Wet strength agents are mainly used in the papermaking industry. The usage of different types of paper varies greatly, such as toilet paper, fruit bag paper, cardboard, wettable surface paper, etc. Currently, PAE wet strength agents are mainly used as wet strength agents. There are also many production factories, most of which are small-scale, but their product quality is good.
The content of wet strength agents is mostly 12.5%. Weakly acidic. It appears as a slightly yellow, transparent, and viscous liquid.
PPE (PAE) wet strength agent, also known as polyamide epoxy chloropropane resin, is a water-soluble, cationic, thermosetting resin that does not contain formaldehyde polymers. It is non-toxic and odorless, and can be produced under neutral, slightly alkaline, and acidic conditions. Its pH value is widely applicable; The strengthening effect of PPE wet strength agent on wood pulp is higher than that of grass waste paper. With the increase of beating degree, the surface area of pulp fibers increases, and the adsorption capacity of wet strength agent is greater. The dry and wet strength of the resulting paper is correspondingly improved; It has a strong adsorption effect on negatively charged fillers, adhesives, and fine fibers, and has a significant retention and filtration aid effect during the papermaking process; The amount of addition depends on the wet strength requirements of the paper. Excessive addition can lead to pulp flocculation, affecting the uniformity of papermaking and the reuse of damaged paper. In severe cases, it can cause hair and cylinder sticking; Different paper weights have a certain impact on the retention rate of PPE wet strength agents; After adding PPE, the wet strength of the paper after drying only reaches about 70%, and it takes 7-15 days of maturation to reach the maximum wet strength; Using PPE can increase dry strength by about 15-20%; The retention and filtration effects are significant, and the initial retention rate of fibers can be increased from around 70% to over 80%. The clarity of white water is also significantly improved; It has a synergistic effect on AKD and can reduce the dosage of AKD; Improved paper folding resistance, surface strength, and lateral expansion rate, and also had a good effect on reducing wet paper web breakage during paper machine operation.