Dyeing in Open-Width and Rope form.

Bruckner has modified its Supraflor winch unit for piece dyeing carpets. Different versions of the machine offer open width or rope dyeing. this fast and environmentally friendly processing system accommodates carpet widths of 4.2 and 5.2 millimeters, and can be customized for 50-250, 240, 300, 360, or 400 linear meters. An optional expan..

Phosphatidylcholine Unilamellar Liposomes as Vehicles for a 1:2 Metal-Complex Dye in Wool Dyeing.

Researchers studied the use of large unilamellar liposomes of 400 nanometers as carriers of a 1:2 metal-complex dye for untreated wool fibers. The study used liposomes made from egg phosphatidylcholine containing C.I. Acid Yellow 129 (week polar). Total l

Low Temperature Wool Dyeing Kinetics.

Researchers studied the action of two commercial nonionic auxiliaries on the aggregation of two acid dyes in wool dyeing. Experiments focused on the influence of the concentration of the auxiliary products, pH, and temperature on the dyeing kinetics. The nonionic auxiliary products increased the dye uptake rate of the fiber. 14 refs.

Dyeing of Solvent-Pretreated Polyester.

Researchers pretreated polyethylene terephthalate (PET) and polybutylene terephthalate (PBT) filaments with different solvents under identical conditions to observe the effect of different solvents on such properties as swelling, moisture regain, and dyeability. Solvents with dispersion solubility parameter values similar to those of the ..

Influence of the Spinning Variables on the Dyeing Behavior of Polyester Microfibre Yarns.

Researchers spun 0.9 dtex polyester microfiber in a ring spinning frame under different processing conditions. Taguchi's method allowed researchers to test the effects of traveler speed, type of traveler, antiballooning, doffing, and drawing on polyester microfiber. Results determined the tinctorial behavior of dyes on the resulting yarns..

Dyeing Behavior of Lenzing Lyocell Fibres.

Researchers used Levafix and Sirius dyes to compare Lenzing's lyocell fibers with viscose, modal, and cotton fibers. Tests examined substantivity, fixation behavior, and color yield. Despite a very high dye yield, the dye uptake rate of the lyocell fibers proved similar to that of viscose fibers.

Prospects of Jute.

Because of their lignin content, jute fibers turn yellow after prolonged exposure to light. Bleaching removes lignin present in the surface layer of jute fibers. A more complete removal of lignin would result in a significant loss of strength. Bleached ju

Development of Printing and Dyeing Processes for an Ecological Acceptable Polypropylene Formulation.

Recent research on the compatibility of polypropylene with other polymers led to the development of a special polypropylene formulation that absorbs disperse dyes. This research project aims to adapt the dyeable polypropylene for processing into fibers possessing different degrees of fineness and good absorptivity of disperse dyes, define..

Neuro-fuzzy modelling of spectroscopic data. II. Dye concentration prediction

An adaptive network-based fuzzy inference system, ANFIS, has been used for predicting dye concentrations using spectroscopic absorbance data in the visible region. The samples were two-component red/yellow dye solutions with a concentration range of 0-900 mg/1 for the one component (red) while the concentration of the other component (yel..

High performance thin layer chromatography

The use of high-performance thin-layer chromatography in the analysis of dyestuffs to detect the presence of banned substances such as azo dyes and other carcinogenic substances is described. Future imports to Germany from Asian countries may require the certification of leather, textiles and other household commodities as free from speci..