Dyeing and finishing process for improving color fastness to light of light-colored fabric of FDY (Fully Drawn Yarn) polyester filament yarn warp and weft four-way elastic textile

Abstract

The invention discloses a dyeing and finishing process for improving the color fastness to light of a light-colored fabric of an FDY (Fully Drawn Yarn) polyester filament yarn warp and weft four-way elastic textile. The dyeing and finishing process comprises a dyeing process; a formula of a dyeing auxiliary adopted in the dyeing process comprises the following components: 0.5g / L to 1g / L of high-efficiency dispersant, 2g / L to 3g / L of chelating dispersant, 0.3g / L to 0.5g / L of 99 percent glacial acetic acid, X percent (o.w.f.) (on Weight the Fabric) of disperse yellow AM-2R, Y percent (o.w.f.) of disperse red AM-SLR and Z percent (o.w.f.) of disperse blue AM-SLR, wherein the sum of X, Y and Z is not more than 0.5, and a bath ratio is 1: (3 to 4). According to the dyeing and finishing process, the light-colored fabric of the FDY polyester filament yarn warp and weft four-way elastic textile which does not contain a fluorescent whitening agent and is obtained by being dyed by a disperse dye with color fastness to high sunlight is used as greige cloth; the color fastness to light which is up to a rating of 5 to 6 is realized through the specific dyeing and finishing process.

Description

technical field [0001] The invention belongs to the field of fabric dyeing and finishing, and in particular relates to a dyeing and finishing process for light color fastness of FDY polyester filament four-way elastic light-colored fabrics. Background technique [0002] FDY: FULLYDRAWNYARN, fully drawn yarn (Taiwan is called fully drawn yarn), the drawing effect is introduced in the spinning process, and winding yarn with high degree of orientation and medium crystallinity can be obtained, which is fully drawn yarn. The conventional fully drawn yarns of polyester and nylon belong to chemical fiber filaments. FDY polyester filament four-way stretch feels smooth and soft, and is widely used in clothing and home textiles. With the evolution of market demand, people's requirements for this fabric have also increased. A light-colored fabric with FDY polyester filament four-way stretch that is resistant to high sunlight is more popular among people. [0003] However, the color f...

AI Technical Summary

Problems solved by technology

[0003] However, the color fastness to light of the FDY polyester filament four-way stretch light-colored fabric obtained by the conventional process cannot meet the market demand. The main reasons are as follows:

[0004] First, during pre-shrinking and pre-treatment, the equipment used is a high-temperature and high-pressure overflow dyeing machine, and the temperature is also high (100°C), which may easily cause the shrinkage of the FDY polyester filament four-way stretch fabric to be uneven, and the cloth surface is easy to shrink. Wrinkles, scratches and aurora prints are serious

[0005] Second, when dyeing, it is necessary to sew the two selvedges against each other along the warp direction of the cloth to prevent more serious scratches, wrinkles and aurora marks on the front of the fabric under high temperature and high pressure conditions, which is time-consuming and labor-intensive. low

[0006] Third: The color fastness to light of light-colored FDY polyester filament four-way stretch fabric is difficult to reach (5-6) level (color fastness to artificial light: xenon arc GB / T8427: 2008), when weaving, the used FDY polyester filament yarn does not consider whether it contains fluorescent whitening agent. The color fastness to light of the fluorescent whitening agent added during spinning is generally poor. Dyes, because of the poor color fastness to light of fluorescent whitening agents, there may still be no way to meet the customer's requirements for color fastness to light of the fabric; at the same time, because these fluorescent dyes occupy part of the amorphous region of the fiber space, which produces certain resistance to the dyeing of fibers with disperse dyes, increases the probability of dyeing on the surface of fibers, and is also not conducive to fabrics meeting the requirements for color fastness to light.

During the whole dyeing and finishing process, although the non-ionic surfactant is partially washed off due to the washing effect, some parts remain on the cloth surface, which will make the dyed disperse dyes produce better after dyeing and setting. The thermal migration of the dyestuffs in the fiber from the inside to the outside, eventually resulting in the color fastness to light of the dyed finished fabric not meeting the customer's requirements

[0008] Fifth, the silicone softener added to the setting after dyeing may contain emulsifiers. Most of these emulsifiers are non-ionic surfactants. During the setting process after dyeing, the dyed disperse dyes will be better Thermal migration causes the dye to migrate from the inside to the outside of the fiber, eventually resulting in the color fastness to light of the dyed finished fabric failing to meet the customer's requirements

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