In the field of industrial manufacturing, metal anti-scratch UV coating is becoming the core technology of surface protection. This coating is instantly cured by ultraviolet rays to form a high-hardness, wear-resistant protective layer, which is widely used in automotive parts, electronic housings, building metal components and other fields. Its core advantages include:
Super wear resistance: The use of additives such as nano-alumina enables the coating to maintain a gloss retention rate of more than 80% in the steel wool test, far exceeding traditional coatings.
Environmentally friendly and efficient: The solvent-free formula reduces VOC emissions, the curing speed is less than 30 seconds, and the energy consumption is 75%-90% lower than the thermal curing process.
Multi-material compatibility: Coordinated application with UV inks, adhesives, and pressure-sensitive adhesives to achieve integrated processing of metal substrates.
Industry pain points and breakthrough solutions
The dense surface of the metal substrate often leads to insufficient coating adhesion. Shenzhen U-Sunny's T-7131 low shrinkage UV resin solves this problem through triple technical breakthroughs:
Shrinkage <3%: significantly lower than the industry average, avoiding micro cracks during curing and ensuring coating integrity.
Double adhesion promotion: The molecular chain design combines phosphate groups, and 5B-level adhesion can be achieved on surfaces such as aluminum alloys and stainless steel without additional coupling agents.
Weather resistance upgrade: Withstands 200°C high temperature and chemical corrosion, suitable for harsh environments such as automotive interiors.
Analysis of collaborative application scenarios
UV ink printing
T-7131 resin is used as the main material, combined with rosin-modified polyester prepolymer (such as UVP 305 series), to achieve high-precision printing on the surface of metal signs and cans, while providing a scratch-resistant protective layer.
Adhesive compounding
In the metal-PVC lamination process, this resin is compounded with UV pressure-sensitive adhesive (such as UVA 505) to solve the bonding strength problem between metal and plastic, and the peeling force is increased by 40%.
Pressure-sensitive tape manufacturing
By adding nano-alumina (particle size 150-250nm), UV-cured pressure-sensitive tape has both high adhesion and surface scratch resistance, which is suitable for metal shell mounting of electronic products.
Technology Trends and Case Studies
Mankiewicz, a German automotive supplier, uses similar technology to achieve the following in UV coatings for metalized parts:
50% improvement in scratch resistance vs. traditional solvent-based coatings
Production line efficiency increased by 3 times (curing time <15 seconds)
Shenzhen U-Sunny's T-7131 resin has been used in aluminum alloy mobile phone frame coatings. After 500 hours of UV accelerated aging, it still maintains more than 90% gloss, verifying its long-term protection capabilities.