HALOGENFREE FLAME RETARDANT HIGH （无卤阻燃高）.pdf

HALOGEN-FREE FLAME RETARDANT HIGH TEMPERATURE MATERIALS FOR LEAD-FREE SOLDERING APPLICATIONS Jay Amarasekera, Bo Liu, Herve Cartier, Alexis Chopin GE Industrial, Plastics 475, Creamery Way Exton, Pennsylvania ABSTRACT When designing plastics for switches and connectors, The recent push for environmentally friendly halogen-free several factors need to be taken into consideration. The and lead-free products has resulted in significant changes in parts designed need to have tight tolerance in dimensions, so the design of polymeric materials used in the electronics that those can be assembled precisely with other industry. The new products are required to be halogen and components. In addition, the typical snap-fit contact red phosphorus free, exhibit improved flame retardant assembly requires the materials to have high modulus and properties, and withstand peak reflow temperatures of sufficient ductility. This can be accomplished by adding 235°C to 260°C. The polymer composites described in this different types of reinforcing fillers to the polymers and study are made from polyphenylene sulfide (PPS), balancing shrinkage properties during injection molding. polyphenylene oxide (PPO), Polyphthalamides (PPA) or The proper balance of reinforcing fill