Low-viscosity UV resin (viscosity 50–500 mPa·s at 25°C) is an important category of UV-curable materials. Owing to its superior performance compared to traditional high-viscosity UV resins and thermally cured resins, it is widely used in fields such as precision manufacturing, electronic packaging, and optical coatings. This paper analyzes its process advantages from four key aspects: fluid properties, curing efficiency, compatibility, and environmental friendliness, providing a reference for industrial applications.
1.Analysis of Core Process Advantages of Low-Viscosity UV Resin
Exceptional Flowability, Solving Precision Filling Challenges
Compared to conventional high-viscosity UV resins (viscosity ≥ 2,000 mPa·s), low-viscosity UV resin exhibits extremely low flow resistance. Through capillary action, it can fill micro-gaps of 0.01–0.05 mm without air bubbles within 30 seconds. This makes it highly suitable for precision applications such as optical fiber encapsulation and SMT underfilling, and it eliminates the need for high-pressure dispensing equipment, thereby reducing process costs.
Furthermore, the amount of reactive diluent (e.g., TPGDA, HDDA) required can be controlled at 10%–20% (compared to 30%–40% for high-viscosity resins), significantly lowering the curing shrinkage rate to 3%–5%. This reduction minimizes internal stress during curing, helping to prevent substrate warping and coating cracking, thereby balancing processability with product durability.
Additionally, the lower diluent content enhances the yellowing resistance, weatherability, and mechanical strength of the cured film, further ensuring both process feasibility and long-term product reliability.
2.Rapid Curing Characteristics, Significantly Improving Production Efficiency
Low-viscosity UV resin features short molecular chains and abundant reactive functional groups. Under exposure to 365–405 nm UV/LED light, it achieves full curing within 2–10 seconds (with surface drying in ≤ 2 seconds), significantly surpassing the efficiency of traditional thermally cured resins and high-viscosity UV resins, and can increase production line capacity by over 30%.
It is compatible with low-energy LED light sources (consuming only one-third the power of conventional UV mercury lamps), reducing energy consumption by more than 50% while minimizing oxygen inhibition effects. This ensures a balance between production efficiency and environmental sustainability.
3.Broad Compatibility, Adapting to Multi-Scenario Process Requirements
It is compatible with a variety of base resins, diluents, photoinitiators, and additives, making it suitable for multiple processes such as UV inkjet printing, roller coating, and dispensing encapsulation. It achieves Grade 1 adhesion (cross-cut test) to substrates including metals, plastics, and glass. The cured film demonstrates a fracture elongation of ≥40% and a tensile strength of ≥30 MPa, meeting the requirements of diverse fields such as electronics, optics, and coatings.
4.Environmental Protection and Safety Compliance, Aligning with Sustainable Production Trends
It adopts a 100% solid content formulation with zero VOC emissions, complying with GB/T 38597-2020 and EU REACH regulations. Its acid value is ≤2 mg KOH/g, effectively preventing corrosion of precision equipment and reducing maintenance costs.
Specialized versions, such as those for food packaging and nail gels, can pass FDA and SGS certifications, with heavy metal content ≤10 ppm, meeting stringent safety and compliance requirements.
5.Industrial Application Cases and Product Compatibility
In response to industrial demands, our company has developed a series of targeted products designed to adapt to various process requirements through molecular structure optimization.
- D2086T offers rapid curing, excellent surface drying, scratch resistance, low viscosity, and superior wetting and leveling properties. It maintains 5B adhesion to PVC film even with 5% black pigment addition, provides excellent adhesion to most plastic substrates, and exhibits strong chemical resistance.
- H173 (polyester acrylate resin) provides good adhesion to film materials, features low viscosity (no self-drying under 80°C cyclic heating), and offers outstanding yellowing resistance with a final yellowness index of 2.0, making it suitable for applications with high demands for low yellowing. It retains adhesion to PET and APET even with 10% pigment addition, and is suitable for inkjet applications (nozzle clogging resistance upon heating).
- W307 (plastic adhesion resin) demonstrates good adhesion and flexibility on various substrates, especially plastic materials, and exhibits good compatibility with polyurethane. For formulations requiring high viscosity, chemical resistance, scratch resistance, and adhesion, it can be compounded with ZC6538. For low-viscosity formulations, it can be compounded with D2086T. To balance flexibility, ZC6516 can be added. It is suitable for film material applications and shows good water wash resistance under both 80°C boiling water and water immersion tests.
6.summary
Low-viscosity UV resin has become a preferred high-efficiency and eco-friendly material in high-end manufacturing due to four core advantages, with its performance largely dependent on molecular structure and formulation optimization.
Our product series D2086T, H173, and W307 offer stable performance and can provide technical parameters, sample testing, and customized services to support efficient industrial applications.
Post time: Mar-03-2026
