CN114381951A - Preparation method of natural antibacterial yarn, natural antibacterial yarn and fabric - Google Patents
Preparation method of natural antibacterial yarn, natural antibacterial yarn and fabric Download PDFInfo
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- CN114381951A CN114381951A CN202011141334.2A CN202011141334A CN114381951A CN 114381951 A CN114381951 A CN 114381951A CN 202011141334 A CN202011141334 A CN 202011141334A CN 114381951 A CN114381951 A CN 114381951A
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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
- D06P1/22—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 vat dyestuffs including indigo
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/44—Yarns or threads characterised by the purpose for which they are designed
- D02G3/449—Yarns or threads with antibacterial properties
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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
- D06P1/34—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 natural dyestuffs
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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
- D06P1/673—Inorganic compounds
- D06P1/67333—Salts or hydroxides
- D06P1/6735—Salts or hydroxides of alkaline or alkaline-earth metals with anions different from those provided for in D06P1/67341
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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 application discloses a preparation method of natural antibacterial yarn, the natural antibacterial yarn and fabric, which comprise the following steps: carrying out pre-reduction treatment on a natural plant vat series antibacterial dye to obtain a natural plant dye leuco body high-concentration mother solution; diluting the high-concentration mother liquor of the leuco dye with normal-temperature water, and adding an alkaline agent and a reducing agent in the dilution process to obtain a dyeing working solution; dyeing the yarn by using the dyeing working solution, and carrying out oxidation, soaping, washing and drying treatment on the dyed yarn to obtain the natural antibacterial yarn. The method disclosed by the application is simple and efficient, the prepared yarn has natural antibacterial performance, the requirements of consumers on the antibacterial and bacteriostatic properties of textiles can be met, and the natural plant vat series dye belongs to an environment-friendly renewable raw material, so that the environmental pollution is small, and the environment-friendly requirements are met.
Description
Technical Field
The application relates to the field of textiles, in particular to a preparation method of natural antibacterial yarns, the natural antibacterial yarns and fabric.
Background
Most of dyes used for coloring textiles at present are synthetic dyes, most of raw materials of the synthetic dyes are heterocyclic compounds and aromatic compounds, the pollution generated during production and use is serious, the waste water and gas amount is large, and although a large amount of manpower and financial resources are invested for treating the dye waste water at present, the pollution problem of the synthetic dyes cannot be fundamentally solved. In addition, many synthetic dye intermediates have toxicity of different degrees, which is very harmful to human health, and the use of the synthetic dye intermediates in infant textiles and textiles in direct contact with skin is limited or even prohibited due to the toxicity problem of the synthetic dye intermediates. Similarly, the chemical antibacterial agent has antibacterial effect when being applied to fibers, fabrics and textiles through an after-finishing technology, but the antibacterial effect is obviously weakened along with the increase of the washing times until the antibacterial function is lost.
With the enhancement of environmental awareness of people and the pursuit of healthy life style, more and more people begin to pay attention to the health of textiles, for example, whether textile clothes have natural antibacterial or bacteriostatic action, whether the textile clothes are suitable for being worn by directly contacting with skin, and the like. Natural dyes refer to dyes obtained from plant, animal or mineral sources with little or no chemical processing. Some natural dyes have the health care function of medicines, have antibacterial property and are suitable for developing green products with high added values. The fabric dyed by the natural dye is particularly suitable for being used as a textile contacting with skin, and has very considerable market prospect. The suspension dyeing method has high requirements on dyeing particles, the dyeing particles are required to be dried after padding with a dyeing solution, the dyeing process can be completed only by padding with a reduction fixing solution and then steaming at high temperature and washing and oxidizing, but the suspension padding is suitable for directly dyeing the fabric and is difficult to dye the yarn, so that patterning can not be realized in a yarn weaving mode, the variety change obtained by fabric dyeing is less, and the cost is high. And the suspension dyeing method is only suitable for dyeing medium and light colors, and has poor dyeing fastness when dyeing deep colors. Therefore, how to develop a simpler, more efficient and lower-cost method for preparing the natural antibacterial yarn to meet the daily wearing requirements of people becomes crucial.
Disclosure of Invention
The technical problem that this application mainly solved provides a preparation method, natural antibiotic yarn and surface fabric of natural antibiotic yarn, its characterized in that, includes following step:
carrying out pre-reduction treatment on a natural plant reduction type antibacterial dye to obtain a natural plant reduction type antibacterial leuco body high-concentration mother solution;
diluting the high-concentration mother liquor of the natural plant reduction system antibacterial leuco body with normal-temperature water, and adding an alkaline agent and a reducing agent in the dilution process to maintain the reduction condition to obtain a dyeing working solution;
dyeing the yarn by using the dyeing working solution, and soaping, washing and drying the dyed yarn to obtain the natural antibacterial yarn.
Further, natural plant vat-series dyes include, but are not limited to: a dye containing gardenia yellow; indigo dye prepared from one or more of radix Isatidis, folium Isatidis, Isatis tinctoria, and Indigofera tinctoria; and bio-based vat dyes synthesized from natural plant dyes and pigments.
Furthermore, the dilution multiple of the normal temperature water and the high-concentration leuco dye mother liquor is 10-60 times.
Further, the running length of the yarn after passing through the dyeing working solution is more than 28 meters.
Further, the pre-reduction treatment of the natural plant reduction antibacterial dye comprises the following steps:
adding 50-60% of water into a container, adding 60-120 g/L of an alkaline agent, and stirring for 2-5 min to obtain an alkaline solution;
heating the alkaline solution, adding 120-200 g/L of natural plant reduction antibacterial dye, stirring for 10min, heating to 85-100 ℃, and keeping for 3-5 min to obtain initial high-concentration mother liquor;
and (3) cooling the initial high-concentration mother liquor to 40-45 ℃, adding 60-120 g/L of reducing agent, stirring for 5-10 min, supplementing the rest water, and finally stirring for 30-45 min to obtain the natural plant reduced antibacterial dye leuco body high-concentration mother liquor.
Furthermore, the reducing agent is one or more environment-friendly composite reducing agents.
Furthermore, the environment-friendly composite reducing agent is RSW or RSD.
Further, the alkaline agent is one or a mixture of more of caustic soda, soda ash or alkaline substances of strong base and weak acid salt.
The application also provides a natural antibacterial yarn which is prepared by any one of the preparation methods of the natural antibacterial yarn.
The application also provides a natural antibacterial fabric which is prepared from any one of the natural antibacterial yarns.
Further, the natural antibacterial fabric is a knitted or woven fabric.
Furthermore, the natural antibacterial fabric is prepared from pure natural antibacterial yarns or is formed by blending the natural antibacterial yarns with other yarns.
Further, the natural antibacterial fabric is used for preparing clothes, home textiles or towels.
The beneficial effect of this application is: in contrast to the prior art, the present application provides a method for preparing a natural antibacterial yarn, comprising the following steps: carrying out pre-reduction treatment on the natural plant reduced antibacterial dye to obtain high-concentration mother liquor of the natural plant reduced antibacterial dye leuco body; diluting the leuco body high-concentration mother liquor with normal-temperature water, and adding an alkaline agent and a reducing agent in the dilution process to maintain the reduction condition to obtain a dyeing working solution; dyeing the yarn by using a dyeing working solution, and carrying out oxidation, soaping, washing and drying treatment on the dyed yarn to obtain the natural antibacterial yarn. The natural plant vat-series dyes used in the present application include, but are not limited to: a dye containing gardenia yellow; indigo antibacterial dye prepared from one or more of radix Isatidis, folium Isatidis, Isatis tinctoria, and Indigofera tinctoria; the yarns are dyed by a leuco dyeing method through bio-based vat dyes synthesized by natural plant dyes and pigments, and the prepared yarns have natural antibacterial performance, can meet the requirements of consumers on antibacterial and bacteriostatic of textiles, and are simple in method; according to the method, by means of the environment-friendly composite reducing agent, the natural plant dye is prepared into the leuco mother liquor with high concentration in advance by adopting a step-by-step reduction method, when the dyeing working solution is prepared by using the natural plant dye leuco high-concentration mother liquor, an alkaline agent and the composite reducing agent are added to maintain the reduction condition, so that the dyeing working solution is more stable, the dye consumption of the suspension dyeing method under the condition of similar dyeing depth is 300-400% of that of the leuco dyeing method, the cost of the method is obviously reduced, and the natural plant vat series antibacterial dye adopts environment-friendly renewable raw materials, so that the environmental pollution is small, and the requirement for environmental protection is met.
Drawings
FIG. 1: the application discloses a flow schematic diagram of an embodiment of a preparation method of a natural antibacterial yarn.
Detailed Description
In order to make the purpose, technical solution and effect of the present application clearer and clearer, the present application is further described in detail below with reference to the accompanying drawings and examples.
Referring to fig. 1, fig. 1 is a schematic flow chart of an embodiment of a method for preparing a natural antimicrobial yarn according to the present application, the method including:
step S101: carrying out pre-reduction treatment on the natural plant vat series antibacterial dye to obtain the natural plant dye leuco body high-concentration mother liquor.
Wherein the natural plant reduction system antibacterial dye can be extracted from radix Isatidis, folium Isatidis, Isatis tinctoria, and Indigofera tinctoria, and has natural antibacterial and bacteriostatic effects; the dye containing natural plant gardenia yellow also has the efficacy of antibacterial treatment of skin infection; the raw material of the bio-based vat dye synthesized by natural plant dye pigment has antibacterial performance to bring antibacterial effect after dyeing; the yarn is dyed by adopting natural plant antibacterial dye, and the obtained yarn has natural antibacterial performance, so that the fabric with natural antibacterial performance and the textile with natural antibacterial performance are obtained. Because the reducing dye is insoluble in water, the fiber can be dyed only by reducing and dissolving the reducing dye in alkaline strong reducing liquid into leuco sodium salt, and the leuco sodium salt is recovered into insoluble dye lake after oxidation and is fixed on the fiber, so the fastness to washing and sun is high generally.
Step S102: diluting the natural plant dye leuco body high-concentration mother liquor with normal-temperature water, and adding an alkaline agent and a composite reducing agent in the dilution process to maintain the reduction condition to obtain a dyeing working solution.
During normal use, the high-concentration mother liquor of the leuco dye needs to be further diluted according to the current use condition, normal-temperature water is adopted to dilute the high-concentration mother liquor of the leuco dye of the natural plant, and specifically, the dilution times of the normal-temperature water and the high-concentration mother liquor of the leuco dye can be 10-60 times (such as 20, 30, 40 and 50 times). And adding an alkaline agent and a composite reducing agent in the dilution process to maintain the reduction condition to obtain the dyeing working solution.
Step S103: dyeing the yarn by using the dyeing working solution, and carrying out oxidation, soaping, washing and drying treatment on the dyed yarn to obtain the natural antibacterial yarn.
According to the method, by means of an environment-friendly composite reducing agent, a natural plant reduction dye is prepared into high-concentration leuco mother liquor in advance by adopting a pre-reduction method, then the standby leuco mother liquor is diluted and the reduction condition is maintained to prepare a dyeing working solution, and finally the dyeing working solution is used for dyeing yarns, so that the prepared yarns have natural antibacterial performance, the requirements of consumers on the antibacterial property and bacteriostasis of textiles can be met, and the method is simple and efficient; and the natural plant reduction antibacterial dye adopts environment-friendly renewable raw materials, has small environmental pollution and meets the requirement of environmental protection.
In one embodiment, the length of yarn passing through the dyeing solution is not less than 28 meters. Firstly, converting a water-insoluble dye into a state of leuco sodium salt by utilizing a pre-reduction method, wherein dye particles are converted into 100-500 nano-scale microcolloids, so that the dye can be adsorbed and diffused into fibers; then the fiber is oxidized and washed to be recovered to a water-insoluble state and fixed on the fiber to finish the dyeing process. The yarn passes through a dye vat and is soaked in a dyeing working solution, the suspension dyeing method is a small dye vat, and the cloth passing route is about 2-3 meters; the method adopts a leuco dyeing method, at least two large tanks are adopted for continuous dyeing, the length of a cloth passing route formed by the yarn soaked in each dye tank and passing through a plurality of cloth guide rollers is 14-15 meters, and the length of the cloth passing route formed by the two dye tanks is 28 meters or more. Because the particle size of dye molecules in a leuco state is nano-scale, the dye can enter the fiber more easily, the longer the contact time of the fiber of the yarn and the dyeing working solution is, the higher the combination degree of the antibacterial dye and the fiber is, and the longer the antibacterial effect is.
In one embodiment, the yarn is dyed by using a dyeing working solution prepared from a natural plant reduction system antibacterial leuco body high-concentration mother solution, yarn boiling is carried out by using a penetrating agent and caustic soda, then an alkaline agent and a composite reducing agent are added at room temperature and mixed uniformly, then the dyeing working solution is added, the temperature is raised to 30-50 ℃, the temperature raising rate is 0.5-1.5 ℃/min, and the heat preservation operation is carried out for 5-30 min; after the heat preservation is finished, cooling and discharging liquid, and then washing the yarns for 10 minutes by using cold water; and oxidizing the washed yarn by using 1-6 g/L normal-temperature hydrogen peroxide, and recovering the leuco sodium salt into insoluble dye lake after oxidation so as to fix the leuco sodium salt on the fiber. Oxidizing the washed yarn nylon fibers by using 1-6 g/L (such as 2g/L, 3g/L, 4g/L and 5g/L) of normal-temperature hydrogen peroxide, and operating for 15-30 min (such as 17min, 20min, 25min and 28 min); after oxidation, soaping treatment is carried out, specifically, 1-4 g/L (such as 1.5g/L, 2g/L, 2.5g/L and 3g/L) of soaping agent and 1-4 g/L (such as 1.5g/L, 2g/L, 2.5g/L and 3g/L) of dispersing agent can be added, the temperature is raised to 80-85 ℃ (such as 81 ℃, 82 ℃, 83 ℃ and 84 ℃) and the treatment is carried out for 5-25 min (such as 10min, 15min, 20min and 23 min). And finally, carrying out hot water washing, water washing and drying treatment on the yarn subjected to soap washing.
In one embodiment, the pre-reduction treatment of the natural plant vat-series antibacterial dye comprises the following steps: adding 50-60% (e.g., 52%, 55%, 58%) of water into a container, adding 60-120 g/L (e.g., 65g/L, 70g/L, 75g/L, 80g/L, 85g/L) of an alkaline agent, and stirring for 2-5 min to uniformly dissolve and disperse the alkaline agent to obtain an alkaline solution, wherein the alkaline agent can be one or a mixture of caustic soda, soda ash or strong and weak acid salts; heating the alkaline solution while adding 120-200 g/L (such as 130g/L, 140g/L, 150g/L, 160g/L, 170g/L, 180g/L and 190g/L) of natural plant reduction antibacterial dye, stirring for 10min, boiling for 3-5 min, and uniformly dispersing the reduction dye in the alkaline solution to obtain initial high-concentration dye mother liquor; after the initial high-concentration dye mother liquor is cooled to 40-45 ℃, 60-120 g/L (such as 70g/L, 80g/L and 90g/L) of composite reducing agent is added, and specifically, the reducing agent preferred by the reduction system antibacterial dye can be an environment-friendly composite reducing agent RSW; and (3) rapidly stirring for 5-10 min, supplementing the residual water, and finally slowly stirring for 45min to fully reduce the dye to obtain the natural plant reduction system antibacterial dye leuco body high-concentration mother liquor.
In one embodiment, the preparation method of the natural antibacterial yarn provided by the application takes the natural plant reduction antibacterial dye as a raw material, and dyes the yarn by adopting a leuco dyeing method, so that the prepared yarn has natural antibacterial performance, is simple and efficient, has little environmental pollution, and meets the requirement of environmental protection. Based on the above, the present application also provides a natural antibacterial yarn, which is prepared by the preparation method of the natural antibacterial yarn in any one of the above embodiments.
The application also provides a natural antibacterial fabric which is prepared from any one of the natural antibacterial yarns.
In one embodiment, the natural antimicrobial fabric may be knitted or woven. The natural antibacterial fabric can be prepared from pure natural antibacterial yarns or can be formed by blending natural antibacterial yarns and other yarns. The prepared natural antibacterial fabric can be used for preparing clothes and home textiles and can also be used for preparing towels.
The present application will be illustrated and explained below by means of several groups of specific experimental examples, which should not be construed as limiting the scope of the present application.
The first embodiment is as follows:
the preparation process of the natural antibacterial yarn comprises the following steps:
pre-reducing a natural plant reduction system antibacterial dye;
adding 50% of water into a container, adding 60g/L of an alkaline agent, stirring for 2-5 min, heating, adding 120g/L of plant indigo while heating, stirring for 10min, boiling for 3-5 min, cooling to 40-45 ℃, adding 60g/L of an environment-friendly composite reducing agent RSW, quickly stirring for 5-10 min, supplementing residual water, and finally slowly stirring for 45min to prepare a high-concentration mother solution of the plant indigo dye leuco body for later use;
preparing natural antibacterial yarn: boiling yarn by using 3g/L of penetrating agent and 20g/L of caustic soda, diluting high-concentration mother liquor of leuco body of the indigo dye according to twenty-one-second opening to obtain dyeing working solution, supplementing 3g/L of caustic soda and 3g/L of composite reducing agent RSW in the dyeing working solution to maintain the reducing condition, dyeing the yarn, wherein 4 dye baths are provided, and the dyeing temperature is 35-40 ℃. And after dyeing is finished, cold water washing, oxidizing, soaping, (2g/L soaping agent, soaping for 1min at 90 ℃), and finally washing and drying to obtain the yarn with the natural antibacterial function.
Example two
The preparation process of the natural antibacterial yarn comprises the following steps:
pre-reducing a natural plant reduction system antibacterial dye;
adding 60% of water into a container, adding 100g/L of an alkaline agent, stirring for 2-5 min, heating, adding 200g/L of plant indigo while heating, stirring for 10min, boiling for 3-5 min, cooling to 40-45 ℃, adding 100g/L of an environment-friendly reducing agent RSW, quickly stirring for 5-10 min, supplementing residual water, and finally slowly stirring for 45min to prepare high-concentration mother liquor of the plant indigo dye leuco body for later use;
preparing natural antibacterial yarn: boiling yarn by using 8g/L of penetrating agent and 8g/L of caustic soda, diluting high-concentration mother liquor of leuco body of the indigo dye according to thirty-one-hundred-twenty percent to obtain dyeing working solution, supplementing 3g/L of caustic soda and 13g/L of composite reducing agent RSW in the dyeing working solution to maintain the reducing condition, dyeing the yarn, wherein 6 dye baths are provided, and the dyeing temperature is 35-40 ℃. And after dyeing is finished, washing with cold water, oxidizing, soaping, washing with 2g/L soaping agent for 1min at 90 ℃, and finally washing with water and drying to obtain the natural antibacterial yarn.
EXAMPLE III
The preparation process of the natural antibacterial yarn comprises the following steps:
pre-reducing a bio-based vat olive dye synthesized from natural plant dye pigments;
adding 50% of water into a container, adding 120g/L of alkaline agent, stirring for 5min, heating, adding 200g/L of olive dye while heating, stirring for 10min, heating to 90 ℃, cooling to 40-45 ℃ after 5min, adding 80g/L of environment-friendly composite reducing agent RSD, quickly stirring for 5min, supplementing the rest water, and finally slowly stirring for 45min to prepare high-concentration mother liquor of the olive dye leuco body for later use;
preparing natural antibacterial yarn: boiling yarn by using 3g/L of penetrating agent and 20g/L of caustic soda, diluting the high-concentration mother liquor of the olive color leuco dye according to a first boiling point and a sixty boiling point to obtain a dyeing working solution, supplementing 8g/L of caustic soda and 7g/L of reducing agent RSD into the dyeing working solution, dyeing the yarn, wherein the number of dyeing tanks is 2, and the dyeing temperature is 80-85 ℃. And after dyeing, performing cold water washing, oxidation, soap boiling, (3g/L of soaping agent, soaping for 1min at 90 ℃), and finally washing and drying to obtain the yarn with the natural antibacterial function.
Example four
The preparation process of the natural antibacterial fabric comprises the following steps:
the natural antibacterial yarns in the first embodiment or the second embodiment are subjected to various weaving processes to obtain woven or knitted fabrics, and then pretreatment (singeing, desizing, mercerizing and the like) and after-finishing (beveling and preshrinking) are carried out to obtain the fabrics with the natural antibacterial function. The antibacterial performance of the fabric with the natural antibacterial function under different washing conditions is tested, and the test results are detailed in tables 1 and 2.
EXAMPLE five
A preparation method of natural antibacterial shirt comprises:
and (3) sewing the natural antibacterial fabric in the fourth embodiment to a clothing factory to form a shirt, and then treating the shirt by a washing factory to obtain the shirt with the natural antibacterial function.
EXAMPLE six
A preparation process of natural antibacterial underwear comprises the following steps:
and sewing the clothes by adopting the natural antibacterial fabric in the fourth embodiment to obtain the underwear with the natural antibacterial function.
EXAMPLE seven
A preparation process of a natural antibacterial towel comprises the following steps:
the antibacterial yarn in the first embodiment is adopted to manufacture the yarn-dyed towel. The towel with natural antibacterial function is obtained after treatment.
Table 1 test of antibacterial property of natural antibacterial fabric
As can be seen from table 1, the yarn, fabric and textile dyed by natural plant reduction antibacterial dye of the present invention have antibacterial properties, can meet the consumer's requirements for natural antibacterial and bacteriostatic properties of textiles, and are suitable for making textiles such as shirts, underwear, towels and bedding products. The natural plant reduction system antibacterial dye belongs to an environment-friendly renewable raw material, has small pollution to the environment, can effectively reduce the environment-friendly pressure, and is subjected to washing water treatment, and slurry on the yarn falls off along with washing, so that the antibacterial value of textiles such as shirts, underwear, towels, bedding products and the like prepared by the natural plant reduction system antibacterial dye is continuously improved along with the increase of washing force, and the antibacterial effect is more remarkable.
Table 2 apparent color depth test of natural antibacterial fabric
% owf: percentage of relative fabric
The Kubelka-Munk dyeing depth equation establishes a certain functional relationship between the absorption coefficient K and the scattering coefficient S of a measured object and the concentration C of the colored substances in the solid sample. The larger the K/S value obtained by calculation, the darker the surface color of the solid sample, i.e. the higher the concentration of the colored substance, and the better the dyeing performance of the dye. As can be seen from Table 2, the natural plant vat type antibacterial dyes with different color systems are respectively dyed by a suspension dyeing method and a leuco dyeing method, wherein the dye consumption in the suspension dyeing method is 300-400% of that in the leuco dyeing method, but the apparent color depth K/S value of the dyed fabric is different from that of the leuco dye. Therefore, the result shows that the natural antibacterial fabric dyed by the leuco dye has a color obtaining effect obviously better than that of the suspension dye, and the dye consumption is reduced with the same depth. The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.
Claims (11)
1. A preparation method of natural antibacterial yarn is characterized by comprising the following steps:
carrying out pre-reduction treatment on a natural plant vat series antibacterial dye to obtain a natural plant dye leuco body high-concentration mother solution;
diluting the natural plant dye leuco body high-concentration mother liquor by using normal-temperature water, and adding an alkaline agent and a reducing agent in the dilution process to maintain the reduction condition to obtain a dyeing working solution;
and dyeing the yarn by using the dyeing working solution, and carrying out oxidation, soaping, washing and drying treatment on the dyed yarn to obtain the natural antibacterial yarn.
2. The method for preparing natural antibacterial yarn according to claim 1, wherein the natural plant vat-type antibacterial dye comprises: a dye containing gardenia yellow; indigo dye prepared from one or more of radix Isatidis, folium Isatidis, Isatis tinctoria, and Indigofera tinctoria; and bio-based vat dyes synthesized from natural plant dyes and pigments.
3. The preparation method of the natural antibacterial yarn according to claim 1, wherein the dilution ratio of the normal-temperature water to the high-concentration leuco dye mother liquor is 10-60 times.
4. The method for preparing natural antibacterial yarn according to claim 1, wherein the running length of the yarn passing through the dyeing working solution is more than 28 meters.
5. The method for preparing natural antibacterial yarn according to claim 1, wherein the pre-reduction treatment of the natural plant reduction-type antibacterial dye comprises the following steps:
adding 50-60% of water into a container, then adding 60-120 g/L of an alkaline agent, and stirring for 2-5 min to obtain an alkaline solution;
heating the alkaline solution, adding 120-200 g/L of natural plant reduction antibacterial dye, stirring for 10min, heating to 85-100 ℃, and keeping for 3-5 min to obtain initial high-concentration mother liquor;
and cooling the initial high-concentration mother liquor to 40-45 ℃, adding 60-120 g/L of reducing agent, stirring for 5-10 min, supplementing the rest water, and finally stirring for 30-45 min to obtain the high-concentration mother liquor of the leuco dye.
6. The method for preparing the natural antibacterial yarn according to claim 5, wherein the reducing agent is an environment-friendly composite reducing agent.
7. The method for preparing the natural antibacterial yarn according to any one of claims 1 to 6, wherein the alkaline agent is one or more of caustic soda, soda ash or alkaline substances of strong alkali and weak acid salts.
8. A natural antibacterial yarn, which is prepared by the preparation method of any one of claims 1 to 6.
9. A natural antibacterial fabric, characterized in that the natural antibacterial fabric is prepared from the natural antibacterial yarn of claim 8.
10. The natural antimicrobial fabric of claim 9, wherein the natural antimicrobial fabric is a knitted or woven fabric.
11. The natural antibacterial fabric according to claim 9, wherein the natural antibacterial fabric is prepared from pure natural antibacterial yarns or is formed by blending the natural antibacterial yarns with other yarns.
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| CN115748139A (en) * | 2022-11-22 | 2023-03-07 | 吉祥三宝高科纺织有限公司 | Processing method of bio-based efficient antibacterial yarn |
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| CN104878619A (en) * | 2015-04-28 | 2015-09-02 | 常州纺织服装职业技术学院 | Pre-treatment and dyeing method for natural crystal fibers and blended or interwoven products of natural crystal fibers and other fibers |
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| CN110453510A (en) * | 2019-03-28 | 2019-11-15 | 李瑞卿 | A kind of complex reducing agent and reduction stain method |
| CN110656510A (en) * | 2019-10-15 | 2020-01-07 | 常州大学 | Preparation method of indigo dyed antibacterial textile |
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| CN104878619A (en) * | 2015-04-28 | 2015-09-02 | 常州纺织服装职业技术学院 | Pre-treatment and dyeing method for natural crystal fibers and blended or interwoven products of natural crystal fibers and other fibers |
| CN107365512A (en) * | 2016-05-12 | 2017-11-21 | 雷炳忠 | From a kind of method of the indigo natural dye of Radix Isatidis plant extract |
| CN107059429A (en) * | 2017-03-01 | 2017-08-18 | 嘉兴学院 | A kind of high color fastness whole chromatogram yarn preparation method of use natural dye dying |
| CN110453510A (en) * | 2019-03-28 | 2019-11-15 | 李瑞卿 | A kind of complex reducing agent and reduction stain method |
| CN110656510A (en) * | 2019-10-15 | 2020-01-07 | 常州大学 | Preparation method of indigo dyed antibacterial textile |
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| CN115748139A (en) * | 2022-11-22 | 2023-03-07 | 吉祥三宝高科纺织有限公司 | Processing method of bio-based efficient antibacterial yarn |
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