CN112626890A - Process for improving color fastness of Hissel and Lyocell fiber cheese dyeing - Google Patents
Process for improving color fastness of Hissel and Lyocell fiber cheese dyeing Download PDFInfo
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- CN112626890A CN112626890A CN202011079771.6A CN202011079771A CN112626890A CN 112626890 A CN112626890 A CN 112626890A CN 202011079771 A CN202011079771 A CN 202011079771A CN 112626890 A CN112626890 A CN 112626890A
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/445—Use of auxiliary substances before, during or after dyeing or printing
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/38—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using reactive dyes
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/96—Dyeing characterised by a short bath ratio
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
- D06P3/58—Material containing hydroxyl groups
- D06P3/60—Natural or regenerated cellulose
- D06P3/66—Natural or regenerated cellulose using reactive dyes
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
- D06P5/02—After-treatment
Abstract
The invention discloses a process for improving dyeing color fastness of Hissel and lyocell fiber cheese, which belongs to the field of dyeing of Hissel and lyocell fibers, and comprises the specific steps of pretreatment, dyeing, aftertreatment and fixation softening treatment, aiming at the characteristics of raw materials of Hissel and lyocell fibers, the color fastness problem of salt-free reactive dye dyeing on the Hissel and lyocell fibers is solved, and the color fastness is further improved on the basis of a rayon salt-free reactive dye dyeing process; the process technology is simple and uncomplicated and is the basis for the derivation of future process technology; the salt consumption and pollution are reduced, and the worldwide problem of sewage treatment is reduced; the labor intensity of workers is reduced, the requirement of clean production of green fibers is completely met, the green technology upgrading and idea of national industrial technology are solved, the environment-friendly supply idea of luxury goods is also met, and the environment-friendly new breakthrough of the green fibers under the clean production technical condition is realized.
Description
Technical Field
The invention belongs to the field of dyeing of Hissel and Lyocell fibers, and particularly relates to a process for improving color fastness of Hissel and Lyocell fiber cheese dyeing.
Background
The bath ratio is the term of textile dyeing and finishing, and refers to the ratio of the fabric in a dip-dyeing mode to the dye liquor. The bath ratio is one of three factors of a dyeing process, the amount of water used and the consumption of dyes and auxiliaries are influenced by the bath ratio, the consumption of water, steam, electricity, dyes, auxiliaries and the like per ton of yarn consumption is correspondingly increased along with the increase of the bath ratio, how to reasonably control the bath ratio and reduce the bath ratio is one of main ways for saving energy and reducing emission.
Color fastness of dyed fibers and fabrics is the term of textile dyeing and finishing, and refers to the color fastness of dyed fabrics, such as color fastness to staining, washing, soaping, dry rubbing, wet rubbing, light fastness, perspiration fastness, and the like. The main process control process is the most difficult to do and the most frequently faced problems of color fastness, washing fastness, soaping fastness, dry rubbing fastness and wet rubbing fastness, and the process is a more complex process made up by mutually combining dyes and processes, quality accidents lower than the authentication standard often occur in the process implementation, and the color fastness of Hissel and Lyocell fiber is a process difficult problem which is the most difficult to control; with the increase of process time and auxiliaries, the consumption of water, steam, electricity, dye, auxiliaries and the like for the dosage of ton yarn is increased, and how to solve and improve the color fastness of reactive dye on Hissel and Lessel cheese is one of the main ways of energy conservation and emission reduction and is a key step (comprising fabric dyeing) for improving the added value of luxury products of high-end fabrics.
Hissel Fiber (THINCELLYOCell) and Lyocell Fiber (Fiber Lyocell) are new fibers produced by using wood pulp and the like as raw materials through a solvent spinning method, are called green fibers in the twenty-first century due to green, environmental protection and innovation, and are aimed at solving the problem that the high-end green fibers cannot be used for cheese production and cannot meet the quality required by level dyeing, and simultaneously, a large amount of anhydrous sodium sulfate (salt, anhydrous sodium sulphate and the like) is adopted for dyeing, so that COD (chemical oxygen demand) in sewage becomes the most difficult to treat and is environment-friendly.
The understanding of the traditional process technology is that high-end fibers are easy to dye, anhydrous sodium sulfate (salt and anhydrous sodium sulphate) can meet the dyeing effect as an accelerating agent, and the anhydrous sodium sulfate (salt and anhydrous sodium sulphate) can rapidly improve the color yield in the dyeing process, so that the fibers are easy to dye in special rapid dye-uptake groups of green fibers; on the other hand, the bath ratio is easy to be considered as high fastness and is easy to control, so that hank and gray fabric (plus material) dyeing with the large bath ratio of the Hischel and Lyocel cheese dyeing bath ratio of more than 1:10 is adopted, the Hischel and Lyocel cheese technology is the low bath ratio dyeing technology of less than 1:3-6, and the effect is obviously more advanced than that of the traditional technology.
The current Hissel and Lyocell cheese dyeing technology still cannot solve the problem of dyeing defects, cannot meet the large-scale production requirements of woven and knitted fabrics, cannot meet the requirements of low energy consumption, high quality and environmental protection, causes the production cost to be up to 100 and 120 tons of water consumption per ton of yarn, and correspondingly, the steam consumption reaches 5.0 to 7.0 tons per ton of yarn, and the power consumption is the maximum burden and pressure of dyeing enterprises. The salt-free dyeing process technology under any bath ratio condition is tested and put into production, and the process technology that the sewage discharge of the dyeing process is less than 20 tons cannot be realized.
Hissel and lyocell cheese generally adopt reactive dyes, have the characteristics of good depth and low cost, and the main factors influencing the color fastness of fabrics dyed by the reactive dyes comprise the structure of the dyes, the characteristics of fibers, dyeing processes, equipment and the like, and are directly related to dyeing and after-finishing processes and the quality of semi-finished products. The invention improves the qualified color fastness of dyed objects such as Hissel and Lyocell cheese (fabric) in dark color under the process technology of dyeing without sodium sulfate reactive dye by improving the Hissel and Lyocell cheese dyeing and the post-treatment process from light color to extra dark color and improving the groping finishing, color fixation and softening process.
The reactive dye dyeing process is characterized in that dye adsorption and industrial salt dyeing promotion (sodium sulfate) are carried out in the dye coloring process, wherein the salt (sodium sulfate) is an important dyeing promotion auxiliary agent, sodium carbonate is also adopted for fixation to improve the depth, a disperse level dyeing auxiliary agent for protecting and improving dye dyeing uniformity is added before dyeing, and the salt is a key substance influencing level dyeing in the dyeing quality, so the level dyeing effect and the dyeing degree are required to be changed by adding the salt for several times or for several times, and the qualified rate of quality is enhanced by the process treatment (the quality problem of dyeing is changed by a heating method and a cooling method) if necessary; after the industrial salt dyeing promotion is finished, adding sodium carbonate, namely soda ash for color fixation, slowly adding the fixation alkali for multiple times (the total time consumption is 1-2.0h), and carrying out heat preservation on the deep and light colors for 20-80min according to corresponding process requirements by using a low-temperature alkali adding mode and a high-temperature alkali adding mode, wherein the process time consumption is 8-12h, the efficiency is seriously influenced, and the technical barrier is formed in the process of high-density forming such as cheese dyeing, warp beam dyeing and the like and the promotion of fabrics.
The Hissel and Lyocell filaments have high water-swelling rate which can generally reach 120-140% of swelling coefficient, and can reach the multiple of fibers in aqueous solution after cheese forming to form high-density cheese,
the invention carries out careful and rigorous analysis and a large number of samples, finds that the process technology and the dye uptake of the fiber have completely different dyeing color-obtaining chemical reaction changes, namely the rapid adsorption force accelerating effect of Hissel (Lyocell) is a contradictory process, the dye and the electric ion (sodium ion) quantity have obvious rapid reaction accumulation period under the high temperature condition, the high-strength high-swelling fiber is easier to cause rapid dyeing to easily form salting-out polymer, particularly, the salting-out speed is faster and the color-obtaining of the surface and the inner layer is higher because the sodium ion (salt and anhydrous sodium sulphate) does not act on the fiber, the dissolving and dispersing effect is slower to form too high color-obtaining of the surface and the inner layer, even the bonding force directly shows that the color-obtaining of the surface and the outer layer is light and uneven, the color-obtaining speed is faster and the color-obtaining is easier to cause under the temperature condition of salt accelerating dyeing, and the problem of the color-obtaining is solved because the salting-out speed is faster and the uniform under the temperature condition of salt, quality problems such as streaks and streaks, depth; furthermore, Hissel itself contains residues from the fibrillation process, which have a certain influence and are directly released in the dye liquor under temperature conditions to form rapidly accumulated white spots with salt and to be dye-impermeable.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a process for improving the color fastness of Hissel and Lyocell fiber cheese dyeing, which solves the color fastness problem of salt-free reactive dye dyeing on Hissel and Lyocell fiber according to the raw material characteristics of the Hissel and Lyocell fiber, and further improves the color fastness on the basis of the rayon salt-free reactive dye dyeing process.
In order to realize the purpose, the invention adopts the technical scheme that:
a process for improving color fastness of Hissel and Lyocell fiber cheese dyeing specifically comprises the following steps:
step 1, pretreatment:
1) dispersing, refining and deoiling: putting the Hissel and Lyocell fiber cheese into a main cylinder of a dyeing machine, injecting water until the whole cheese is immersed, sequentially adding 1-3g/L of high-emulsifying property refining agent, 0.5-2.0g/L of soft water dispersant and 1-3g/L of hydrogen peroxide, controlling the pH value to be 11-12.5, and performing heat preservation at the temperature of 90-105 ℃ for 20-30min to finish primary drainage;
2) injecting water until the whole cheese is immersed, sequentially adding 0.5-2.0g/L anionic dispersant and 1-2.0g/L acetic acid, keeping the temperature at 80-100 ℃ for 8-15min, and controlling the pH value at 4-5.5 to finish secondary drainage;
3) injecting water until the whole cheese is immersed, sequentially adding 0.5-2.0g/L of anion leveling agent and 1.0-2.0g/L of strong dispersing agent, and preserving heat for 10-20min at the temperature of 80-100 ℃ to finish third drainage;
4) injecting water until the whole cheese is immersed, adding 0.3-1.0g/L dispersant, and keeping the temperature at 60-70 ℃ for 5-10min to finish fourth drainage;
and step 3, post-treatment: the dyeing depth is divided into three treatment processes according to the step 2: a light color post-treatment process, a medium and dark color post-treatment process and a dark color post-treatment process;
and step 4, fixation and softening treatment: and 3, after the post-treatment in the step 3 is finished, carrying out color fixation and softening treatment, adding a color fixing agent and a softening agent at the temperature of 50 ℃, heating to 50-55 ℃, and keeping the temperature for 10-15min, wherein the mass dosage of the color fixing agent is 0.2-1.0%, and the dosage of the softening agent is 0.5-3 g/L.
Further, the specific operation of adding sodium carbonate twice in the step 2 is as follows: adding 10-20% of the total amount for the first time, adding at 50-80 deg.C for 5-10min, and keeping the temperature for 5-20 min; adding 80-90% of the total amount for the second time, adding with DOSING system at fixed amount and fixed time for 20-60min, and keeping the temperature at 60-90 deg.C for 20-80min according to color depth.
Further, the pressure difference of the dye liquor inside and outside the cheese is controlled to be 1.0-3.0bar during the dyeing in the step 2; the pump speed of the main pump circulation is 85-95% of the rated speed, and the frequency is 42.5-47.5 HZ.
Further, the light color post-treatment process in the step 3 comprises the following steps: adding 1-2.5g/L acetic acid or acidic auxiliary agent to adjust pH to less than 8, adding water, soaping for 10min, adding 0.8-1.5g/L soaping agent at 70-80 deg.C, washing with hot water for 5-10min at 60-70 deg.C, washing with cold water for 2-3 times at temperature below 40 deg.C, adding 0.01-0.1g/L softening agent, softening, and keeping the temperature at 50-55 deg.C for 10-15 min.
Further, the deep color post-treatment process in the step 3 comprises the following steps: adding 1-2.5g/L acetic acid or acidic auxiliary agent to adjust pH to less than 8, adding water, soaping for 5-10min, adding 1.0-2.0g/L soaping agent at 80-85 deg.C, washing with pulsed flow water for 3min, washing with hot water for 5-10min at 60-70 deg.C for 2-3 times at 40 deg.C, adding softening agent 0.01-0.1g/L, softening, and keeping at 50-55 deg.C for 10-15 min.
Further, the dark color post-treatment process in the step 3 comprises the following steps: adding 1-2.5g/L acetic acid or acidic auxiliary agent to adjust pH to less than 8, adding water for soaping twice, performing pulse flow water washing for 3-6min, hot water washing for 5-10min at 60-70 deg.C, cold water washing for 2-3 times at temperature below 40 deg.C, adding 0.01-0.1g/L softening agent for softening, and keeping at 50-55 deg.C for 10-15 min.
Further, the acid auxiliary agent comprises glacial acetic acid, citric acid and industrial acid of substitute acid.
Further, the specific operations of soaping twice are as follows: adding 1.5-3g/L soaping agent into the first soaping, and keeping the temperature at 80-90 ℃ for 10-15 min; adding 0.8-2g/L soaping agent into the second soaping, and keeping the temperature at 70-85 ℃ for 10 min.
Further, according to the depth of the dye dosage, the dye dosage is divided into: the color of the OWF is less than or equal to 0.5 percent, the color of the OWF is less than or equal to 2.0 percent, the color of the OWF is less than or equal to 5 percent, and the color of the OWF is ultra-dark, and the color of the OWF is more than or equal to 7 percent.
The invention has the beneficial effects that: (1) in the pretreatment process, the residues of Hissel and Lyocell fibers in the processing procedure are enhanced to be quickly dissolved under the condition of high strength through the refining, emulsifying and dispersing process steps; meanwhile, the residual sodium sulfide solution of the fiber structure in the raw material process is fully diluted and reduced by continuously performing acid dispersion, penetration and oil removal before dyeing; after the high-temperature treatment of the anionic dispersant and the strong dispersant is finished, the non-uniform degree is reduced, and the deep combination of the color-obtaining dye and the fiber is improved to make a basic improvement; lays a foundation for convenient salt-free (sodium sulfate) dyeing and rapid deepening dyeing;
(2) the dye is quickly and uniformly adsorbed and colored in the dyeing and dyeing process after refining emulsification, acid dispersion and anion high-temperature treatment, the process mode of salt-accelerating dyeing is replaced, the problems of uneven salting-out and colored flower quality which are quickly and easily formed are solved, the fiber is not influenced by (inside-outside) exchange frequency of circulation flow in the disperse dyeing process, the dyeing uniformity is completed by quickly combining the solubility of the dye and dispersion and penetration, salt-free precipitation is realized, and the quality problem of quickly salting-out colored spots caused by temperature increase is solved; the excessive pH value from weak alkali pH (4.5-6) to 10.68-11.0 meeting the dyeing depth is realized by adding the soda ash, the local uneven phenomenon caused by the fact that the salting-out effect is converted into alkali precipitation at high temperature is reduced, and the situation that the Hissel and Lyocell cheese process technology cannot be produced in large quantities is solved;
(3) according to the invention, sodium carbonate is added for soda ash solid coloring on the basis that Hissel and Lyocell cheese have rapid dyeing and improved dispersion adsorption, the coloring rate is slowly improved in a dye solution directly from the pH value in the process, the pH value for deepening the dye is gradually improved under the condition of high combination efficiency of the dye and fiber, the color depth is satisfied while the level dyeing is realized under the change of the pH value according to the alkaline agent with the corresponding dosage of the color depth, the color fastness is improved while the dye exhaustion rate is improved, and thus the quality effect of salt-free dyeing is achieved and realized;
(4) the invention improves the color fastness and the color depth by using the same alkali amount or the alkali amount which is improved by 20 to 40 percent, ensures the reduction of flooding by using the weak alkali principle and effectively implements the process for improving the color fastness; the technical problem that Hissel and Lyocell cheese are easy to color and flower and cannot be produced in batch is effectively solved, the process requirement of the ultralow bath ratio of 1:3 can be realized, the bath ratio requirement of about 6 can also be met, the production requirement of the large bath ratio can also be realized as long as a circulating pump of dyeing equipment is qualified, the limitation of the bath ratio requirement is avoided, the unidirectional function of the equipment can also be utilized, the bidirectional function dyeing can also be utilized, and the method is a major breakthrough of the dyeing and finishing energy-saving and environment-friendly technology; the COD total amount in the wastewater is reduced by more than 60-100%, simultaneously the difficulty of decoloring salt in sewage treatment is reduced, and the popularization and application of a simple alkali recovery energy-saving process can be directly realized; the situation of low process efficiency of Hissel and Lyocell cheese is solved, the application of a real short-process dyeing and finishing process technology is realized, the process from 10-12h is shortened to 4.5-7h, the effective process time is shortened by about 100 plus 200 percent, the problem of high investment of sewage treatment is solved, and the environment-friendly concept of energy-saving, ecological, green and natural is fully met;
(5) the Hissel and Lyocell fibers are prepared from wood pulp, an N-methylmorpholine oxide (NMMO) aqueous solution is used as a solvent, the cellulose pulp can be directly dissolved to obtain a spinning solution, and then wet spinning or dry-wet spinning is adopted to prepare NMMO-H with a certain concentration2Compared with the conventional viscose fiber production method, the spinning method has the greatest advantages that NMMO can directly dissolve cellulose pulp, the production flow of spinning stock solution can be greatly simplified, the recovery rate of NMMO can reach more than 99 percent, and the production process hardly pollutes the environment; the rayon is made from cotton pulp and reed fiber as main raw materials, and in the process of processing raw material pulp, plant cellulose is alkalized to form alkali cellulose, and then the alkali cellulose and disulfide are mixedThe carbonization generates cellulose xanthate, the viscose solution obtained by dissolving the cellulose xanthate in dilute alkali solution is called viscose, the viscose is made into viscose fiber after wet spinning and a series of treatment processes, and the color fastness in the later period can be ensured without color fixation; due to the processing technology change of the Hissel and Lyocell fibers, the process is shortened, so that the residual solvent of the fibers is difficult to completely treat after the yarn is twisted; the treatment process of the viscous solution and the sulfide obtained in the dilute alkali solution of the rayon can be effectively solved by adopting an efficient oil removal and acid washing process method developed by the inventor, but Hissel and Lyocell fibers are completely satisfied with the condition of dye-uptake only by the aid of emulsification removal due to high-temperature residues of solvent substances in the treatment process, otherwise white knot dye cannot be easily caused by inner-layer residues; therefore, the method needs to perform color fixation and over-softening treatment after post-treatment, so as to prevent the problem of uneven dyeing caused by too fast dyeing of Hissel and Lyocell cheese due to high density and high lignin content of raw materials, and the adopted color fixing agent has extremely low content, but the color fastness performance of the Hissel and Lyocell cheese dyeing can be greatly improved, so that the color fastness performance of the Hissel and Lyocell cheese dyeing can not be poor due to not adding too much color fixing agent but fading, and the color fixing agent is not added;
(6) the invention improves and changes the dyeing color quality of Hissel and Lyocell cheese on the basis of not changing the dye without being limited by bath ratio; meeting the market demand for knitted fabrics and all luxury goods upgrading; the process technology is simple and uncomplicated and is the basis for the derivation of future process technology; the salt consumption and pollution are reduced, and the worldwide problem of sewage treatment is reduced; the labor intensity of workers is reduced, the requirement of clean production of green fibers is completely met, the green technology upgrading and idea of national industrial technology are solved, the environment-friendly supply idea of luxury goods is also met, and the environment-friendly new breakthrough of the green fibers under the clean production technical condition is realized; the dyeing quality influence links of the process are reduced, so that the working efficiency is shortened; the automatic dyeing and finishing machine provides rapid operating conditions for directly realizing the unmanned intellectualization of dyeing and finishing processes, and is the best advantage of low investment of intellectualization without excessive human influence factors. The method breaks through and fills the blank of the salt-free dyeing technology of the Hissel and Lyocell cheese, and improves the multipurpose popularization caused by the stagnation of the Hissel and Lyocell cheese technology; the method changes and influences the quality patterns of reactive fiber dyes such as Hissel and Lyocell cheese and the like in different dyeing modes, has profound significance, realizes the breakthrough of the short-flow dyeing process technology of the reactive dyes, especially develops the precedent of the short-flow dyeing process of Hissel and Lyocell cheese, and promotes the start of the high-end fiber dyeing process technology.
Drawings
FIG. 1 shows the course of the water and soaping fastness of the cheese prepared in example 1;
FIG. 2 is a report of the color fastness of cheese obtained by the dyeing process of example 1;
FIG. 3 is a time comparison diagram of the new process of the sodium sulfate-free dyeing of the invention and the traditional process.
Detailed Description
For a better understanding of the present invention, embodiments of the present invention are described in detail below with reference to examples, but those skilled in the art will understand that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention.
The refining agent with high emulsifying property in the technical case of the implementation process is a conventional product with a micromolecule structure of an anionic structure and a nonionic structure, which is mainly subjected to osmotic emulsification, and is matched with the process steps of a dispersing agent and a strong dispersing agent for high-temperature treatment.
The dispersant in this embodiment adopts nekal BX, and its working principle is: the nekal BX, namely the sodium diisobutyrate naphthalene sulfonate, is an anionic surfactant and has the characteristics of the surfactant: wetting and infiltration, wherein when a solid is contacted with a liquid, the original solid/gas and liquid/gas interfaces disappear to form a new solid/liquid interface, and the process is called wetting. For example, textile fibers are porous materials having a large surface area that, when the solution is spread along the fibers, it enters the interstices between the fibers and drives air out, changing the original air/fiber interface to a liquid/fiber interface, which is a typical wetting process; while the solution will simultaneously enter the interior of the fiber, a process known as osmosis. Therefore, the dye liquor is added with the nekal, which can accelerate the full dissolution of the dye and the more entering of the dye into the fiber, improve the dyeing depth and level dyeing property, reduce the surface color and improve the color fastness.
The action mechanism of the strong dispersant (also called diffusant) NNO is: the surface of the solid particles is adsorbed, so that the interfacial tension between liquid and liquid or between solid and liquid is reduced, and the surface of the coagulated solid particles is easy to wet; the polymeric diffusant forms an adsorption layer on the surface of solid particles, so that the charges on the surface of the solid particles are increased, the reaction force between the particles forming the three-dimensional obstruction is improved, a bilayer structure is formed on the surface of the solid particles, the polar end of the outer-layer dispersant has strong affinity with water, the degree of wetting the solid particles by the water is increased, the solid particles are far away due to electrostatic repulsion, the system is uniform, the suspension performance is improved, no precipitation is caused, and the physicochemical properties of the whole system are the same. Therefore, the solubility and stability of the dye are increased after the NNO is added, and the dye is more beneficial to level dyeing and deep dyeing.
The acid aids in the examples described below include glacial acetic acid, citric acid, and alternative acid industrial acids.
The dyes in the examples which follow are conventional reactive dyes in general use for the production, and it is also advantageous not to make special choices.
The action principle of salt-free dyeing is as follows: one of the methods for improving the color fastness is that sodium sulfate (anhydrous sodium sulphate) is not added in the dyeing process of salt-free dyeing, the precipitation reaction of ions and soda under the high-temperature condition is reduced, the floating color adsorbed on the surface layer of the fiber in the high-temperature salting-out process is reduced, the affinity dyeing and color fixing degree of the fiber and alkali in a dye solution is accelerated, the pH value reaction process (from 4.5/6 to 10.86 or 11) of dyeing is improved, and the period that the salt promotes the dyeing to be converted into the exchange level dyeing of color fixing so as to improve the color fastness is reduced.
This example uses a package having a density of 0.35-0.6g/cm3 and a weight of 800-1000g of single yarn.
The package yarn fiber dyeing specifications used in the examples are given in table 1:
TABLE 1
Example 1:
a process for improving color fastness of Hissel and Lyocell fiber cheese dyeing specifically comprises the following steps:
step 1, pretreatment:
1) dispersing, refining and deoiling: putting the Hissel fiber cheese into a main cylinder of a dyeing machine, injecting water until the whole cheese is immersed, sequentially adding 1g/L high-emulsifying-performance refining agent, 0.5g/L soft water dispersing agent and 1g/L hydrogen peroxide, controlling the pH value to be 11, and finishing primary drainage after heat preservation at the temperature of 90 ℃ for 20 min;
2) injecting water until the whole cheese is immersed, sequentially adding 1.2g/L of anionic dispersant and 1.2g/L of acetic acid, preserving the temperature at 80 ℃ for 15min, and controlling the pH value to be 4 to finish secondary drainage;
3) injecting water until the whole cheese is immersed, sequentially adding 0.5g/L of anion leveling agent and 1.0g/L of strong dispersing agent, and preserving heat at the temperature of 80 ℃ for 20min to finish third drainage;
4) injecting water until the whole cheese is immersed, adding 0.8g/L dispersant, and preserving heat for 5min at the temperature of 60 ℃ to finish fourth drainage;
and step 3, post-treatment: the light color post-treatment process comprises the following steps: adding 1g/L acetic acid or acidic assistant to adjust the pH value to 6, adding water for soaping for 10min, adding 0.8g/L soaping agent, washing with hot water for 10min at 70 ℃, washing with cold water for 2 times at the temperature of below 40 ℃, finally adding 0.01g/L softening agent for over-softening the sample, and keeping the temperature at 55 ℃ for 10 min;
and step 4, fixation and softening treatment: and 3, after the post-treatment in the step 3 is finished, carrying out color fixing and softening treatment, adding a color fixing agent and a softening agent at the temperature of 50 ℃, heating to 50 ℃, and keeping the temperature for 10min, wherein the mass dosage of the color fixing agent is 0.2 percent, and the dosage of the softening agent is 0.5 g/L.
Example 2:
a process for improving color fastness of Hissel and Lyocell fiber cheese dyeing specifically comprises the following steps:
step 1, pretreatment:
1) dispersing, refining and deoiling: putting the lyocell fiber cheese into a main cylinder of a dyeing machine, injecting water until the whole cheese is immersed, sequentially adding 2g/L high-emulsifying-performance refining agent, 1.5g/L soft water dispersing agent and 1.5g/L hydrogen peroxide, controlling the pH value to be 12, and finishing primary drainage after heat preservation for 30min at the temperature of 105 ℃;
2) injecting water until the whole cheese is immersed, sequentially adding 2.0g/L of anionic dispersant and 2.0g/L of acetic acid, keeping the temperature at 100 ℃ for 8min, and controlling the pH value to be 5 to finish secondary drainage;
3) injecting water until the whole cheese is immersed, sequentially adding 1.5g/L of anion leveling agent and 1.5g/L of strong dispersing agent, and preserving heat at the temperature of 100 ℃ for 10min to finish third drainage;
4) injecting water until the whole cheese is immersed, adding 1.0g/L of dispersing agent, and preserving heat for 10min at the temperature of 70 ℃ to finish fourth drainage;
and step 3, post-treatment: the medium and deep color post-treatment process comprises the following steps: adding 2.5g/L acetic acid or acidic auxiliary agent to adjust pH to 5, adding water for soaping for 5min, adding 2.0g/L soaping agent, washing at 85 deg.C for 3min with pulsating flow, washing with hot water for 5min at 60 deg.C, washing with cold water for 3 times at below 40 deg.C, adding 0.01g/L softening agent for softening, and keeping the temperature at 50 deg.C for 15 min;
and step 4, fixation and softening treatment: and 3, after the post-treatment in the step 3 is finished, carrying out color fixing and softening treatment, adding a color fixing agent and a softening agent at the temperature of 50 ℃, heating to 55 ℃, and keeping the temperature for 15min, wherein the mass consumption of the color fixing agent is 0.4 percent, and the consumption of the softening agent is 1.5 g/L.
Example 3:
a process for improving color fastness of Hissel and Lyocell fiber cheese dyeing specifically comprises the following steps:
step 1, pretreatment:
1) dispersing, refining and deoiling: putting the Hissel fiber cheese into a main cylinder of a dyeing machine, injecting water until the whole cheese is immersed, sequentially adding 3g/L of high-emulsifying-performance refining agent, 2.0g/L of soft water dispersing agent and 3g/L of hydrogen peroxide, controlling the pH value to be 12.5, and finishing primary drainage after heat preservation at the temperature of 100 ℃ for 25 min;
2) injecting water until the whole cheese is immersed, sequentially adding 0.5g/L anionic dispersant and 1g/L acetic acid, keeping the temperature at 90 ℃ for 12min, and controlling the pH value to be 5.5 to finish secondary drainage;
3) injecting water until the whole cheese is immersed, sequentially adding 2.0g/L of anion leveling agent and 2.0g/L of strong dispersing agent, and preserving heat at 90 ℃ for 15min to finish third drainage;
4) injecting water until the whole cheese is immersed, adding 0.3g/L dispersant, and preserving heat for 7min at the temperature of 65 ℃ to finish fourth drainage;
and step 3, post-treatment: the deep color post-treatment process comprises the following steps: adding 2.0g/L acetic acid or an acidic assistant to adjust the pH value to 6.5, then adding water to carry out soaping twice, then carrying out pulse flow water washing for 3min, hot water washing for 10min at the temperature of 60 ℃, cold water washing for 2 times at the temperature of below 40 ℃, finally adding 0.01g/L softening agent to carry out sample softening, and carrying out heat preservation for 15min at the temperature of 55 ℃, wherein the specific operation of the soaping twice is as follows: adding 1.5g/L soaping agent into the first soaping, and keeping the temperature at 80 ℃ for 15 min; adding 0.8g/L soaping agent into the second soaping, and keeping the temperature at 85 ℃ for 10 min;
and step 4, fixation and softening treatment: and 3, after the post-treatment in the step 3 is finished, carrying out color fixation and softening treatment, adding a color fixing agent and a softening agent at the temperature of 50 ℃, heating to 53 ℃, and keeping the temperature for 12min, wherein the mass consumption of the color fixing agent is 1.0 percent, and the consumption of the softening agent is 3 g/L.
The Hissel dyed cheese obtained in example 1 above was compared with the rayon dyed cheese already filed for the purpose of comparing the process and effect.
TABLE 2
The traditional dyeing process is compared with the consumption of auxiliaries of Hissel and Lyocell dyeing processes:
TABLE 3
TABLE 4
TABLE 5
As can be seen from the above tables 2-5, the dyeing process of Hissel and Lyocell fiber cheese of the present invention has the advantages of further enhanced color fastness after the addition of the color fixing agent, wider bath ratio range of dyeing, more environmental protection, energy saving, lower cost of investment compared with the conventional process, reduced salt consumption and pollution, reduced worldwide problem of sewage treatment, reduced labor intensity, completely meeting the requirement of green clean production, and meeting the concept of environment-friendly supply of luxury goods.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above-described embodiments. Those skilled in the art should appreciate that many modifications and variations are possible in light of the above teaching without departing from the scope of the invention.
Claims (8)
1. A process for improving color fastness of Hissel and Lyocell fiber cheese is characterized by comprising the following steps:
step 1, pretreatment:
1) dispersing, refining and deoiling: placing a Hissel or Lyocell fiber cone into a main cylinder of a dyeing machine, injecting water until the whole cone is immersed, sequentially adding 1-3g/L of high-emulsifying property refining agent, 0.5-2.0g/L of soft water dispersant and 1-3g/L of hydrogen peroxide, controlling the pH value to be 11-12.5, and preserving heat at the temperature of 90-105 ℃ for 20-30min to finish primary drainage;
2) injecting water until the whole cheese is immersed, sequentially adding 0.5-2.0g/L anionic dispersant and 1-2.0g/L acetic acid, keeping the temperature at 80-100 ℃ for 8-15min, and controlling the pH value at 4-5.5 to finish secondary drainage;
3) injecting water until the whole cheese is immersed, sequentially adding 0.5-2.0g/L of anion leveling agent and 1.0-2.0g/L of strong dispersing agent, and preserving heat for 10-20min at the temperature of 80-100 ℃ to finish third drainage;
4) injecting water until the whole cheese is immersed, adding 0.3-1.0g/L dispersant, and keeping the temperature at 60-70 ℃ for 5-10min to finish fourth drainage;
step 2, dyeing: adding water for dyeing after the treatment of the step 1, controlling the bath ratio to be 3-8, and carrying out specific dyeing operation: adding 0.5-2.0g/L of anionic dispersant, 1.0-3.0g/L of dispersing agent and dye, wherein the dosage of the dye OWF is less than or equal to 7%, and then adding 5-30g/L of sodium carbonate twice for dyeing;
and step 3, post-treatment: the dyeing depth is divided into three treatment processes according to the step 2: a light color post-treatment process, a medium and dark color post-treatment process and a dark color post-treatment process;
and step 4, fixation and softening treatment: and 3, after the post-treatment in the step 3 is finished, carrying out color fixation and softening treatment, adding a color fixing agent and a softening agent at the temperature of 50 ℃, heating to 50-55 ℃, and keeping the temperature for 10-15min, wherein the mass dosage of the color fixing agent is 0.2-1.0%, and the dosage of the softening agent is 0.5-3 g/L.
2. The process for improving color fastness of Hissel and Lyocell fiber cheese as claimed in claim 1, wherein the specific operation of adding sodium carbonate twice in step 2 is as follows: adding 10-20% of the total amount for the first time, adding at 50-80 deg.C for 5-10min, and keeping the temperature for 5-20 min; adding 80-90% of the total amount for the second time, adding with DOSING system at fixed amount and fixed time for 20-60min, and keeping the temperature at 60-90 deg.C for 20-80min according to color depth.
3. The process for improving the color fastness of the Hissel and Lyocell fiber cheese as claimed in claim 1, wherein the pressure difference of the dye solution inside and outside the cheese during the step 2 dyeing is controlled to be 1.0-3.0 bar; the pump speed of the main pump circulation is 85-95% of the rated speed, and the frequency is 42.5-47.5 HZ.
4. The process for improving color fastness of Hissel and Lyocell fiber cheese as claimed in claim 1, wherein the light color post-treatment process in step 3 is as follows: adding 1-2.5g/L acetic acid or acidic auxiliary agent to adjust pH to less than 8, adding water, soaping for 10min, adding 0.8-1.5g/L soaping agent at 70-80 deg.C, washing with hot water for 5-10min at 60-70 deg.C, washing with cold water for 2-3 times at temperature below 40 deg.C, adding 0.01-0.1g/L softening agent, softening, and keeping the temperature at 50-55 deg.C for 10-15 min.
5. The process for improving color fastness of Hissel and Lyocell fiber cheese according to claim 1, wherein the deep color post-treatment process in step 3 is as follows: adding 1-2.5g/L acetic acid or acidic auxiliary agent to adjust pH to less than 8, adding water, soaping for 5-10min, adding 1.0-2.0g/L soaping agent at 80-85 deg.C, washing with pulsed flow water for 3min, washing with hot water for 5-10min at 60-70 deg.C for 2-3 times at 40 deg.C, adding softening agent 0.01-0.1g/L, softening, and keeping at 50-55 deg.C for 10-15 min.
6. The process for improving color fastness of Hissel and Lyocell fiber cheese according to claim 1, wherein the dark color post-treatment process in step 3 is as follows: adding 1-2.5g/L acetic acid or acidic auxiliary agent to adjust pH to less than 8, adding water for soaping twice, performing pulse flow water washing for 3-6min, hot water washing for 5-10min at 60-70 deg.C, cold water washing for 2-3 times at temperature below 40 deg.C, adding 0.01-0.1g/L softening agent for softening, and keeping at 50-55 deg.C for 10-15 min.
7. The process for improving color fastness of Hissel and Lyocell fiber cheese according to any of claims 5-6, wherein the acidic adjuvant comprises glacial acetic acid, citric acid, and substitute acid industrial acids.
8. The process for improving color fastness of Hissel and Lyocell fiber cheese as claimed in claim 6, wherein the specific operation of soaping twice is as follows: adding 1.5-3g/L soaping agent into the first soaping, and keeping the temperature at 80-90 ℃ for 10-15 min; adding 0.8-2g/L soaping agent into the second soaping, and keeping the temperature at 70-85 ℃ for 10 min.
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| CN110699974A (en) * | 2019-09-24 | 2020-01-17 | 杭州卓达染整有限公司 | Acetate fiber and lyocell fiber interwoven fabric and dyeing process thereof |
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| CN110699974A (en) * | 2019-09-24 | 2020-01-17 | 杭州卓达染整有限公司 | Acetate fiber and lyocell fiber interwoven fabric and dyeing process thereof |
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