|The Physical Object|
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Some batch dyeing machines only operate at temperatures up to ºC. However, the system can be pressurized, allowing for the use of temperatures above ºC. Cotton, rayon, nylon, wool and some other fibers dye well at temperatures of ºC or below. Polyester and some other synthetic fibers dye more easily at temperatures above by: Ring activators are groups that increase the electron density on the benzene ring and thereby make the ring more susceptible to electrophilic aromatic substitution deactivators decrease the electron density on the benzene ring, thus making the ring less reactive toward electrophilic aromatic substitution reactions. Resonance theory can be used to illustrate these processes. Dyes and Pigments 10 () Dyeing of Nylon 66 with Disperse Dyes. An Optimization Study Rosarina Carpignano, Piero Savarino, Ermanno Bami, Guido Viscardi, Adriano Baracco Istituto di Chimica Organica Industriale, Universita di Torino, C. so M. d'Azeg Torino, Italy & Sergio Clementi Dipartimento di Chimica, Universita di Perugia, Via Elee di So Perugia, Italy Cited by: 5. The treated dyeing was then rinsed thoroughly with tap water and allowed to dry in air. Fastness determination. The wash fastness of the dyed and aftertreated samples was determined according to the ISO CO6/E1 for nylon 6 and ISO CO6/B1 for wool at two different washing temperatures (70 °C, 95 °C for nylon 6 and 50 °C, 70 °C for wool).Cited by:
the use of pyridone as an active methylene compounds for the production of methine dyes . In this paper some 3-(p-substituted phenylazo)pyridone dyes were pre- pared by coupling the diazonium salts of p-substituted phenylamines with a 1-substituted 2-hydroxymethyl- 5-cyanopyridone coupling components. The spectral. Azo dyes are organic compounds, which contain the colouring azo function (N=N-). The azo function is often bound to an aromatic ring, and the dye can then be broken down to an aromatic amine, arylamine. This can take place either chemically, through 'reductive cleavage', or through the body's own enzyme system. Some azo dyes can also be broken. The dyeing and color fastness properties of three reactive-disperse dyes containing a sulphatoethylsulphone group on Nylon, cotton and N/C mixture fabrics were examined. Reduction-clearing was more effective in removing the unfixed dyes than soaping since the reactive-disperse dye became hydrophobic during dyeing by: 5. Purchase Handbook of Textile and Industrial Dyeing - 1st Edition. Print Book & E-Book. ISBN ,
Application of vegetable dyes for dyeing different substrates such as cotton(11), wool(), silk(), nylon(17), and polyester(18) were investigated to optimize their dyeing conditions. The present study is a serious trial to optimize the dyeing of nylon 6 with some selected vegetable dyes . Synthesis Of Some Novel Azo Dyes And Their Dyeing, Redox And Antifungal Properties K.R. Raghavendra1*, leading to the formation of aromatic amines of which have known mutagenic and/or carcinogenic amino- and hydroxy groups are commonly used coupling components. Indian Journal of Fibre & Textile Research Vol. 34, December , pp. Review Article Application of natural dyes on textiles Ashis Kumar Samanta a & Priti Agarwal Institute of Jute Technology, 35 Ballygunge Circular Road, Kolkata , IndiaCited by: The Dyes are classified based on the fibers to which they can be applied and the chemical nature of each dye. Dyes are complex unsaturated aromatic compounds fulfilling characteristics like intense color, solubility, Substantiveness, and fastness. Dyes can be defined as the different type of coloring particles which differ in each type from the other in chemical composition and are used for Author: Textile School.