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Analysis of Key Techniques in Coating UV Wood Coatings (Part 2)

Release time:

2026-03-10 17:23

Analysis of Key Techniques in Coating UV Wood Coatings (Part 2)

The precision of UV wood coating application is not only reflected in material selection and construction parameters, but also hinges on the coordinated control of equipment systems and the meticulous management of environmental parameters. This article systematically elaborates on the key technical aspects of UV wood coating application from three major perspectives: equipment system control, environmental parameter management, and quality control systems, providing theoretical guidance and practical references for industry professionals.

1. Equipment System Control

1. Coordinated Coating Equipment

The roller coating system must achieve dynamic matching of the three parameters—pressure, speed, and temperature: The coating roller pressure is automatically adjusted according to the paint viscosity to ensure uniform coating; the conveyor belt speed is synchronized with the curing oven’s linear speed to prevent stretching and deformation of the coating film; and the paint tank temperature control module maintains the optimal application viscosity for the coating. As for the spray coating system, the key is to precisely control atomization pressure and spray pattern overlap to produce a coating surface free of joint marks.

2. Optimization of the Curing System

The curing process shall employ a composite method of “infrared leveling + UV curing”: During the infrared irradiation stage, the coating molecules achieve initial directional alignment, eliminating pinholes caused by solvent evaporation; in the UV curing stage, precise control of light intensity distribution enables progressive curing from the surface to the deeper layers. For thick-coated products, a “pulsed” energy output mode must be used to prevent cracking caused by the accumulation of internal stress.

3. Integrated Cooling System

After curing, multiple cooling stages are implemented: The first stage employs forced air cooling to rapidly reduce the surface temperature of the workpiece; the second stage uses water‑cooled rollers for contact‑based heat dissipation; and the third stage leverages phase‑change materials to achieve constant‑temperature control. The cooling system must be synchronized with the conveyor speed to ensure that the workpiece reaches a machinable temperature upon exiting the cooling zone.

II. Environmental Parameter Management

1. Microclimate Regulation

The painting workshop needs to be equipped with an independent microclimate system: the temperature control module employs PID regulation technology to maintain the required temperature fluctuation range for the process; the humidity control system utilizes a combination of rotor dehumidification and steam humidification to ensure stable humidity levels. For high‑precision coating lines, local cleanrooms must be installed to maintain positive pressure and prevent external contaminants from entering.

2. Light Management

The construction area is equipped with a full-spectrum lighting system fitted with UV filters to prevent UV components in natural light from causing premature curing of the coating. The coating storage area features a completely darkened design and uses UV‑resistant packaging materials to extend product shelf life. Operators must wear professional safety goggles to protect their eyes from cumulative UV damage.

3. Air purification

The spray booth is equipped with a four‑stage air purification system: primary filters trap large particulate dust; medium‑efficiency filters capture micron‑sized particles; high‑efficiency filters remove nanoscale pollutants; and an activated carbon adsorption layer eliminates volatile organic compounds. The supply air system maintains a slightly positive pressure to prevent unfiltered external air from infiltrating. Regular wind speed uniformity tests are conducted to ensure a stable airflow pattern within the spray booth.

III. Quality Control System

1. Process Monitoring

Establish a dual-track system of “online inspection + offline sampling”: Use a laser profilometer in the coating stage to monitor coating thickness in real time; employ a spectrometer in the curing stage to assess the degree of cure; and utilize an infrared thermal imager in the cooling stage to monitor temperature distribution. Each batch of products must undergo destructive tests such as adhesion testing, hardness testing, and abrasion resistance testing to ensure consistent quality.

2. Finished Product Inspection

Establish multi‑dimensional inspection standards: Use a standard light box for visual inspection to assess the fullness of the coating from different angles; employ classic methods such as the grid test, pencil hardness test, and Taber abrasion test for physical performance evaluation; and focus on indicators like yellowing resistance, alcohol resistance, and resistance to thermal cycling in chemical performance testing. Build a quality traceability system to ensure full control over the entire process, from raw materials to finished products.

IV. Conclusion

Equipment system control and environmental parameter management constitute the two major safeguard systems for UV wood coating technology: the former ensures process stability through precision manufacturing, while the latter eliminates quality fluctuation factors via environmental regulation. A comprehensive quality control system runs throughout the entire process, leveraging data-driven approaches to achieve continuous quality improvement. With the advancement of smart manufacturing technologies, UV coating processes are evolving toward greater automation, digitalization, and intelligence. Only by actively embracing technological innovation and establishing a holistic quality control model can we secure a leading position in the competitive landscape.

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Boxing Recommended Products – UV Wood Coatings
Putty primer
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-520	Polyester acrylate	Low viscosity, high gloss, excellent wettability, and cost-effective.
B-522	Polyester acrylate	Low shrinkage, excellent flexibility, strong adhesion, and high cost performance.
Sanding Primer
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-163	Modified epoxy acrylate	Good flexibility, excellent pigment wetting, and strong adhesion.
B-520	Polyester acrylate	Low viscosity, high gloss, excellent wettability, and cost-effective.
B-522	Polyester acrylate	Low shrinkage, excellent flexibility, strong adhesion, and high cost performance.
Primer
Product Model/English Abbreviation	Product Name/Product Type	Product Features
B-02	Phosphate ester acrylate	Enhance adhesion to substrates such as metal, glass, and plastic.
B-05	Phosphate ester acrylate	Enhance adhesion to substrates such as metal, glass, and plastic.
B-113	Bisphenol A epoxy acrylate	High hardness, high gloss, high fullness, containing 20% TPGDA.
B-165	Modified epoxy acrylate	Good flexibility and strong adhesion.
B-522	Polyester acrylate	Low shrinkage, excellent flexibility, strong adhesion, and high cost performance.
B-535	Polyester acrylate	Good adhesion, fast curing, excellent flexibility, and yellowing resistance.
B-546	Polyester acrylate	Good adhesion, fast curing, and excellent flexibility.
White primer
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-520	Polyester acrylate	Low viscosity, high gloss, excellent wettability, and cost-effective.
B-522	Polyester acrylate	Low shrinkage, excellent flexibility, strong adhesion, and high cost performance.
B-529	Polyester acrylate	Good adhesion, low shrinkage, and excellent resin compatibility.
B-560	Polyester acrylate	Fast curing and excellent pigment wetting.
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 photoinitiator	Low color, antioxidant and polymerization inhibitor, enhanced curing rate
B-301	Aromatic Polyurethane Acrylate	Fast curing, good toughness, and excellent grindability.
B-302	Aromatic Polyurethane Acrylate	Fast curing, high strength, good toughness, and excellent grindability.
B-574C	Polyester acrylate	Low viscosity, low odor, good wettability, suitable for LED UV applications.
B-601	Aromatic Polyurethane Acrylate	High hardness, scratch resistance, chemical resistance, and high cost performance.
B-609	Aliphatic polyurethane acrylate	Fast curing, high hardness, scratch resistance, and chemical resistance.
B-868	Organosilicon Photocurable Resin	Good leveling, smooth finish, fast curing, and stain resistance.
B-868H	Organosilicon Photocurable Resin	Good 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, good toughness, and excellent chemical and abrasion resistance.
Matte finish paint
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 photoinitiator	Low color, antioxidant and polymerization inhibitor, enhanced curing rate
B-328M	Aliphatic polyurethane acrylate	Low gloss, low viscosity, good wettability, pleasant to the touch.
B-328R	Aliphatic polyurethane acrylate	Low gloss, excellent matting effect, good wetting properties, and a fine, smooth hand feel.
B-333	Aliphatic polyurethane acrylate	Low viscosity, good matting effect, excellent wettability, and good flexibility.
B-572	Polyester acrylate	Low viscosity, low odor, good wettability, suitable for LED UV applications.
B-650A	Aliphatic polyurethane acrylate	Low viscosity, excellent matting effect, fast curing, and good wettability.
B-868	Organosilicon Photocurable Resin	Good leveling, smooth finish, fast curing, and stain resistance.
B-868H	Organosilicon Photocurable Resin	Good 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, good toughness, and excellent chemical and abrasion resistance.
Bright white paint
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, good toughness, and excellent 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, good wettability, suitable for LED UV applications.
B-601	Aromatic Polyurethane Acrylate	High hardness, scratch resistance, chemical resistance, and high cost performance.
B-868	Organosilicon Photocurable Resin	Good leveling, smooth finish, fast curing, and stain resistance.
B-868H	Organosilicon Photocurable Resin	Good leveling, smooth finish, fast curing, and stain resistance.
B-912	Aliphatic polyurethane acrylate	Fast curing, high hardness, good toughness, and excellent chemical and abrasion resistance.
Adherent
Product Model/English Abbreviation	Product Name/Product Type	Product Features
B-05	Phosphate ester acrylate	Enhance adhesion to substrates such as metal, glass, and plastic.
B-509B	Polyester acrylate	Good adhesion, excellent flexibility, and excellent pigment wetting.
B-531	Polyester acrylate	Good adhesion, impact resistance, excellent flexibility, and yellowing resistance.
B-535	Polyester acrylate	Good adhesion, fast curing, excellent flexibility, and yellowing resistance.
B-546	Polyester acrylate	Good adhesion, fast curing, and excellent flexibility.
B-590	Polyester acrylate	Good adhesion, fast curing, and excellent pigment wetting.
Filler type
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-520	Polyester acrylate	Low viscosity, high gloss, excellent wettability, and cost-effective.
B-522	Polyester acrylate	Low shrinkage, excellent flexibility, strong adhesion, and high cost performance.
B-529	Polyester acrylate	Good adhesion, low shrinkage, and excellent resin compatibility.
Retouch color
Product Model/English Abbreviation	Product Name/Product Type	Product Features
B-560	Polyester acrylate	Fast curing and excellent pigment wetting.
Hardened
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-301	Aromatic Polyurethane Acrylate	Fast curing, good toughness, and excellent 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, good wettability, suitable for LED UV applications.
B-601	Aromatic Polyurethane Acrylate	High hardness, scratch resistance, chemical resistance, and high cost performance.
B-912	Aliphatic polyurethane acrylate	Fast curing, high hardness, good toughness, and excellent chemical and abrasion resistance.
Matte
Product Model/English Abbreviation	Product Name/Product Type	Product Features
B-328M	Aliphatic polyurethane acrylate	Low gloss, low viscosity, good wettability, pleasant to the touch.
B-328R	Aliphatic polyurethane acrylate	Low gloss, excellent matting effect, good wetting properties, and a fine, smooth hand feel.
B-329D	Aliphatic polyurethane acrylate	Low irritation, low viscosity, excellent wettability, and pleasant to the touch.
B-333	Aliphatic polyurethane acrylate	Low viscosity, good matting effect, excellent wettability, and good flexibility.
B-650A	Aliphatic polyurethane acrylate	Low viscosity, excellent matting effect, fast curing, and good wettability.
Solid-color paint
Product Model/English Abbreviation	Product Name/Product Type	Product Features
B-519	Self‑Curing Polyester Acrylate	Self‑initiated Photocuring Performance
B-530	Polyester acrylate	Low viscosity, excellent hydrophobicity, thixotropic properties, and improved ink mist.
B-560	Polyester acrylate	Fast curing and excellent pigment wetting.
Yellowing resistance
Product Model/English Abbreviation	Product Name/Product Type	Product Features
B-160D	Modified epoxy acrylate	Good flexibility, yellowing resistance, and strong adhesion.
B-431	Alicyclic Specialty Acrylates	Yellowing resistance, excellent wettability, low viscosity, fast curing.
Spray coating
Product Model/English Abbreviation	Product Name/Product Type	Product Features
B-160D	Modified epoxy acrylate	Good flexibility, yellowing resistance, and strong adhesion.
Roller Coating
Product Model/English Abbreviation	Product Name/Product Type	Product Features
B-100	Bisphenol A epoxy acrylate	High hardness, high gloss, excellent chemical resistance, and rich body.
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-163	Modified epoxy acrylate	Good flexibility, excellent pigment wetting, and strong adhesion.
B-165	Modified epoxy acrylate	Good flexibility and strong adhesion.
B-520	Polyester acrylate	Low viscosity, high gloss, excellent wettability, and cost-effective.
B-522	Polyester acrylate	Low shrinkage, excellent flexibility, strong adhesion, and high cost performance.
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 performance with black ink pigments.
B-520	Polyester acrylate	Low viscosity, high gloss, excellent wettability, and cost-effective.
B-574C	Polyester acrylate	Low viscosity, low odor, good wettability, suitable for LED UV applications.
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 photoinitiator	Low color, antioxidant and polymerization inhibitor, enhanced curing rate
B-241	Aliphatic polyurethane acrylate	Fast matting speed, excellent skin feel, and yellowing resistance.
B-27	Active amine photoinitiator	Low color, benzene-free, low odor, antioxidant and anti‑polymerization.
B-570	Polyester acrylate	Low viscosity, benzene-free, low odor, suitable for LED UV applications.
B-574	Polyester acrylate	Benzene-free, low odor, and VOCs meet cigarette pack standards.
B-574C	Polyester acrylate	Low viscosity, low odor, good wettability, suitable for LED UV applications.
Excimer lamp
Product Model/English Abbreviation	Product Name/Product Type	Product Features
B-241	Aliphatic polyurethane acrylate	Fast matting speed, excellent skin feel, and yellowing resistance.
Skin feel
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-165	Modified epoxy acrylate	Good flexibility and strong adhesion.
B-241	Aliphatic polyurethane acrylate	Fast matting speed, excellent skin feel, and yellowing resistance.
B-328M	Aliphatic polyurethane acrylate	Low gloss, low viscosity, good wettability, pleasant to the touch.
B-328R	Aliphatic polyurethane acrylate	Low gloss, excellent matting effect, good wetting properties, and a fine, smooth hand feel.
B-574C	Polyester acrylate	Low viscosity, low odor, good wettability, suitable for LED UV applications.
B-868	Organosilicon Photocurable Resin	Good leveling, smooth finish, fast curing, and stain resistance.
B-868H	Organosilicon Photocurable Resin	Good leveling, smooth finish, fast curing, and stain resistance.
Monomer Recommendations
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	Good adhesion to plastics, excellent 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 abrasion resistance, and water resistance.
BM6263/DPHA-90	Dipentaerythritol hexaacrylate	High crosslink density, high hardness, chemical and abrasion resistance, and water resistance.

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Diverse Application Methods for UV Wood Coatings

Analysis of Key Techniques in Coating UV Wood Coatings (Part 1)