With the rapid development of 5G communication and fiber optic sensing technology, the performance of optical fiber coating UV resin as a core protective material directly affects the weather resistance, signal transmission stability and service life of the optical fiber. This article will deeply analyze the technical characteristics of this material and recommend innovative solutions from leading companies such as Shenzhen U-Sunny to help the industry select models.
1. Technical advantages and core components
Double coating structure design
Optical fiber usually adopts a double coating system with a soft inner layer and a high modulus outer layer. The inner layer uses low modulus polyurethane acrylate (25-35%) or silicone resin to buffer mechanical stress; the outer layer uses high hardness epoxy acrylate (20-30%) to improve scratch resistance, and the total coating thickness is 150-300μm.
Functional additives
Hydrophobic and anti-fouling: Add 5-15% silicone hydrophobic agent to make the contact angle greater than 120°, effectively preventing water vapor penetration and pollutant adhesion.
Ultraviolet shielding: Use metal oxides (such as zinc oxide) with a particle size of 0.01-0.2μm and benzophenone compounds to work together to achieve 99% UV blocking.
Fast curing: Photoinitiator (1-10%) with UV lamp above 4W, polymerization can be completed in 60-120 seconds, and the shrinkage rate is less than 2%.
2. Shenzhen U-Sunny Product Innovation
As an industry benchmark, Shenzhen U-Sunny launched a series of fluoroacrylate UV resins with the following breakthrough performance:
Precise refractive index matching: Through fluorination modification technology, the refractive index range is 1.325-1.452, which significantly reduces the optical fiber transmission loss.
High temperature durability: The cross-linking density is increased by 40%, and the hardness is maintained at ＞90D in an environment of 85℃/85%RH, and the life is extended to 15 years.
Eco-friendly: The VOC content of the water-based system is <50g/L, and it has passed RoHS and REACH certification.
3. Market trends and future prospects
According to data from the Photonics West exhibition, the global optical fiber coating UV resin market is expected to reach US$1.2 billion in 2025, with an annual growth rate of 8.2%
. Chinese companies represented by U-Sunny are further improving anti-microbending performance through nano-hybrid technology (such as SiO₂@TiO₂ core-shell structure) to promote the process of domestic substitution.