NOPR Collection:

Relationship between Light Fastness and Electronic Spectra of Some New Azo Dyes Containing the Quinoline Nucleus

2016-07-20T06:40:11Z

Title: Relationship between Light Fastness and Electronic Spectra of Some New Azo Dyes Containing the Quinoline Nucleus Authors: Abdel-Hay, F. I.; Etaiw, S. H.; Anwar, M.; El-Morsi, M. Abstract: A number of azo dyes derived from 5-aminoquinoline have been prepared and tried as disperse dyes for nylon. Their dyeing properties have been compared with those of their analogues derived from 6-aminoquinoline. The UV, visible and IR spectral data for the various compounds are given. A correlation between light fastness and absorption spectra is attempted, and it is shown that the π - π* electronic energy is an important parameter determining the stability of the systems investigated. Page(s): 92-94

Thermal Insulation Values of Jute Fabrics and of Its Blends with Other Fibres

2016-07-20T06:40:03Z

Title: Thermal Insulation Values of Jute Fabrics and of Its Blends with Other Fibres Authors: Paul, N. Geo; Mukhopadhyay, Mukul Abstract: A simple method for the determination of thermal insulation values (TIV) of fabrics made of jute and its blends with other fibres is described. TIV has been found to be related to the thickness of the fabric, the basis weight and the number of layers of the fabric. The air spaces within the fabric and between the body and the fabric are also important. Increase in any of these factors increases TIV. The nature of the fibre has a marginal effect on TIV. Page(s): 88-91

Blending Characteristics of Acrylamide Grafted Nylon 6 Staple Fibres

2016-07-20T06:39:57Z

Title: Blending Characteristics of Acrylamide Grafted Nylon 6 Staple Fibres Authors: Ravishankar, S.; Kumar, Ramesh; Nigam, J. K. Abstract: The grafting of acrylamide onto nylon 6 staple fibres has been attempted with the objective of improving the moisture regain and blending characteristics of this nylon when blended with cotton. The method of grafting, characteristics of the grafted fibre and the blending behaviour of the fibres are described. The moisture regain of nylon has been observed to increase in direct proportion to the percentage graft-on. This facilitates processing of the nylon fibre when blended with cotton. Page(s): 85-87

Studies in Dyeing of Polyamides : Part I-Localized Chemical Modification of Polyamide Fabrics

2016-07-20T06:39:05Z

Title: Studies in Dyeing of Polyamides : Part I-Localized Chemical Modification of Polyamide Fabrics Authors: Achwal, W. B.; Nagar, M. R. Abstract: The possibility of modifying locally the dyeing properties of polyamide fabrics by a print-fix process has been investigated. The conditions of preparation and the use of suitable buffers for effecting storage stability of a reactive compound CS have been standardized. After printing and fixation under different conditions the printed portions were analyzed for effective reductions in end amino groups. Steam fixation was found to give the desired extent of blocking (50-60 %) in a short time without affecting the feel of the fabric. The printed portions exhibit a higher dye uptake for cationic dyes than the unprinted ground and reduced uptake for acid dyes, metal-complex dyes as well as reactive. The printing, however, causes no change in the uptake of dispersed yes. By a suitable combination of dyes dyeing conditions and auxiliary addition, interesting reserve tone in tone, two colour as well as three colour effects can be obtained. Page(s): 82-84