Dynamic Interactions of Pigment-Based Inks on Chemically Modified Papers and Their Influence on Inkjet Print Quality

Abstract

Research on paper surface modification, paper properties, paper–ink interactions, and their influence on inkjet print quality are currently subjects of great interest. In this study, dynamic interactions between aqueous pigment black ink and modified paper and their effect on print quality are discussed. Formulations of starch and blends of starch and poly(diallyldimethylammonium) chloride or polyoxyethylene (100) stearyl ether were used on base paper. Modified papers were printed on two printers. The paper performance is discussed in terms of surface energy, dispersive and polar components, and air permeability given the ink spreading and absorption. Results showed that paper modified with a blend of starch and poly(diallyldimethylammonium) chloride improves inkjet print quality. This modified paper showed higher black print density and lower line width, raggedness, intercolor bleed, and dot gain because of the spreading–absorption balance arising from the low surface energy and polar component.

Embossing Pressure Effect on Mechanical and Softness Properties of Industrial Base Tissue Papers with Finite Element Method Validation

“…First, we proceeded to understand the densification effect of the sheet by compressing both base tissue paper samples with a flat steel plate and a rubber plate with a hardness of 60.3 ± 1.21 shore A (10 measurements along the rubber plate with a durometer PCE-DDA equipment), and the pressure was varied for values from 2.0 to 3.6 bar in 0.4 bar increments. In this procedure, the study of the liquid interaction with the different densified paper structures to evaluate spreading dynamics was also considered through an optical system [19], which has been used in previous studies [20][21][22][23]. The system works by ejecting droplets of approximately 0.5 µL of dyed water toward the surface of the densified paper samples and, simultaneously, a set of images of the droplets' interaction was registered during a period of 3.0 s.…”

Enhancing ink adhesion of specialty paper using an interpenetrating polyvinyl alcohol-blocked polyurethane polymer network sizing system

“…Due to the highly crosslinked structure of our composite sizing system, the resultant sizing samples had higher cross-linking density and was expected to exhibit better mechanical performance, which was also essential factor of ink adhesion for specialty paper. [47][48][49] The basic mechanical properties in terms of tensile index, tearing index and folding resistance were tested (Fig. 9).…”

Ink-jet printed planar electrochemical cells

“…If the printed liquid is wetting the surface too much, excessive positive dot gain or even pattern bleeding [24] may occur. On the other hand, poor wetting of substrate by the printed ink results into spontaneous shrinking of the printed ink (negative dot gain), or the formation of a bumpy surface resembling the texture of an orange peel [25][26][27].…”