Among the most prominent are Alkenyl Succinic Anhydride (ASA) and Alkyl Ketene Dimer (AKD). Both serve the crucial purpose of imparting hydrophobicity to paper, but they differ significantly …

The sodium salt of ASA can be complexed with alum in a similar manner to resin acids to size in acid papermaking. Furthermore, commercial ASA products are also being used in acid …

Today, common internal sizing chemicals (e.g., alum/rosin, AKD [Alkyl ketene dimer] and ASA) are introduced into a pulp slurry at the wet end during the papermaking process. Alum/rosin …

Jul 7, 2023 · ASA has a higher reactivity to cellulosic fiber compared to AKD. Moreover, ASA has also been reported to be applied in acidic paper-making conditions .

Jun 6, 2022 · The CA of the hand sheets remarkably increased from 0° to more than 80° when the dosage of AKD in AD increased from 0.05 to 0.2%, as shown in Figure 4 b, which seemed to …

Like stearic acid and AKD, ASA vapour can introduce significant sizing to cellulose. The reaction is temperature dependent and may be interpreted as Arrhenius behaviour.

Feb 20, 2018 · It is well known that alkenyl succinic anhydride (ASA), an alkaline sizing agent, when applied to cellulosic fibers will impart a resistance to the absorption of water. High …

Cellulose reactive sizes, like alkyl ketene dimer (AKD) and alkenyl succinic anhydride (ASA), are applied to a neutral or alkaline furnish in the form of a size emulsion.

AKD was in liquid form at all the drying profiles applied and thus should easily have spread over fiber surfaces. Drying of papers using the high-to-low or low-to-high profile resulted

Neutral sizing technologies like AKD and ASA offer clear advantages—supporting alkaline papermaking, improving hydrophobicity, enabling calcium carbonate fillers, and meeting …