The white surface is a kind of single coated paper mixed with chemical materials as kaolin and adhesives.

The results shows that further treatment of superabsorbent composite products containing kaolin is easier than that of pure polyacrylic acid salt superabsorbent.

By putting magnetic particles, PFC and PAM into turbid water made up by kaoline to carry on magnetic flocculating, optimum parameters and mechanism of forming magnetic composite flocs were studied.