NOPR Collection:

Effect of Oil Content on Hairiness of Jute Yarn

1986-09-01T00:00:00Z

Title: Effect of Oil Content on Hairiness of Jute Yarn Authors: Ghosh, S N; Bhattacharyay, G K; Sil, N K; Mukhopadhyay, B N Abstract: At 4% oil content the yarn produced a minimum number of hairs per unit length and below and above this oil content the hairiness increased greatly. With total omission of oil in the yarn, the hairiness was maximum. Page(s): 168-169

Azodisperse Dyes with 4-Quinazolinone Ring for Dyeing Polyester and Nylon Fibres

1986-09-01T00:00:00Z

Title: Azodisperse Dyes with 4-Quinazolinone Ring for Dyeing Polyester and Nylon Fibres Authors: Patel, M H; Patel, (Miss) R G; Patel, V S Abstract: Thirty-two 6-nitro-3-(p- and m-arylazophenyl)-2-methyl-4-quinazolinone dyes were prepared and their dyeing performance on polyester and nylon fibres was assessed. All the dyes showed fair to very good light fastness and very good to excellent fastness to washing, rubbing, perspiration and sublimation. Page(s): 164-167

Azodisperse Dyes with Photochromic Mercury(II)-Dithizonate Moiety for Dyeing Polyester, Nylon and Cellulose Triacetate Fibres: Dyes Based on N-Substituted Aromatic Amines as Coupling Components

1986-09-01T00:00:00Z

Title: Azodisperse Dyes with Photochromic Mercury(II)-Dithizonate Moiety for Dyeing Polyester, Nylon and Cellulose Triacetate Fibres: Dyes Based on N-Substituted Aromatic Amines as Coupling Components Authors: Shan, P H; Patel, (Miss) R G; Patel, V S Abstract: Twelve photochromic azodisperse dyes based on N-substituted and N,N-disubstituted derivatives of anilines and m-substituted anilines were synthesized and their dyeing performance on polyester, nylon and cellulose triacetate fibres was assessed. All the dyes showed moderate to good fastness to light and very good to excellent fastness to washing, rubbing, perspiration and sublimation. The dyed fibres on exposure to bright sunlight or a light of suitable wavelength showed a very good photochromic effect giving various shades. When the fibres were removed from the sunlight the colour returned to the original shade. The time required for this return depended on the intensity of incident light, ambient temperature and the moisture content of fabric. Polyester fibres required a longer duration for attaining the original shade but rapid change was observed by ironing the, cloth. The duration the fibre required to attain the original shade could be reduced to 3 min for nylon and cellulose triacetate and to 2-3 min for polyester fibres by keeping them in an oven at 80°C and 100°C respectively. Page(s): 160-163

Absorption Spectra of Selected Vat Dye Mixtures on Cellophane

1986-09-01T00:00:00Z

Title: Absorption Spectra of Selected Vat Dye Mixtures on Cellophane Authors: Mehta, D S; Mehta, H U; Mehta, P C Abstract: The sorption behaviour of five leuco vat dyes singly and of their four binary mixtures on cellophane has been compared from the observed arid theoretical spectra. Out of four mixtures, three showed interacting behaviour, as their spectra were non-additive in nature. The same was confirmed by job's method of continuous variation. Page(s): 156-159