NOPR Collection:

Contribution of fibre profile and twist factor to flexural rigidity and elastic recovery of polyester fibre yarns

1990-12-01T00:00:00Z

Title: Contribution of fibre profile and twist factor to flexural rigidity and elastic recovery of polyester fibre yarns Authors: Kaushik, R C D; Tyagi, G K; Chatterjee, K N Abstract: The flexural rigidity is highest for 2.5 denier trilobal fibres followed by 3 denier trilobal fibres and 3 denier circular fibres. An increase in twist factor results in a significant increase in yarn flexural rigidity. The yarns spun from fine denier fibres show higher elastic recovery. However, for both trilobal and circular fibres, twist factor has no effect on yam elastic recovery. Page(s): 200-201

Contribution of ringframe drafting condition to yarn count variability in fine counts

1990-12-01T00:00:00Z

Title: Contribution of ringframe drafting condition to yarn count variability in fine counts Authors: Balasubramanian, N; Janakiraman, C Abstract: The results presented show that the old drafting systems at ringframe can be a source of yarn count variability in fine counts. Slippage of strand takes place under the drafting rollers under such conditions, leading to count variation. Frame-to-frame variation in count is encountered and individual frame-wise control in place of traditional group control is advantageous in keeping down the count variability between frames. C and D types of classimat faults and winding breaks also increase. Use of bigger diameter cots, incorporation of washer under the spring and renovation of top arm are shown as some interim measures helpful to bring down the count variability. The replacement of the old top arm by the second generation top arm helps ultimately in bringing the count variability well under control. Page(s): 198-199

Synthesis of azodisperse dyes containing triazole ring for dyeing acetate and/or other fibres: Part I

1990-12-01T00:00:00Z

Title: Synthesis of azodisperse dyes containing triazole ring for dyeing acetate and/or other fibres: Part I Authors: Fadda, A A; Elmorsy, S S; El-Said, A M; Khalil, A M; Elagizy, S A Abstract: Sixteen arylazo derivatives of 3-(2-hydroxyphenyl)-5-mercapto-4H-1,2,4-triazole and its 4-ethyl derivative have been prepared for use as dyestuffs. The effect of the nature and orientation of substituents in the diazonium component on the colour of azo dyes is discussed. The dyeing performance of the dyes on different fibres has also been assessed. Page(s): 190-197

Studies on combined dyeing and resin finishing of jute fabrics using direct dye and DMDHEU

1990-12-01T00:00:00Z

Title: Studies on combined dyeing and resin finishing of jute fabrics using direct dye and DMDHEU Authors: Bagchi, A; Saha, S G; Dasgupta, B; Saha, A; Mukherjee, A K Abstract: Direct dyeing and anticrease finishing of jute fabrics were carried out in a single-step process under acidic conditions with a view to economized dyeing and finishing. The properties of the finished fabric, viz. colour strength, crease recovery and wash fastness were comparable to those of the fabrics dyed and finished by the conventional double-step process. Work on optimizing the process parameters viz. catalyst concentration and curing temperature, was also carried out. The duration of curing was kept constant in all the experiments. Incorporation of acrylamide in the padding bath of single-step process improved the colour yield. Page(s): 185-189