Dyeing method of cotton-nylon core-spun spandex cheese

Abstract

The invention discloses a dyeing method of cotton-nylon core-spun spandex cheese and relates to the technical field of cheese dyeing. The dyeing method comprises the following steps: firstly, spoolinga large-diameter slack shell and then carrying out extrusion displacement treatment on the large-diameter slack shell by using a mechanical extrusion device and a small-diameter slack shell to obtainslack cheese wound on the small-diameter slack shell, wherein the cheese dyeing comprises pretreatment, nylon dyeing and cotton dyeing in sequence; the pretreatment is a one-bath one-step method of combining a boiling-off procedure with a bleaching procedure; using reactive dye ERIOFAST as working fluid for dyeing nylon, and washing after liquid drainage; taking the reactive dye as the working fluid for dyeing and washing after liquid drainage. According to the dyeing method disclosed by the invention, by changing a slack winding mode of the cheese, the problems of dyeing defects of the cotton-nylon core-spun spandex cheese and inconsistent elasticity of inner and outer layers after dyeing are solved; in addition, by selecting the reactive dye ERIOFAST for the nylon, a chemical bonding force between the dye and the nylon fibers is improved and the problem of poor color fastness is solved.

Description

technical field [0001] The invention relates to the technical field of cheese dyeing. Background technique [0002] Cotton nylon core-spun spandex is a core-spun yarn with spandex as the core and cotton staple fiber and nylon staple fiber as the outer layer. This variety not only has the good water absorption of natural fiber cotton, but also has the wear resistance and stiffness of nylon, and also has the elasticity of spandex, and has the function of gathering multiple fibers to meet people's needs. [0003] However, cotton-nylon core-spun spandex is rarely used in yarn-dyed fabrics at present, because there are three different fibers that cause great obstacles to package yarn dyeing: [0004] 1. Nylon dyed with acid dyes will stain cotton fibers, resulting in poor color fastness; [0005] 2. Acid dyes will slightly stain spandex, resulting in poor color fastness; [0006] 3. Acid dyeing generally needs to be dyed between 100°C and 110°C, while spandex will shrink viole...

AI Technical Summary

Problems solved by technology

[0003] However, cotton-nylon core-spun spandex is rarely used in yarn-dyed fabrics at present, because there are three different fibers that cause great obstacles to package yarn dyeing:

[0004] 1. Nylon dyed with acid dyes will stain cotton fibers, resulting in poor color fastness;

[0005] 2. Acid dyes will slightly stain spandex, resulting in poor color fastness;

[0006] 3. Acid dyeing generally needs to be dyed between 100°C and 110°C, while spandex will shrink violently under this high temperature condition, there is no extra shrinkage space for cheese, the stress will not be fully released, and the density will increase

[0007] Therefore, in the process of dyeing cotton-nylon core-spun spandex yarn, it is easy to have the problems of impermeable dyeing, colored flowers and different elasticities of the inner and outer layers of the package yarn.