Production method of environment-friendly comfortable multifunctional knitted fabric

Abstract

The invention provides a production method of an environment-friendly comfortable multifunctional knitted fabric, and belongs to the technical field of textile fabrics. The method comprises the following steps: carrying out modification treatment on a cotton knitted fabric, dyeing the modified cotton knitted fabric, cooling and draining after dyeing, washing the dyed cotton knitted fabric to remove surface flooding and slurry, carrying out reduction washing, dipping the treated fabric in an antibacterial finishing agent, and drying to obtain the antibacterial cotton knitted fabric. After antibacterial finishing is completed, drying treatment is conducted, high-temperature setting is conducted, and the environment-friendly comfortable multifunctional knitted fabric is obtained. Compared with the traditional cotton knitted fabric, the environment-friendly comfortable multifunctional knitted fabric provided by the invention has the advantages of excellent color fastness to washing, high dye utilization rate, no influence on the mechanical strength of fibers, excellent antibacterial property and moisture absorption quick-drying property.

Description

Technical Field

[0001] The invention relates to the technical field of textile fabrics, and in particular to a method for producing an environmentally friendly, comfortable and multifunctional knitted fabric. Background Art

[0002] In the textile industry, cotton knitwear is highly sought after for its unique properties. Made from cotton fibers, knitwear uses knitting needles to bend yarns into loops and intertwine them. Cotton knitwear offers numerous advantages, including excellent elasticity, which allows it to adapt to the body's dynamic movements and provide comfortable movement. Cotton knitwear is highly hygroscopic, with cotton fibers absorbing moisture from the air, creating a soft, non-stiff feel on the skin and helping to keep it dry. Cotton knitwear also offers excellent breathability, with the loose knit structure and ample spaces between yarns facilitating air circulation and keeping the wearer cool even in hot weather. Its soft texture and comfort make it suitable for intimate apparel, such as T-shirts, underwear, sportswear, and pajamas. Cotton knitwear also exhibits excellent dyeing properties, producing a rich variety of vibrant colors, satisfying consumers' aesthetic needs.

[0003] However, cotton fibers themselves lack antibacterial properties. Human secretions like sweat and sebum provide a suitable habitat for microorganisms, making them prone to the growth of bacteria, fungi, and other microorganisms. This can lead to unpleasant odors in cotton knitted fabrics during wear and can also cause health issues such as skin allergies. Furthermore, while cotton fibers have a certain degree of hygroscopicity, moisture diffusion and evaporation within the fabric are slow, resulting in poor moisture absorption and quick-drying properties. During exercise or in hot and humid environments, clothing absorbs sweat but does not dry quickly, causing a sticky and uncomfortable feeling for the wearer, severely impacting the wearing experience.

[0004] In terms of dyeing technology, reactive dyes are widely used in cotton knitted fabric dyeing due to their advantages such as a complete color spectrum, bright colors, and high color fastness. However, the reaction between reactive dyes and cotton fibers has limitations, resulting in low dye uptake and fixation rates, typically only 50-70% and 60-70%, respectively. Furthermore, undyed and unfixed dye is discharged with dyeing wastewater, resulting in dye waste and increased production costs, as well as serious environmental pollution and increased wastewater treatment difficulties. Summary of the Invention

[0005] In view of this, the present invention provides a method for producing an environmentally friendly, comfortable and multifunctional knitted fabric, comprising the following steps:

[0006] S1. Pretreatment of cotton knitted fabric: immersing the cotton knitted fabric in the modified aqueous solution and cold-stacking at room temperature for 24-48 hours. After the cold-stacking is completed, washing and drying are performed to obtain the modified cotton knitted fabric;

[0007] S2, dyeing process: immersing the pretreated cotton knitted fabric in a container containing dye liquor at a bath ratio of 1:5-8, heating the container to 60-80° C. and maintaining the temperature for 20-50 min. After dyeing, cooling the container and draining the dye liquor to obtain the dyed cotton knitted fabric;

[0008] S3, reduction washing process: rinse the dyed cotton knitted fabric with running water for 2-5 minutes to remove surface floating color and sizing, then immerse it in a reduction washing solution at a controlled temperature of 70-90° C., a bath ratio of 1:10-13, and a treatment time of 15-35 minutes. After the treatment is completed, rinse to neutrality to obtain the treated fabric;

[0009] S4, finishing: the treated fabric is immersed in a composite antibacterial agent at a bath ratio of 1:20-50, and after the antibacterial finishing is completed, the fabric is pressed and then dried;

[0010] S5. Finished product shaping: The dried cotton knitted fabric is shaped at high temperature to obtain an environmentally friendly, comfortable and multifunctional knitted fabric.

[0011] Furthermore, the modified aqueous solution in step S1 comprises the following raw materials: 10-80 g / L of 2,3-epoxypropyltrimethylammonium chloride, 2-5 g / L of dihydroxymethyldihydroxyethylene urea, and 16.2-28.1 g / L of sodium hydroxide, with a bath ratio of 1:3-5. The drying temperature in step S1 is 80-100°C.

[0012] Furthermore, the dye solution in step S2 includes the following raw materials: 0.5-2.8 g / L of reactive dye, 3-7 g / L of sodium sulfate, 35-60 g / L of trisodium citrate, and 8-15 g / L of soda ash.

[0013] Furthermore, the heating procedure in step S2 is as follows: heating from room temperature to 50°C at a rate of 1.5-2.5°C / min, keeping warm for 5-10 minutes, then heating to 60-80°C at a rate of 0.5°C / min, keeping warm for 20-50 minutes, and after dyeing is completed, lowering the temperature to room temperature at a rate of 1-1.5°C / min and draining.

[0014] Furthermore, the reducing washing solution in step S3 comprises the following raw materials: 2-8 g / L of sodium hydroxide, 3-5 g / L of hydrosulfite, 0.3-1.2 g / L of polyoxyethylene isooctyl alcohol ether, and 0.5-1.7 g / L of lauroyl PG-trimethylammonium chloride.

[0015] Furthermore, the penetrant is penetrant JFC.

[0016] Furthermore, the composite antibacterial agent comprises the following raw materials in weight percentage: 2.3-6.8% chitosan, 2.15-8.35% itaconic acid, 0.5-1.7% tartaric acid, 0.5-1.8% hexadecyldimethylbenzyl ammonium chloride (HDBAC), and the balance is water.

[0017] Furthermore, the percentage of each raw material in the composite antibacterial agent refers to the mass percentage compared to the cotton knitted fabric.

[0018] Furthermore, the chitosan has a deacetylation degree of 80-95% and a viscosity-average molecular weight of 7.3×10 5 -9.1×10 5 g / mol.

[0019] Furthermore, the temperature of the immersion treatment in step S4 is controlled within the range of 70-85° C., and the immersion treatment time is controlled within the range of 20-150 s.

[0020] Furthermore, the drying temperature in step S4 is 80-110°C.

[0021] Furthermore, the rolling in step S4 is double dipping and double rolling, and the rolling rate is 75-90%.

[0022] Furthermore, in step S5, the setting temperature is 150-180° C., the setting time is 2-3 minutes, and the vehicle speed is 10-25 m / min.

[0023] The present invention also provides an environmentally friendly, comfortable and multifunctional knitted fabric obtained according to the method.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The present invention adopts 2,3-epoxypropyltrimethylammonium chloride and dihydroxymethyldihydroxyethylene urea to modify cotton knitted fabric under alkaline conditions, which can significantly improve the dyeing rate and washing fastness of the cotton knitted fabric.

[0026] The dye liquor used in the present invention comprises a reactive dye, a small amount of sodium sulfate, trisodium citrate, soda ash, ethanol and water. The present invention reduces water consumption and inorganic salt usage while effectively avoiding dye hydrolysis loss, thereby improving dye utilization and color fixation rate through reasonable design of dye liquor raw materials.

[0027] The invention adds isooctyl polyoxyethylene ether and lauroyl PG-trimethylammonium chloride during the reduction washing process, thereby synergistically improving the moisture absorption and moisture conduction performance of the cotton knitted fabric and the evaporation rate of water.

[0028] The composite antimicrobial agent used in this invention forms a network-like cross-linked structure with cotton knitted fabric, imparting excellent antimicrobial properties to the fabric. It also enhances the strength of cotton fibers, preventing mechanical damage caused by modification. The addition of hexadecyldimethylbenzylammonium chloride (HDBAC) enhances the softness and antimicrobial properties of cotton knitted fabrics. DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention are described clearly and completely below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0030] Unless otherwise specified, the experimental methods or test methods described in the following examples are all conventional methods; the raw materials and auxiliary agents, unless otherwise specified, are all obtained from conventional commercial channels or prepared by conventional methods.

[0031] The deacetylation degree of chitosan is 85% and the viscosity average molecular weight is 8.6×10 5 g / mol.

[0032] Test method for water diffusion time: GB / T21655.1-2008 "Evaluation of moisture absorption and quick-drying properties Part 1: Single combination test method".

[0033] Evaporation rate test method: GB / T21655.1-2008 "Evaluation of moisture absorption and quick-drying properties Part 1: Single combination test method".

[0034] Wrinkle resistance test method: The test is carried out according to GB / T 3819-1997 "Determination of crease recovery of textile fabrics - Recovery angle method". The sum of the warp and weft crease recovery angles is used to express the wrinkle resistance of the fabric.

[0035] Tensile breaking strength test method: GB / T 3923.1-1997 standard is used to test the tensile breaking strength of cotton fabrics.

[0036] Example 1

[0037] A method for producing an environmentally friendly, comfortable and multifunctional knitted fabric, comprising the following specific steps:

[0038] S1. Pretreatment of cotton knitted fabric: immerse the cotton knitted fabric in a modified aqueous solution at a bath ratio of 1:3 and cold-batch at room temperature for 24 hours to allow the modified aqueous solution to fully react with the cotton fibers. After the reaction is complete, wash the fabric thoroughly with water and dry it in a dryer at 80° C. to obtain the modified cotton knitted fabric.

[0039] The modified aqueous solution has a formula of: 10 g / L 2,3-epoxypropyltrimethylammonium chloride, 2 g / L dihydroxymethyldihydroxyethylene urea, and 16.2 g / L sodium hydroxide;

[0040] S2. Dyeing process: immersing the pretreated cotton knitted fabric in a container containing dye liquor at a bath ratio of 1:5, heating the container from room temperature to 50° C. at a rate of 1.5° C. / min, holding the temperature for 5 min, then heating the container to 60° C. at a rate of 0.5° C. / min and holding the temperature for 20 min. After dyeing, cooling the container to room temperature at a rate of 1° C. / min, draining the container, and obtaining the dyed cotton knitted fabric;

[0041] The formula for preparing 1000 ml of the dye solution is: CI Reactive Yellow 1450.5g / L, glauber salt 3g / L, trisodium citrate 35g / L, soda ash 8g / L, and the balance is 75% ethanol aqueous solution. The dye solution is prepared by mixing CI Reactive Yellow 145, glauber salt, trisodium citrate, soda ash and ethanol aqueous solution in the above proportions to prepare the dye solution;

[0042] S3, reduction washing process: The dyed cotton knitted fabric is rinsed with running water for 2 minutes to remove surface floating color and sizing, and then immersed in a reduction washing solution at a controlled temperature of 70° C., a bath ratio of 1:10, and a treatment time of 15 minutes. After the treatment is completed, the fabric is rinsed to a neutral state to obtain a treated fabric;

[0043] The formula of the reducing washing solution includes: 2 g / L sodium hydroxide, 3 g / L sodium hydrosulfite, 0.3 g / L isooctyl alcohol polyoxyethylene ether JFC-6, and 0.5 g / L lauroyl PG-trimethyl ammonium chloride. The reducing washing solution is prepared by mixing water, sodium hydroxide, sodium hydrosulfite, isooctyl alcohol polyoxyethylene ether JFC-6, and lauroyl PG-trimethyl ammonium chloride according to the above ratio to prepare the reducing washing solution;

[0044] S4, finishing: the treated fabric is immersed in a composite antibacterial agent at a temperature of 70°C, a dipping time of 20 seconds, a bath ratio of 1:20, and after the antibacterial finishing, a second dip and a second padding is performed, with a padding rate of 75%, and then the fabric is transferred to a dryer and dried at 80°C;

[0045] The composite antimicrobial agent comprises: 2.3% chitosan, 2.15% itaconic acid, 0.5% tartaric acid, 0.5% hexadecyldimethylbenzyl ammonium chloride (HDBAC), and the balance water; and the composite antimicrobial agent is prepared by mixing water, chitosan, itaconic acid, tartaric acid, and hexadecyldimethylbenzyl ammonium chloride (HDBAC) according to the above proportions to prepare the composite antimicrobial agent.

[0046] S5. Finished product shaping: The dried cotton knitted fabric is shaped at high temperature, with the shaping temperature being 150° C., the shaping time being 2 minutes, and the speed being 10 m / min, to obtain an environmentally friendly, comfortable and multifunctional knitted fabric.

[0047] Example 2

[0048] A method for producing an environmentally friendly, comfortable and multifunctional knitted fabric, comprising the following specific steps:

[0049] S1. Pretreatment of cotton knitted fabric: immerse the cotton knitted fabric in the modified aqueous solution at a bath ratio of 1:4 and cold-batch at room temperature for 28 hours to allow the modified aqueous solution to fully react with the cotton fibers. After the reaction is complete, wash the fabric thoroughly with water and dry it in a dryer at 85° C. to obtain the modified cotton knitted fabric.

[0050] The formula of the modified aqueous solution is: 30 g / L of 2,3-epoxypropyltrimethylammonium chloride, 3 g / L of dihydroxymethyldihydroxyethylene urea, and 19.1 g / L of sodium hydroxide;

[0051] S2. Dyeing process: immersing the pretreated cotton knitted fabric in a container containing dye liquor at a bath ratio of 1:6, heating the container from room temperature to 50° C. at a rate of 1.5° C. / min, holding the temperature for 6 min, then heating the container to 65° C. at a rate of 0.5° C. / min and holding the temperature for 23 min. After dyeing, cooling the container to room temperature at a rate of 1° C. / min, draining the container, and obtaining the dyed cotton knitted fabric;

[0052] The formula for preparing 1000 ml of the dye solution is: CI Reactive Blue 1941.1g / L, 4g / L sodium sulfate, 38g / L trisodium citrate, and 9g / L soda ash. The dye solution is prepared by mixing CI Reactive Blue 194, sodium sulfate, trisodium citrate, soda ash, and 75% ethanol aqueous solution in the above proportions to prepare the dye solution.

[0053] S3, reduction washing process: the dyed cotton knitted fabric is rinsed with running water for 3 minutes to remove surface floating color and sizing, and then immersed in a reduction washing solution at a controlled temperature of 75° C., a bath ratio of 1:11, and a treatment time of 20 minutes. After the treatment is completed, the fabric is rinsed to a neutral state to obtain a treated fabric;

[0054] The formula of the reducing washing solution includes: 3 g / L sodium hydroxide, 3 g / L sodium hydrosulfite, 0.5 g / L isooctyl alcohol polyoxyethylene ether JFC-6, and 0.8 g / L lauroyl PG-trimethyl ammonium chloride. The reducing washing solution is prepared by mixing water, sodium hydroxide, sodium hydrosulfite, isooctyl alcohol polyoxyethylene ether JFC-6, and lauroyl PG-trimethyl ammonium chloride according to the above ratio to prepare the reducing washing solution;

[0055] S4, finishing: the treated fabric is immersed in a composite antibacterial agent at a temperature of 75°C, a immersion time of 50 seconds, a bath ratio of 1:30, and after the antibacterial finishing, a second dip and a second padding is performed, with a padding rate of 80%, and then the fabric is transferred to a dryer and dried at 90°C;

[0056] The composite antimicrobial agent comprises: 3.5% chitosan, 3.18% itaconic acid, 0.8% tartaric acid, 0.5% hexadecyldimethylbenzyl ammonium chloride (HDBAC), and the balance water; and the composite antimicrobial agent is prepared by mixing chitosan, itaconic acid, tartaric acid, hexadecyldimethylbenzyl ammonium chloride (HDBAC), and water according to the above proportions to prepare the composite antimicrobial agent.

[0057] S5. Finished product shaping: The dried cotton knitted fabric is shaped at high temperature, with the shaping temperature being 155° C., the shaping time being 2 minutes, and the speed being 18 m / min, to obtain an environmentally friendly, comfortable and multifunctional knitted fabric.

[0058] Example 3

[0059] A method for producing an environmentally friendly, comfortable and multifunctional knitted fabric, comprising the following specific steps:

[0060] S1. Pretreatment of cotton knitted fabric: immerse the cotton knitted fabric in the modified aqueous solution at a bath ratio of 1:4 and cold-batch at room temperature for 36 hours to allow the modified aqueous solution to fully react with the cotton fibers. After the reaction is complete, wash the fabric thoroughly with water and dry it in a dryer at 95° C. to obtain the modified cotton knitted fabric.

[0061] The formula of the modified aqueous solution is: 60 g / L of 2,3-epoxypropyltrimethylammonium chloride, 3 g / L of dihydroxymethyldihydroxyethylene urea, and 20.3 g / L of sodium hydroxide;

[0062] S2. Dyeing process: immersing the pretreated cotton knitted fabric in a container containing dye liquor at a bath ratio of 1:7, heating the container from room temperature to 50° C. at a rate of 2.5° C. / min, holding the temperature for 10 min, then heating the container to 80° C. at a rate of 0.5° C. / min and holding the temperature for 40 min. After dyeing, cooling the container to room temperature at a rate of 1.5° C. / min, draining the container, and obtaining the dyed cotton knitted fabric;

[0063] The formula for preparing 1000 ml of the dye solution is: 51.6 g / L of CI Reactive Black, 4.5 g / L of sodium sulfate, 48 g / L of trisodium citrate, 12 g / L of soda ash, and the balance is 75% ethanol aqueous solution. The preparation method of the dye solution is: CI Reactive Black 5, sodium sulfate, trisodium citrate, soda ash and 75% ethanol aqueous solution are mixed according to the above ratio to prepare the dye solution;

[0064] S3, reduction washing process: the dyed cotton knitted fabric was rinsed with running water for 5 minutes to remove surface floating color and sizing, and then immersed in a reduction washing solution at a controlled temperature of 90° C., a bath ratio of 1:13, and a treatment time of 35 minutes. After the treatment, the fabric was rinsed to a neutral state to obtain a treated fabric;

[0065] The formula of the reducing washing solution includes: 8 g / L sodium hydroxide, 4 g / L sodium hydrosulfite, 1.0 g / L isooctyl alcohol polyoxyethylene ether JFC-6, and 1.5 g / L lauroyl PG-trimethyl ammonium chloride. The reducing washing solution is prepared by mixing water, sodium hydroxide, sodium hydrosulfite, isooctyl alcohol polyoxyethylene ether JFC-6, and lauroyl PG-trimethyl ammonium chloride according to the above ratio to prepare the reducing washing solution;

[0066] S4, finishing: the treated fabric is immersed in a composite antibacterial agent at a temperature of 75°C, a dipping time of 90 seconds, a bath ratio of 1:45, and after the antibacterial finishing, a second dip and a second padding is performed, with a padding rate of 90%, and then the fabric is transferred to a dryer and dried at 110°C;

[0067] The composite antimicrobial agent comprises: 5.5% chitosan, 6.7% itaconic acid, 1.2% tartaric acid, 1.3% hexadecyldimethylbenzyl ammonium chloride (HDBAC), and the balance water; and the composite antimicrobial agent is prepared by mixing water, chitosan, itaconic acid, tartaric acid, and hexadecyldimethylbenzyl ammonium chloride (HDBAC) according to the aforementioned proportions to prepare the composite antimicrobial agent.

[0068] S5. Finished product shaping: The dried cotton knitted fabric is shaped at high temperature, with the shaping temperature being 170° C., the shaping time being 3 minutes, and the speed being 25 m / min, to obtain an environmentally friendly, comfortable and multifunctional knitted fabric.

[0069] Example 4

[0070] A method for producing an environmentally friendly, comfortable and multifunctional knitted fabric, comprising the following specific steps:

[0071] S1. Pretreatment of cotton knitted fabric: immerse the cotton knitted fabric in the modified aqueous solution at a bath ratio of 1:5 and cold-batch at room temperature for 40 hours to allow the modified aqueous solution to fully react with the cotton fibers. After the reaction is complete, wash the fabric thoroughly with water and dry it in a dryer at 100° C. to obtain the modified cotton knitted fabric.

[0072] The formula of the modified aqueous solution is: 75 g / L of 2,3-epoxypropyltrimethylammonium chloride, 5 g / L of dihydroxymethyldihydroxyethylene urea, and 25.9 g / L of sodium hydroxide;

[0073] S2. Dyeing process: immersing the pretreated cotton knitted fabric in a container containing dye liquor at a bath ratio of 1:7, heating the container from room temperature to 50° C. at a rate of 2.5° C. / min, holding the temperature for 8 min, then heating the container to 70° C. at a rate of 0.5° C. / min and holding the temperature for 40 min. After dyeing, cooling the container to room temperature at a rate of 1.5° C. / min, draining the container, and obtaining the dyed cotton knitted fabric;

[0074] The formula for preparing 1000 ml of the dye solution is: CI Reactive Orange 722.8g / L, glauber salt 6g / L, trisodium citrate 58g / L, soda ash 14g / L, and the balance is 75% ethanol aqueous solution. The dye solution is prepared by mixing CI Reactive Orange 72, glauber salt, trisodium citrate, soda ash, and 75% ethanol aqueous solution in the above proportions to prepare the dye solution;

[0075] S3, reduction washing process: The dyed cotton knitted fabric was rinsed with running water for 5 minutes to remove surface floating color and sizing, and then immersed in a reduction washing solution at a controlled temperature of 90° C., a bath ratio of 1:12, and a treatment time of 33 minutes. After the treatment, the fabric was rinsed to a neutral state to obtain a treated fabric;

[0076] The formula of the reducing washing solution includes: 8 g / L sodium hydroxide, 5 g / L sodium hydrosulfite, 1.1 g / L isooctyl alcohol polyoxyethylene ether JFC-6, and 1.5 g / L lauroyl PG-trimethyl ammonium chloride. The reducing washing solution is prepared by mixing water, sodium hydroxide, sodium hydrosulfite, isooctyl alcohol polyoxyethylene ether JFC-6, and lauroyl PG-trimethyl ammonium chloride according to the above ratio to prepare the reducing washing solution;

[0077] S4, finishing: the treated fabric is immersed in a composite antibacterial agent at an immersion temperature of 85°C, an immersion treatment time of 140 seconds, a bath ratio of 1:48, and after the antibacterial finishing is completed, a second immersion and a second padding are performed, with a padding rate of 88%, and then the fabric is transferred to a dryer and dried at 100°C;

[0078] The composite antimicrobial agent comprises: 6.5% chitosan, 8.05% itaconic acid, 1.2% tartaric acid, 1.5% hexadecyldimethylbenzyl ammonium chloride (HDBAC), and the balance water; and a preparation method for the composite antimicrobial agent comprises: mixing chitosan, itaconic acid, tartaric acid, hexadecyldimethylbenzyl ammonium chloride (HDBAC), and water according to the aforementioned proportions to prepare the composite antimicrobial agent.

[0079] S5. Finished product shaping: The dried cotton knitted fabric is shaped at high temperature, with the shaping temperature being 180° C., the shaping time being 3 minutes, and the speed being 22 m / min, to obtain an environmentally friendly, comfortable and multifunctional knitted fabric.

[0080] Example 5

[0081] A method for producing an environmentally friendly, comfortable and multifunctional knitted fabric, comprising the following specific steps:

[0082] S1. Pretreatment of cotton knitted fabric: immerse the cotton knitted fabric in the modified aqueous solution at a bath ratio of 1:5 and cold-batch at room temperature for 48 hours to allow the modified aqueous solution to fully react with the cotton fibers. After the reaction is complete, wash the fabric thoroughly with water and dry it in a dryer at 100° C. to obtain the modified cotton knitted fabric.

[0083] The formula of the modified aqueous solution is: 80 g / L of 2,3-epoxypropyltrimethylammonium chloride, 5 g / L of dihydroxymethyldihydroxyethylene urea, and 28.1 g / L of sodium hydroxide;

[0084] S2, dyeing process: immersing the pretreated cotton knitted fabric in a container containing dye liquor at a bath ratio of 1:8, heating the container from room temperature to 50°C at a rate of 2.5°C / min, holding the temperature for 10 min, then heating the container to 80°C at a rate of 0.5°C / min and holding the temperature for 50 min. After dyeing, cooling the container to room temperature at a rate of 1.5°C / min, draining the container, and obtaining the dyed cotton knitted fabric;

[0085] The formula for preparing 1000 ml of the dye solution is: CI Reactive Red 1952.8g / L, glauber salt 7g / L, trisodium citrate 60g / L, soda ash 15g / L, and the balance is 75% ethanol aqueous solution. The dye solution is prepared by mixing CI Reactive Red 195, glauber salt, trisodium citrate, and soda ash in the above ratio with 75% ethanol aqueous solution to prepare the dye solution;

[0086] S3, reduction washing process: the dyed cotton knitted fabric was rinsed with running water for 5 minutes to remove surface floating color and sizing, and then immersed in a reduction washing solution at a controlled temperature of 90° C., a bath ratio of 1:13, and a treatment time of 35 minutes. After the treatment, the fabric was rinsed to a neutral state to obtain a treated fabric;

[0087] The formula of the reducing washing solution includes: 8 g / L sodium hydroxide, 5 g / L sodium hydrosulfite, 1.2 g / L isooctyl alcohol polyoxyethylene ether JFC-6, and 1.7 g / L lauroyl PG-trimethyl ammonium chloride. The reducing washing solution is prepared by mixing sodium hydroxide, sodium hydrosulfite, isooctyl alcohol polyoxyethylene ether JFC-6, lauroyl PG-trimethyl ammonium chloride, and water in the above proportions to prepare the reducing washing solution;

[0088] S4, finishing: the treated fabric is immersed in a composite antibacterial agent at an immersion temperature of 85°C, an immersion treatment time of 150s, a bath ratio of 1:50, and after the antibacterial finishing, a second immersion and a second padding are performed, with a padding rate of 90%, and then the fabric is transferred to a dryer and dried at 110°C;

[0089] The composite antimicrobial agent comprises: 6.8% chitosan, 8.35% itaconic acid, 1.7% tartaric acid, 1.8% hexadecyldimethylbenzyl ammonium chloride (HDBAC), and the balance water; and the composite antimicrobial agent is prepared by mixing chitosan, itaconic acid, tartaric acid, hexadecyldimethylbenzyl ammonium chloride (HDBAC), and water according to the aforementioned proportions to prepare the composite antimicrobial agent.

[0090] S5. Finished product shaping: The dried cotton knitted fabric is shaped at high temperature, with the shaping temperature being 180° C., the shaping time being 3 minutes, and the speed being 25 m / min, to obtain an environmentally friendly, comfortable and multifunctional knitted fabric.

[0091] Comparative Example 1

[0092] The difference from Example 1 is:

[0093] (1) The cotton knitted fabric has not been modified;

[0094] (2) No 2,3-epoxypropyltrimethylammonium chloride was added to the modified aqueous solution;

[0095] (3) No dihydroxymethyl dihydroxyethylene urea was added to the modified aqueous solution.

[0096] Comparative Example 2

[0097] The difference from Example 1 is that the dye liquor does not contain ethanol.

[0098] The dye uptake and fixation rates of the knitted fabrics prepared in Examples 1-5 and Comparative Examples 1-2 were tested, and the results are shown in Table 1:

[0099] Table 1

[0100]

[0101] As shown in Table 1, compared to Comparative Examples 1-2, Examples 1-5 of the present invention significantly improved dye uptake and fixation rates after modification of cotton knitted fabrics. Furthermore, during the study, it was found that while dimethyloldihydroxyethylene urea had little effect on dye uptake and fixation rates, the mechanical properties of the cotton knitted fabric decreased after removing dimethyloldihydroxyethylene urea, demonstrating that dimethyloldihydroxyethylene urea has a positive effect on improving the mechanical properties of cotton knitted fabrics.

[0102] Comparative Example 3

[0103] The difference from Example 1 is:

[0104] (1) The reducing washing solution does not contain isooctyl alcohol polyoxyethylene ether JFC-6;

[0105] (2) The reducing washing solution does not contain lauroyl PG-trimethylammonium chloride.

[0106] The water diffusion time and evaporation rate of the knitted fabrics prepared in Examples 1-5 and Comparative Example 3 were tested, and the results are shown in Table 2:

[0107] Table 2

[0108]

[0109] As shown in Table 2, isooctyl polyoxyethylene ether JFC-6 and lauroyl PG-trimethylammonium chloride have a positive effect on improving the moisture absorption and quick-drying properties of cotton knitted fabrics.

[0110] Comparative Example 4

[0111] The difference from Example 1 is:

[0112] (1) The composite antimicrobial agent does not contain itaconic acid;

[0113] (2) The composite antimicrobial agent does not contain tartaric acid;

[0114] (3) The composite antibacterial agent does not contain hexadecyldimethylbenzyl ammonium chloride.

[0115] The antibacterial and anti-wrinkle properties of the knitted fabrics prepared in Examples 1-5 and Comparative Example 4 were tested. The results are shown in Table 3:

[0116] Table 3

[0117]

[0118] As can be seen from Table 3, the cotton knitted fabrics prepared in Examples 1-5 of the present invention have excellent antibacterial properties. After 300 conventional washes, the antibacterial properties against Staphylococcus aureus and Escherichia coli are still maintained at more than 65%, indicating that the composite antibacterial agent used in the present invention can effectively improve the washability of cotton knitted fabrics and overcome the defect that the antibacterial properties of cotton knitted fabrics decrease with the increase in the number of washes.

[0119] In addition, Table 3 shows that deleting itaconic acid or tartaric acid from the composite antibacterial agent has little effect on the antibacterial properties of the fabric, but reduces the mechanical strength and wrinkle resistance of the cotton knitted fabric. In addition, Table 3 shows that adding hexadecyldimethylbenzyl ammonium chloride to the composite antibacterial agent helps to enhance the antibacterial properties of the cotton knitted fabric.

[0120] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A method for producing an environmentally friendly, comfortable and multifunctional knitted fabric, characterized in that: The following steps are involved: S1. Pretreatment of cotton knitted fabric: immersing the cotton knitted fabric in the modified aqueous solution and cold-stacking at room temperature for 24-48 hours. After the cold-stacking is completed, washing and drying are performed to obtain the modified cotton knitted fabric; S2, dyeing process: immersing the pretreated cotton knitted fabric in a container containing dye liquor at a bath ratio of 1:5-8, heating the container to 60-80° C. and maintaining the temperature for 20-50 min. After dyeing, cooling the container and draining the dye liquor to obtain the dyed cotton knitted fabric; S3, reduction washing process: rinse the dyed cotton knitted fabric with running water for 2-5 minutes to remove surface floating color and sizing, then immerse it in a reduction washing solution at a controlled temperature of 70-90° C., a bath ratio of 1:10-13, and a treatment time of 15-35 minutes. After the treatment is completed, rinse to neutrality to obtain the treated fabric; S4, finishing: the treated fabric is immersed in a composite antibacterial agent at a bath ratio of 1:20-50, and after the antibacterial finishing is completed, the fabric is pressed and then dried; S5. Finished product shaping: The dried cotton knitted fabric is shaped at high temperature to obtain an environmentally friendly, comfortable and multifunctional knitted fabric.

2. The method for producing the environmentally friendly, comfortable and multifunctional knitted fabric according to claim 1, characterized in that: The modified aqueous solution in step S1 includes the following raw materials: 10-80 g / L of 2,3-epoxypropyltrimethylammonium chloride, 2-5 g / L of dihydroxymethyldihydroxyethylene urea, and 16.2-28.1 g / L of sodium hydroxide, with a bath ratio of 1:3-5. The drying temperature in step S1 is 80-100°C.

3. The method for producing the environmentally friendly, comfortable and multifunctional knitted fabric according to claim 1, characterized in that: The dye solution in step S2 includes the following raw materials: 0.5-2.8 g / L of reactive dye, 3-7 g / L of sodium sulfate, 35-60 g / L of trisodium citrate, and 8-15 g / L of soda ash.

4. The method for producing the environmentally friendly, comfortable and multifunctional knitted fabric according to claim 1, characterized in that: The heating procedure in step S2 is as follows: heating from room temperature to 50°C at a rate of 1.5-2.5°C / min, keeping warm for 5-10 minutes, then heating to 60-80°C at a rate of 0.5°C / min, keeping warm for 20-50 minutes, and after dyeing is completed, lowering the temperature to room temperature at a rate of 1-1.5°C / min and draining.

5. The method for producing the environmentally friendly, comfortable and multifunctional knitted fabric according to claim 1, characterized in that: The reducing washing solution in step S3 comprises the following raw materials: 2-8 g / L of sodium hydroxide, 3-5 g / L of hydrosulfite, 0.3-1.2 g / L of polyoxyethylene isooctyl alcohol ether, and 0.5-1.7 g / L of lauroyl PG-trimethylammonium chloride.

6. The method for producing the environmentally friendly, comfortable and multifunctional knitted fabric according to claim 1, characterized in that: The composite antibacterial agent comprises the following raw materials in weight percentage: 2.3-6.8% of chitosan, 2.15-8.35% of itaconic acid, 0.5-1.7% of tartaric acid, 0.5-1.8% of hexadecyldimethylbenzyl ammonium chloride, and the balance is water.

7. The method for producing the environmentally friendly, comfortable and multifunctional knitted fabric according to claim 1, characterized in that: The temperature of the immersion treatment in step S4 is controlled within the range of 70-85° C., and the time of the immersion treatment is controlled within the range of 20-150 s.

8. The method for producing the environmentally friendly, comfortable and multifunctional knitted fabric according to claim 1, characterized in that: The drying temperature in step S4 is 80-110°C.

9. The method for producing the environmentally friendly, comfortable and multifunctional knitted fabric according to claim 1, characterized in that: The setting temperature in step S5 is 150-180° C., the setting time is 2-3 minutes, and the vehicle speed is 10-25 m / min.

10. The environmentally friendly, comfortable and multifunctional knitted fabric obtained according to the method according to any one of claims 1 to 9.

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