allows the de watering aid to improve process runnability in at least one embodiment the dewatering aid carries the same charge as the second flocculating agent for treating the filler particles when the two carry the same charge the filler additive is less likely to adsorb wet strength aid wet web strength additive or drainage aid on its surface dewatering aids encompassed by the invention include any one of the compositions of matter described in u s pat no 4 605 702 and us patent application 2005 0161181 a1 and in particular the various glyoxylated acrylamide dadmac copolymer compositions described therein an example of a glyoxylated acrylamide dadmac copolymer composition is nalco 63700 available from nalco company naperville ill 60563 other examples are amine containing polymers including dallylamine acrylamide daa acam copolymers and polyvinylamines pvam in at least one embodiment the fillers used are pcc gcc and or kaolin clay in at least one embodiment the fillers used are pcc gcc and or kaolin clay with polyacrylic acid polymer dispersants or their blends the ratio of dewatering aid relative to solid paper mat can be 3 kg of additive per ton of paper mat the foregoing may be better understood by reference to the following examples which.