Statistical modeling and sizing determination guides for dispersed rosin sizes

Abstract

Four cationic dispersed rosin sizes were studied in terms of their performance when pH, temperature, and water hardness were varied. Three of the sizes were based on fortified rosin with different concentrations of fumaric acid, and the fourth size was based on esterified rosin. Statistical tools are used to refine and simplify an earlier model proposed by Nitzman and Royappa, who first examined the relationship between sizing and the factors of pH, temperature, water hardness, and fortification. The simplified models provide some insight into the differences between esterified sizes and fortified sizes in terms of paper sizing, Based on the algorithmic modeling approach, guidelines are proposed for choosing different levels of pH, temperature, and water hardness for use with different rosin sizes.

Publication Title

Tappi Journal

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