LED power supply affects the vulcanization of LED

There are twenty or thirty kinds of raw materials in the Led Power Supply , which may also contain sulfur, chlorine and bromine. In a closed, high temperature environment, these sulfur, chlorine and bromine elements may volatilize into gases and corrode the LED source. Therefore, LED lighting factories must provide Power Supply manufacturers with sulfur-free identification reports for Led Power Supplies when purchasing power.

The LED power supply sulfur-free identification report is an identification report for checking whether the LED power supply contains harmful elements such as sulfur, chlorine and bromine. This report is very important for lighting factories because the silver-plated layer of LED light source reacts easily with gases containing sulfur, chlorine and bromine to form black silver sulfide, silver chloride and silver bromide, resulting in lamp beads. Black is invalid.

Materials that may contain sulfur/chlorine/bromine on the LED power supply are:

1.PCB board: The circuit board produced in the market has a certain content of sulfur residue. Although the PCB circuit board manufacturer will clean the board in the process process and eliminate the residue of sulfur-containing chemical solvent, the ordinary production process is difficult to complete. Cleaned.

2. Sulphur-containing rubber power cord and rubber-based insulating packaging plastic: vulcanized rubber can maintain elasticity for a long time in the temperature range of -65~250 °C, and has excellent electrical properties and chemical stability, waterproof, ozone resistant and weather resistant. Aging, combined with simple usage and strong process applicability, is widely used in the electronics industry as a coating, potting and packaging material for electronic components.

3. Printed circuit board, outer casing, plastic: halogen compounds such as PBB, PBDE, TBBP-A, PCB, hexabromododecane, tribromophenol, short-chain chlorinated paraffin, etc. are often used as flame retardants in printed circuit boards. Shell, plastic and other materials. When the power source is heated, these materials will volatilize the halogen-containing gas. When the halogen-containing gas is combined with water vapor, it will generate corrosive harmful gases and cause corrosion to the LED.