Kaolin-Filled Styrene-Butadiene-Based Dispersion Coatings for Paper-Based Packaging: Effect on Water, Moisture, and Grease Barrier Properties

Dispersion coating may represent an alternative technology to extrusion coating, currently dominating the market of coated paper-based packaging. Being processed as inks, dispersion coatings can be applied with conventional equipment, achieving lower dry coat grammages. In this work, two styrene-butadiene-based (Tg1 ? 0 °C; Tg2 15 °C) filled different amounts kaolin were developed and rod-coated on paper substrates. The samples tested for water, moisture, grease barrier properties. Kaolin-containing formulations showed moisture low g/(m2?day), well higher than 24 h. best formulation involved 20% by weight kaolin, whereas detrimental water barrier, beneficial slightly Benchmarked commercial grades, kaolin-filled strongly improved yet similar barrier.