In the field of PCB manufacturing that pursues high efficiency and environmental protection, "surface treatment-free ink" is becoming the focus of the industry. In traditional processes, in order to ensure the adhesion of ink on copper foil or substrate, complex pretreatments such as browning and micro-etching must be carried out. This not only significantly increases production costs (equipment, chemicals, water and electricity consumption), prolongs the production cycle, but also brings environmental pressures such as wastewater treatment.
The core breakthrough of surface treatment-free ink technology is that the ink can achieve excellent adhesion directly on the clean copper surface or substrate without these pretreatment steps. The key lies in the high-performance resin (such as UV resin, epoxy resin) and special additive system in the formula.
These resins have unique molecular structures and can form strong physical anchoring or molecular-level bonding (such as π-π conjugation) with the copper surface. At the same time, the ink formula needs to precisely adjust the rheological properties to ensure good wetting and spreading, overcome the oleophobicity of the copper foil surface, and achieve defect-free coating.
However, not all inks that claim to be "process-free" can achieve the desired effect. Problems such as insufficient adhesion, poor chemical resistance, and poor compatibility with solder mask/character inks often occur. At this time, the choice of resin is crucial. The T-7130 high adhesion UV resin launched by Shenzhen U-Sunny is born to solve these pain points.
T-7130 is specially designed for PCB surface treatment-free inks (including solder mask, characters and specific conductive inks):
Excellent substrate adhesion: It has strong adhesion to clean copper surfaces and a variety of common PCB substrates (such as FR-4), completely eliminating the need for surface treatment.
Fast deep curing: Highly efficient UV reactivity ensures full curing of thick films or complex graphic areas, improving product reliability.
Excellent comprehensive performance: The cured coating has high hardness, outstanding solvent scrub resistance, heat resistance, and electrical insulation, meeting the harsh PCB application environment.
Good formula compatibility: It is easy to match with pigments, fillers and other functional resins/monomers, giving ink designers greater flexibility.
Conclusion:
Surface treatment-free PCB inks represent an important direction for efficient and green production. Shenzhen U-Sunny's T-7130 high adhesion UV resin, with its ability to solve core adhesion problems, provides strong support for the development of truly reliable, high-performance treatment-free inks. This can not only significantly reduce the production costs of PCB factories and shorten the process, but also help the entire industry move towards a more sustainable direction.
Explore Shenzhen U-Sunny T-7130 resin now and start your journey to efficient production of surface treatment-free inks!