Colloidal Pigment Dispersion for Corrugated Board
The flexographic printing of corrugated board in the United States accounts for 95% of the corrugated market. There are three major segments within the market: high quality, medium quality and low cost. Emulsion synthesized polyelectrolytes are used as pigment dispersants and letdown vehicles in the later two segments. The design of polymeric dispersants for these applications requires the understanding of the colloidal character of the polyelectrolyte and the viscosity profile as functions of pH. A series of five polyelectrolytes were synthesized. These copolymers were characterized and formulated as dispersants and letdown vehicles in carbon black inks. It was found that the molecular weight and the Tg of the copolymers were important variables in the design for maximizing the jetness in the formulation of a corrugated ink. An attempt was made to correlate the printing ink properties and performance parameters with various properties of the copolymers usually used as a binder in the printing processes.
KeywordsShear Rate Pigment Particle Pigment Dispersion Viscosity Profile Hysteresis Area
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- 3.Nishda, S., Kast, H., El-Aasser, M.S., Vanderhoff, J.W., “Alkali Swelling Behavior of Carboxylated Latexes 1.”, EPI, Lehigh Univ., (1979).Google Scholar
- 4.Nishda, S., Kast, H., El-Aasser, M.S., Vanderhoff, J.W., “Alkali Swelling Behavior of Carboxylated Latexes 11.”, EPI, Lehigh Univ., (1979).Google Scholar
- 5.Shinoda, K., Tamamushi, B., Nakagawa, T., Isemura, T., Colloidal Surfactants, Academic Press, (1983).Google Scholar