阅读说明：本技术 一种高耐水洗牢度吸水速干尼龙-棉交织针织物的染色工艺 (Dyeing process of water-absorbing quick-drying nylon-cotton interwoven knitted fabric with high washing fastness ) 是由 袁昂 张继磊 徐蓓蓓 程凯朋 胡永海 于 2020-05-07 设计创作，主要内容包括：本发明公开了一种高耐水洗牢度吸水速干尼龙-棉交织针织物的染色工艺,包括以下步骤：前处理、染棉、水洗、染尼龙、固色、皂洗。本发明的染色工艺可以使深色尼龙-棉交织面料的水洗牢度达到4-5以上,具有良好的吸水速干功能,而且染色重现性好,适合大生产应用。(The invention discloses a dyeing process of a water-absorbing quick-drying nylon-cotton interwoven knitted fabric with high washing fastness, which comprises the following steps: pretreatment, cotton dyeing, washing, nylon dyeing, color fixation and soaping. The dyeing process can ensure that the washing fastness of the dark nylon-cotton interwoven fabric reaches more than 4-5, has good water absorption and quick drying functions, has good dyeing reproducibility, and is suitable for large-scale production and application.)

1. A dyeing process of a water-absorbing quick-drying nylon-cotton interwoven knitted fabric with high washing fastness is characterized by comprising the following steps:

s1, pretreatment: pretreating the dyed fabric according to a conventional process;

s2, dyeing cotton: dyeing the cotton component of the pretreated fabric by using reactive dye according to a conventional process;

s3, washing: washing the dyed fabric with water, and adjusting the pH value to be neutral;

s4, dyeing nylon: adjusting pH to 3.5-4.5, adding adjuvant, dye, and moisture-absorbing and sweat-releasing agent, heating to 90-110 deg.C at a rate of 2.0 deg.C/min, maintaining the temperature for 30-60min, cooling to below 60 deg.C at a rate of 2.0 deg.C/min, and discharging liquid;

s5, color fixing: adding caustic soda and special color fixing agent, rapidly heating to 60-90 deg.C, maintaining the temperature for 10-20min, and discharging liquid;

s6, soaping: adding a certain amount of soaping agent, heating to 80-100 deg.C for soaping, cooling to below 60 deg.C, and discharging liquid.

2. The dyeing process according to claim 1, wherein the washing temperature in step S3 is 80-100 ℃ and the time is 10-20 min.

3. The dyeing process according to claim 1, wherein the pH value is adjusted in step S4 by using acetic acid/sodium acetate buffer solution.

4. The dyeing process according to claim 1, wherein the auxiliary agents added in step S4 are SET, UPS, CaCl₂One or more of them.

5. The dyeing process according to claim 1, wherein the dye added in step S4 is a reactive dye with gorgeous fastness.

6. The dyeing process according to claim 1, characterized in that the moisture absorbing and sweat releasing agent added in step S4 is a moisture absorbing and sweat releasing finishing agent PR18 in an amount of 2% -5% o.w.f.

7. The dyeing process according to claim 1, wherein the fixing agent added in step S5 is gorgeous FIX in an amount of 1-3 g/L.

8. The dyeing process according to claim 1, wherein step S6 is performed by adding a soaping agent SNS in an amount of 1 to 3 g/L.

Technical Field

The invention relates to the technical field of spinning, in particular to a dyeing process of a water-absorbing quick-drying nylon-cotton interwoven knitted fabric with high washing fastness.

Background

The nylon-cotton interwoven fabric can well organically combine the moisture absorption and air permeability of the cotton fibers with the wear resistance and high elasticity of the nylon fibers, has good hand feeling and wearing comfort, is popular with consumers and is popular in the garment fabric market. The common dyeing process of the fabric in the dyeing processing is reactive/acid dye two-bath two-step dyeing, namely dyeing the cotton component by using the reactive dye, and then dyeing the nylon component by using the acid or neutral dye. However, the problem of poor fastness to washing exists in the actual production process, and the main reason is that the glass transition temperature Tg of the nylon fiber is low, and when the fastness to washing is tested at the temperature of more than 50 ℃, part of dye molecules are easy to migrate from the interior of the fiber to the surface of the fiber, so that the problems of fading and staining are caused. In addition, the color light is unstable, and the batch difference of the fabrics dyed by the same formula is serious, which is mainly caused by the cross staining phenomenon of the two components in the dyeing process.

Disclosure of Invention

The invention aims to provide a dyeing process of a water-absorbing quick-drying nylon-cotton interwoven knitted fabric with high washing fastness aiming at the defects in the prior art. The invention adopts gorgeous and firm series reactive dyes developed by Henschel company to dye nylon components, so that the nylon components can obtain extremely high dyeing depth and washing fastness; by adopting a special post-treatment process, the floating color can be washed away, the cross contamination of the nylon component and the cotton component by the dye is reduced, and the color stability is greatly improved; meanwhile, a water-absorbing quick-drying finishing agent is added in the dyeing step, so that the fabric is endowed with a good water-absorbing quick-drying function, and the additional value of the fabric is increased.

In order to achieve the purpose, the invention adopts the technical scheme that:

the dyeing process of the water-absorbing quick-drying nylon-cotton interwoven knitted fabric with high washing fastness comprises the following steps:

s1, pretreatment: pretreating the dyed fabric according to a conventional process;

s2, dyeing cotton: dyeing the cotton component of the pretreated fabric by using reactive dye according to a conventional process;

s3, washing: washing the dyed fabric with water, and adjusting the pH value to be neutral;

s4, dyeing nylon: adjusting pH to 3.5-4.5, adding adjuvant, dye, and moisture-absorbing and sweat-releasing agent, heating to 90-110 deg.C at a rate of 2.0 deg.C/min, maintaining the temperature for 30-60min, cooling to below 60 deg.C at a rate of 2.0 deg.C/min, and discharging liquid;

s5, color fixing: adding caustic soda and special color fixing agent, rapidly heating to 60-90 deg.C, maintaining the temperature for 10-20min, and discharging liquid;

s6, soaping: adding a certain amount of soaping agent, heating to 80-100 deg.C for soaping, cooling to below 60 deg.C, and discharging liquid.

Preferably, the washing temperature in the step S3 is 80-100 ℃, and the time is 10-20 min.

Preferably, the pH adjustment in step S4 is performed using an acetic acid/sodium acetate buffer solution.

Preferably, the auxiliary agents added in the step S4 are SET, UPS, CaCl₂One or more of them.

Preferably, the dye added in step S4 is a reactive dye with bright fastness.

Preferably, the moisture absorbing and sweat releasing agent added in the step S4 is a moisture absorbing and sweat releasing finishing agent PR18, and the dosage of the moisture absorbing and sweat releasing agent is 2% -5% o.w.f.

Preferably, the fixing agent added in the step S5 is gorgeous FIX, and the dosage of the fixing agent is 1-3 g/L.

Preferably, the soaping agent added in the step S6 is SNS, and the dosage of the SNS is 1-3 g/L.

By adopting the technical scheme, compared with the prior art, the invention has the following technical effects:

the dyeing process can ensure that the washing fastness of the dark nylon-cotton interwoven fabric reaches more than 4-5, has good water absorption and quick drying functions, has good dyeing reproducibility, and is suitable for large-scale production and application.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

The present invention is further illustrated by the following examples, which are not to be construed as limiting the invention.