Extension of TiO2 in Coated Paperboard Using a Performance Optimization Model, PaperCon 2013

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There are a multitude of different pigments, binders and additives that are used to formulate paper coatings. Reducing the levels of expensive pigments like TiO₂ is a constant driver for coated paperboard producers. However, finding the balance between cost and performance can be difficult. In this study, a Design of Experiment approach was taken with a new TiO₂ replacement pigment to achieve significant cost savings without sacrificing performance of the final coated board. A co-calcined clay with TiO₂ was used to reduce TiO2 and show equivalent performance cost effectively. The final coated board brightness was used to model the input parameters as predictors of performance. The model, so developed, can be a useful tool for coated paperboard manufacturers to optimize their formulations by selecting formulation inputs to obtain desirable performance and cost.