EMISSIONS FROM FLAME RETARDED AND NONFLAME RETARDED CIRCUIT BOARD LAMINATES

摘要

Recently a project focusing on emissions from circuit board laminates was completed as part of arnUS Environmental Protection Agency (EPA) Design for the Environment (DfE) project.1 In this projectrnthe emissions from flame retarded and non-flame retarded circuit board laminates were studied with the usernof the cone calorimeter and a unique emissions capture system. Four different laminate chemistriesrnincluding brominated flame retardant, two types of non-halogenated flame retardant (assumed to bernphosphorus based), and a non-flame retardant system were tested under low flow conditions (15 L/s) andrntwo different heat fluxes (50 kW/m2, 100 kW/m2) via cone calorimeter. Along with the laminates, circuitrnboard components were homogenized and added to the single laminates to see how those components, inrnpowder form, would affect emissions. The results collected found that all of the samples releasedrnpollutants of concerns and therefore proper incineration / emission capture techniques are needed whenrnconducting precious metal recovery from electronic circuit boards. The laminate chemistry did affectrnresults, but the absence of flame retardants did not always mean that lower emissions would be detected.rnThis paper will highlight the results and discuss the modified emissions train and experimental methodsrnused to collect the data.