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Gupta V.K.,Mlv Textile And Engineering College
International Dyer | Year: 2013

Generally sodium hydrosulphite (Na2S2O4) (ie. sodium dithionite) Is a preferred reducing agent In dyeing of cellulosic fibre with vat dyes. The high cost and excess requirement of sodium hydrosulphite increases the cost of dyeing. In this experiment, the use of a combined mixture of sodium hydrosulphite, sodium bisulphite and sodium sulphite in appropriate proportions gave good results in terms of colour value. The cost of dyeing was also reduced significantly due to partial replacement of hydrosulphite. Source


Tyagi G.K.,The Technological Institute of Textile and science | Tyagi G.K.,Mlv Textile And Engineering College | Goyal A.,The Technological Institute of Textile and science | Chattopadhyay R.,Indian Institute of Technology Delhi
Indian Journal of Fibre and Textile Research | Year: 2013

The physical characteristics of tencel-polyester and tencel-cotton yarns spun on ring, rotor and air-jet spinning machines in relation to blend ratio and twist factor have been studied. It is observed that amongst ring, rotor and MJS yarns, the ring yarns are stronger, less rigid and possess higher work of rupture, whereas rotor yarns are more even, have fewer imperfections and less hairy regardless of fibre-mix. Also, rotor- spun yarns have higher extensibility than ring and MJS yarns for tencel-cotton mix. Further, tencel-polyester yarns yield more satisfactory results than the tencel-cotton yarns in terms of strength, breaking extension, evenness, imperfections and work of rupture. Increasing tencel content both in tencel-polyester and tencel-cotton fibre mix makes the yarn rigid and more hairy. Source


Tyagi G.K.,The Technological Institute of Textile and science | Tyagi G.K.,Mlv Textile And Engineering College | Goyal A.,The Technological Institute of Textile and science | Chattopadhyay R.,Indian Institute of Technology Delhi
Indian Journal of Fibre and Textile Research | Year: 2013

The properties of tencel-polyester and tencel-cotton blended ring-spun yarns produced with five different blend ratios and six twist factors have been studied. It is observed that tencel-polyester yarns are stronger, more extensible, more even, rigid, less hairy and have fewer imperfections than their tencel-cotton counterparts. A higher level of twist produces a yarn with higher extension, unevenness, imperfection and flexural rigidity, and lower hairiness. The yarn strength, on the other hand, increases initially but decreases thereafter as the yarn twist is further increased beyond that level. An increase in proportion of tencel fibre in the mix enhances the tensile and regularity characteristics of tencel-cotton yarns. However, for tencel-polyester yarns, both these characteristics deteriorate with increase in tencel content in the mix. Source


Tyagi G.K.,Mlv Textile And Engineering College | Goyal A.,Technological Institute of Textile and science | Murmu G.G.,Technological Institute of Textile and science
Textile Asia | Year: 2011

This study examines the structure and physical characteristics of bamboo-cotton yarn spun on OE rotor and air-jet machines in relation to blend ratio, linear density and production speed. Source


Gupta V.K.,Mlv Textile And Engineering College
International Dyer | Year: 2015

The conventional method to impart dimensional stability in cotton fabric is by treating cotton fabric with anti-creasing chemical (resin) at very high concentration, which has the potential problem of formaldehyde release. In this experiment there was an effort to treat cotton fabric with silicone softener, which makes the fabric hydrophobic by reacting with cellulosic-OH groups and produces dimensional stability by reducing the swelling power of the fibre. The silicone effect is very similar to the resin effect with minimum environmental threat. Source

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