Abstract
The effect on using PVA-converted starch and latex as pigmented coating adhesive when mixed in various ratios was studied. PVA with medium viscosity was used, and oxidized starch and hydroxyethylated starch (HES) were used for the converted starch.
The flow properties of the coating colors were modified considerably by using together PVA and converted starch. Particularly, the conveging capacity of the coating colors is improved markedly by using a PVA-converted starch blending ratio of 50 : 50 and almost no “orange peel” pattern or ridges on the coated surface was observed.
In case of coated paper, smoothness (both macro and micro), porosity and gloss which are superior to those when PVA and converted starch are used independently were obtained when a mixing ratio of 75 : 25 was used and the synergism of both was observed.
The author also made comparative studies on the surface properties and printability of this coated paper and 5 kinds of commercial coated papers.
