Flux for Resin Flux Cored Solder, Flux for Flux Coated Solder, Resin Flux Cored Solder and Flux Coated Solder

摘要

A flux for a resin flux cored solder contains 30% or more by mass but 80% or less by mass rosin ester and 5% or more by mass but 15% or less by mass activator. The total content ratio of base materials including the rosin ester is preferably equal to or more than 85% by mass but equal to or less than 95% by mass.