阅读说明：本技术 一种醚化2d树脂改性的棉织物的分散染料染色方法 (Disperse dye dyeing method of etherified 2D resin modified cotton fabric ) 是由 徐卫林 杜立新 王运利 张凯 梁明钰 解倩倩 于 2019-12-18 设计创作，主要内容包括：本发明涉及纺织技术领域,公开了一种醚化2D树脂改性的棉织物的分散染料染色方法,该方法包括以下步骤：(1)免烫预处理：使用醚化2D树脂作为免烫整理剂对棉织物进行免烫整理；(2)分散染料染色：使用分散染料配制剂对经步骤(1)预处理后得到的棉织物进行分散染料染色。该方法能有效地使用分散染料对棉织物进行染色,工艺简单,生产过程污水治理成本低,对环境友好。(The invention relates to the technical field of textiles, and discloses a disperse dye dyeing method of etherified 2D resin modified cotton fabrics, which comprises the following steps: (1) non-ironing pretreatment: carrying out non-ironing finishing on the cotton fabric by using etherified 2D resin as a non-ironing finishing agent; (2) dyeing with a disperse dye: and (3) dyeing the cotton fabric pretreated in the step (1) by using a disperse dye preparation through a disperse dye. The method can effectively dye the cotton fabric by using the disperse dye, has simple process and low sewage treatment cost in the production process, and is environment-friendly.)

1. A disperse dye dyeing method of etherified 2D resin modified cotton fabric is characterized by comprising the following steps:

(1) non-ironing pretreatment: etherified 2D resin is used as a non-ironing finishing agent to carry out non-ironing finishing on cotton fabric, wherein the structural formula of the etherified 2D resin is shown as a formula (I),

wherein n is an integer of 3 to 5;

(2) dyeing with a disperse dye: and (3) dyeing the cotton fabric pretreated in the step (1) by using a disperse dye preparation through a disperse dye.

2. The method according to claim 1, wherein in step (1), the process of permanent press finishing comprises: soaking and rolling the cotton fabric into finishing liquid containing etherified 2D resin to ensure that the liquid carrying rate is 70-80 percent, drying the cotton fabric for 3-10 minutes at 75-85 ℃, baking the cotton fabric for 1.5-3 minutes at 150-170 ℃, and then taking out the treated cotton fabric to carry out water washing and drying at 75-85 ℃.

3. The method as claimed in claim 2, wherein the finishing liquid containing etherified 2D resin further contains a penetrant and magnesium chloride, wherein the concentration of the etherified 2D resin is 100-200g/L, the concentration of the penetrant is 0.1-2g/L, and the concentration of the magnesium chloride is 10-40 g/L.

4. The method as claimed in claim 3, wherein in the finishing liquid containing etherified 2D resin, the concentration of the etherified 2D resin is 120-160g/L, the concentration of the penetrating agent is 0.2-1g/L, and the concentration of magnesium chloride is 20-30 g/L.

5. The method according to claim 1, wherein in the step (2), the step of dyeing with the disperse dye comprises: adding a cotton fabric into a disperse dye preparation, wherein the bath ratio is 1:10-50 ℃, the initial dyeing temperature is 30-60 ℃, then the temperature is raised at the heating rate of 1-3 ℃/min, the temperature is kept for dyeing for 40-80min after reaching 70-100 ℃, then the temperature is lowered at the cooling rate of 1-3 ℃/min, the temperature is lowered to below 50 ℃, then the cloth is taken out, and reduction cleaning is carried out.

6. The method as claimed in claim 5, wherein the disperse dye formulation is a disperse suspension of disperse dye in water, and the amount of the disperse dye is 0.5-5% of the mass of the cotton fabric.

7. The method of claim 6, wherein the disperse dye is at least one of disperse blue, disperse black, disperse gray, disperse red, disperse violet, disperse yellow, and disperse orange.

8. The method of claim 6, wherein the disperse dye formulation further comprises a leveling agent;

preferably, the leveling agent is used in an amount of 0.05% to 0.5% by mass of the disperse dye formulation.

9. The method according to claim 6, wherein the solution for reductive cleaning is a mixed aqueous solution of sodium hydrosulfite and caustic soda.

10. The method according to claim 9, wherein the concentration of sodium hydrosulfite in the solution for reductive cleaning is 0.5-4g/L, and the concentration of caustic soda is 0.5-4 g/L.

Technical Field

The invention relates to the technical field of textiles, in particular to a disperse dye dyeing method of etherified 2D resin modified cotton fabrics.

Background

The pure cotton fabric is produced by using cotton as a raw material through a textile process, and has the characteristics of moisture absorption, moisture retention, heat resistance, alkali resistance, sanitation and the like. The pure cotton fabric is comfortable to wear and good in skin friendliness, is widely favored by people, and is particularly considered as the safest fabric in infant clothes.

In the existing dyeing field, the cotton fabric is dyed by using reactive dyes most commonly, but in the reactive dye dyeing process, in order to enable the dyes to have enough affinity to cotton fibers, a large amount of electrolytes (salts) need to be added, and meanwhile, a large amount of alkali needs to be added to provide a needed alkaline environment for dyeing, so that the difficulty of treating the reactive dye dyeing wastewater is greatly increased, and the dyeing cost is also increased. Meanwhile, the active dye is limited by the color spectrum, and has fewer beautiful colors and fluorescent color systems, so that the increasingly growing aesthetic requirements of people cannot be met.

Another common dyeing method is disperse dye dyeing, which is commonly used for dyeing terylene because of its excellent properties of bright and rich color, fastness to washing, rubbing and sun, mildness to skin, and environmental friendliness, and its dyeing process usually requires higher temperature or pressure, for example, the dyeing condition is heating to 130 ℃ and pressurizing or hot melting to 180 ℃. However, since there are many hydrophilic hydroxyl groups on cotton fiber, and the disperse dye is a nonionic dye with low water solubility and strong hydrophobicity, and has no affinity to cotton fiber, it is difficult to dye the cotton fiber with the disperse dye.

Disclosure of Invention

The invention aims to overcome the problems existing in the process of dyeing cotton fabrics by using the reactive dye and provides a disperse dye dyeing method of etherified 2D resin modified cotton fabrics.

In order to achieve the above object, the present invention provides a disperse dye dyeing method of etherified 2D resin modified cotton fabric, comprising the steps of:

(1) non-ironing pretreatment: etherified 2D resin is used as a non-ironing finishing agent to carry out non-ironing finishing on cotton fabric, wherein the structural formula of the etherified 2D resin is shown as a formula (I),

wherein n is an integer of 3 to 5;

(2) dyeing with a disperse dye: and (3) dyeing the cotton fabric pretreated in the step (1) by using a disperse dye preparation through a disperse dye.

Preferably, in the step (1), the cotton fabric is soaked in the finishing liquid containing the etherified 2D resin for two times and is rolled for two times, the liquid carrying rate is 70-80%, the cotton fabric is dried for 3-10 minutes at 75-85 ℃, and is baked for 1.5-3 minutes at 170 ℃, and then the treated cotton fabric is taken out for water washing and drying at 75-85 ℃.

Preferably, the finishing liquid containing the etherified 2D resin further contains a penetrating agent and magnesium chloride, wherein the concentration of the etherified 2D resin is 100-200g/L, the concentration of the penetrating agent is 0.1-2g/L, and the concentration of the magnesium chloride is 10-40 g/L.

Preferably, in the finishing liquid containing etherified 2D resin, the concentration of the etherified 2D resin is 160g/L, the concentration of the penetrating agent is 0.2-1g/L, and the concentration of magnesium chloride is 20-30 g/L.

Preferably, in the step (2), the step of dyeing with the disperse dye includes: adding a cotton fabric into a disperse dye preparation, wherein the bath ratio is 1:10-50 ℃, the initial dyeing temperature is 30-60 ℃, then the temperature is raised at the heating rate of 1-3 ℃/min, the temperature is kept for dyeing for 40-80min after reaching 70-100 ℃, then the temperature is lowered at the cooling rate of 1-3 ℃/min, the temperature is lowered to below 50 ℃, then the cloth is taken out, and reduction cleaning is carried out.

Preferably, the disperse dye formulation is a disperse suspension of disperse dye in water, and the amount of the disperse dye is 0.5-5% of the mass of the cotton fabric.

Preferably, the disperse dye is at least one of disperse blue, disperse black, disperse gray, disperse red, disperse violet, disperse yellow and disperse orange.

Preferably, a leveling agent is also included in the disperse dye formulation.

Preferably, the leveling agent is used in an amount of 0.05% to 0.5% by mass of the disperse dye formulation.

Preferably, the solution used for reduction cleaning is a mixed aqueous solution of sodium hydrosulfite and caustic soda.

Preferably, the concentration of the sodium hydrosulfite in the solution for reduction cleaning is 0.5-4g/L, and the concentration of the caustic soda is 0.5-4 g/L.

In the disperse dye dyeing method of the cotton fabric, firstly, etherified 2D resin with a specific structure is used for carrying out non-ironing finishing on the cotton fabric, so that the non-ironing performance of the cotton fabric is improved; on the other hand, in the non-ironing finishing process, due to the fact that cross-linking reaction is conducted between etherified 2D resin and cotton fibers, hydroxyl groups of hydrophilic groups in the cotton fibers are replaced by hydrophobic groups, the hydrophobic groups have affinity to disperse dyes, and then the cotton fibers can be dyed by using a conventional disperse dye dyeing method.

Detailed Description

The following describes in detail specific embodiments of the present invention. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.

The disperse dye dyeing method of etherified 2D resin modified cotton fabric comprises the following steps:

(1) non-ironing pretreatment: carrying out non-ironing finishing on the cotton fabric by using etherified 2D resin as a non-ironing finishing agent;

(2) dyeing with a disperse dye: and (3) dyeing the cotton fabric pretreated in the step (1) by using a disperse dye preparation through a disperse dye.

In the method, the etherified 2D resin is a long-chain hydrophobic etherified resin. In a specific embodiment, the structural formula of the etherified 2D resin is shown as a formula (I),

wherein n is an integer of 3 to 5, and specifically may be 3, 4 or 5.

In the method of the present invention, preferably, the process of the permanent press finishing comprises: soaking and rolling the cotton fabric into finishing liquid containing etherified 2D resin for two times to ensure that the liquid carrying rate is 70-80%, drying at 75-85 ℃ for 3-10 minutes, and drying at 150-170 ℃ for 1.5-3 minutes, and then taking out the treated cotton fabric to carry out water washing and drying at 75-85 ℃.

The finishing liquid containing the etherified 2D resin preferably further contains a penetrant and magnesium chloride. In a specific embodiment, the concentration of the etherified 2D resin in the finishing liquid can be 100-200g/L, preferably 120-160 g/L; the concentration of the penetrant can be 0.1-2g/L, preferably 0.2-1 g/L; the concentration of magnesium chloride may be 10-40g/L, preferably 20-30 g/L.

In the present invention, the penetrant may be a conventionally used penetrant in the art, and may be, for example, a commercially available penetrant NR.

In the method of the present invention, the disperse dye dyeing in the step (2) may be performed by using a disperse dye dyeing process which is conventional in the art, as follows, a preferred disperse dye dyeing step in the present invention: adding the cotton fabric into a disperse dye preparation, wherein the bath ratio is 1:10-50, the initial dyeing temperature is 30-60 ℃, then heating up at the heating rate of 1-3 ℃/min, keeping the temperature and dyeing for 40-80min after the temperature reaches 70-100 ℃, then cooling down at the cooling rate of 1-3 ℃/min, taking out the fabric after the temperature is reduced to below 50 ℃, and reducing and cleaning.

In the dyeing operation, disperse dye dyeing is carried out on the cotton fabric by using a dip dyeing method, the cotton fabric is dipped in dyeing liquid, the dyeing liquid is heated at a certain speed to increase the temperature so as to control the dyeing uniformity and the dyeing quality, heat preservation dyeing is carried out after the dyeing liquid reaches a proper temperature, a certain temperature is given to a dyeing system, so that the gaps among cotton fiber molecules are increased, the dye molecules can enter the modified cotton fiber molecules more conveniently and can be filled, dyeing is realized, and the cotton fabric is cooled and reduced and cleaned after dyeing is finished.

In the present invention, the disperse dye formulation is a disperse suspension of disperse dye in water, and the amount of the disperse dye can be 0.5% -5% of the amount of cotton fabric, for example, can be 1%, 2%, 3% or 4%.

In the present invention, the disperse dye is not particularly limited, and disperse dyes that are conventional in the art can dye cotton fabrics according to the scheme of the present invention, for example, the disperse dye may be at least one of disperse blue, disperse black, disperse gray, disperse red, disperse violet, disperse yellow and disperse orange. According to the actual process requirements, disperse dye coloring agents with various dyeing effects are prepared.

In a preferred embodiment of the present invention, a leveling agent is also included in the disperse dye formulation; the amount of the leveling agent can be 0.05-0.5%, preferably 0.1-0.4%, and more preferably 0.15-0.3% of the mass of the disperse dye formulation. The dye is promoted to be uniformly dyed by adding a small amount of leveling agent.

After the disperse dye in the step (2) of the invention is used for dyeing, because the disperse dye can not be completely ensured to completely enter the cotton fiber during dyeing, and some disperse dye can be attached to the surface of the fiber, and the poor dyeing fastness can be caused without removing the loose color, reduction cleaning is needed, and the dye molecules which do not enter the cotton fiber are damaged by using a strong reducing agent, so that the color fastness is improved, and the chromatic light is improved.

In the invention, the solution used for reduction cleaning can be a mixed aqueous solution of sodium hydrosulfite and caustic soda;

further, the concentration of sodium hydrosulfite in the solution for reduction cleaning is 0.5-4g/L, preferably 1-3 g/L;

further, the concentration of caustic soda in the solution for reduction cleaning is 0.5-4g/L, preferably 1-3 g/L.

In the present invention, the conditions of the reductive cleaning include: the bath ratio may be 1:10-30 (e.g., may be 1:10, 1:15, 1:20, 1:25 or 1:30), the temperature may be 70-100 ℃ (e.g., may be 70 ℃, 80 ℃, 90 ℃ or 100 ℃), and the time may be 5-30min (e.g., may be 5min, 10min, 15min, 20min, 25min or 30 min).

The present invention will be described in detail below by way of examples, but the scope of the present invention is not limited thereto.