Antibacterial deodorizing dyeing and finishing process of knitted nylon-spandex fabric and knitted nylon-spandex fabric

Abstract

The antibacterial and deodorizing dyeing and finishing process comprises the following steps: S1, dyeing: feeding cloth at normal temperature, carrying out dyeing treatment, soaping after dyeing is completed, then carrying out color fixation treatment, and washing with cold water to complete dyeing; s2, drying: adding citric acid into a trough to adjust the pH value of the cloth cover to be 5-6, and drying the dyed brocade and spandex blended fabric; s3, solution preparation: diluting a mixed solution of 5-15 g / L of an antibacterial agent AGP and 80-120 g / L of a deodorant DEO, filtering the mixed solution through a screen to remove suspended impurities, filtering the filtered mixed solution, and adding the filtered mixed solution into a trough; and S4, shaping: shaping the finished product of the fabric by adopting a shaping padding method. According to the invention, the fabric can have double deodorization functions of antibacterial deodorization and physical deodorization at the same time.

Description

Technical Field

[0001] The invention relates to the technical field of fabric dyeing and finishing, in particular to an antibacterial and deodorizing dyeing and finishing process for a knitted nylon-spandex fabric and the knitted nylon-spandex fabric. Background Art

[0002] In daily life, the environment and human body may have various odors, which make people feel uncomfortable and unhappy. Especially after the human body sweats, the odor produced by sweat staining textiles and decomposing on the textiles is difficult to eliminate. This includes the odor caused by long-term bacterial growth and the smell of sweat.

[0003] The sources of odor are as shown in Table 1, citing the national standard GB / T 33610-2019:

[0004] Table (1) Odor source components

[0005]

[0006] From the table we can see that the main odor components of human sweat are ammonia, acetic acid and isovaleric acid. Although 99% of human sweat is water and has no smell itself, the glycerol fatty acid esters in sweat are prone to produce ammonia, acetic acid and isovaleric acid after biological decomposition. Therefore, the main odors eliminated by deodorizing close-fitting textiles are mainly these three chemical components.

[0007] At present, deodorization technologies mainly use sensory deodorization, chemical deodorization, physical deodorization, biological deodorization, and antibacterial deodorization. Sensory deodorization is to replace the odor with other strong odor gases with a masking effect, such as perfume, aromatherapy, etc. Chemical deodorization is to decompose the chemical components of the odor through redox reactions, addition / condensation reactions; neutralization reactions / ion exchange reactions neutralize and remove acidic and alkaline odors. Physical deodorization mainly uses porous materials to adsorb the chemical components that produce odor, reduce the concentration of odorous substances in the environment, and achieve the deodorization effect. Biological deodorization mainly uses biological enzymes to decompose organic odorous substances. Antibacterial deodorization uses antibacterial agents to reduce the odor caused by bacterial activity and reproduction.

[0008] Most deodorizing underwear fabrics on the market are finished with antibacterial fibers / antibacterial additives to reduce odors caused by bacterial growth. However, they have little deodorizing effect on the acetic acid and ammonia odors produced by the decomposition of sweat, and their deodorizing effect is limited. Summary of the Invention

[0009] The purpose of the present invention is to provide an antibacterial and deodorizing dyeing and finishing process for knitted nylon-spandex fabrics and the knitted nylon-spandex fabrics. The present invention can enable the fabrics to have dual deodorizing functions of antibacterial and deodorizing and physical deodorizing.

[0010] To achieve the above object, the present invention provides the following technical solution: an antibacterial and deodorizing dyeing and finishing process for knitted nylon-spandex fabrics, the dyeing and finishing process comprising:

[0011] S1. Dyeing: First put the cloth in at room temperature and dye it. After dyeing, wash it with soap, then fix the color, and then wash it with cold water to complete the dyeing.

[0012] S2. Drying: Add citric acid into the trough to adjust the pH value of the fabric to 5-6, and dry the dyed nylon-spandex blended fabric;

[0013] S3. Solution preparation: dilute a mixed solution of 5-15 g / L antibacterial agent AGP and 80-120 g / L deodorant DEO, filter through a mesh to remove suspended impurities, and add the filtered mixed solution to the feed tank;

[0014] S4. Shaping: Use the shaping padding method to shape the fabric into finished product.

[0015] Furthermore, the step S1, dyeing is further performed as follows: adding the cloth at room temperature, with a bath ratio of 1:12, and running at room temperature for 5 to 10 minutes after adding the cloth. After the dyed cloth is fully soaked and swollen, an acid leveling agent, an acid dye, and glacial acetic acid are added, the temperature is raised to 98° C., and the temperature is kept for 30 minutes for dyeing. After dyeing, the method is washed once, soaping agent and soda ash are added at room temperature, soaping at 50° C. for 20 minutes, and then washing with water, a fixing agent and glacial acetic acid are added to fix the color at 70° C. for 20 minutes, and then washed with cold water.

[0016] Furthermore, the concentrations of the acid leveling agent, glacial acetic acid, and soaping agent are all 0.3-0.7 g / L, the amount of the acid dye is 3%-7%, the concentration of the soda ash is 0.1-0.5 g / L, and the amount of the fixing agent is 3%-7%.

[0017] Furthermore, the step S2, drying, is further performed as follows: adding 0.3-1 g / L of citric acid, dipping and rolling, with a liquid rate of 50%, and drying the rolled fabric at a temperature of 150° C. for 80 seconds.

[0018] Furthermore, the process of shaping the finished product is to adopt a temperature of 170° C., a shaping time of 80 seconds, and a liquid carrying rate of 50% to shape the finished product.

[0019] Furthermore, the antibacterial agent AGP is a silver ion antibacterial agent AGP, and the deodorant DEO is an anion-containing inorganic mineral salt additive DEO.

[0020] Furthermore, the filtration is performed using a nylon mesh, and the mesh number of the mesh is 600 to 1000.

[0021] Furthermore, the antibacterial agent AGP is preferably used at a concentration of 10 g / L, and the deodorant DEO is preferably used at a concentration of 100 g / L.

[0022] Furthermore, the citric acid is preferably used at a concentration of 0.5 g / L.

[0023] The beneficial effects of the present invention are as follows: the present invention uses two antibacterial and deodorizing agents with similar alkaline stabilization systems in the same bath, which reduces the process and energy consumption in terms of cost, and achieves the dual deodorizing effect of destroying the odor produced by bacterial reproduction from a biological perspective and absorbing the odor in the environment from a physical perspective. DETAILED DESCRIPTION

[0024] The present invention will be further described below.

[0025] The present invention provides an embodiment: an antibacterial and deodorizing dyeing and finishing process for knitted nylon-spandex fabrics, the dyeing and finishing process comprising:

[0026] S1. Dyeing: First put the cloth in at room temperature and dye it. After dyeing, wash it with soap, then fix the color, and then wash it with cold water to complete the dyeing.

[0027] S2. Drying: Add citric acid into the trough to adjust the pH value of the fabric to 5-6, and dry the dyed nylon-spandex blended fabric;

[0028] S3. Solution preparation: dilute a mixed solution of 5-15 g / L antibacterial agent AGP and 80-120 g / L deodorant DEO, filter through a mesh to remove suspended impurities, and add the filtered mixed solution to the feed tank;

[0029] S4. Shaping: Use the shaping padding method to shape the fabric into finished product.

[0030] This application uses a silver ion antibacterial agent AGP with antibacterial effect and an anion-containing inorganic mineral salt auxiliary agent DEO to mix and use them in the same process and bath, reducing the tediousness of adding auxiliary agents separately and achieving a better and more comprehensive deodorizing effect. The antibacterial principle of the antibacterial agent AGP is to combine silver ions with inorganic salts and then dissolve them in a stable alkaline stabilizing system. They are attached to the fabric by a fixed immersion and padding method. The silver ions are slowly released during daily wear, destroying the activity and reproduction of bacteria in the environment, and eliminating the odor caused by bacterial breeding from a biological perspective to achieve a deodorizing effect. The deodorizing principle of the deodorizing agent DEO is to decompose the inorganic mineral salt in a stable alkaline solution, attach it to the fabric surface by a fixed immersion and padding method, and then reduce the odor content in the environment through the adsorption of acetic acid and ammonia by the inorganic mineral salt. From a physical perspective, it directly reduces the odor concentration to achieve a deodorizing effect. Currently, the only underwear fabrics on the market that achieve deodorizing function are those that add antibacterial agents, indicating that there is a huge market demand for deodorizing in the field of intimate underwear. This technical solution selects knitted elastic nylon-spandex underwear fabric as the base material, which not only improves the added value of the product, but also meets market demand and achieves practical economic value.

[0031] In one embodiment of the present invention, the step S1, dyeing, further comprises: adding the cloth at room temperature, with a bath ratio of 1:12, first running at room temperature for 5 to 10 minutes after adding the cloth, adding an acid leveling agent, an acid dye, and glacial acetic acid after the dyed cloth is fully soaked and swollen, heating to 98° C., keeping warm for 30 minutes for dyeing, washing once after dyeing, adding a soaping agent and soda ash at room temperature, soaping at 50° C. for 20 minutes, then washing with water, adding a fixing agent and glacial acetic acid, fixing at 70° C. for 20 minutes, and washing with cold water.

[0032] In one embodiment of the present invention, the concentrations of the acidic leveling agent, glacial acetic acid, and soaping agent are all 0.3-0.7 g / L, the amount of the acidic dye is 3%-7%, the concentration of the soda ash is 0.1-0.5 g / L, and the amount of the fixing agent is 3%-7%. The concentrations of the acidic leveling agent, glacial acetic acid, and soaping agent are preferably 0.5 g / L, the amounts of the acidic dye and fixing agent are preferably 5%, and the concentration of the soda ash is preferably 0.3 g / L.

[0033] In one embodiment of the present invention, step S2, drying, further comprises: adding 0.3-1 g / L of citric acid, dipping and rolling, with a liquid carryover rate of 50%, and drying the rolled fabric at a temperature of 150° C. for 80 seconds. The concentration of citric acid is preferably 0.5 g / L.

[0034] In one embodiment of the present invention, the process of shaping the finished product is to adopt a temperature of 170° C., a shaping time of 80 seconds, and a liquid carrying rate of 50% to shape the finished product.

[0035] In one embodiment of the present invention, the antimicrobial agent AGP is a silver ion antimicrobial agent AGP, and the deodorant DEO is an anion-containing inorganic mineral salt additive DEO. The deodorant DEO is further an inorganic deodorant with a functionalized silica matrix and surface modified anionic groups.

[0036] In one embodiment of the present invention, the filtration is performed using a nylon mesh, and the mesh number of the mesh is 600 to 1000. The mesh number of the mesh is preferably 600. A mesh with a suitable mesh number is selected to reduce the impurities of the two additives by diluting the filtration, thereby solving the problem that the two additives are easily precipitated in the same bath. Before mixed use, due to the high concentrations of the two additives and the high inorganic salt content of DEO, it is difficult to completely dissolve them in the solution. After the solution is prepared, it needs to be filtered to remove the condensed impurities caused by the high concentration of the additives. Since the deodorant DEO selected is a small particle at the micron level, it is easy to filter out the deodorizing active ingredients by selecting a mesh with too high a mesh number, and it is easy to filter out the deodorizing active ingredients by selecting a mesh with too low a mesh number, which is not clean and can easily cause the fabric to be stained with additive spots, which will form difficult-to-remove defects after being shaped and baked at high temperature. Selecting a suitable mesh is also a key factor.

[0037] In one embodiment of the present invention, the antibacterial agent AGP is preferably used at a concentration of 10 g / L, and the deodorant DEO is preferably used at a concentration of 100 g / L.

[0038] In one embodiment of the present invention, the citric acid concentration is preferably 0.5 g / L. By adjusting the fabric pretreatment process to control the appropriate pH value of the fabric surface, the problem of high pH value on the fabric surface due to alkaline additives can be solved. For textile fabrics, it is necessary to ensure that the surface pH value of the fabric is kept as neutral or slightly acidic as possible between 4 and 7.5 to minimize the impact on human health. The two additives used in this case are both alkaline solutions. After finishing, the pH value of the fabric surface will be high. Therefore, the pH value of the fabric surface needs to be adjusted in advance to ensure that the finished fabric meets national safety standards.

[0039] The present invention uses repeated testing to verify the appropriate dosages of the antimicrobial agent AGP and the deodorant DEO. By adjusting the process to select the appropriate additive concentration, the manufacturer ensures that both antimicrobial and deodorizing effects meet national standards. The primary method used in this solution is the finished product finalization padding method. The key adjustment parameters include additive concentration and liquid pick-up rate. The liquid pick-up rate is adjusted using the formula: (fabric weight after padding - fabric weight before padding) / fabric weight before padding × 100%, with an adjustment range of 45% to 55%.

[0040] In daily life, it is mainly used in areas that are sweat-absorbent, prone to breeding bacteria and producing odor. Therefore, a highly elastic knitted nylon-spandex double-sided fabric commonly used in antibacterial underwear on the market was selected as the experimental object.

[0041] 1. Reasonable dosage of experimental antimicrobial agents

[0042] The selected fabrics were dipped into different concentrations of antimicrobial agent AGP: 5g / L, 10g / L, and 15g / L. After being treated by the above-mentioned dipping process, the test was conducted in accordance with the national standard FZ / T 73023-2006. The experimental results are shown in Table (2).

[0043] Table (2) Comparison of the effects of different concentrations of antibacterial agent AGP

[0044]

[0045] The test results show that the relatively reasonable dosage of the antibacterial agent AGP is 10g / L, which can meet the national standard of antibacterial 3A level and the requirement of 30 wash times.

[0046] 2. Reasonable dosage of experimental deodorant

[0047] The selected fabrics were dipped in different concentrations of deodorant DEO: 80g / L, 100g / L, and 120g / L. After the finalization process to compare the effect with the antibacterial agent, the fabrics were tested according to GB / T 33610.2-2017 and GB / T 33610.3-2019. The results are shown in Table (3).

[0048] Table (3) Deodorant DEO concentration effect comparison table

[0049]

[0050] The test results show that the deodorizer DEO has little effect on reducing the odor of methyl mercaptan and hydrogen sulfide, but is more effective in reducing other odors. A dosage of 100g / L can meet the national standard test requirements for ammonia odor and acetic acid odor, indicating that DEO has a good effect on reducing the odor produced by human sweat, so a concentration of 100g / L can be selected.

[0051] 3. Select the appropriate screen through experiments

[0052] The deodorant DEO used in this technical solution is micron-sized, with the main component particle size being 0.02μm. However, larger particles are inevitably mixed in during the auxiliary agent production process, and mixing with the antimicrobial agent AGP may affect its stability. The smallest particle visible to the naked eye is typically around 50μm. Referring to the national sieve mesh size comparison table, we selected nylon yarn meshes with apertures of 75μm for a 200-mesh screen, 48μm for a 300-mesh screen, 25μm for a 600-mesh screen, and 13μm for a comparative experiment.

[0053] The experiment first prepared a mixed solution of 100g / L deodorant DEO and 10g / L antibacterial agent AGP, observed whether there were suspended particles, and then filtered using the above-mentioned sieves. The state of the filtered solution was observed. After standing for 30 minutes to simulate the storage time of large-scale production, it was observed whether the solution would re-condense the suspended matter. The experimental test results are shown in Table (4) Table (4) Filtering effect of different mesh sieves

[0054]

[0055] The experimental results show that the 200-mesh filter cannot completely filter out suspended impurities. The 300-mesh filter can remove impurities at the beginning of filtration, but a small amount of impurities will re-condense after 30 minutes. The 600-mesh and 1000-mesh screens meet the requirements. In order to ensure the effect of the additive, a 600-mesh filter with a lower mesh number is selected.

[0056] 4. pH value of pre-treated fabric

[0057] The pH value of the mixed solution of the antibacterial agent AGP and the deodorant DEO selected in this technical solution is between 8 and 9. The pH value of the nylon-spandex fabric surface after dyeing with acid dyes is between 6 and 7. After antibacterial and deodorizing treatments, the pH value of the fabric surface will increase to between 7 and 8. A pH value exceeding 7.5 has an impact on human health. Therefore, the experimental pretreatment scheme is to first adjust the pH of the fabric with different concentrations of citric acid and then perform antibacterial and deodorizing finishing. The experimental scheme and results are shown in Table (5).

[0058] Table (5) Changes in pH value after pretreatment with different concentrations of citric acid

[0059]

[0060] Experimental results show that pre-adjusting the pH of the fabric with 0.5g / L or 1g / L citric acid can effectively lower the pH of the fabric after antibacterial and deodorizing treatment. Considering cost-effectiveness and the health risks of a pH below 4.5, a lower concentration of 0.5g / L citric acid was selected for this technical solution. Specific embodiment 1:

[0062] The above-mentioned object of the present invention is achieved through the following technical solutions:

[0063] Dyeing process: Taking dark color as an example, choose a knitted nylon-spandex underwear fabric for dyeing:

[0064] (1) First add the cloth at room temperature, with a bath ratio of 1:12. After adding the cloth, run it at room temperature for 5 to 10 minutes. After the cloth is fully soaked and swollen, add 0.5g / L of acid leveling agent, 5% of acid dye and 0.5g / L of glacial acetic acid. After the addition is completed, heat it to 98℃ and keep it warm for 30 minutes for dyeing. After the insulation is completed, cool it down, drain it and wash it with water.

[0065] (2) Add 0.5 g / L soaping agent and 0.3 g / L soda ash at room temperature, raise the temperature to 50°C, keep warm for 20 minutes, cool down, and wash with water.

[0066] (3) Add 5% fixing agent and 0.5g / L glacial acetic acid, raise the temperature to 70℃, and keep it warm for 20 minutes. After the insulation is completed, cool it down to room temperature, drain the dye vat solution, then add water, wash with cold water, and drain.

[0067] Drying process:

[0068] Through the setting machine, add 0.5g / L of citric acid into the trough to adjust the pH value of the fabric surface to 5-6, dip and roll once, with a liquid rate of 50%, and dry the rolled fabric at a temperature of 150℃ for 80S.

[0069] Finished product shaping process:

[0070] A mixed solution of 10 g / L AGP antibacterial agent and 100 g / L DEO deodorant filtered through a 600-mesh sieve was added into the trough through a setting machine, with a liquid rate of 50%, a setting temperature of 170°C, and baking for 80 seconds.

[0071] In this embodiment, a suitable formula is selected based on the above-mentioned test, and two antibacterial and deodorizing agents with similar alkaline stabilization systems are used in the same bath according to the formula. This reduces the process steps and energy consumption in terms of cost, and achieves a dual deodorizing effect by biologically destroying the odor generated by bacterial reproduction and physically absorbing the odor in the environment.

[0072] The above description is only a preferred embodiment of the present invention and should not be understood as limiting the present application. All equivalent changes and modifications made within the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. An antibacterial and deodorizing dyeing and finishing process for knitted nylon-spandex fabrics, characterized by: The dyeing and finishing process includes: S1. Dyeing: First put the cloth in at room temperature and dye it. After dyeing, wash it with soap, then fix the color, and then wash it with cold water to complete the dyeing. S2. Drying: Add citric acid into the trough to adjust the pH value of the fabric to 5-6, and dry the dyed nylon-spandex blended fabric; S3. Solution preparation: dilute a mixed solution of 5-15 g / L antibacterial agent AGP and 80-120 g / L deodorant DEO, filter through a mesh to remove suspended impurities, and add the filtered mixed solution to the feed tank; S4. Shaping: Use the shaping padding method to shape the fabric into finished product.

2. The antibacterial and deodorizing dyeing and finishing process for knitted nylon-spandex fabric according to claim 1, characterized in that: The step S1, dyeing further comprises: adding cloth at room temperature, with a bath ratio of 1:12, running at room temperature for 5 to 10 minutes after adding the cloth, adding an acid leveling agent, an acid dye, and glacial acetic acid after the dyed cloth is fully soaked and swollen, heating to 98° C., keeping the temperature for 30 minutes and dyeing, washing once after dyeing, adding soaping agent and soda ash at room temperature, soaping at 50° C. for 20 minutes, washing again, adding a fixing agent and glacial acetic acid, fixing at 70° C. for 20 minutes, and washing with cold water.

3. The antibacterial and deodorizing dyeing and finishing process for knitted nylon-spandex fabric according to claim 2, characterized in that: The concentrations of the acid leveling agent, glacial acetic acid and soaping agent are all 0.3-0.7 g / L, the dosage of the acid dye is 3%-7%, the concentration of the soda ash is 0.1-0.5 g / L, and the dosage of the color fixing agent is 3%-7%.

4. The antibacterial and deodorizing dyeing and finishing process for knitted nylon-spandex fabric according to claim 1, characterized in that: The step S2, drying, further comprises: adding 0.3-1 g / L of citric acid, dipping and rolling, with a liquid rate of 50%, and drying the rolled fabric at a temperature of 150° C. for 80 seconds.

5. The antibacterial and deodorizing dyeing and finishing process for knitted nylon-spandex fabric according to claim 1, characterized in that: The process parameters for shaping the finished product are as follows: a temperature of 170° C., a shaping time of 80 seconds, and a liquid carrying rate of 50%.

6. The antibacterial and deodorizing dyeing and finishing process for knitted nylon-spandex fabric according to claim 1, characterized in that: The antibacterial agent AGP is a silver ion antibacterial agent AGP, and the deodorant DEO is an anion-containing inorganic mineral salt auxiliary agent DEO.

7. The antibacterial and deodorizing dyeing and finishing process for knitted nylon-spandex fabric according to claim 1, characterized in that: The sieve is made of nylon material for filtering, and the mesh number of the sieve is 600-1000 mesh.

8. The antibacterial and deodorizing dyeing and finishing process for knitted nylon-spandex fabric according to claim 1, characterized in that: The antibacterial agent AGP is preferably used at a concentration of 10 g / L, and the deodorant DEO is preferably used at a concentration of 100 g / L.

9. The antibacterial and deodorizing dyeing and finishing process for knitted nylon-spandex fabric according to claim 4, characterized in that: The citric acid is preferably used at a concentration of 0.5 g / L.

10. A knitted nylon-spandex fabric, characterized by: The product is prepared by the antibacterial and deodorizing dyeing and finishing process according to any one of claims 1 to 9.

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