When the phenomenon of LED curing, the lighting factory first investigation is the lamp production, storage, electricity aging environment, but ignored the built-in power lamps. LED power there are twenty or three kinds of raw materials, which may also contain sulfur, chlorine and bromine elements. In a closed, high temperature environment, these sulfur, chlorine and bromine elements may evaporate into the gas and corrode the LED light source. So LED lighting factory in the purchase of power to be required when the power supply manufacturers to provide LED power without sulfur identification report.
LED power supply without sulfur identification report, is to check whether the LED power supply containing sulfur, chlorine and bromine on the LED light source of harmful elements of the report. The report is essential for the lighting plant, because the silver light source silver layer easily with sulfur, chlorine, bromine gas reaction, respectively, to generate black silver sulfide, silver chloride, silver bromide, resulting in light beads hair Black failure.
In the LED power supply may be sulfur / chlorine / bromine materials are:
1.PCB board: the production of circuit boards on the market have a certain amount of sulfur residue, although the PCB circuit board manufacturers in the process process will clean the plate to eliminate sulfur chemical solvent residues, but the general production process more difficult Clean and clean.
2. Sulfur-containing rubber power cord and rubber insulation packaging plastic: vulcanized rubber can be -65 ~ 250 ℃ temperature range for a long time to maintain flexibility, and has excellent electrical and chemical stability, waterproof, ozone resistance, weather resistance Aging, coupled with the use of simple, process applicability, and therefore widely used in the electronics industry, as the electronic components of the coating, potting, packaging materials.
Brings, such as PBB, PBDE, TBBP-A, PCB, hexabromododecane, tribromophenol, short chain chlorinated paraffin, etc. are often used as flame retardants for printed circuit boards, Shell, plastic and other materials. When the power supply heat, these materials will evaporate a halogen-containing gas, halogen-containing gas and water vapor, will produce corrosive harmful gases, causing corrosion on the LED.