Wet strength agents (WSA) are important functional additives in papermaking. Since neutral manufacturing became a standard in industry, Polyamidoamineepichlorohydrine (PAE) resins have been the most relevant class of wet strength agents. Consumer tissue products represent the biggest group of wet strengthened papers today.
is new type wet strength agent of PPE (Polyamide Polyamine-Epichlorhydrin), it can be adsorbed on fibre in pulp, it can raise paper wet strength by forming thermo-
setting resin and permanently fixed in fibre, after it reacts to fibre in dryer section. It can obviously raise paper wet and dry strength by forming net structure
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