Hydroxyethylcellulose- non-ionic, water soluble polymer
Function:
Improves bonding and coating uniformity of the flux to the core. Critical performance characteristics include increased viscosity, lubrication, and shear-thinning behavior under pressure. After the extrusion process, it immediately recovers its viscosity, preventing separation or inhomogeneity of the flux. It provides a highly plastic, smooth coating that helps counteract imperfections during drying.

Carboxymethylcellulose- purified sodium salt of carboxymethyl cellulose; water-soluble, anionic polymer
Function:
Improves bonding and coating uniformity of the flux to the core. Critical performance characteristics include increased viscosity, lubrication, and shear-thinning behavior under pressure. After the extrusion process, it immediately recovers its viscosity, preventing separation or inhomogeneity of the flux. It provides a highly plastic, smooth coating that helps counteract imperfections during drying.