'Standardization of Recipe for Dyeing Staining Free Polyester/Cotton Blended Yarns'
Disperse dyes give excellent overall fastness properties with polyester where it gives very poor fastness properties with cellulose. The reason behind this is disperse dyes does not have any substantivity & affinity towards cotton & cotton cannot be dyed at very high temperature as like Polyester. Hence P/C blend dyeing will not give sufficient fastness properties compared to 100% Polyester. Normally in industries a recipe used for dyeing 100% Polyester is also applied for different proportions of P/C blends and then it is topped up with reactive dyes to match the shade. But it will not give sufficient fastness properties.
The object of the work is to standardize (P/C blend worked out with three different proportions) and to formalize the individual recipe for each proportions to improve the fastness properties of blended fabrics.
100% PET means for strength, crease resistance but it cannot be wearable because of low moisture content, static generation and accumulation, so P/C blend enters in market because it has a advantages of both PET and cellulose and can be wearable.
PET cotton blend has got lot of advantages from user point of view but from dyers point of view it was difficult to dye the blends. P/C blends does not give sufficient fastness properties as like 100% PET with disperse dyes. In industries, single recipe used for 100% PET is also applied for different proportions of P/C blends & then it was topped up with reactive dyes to match the standard shade. But the fastness properties of these blend is a big question mark. While using disperse dyes for dyeing P/C blends, it is noticed that the PET portion is not only dyed but not the cellulosic portion. It only stains the cellulosic portion. So the overall fastness properties of P/C blend fabrics is going to be less and also the staining of disperse dyes on cotton is more.
In our work, we are going to dye three different proportions of P/C blends with disperse dyes and reactive dyes. Here, we change the procedure of dyeing P/C blend which are in practice in order to standardize the individual
recipe for each proportion by using disperse dyes and reactive dyes.
3) Materials & Methods:
In our work, we have taken p/c blends yarns since p/c blended fabrics are mostly used for wearable purpose
1. 100% polyester yarn
Type : spun yarn
Count : 20s