In industrial applications requiring precise graphic transfer-such as metal etching, glass acid engraving, anodizing masking, and electroplating protection-the choice of a reliable photoresist material is critical. Engineers and procurement specialists frequently face challenges with development residue, inadequate chemical resistance, poor adhesion, or limited process compatibility.
Addressing these core challenges, T-7111 Photoresist Resin has been formulated. It is more than just a resin; it is an optimized anti-etching process solution, designed to provide a hard, protective film even before UV curing and to withstand the harshest chemical environments afterward.
Core Advantages of T-7111: Why It's the Preferred Choice
T-7111 is engineered around the principles of "Efficiency, Durability, and Flexibility," with its performance directly addressing key production line demands:
Exceptionally Clear, Residue-Free Development:
After UV exposure, the unexposed resin areas are rapidly and completely removed in a mild alkaline solution (e.g., 1% sodium carbonate). Its residue-free development characteristic (approx. 20 seconds) ensures sharp, high-precision edges for etching/plating, eliminating defects caused by incomplete development.
Superior Chemical Resistance:
This is the cornerstone of T-7111. The cured film exhibits outstanding resistance to various strong acid etchants (e.g., ferric chloride, hydrochloric acid, nitric acid) and weak alkaline solutions. It is the ideal protective coating for stainless steel etching, glass acid etching, and aluminum anodizing.
Excellent Adhesion on Diverse Substrates:
It demonstrates strong adhesion to challenging surfaces such as stainless steel, copper, aluminum, glass, and ceramics. This broad compatibility simplifies material management by eliminating the need for different inks for different substrates.
Production-Friendly, Boosting Efficiency:
Fast Tack-Free & Non-Blocking: Achieves a 2H pencil hardness before UV curing. The dry, non-tacky surface allows for easy handling and film contact, reducing production wait times and defect rates.
Fast and Easy Stripping: After serving its protective purpose, the coating can be completely removed in 3-5 minutes using a 5% hot sodium hydroxide solution, facilitating easy cleaning and continuous production.
Two Primary Application Forms: Screen Ink & Spray Coating
T-7111 can be formulated into two main application types to suit different production needs.
Application 1: High-Precision Screen Printing UV Ink
Ideal for flat or slightly curved surfaces like metal nameplates, PCB graphics, and precision filters.
Features: Excellent printability, fast tack-free drying, non-blocking with films, ensuring high-resolution image transfer.
Recommended Solvent: PMA (Propylene Glycol Methyl Ether Acetate) is suggested for optimal dissolution and lower odor.
Application 2: 3D Curved Surface Spray UV Coating
Designed for 3D curved glass, formed metal parts, and complex-shaped nameplates unsuitable for screen printing.
Features: Good leveling, excellent pigment wetting for easy coloring, and uniform coverage on complex geometries.
Recommended Solvent: For faster evaporation and lower drying temperatures, BA (Butyl Acetate) or Ethyl Acetate is recommended.
Formulation & Performance Optimization Guide
T-7111 can be synergistically combined with other functional resins to meet specific, demanding requirements:
Monomer Selection: To maintain excellent development and stripping speed, use low-functionality or ethoxylated (EO) reactive diluents. Avoid high-crosslink-density monomers that may hinder development.
Enhancing Chemical Resistance: To improve the coating's resistance in more aggressive environments (e.g., specific solvents, strong oxidizers), adding T-7133 resin can significantly boost chemical and solvent resistance.
Accelerating Development/Stripping: For maximum line efficiency, blending with T-7110 resin can further increase development speed and stripping efficiency.
System Adjustment: T-7111 is compatible with the T-7112 and T-7113 photoresist series, allowing for fine-tuning of properties like hardness and flexibility.
Typical Industry Applications
Metal Fabrication: Etching of stainless steel/brass nameplates, decorative metal sheets, elevator button panels.
Glass Decoration: Acid-etched patterns on mobile phone covers, glassware, artistic glass.
Surface Treatment: Localized anodizing protection for aluminum parts, plating rack coating, selective plating.
Electronics: Localized protection for Flexible Printed Circuits (FPC), metal mask production.
Conclusion
T-7111 Photoresist Resin, with its 100% solids content, exceptional etch resistance, broad substrate adhesion, and versatile process adaptability, has established itself as a benchmark material in high-precision industrial masking. Whether for high-efficiency screen printing or challenging spray coating applications, it delivers a stable and reliable protective solution.