Effect of Pigment/Binder on Cotton Fabrics by InkJet Inks. I. Pigment Treatments by Surfactant Dispersion and Surface Modification

摘要

Two sets of pigmented inkJet inks with various pigment-to-binder ratios (1/0.5, 1/1.0, 1/0) were prepared. The pigments were surface modified or surfactant dispersion treated. The first set of 4 color pigments was dispersed by a surfactant, stabilization of the surfactant dispersed pigment occurs after adsorption of a thin layer of surfactant onto the pigment surface, while the second set was applied by a modified surface, the pigments were chemically pre-modified so that they acted with the ink for more effective surface dispersion. The inks were prepared by a slow mix of the pigment with polyacrylate binder in ethylene glycol and glycerin solvent and some additives to create stable inks. Ink viscosity, pH and surface tension were measured and the inks were printed on cotton fabrics that were padded with an aqueous dispersion of poly(vinyl alcohol) and alumina. All prints with different ratios gave acceptable air permeability and stiffness. Increasing the pigment/binder ratios, color gamut, and crockfastness were greatly improved. The ink formulated from surfactant dispersion gave better prints based on overall qualities.