In the fields of precision electronic packaging, microstructure 3D printing and thin film coating, the fluidity and curing efficiency of materials directly determine product performance and production efficiency. **Low Viscosity UV Curing Resin** achieves ultra-low viscosity (<500 cP) while maintaining high reactivity through optimization of molecular design and formulation process, becoming a key material for solving the problems of complex structure filling and high-precision molding.
The U-9100A series of low-viscosity UV resins launched by Shenzhen U-Sunny Technology can achieve second-level curing at 300-400 mJ/cm² energy, and is compatible with LED long-wave light sources (365-405 nm). It has been successfully used in 5G electronic packaging glue, optical thin film coating and biomedical microfluidic chip manufacturing, helping customers increase production yield by more than 25%.
Technical advantages and performance breakthroughs
1. Ultra-low viscosity and high permeability
The viscosity of U-Sunny U-9100A series resins can be as low as 200 cP (25°C), with the following core advantages:
Micron-level filling ability: Easily penetrate microchannels or pore structures below 0.1 mm, reducing bubble defects (porosity <0.3%).
Fast leveling characteristics: surface tension <30 mN/m, self-leveling within 3 seconds, suitable for roll-to-roll (R2R) continuous coating process.
Compatible with high filler systems: 40% nano-silica or metal powder can be loaded, and the viscosity is still controlled within 800 cP.
2. High-speed curing and low shrinkage
U-5000 resin achieves dual curing synergy through the Hybrid Cationic-Free Radical System:
UV curing speed: surface curing is completed within 2 seconds under a 395 nm LED light source (energy density 350 mJ/cm²).
Volume shrinkage: <1.5% (conventional acrylic resin is about 6–8%), ensuring dimensional stability of precision devices (tolerance ±10 μm).
Deep curing ability: can penetrate 5 mm thick transparent substrate, curing degree>95% (FTIR detection).
3. Environmental stability and multi-functional adaptation
Moisture and heat resistance: 1,000 hours under 85℃/85% RH environment, hardness retention rate>90% (ISO 7619-1).
Wide substrate adhesion: Adhesion to glass, PET, PI and other materials reaches 5B (ASTM D3359).
Adjustable refractive index: 1.48–1.55 (@589 nm), adapted to optical lenses and AR/VR coating requirements.
Industry applications and customer cases
1. 5G high-frequency electronic packaging
In millimeter-wave antenna packaging, low-viscosity resins solve the filling problem of high-density interconnection (HDI):
Customer case: After a communication equipment manufacturer adopted U-9100A resin, the dielectric loss of the encapsulation glue was reduced to 0.002 (10 GHz), and the signal transmission efficiency was increased by 18%.
Process parameters: After vacuum potting, preheat at 80℃ for 10 seconds, UV curing for 3 seconds, and the production capacity was increased to 1,200 pieces per hour.
2. Biomedical microfluidic chips
The biocompatibility (ISO 10993 certification) and low viscosity characteristics of U-Sunny resin meet the needs of precise replication of microchannels:
Performance breakthrough: 100 μm wide channel replication accuracy reaches ±2 μm, and cell survival rate is >99%.
Mass production data: After a diagnostic equipment manufacturer introduced it, the chip production cost was reduced by 40%, and the batch consistency CV value was <1.5%.
3. Flexible display optical coating
For folding screen OCA optical adhesive, U-5000 resin achieves low temperature curing and high light transmittance:
Key parameters: light transmittance>92% (380–780 nm), bending resistance>200,000 times (R=3 mm).
Industry certification: Passed Samsung flexible display material standard (SAMSUNG QM Standard) and Huawei HUAWEI-QL-0002 certification.
Technology Trends and Future Innovations
According to Grand View Research data, the global low-viscosity UV resin market size reached US$870 million in 2023 and is expected to exceed US$1.8 billion in 2030, with a compound annual growth rate of 9.8%. Future technology evolution focus:
Intelligent viscosity control: Develop shear-thinning (Thixotropic) resins with static viscosity <300 cP, and the viscosity drops to 50 cP instantly during spraying.
Bio-based raw material substitution: Use renewable monomers such as itaconate to reduce carbon footprint by 35% (U-Sunny has completed laboratory verification).
Nano-functionalization: Add MXene nanosheets to improve thermal conductivity (>1.2 W/m·K) while maintaining viscosity <400 cP.
Low Viscosity UV Curing Resin is redefining the process limits of precision manufacturing through the dual breakthroughs of ultra-low viscosity and high-speed curing. Shenzhen U-Sunny Technology provides global customers with end-to-end solutions from R&D to mass production with its U-9100A series resins and customized formulation services. With the continuous development of semiconductor packaging, flexible electronics and biomedicine, this technology will continue to release innovative value in the field of high-precision manufacturing.