CN115161989A - A kind of lyocell knitted fabric refining and bleaching process - Google Patents

Abstract

The invention discloses a scouring and bleaching process for a Lyocell knitted fabric, and belongs to the technical field of textile printing and dyeing. The technical scheme is as follows: the fibrillation-proof auxiliary agent is used for processing before boiling and bleaching, and parameters of the scouring and bleaching process are controlled, so that the excellent fibrillation-proof effect of the lyocell knitted fabric is achieved. The method for pretreating the lyocell knitted fabric can reduce the fibrillation tendency of the lyocell knitted fabric in the boiling and bleaching process, prevent defects such as frosting, white spots, creases and the like, and improve the product quality and the one-time success rate of printing and dyeing.

Description

A kind of lyocell knitted fabric refining and bleaching process

technical field

The invention relates to the technical field of textile printing and dyeing, in particular to a scouring and bleaching process for lyocell knitted fabrics.

Background technique

Lyocell fiber is a regenerated cellulose fiber made of N-methylmorpholine-N-oxide (NMMO) as a solvent by wet-dry spinning. Lyocell fiber's unique pulp manufacturing technology and closed production process can recover more than 99.7% of the solvent and can be recycled. The production process is non-toxic and harmless, and the waste is biodegradable. It is a recognized green fiber. Lyocell fiber has high dry strength and wet strength, and the wet to dry strength ratio reaches more than 85%. Fiber blended or interwoven), and the fabric can withstand high warp and weft tensile forces during the textile printing and dyeing process without breaking. Lyocell fibers and fabrics have the same "comfort" as cotton, close to the "strength" of polyester, as well as the "beauty" of wool and the same "touch" and "soft drape" effect of silk, and are widely used in advanced textile fabrics Production. It can be spun pure, or blended or interwoven with natural fibers, synthetic fibers, and regenerated fibers to improve fabric style and wear performance and reduce production costs. Lyocell fibers also have broad application prospects in nonwovens and industrial filter cloths. Like other hydrophilic fibers, Lyocell fibers have good moisture absorption and swelling properties. However, the lateral swelling of lyocell fibers is higher, reaching 35%-40%. Therefore, swelling in water is very easy to occur, causing the fiber diameter to increase, resulting in a smaller distance between fibers, making the fabric stiff.

Lyocell fibers have unique fibrillation characteristics. After friction in the wet state, fibrils (microfibers) with a diameter of less than 1 μm will be split in the fiber axis. Using the fibrillating properties of Lyocell fibers, unique styles of peach skin fabrics can be produced. However, these tiny fibers have different light-scattering behaviors, which can cause printing and dyeing defects such as light color or "frost" or white lines or scratches in the fabric, especially under the conditions of damp heat, alkali and mechanical friction, the side of the fiber Swelling makes stiff fabrics more susceptible to fibrillation, leading to serious fabric quality problems.

Knitted fabric is a fabric formed by bending yarns into loops in sequence, and then looping the loops together. The process of forming a coil of yarn can be carried out horizontally or vertically. Horizontal weaving is called weft knitting fabric, and longitudinal weaving is called warp knitting fabric. The loop is the smallest basic unit of knitted fabric, and the loop is composed of the loop stem and the extension line in a space curve. The knitted fabric has great extensibility in all directions, good elasticity, good air permeability, soft hand feeling and easy deformation.

The dyeing and finishing of knitted fabrics is mainly based on the dipping method, that is, the fabric is immersed in a solution containing a treatment agent, and relying on the power of machinery, the fabric is driven to run continuously in the liquid and the treatment liquid is reciprocated for dyeing and finishing. Water acts as the main intermediary between the treatment agent and the fibers. Because the knitted fabric is soft and easy to deform, the dyeing and finishing process of the lyocell knitted fabric should use an air-flow dyeing machine or an overflow dyeing machine. The scouring and bleaching treatment of knitted fabrics has to go through several operation steps such as draining, adding water, adding materials, and heating and cooling. During the production process, the fabric is continuously and continuously rubbed against the cylinder wall, which is easier to fibrillate the lyocell fibers than the woven fabric.

Aiming at the quality problems that are prone to occur in the pre-processing of lyocell knitted fabrics, the main researches are as follows:

"Research on Cellulase Polishing Process of Tencel Dyeing Fabric" proposes a method of removing fibrils on the surface of lyocell fiber fabrics by using cellulase. This method can effectively remove the fibrils on the surface, but the cortex structure of lyocell fibers will be affected by damage, it is difficult to avoid fibrillation in the subsequent process. CN202011356829.7 proposes a lyocell fiber, an antigenic fibrosis cross-linking agent for lyocell fiber, and a method for treating lyocell fiber antigenic fibrosis. It can make lyocell fibers have stronger antigenic fibrosis ability, and create space for providing diversified lyocell fibers; CN202010817578.1 proposes a cross-linking agent and an antigenic fibrosis treatment method for lyocell fibers. The cross-linking agent used in the treatment method has the advantages of simple synthesis process, low price, low requirements for using equipment and high cross-linking effect. However, the above method is only applicable to the fibrillation treatment of lyocell fibers, because the difference in the structure of the lyocell fabric, such as the tightness, the surface texture of the fabric, and the yarn density, will affect the lateral swelling and surface friction coefficient of the lyocell fiber. Therefore, the above methods are difficult to avoid fibrillation of lyocell fabrics during scouring and bleaching.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is: overcoming the deficiencies of the prior art, providing a lyocell knitted fabric scouring and bleaching process, and pre-treatment of the lyocell knitted fabric can reduce the lyocell knitted fabric during the scouring and bleaching process. The tendency of fibrillation to prevent "frost", "white spots", creases and other defects, improve product quality and first-time success rate of printing and dyeing.

The technical scheme of the present invention is:

A lyocell knitted fabric refining and bleaching process, comprising the following steps:

(1) Fill the lyocell knitted fabric into water according to the bath ratio of 1:8~25, add lubricant 1~10 g/L, cleaning agent 0.5~2.0 g/L, adjust the pH to 7.0~9.5, and heat up to 70 ~95 ℃, treatment for 5~30 min, drain and wash;

(2) The lyocell knitted fabric treated in step (1) is poured into water according to the liquor ratio of 1:8~25, and 1~10 g/L of lubricant and 1~20 g/L of anti-fibrillation auxiliary are added. Adjust pH to 5.0~11.5, heat up to 50~95 °C, treat for 15~90 min, drain and wash;

(3) Water the lyocell knitted fabric treated in step (2) according to the liquor ratio of 1:8~25, add lubricant 1~10 g/L, refining agent 1~10 g/L, hydrogen peroxide stabilizer 1 ~10 g/L, hydrogen peroxide 4~15 g/L, whitening agent 0~10 g/L, adjust pH to 9.0~11.0, heat up to 90~95℃ after 5~20min treatment, heat preservation treatment for 30~90min, drain, clean;

(4) The lyocell knitted fabric treated in step (3) is fed into water according to the liquor ratio of 1:8-25, the pH is adjusted to 3-5, the temperature is 40-60°C, and after 10-20 minutes of treatment, drain water; According to the liquor ratio of 1:8~25, enter the water, add 0.1~5 g/L of deoxidizing enzyme, adjust the temperature to 40~60 °C, treat for 5~15 minutes, drain and dry.

Preferably, the lyocell knitted fabric is pure lyocell knitted fabric or a blended or interwoven knitted fabric of lyocell fibers and other fibers. More preferably, the refining and bleaching process steps of pure lyocell knitted fabrics, high-proportion lyocell knitted fabrics and lyocell knitted fabrics with high requirements for pilling and smoothness are (1) to (4), and other knitted fabrics can be omitted. Go to step (2).

Preferably, in steps (1), (2) and (3), the lubricant is octamethylcyclotetrasiloxane, allyl polyethylene glycol, polyethylene glycol, pentaerythritol, polyoxyethylene ether and A combination of one or more of sorbitan fatty acid esters.

Preferably, in step (1), the cleaning agent is fatty alcohol polyoxyethylene ether, fatty alcohol polyoxyethylene phenol ether, alkylphenol polyoxyethylene ether, sodium p-methoxy fatty acid amidobenzenesulfonate, N-oil In sodium acyl-N-methyl taurate, polyoxyethylene sorbitan fatty acid ester, coconut oil alkyl diethanolamide, sodium lauryl sulfonate and lauryl dimethylamine glycolide a combination of one or more.

Preferably, in step (2), the anti-fibrillation auxiliary agent is trimethylolpropane tris(3-mercaptopropionate), methyl etherified hexamethylol melamine, N,N-methylenebisacrylamide , Epichlorohydrin hexamethylenediamine polycondensate, ethylene urea substituted triazine compounds, cycloethylamine substituted triazine compounds, acrylate compounds, blocked isocyanates, aqueous polyurethane emulsions, aziridine compounds, citric acid , a combination of one or more of alkanetetracarboxylic acid and dimethylol dihydroxyethylene urea resin.

Preferably, in step (3), the refining agent is aliphatic alcohol ethoxylates, alkyl phosphates, isomeric carbon alkyl ethers, isomeric alkyl sulfates, alkyl aryl polyglycol ethers, polyoxyethylene One or more of vinyl ether esters, polyol-type surfactants, carboxylate-type anionic surfactants, sulfonate-type surfactants, sulfate-ester-type surfactants and phosphate-type surfactants combination of species.

Preferably, in step (3), the hydrogen peroxide stabilizer is sodium silicate, magnesium silicate, trisodium phosphate, sodium tripolyphosphate, polymetaphosphate, sodium polyphosphate, diethylaminepentaacetic acid (DTPA), N - A combination of one or more of hydroxyethylethylenediaminetriacetic acid.

Preferably, in step (3), the whitening agent is C.I. fluorescent whitening agent 9, C.I. fluorescent whitening agent 17, C.I. fluorescent whitening agent 47, C.I. fluorescent whitening agent 71, C.I. fluorescent whitening agent 85, C.I. fluorescent whitening agent A combination of one or more of Brightener 86 and C.I. Optical Brightener 134.

Compared with the prior art, the present invention has the following beneficial effects:

The pretreatment of the lyocell knitted fabric in the invention can reduce the fibrillation tendency of the lyocell knitted fabric during the scouring and bleaching process, prevent the occurrence of defects such as "frost", "white spot" and creases, and improve product quality And the one-time success rate of printing and dyeing.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. In other words, other drawings can also be obtained based on these drawings without creative labor.

Fig. 1 is the performance index of the lyocell fabric treated in Example 1 and Comparative Example 1 of the present invention.

Figure 2 is the performance index of the lyocell fabrics treated in Example 2 and Comparative Examples 2 and 3 of the present invention.

Figure 3 is the performance index of the lyocell fabrics treated in Example 3 and Comparative Examples 4 and 5 of the present invention.

Figure 4 is the performance index of the lyocell fabrics treated in Example 3 and Comparative Example 6 of the present invention.

Detailed ways

In order to make those skilled in the art better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example 1

Adopt the refining and bleaching process of the present invention to process pure lyocell knitted fabric, and the operation steps are as follows:

(1) Fill the lyocell knitted fabric into water according to the bath ratio of 1:15, add 2 g/L of allyl polyethylene glycol and 0.5 g/L of alkylphenol polyoxyethylene ether, adjust the pH to 7.0, and heat up. to 70 ℃, treated for 20 min, drained and washed;

(2) The lyocell knitted fabric treated in step (1) was poured into water according to the liquor ratio of 1:15, and the lubricant allyl polyethylene glycol 2 g/L and the anti-fibrillation assistant epichlorohydrin were added. 10 g/L of hexamethylenediamine polycondensate, adjusted to pH 9, heated to 80 °C, treated for 60 min, drained and cleaned;

(3) The lyocell knitted fabric treated in step (2) was fed into water according to the liquor ratio of 1:15, and 2 g/L of allyl polyethylene glycol, 4 g/L of fatty alcohol ethoxylate, and silicic acid were added. 4 g/L of magnesium, 4 g/L of hydrogen peroxide, 3 g/L of C.I. fluorescent whitening agent 17, adjusted pH to 10.0, treated for 10 min, heated to 92 °C, treated with heat for 50 min, drained and washed;

(4) The lyocell knitted fabric treated in step (3) was poured into water according to the liquor ratio of 1:15, acid was added to adjust the pH to 4, the temperature was 50 °C, and after 10 minutes of treatment, drained; according to the liquor ratio of 1:15 Into the water, add 2 g/L of deoxygenase, adjust the temperature to 50 °C, treat for 10 min, drain and dry.

Comparative Example 1

The process of Comparative Example 1 differs from the process of Example 1 in that: Comparative Example 1 lacks step (2).

The performance indicators of the pure lyocell fabrics treated in Example 1 and Comparative Example 1 are shown in Figure 1. It can be seen that the pure lyocell fabric of Comparative Example 1 has obvious fibrillation after scouring and bleaching, while Example 1 was treated with an anti-fibrillation auxiliary before scouring and bleaching, and no fibrillation occurred after scouring and bleaching. This is because: Lyocell fiber has better moisture absorption and swelling properties than cellulose fibers such as cotton, hemp and viscose, especially the lateral swelling degree is higher, which can reach 35%~40%, so it is easy to occur in water. Swelling, causing the fiber diameter to increase, resulting in a smaller distance between fibers, making the fabric stiff and fibrillation. After friction, fibrils (microfibers) with a diameter of less than 1 μm will be split in the fiber axis. These microfibers have Different light scattering behaviors will cause the fabrics to appear light-colored or "frost" or white lines or scratches and other printing and dyeing defects, especially under the conditions of damp heat, alkali and mechanical friction, the lateral swelling of the fibers makes the fabric stiff More prone to fibrillation, leading to serious fabric quality issues. The lyocell fiber has an obvious skin-core structure, and its skin layer is easily destroyed in the step (3) of Example 1, but using the step (2) of Example 1 to treat the lyocell fabric can strengthen the lateral direction of the fiber. The interaction between macromolecular chains reduces the lateral swelling rate, prevents the damage of the cortex, and reduces the tendency of fibrillation.

Example 2

Adopting the scouring and bleaching process of the present invention to handle the knitted fabric with a cotton/lyocell blending ratio of 30/70, the operation steps are as follows:

(1) Fill the lyocell knitted fabric into water according to the bath ratio of 1:20, add polyoxyethylene ether and sorbitan fatty acid ester 4 g/L, fatty alcohol polyoxyethylene phenol ether 1.0 g/L, adjust pH was 8.0, the temperature was raised to 80 °C, treated for 30 min, drained, and washed;

(2) The lyocell knitted fabric treated in step (1) was introduced into water according to the liquor ratio of 1:20, and 4 g/L of polyoxyethylene ether and sorbitan fatty acid ester, and acrylic acid, an anti-fibrillation additive, were added. Ester compound 15 g/L, adjusted to pH 8.5, heated to 80 °C, treated for 40 min, drained and washed;

(3) The lyocell knitted fabric treated in step (2) was fed into water according to the liquor ratio of 1:20, polyoxyethylene ether and sorbitan fatty acid ester 4 g/L, isomerized alkyl sulfate 6 g/L were added. g/L, sodium tripolyphosphate 6 g/L, hydrogen peroxide 8 g/L, C.I. fluorescent whitening agent 85 was 5 g/L, pH was adjusted to 9.0, and the temperature was raised to 95 °C after 20 min of treatment, kept for 70 min, and drained. , cleaning;

(4) The lyocell knitted fabric treated in step (3) was poured into water according to the bath ratio of 1:20, acid was added to adjust the pH to 5, the temperature was 60 °C, and after 20 minutes of treatment, drain water; according to the bath ratio of 1:20 Into the water, add 3 g/L of deoxygenase, adjust the temperature to 60 °C, treat for 15 min, drain and dry.

Comparative Example 2

The difference between the process of Comparative Example 2 and the process of Example 2 is that the pH of step (2) in Comparative Example 2 is 4, and other operating conditions are the same.

Comparative Example 3

The difference between the process of Comparative Example 3 and the process of Example 2 is that the pH of step (2) in Comparative Example 3 is 10, and other operating conditions are the same.

The performance indicators of the pure lyocell fabrics treated in Example 2 and Comparative Examples 2 and 3 are shown in Figure 2. It can be seen that when the pH of step (2) is 4 and 10, the lyocell fabrics all appear obvious. fibrillation phenomenon, and when the pH of step (2) is 8.5, the lyocell fabric has a higher anti-fibrillation effect. This is because, on the one hand, when the pH of the acrylate anti-fibrillation additive is 8.5, the acrylate can have a higher reaction efficiency between the cellulose macromolecular chains, which can effectively enhance the interaction force between fibers; on the other hand, Acrylates can form a film on the fiber surface and can protect Lyocell fibers from fibrils when they are subjected to friction. When the pH increases to 10, due to the sharp increase in lateral swelling of lyocell fibers and the large distance between macromolecular chains, it is difficult for acrylate to form bridging and cross-linking between the two molecular chains. The effect is not good.

Example 3

Adopting the scouring and bleaching process of the present invention to handle the knitted fabric with a cotton/lyocell blending ratio of 30/70, the operation steps are as follows:

(1) The lyocell knitted fabric was poured into water according to the liquor ratio of 1:18, added with 6 g/L of pentaerythritol and 1.5 g/L of sodium p-methoxy-fatty amidobenzenesulfonate, adjusted the pH to 9.0, and heated up to 90 ℃, treated for 10 min, drained and cleaned;

(2) The lyocell knitted fabric treated in step (1) was introduced into water according to the liquor ratio of 1:18, 6 g/L of pentaerythritol and 8 g/L of blocked isocyanate were added, the pH was adjusted to 6.5, and the temperature was raised to 60 °C, Treat for 45 min, drain and wash;

(3) The lyocell knitted fabric treated in step (2) was poured into water according to the liquor ratio of 1:18, and 6 g/L of pentaerythritol, 5 g/L of carboxylate-type anionic surfactant, and 3 g of sodium silicate were added. /L, hydrogen peroxide 5 g/L, C.I. fluorescent whitening agent 134 to 10 g/L, adjust pH to 10.0, heat up to 95 °C after 10 min of treatment, heat preservation for 70 min, drain and clean;

(4) The lyocell knitted fabric treated in step (3) was poured into water according to the liquor ratio of 1:18, the pH was adjusted to 5 by adding acid, the temperature was 60 °C, and after 15 minutes of treatment, drained; according to the liquor ratio of 1:18 Into the water, add 3 g/L of deoxygenase, adjust the temperature to 55 °C, treat for 8 minutes, drain and dry.

Comparative Example 4

The difference between the process of Comparative Example 4 and the process of Example 2 is that the processing temperature of step (2) in Comparative Example 4 is room temperature, and other operating conditions are the same.

Comparative Example 5

The difference between the process of Comparative Example 5 and the process of Example 2 is that the processing temperature of step (2) in Comparative Example 5 is 95° C., and other operating conditions are the same.

The performance indicators of the pure lyocell fabrics treated in Example 3 and Comparative Examples 4 and 5 are shown in Figure 3. It can be seen that when the treatment temperature of step (2) is room temperature and 95 ℃, the lyocell fabric appears The fibrillation phenomenon is obvious, and when the treatment temperature of step (2) is 70 °C, the lyocell fabric has a higher anti-fibrillation effect. This is because when the temperature is too low, the reaction efficiency of the anti-fibrillation auxiliary is low; when the temperature is too high, the swelling degree of the lyocell fibers increases, and the anti-fibrillation auxiliary is difficult to effectively react between the fibers.

Comparative Example 6

The difference between the process of Comparative Example 6 and the process of Example 3 is that no lubricant is added in steps (1), (2) and (3) in Comparative Example 6, and other operating conditions are the same.

The performance indicators of the cotton/lyocell blended fabrics treated in Example 3 and Comparative Example 6 with a blend ratio of 30/70 are shown in Figure 4. It can be seen that when steps (1), (2) and (3) are used When no lubricant was added, the knitted fabric exhibited significant fibrillation, while when lubricant was added in Example 3, the fibrillation tendency of the knitted fabric was significantly lower. This is because, on the one hand, the lubricant has a good hydration effect, which can adhere to the surface of the fabric, increase the thickness of the hydration layer on the surface of the fabric, and reduce the friction coefficient between fabrics and between fabrics and equipment; on the other hand, lubricant and There is an interaction between the anti-fibrillation auxiliary agents, which can promote the penetration of the anti-fibrillation auxiliary agent into the fiber, so that the anti-fibrillation auxiliary agent can more fully react with the macromolecular chain of the fiber.

Although the present invention has been described in detail in conjunction with the preferred embodiments with reference to the accompanying drawings, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, those of ordinary skill in the art can make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions should all fall within the scope of the present invention/any Those skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should all be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (8)

1. A scouring and bleaching process for a Lyocell knitted fabric is characterized by comprising the following steps:

(1) The lyocell knitted fabric gray fabric is prepared by the following steps of: 8-25 g/L of water is added, 1-10 g/L of lubricant and 0.5-2.0 g/L of cleaning agent are added, the pH is adjusted to 7.0-9.5, the temperature is increased to 70-95 ℃, the mixture is treated for 5-30 min, and water is drained and cleaned;

(2) The lyocell knitted fabric treated in the step (1) is processed according to the bath ratio of 1:8 to 25 g/L of water is filled, 1 to 10g/L of lubricant and 1 to 20 g/L of fibrillation-preventing assistant are added, the pH is adjusted to be 5.0 to 11.5, the temperature is increased to 50 to 95 ℃, the mixture is processed for 15 to 90 min, and water is drained and washed;

(3) And (3) enabling the lyocell knitted fabric treated in the step (2) to be processed according to a bath ratio of 1:8 to 25 g/L of water is added, 1 to 10g/L of lubricant, 1 to 10g/L of refining agent, 1 to 10g/L of hydrogen peroxide stabilizer, 4 to 15 g/L of hydrogen peroxide and 0 to 10g/L of brightener are added, the pH is adjusted to be 9.0 to 11.0, the mixture is treated for 5 to 20min and then heated to 90 to 95 ℃, the mixture is subjected to heat preservation treatment for 30 to 90 min, and the mixture is drained and cleaned;

(4) And (3) enabling the lyocell knitted fabric treated in the step (3) to be processed according to a bath ratio of 1:8 to 25, feeding water, adjusting the pH to 3~5, controlling the temperature to be 40 to 60 ℃, processing for 10 to 20min, and then draining; according to the bath ratio of 1: and (3) feeding water from 8 to 25, adding 0.1 to 5g/L of oxygen removing enzyme, adjusting the temperature to be 40 to 60 ℃, treating for 5 to 15 min, draining, and drying.

2. The lyocell knit scouring and bleaching process according to claim 1, wherein the lyocell knit is a pure lyocell knit or a blend or interwoven knit of lyocell fibers with other fibers.

3. The process for scouring and bleaching lyocell knitted fabric according to claim 1, wherein in steps (1), (2) and (3), the lubricant is one or more of octamethylcyclotetrasiloxane, allyl polyethylene glycol, pentaerythritol, polyoxyethylene ether and sorbitan fatty acid ester.

4. The process for scouring and bleaching lyocell knitted fabrics according to claim 1, wherein in the step (1), the cleaning agent is one or a combination of fatty alcohol-polyoxyethylene ether, fatty alcohol-polyoxyethylene phenol ether, alkylphenol ethoxylate, sodium p-methoxyfatty amide benzene sulfonate, sodium N-oleoyl-N-methyltaurate, polyoxyethylene sorbitan fatty acid ester, coconut oil alkyl diethanolamide, sodium dodecyl sulfonate and dodecyl dimethyl amine ethyl lactone.

5. The scouring and bleaching process for lyocell knitted fabric according to claim 1, wherein in the step (2), the fibrillation-preventing auxiliary agent is one or more of trimethylolpropane tri (3-mercaptopropionate), methylated hexamethylolmelamine, N-methylenebisacrylamide, condensation polymer of epichlorohydrin and hexamethylenediamine, ethylene urea-substituted triazine compound, cyclic ethylamine substituted triazine compound, acrylate compound, blocked isocyanate, aqueous polyurethane emulsion, aziridine compound, citric acid, alkane tetracarboxylic acid and dimethylol dihydroxy ethylene urea resin.

6. The process for scouring and bleaching lyocell knitted fabrics according to claim 1, wherein in step (3), the refining agent is one or a combination of more of fatty alcohol ethoxylates, alkyl phosphates, isomeric carbon alkyl ethers, isomeric alkyl sulfates, alkylaryl polyglycol ethers, polyoxyethylene ether acid esters, polyol-type surfactants, carboxylate-type anionic surfactants, sulfonate-type surfactants, sulfate-type surfactants and phosphate-type surfactants.

7. The process for scouring and bleaching lyocell knitted fabric according to claim 1, wherein in the step (3), the hydrogen peroxide stabilizer is one or more of sodium silicate, magnesium silicate, trisodium phosphate, sodium tripolyphosphate, polymetaphosphate, sodium polyphosphate, diethylenepentaacetic acid (DTPA) and N-hydroxyethyl ethylenediamine triacetic acid.

8. The process for scouring and bleaching lyocell knitted fabric according to claim 1, wherein in step (3), the whitening agent is one or a combination of more of c.i. fluorescent brightener 9, c.i. fluorescent brightener 17, c.i. fluorescent brightener 47, c.i. fluorescent brightener 71, c.i. fluorescent brightener 85, c.i. fluorescent brightener 86 and c.i. fluorescent brightener 134.

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