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A capillary viscometer developed to measure the apparent shear viscosity of inkjet inks at high apparent shear rates encountered during inkjet printing is described. By using the Weissenberg–Rabinowitsch equation, true shear viscosity versus true shear rate is obtained. The device is comprised of a constant-flow generator, a static pressure monitoring device, a high precision submillimeter capillary die, and a high stiffness flow path. The system, which is calibrated using standard Newtonian low-viscosity silicone oil, can be easily operated and maintained. Results for measurement of the shear-rate-dependent viscosity of carbon-black pigmented water-based inkjet inks at shear rates up to 2×105 s-1 are discussed. The Cross model was found to closely fit the experimental data. Inkjet ink samples with similar low-shear-rate viscosities exhibited significantly different shear viscosities at high shear rates depending on particle loading. [ABSTRACT FROM AUTHOR]

The article discusses a study on drop impaction on surfaces. In the study, impaction on smooth solid substrates of drops formed by the drop-on-demand (DOD) inkjet printing method was investigated over a wide range of impaction speeds. Drops were generated using a piezoelectric actuated inkjet printhead and millimeter-scale drops were generated using a dripping method. Glass slides, thermal oxidized silicon wafer, and three self-assembled monolayers (SAMs) on gold coated silicon wafers were used as substrates for drop impaction.

A single-end sizing process was developed to eliminate the problems associated with the traditional sizing method. By keeping the yarns separated in slots in the single-end sizing apparatus and drying them individually, less damage to the yarns occurred. In this paper, the process and device developed for single-end sizing are described and the properties of single-end sized yarn are compared with unsized yarn and commercially sized yarn. [ABSTRACT FROM AUTHOR]

This paper is concerned with the image quality of lines that were inkjet printed on polyester woven fabric. Lines (ideal width of 0.1 mm) running in the warp and filling directions were inkjet printed on different fabrics, and print quality (line width, edge blurriness and edge raggedness) was assessed. The effects of fabric structural parameters (including fabric, yarn and fiber parameters), finishing (type and pick-up), and ink type on line image quality are discussed. Image quality depended on fabric construction, particularly for unfinished fabrics. The satin fabric had the worst image quality while the image quality on the plain fabric was best. Finishing can improve image quality; however, the type of finish was very important. Acrylic resin finish improved printing quality significantly, but results with polyurethane resin-finished fabric were not much better than for unfinished fabric. A volatile ink reduced wicking and improves line image quality; thus, image quality using the alcohol base ink was better than for the oil or glycol based inks. [ABSTRACT FROM AUTHOR]

A study in which energy measurements were made on a continuous carpet dyeing range is discussed. One objective of the study was to determine the energy con sumption per mass of carpet dyed on a typical range. To achieve this, the two kinds of energy, thermal and electrical, that are consumed in the continuous process were measured on the range. A second objective of the investigation was to identify the energy conservation potential of each step of the continuous dyeing process. Mea surements were made so that thermal balances on the components of the Kuster Range could be generated. [ABSTRACT FROM PUBLISHER]

Presents the abstract of the research article titled "Toners for Xerographic Textile Printing Produced by Means of Thermally Induced Phase Separation," by Heungsup Park and Wallace W. Carr.