What are the characteristics of polyester cotton blend materials and their dyeing process

- Mar 01, 2019 -

Polyester-cotton blended material, which is a blend of polyester and cotton. Specifically, it is made of 65%-67% polyester and 33%-35% cotton blended yarn to make it into textiles. “It’s good,” and it’s a common and common material for making clothing.

 

1. Some notes on polyester-cotton blended materials

Polyester cotton in polyester-cotton blends, which is a mixture of polyester and cotton, and polyester is a high-yield variety of synthetic fibers. Its chemical name is polyethylene terephthalate, usually chemical polymerization. Therefore, polyester is also called polyester, and its structural form is determined by the orifice. Moreover, the conventional polyester cross section is circular and has no intermediate cavity, so that changing the cross-sectional shape of the fiber can produce a shaped fiber.

 

The characteristics of polyester/cotton are not only the advantages of polyester style but also cotton fabric. The elasticity and wear resistance are better in dry and wet conditions, and the dimensional stability and shrinkage rate are small, it is not easy to wrinkle and easy to wash and dry. Other advantages, but not high temperature ironing and boiling water soaking.

In addition, we also need to know that polyester fiber in polyester cotton is a hydrophobic fiber, which has a strong affinity for oil stains, so it is easy to absorb oil stains. Clothes made of this material will generate static electricity during the wearing process. Dust, which increases the difficulty of washing, so you need to be careful at this point. In addition, polyester cotton is a synthetic fiber that cannot be degraded.

 

2. Dyeing process of polyester-cotton blended materials

(1) two-bath staining

First, the polyester is dyed in a disperse dye acid bath, and then the cotton is dyed in a reactive dye alkaline bath. With this dyeing process, the dyes have little influence on each other and are relatively easy to control, and a high dyeing can be obtained. Rate and better dyeing effect, but the energy consumption is relatively large.

(2) reducing soap washing machine

Polyester and cotton are dyed in the same bath under neutral conditions. Cotton is a reactive dye with a pH close to neutral dyeing. Polyester is selected as a disperse dye and dyed under neutral conditions, and an appropriate amount of pH adjuster is added. To keep the dye bath neutral. This dyeing process has the advantages of simple operation, good reproducibility and energy saving.

 

In addition, in the dyeing process, since high-temperature treatment is required for finishing, the high-temperature disperse dye with better sublimation fastness should be selected as the hot-dissolution dyeing of the disperse dye, so as to ensure the color fastness of the product. For some bright colors, if low-temperature disperse dyes must be used, the finishing temperature should be lowered and the baking time should be extended to compensate for the finishing.

 

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