WET STRENGTHENED FIBER PRODUCTS, WET STRENGTHENING RESINS, AND METHODS FOR MAKING AND USING SAME

摘要

Wet strengthened fiber products, wet strengthening resins, and methods for making such wet strengthened fiber products and wet strengthening resins. The wet strengthened fiber product can include a fiber web and an at least partially cured wet strengthening resin, which prior to at least partially curing, the wet strengthening resin can include a polyamide-epihalohydrin (PAE) resin and a cationic styrene maleimide (SMI) resin. The PAE resin can include a reaction product of a polyamidoamine and an epihalohydrin and the cationic SMI resin can include a reaction product of a styrene maleic anhydride (SMA) copolymer and an amine. The wet strengthened fiber product can include the wet strengthening resin in an amount of about 0.05 wt % to about 5 wt %, based on a dried weight of the wet strengthened fiber product.

主权项

1. A wet strengthened fiber product, comprising:
a fiber web; and an at least partially cured wet strengthening resin, wherein, prior to at least partially curing, the wet strengthening resin comprises:
a polyamide-epihalohydrin resin comprising a reaction product of a polyamidoamine and an epihalohydrin; anda cationic styrene maleimide resin comprising a reaction product of a styrene maleic anhydride copolymer and an amine compound, a weight average molecular weight of about 500 to about 200,000, and a styrene to maleimide molar ratio of about 1:1 to about 5:1;wherein the cationic styrene maleimide resin is present in the wet strengthening resin in an amount of about 5 wt % to about 95 wt %, based on the combined weight of the polyamide-epihalohydrin resin and the cationic styrene maleimide resin; andwherein the wet strengthening resin is present in the wet strengthened fiber product in an amount of about 0.05 wt % to about 5 wt %, based on a combined weight of the polyamide-epihalohydrin resin and the cationic styrene maleimide resin relative to a dried weight of the wet strengthened fiber product.