Abstract
Pre-treatment of cotton fabric prior to dyeing mainly involves a combined process consisting of scouring and peroxide bleaching. In this study main focus on to find out the major problem facing during dyeing of cotton fabrics. Pretreatment process has a greater impact on whiteness and dyeing properties of fabrics and also on environment. There are two process of pretreatment which is alkaline scouring and bleaching process and another is enzymatic scouring and bleaching process, between this two processes comparison and also observation its effects on whiteness of fabric, dyeing also impact on environment. It is also observe that the 3 gL-1 hydrogen peroxide and 2 gL-1 sodium hydroxide give the good result on fabric whiteness with low environmental impact. Different pre-treated sample of cotton fabric dyed with reactive dye. The result obtain from dyed samples the combine pre-treatment by enzymatic scouring and bleaching gives good alternative of alkaline scouring bleaching process. Since it produce low BOD, COD and TOC impact on ecological factor. Furthermore it is also added advantages that it produces same whiteness and lower hydrolysation of dyestuff and good exhaustion.
Highlights
Cotton is the oldest and the most important of the textile fibers
We are using more cotton fabrics for our daily life survives in the world
Pretreatment is a process for prior fabric dyeing which involves scouring and bleaching
Summary
Cotton is the oldest and the most important of the textile fibers It has been used in the East and Middle East for thousands of years and was found in use in America when the continent was discovered. The object of scouring and bleaching is to produce white fabrics by destroying the colorings matter with the help of bleaching agents with minimum degradation of the fiber [1,2]. Highly alkaline chemicals, such as sodium hydroxide, are usually used for scouring in textile finished fabric production. These chemicals remove the impurities, and attack the cellulose, leading to a reduction in strength, fabric weight loss [6,7]. A day’s textile producers have the possibility of applying a new, effective alternative to chemical scouring, with the enzyme and various other combined processes which are completely meet the requirements of scouring and bleaching [8,9]
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