Polyethylene wax emulsion and polyvinyl alcohol (PVA) are commonly used water-based additives in the paper industry. Can they be added together and used in the paper system?
Polyvinyl Alcohol (PVA): An organic compound, white plate-like, flocculent, or powdery solid with no odor. PVA has strong adhesion to cellulose and exhibits good film-forming properties, resulting in high film strength. In the paper industry, PVA is primarily used as a surface sizing agent, pigment binder, and refining machine additive. It improves the paper's abrasion resistance, fold resistance, tear strength, gloss, smoothness, and print adaptability.
Polyethylene wax emulsion is a non-ionic emulsion that is tasteless, non-corrosive, acid-resistant, alkali-resistant, hard water-resistant, highly water-soluble, and exhibits good stability. It can be diluted with water in any proportion without layering, creaming, or agglomerating. The emulsion has a long shelf life, high solid content, and good dispersibility.
Experimental evidence has shown that there is generally no chemical reaction between polyethylene wax emulsion and polyvinyl alcohol (PVA). PVA solutions are highly stable and belong to water-soluble inert polymers, which do not interact with most solvents except boronic acid compounds, and they do not react with almost all non-polar waxes or neutral organic compounds.
Therefore, in the paper system, polyethylene wax emulsion can be mixed and used with polyvinyl alcohol, and the performance is also very stable.
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