UV Protective Adhesive Blue Solvent Free Fast Curing CNC High Gloss Coating for Electronics 3769A 67000mPa.s

Product Overview

UV Protective Adhesive Blue Solvent Free

3769A is a blue, solvent-free UV-curable protective adhesive specially formulated for high-gloss surface protection in high-end electronics CNC machining. With a viscosity of 67000 mPa.s at 25°C, it forms a stable and uniform coating that cures rapidly under UV energy of 800 mJ/cm². The cured film features low hardness and excellent toughness, and can be peeled off easily in one piece without any residue, keeping CNC-machined parts glossy, clean and scratch-free throughout the whole process.

Key Features

• Fast curing, solvent-free - boosts production efficiency and meets environmental protection requirements
• Low hardness, excellent toughness - 35 Shore A hardness with 360% elongation at break, resistant to impact and deformation
• Easy to peel, no residue - the cured film peels off cleanly in one piece without leaving any adhesive residue
• Wide substrate compatibility - suitable for regular metal, plastic and glass surfaces
• High-gloss protection - reliable surface protection for high-end electronics CNC processes
• Automation friendly - designed for high-efficiency automated dispensing in mass production

Technical Specifications

Product Applications

3769A is engineered for high-gloss temporary protection during CNC machining of high-end electronic components. Typical applications include:

• CNC high-gloss protection - applied to machined surfaces such as aluminum alloy frames, housings and structural parts to protect the high-gloss finish from scratches, fingerprints, dust, cutting fluid and mild oxidation during subsequent handling and processing
• Metal parts - regular metals including aluminum alloy, stainless steel and other precision-machined metal components
• Plastic parts - PC/ABS housings and precision plastic components requiring temporary surface protection
• Glass components - glass panels and precision glass parts that need clean, residue-free protection
• Automated dispensing lines - fully compatible with robotic and automatic dispensing systems for high-efficiency mass-production protection
• Easy removal - when protection is no longer needed, the film peels off in one piece without residue, restoring the original high-gloss surface

Frequently Asked Questions

1. What is 3769A UV adhesive mainly used for?
   It is used as a temporary high-gloss protective coating for high-end electronic components during CNC machining, protecting parts from scratches, contamination and oxidation. After processing, the film is peeled off easily without residue.
2. Which materials can 3769A be applied to?
   It is compatible with the regular metal, plastic and glass surfaces commonly used in electronics manufacturing, such as aluminum alloy, stainless steel, PC/ABS plastics and glass panels.
3. What curing energy does 3769A require?
   It cures under UV light with an energy dose of about 800 mJ/cm². The fast curing response makes it well suited to high-efficiency automated production lines.
4. Does 3769A leave any residue after peeling?
   No. The cured film is soft (35 Shore A) yet tough, and is formulated to peel off cleanly in one piece without leaving adhesive residue on the substrate surface.
5. Is 3769A solvent-free and environmentally friendly?
   Yes. 3769A adopts a 100% solvent-free formulation, meeting environmental and workplace safety requirements while avoiding solvent-related shrinkage or surface defects.
6. How should 3769A be stored and what is its shelf life?
   Keep the container sealed and store at 8-28°C in a cool, dry place away from direct sunlight and UV sources. Under proper storage conditions, the shelf life is 12 months. Available in 50g and 300g packages.

Packaging & Storage

Available in 50g and 300g packages. Store in a sealed container at 8-28°C, away from direct sunlight and UV exposure. Shelf life: 12 months.