Dual-cure UV resin technology solves the curing problems of traditional UV resins in complex structures, thick coatings and light-shielding scenarios by combining UV light curing with secondary curing mechanisms (such as heat curing or moisture curing), and has become an efficient solution in the fields of electronic packaging, 3D printing, and automotive manufacturing. Shenzhen U-Sunny Technology Co., Ltd. (U-Sunny) continues to promote performance breakthroughs in dual-cure technology with its innovative photoinitiator system and resin formula. This article analyzes the cutting-edge trends and market value of dual-cure UV resins based on technical principles, industry applications, and U-Sunny Technology's product advantages.
1. Technical core of dual-curing UV resin
1.1 Advantages of dual-curing mechanism
Dual-curing technology combines the rapidity of UV light curing with the deep adaptability of secondary curing:
UV primary curing: Trigger the photoinitiator through a UV light source (such as LED 365nm/405nm) to achieve surface curing in seconds and improve production efficiency.
Secondary curing: Through low-temperature heating (such as 80℃@30 minutes) or moisture penetration, deep cross-linking is completed to ensure that the material is completely cured inside, especially suitable for thick coatings (>200μm) or light-shielding substrates.
Uyracure series of mixed photoinitiators (such as sulfonium salt and iodonium salt composite system) of Youyang Technology supports dual-band response, UV sensitivity as low as 7.9 mJ/cm², and is compatible with thermal initiation mechanism, significantly reducing energy consumption.
1.2 Resin formulation and performance optimization
Low shrinkage design: U-yang's cationic hybrid resin (such as U-9310) is cured by free radicals and cations, with a shrinkage of <0.5%, reducing the internal stress of the coating and improving the packaging reliability of precision electronic components.
High adhesion and weather resistance: Villon copolyester resin is used as an adhesion promoter to enhance the chemical bonding between the coating and difficult-to-attach substrates such as metal and glass, and UV absorbers (such as salicylic acid SA) are used to extend the outdoor service life.
2. Industry applications and innovative solutions of Youyang Technology
2.1 Electronic manufacturing: precision packaging and high temperature resistance requirements
In camera module and PCB board packaging, Youyang's U series dual-cure resin achieves UV initial curing within 5 seconds through mixed photoinitiator (IR1700+TPO), and then completes deep crosslinking by heating at 80℃. Its high temperature resistance (heat deformation temperature ≥180℃) adapts to the needs of automotive electronic packaging, while reducing heat damage to sensitive components.
2.2 Automotive industry: environmentally friendly coating and complex structure
Traditional solvent-based coatings rely on high-temperature baking, high energy consumption and large VOC emissions. Youyang's water-based dual-cure polyurethane system uses water as a diluent, reduces VOC emissions by 70%, and achieves low-temperature curing (<50℃) through self-emulsification technology, which is suitable for high-gloss spraying of automotive interior and exterior trims.
2.3 3D printing: multi-material composite and biocompatibility
U-Yang's U series dual-curing resin supports visible light (405nm) to trigger initial curing, and then completes deep cross-linking through moisture penetration. It is compatible with biocompatible materials (such as dental guide resins), and the cell survival rate is >95%, promoting innovation in medical 3D printing.
3. Technological breakthroughs of Shenzhen U-Sunny Technology
3.1 R&D capabilities across the entire industry chain
U-Sunny Technology provides customized services from resin synthesis to photoinitiators:
Cationic hybrid resin: Combined with dual-curing mechanism, the penetration depth is increased by 30%, solving the problem of uneven curing of thick coatings.
Environmental additives: The water-based UV system has passed REACH certification, with a heavy metal content of <0.1ppm, suitable for food packaging and medical devices.
3.2 Intelligent production and patented technology
Through patented technologies (such as glass film plasticizer mixing devices), U-Sunny optimizes the mixing efficiency of raw materials and ensures that the batch stability of resin formulas reaches more than 99.5%. Its digital production platform supports customers to adjust the curing speed and wavelength response range as needed to adapt to a variety of scenarios.
4. Future trends: green and intelligent
Visible light curing upgrade: The ruthenium-based photoinitiator developed by Youyang supports 450nm blue light curing, reducing UV radiation risks and equipment energy consumption.
Intelligent responsive resin: Temperature-sensitive or pH-sensitive resin can dynamically control the curing process, reduce energy waste, and expand into the field of flexible electronics and smart packaging
Dual-curing UV resin technology is reshaping the process standards of the manufacturing industry with its high efficiency, environmental protection and strong adaptability. Shenzhen U-Sunny Technology provides high-performance solutions to global customers through innovative formulas and full industrial chain layout. For more technical details, please visit U-Sunny Technology's official website or contact its technical team.
