Overview
Vacuum Coating Stripper is a chemical formulation engineered to dissolve or lift vacuum-deposited metallic or non-metallic coatings from substrates such as glass, plastics, or metals. It is critical in industries requiring rework or recycling of coated components without damaging the base material. The product is tailored to target specific coatings (e.g., gold, silver, aluminum) used in PVD (Physical Vapor Deposition) or CVD (Chemical Vapor Deposition) processes. Its efficacy depends on pH, temperature, and immersion time, with advanced formulations offering minimal environmental impact.
Physical and Chemical Properties
Most vacuum coating strippers are aqueous or solvent-based liquids with controlled viscosity to ensure even application. They typically exhibit neutral to mildly alkaline pH to prevent substrate corrosion. Modern variants are often biodegradable and comply with RoHS/REACH regulations. Key performance metrics include stripping speed (usually 5-30 minutes), selectivity (coating-only removal), and compatibility with sensitive substrates like polycarbonate or optical lenses. Additives may include chelating agents to stabilize dissolved metals for recovery.
Main Applications
In electronics, strippers remove gold or aluminum coatings from defective PCBs for rework. Optical industries use them to reclaim lenses or mirrors by stripping anti-reflective layers. Decorative applications include refurbishing automotive trims or jewelry. The automotive sector relies on strippers for recycling headlight reflectors, while aerospace uses them to repair turbine blade coatings. Emerging applications include solar panel manufacturing, where selective coating removal optimizes cell efficiency.
Safety and Storage
Though less hazardous than traditional acid strippers, precautions are essential. Ventilation is required to avoid vapor buildup, and secondary containment is recommended for storage. Spent solutions often contain heavy metals, requiring licensed waste treatment. Storage life is typically 12-24 months in HDPE containers at 10-30°C. Freezing or high temperatures may degrade performance. Incompatible materials include strong oxidizers and certain plastics like PVC.
B2B Procurement Guide
Buyers should prioritize suppliers with ISO 9001/14001 certifications. Request technical datasheets detailing substrate compatibility tests, stripping rate data, and MSDS. Bulk purchases (200+ liters) commonly reduce costs by 15-30%. For precision industries, opt for low-residue formulations to avoid post-strip cleaning. Evaluate vendor support for custom blends if handling unique coatings like ITO (Indium Tin Oxide) or multilayer stacks.
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