head to form a continuous curtain, beneath which the workpiece passes, ensuring uniform coverage of the coating on its surface. Curtain coating equipment is typically equipped with a coating recovery system, allowing excess coating that does not adhere to the workpiece to be recirculated and reused. The width of the coating head’s slot is adjustable, enabling control over the coating flow rate and curtain thickness.

2. Applicable Scenarios

High-gloss coatings for large-area flat panels, as well as products requiring high fullness—such as piano panels, high-end furniture panels, and decorative panels. The topcoat applied by curtain coating delivers a thick, uniform film, making it particularly well suited for high-gloss finishes that demand a mirror-like finish.

IV. Conclusion

The three commonly used application methods for UV wood topcoats each have distinct characteristics. Roller coating is well-suited for high-volume production of flat panels, offering high efficiency and low cost; spray coating is ideal for irregularly shaped and complex workpieces, providing strong adaptability; and curtain coating is best for products requiring high film build and excellent surface smoothness. In practical production, the appropriate method—or a combination of methods—should be selected based on workpiece geometry, production volume, desired coating performance, and budget constraints, in order to achieve optimal coating results and manufacturing efficiency.

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Bossin Recommended Products – UV Wood Coatings
Glossy topcoat
Product Model/English Abbreviation	Product Name/Product Type	Product Features
B-113	Bisphenol A epoxy acrylate	High hardness, high gloss, high fullness, containing 20% TPGDA.
B-163	Modified epoxy acrylate	Good flexibility, excellent pigment wetting, and strong adhesion.
B-165	Modified epoxy acrylate	Good flexibility and strong adhesion
B-21C	Active amine photosensitizing promoter	Low color number, antioxidant and anti-polymerization, and enhanced curing rate
B-301	Aromatic Polyurethane Acrylate	Fast curing, excellent toughness, and good grindability.
B-302	Aromatic Polyurethane Acrylate	Fast curing, high strength, good toughness, and excellent grindability.
B-574C	Polyester acrylate	Low viscosity, low odor, excellent wettability, suitable for LED UV
B-601	Aromatic Polyurethane Acrylate	High hardness, scratch resistance, chemical resistance, and excellent cost performance.
B-609	Aliphatic polyurethane acrylate	Fast curing, high hardness, scratch resistance, and chemical resistance.
B-868	Organosilicon UV-Curable Resin	Excellent leveling, smooth finish, fast curing, and stain resistance.
B-868H	Organosilicon UV-Curable Resin	Excellent leveling, smooth finish, fast curing, and stain resistance.
B-910A2	Aliphatic polyurethane acrylate	Low viscosity, yellowing resistance, chemical resistance, and steel-wool resistance.
B-912	Aliphatic polyurethane acrylate	Fast curing, high hardness, excellent toughness, and outstanding chemical and wear resistance.
Matte topcoat
Product Model/English Abbreviation	Product Name/Product Type	Product Features
B-160D	Modified epoxy acrylate	Good flexibility, yellowing resistance, and strong adhesion.
B-163	Modified epoxy acrylate	Good flexibility, excellent pigment wetting, and strong adhesion.
B-21C	Active amine photosensitizing promoter	Low color number, antioxidant and anti-polymerization, and enhanced curing rate
B-328M	Aliphatic polyurethane acrylate	Low gloss, low viscosity, excellent wettability, and a pleasant hand feel.
B-328R	Aliphatic polyurethane acrylate	Low gloss, excellent matting, good wetting, and a fine, smooth, and silky hand feel.
B-333	Aliphatic polyurethane acrylate	Low viscosity, excellent matting performance, good wetting properties, and excellent flexibility.
B-572	Polyester acrylate	Low viscosity, low odor, excellent wettability, suitable for LED UV
B-650A	Aliphatic polyurethane acrylate	Low viscosity, excellent matting effect, fast curing, and good wettability.
B-868	Organosilicon UV-Curable Resin	Excellent leveling, smooth finish, fast curing, and stain resistance.
B-868H	Organosilicon UV-Curable Resin	Excellent leveling, smooth finish, fast curing, and stain resistance.
B-910A2	Aliphatic polyurethane acrylate	Low viscosity, yellowing resistance, chemical resistance, and steel-wool resistance.
B-912	Aliphatic polyurethane acrylate	Fast curing, high hardness, excellent toughness, and outstanding chemical and wear resistance.
Bright White Finish
Product Model/English Abbreviation	Product Name/Product Type	Product Features
B-113	Bisphenol A epoxy acrylate	High hardness, high gloss, high fullness, containing 20% TPGDA.
B-160D	Modified epoxy acrylate	Good flexibility, yellowing resistance, and strong adhesion.
B-301	Aromatic Polyurethane Acrylate	Fast curing, excellent toughness, and good grindability.
B-302	Aromatic Polyurethane Acrylate	Fast curing, high strength, good toughness, and excellent grindability.
B-560	Polyester acrylate	Fast curing and excellent pigment wetting
B-574C	Polyester acrylate	Low viscosity, low odor, excellent wettability, suitable for LED UV
B-601	Aromatic Polyurethane Acrylate	High hardness, scratch resistance, chemical resistance, and excellent cost performance.
B-868	Organosilicon UV-Curable Resin	Excellent leveling, smooth finish, fast curing, and stain resistance.
B-868H	Organosilicon UV-Curable Resin	Excellent leveling, smooth finish, fast curing, and stain resistance.
B-912	Aliphatic polyurethane acrylate	Fast curing, high hardness, excellent toughness, and outstanding chemical and wear resistance.
Single Product Recommendation
Product Model/English Abbreviation	Product Name/Product Type	Product Features
BM2223 (TPGDA)	Di(propylene glycol) diacrylate	Good flexibility and low volatility
BM2224 (EO-HDDA)	Ethoxylated 1,6-hexanediol diacrylate	Excellent adhesion to plastics, good dilutability, and low volatility.
BM3231 (TMPTA)	Trimethylolpropane triacrylate	High crosslink density, high hardness, high gloss, and excellent wear resistance.
BM3235 (PET3A)	Pentaerythritol triacrylate	Fast curing, high crosslink density, high hardness, and excellent chemical resistance.
BM3380 (3EO-TMPTA)	Ethoxylated trimethylolpropane triacrylate	More flexible and less irritating than TMPTA.
BM6261 (DPHA-80)	Dipentaerythritol hexaacrylate	High crosslink density, high hardness, chemical and wear resistance, and water resistance.
BM6263 (DPHA-90)	Dipentaerythritol hexaacrylate	High crosslink density, high hardness, chemical and wear resistance, and water resistance.

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