It is one of advanced wet strength agent for paper industry in recent years,soluble in water, cationic and thermal resin, that is polyamide polyamine epichlorohydrin resin, which is called PPE resin. It is not one of polymer of formaldehyde, it is non-toxic, odorless and extent of pH value for applications.it is suitable to make paper under neutural and slight alkali conditions, also for acid condition, moreover, the wet strength porformance is much better than urea formaldehyde and melamine resin.