Strategies for Economical Alternatives for Wax Replacement in Packaging, 2007 Coating & Graphic Arts Conference

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Water resistance for packaging applications by aqueous polymer coatings is considered with emphasis on improving the economics necessitated by recent escalating costs and unavailability of paraffin wax for coatings. Studies are reported of incorporation or blending of various pigments towards waterproofing linerboard along with changes in relevant physical properties. Impregnation of polymer/pigment bends is observed to increase strength properties substantially. Observations are made of surface flame treatment and curtain coating which can lower the coating basis weight required to attain a level of water resistance. Mention is made of the potential for electrospinning to supplant conventional coating technologies.