C-PNVF dry tensile enhancement effect in paper

The addition of cationic polyvinylformamide (C-PNVF) has the same effect on the dry tensile strengthening effect of wood pulp and reed pulp. With the increase of C-PNVF addition, the dry tensile strength increases first and then decreases.

When the addition amount of C-PNVF is 0.6%, the paper pulp strength enhancement effect is the best, and the tensile strength at this time increases by 24.83%, while the reed pulp reaches 0.4% when the added amount is reached. Best, its tensile strength increased by 32.10%. Experiments show that proper addition of c-PNVF can effectively improve the tensile strength of paper. When the addition amount is small, the tensile strength can be improved to a certain extent, but the desired effect is not achieved. When the addition amount is too much, the remaining C-PNVF after the saturation adsorption generates flocculation. This can cause the paper's uniformity and tensile strength to drop, which is why the curve in the graph drops. Due to the high content of short fibers in the reed pulp, the large number of small components, the large specific surface, and the strong adsorption capacity, the C-PN-VF has a stronger effect on the resilience of the reed pulp.