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Eco-friendly UV wood coating

Release time:

2026-04-13 07:44

With increasingly stringent environmental regulations and growing consumer awareness of environmental protection, the wood coatings industry is accelerating its transition toward green, low-carbon practices. UV wood coatings, characterized by their high solids content and low volatile organic compound emissions, have become a key choice for environmentally friendly coating applications. In the field of UV wood coatings, solvent-free spray application and LED-UV curing represent two pivotal technological breakthroughs in environmental sustainability. Solvent-free spray application of UV coatings reduces solvent use and emissions at the source, while LED-UV curing further enhances the environmental performance of the coating process by lowering energy consumption and minimizing mercury pollution.

I. Solvent-Free UV Coating

In conventional spray coating applications, large amounts of organic solvents are typically added to ensure optimal atomization and leveling, resulting in substantial emissions of volatile organic compounds during the process and posing risks to both the environment and the health of operators. Solvent-free UV coatings, with their low-viscosity formulation, deliver outstanding application performance without the need for solvents.

1. Low-viscosity design

The core technology of solvent-free UV coating lies in the formulation design for low viscosity. By replacing conventional solvents with low-viscosity reactive diluents and optimizing the molecular weight distribution of the resin system, the coating can achieve the required spray viscosity without the addition of solvents. This low-viscosity approach not only ensures excellent atomization but also eliminates the environmental and health concerns associated with solvent evaporation.

2. Control of Volatile Organic Compounds in Construction

Because the coating formulation contains no volatile solvents, solvent-free UV spray coatings virtually eliminate volatile organic compound emissions during application. This characteristic eliminates the need for complex exhaust-gas treatment systems, thereby reducing both capital and operational costs for environmental protection equipment while significantly improving the working environment for operators. By achieving emission reductions across the entire value chain—from raw-material selection to the application process—solvent-free UV spray coatings have emerged as a key technological pathway for environmentally friendly coating processes.

II. LED-UV Curing Coatings

Traditional UV curing typically relies on mercury lamps as the light source; however, these lamps contain the toxic heavy metal mercury and suffer from high energy consumption, substantial heat generation, and a limited service life. In contrast, LED-UV curing technology uses light-emitting diodes as the light source, offering significant advantages in terms of environmental friendliness and energy efficiency.

1. Energy Conservation and Low Emissions

LED-UV light sources boast a significantly higher electro-optical conversion efficiency than conventional mercury lamps, leading to substantial reductions in energy consumption and carbon emissions. Moreover, LED-UV sources are mercury-free, thereby eliminating the risk of heavy-metal contamination associated with the disposal of mercury lamps and aligning with the principles of green manufacturing and the circular economy.

2. Service Life and Maintenance Costs

LED light sources typically have a service life that is several to even dozens of times longer than that of mercury lamps, significantly reducing the frequency of lamp replacements. This feature not only lowers maintenance costs and downtime but also decreases the volume of discarded lamps, thereby enhancing the environmental sustainability of the coating process across the entire lifecycle.

3. Low Heat Generation and Substrate Protection

LED-UV light sources emit a highly concentrated UV spectrum with virtually no infrared radiation, resulting in minimal temperature rise of the workpiece during curing. This characteristic prevents thermal damage to wood substrates, reduces cooling energy consumption, and further enhances the energy efficiency of the coating process.

III. Conclusion

Solvent-free spray coating and LED-UV curing technologies have enhanced the environmental sustainability of UV wood coatings from different perspectives. Solvent-free spraying, with its low-viscosity formulation, significantly reduces volatile organic compound emissions during application, thereby minimizing solvent use and exhaust generation at the source. Meanwhile, LED-UV curing, through energy-efficient, resource-saving design and mercury-free technology, lowers the carbon footprint of the coating process and mitigates the risk of heavy-metal contamination. The adoption of these two technologies is driving the wood-coating industry toward greater greenness and sustainability.

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Boxing Recommended Products – UV Wood Coatings
Solvent-free spraying
Product Model/English Abbreviation	Product Name/Product Type	Product Features
B-251	Aromatic Polyurethane Acrylate	Fast curing, excellent flexibility, and good wetting of black ink pigments.
B-520	Polyester acrylate	Low viscosity, high gloss, excellent wettability, and cost-effective
B-574C	Polyester acrylate	Low viscosity, low odor, excellent wettability, suitable for LED UV
LED-UV
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-21C	Active amine photosensitizing promoter	Low color number, antioxidant and anti-polymerization properties, and enhanced curing rate
B-27	Active amine photosensitizing promoter	Low color number, benzene-free, low odor, antioxidant and anti-polymerization
B-570	Polyester acrylate	Low viscosity, benzene-free, low odor, suitable for LED UV
B-574	Polyester acrylate	Benzene-free, low odor, and VOC levels meet cigarette pack standards.
B-574C	Polyester acrylate	Low viscosity, low odor, excellent wettability, suitable for LED UV
Individual 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	Ethoxy-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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