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Darji A.,Grasim Industries Ltd.
International Dyer | Year: 2012

As viscose has better whiteness, lustre, softness and smoothness, its incorporation with cotton (ie. blending) gives more subjective values (ie. more dye pick-up, bright shades, good colour yield and also aesthetic values in terms of lustre, softness, etc), compared to 100% cotton, with the less usage of dyestuffs, chemicals and auxiliaries. 100% cotton reactive prints are generally dull and fuzzy. The sharpness of the print for 100% cotton fabric is also not so good. A cotton/viscose blend is unique and yet very conventional and even easy to handle from the wet processing point of view. This blended fabric also reduces production cost by around 15-20% compared to 100% cotton woven fabric, giving sharp and clear print. In this study, an objective as well as subjective comparison of fabric properties was carried out for 100% cotton vs. cotton/viscose 65/35 printed, finished fabric. Source


Darji A.,Grasim Industries Ltd.
Colourage | Year: 2011

Viscose treatment needs high care and know how because viscose fabrics are more susceptible to the chemical processes. In this study, caustisizing which is generally found to be dangerous in the pretreatment of the viscose fabrics was applied to the viscose fabrics. It was found that the usage of caustic soda in the pretreatment of viscose fabrics ensured considerable advantages in terms of pilling degree and colour efficiency in textile dyeing. After causticization, the surface of the fabrics became smoother and fuzzy of the fabrics decreased. In addition, performing a caustic treatment before dyeing with reactive dyestuff caused an increase in the colour efficiency. Source


Darji A.,Grasim Industries Ltd.
Textile Trends | Year: 2012

Weight Reduction (WR) process is generally carries out to reduce the rigidity of polyester as well as to increase the bounce/suppleness of the polyester fabric. Viscose treatment needs high care and know how, because viscose fabrics are more susceptible to the strong alkaline. WR process is carried out in strong alkaline conditions with the use of Caustic soda flakes at higher temperature In this study, WR process which is generally found to be dangerous for the viscose was applied to the Polyester/viscose 65/35 fabric. It was found that the usage of caustic soda i.e. WR process of PV fabric ensured considerable advantages in terms of colour efficiency, better fabric handle i.e. softness and bounce and good lustur. After WR process, the surface of the fabric became smoother and fuzzy of the fabrics decreased. In addition, performing a WR before dyeing with disperse and reactive dyestuff caused an increased in the colour efficiency. Source


Patent
GRASIM INDUSTRIES Ltd | Date: 2012-04-05

A process for manufacturing low-fibrillating cellulosic fibers by a dry-jet-wet spinning process is provided. The cellulose is treated with a specific ionic liquid based solvent to produce the said fibers with fibrillating index less than or equal to (3).


Patent
GRASIM INDUSTRIES Ltd | Date: 2012-04-05

The present invention provides a process for producing low fibrillating cellulose fibers by a dry-jet-wet spinning process wherein cellulose is treated with a solvent containing imidazolium ionic salt in a spinneret maintained at a temperature of 100-120 C. and the spun fibers drawn to the coagulation bath containing ionic salt with the draw ratio less than 5, to produce fibers with fibrillating index less than or equal to 3.

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