Bacteriostatic nylon textile and garment and preparation method thereof

Abstract

The invention discloses a bacteriostatic nylon textile and a preparation method thereof, the preparation method of the bacteriostatic nylon textile comprises the following steps: 1) dyeing a nylon textile by using a bio-based dye and / or a natural dye, the bio-based dye and the natural dye containing antibacterial active components; (2) carrying out complexing color fixation on the dyed nylon textile by adopting a mordanting complexing agent, wherein the mordanting complexing agent contains a copper sulfate solution with the mass concentration of 0.5%-3%; and (3) carrying out post-treatment on the nylon textile subjected to complexing and color fixing to obtain the antibacterial nylon textile. The invention further provides a bacteriostatic nylon garment and a preparation method thereof. The prepared nylon garments and textiles have high color fastness and also have excellent antibacterial performance.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of textiles, and particularly relates to a bacteriostatic nylon textile and garment and a preparation method. BACKGROUND

[0002] Nylon fibers are widely used in clothing and apparel due to their excellent performance, and more and more consumers pay attention to the environmental protection problem of nylon textiles when they come into contact with the skin. Nylon is a hydrophobic fiber, and the fiber contains amino and carboxyl groups. At present, most of the dyes used for coloring nylon are synthetic dyes, such as acid dyes or disperse dyes, reactive dyes, etc. A large number of pollutants are generated in the synthesis and production process of chemical dyes, and the environmental protection pressure is great. In addition, some intermediates of synthetic dyes have a certain degree of toxicity, which causes different degrees of harm to human health. Due to the toxicity problem of individual synthetic dyes that have been published, they are restricted or even prohibited from being used in textiles for babies and textiles that directly contact the skin.

[0003] With the enhancement of people's environmental protection consciousness and the pursuit of a healthy lifestyle, more and more people begin to pay attention to the health of textile clothing, and hope to have the functions of bacteriostasis and deodorization while paying attention to the comfort of clothing and textiles. At present, the bacteriostatic and deodorizing method of most nylon clothing and textiles is to immerse and pad the fabric with a finishing liquid containing a chemical antibacterial agent through post-finishing technology. Since the antibacterial components formed are distributed on the surface of the fiber, there are defects such as low degree of combination with the fiber, poor washing resistance, and difficult to maintain antibacterial effect. Moreover, the inorganic antibacterial materials commonly used on the market at present are mainly Ag-containing antibacterial agents, although they have good antibacterial effect, but relevant documents show that nano-silver is not easy to be metabolized and excreted after being absorbed by the human body, and it is harmful to the human body after accumulation. SUMMARY

[0004] In view of all or part of the deficiencies of the prior art described above, the purpose of the present application is to provide a bacteriostatic nylon textile and garment and a preparation method. The prepared nylon textile and nylon garment have high color fastness and excellent bacteriostatic performance.

[0005] To achieve the above-mentioned purpose of the application, the present application provides the following technical solutions:

[0006] The present application relates to a preparation method of a bacteriostatic nylon textile, comprising the following steps:

[0007] 1) dyeing the nylon textile with a bio-based dye and / or a natural dye, wherein the bio-based dye and the natural dye contain antibacterial active ingredients;

[0008] 2) complexing and fixing the color of the dyed nylon textile with a mordant complexing agent, wherein the mordant complexing agent contains at least a copper sulfate solution with a mass concentration of 0.5%-3%;

[0009] 3) After-treatment of the nylon textile after complexation and color fixing to obtain antibacterial nylon textile.

[0010] Natural dyes refer to dyes obtained from plant, animal or mineral resources, which are rarely or not chemically processed. Some natural dyes contain antibacterial active ingredients, thus having antibacterial and bacteriostatic functions. Bio-based dyes are dyes treated with plant pigments and having a natural degree of more than 93% after C-14 detection. Preferred plant pigments contain antibacterial active substances. Natural dyes are usually used for dyeing silk fabrics, but rarely used for dyeing nylon fibers. The reason is that the dyeing effects of natural dyes are quite different when dyeing different types of fibers. For example, when dyeing cotton fibers and linen fibers, the color fastness is very poor, resulting in a soaping fastness or a sunlight fastness of only level 2, a perspiration fastness of acid and alkali of less than level 3 of the standard, which cannot meet the wearing requirements of consumers. When dyeing cotton fibers and linen fibers, the dyeing rate is low, and even if natural dyes containing antibacterial active ingredients are used, the antibacterial effect of the finished product cannot meet the requirements. The conventional chemical dyes cannot simultaneously obtain high color fastness and antibacterial effect when dyeing nylon fibers.

[0011] The selection of the mordant complexing agent will also have a significant impact on the test results of the finished product, especially the color fastness and antibacterial performance. For example, when alum, zinc chloride and the like are used as the mordant complexing agent, the color fastness and antibacterial properties of the finished product cannot meet the requirements. The bio-based dyes and / or natural dyes are used to dye nylon fibers in the present application, and a plurality of mordant complexing agents can be selected according to the characteristics of the bio-based dyes and natural dyes, but at least one mordant complexing agent, i.e. copper sulfate, is required, and the color fastness and antibacterial performance of the finished product can meet the requirements.

[0012] In the existing research, only the use of metal salts to achieve complexation and color fixing is considered, and the mass concentration and suitable amount of the mordant complexing agent are not studied. Generally, the amount of the mordant complexing agent is selected randomly. In fact, when the gram weight and the proportion of nylon fibers on the surface of the fabric are different, the suitable amount of the mordant complexing agent also differs. The greater the gram weight, the more the mordant complexing agent is required. When the proportion of nylon fibers on the surface of the fabric is high, the amount of the mordant complexing agent is also relatively high. Because the amount of the mordant complexing agent will directly affect the color fastness and antibacterial performance, on the basis that the amount of the mordant complexing agent can achieve the requirements of color fastness and antibacterial performance, selecting a suitable upper limit of the amount range is considered from the economic cost, and when the amount is too large, the uncombined mordant complexing agent leads to serious copper ion dissolution, and the residual copper ions may harm human health, which is not involved in the previous research.

[0013] When the nylon textile is dyed by using the bio-based dye and / or the natural dye, by using the mordant complexing agent mainly composed of copper sulfate and controlling the mass concentration of copper sulfate to be 0.5%-3%, the high color fastness of the dyed nylon textile can be ensured, the excellent antibacterial rate is also achieved, the residual amount of copper sulfate in the nylon textile is low, and the human health is not affected; in the textile washing process, the copper ion dissolution is low, the antibacterial effect is achieved, and the influence on the environment is reduced. Meanwhile, the copper ion in the mordant complexing agent copper sulfate can also consolidate the antibacterial effect to a certain extent. By using the copper sulfate working solution with the above specific mass concentration, the residual amount of copper ion in the nylon textile is low, even when the human body sweats, the residual and precipitated amount of copper ion is also low, and the discomfort symptoms such as allergy are not caused.

[0014] The surface nylon fiber of the nylon textile is greater than or equal to 70% by floating point ratio, otherwise the ash style or flash color phenomenon is prone to occur.

[0015] The antibacterial active ingredient is selected from the combination of one or more of anthocyanins, flavonoids and tannins. The bio-based dye and / or the natural dye are extracted from natural products selected from the combination of one or more of fresh mulberry, dried mulberry, black medlar, purple sweet potato, fresh blueberry, dried blueberry, Acanthospermum hispidum, gardenia fruit and gallnut. Anthocyanins belong to flavonoids, which can scavenge free radicals in the human body; tannins can be combined with nylon fibers by hydrogen bonds, and also have strong ultraviolet absorption function, which can improve the yellowing phenomenon of nylon fibers after ultraviolet irradiation and improve the sunlight fastness level of nylon textiles. Anthocyanins, flavonoids and tannins contain multiple phenolic hydroxyl groups, so they have strong polarity and can interact with polar groups in nylon textiles, and can form stable chelates after complexing with metals. Under the complexation of copper sulfate, the color fastness of the nylon textile can be obviously improved, the antibacterial active ingredient in the dye is attached to the nylon textile for a long time, and the excellent antibacterial performance of the nylon textile can be achieved. According to the different properties of the dye, the mordant complexing agent mainly composed of copper sulfate is preferred, which can consolidate and improve the antibacterial effect of the nylon textile, and ensure that the dyed nylon textile reaches a high dyeing fastness.

[0016] In the dyeing process: the dyeing temperature is 75-90℃, the dyeing temperature is too low to affect the dyeing rate, and the temperature is too high to cause damage to the nylon fibers; and / or, the dyeing time is 30-40min; and / or, the bath ratio of the dyeing is 1:10-30; and / or, the mass concentration of the bio-based dye and / or the natural dye is 0.3%-20%.

[0017] In the complexing and fixing process, the temperature of the complexing and fixing is 70-80 DEG C, and / or the time of the complexing and fixing is 20-30 min, and / or the bath ratio of the complexing and fixing is 1:10-30, and the mordant complexing agent preferably mainly contains copper sulfate, and according to different dyes, ferrous sulfate can also be contained.

[0018] The dyeing method is dip dyeing, and a non-ionic penetrant is added during dyeing, and the mass concentration of the non-ionic penetrant is 0.3%-1%.

[0019] Before dyeing, the nylon textile is pretreated by using a pretreatment liquid, the pretreatment liquid comprises a refining agent, an alkali and a penetrant and is prepared by mixing them in a certain proportion (i.e., a pretreatment working liquid), and the pretreatment further comprises a washing and / or drying process.

[0020] The application further discloses a bacteriostatic nylon textile prepared by the preparation method of the bacteriostatic nylon textile.

[0021] The application further discloses a preparation method of bacteriostatic nylon clothes, comprising the following steps.

[0022] 1) dyeing the nylon clothes by using bio-based dyes and / or natural dyes, wherein the bio-based dyes and the natural dyes contain antibacterial active ingredients;

[0023] 2) complexing and fixing the dyed nylon clothes by using a mordant complexing agent, wherein the mordant complexing agent contains at least 0.5%-3% of copper sulfate solution in mass concentration;

[0024] 3) post-treating the complexed and fixed nylon clothes to obtain the bacteriostatic nylon clothes.

[0025] The application further discloses bacteriostatic nylon clothes prepared by the preparation method of the bacteriostatic nylon clothes.

[0026] Compared with the prior art, the application has the following beneficial effects:

[0027] (1) The bio-based dyes and / or natural dyes are used to dye the nylon textile, and compared with chemical dyes, the wastewater pollution generated in the whole product life cycle is small, and the treatment difficulty is small, and the use of natural products and plant pigments as raw materials for dye extraction is conducive to ensuring environmental protection and meeting the concept of sustainable development.

[0028] (2) The application preferably uses copper sulfate as the main mordant complexing agent, and the mass concentration of the copper sulfate working solution is controlled to be 0.5%-3%, so that the colored nylon garments and textiles have high color fastness, the antibacterial rate of Staphylococcus aureus, Escherichia coli and Candida albicans can reach about 80% or above (in some experiments, it can reach more than 98%, even more than 99%), and the antibacterial rate is excellent; at the same time, the residual amount of copper sulfate in the nylon textiles or garments is low, which does not affect human health, and does not cause allergies even when sweating, that is, the antibacterial effect and environmental protection harmless effect can be considered at the same time, and the product has high added value and can be used to make high-grade garments and various textiles.

[0029] (3) The application uses the antibacterial active substances in natural plants to impart antibacterial effect to nylon fibers and fabrics during dyeing, that is, the antibacterial performance can be achieved without adding chemical antibacterial additives. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the specific embodiments of the application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings described below are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0031] Figure 1 A flowchart of a preparation method of the antibacterial nylon textile provided by the application is shown. DETAILED DESCRIPTION

[0032] The technical solutions in the specific embodiments of the application will be described clearly and completely below. Obviously, the described embodiments are only some of the embodiments of the application, not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the application.

[0033] REFERENCE Figure 1 The application provides a preparation method of an antibacterial nylon textile, which comprises the following steps:

[0034] (1) Pretreatment: pretreat the nylon textile with a pretreatment liquid, the pretreatment liquid includes a refining agent with a mass concentration of 3-5 g / L, sodium carbonate with a mass concentration of 3-5 g / L, and a penetrant with a mass concentration of 1-3 g / L, the pretreatment temperature is 90-95°C, and the pretreatment time is 40-50 min. Drain the pretreatment liquid, and wash the pretreated nylon textile with water. The water washing is washing with 70-80°C hot water for 10-20 min, then neutralizing washing with 50-60°C warm water added with 1-2 g / L glacial acetic acid for 5-10 min, and finally cold water washing for 5-10 min. Dry the nylon textile and wait for use. Preferably, the water washing is washing with 70°C hot water for 10 min, and then neutralizing washing with 50°C warm water added with 1 g / L glacial acetic acid for 5 min. The addition of glacial acetic acid can quickly and effectively neutralize the residual sodium carbonate.

[0035] (2) Dyeing: dye the pretreated nylon textile with a dyeing working liquid containing a bio-based dye and / or a natural dye with a mass concentration of 0.3%-20% and a non-ionic penetrant with a mass concentration of 0.5%-1% according to a bath ratio of 1:10-30; the dyeing temperature is 75-90°C, and the dyeing time is 30-40 min. Drain the dyeing working liquid, and wash the dyed nylon textile with water; the water washing is cold water washing once, and the water washing time is about 10-15 min.

[0036] (3) Complexation and color fixing: complex and fix the color of the dyed nylon textile with a copper sulfate solution with a mass concentration of at least 0.5%-3% according to a bath ratio of 1:10-30; the complexation and color fixing temperature is 70-80°C, and the complexation and color fixing time is 20-30 min. Preferably, the mass concentration of the solution of the mordant complexing agent is 1%-2%. Through multiple tests, the mordant complexing agent can balance the cost and dyeing performance at 1-2%.

[0037] (4) Post-treatment: drain the solution of the mordant complexing agent, wash and dry the complexed and color fixed nylon textile, and obtain the antibacterial nylon garment. The water washing includes washing with 70-80°C hot water for 20-30 min, then adding a soaping agent with a mass concentration of 1-3 g / L at 80-85°C for soaping for 10-20 min according to a bath ratio of 1:10-1:30, then washing with 60-70°C hot water for 10-20 min, and finally cold water washing for 10-15 min.

[0038] The application provides a preparation method of an antibacterial nylon garment, including the following steps:

[0039] (1) Pretreatment: the nylon garment is pretreated with a pretreatment liquid, the pretreatment liquid includes 1-3 g / L of refining agent, 1-3 g / L of sodium carbonate and 0.5-2 g / L of penetrant, the pretreatment temperature is 90-95 ℃, and the pretreatment time is 20-30 min. The pretreatment liquid is discharged, and the pretreated nylon garment is washed with water. The water washing is washing with 70-80 ℃ hot water for 10-20 min, washing with 50-60 ℃ warm water for 5-10 min, and finally washing with cold water for 5-10 min. The nylon garment is dried and ready for use. Preferably, the water washing is washing with 70 ℃ hot water for 10 min, and washing with 50 ℃ warm water for 5 min.

[0040] (2) Dyeing: the pretreated nylon garment is dyed with a dyeing working liquid containing 0.3%-20% of bio-based dye and / or natural dye and 0.1%-0.5% of non-ionic penetrant according to a bath ratio of 1:10-30; the dyeing temperature is 75-90 ℃, and the dyeing time is 20-30 min. The dyeing working liquid is discharged, and the dyed nylon garment is washed with water; the water washing is cold water washing once, and the water washing time is about 10-15 min.

[0041] (3) Complexation and color fixing: the dyed nylon garment is subjected to complexation and color fixing with a solution containing at least 0.5%-3% of copper sulfate according to a bath ratio of 1:10-30, the complexation and color fixing temperature is 70-80 ℃, and the complexation and color fixing time is 20-30 min. Preferably, the mass concentration of the solution of the mordant complexing agent is 1%-2%.

[0042] (4) Post-treatment: the complexed and color fixed nylon garment is washed with water and dried to obtain the antibacterial nylon garment. The water washing includes washing with 70-80 ℃ hot water for 20-30 min, adding 1-3 g / L of soaping agent according to a bath ratio of 1:10-1:30 at 80-85 ℃ for soaping for 10-20 min, washing with 60-70 ℃ hot water for 10-20 min, and cold water washing for 10-15 min.

[0043] The natural dye containing anthocyanins in the following examples refers to a natural dye extracted from fresh mulberry, dried mulberry, black medlar, purple sweet potato, fresh blueberry or dried blueberry; the bio-based dye mainly containing gallnut contains a high content of tannin chemicals; the bio-based dye mainly containing gardenia fruit contains a high content of flavonoids, and the Acanthospermum hispidum dye refers to a natural dye extracted from the plant Acanthospermum hispidum.

[0044] Example 1

[0045] The embodiment provides a bacteriostatic and deodorant nylon yoga suit (a specific implementation of a bacteriostatic nylon ready-to-wear garment, wherein the surface nylon fiber is 90% by floating point, and the gram weight is 120 g / m2), and a preparation method thereof is as follows:

[0046] (1) Pretreatment: the nylon yoga suit is pretreated by using a pretreatment liquid (specifically, a soaking method), after the dye is put in, the pretreatment liquid is injected in the dye vat according to a bath ratio of 1:30, the pretreatment liquid comprises 1 g / L of a refining agent, 1 g / L of sodium carbonate and 2 g / L of a penetrating agent, the pretreatment temperature is 95 DEG C, and the pretreatment time is 30 min. The pretreatment liquid is discharged, and the pretreated nylon yoga suit is washed with water; the water washing is washing with 70 DEG C hot water for 10 min, washing with 60 DEG C warm water for 5 min, and finally washing with cold water for 5 min.

[0047] (2) Dyeing: the pretreated nylon yoga suit is dyed by using a dyeing working liquid containing 1% of Ageratum conyzoides natural dye and 0.1% of a non-ionic penetrating agent according to a bath ratio of 1:20; the dyeing temperature is 80 DEG C, and the dyeing time is 20 min. The dyeing working liquid is discharged, and the dyed nylon yoga suit is washed with water; the water washing is cold water washing once, and the water washing time is about 10 min.

[0048] (3) Complexation and color fixing: the dyed nylon yoga suit is subjected to complexation and color fixing by using a copper sulfate solution (a mordant complexing agent) containing 1.0% of the copper sulfate solution according to a bath ratio of 1:20, the complexation and color fixing temperature is 70 DEG C, and the complexation and color fixing time is 20 min.

[0049] (4) Post-treatment: the solution of the mordant complexing agent is discharged, the nylon yoga suit after the complexation and color fixing is washed with water and dried (dehydration and loose drying in the embodiment), and a bacteriostatic and deodorant nylon yoga suit is obtained. The water washing comprises washing with 70 DEG C hot water for 20 min, then adding 1 g / L of a soaping agent according to a bath ratio of 1:20, soaping at 85 DEG C for 10 min, washing with 60 DEG C hot water for 10 min, and washing with cold water for 10 min.

[0050] Comparative Example 1

[0051] The comparative example provides a bacteriostatic and deodorant nylon yoga suit (the surface nylon is 90% by floating point, and the gram weight is 120 g / m2), and a preparation method thereof is basically same as that of the embodiment 1, except that alum is used to replace copper sulfate as a mordant complexing agent.

[0052] Comparative Example 2

[0053] The comparative example provides a bacteriostatic and deodorant nylon yoga suit (the surface nylon is 90% by float point, and the grammage is 120 g / m2), and the preparation method is basically the same as that of example 1, and the difference is only that the mass concentration of the mordant complexing agent copper sulfate is adjusted to 3.3%, and the rest is unchanged.

[0054] Example 2

[0055] The example provides a bacteriostatic and deodorant nylon seamless underwear (the surface nylon fiber is 70% by float point, and the grammage is 85 g / m2, which is a specific embodiment of a bacteriostatic nylon garment), and the preparation method is as follows:

[0056] (1) Pretreatment: The nylon seamless underwear is pretreated by using a pretreatment liquid (specifically by soaking), after the dye is put in, the pretreatment liquid is injected into the dye vat according to the bath ratio of 1:30, the pretreatment liquid includes 3 g / L of refining agent, 3 g / L of sodium carbonate and 0.5 g / L of penetrating agent, the pretreatment temperature is 90-95°C, and the pretreatment time is 20 min. The pretreatment liquid is discharged, and the pretreated nylon seamless underwear is washed with water; the water washing is washed with 80°C hot water for 20 min, then washed with 50°C warm water for 10 min, and finally washed with cold water for 10 min.

[0057] (2) Dyeing: The pretreated nylon seamless underwear is dyed by using a dyeing working liquid containing 20% of Ageratum conyzoides natural dye and 0.5% of non-ionic penetrating agent according to the bath ratio of 1:30; the dyeing temperature is 80°C, and the dyeing time is 30 min. The dyeing working liquid is discharged, and the dyed nylon seamless underwear is washed with water, and the water washing time is about 10-15 min.

[0058] (3) Complexing and fixing: The dyed nylon seamless underwear is complexed and fixed by using a copper sulfate solution (mordant complexing agent) containing 0.5% of mass concentration according to the bath ratio of 1:30, the complexing and fixing temperature is 80°C, and the complexing and fixing time is 30 min.

[0059] (4) Post-treatment: The solution of the mordant complexing agent is discharged, and the complexed and fixed nylon seamless underwear is washed with water and dried (dehydration and loose drying in this example), to obtain the bacteriostatic and deodorant nylon seamless underwear. The water washing includes washing with 80°C hot water for 30 min, then adding 3 g / L of soaping agent according to the bath ratio of 1:30 at 85°C for soaping for 20 min, then washing with 70°C hot water for 20 min, and washing with cold water for 15 min.

[0060] Comparative example 3

[0061] The comparative example provides a kind of antibacterial nylon seamless underwear (surface nylon fiber is by float point ratio 70%, gram weight 85 grams per square meter), its preparation method is basically same with example 2, the difference is only in that: the mass concentration of mordant complexing agent copper sulfate is adjusted to 0.4%, unchanged otherwise.

[0062] Example 3

[0063] The example provides a kind of antibacterial nylon fabric (surface nylon fiber is by float point ratio 80%, gram weight 100 grams per square meter, for a specific embodiment of antibacterial nylon textile), its preparation method is as follows:

[0064] (1) pretreatment: pretreatment liquid is used to pretreat nylon fabric (specifically by soaking method), after dyeing fabric is placed, according to 1:30 bath ratio, pretreatment liquid is injected in dyeing vat, and the pretreatment liquid includes 5g / L refining agent, 3g / L sodium carbonate and 1g / L penetrant, the pretreatment temperature is 95 DEG C, and the pretreatment time is 50 min. Pretreatment liquid is discharged, and the pretreated nylon fabric is washed, and the washing is washed with 70 DEG C hot water for 10 min, then neutralized with 50 DEG C warm water added with glacial acetic acid 1 gram / L for 5 min, and finally cold water washing for 5 min.

[0065] (2) dyeing: according to 1:10 bath ratio, dyeing working solution containing 2% of Eupatorium odoratum natural dye and 0.5% of non-ionic penetrant is used to dye the pretreated nylon fabric; The dyeing temperature is 75 DEG C, and the dyeing time is 30 min. Dyeing working solution is discharged, and the dyed nylon fabric is washed, and the washing is cold water washing once, and the washing time is about 10 min.

[0066] (3) complexation and color fixing: according to 1:10 bath ratio, 2% of copper sulfate solution (mordant complexing agent) is used to complex and fix the color of the dyed nylon fabric, and the complexation and color fixing temperature is 70 DEG C, and the complexation and color fixing time is 20 min.

[0067] (4) post-treatment: the solution of mordant complexing agent is discharged, and the nylon fabric after complexation and color fixing is washed and dried (flat stenter drying in this example), to obtain antibacterial nylon fabric. Washing includes washing with 70 DEG C hot water for 20 min, then adding 1g / L soaping agent according to 1:10 bath ratio at 85 DEG C for 10 min, then washing with 60 DEG C hot water for 10 min, and cold water washing for 10 min.

[0068] (5) antibacterial nylon fabric can also be made into antibacterial nylon clothes and other textiles after ironing or cutting.

[0069] Comparative example 4

[0070] A full cotton fabric (gram weight 120 g / m2) is provided, and a preparation method thereof is specifically as follows:

[0071] (1) Pretreatment: a pretreatment liquid is used to pretreat the full cotton fabric (specifically in the way of a jigger cylinder), after the dyed fabric is put in, a pretreatment liquid is injected in the dye vat according to a bath ratio of 1:30, the pretreatment liquid includes a refining agent with a mass concentration of 5 g / L, 3 g / L of sodium carbonate, 1 g / L of a penetrating agent, the pretreatment temperature is 95 ℃, and the pretreatment time is 50 min. The pretreatment liquid is discharged, and the pretreated full cotton fabric is washed with water, the water washing is performed with 80 ℃ hot water for 10 min, then the fabric is washed with 60 ℃ warm water to which 1 g / L of glacial acetic acid is added for 10 min, and finally the fabric is washed with cold water for 10 min.

[0072] (2) Dyeing: the pretreated full cotton fabric is dyed with a dyeing working liquid containing 2% of a natural Ageratina adenophora dye and 0.5% of a non-ionic penetrating agent according to a bath ratio of 1:10; the dyeing temperature is 75 ℃, and the dyeing time is 30 min. The dyeing working liquid is discharged, and the dyed fabric is washed with water, and the water washing is performed once with cold water for 15 min.

[0073] (3) Complexation and color fixing: the dyed full cotton fabric is subjected to complexation and color fixing with a zinc chloride solution (a mordant complexing agent) containing 2% of a mass concentration according to a bath ratio of 1:10, the complexation and color fixing temperature is 70 ℃, and the complexation and color fixing time is 20 min.

[0074] (4) Post-treatment: the solution of the mordant complexing agent is discharged, and the complexed and color fixed fabric is washed with water and dried (in this embodiment, flat width tentering drying), and the color depth is only 30% of the depth of the nylon fabric in Example 3. The water washing includes hot water washing at 70 ℃ for 20 min, then 1 g / L of a soaping agent is added according to a bath ratio of 1:10, and soaping is performed at 85 ℃ for 15 min, then hot water washing is performed at 60 ℃ for 20 min, and cold water washing is performed for 10 min.

[0075] Example 4

[0076] This embodiment provides a bacteriostatic nylon fabric (the surface nylon fiber has a floating point ratio of 80% and a gram weight of 100 g / m2), and a preparation method thereof is specifically as follows:

[0077] (1) Pretreatment: the nylon fabric is pretreated by using a pretreatment liquid (specifically by soaking), after the dyed fabric is put in, the pretreatment liquid is injected in the dye vat according to a bath ratio of 1:30, the pretreatment liquid includes a refining agent with a mass concentration of 3 g / L, sodium carbonate with a mass concentration of 5 g / L, and a penetrating agent with a mass concentration of 3 g / L, the pretreatment temperature is 90°C, and the pretreatment time is 40 min. The pretreatment liquid is discharged, and the pretreated nylon fabric is washed with water, the water washing is washing with 80°C hot water for 20 min, then washing with 60°C warm water added with glacial acetic acid 2 g / L for 10 min, and finally washing with cold water for 10 min.

[0078] (2) Dyeing: the pretreated nylon fabric is dyed by using a dyeing working liquid containing gardenia fruit bio-based dyes with a mass concentration of 20% and a non-ionic penetrating agent with a mass concentration of 0.8% according to a bath ratio of 1:20. The dyeing starts at room temperature, and the dyeing is performed at a temperature rising rate of 1°C / min to 90°C for 40 min. The temperature rises from room temperature, and the dyeing is not easy to cause color change at a temperature rising rate of 1°C / min. The dyeing working liquid is discharged, and the dyed nylon fabric is washed with water, and the water washing is cold water washing once, and the water washing time is about 15 min.

[0079] (3) Complexation and color fixing: the dyed nylon fabric is subjected to complexation and color fixing by using a copper sulfate solution (mordant complexing agent) with a mass concentration of 3% according to a bath ratio of 1:20, the complexation and color fixing temperature is 80°C, and the complexation and color fixing time is 30 min.

[0080] (4) Post-treatment: the complexation and color fixed nylon fabric is washed with water and dried (flat stenter drying in this embodiment), to obtain the antibacterial nylon fabric. The water washing includes washing with 80°C hot water for 30 min, then adding a soaping agent with a mass concentration of 3 g / L according to a bath ratio of 1:20, soaping at 85°C for 20 min, and then washing with 70°C hot water for 20 min and cold water for 15 min.

[0081] Example 5

[0082] This embodiment provides an antibacterial nylon fabric (the surface nylon fiber has a floating point ratio of 80% and a grammage of 100 g / m2), and the preparation method is specifically as follows:

[0083] (1) Pretreatment: the nylon fabric is pretreated by using a pretreatment liquid (specifically by soaking), after the dyed fabric is put in, the pretreatment liquid is injected in the dye vat according to a bath ratio of 1:30, the pretreatment liquid includes a refining agent with a mass concentration of 5 g / L, sodium carbonate with a mass concentration of 5 g / L, and a penetrant with a mass concentration of 1 g / L. The pretreatment is started at room temperature and is heated to 90℃ at a rate of 2℃ / min, and the pretreatment lasts for 50 min. The pretreatment liquid is discharged, and the pretreated nylon fabric is washed with water, the water washing is washing with hot water at 70℃ for 10 min, then washing with 50℃ warm water to which 1 g / L of glacial acetic acid is added for 5 min, and finally washing with cold water for 5 min.

[0084] (2) Dyeing: the pretreated nylon fabric is dyed by using a dyeing working liquid containing anthocyanin natural dye with a mass concentration of 5%, Acanthospermum hispidum natural dye with a mass concentration of 5%, and non-ionic penetrant with a mass concentration of 0.8%, according to a bath ratio of 1:30. The dyeing is started at room temperature and is heated to 85℃ at a rate of 1℃ / min, and the dyeing lasts for 30 min. The dyeing working liquid is discharged, and the dyed nylon fabric is washed with water, the water washing is cold water washing once, and the water washing time is about 10 min.

[0085] (3) Complexation and color fixing: the dyed nylon fabric is subjected to complexation and color fixing by using a copper sulfate solution (mordant complexing agent) with a mass concentration of 0.5% according to a bath ratio of 1:30, and is heated to 70℃ at a rate of 1℃ / min, and the complexation and color fixing lasts for 20 min.

[0086] (4) Post-treatment: the complexed and color fixed nylon fabric is washed with water and dried (in this embodiment, it is flat width tentering drying), and an antibacterial nylon fabric is obtained. The water washing includes washing with hot water at 80℃ for 20 min. Then, a soaping agent with a mass concentration of 3 g / L is added according to a bath ratio of 1:10, and soaping is performed at 85℃ for 20 min, then washing with hot water at 70℃ for 20 min, and washing with cold water for 15 min.

[0087] Example 6

[0088] This embodiment provides an antibacterial nylon fabric (the surface nylon fiber has a floating point ratio of 80% and a grammage of 100 g / m2), and a preparation method thereof is specifically as follows:

[0089] (1) Pretreatment: The pretreatment liquid is used to pretreat the nylon fabric (specifically in the form of soaking). After the dyed fabric is put in, the pretreatment liquid is injected into the dye vat according to a bath ratio of 1:15. The pretreatment liquid includes a refining agent with a mass concentration of 5 g / L, sodium carbonate with a mass concentration of 4 g / L, and a penetrant with a mass concentration of 1 g / L. The pretreatment is started at room temperature and is heated to 90°C at a rate of 2°C / min for 50 min. The pretreatment liquid is discharged, and the pretreated nylon fabric is washed with water. The washing with water is performed by using 70°C hot water for 10 min, 50°C warm water with 1 g / L of glacial acetic acid for 5 min, and cold water for 5 min.

[0090] (2) Dyeing: The pretreated nylon fabric is dyed with a dyeing working liquid containing 5% of Eupatorium odoratum natural dye and 0.5% of non-ionic penetrant according to a bath ratio of 1:15. The dyeing is started at room temperature and is heated to 75°C at a rate of 1°C / min for 40 min. The dyeing working liquid is discharged, and the dyed nylon fabric is washed with water. The washing with water is performed by using cold water once for about 10 min.

[0091] (3) Complexation and color fixing: The dyed nylon fabric is subjected to complexation and color fixing with a copper sulfate solution (mordant complexing agent) containing 0.5% of copper sulfate according to a bath ratio of 1:15. The complexation and color fixing are performed at a rate of 1°C / min to 80°C for 30 min.

[0092] (4) Post-treatment: The complexed and color-fixed nylon fabric is washed with water and dried (flat stretching drying in this example) to obtain the antibacterial nylon fabric. The washing with water includes washing with 80°C hot water for 20 min. Then, 3 g / L of soaping agent is added according to a bath ratio of 1:10 for soaping at 85°C for 20 min, and then washing with 70°C hot water for 20 min and cold water for 15 min.

[0093] Comparative Example 5

[0094] This comparative example provides an antibacterial nylon fabric (the surface nylon fiber has a floating point ratio of 80% and a grammage of 100 g / m2), and the preparation method is basically the same as that of Example 6, except that the mass concentration of the mordant complexing agent copper sulfate is adjusted to 5%, and the rest remains unchanged.

[0095] Example 7

[0096] This example provides an antibacterial nylon sunscreen sleeve and glove (the surface nylon fiber has a floating point ratio of 80% and a grammage of 65 g / m2, which is a specific embodiment of an antibacterial nylon garment), and the preparation method is as follows:

[0097] (1) Pretreatment: The pretreatment liquid is used for pretreating the nylon sunscreen sleeve and glove (specifically in the form of immersion). After the dye is put in, the pretreatment liquid is injected in the dye vat according to the bath ratio of 1:20. The pretreatment liquid includes 3 g / L of refining agent, 1 g / L of sodium carbonate and 0.5 g / L of penetrant. The pretreatment is performed at room temperature and the temperature is increased to 90°C at a rate of 2°C / min for 30 min. The pretreatment liquid is discharged, and the pretreated nylon sunscreen sleeve and glove are washed with water. The water washing is performed by using 70°C hot water for 10 min, 50°C warm water for 5 min and cold water for 5 min.

[0098] (2) Dyeing: The dyeing working liquid containing 3% of bio-based dye mainly composed of galls and 0.5% of non-ionic penetrant is used for dyeing the pretreated nylon sunscreen sleeve and glove according to the bath ratio of 1:20. The dyeing is performed at room temperature and the temperature is increased to 90°C at a rate of 1°C / min for 30 min. The dyeing working liquid is discharged, and the dyed nylon sunscreen sleeve and glove are washed with water. The water washing is performed by using cold water once, and the water washing time is about 15 min.

[0099] (3) Complexation and color fixing: The mordant complexing agent containing 3% of copper sulfate solution and 6% of ferrous sulfate is used for complexation and color fixing of the dyed nylon sunscreen sleeve and glove according to the bath ratio of 1:20. The complexation and color fixing is performed at a rate of 1°C / min to 70°C for 30 min.

[0100] (4) Post-treatment: The solution of the mordant complexing agent is discharged, and the complexed and color fixed nylon sunscreen sleeve and glove are washed with water and dried (radio frequency drying in this example) to obtain the antibacterial nylon sunscreen sleeve and glove. The water washing includes using 80°C hot water for 30 min, adding 3 g / L of soaping agent according to the bath ratio of 1:20 at 85°C for soaping for 20 min, using 70°C hot water for 10 min and cold water for 15 min.

[0101] Comparative Example 6

[0102] A full cotton glove (gram weight 65 g / m2) is provided, and the preparation method is specifically as follows:

[0103] (1) Pretreatment: The pretreatment liquid is used for pretreating the full cotton glove (specifically in the form of immersion). After the dye is put in, the pretreatment liquid is injected in the dye vat according to the bath ratio of 1:20. The pretreatment liquid includes 3 g / L of refining agent, 1 g / L of sodium carbonate and 0.5 g / L of penetrant. The pretreatment is performed at room temperature and the temperature is increased to 90°C at a rate of 2°C / min for 30 min. The pretreatment liquid is discharged, and the pretreated glove is washed with water. The water washing is performed by using 80°C hot water for 10 min, 60°C warm water for 10 min and cold water for 10 min.

[0104] (2) Dyeing: The pretreated cotton gloves were dyed with a dyeing liquor containing 3% of a bio-based dye mainly composed of galls and 0.5% of a non-ionic penetrant at a liquor ratio of 1:20. The dyeing was started at room temperature and was carried out at a temperature rising rate of 1°C / min to 90°C for 30 min. The dyeing liquor was discharged and the dyed cotton gloves were washed with cold water for 15 min.

[0105] (3) Mordanting and fixing: The dyed cotton gloves were mordanted and fixed with a mordanting complexing agent containing 3% of copper sulfate solution and 6% of ferrous sulfate at a liquor ratio of 1:20. The mordanting and fixing were carried out at a temperature rising rate of 1°C / min to 80°C for 30 min.

[0106] (4) Post-treatment: The mordanted and fixed gloves were washed and dried (radio frequency drying in this example) after the mordanting complexing agent was discharged. The color depth of the obtained gloves was only about 10% of that of Example 7 (very light). The washing included hot water washing at 80°C for 30 min, addition of a soaping agent at a mass concentration of 3 g / L at a liquor ratio of 1:20 at 85°C for 20 min (coloring was seriously dissolved and decolorized during soaping), hot water washing at 70°C for 20 min, and cold water washing for 15 min.

[0107] The textile or garment prepared in Examples 1-7 and Comparative Examples 1-6 was tested for color fastness and antibacterial performance. The sweat fastness, soaping fastness, and light fastness were tested according to GB / T 3922, GB / T 3921-2008, and GB / T 8427-2008, respectively. The antibacterial performance was tested according to GB / T 20944.3-2008. The test results are shown in Tables 1 and 2.

[0108] Table 1 Color fastness of the textile or garment prepared in each example and comparative example

[0109]

[0110]

[0111] Table 2 Antibacterial performance of the textile or garment prepared in each example and comparative example

[0112]

[0113]

[0114] The textile or garment prepared in the above Examples 1-7 and Comparative Examples 2, 3, 5 was subjected to heavy metal copper ion elution test, wherein the simulated hand washing refers to AATCC LP2-2018e (2020) hand washing standard, and the simulated sweating refers to the standard method for sweat stain fastness and residual liquid detection of Suzhou University. The test results are shown in Tables 3 and 4.

[0115] Table 3 Heavy metal copper ion elution performance of textile or garment during simulated hand washing

[0116]

[0117]

[0118] As can be seen from Table 3, there is elution phenomenon during washing of the textile, when the mass concentration of the mordant complexing agent, i.e. copper sulfate solution, is controlled in the range of 0.5%-3%, the copper ion content in the wastewater after washing is not high, which is lower than the limit of 50 ppm. However, when the amount of copper sulfate is too large, for example, the mass concentration of copper sulfate in Comparative Example 5 is 5%, the residual amount of copper sulfate after complexation reaction is large, which leads to more elution after washing, and the copper ion content is seriously over-standard, which causes harm to the environment water.

[0119] Table 4 Heavy metal copper ion elution performance of textile or garment during simulated sweating

[0120]

[0121] In the above Table 1, the larger the number of various color fastnesses, the better the corresponding color fastness. As can be seen from Tables 1-4, the preferred copper sulfate is used as the mordant complexing agent in the present application, which can improve the various color fastnesses and antibacterial rates of the nylon textile or garment (under the condition of the same amount of dye, the color depth of nylon is obviously deep, the color fastness is obviously high, and the antibacterial effect is also greatly different) compared with other commonly used mordant complexing agents such as alum (Comparative Example 1) or zinc chloride (Comparative Example 4). For example, the purple stem zeora dye is used in Example 3, and the yellow-green color fastness is good; the gallnut dye is used in Example 7, and the black color obtained by adding copper sulfate and ferrous sulfate has good fastness. When the mass concentration of the mordant complexing agent copper sulfate is lower than 0.5% (for example, Comparative Example 3), the nylon textile or garment cannot obtain the antibacterial performance meeting the quality standard, and when the mass concentration of the mordant complexing agent copper sulfate is higher than 3%, the copper ion elution in the wastewater and sweat during washing exceeds the standard, which may not meet the requirements of environmental protection and health. In summary, the performance of Example 3 is very excellent in the color fastness test and antibacterial performance test, and the copper ion elution performance also meets the requirements. The mass concentration range of copper sulfate selected by the present application after experiment can realize efficient antibacterial performance, and is also healthy and environmentally friendly.

[0122] The above description of the embodiments is only used to help understand the method and core idea of the present application. It should be noted that, for those skilled in the art, without departing from the principle of the present application, some improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A method for preparing an antibacterial nylon textile, comprising the following steps: 1) Dyeing nylon textiles with bio-based dyes and / or natural dyes, wherein the bio-based dyes and the natural dyes contain antibacterial active ingredients; 2) A mordant complexing agent is used to complex and fix the dyed nylon textiles, wherein the mordant complexing agent contains a copper sulfate solution with a mass concentration of 0.5%-3%; 3) After complexing and fixing, the nylon textiles are post-treated to obtain antibacterial nylon textiles.

2. The method for preparing an antibacterial nylon textile according to claim 1, characterized in that, The surface nylon fibers of the nylon textile have a floating point ratio of greater than or equal to 70%.

3. The method for preparing an antibacterial nylon textile according to claim 1, characterized in that, The antibacterial active ingredient is selected from one or more combinations of anthocyanins, flavonoids, and tannins.

4. The method for preparing an antibacterial nylon textile according to claim 1, characterized in that, During the dyeing process: the mass concentration of the bio-based dye and / or the natural dye is 0.3%-20%, the dyeing bath ratio is 1:10-30, the dyeing temperature is 75-90℃, and the dyeing time is 30-40min.

5. The method for preparing an antibacterial nylon textile according to claim 1, characterized in that, During the complexation and color-fixing process: the complexation and color-fixing bath ratio is 1:10-30, the complexation and color-fixing temperature is 70-80℃, and the complexation and color-fixing time is 20-30min; the mordant complexing agent is mainly copper sulfate, and may also contain ferrous sulfate depending on the dye.

6. The method for preparing an antibacterial nylon textile according to claim 1, characterized in that, The dyeing method is immersion dyeing, and a non-ionic penetrant is added during the dyeing process. The mass concentration of the non-ionic penetrant is 0.3%-1%.

7. The method for preparing an antibacterial nylon textile according to claim 1, characterized in that, The nylon textile is pretreated with a pretreatment solution before dyeing, followed by washing and drying; the pretreatment solution is prepared by mixing a refining agent, an alkali and a penetrant in a certain proportion.

8. An antibacterial nylon textile, characterized in that, It is prepared by the method of any one of claims 1-7 for the preparation of antibacterial nylon textiles.

9. A method for preparing an antibacterial nylon garment, characterized in that, Includes the following steps: 1) Dyeing nylon garments with bio-based dyes and / or natural dyes, wherein the bio-based dyes and the natural dyes contain antibacterial active ingredients; 2) A mordant complexing agent is used to complex and fix the dyed nylon garment, wherein the mordant complexing agent contains a copper sulfate solution with a mass concentration of 0.5%-3%; 3) After complexing and fixing, the nylon garment is post-treated to obtain antibacterial nylon garment.

10. An antibacterial nylon garment, characterized in that, It is prepared by the method for preparing antibacterial nylon garments as described in claim 9.

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