CN115161989A - Scouring and bleaching process for Lyocell knitted fabric - Google Patents
Scouring and bleaching process for Lyocell knitted fabric Download PDFInfo
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- CN115161989A CN115161989A CN202211070039.1A CN202211070039A CN115161989A CN 115161989 A CN115161989 A CN 115161989A CN 202211070039 A CN202211070039 A CN 202211070039A CN 115161989 A CN115161989 A CN 115161989A
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
- D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
- D06L4/10—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which develop oxygen
- D06L4/13—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which develop oxygen using inorganic agents
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
- D06L1/00—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods
- D06L1/12—Dry-cleaning or washing fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods using aqueous solvents
- D06L1/16—Multi-step processes
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
- D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
- D06L4/10—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which develop oxygen
- D06L4/12—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which develop oxygen combined with specific additives
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- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
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
Technical Field
The invention relates to the technical field of textile printing and dyeing, in particular to a scouring and bleaching process for a Lyocell knitted fabric.
Background
The lyocell fiber is a regenerated cellulose fiber prepared by a wet-dry spinning method by using N-methylmorpholine-N-oxide (NMMO) as a solvent. The unique pulp manufacturing technology and closed production process of the lyocell fibers enable the solvent to be recovered by more than 99.7 percent and can be recycled, the production process is non-toxic and harmless, the wastes can be biodegraded, and the lyocell fibers are recognized green fibers. The lyocell fiber has high dry strength and wet strength, the wet-dry strength ratio reaches more than 85 percent, the lyocell fiber not only has excellent spinnability (can be pure spun, but also can be blended or interwoven with fibers such as cotton, wool, silk, hemp, chemical fiber, cashmere and the like), but also can bear higher warp-direction and weft-direction stretching force in the textile printing and dyeing process so as not to break. The lyocell fiber and the fabric have the comfort as cotton, the strength as close as that of terylene, the common aesthetic feeling of wool as the touch and soft falling effects as real silk, and are widely used for the production of high-grade textile fabrics. It can be spun, or blended or interwoven with natural fiber, synthetic fiber and regenerated fiber to improve fabric style and wearability and reduce production cost. The lyocell fiber also has wide application prospect in the aspects of non-weaving, industrial filter cloth and the like. Lyocell fibers, like other hydrophilic fibers, have good hygroscopic swelling properties. However, the lyocell fibers have a high degree of lateral swelling, up to 35% to 40%. Therefore, swelling is highly likely to occur in water, causing an increase in fiber diameter, resulting in a decrease in inter-fiber distance, and making the fabric stiff.
Lyocell fibers have a unique fibrillation property and undergo friction in a wet state to split fibrils (microfibers) having a diameter of less than 1 μm in the axial direction of the fiber. By utilizing the fibrillation characteristic of the lyocell fiber, the peach skin fabric with unique style can be produced. However, these microfibers have different light scattering behavior, which can cause fabric dyeing defects such as light color or "frost" or white lines or scratches, and especially under wet heat, alkaline and mechanical rubbing conditions, the lateral swelling of the fibers makes stiff fabrics more susceptible to fibrillation, resulting in severe fabric quality problems.
The knitted fabric is formed by sequentially bending yarns into loops and interlooping the loops. The process of forming the yarn into loops may be performed in either the cross direction or the machine direction, with cross direction knitting being referred to as weft knitting and machine direction knitting being referred to as warp knitting. The loop is the smallest basic unit of the knitted fabric, and the loop is formed by a loop stem and an extension line which form a space curve. The knitted fabric has the advantages of large extensibility in all directions, good elasticity, good air permeability, soft hand feeling and easy deformation.
The dyeing and finishing of the knitted fabric is mainly carried out in a dipping mode, namely, the knitted fabric is dipped in a solution containing a treating agent, and the knitted fabric is continuously driven to run in the liquid and the treating solution is circulated repeatedly to carry out dyeing and finishing under the action of mechanical power. Water acts as the primary vehicle between the treating agent and the fiber. Because the knitted fabric is soft and easy to deform, an airflow dyeing machine or an overflow dyeing machine is suitable for dyeing and finishing the lyocell knitted fabric. The boiling and bleaching treatment of the knitted fabric comprises the operation steps of discharging liquid, adding water, feeding, heating, cooling and the like for many times. During production, the fabric is continuously rubbed against the cylinder walls, more readily fibrillating lyocell fibers than woven fabrics.
Aiming at the quality problem which is easy to appear in the pretreatment processing of the lyocell knitted fabric, the following researches are mainly carried out at present:
the research on cellulase polishing process of tencel dyed fabric proposes a method for removing surface fibrils of lyocell fabric by using cellulase, wherein the method can effectively remove the surface fibrils, but the cortex structure of the lyocell fabric is damaged, so that the fibrillation is difficult to avoid in the subsequent process. CN202011356829.7 proposes a lyocell fiber, an antigen fibrillation cross-linking agent for the lyocell fiber and a treatment method for antigen fibrillation of the lyocell fiber, and the lyocell fiber can have stronger antigen fibrillation capability by padding the lyocell fiber with a specific cross-linking agent solution for multiple times, thereby creating a space for providing diversified lyocell fibers; CN202010817578.1 provides a cross-linking agent and an antigen fibrillation treatment method of lyocell fibers, and the cross-linking agent used in the treatment method has the advantages of simple synthesis process, low price, low requirement on used equipment and higher cross-linking effect. However, the above method is only suitable for fibrillation treatment of lyocell fabric, and because structural differences such as tightness, fabric surface texture, yarn density and the like of the lyocell fabric have an influence on lateral swelling and surface friction coefficient of the lyocell fabric, it is difficult to avoid fibrillation of the lyocell fabric during the scouring and bleaching treatment.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the scouring and bleaching process for the Lyocell knitted fabric overcomes the defects of the prior art, the pretreatment is carried out on the Lyocell knitted fabric, the fibrillation tendency of the Lyocell knitted fabric in the scouring and bleaching process can be reduced, defects such as frosting, white spots, creases and the like are prevented, and the product quality and the one-time success rate of printing and dyeing are improved.
The technical scheme of the invention is as follows:
a scouring and bleaching process for a Lyocell knitted fabric comprises 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: 8-25 of water is added, 1-10 g/L of lubricant and 1-20 g/L of anti-fibrillation auxiliary agent are added, the pH is adjusted to be 5.0-11.5, the temperature is increased to 50-95 ℃, the treatment is carried out for 15-90 min, and water is drained and cleaned;
(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: feeding water in the range of 8 to 25, adjusting the pH value to 3~5 and the temperature to be 40 to 60 ℃, treating for 10 to 20min, and then draining water; according to the bath ratio of 1: and (3) water is filled in from 8 to 25, 0.1 to 5g/L of an oxygen scavenging enzyme is added, the temperature is adjusted to be from 40 to 60 ℃, the mixture is processed for 5 to 15 min, and water is drained and dried.
Preferably, the lyocell fabric is a pure lyocell fabric or a blend or interwoven fabric of lyocell fibers and other fibers. More preferably, the scouring and bleaching process steps of the pure Rassel knitted fabric, the high-proportion Rassel knitted fabric and the Rassel knitted fabric with high requirements on pilling and smoothness are (1) - (4), and the step (2) can be omitted for other knitted fabrics.
Preferably, 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.
Preferably, in the step (1), the cleaning agent is one or a combination of more of fatty alcohol-polyoxyethylene ether, fatty alcohol-polyoxyethylene phenol ether, alkylphenol polyoxyethylene ether, sodium p-methoxy fatty 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.
Preferably, in the step (2), the anti-fibrillation auxiliary agent is one or more of trimethylolpropane tri (3-mercaptopropionate), methylated hexamethylol melamine, N-methylene bisacrylamide, a polycondensate of epichlorohydrin and hexamethylene diamine, an ethylene urea substituted triazine compound, a cyclic ethylamine group substituted triazine compound, an acrylate compound, a blocked isocyanate, an aqueous polyurethane emulsion, an aziridine compound, citric acid, alkane tetracarboxylic acid and a dimethylol dihydroxy ethylene urea resin.
Preferably, in the step (3), the refining agent is one or more of fatty alcohol ethoxylate, alkyl phosphate, isomeric carbon alkyl ether, isomeric alkyl sulfate, alkylaryl polyglycol ether, polyoxyethylene ether acid ester, polyol type surfactant, carboxylate type anionic surfactant, sulfonate type surfactant, sulfate type surfactant and phosphate type surfactant.
Preferably, in step (3), the hydrogen peroxide stabilizer is one or more of sodium silicate, magnesium silicate, trisodium phosphate, sodium tripolyphosphate, polymetaphosphate, sodium polyphosphate, diethylenetriamine pentaacetic acid (DTPA) and N-hydroxyethyl ethylenediamine triacetic acid.
Preferably, in step (3), the brightener 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.
Compared with the prior art, the invention has the following beneficial effects:
the pretreatment is carried out on the lyocell knitted fabric, the fibrillation tendency of the lyocell knitted fabric in the boiling and bleaching process can be reduced, defects such as frosting, white spots and creases are prevented, and the product quality and the primary success rate of printing and dyeing are improved.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a graph showing the performance index of the lyocell fabrics treated in example 1 and comparative example 1 of the present invention.
FIG. 2 is a graph showing the performance index of the lyocell fabric treated in example 2 of the present invention and comparative examples 2 and 3.
FIG. 3 is a graph showing the performance index of the lyocell fabric treated in example 3 of the present invention and comparative examples 4 and 5.
FIG. 4 is a graph showing the performance indexes of the lyocell fabrics treated in example 3 and comparative example 6 of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all 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.
Example 1
The pure Lyocell knitted fabric is treated by the scouring and bleaching process, and the operation steps are as follows:
(1) The lyocell knitted fabric gray fabric is prepared by the following steps of: 15, adding allyl polyethylene glycol 2 g/L and alkylphenol polyoxyethylene 0.5 g/L, adjusting the pH to 7.0, heating to 70 ℃, treating for 20min, draining and cleaning;
(2) The lyocell knitted fabric treated in the step (1) is processed according to the bath ratio of 1:15, adding a lubricant, namely allyl polyethylene glycol 2 g/L and an anti-fibrillation auxiliary agent, namely epichlorohydrin hexamethylene diamine polycondensate 10g/L, adjusting the pH to 9, heating to 80 ℃, treating for 60 min, draining and cleaning;
(3) And (3) enabling the lyocell knitted fabric treated in the step (2) to be processed according to a bath ratio of 1:15, adding water, adding allyl polyethylene glycol 2 g/L, fatty alcohol ethoxy compound 4 g/L, magnesium silicate 4 g/L, hydrogen peroxide 4 g/L, C.I. fluorescent whitening agent 17 of 3 g/L, adjusting pH to 10.0, heating to 92 ℃ after 10 min treatment, carrying out heat preservation treatment for 50 min, draining and cleaning;
(4) And (3) enabling the lyocell knitted fabric treated in the step (3) to be processed according to a bath ratio of 1:15, feeding water, adding acid to adjust the pH value to 4 and the temperature to 50 ℃, treating for 10 min, and draining; according to the bath ratio of 1:15, adding 2 g/L of deoxyenzyme, adjusting the temperature to 50 ℃, treating for 10 min, draining, and drying.
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 index of the treated pure lyocell fabrics of example 1 and comparative example 1 is shown in fig. 1, and it can be seen that the pure lyocell fabric of comparative example 1 undergoes a significant fibrillation phenomenon after scouring and bleaching, whereas example 1 is treated with an anti-fibrillation aid before scouring and bleaching, and does not undergo a fibrillation phenomenon after scouring and bleaching. This is because: compared with cellulose fibers such as cotton, hemp, viscose and the like, lyocell fibers have better moisture absorption swelling performance, particularly have higher lateral swelling degree which can reach 35-40%, so that the lyocell fibers are easy to swell in water, the fiber diameter is increased, the distance between fibers is reduced, the fabric becomes rigid and fibrillating, fibrils (tiny fibers) with the diameter of less than 1 mu m can be split in the axial direction of the fibers through friction, the tiny fibers have different light scattering behaviors, the fabric can have printing and dyeing defects such as light color, frost flowers, white lines or scratches, and the like, particularly under the conditions of moist heat, alkalinity and mechanical friction, the lateral swelling of the fibers enables the rigid fabric to be more easily fibrillated, and the serious quality problem of the fabric is caused. While lyocell fibers have a significant sheath-core structure and the sheath layer is easily destroyed in step (3) of example 1, treatment of lyocell fabric in step (2) of example 1 enhances the interaction between the lateral macromolecular chains of the fibers, reduces the lateral swelling ratio, prevents the sheath layer from being destroyed, and reduces the fibrillation tendency.
Example 2
The scouring and bleaching process is adopted to treat the knitted fabric with the cotton/Lyocell blending ratio of 30/70, and the operation steps are as follows:
(1) The lyocell knitted fabric gray fabric is prepared by the following steps of: 20, feeding water, adding polyoxyethylene ether and sorbitan fatty acid ester 4 g/L and fatty alcohol polyoxyethylene phenol ether 1.0 g/L, adjusting the pH to 8.0, heating to 80 ℃, treating for 30 min, draining water and cleaning;
(2) The lyocell knitted fabric treated in the step (1) is processed according to the bath ratio of 1:20, feeding water, adding polyoxyethylene ether and sorbitan fatty acid ester 4 g/L and fibrillation-preventing auxiliary agent acrylate compound 15 g/L, adjusting the pH to 8.5, heating to 80 ℃, treating for 40 min, draining water and cleaning;
(3) And (3) enabling the lyocell knitted fabric treated in the step (2) to be processed according to a bath ratio of 1:20, feeding water, adding polyoxyethylene ether and sorbitan fatty acid ester 4 g/L, isomeric alkyl sulfate 6 g/L, sodium tripolyphosphate 6 g/L, hydrogen peroxide 8 g/L, C.I. fluorescent whitening agent 85 of 5g/L, adjusting the pH to 9.0, heating to 95 ℃ after 20min treatment, carrying out heat preservation treatment for 70 min, draining and cleaning;
(4) And (3) enabling the lyocell knitted fabric treated in the step (3) to be processed according to a bath ratio of 1:20, feeding water, adding acid to adjust the pH value to 5 and the temperature to 60 ℃, treating for 20min, and draining; according to the bath ratio of 1:20, feeding water, adding deoxyenzyme 3 g/L, adjusting the temperature to 60 ℃, treating for 15 min, draining water and drying.
Comparative example 2
The process of comparative example 2 differs from the process of example 2 in that: the pH in step (2) of comparative example 2 was 4, and the other operating conditions were consistent.
Comparative example 3
The process of comparative example 3 differs from the process of example 2 in that: the pH in step (2) of comparative example 3 was 10, and the other operating conditions were the same.
The performance index of the treated pure lyocell fabric of example 2 and comparative examples 2 and 3 is shown in fig. 2, and it can be seen that significant fibrillation occurs in the lyocell fabric when the pH of step (2) is 4 and 10, while the lyocell fabric has a high anti-fibrillation effect when the pH of step (2) is 8.5. On one hand, when the pH value of the acrylate anti-fibrillation auxiliary agent is 8.5, the acrylate can have higher reaction efficiency among cellulose macromolecular chains, and the interaction force among fibers can be effectively enhanced; on the other hand, the acrylate can form a film on the surface of the fiber, and can protect lyocell fibers from fibril generation when the lyocell fibers are subjected to friction. When the pH value is increased to 10, the lateral swelling property of the lyocell fiber is sharply increased, the distance between macromolecular chains is large, and the acrylic ester is difficult to form bridging crosslinking between the two macromolecular chains, so the fibrillation prevention effect is poor.
Example 3
The scouring and bleaching process is adopted to treat the knitted fabric with the cotton/Lyocell blending ratio of 30/70, and the operation steps are as follows:
(1) The lyocell knitted fabric gray fabric is prepared by the following steps of: 18, adding pentaerythritol 6 g/L and sodium p-methoxy fatty amide benzene sulfonate 1.5 g/L, adjusting the pH to 9.0, heating to 90 ℃, treating for 10 min, draining and cleaning;
(2) The lyocell knitted fabric treated in the step (1) is processed according to the bath ratio of 1:18, feeding water, adding pentaerythritol 6 g/L and blocked isocyanate 8 g/L, adjusting the pH to 6.5, heating to 60 ℃, treating for 45 min, draining and cleaning;
(3) And (3) enabling the lyocell knitted fabric treated in the step (2) to be subjected to treatment according to a bath ratio of 1:18, adding pentaerythritol 6 g/L, carboxylate anionic surfactant 5g/L, sodium silicate 3 g/L and hydrogen peroxide 5g/L into water, adjusting the pH to 10.0, heating to 95 ℃ after 10 min treatment, carrying out heat preservation treatment for 70 min, draining and cleaning;
(4) And (3) enabling the lyocell knitted fabric treated in the step (3) to be processed according to a bath ratio of 1:18, feeding water, adding acid to adjust the pH value to 5 and the temperature to 60 ℃, treating for 15 min, and draining; according to the bath ratio of 1:18, adding water, adding deoxyenzyme 3 g/L, adjusting the temperature to 55 ℃, treating for 8 min, draining water and drying.
Comparative example 4
The process of comparative example 4 differs from the process of example 2 in that: the treatment temperature in step (2) in comparative example 4 was room temperature, and the other operation conditions were consistent.
Comparative example 5
The process of comparative example 5 differs from the process of example 2 in that: the treatment temperature in step (2) of comparative example 5 was 95 ℃ and the other operating conditions were the same.
The performance indexes of the pure lyocell fabrics treated in example 3 and comparative examples 4 and 5 are shown in fig. 3, and it can be seen that the lyocell fabric shows a significant fibrillation phenomenon when the treatment temperature of step (2) is room temperature and 95 c, and has a high anti-fibrillation effect when the treatment temperature of step (2) is 70 c. This is because, when the temperature is too low, the reaction efficiency of the anti-fibrillation aid is low; when the temperature is too high, the swelling degree of the lyocell fibers increases, and the fibrillation-preventing auxiliary agent is difficult to react effectively between the fibers.
Comparative example 6
The process of comparative example 6 differs from the process of example 3 in that: in comparative example 6, no lubricant was added in steps (1), (2) and (3), and the other operating conditions were consistent.
The performance index of the knitted fabric having a cotton/lyocell blend ratio of 30/70 treated in example 3 and comparative example 6 is shown in fig. 4, and it can be seen that the knitted fabric shows a significant fibrillation phenomenon when no lubricant is added in steps (1), (2) and (3), while the fibrillation tendency of the knitted fabric is significantly lower when a lubricant is added in example 3. The lubricant has good hydration effect, can be attached to the surface of the fabric, increases the thickness of the hydration layer on the surface of the fabric, and reduces the friction coefficient between the fabrics and between the fabric and equipment; on the other hand, the lubricant and the anti-fibrillation auxiliary agent have interaction, so that the anti-fibrillation auxiliary agent can be promoted to permeate into the fiber, and the anti-fibrillation auxiliary agent can be more fully reacted with the fiber macromolecular chains.
Although the present invention has been described in detail by referring to the drawings in connection with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications or substitutions are within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to 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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| Application Number | Priority Date | Filing Date | Title |
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| CN202211070039.1A CN115161989A (en) | 2022-09-02 | 2022-09-02 | Scouring and bleaching process for Lyocell knitted fabric |
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| CN202211070039.1A CN115161989A (en) | 2022-09-02 | 2022-09-02 | Scouring and bleaching process for Lyocell knitted fabric |
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| CN115161989A true CN115161989A (en) | 2022-10-11 |
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| CN113930961A (en) * | 2021-11-12 | 2022-01-14 | 广东溢达纺织有限公司 | Tencel fiber and white yarn processing method thereof |
| CN115772811A (en) * | 2022-11-25 | 2023-03-10 | 青岛大学 | Cold pad-batch dyeing process capable of preventing lyocell woven fabric from fibrillation |
| CN117090052A (en) * | 2023-06-30 | 2023-11-21 | 广东德美精细化工集团股份有限公司 | Preparation method of antigen fibrillated lyocell fibers |
| CN117364330A (en) * | 2023-10-10 | 2024-01-09 | 诸暨市维纳斯针纺有限公司 | Anti-pilling environment-friendly fabric |
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| CN117364330A (en) * | 2023-10-10 | 2024-01-09 | 诸暨市维纳斯针纺有限公司 | Anti-pilling environment-friendly fabric |
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