Environmentally Friendly PET Polyester Resins Used in the Wet-end at Neutral-Alkaline Papermaking Conditions

摘要

Two environmentally friendly, water-born polyesters were used with rosin as internal sizes in the wet-endrnat neutral-alkaline papermaking conditions. Two different furnishes were tested. The premixing process,rnmixing two or more chemicals together before adding to pulp or stock, was studied. The results show thatrnthe premixing process improved the polyester sizing efficiency. The mechanism of the premixing processrnwas also investigated. A new wet end process is described that shows improved physical properties.