Influence of Starch Molecular Weight and Sodium Alginate on Silicone Holdout for Release Papers
Date of Award
Master of Science
Chemical and Paper Engineering
Paper Engineering, Chemical Engineering and Imaging
Dr. Margaret K. Joyce
Dr. Thomas Joyce
Dr. Alexandra Pekarovicova
Masters Thesis-Open Access
This research was focused on determining the influence of applying one type of potato starch of various molecular weights on silicone holdout. Also, combinations of potato starch with a rheology modifier, sodium alginate, of low, medium, and high molecular weight were studied. The base paper employed was a commercially available paper generally used to manufacture release papers.
Sizing with low molecular weight potato starch is more effective for silicone holdout than sizing with high molecular weight potato starch. This study showed that the paper sized with low molecular weight potato starch has a smoother surface, lower permeability, and a smaller average pore size compared to paper sized with the high molecular weight potato starch. Thus, this paper provides better silicone holdout than was achieved by high molecular weight potato starch.
The addition of alginates to the starch solution decreased Gurley porosity significantly. In addition, the alginates decreased the average pore size; the decrease was more evident with the lower molecular weight alginates. Due to more favorable paper properties such as lower permeability, lower water penetration rate, smaller : average pore size, the silicone agent is better retained on the surface of the paper. This could lead to decreasing the amounts of silicone applied to the sized paper, resulting in lower costs for silicone treatment.
Suchy, Peter, "Influence of Starch Molecular Weight and Sodium Alginate on Silicone Holdout for Release Papers" (2001). Masters Theses. 4950.