Effect of Different Pretreatment on Various Properties of Undyed and Dyed Jute Fabrics

Zakaria Ahmed

Abstract


The jute fabrics were desized, scoured, caustic soda mercerized at room temperature (25-30oC) and ammonia mercerized at -33oC and bleached. Then the above fabrics were dyed with Procion orange MX-2R (Reactive dyes) dye applying by standard procedure to investigate the change in different properties like moisture regain, abrasion resistance and flexural rigidity etc. of dyed jute products. The x-ray analysis also have done of those undyed, differently treated-dyed jute fabrics. It is found that the moisture regain percentage of the jute fabrics increased after different treatments and the moisture regain percentage of dyed fabrics decreased in all the case. The number of abrasion rotations decreased on the treatment of the fabrics but ammonia treated samples gave better abrasion resistance than other samples. The differently treated dyed jute fabrics appear to decrease flexural rigidity or stiffness. It was also found that the brag space values (d) were 4.83 Å, 5.02 Å and 4.00 Å for normal bleached, ammonia mercerized- bleached and caustic soda mercerized-bleached fabrics respectively. The value of brag space (d) of those dyed fabrics of normal bleached, ammonia mercerized-bleached and caustic soda mercerized-bleached fabrics were found to be 4.96 Å, 5.40 Å and 4.49 Å respectively. The brag space (d) values of the dyed fabrics are higher than undyed fabrics. The liquid ammonia (-33oC) treated jute fabrics shows better properties than other treated fabrics. So, it can be concluded that anhydrous liquid ammonia (-33oC) treatment and bleaching process before dyeing/printing is suitable for the diversification of jute for value addition.

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