POLYEM HW alcohol-ether carboxylic acid is a surfactant that insets polyoxyethylene groups between hydrophilic and hydrophobic groups. It has the advantages of both anionic and non-ionic surfactant, overcomes the shortcomings of bad hard water resistance and bad dispersing ability of non-ionic surfactant calcium soap, and has excellent electrolyte stability in acid-base environment. It can be used as coemulsifier in cutting fluid. Solve the problem of oil and soap extraction.