FR-4 copper clad laminate has always maintained its leading position in the production of epoxy resin copper clad laminate. It is reported that the main reason is that this product has excellent comprehensive performance and flame retardancy, and has a good function price ratio, which is deeply welcomed by users. 1. FR-4 resin glue solution (1) resin glue solution formula in the epoxy resin copper clad laminate industry, FR-4 copper clad laminate has been produced for many years, and the resin glue solution formula is basically the same. (2) Preparation method
1) Dimethyl formamide and ethylene glycol methyl ether are stirred and mixed to form a mixed solvent.
2) Add dicyandiamide and stir to dissolve.