Antibacterial fabric and processing method thereof

Abstract

The present invention relates to the technical field of fabrics, and specifically discloses an antibacterial fabric and a processing method thereof, which specifically includes the following steps: weaving, cloth sorting, singeing, cold batch desizing, modification treatment, one-bath dyeing and finalizing finishing; the modification treatment adopts an open-width padding-steaming method, the pH value is 5.5-6.5, the padding temperature is 90°C-95°C, and then steaming at a temperature of 105°C-115°C. In the modification treatment of the present invention, the pH value and the padding temperature are controlled so that the oxidized sodium alginate modified hydroxymethyl melamine modifier in the modification liquid is infiltrated and attached to the nylon-cotton blended yarn through electrostatic adsorption and with the help of the penetration auxiliary effect of a non-silicon penetrant, and then reacts under high temperature and terephthalic acid catalysis to generate a modified reaction layer; in one-bath dyeing, the wet rubbing color fastness of the fabric is greatly improved by the modified reaction layer, various color fastnesses are also up to standard, and the antibacterial durability of the fabric is improved.

Description

Technical Field

[0001] The invention relates to the technical field of fabrics, and in particular to an antibacterial fabric and a processing method thereof. Background Art

[0002] Nylon-cotton fabrics have the advantages of good moisture absorption and air permeability of cotton fibers as well as good elasticity and high wear resistance of nylon. They are widely used in various types of clothing fabrics and are deeply loved by consumers. In terms of dyeing technology, the best dye for nylon is acid dyes, but under acidic conditions, reactive dyes basically do not color cotton fibers. Reactive dyes must be used under alkaline conditions to have dyeing and fixing effects. The prior art also proposes to use ANOKI NC reactive dyes to dye nylon cotton in one bath. Although a high degree of homochromaticity can be achieved, it is difficult to achieve a level 4 wet rubbing color fastness, and the antibacterial and durable performance needs to be improved. Summary of the invention

[0003] The object of the invention is to provide an antibacterial fabric and a processing method thereof, wherein the wet rubbing color fastness reaches level 4 or above and the antibacterial ability is long-lasting.

[0004] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is:

[0005] The antibacterial fabric processing method specifically includes the following steps:

[0006] S1, weaving: using nylon-cotton blended yarn as yarn weft weaving to obtain nylon-cotton grey cloth;

[0007] S2, cloth arrangement and singeing: after cloth arrangement, the cloth is singeed by gas singeing machine;

[0008] S3, cold stack desizing: cold stack combined machine is used to perform cold stack desizing on the grey cloth, the temperature is 90℃-95℃, the speed is 40m / min~50m / min, the rolling rate is 55%~65%, and after winding and wrapping, it is stacked at room temperature for 12h-18h, and then the residual slurry and reagent are washed away;

[0009] S4, modification treatment: the desized grey cloth in step S3 is modified by open-width padding-steaming, the pH value is 5.5-6.5, the padding temperature is 90°C-95°C, the vehicle speed is 20m / min-40m / min, the rolling rate is 75%-85%, and then steamed at 105°C-115°C for 20min-30min, and then alkali washed and washed with water;

[0010] S5, one-bath dyeing of nylon and cotton: put into the vat, add quaternary ammonium type pyridine formic acid reactive dye, sodium sulfate and alkali agent, first heat to 80±2℃ and keep warm for 25min-35min, then slowly heat to 98±2℃, keep warm and dye for 50min-60min, then cool down and drain, wash with water and soap in sequence, and then wash the cloth with water;

[0011] S6. Finishing: After spreading and drying, antibacterial finishing is performed to obtain antibacterial fabrics.

[0012] Preferably, the nylon-cotton grey cloth is woven into a double-sided structure using a double-sided jacquard machine, the outer layer is a plain weft stitch structure, and the inner layer is a small jacquard mesh structure.

[0013] Preferably, the blending ratio of nylon to cotton in the nylon-cotton blended yarn is 60 / 40 or 68 / 32, and the twist is 600 twists / m-900 twists / m.

[0014] Preferably, the singeing process in step S2 is as follows: singeing firepower is 20±0.5 mbar, and machine speed is 65 m / min-70 m / min.

[0015] Preferably, the desizing working solution used in step S3 comprises 1g / L-3g / L refining agent, 6g / L-8g / L hydrogen peroxide, 0.5g / L-1.5g / L degreasing agent, 0.5g / L-1.5g / L oxygen bleaching stabilizer and 2g / L-4g / L caustic soda.

[0016] Preferably, in step S5, the heating rate to 60±2°C is 1.5°C / min-2.0°C / min, and the heating rate to 980±2°C is 1°C / min-1.5°C / min.

[0017] Preferably, the antibacterial finishing liquid in step S6 contains 70g / L-80g / L chitosan antibacterial agent SA-50DS, the vehicle speed is 35m / min-40m / min, the rolling rate is 80%-100%, and the product is pre-dried at 80℃-90℃ and then baked at 110℃-120℃ for 2min-4min.

[0018] Preferably, the modified solution used in step S4 contains 40g / L-60g / L oxidized sodium alginate modified hydroxymethyl melamine, 3g / L-6g / L non-silicon penetrant FS, and the pH value is adjusted to 5.5-6.5 by p-toluenesulfonic acid;

[0019] The structural formula of the oxidized sodium alginate modified hydroxymethyl melamine is as follows:

[0020] .

[0021] The invention also provides an antibacterial fabric prepared by the processing method.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The processing method of the invention comprises desizing, modification, one-bath dyeing and antibacterial finishing. Firstly, the size on the nylon-cotton blended yarn is removed by a cold-batch desizing process to create a favorable environment for the subsequent attachment of a modifier. During the modification treatment, the pH value and the padding temperature are controlled so that the oxidized sodium alginate-modified hydroxymethyl melamine modifier in the modification liquid is infiltrated and attached to the nylon-cotton blended yarn through electrostatic adsorption and with the aid of the penetration assistance of a non-silicon penetrant. Then, the hydroxymethyl reacts with the hydroxyl group of the cotton fiber under the catalytic action of high temperature and terephthalic acid, thereby generating a modified reaction layer on the surface of the nylon-cotton blended yarn.

[0024] In one-bath dyeing, the quaternary ammonium pyridine carboxylic acid reactive dye first reacts with the hydroxyl group of the cotton fiber and the modified reaction layer of the cotton fiber under alkaline conditions and is fixed. At the same time, the amino group of the nylon reacts with the hydroxymethyl on the modified reaction layer and is firmly attached. As the dyeing time progresses and the temperature rises, the dye solution gradually turns acidic. Then, under acidic conditions, the dyeing group reacts with the hydroxymethyl on the modified reaction layer of the nylon and is fixed and insoluble. When dyeing nylon in acidic thermal insulation, the cotton fiber is also fixed at the same time, thereby greatly improving the wet rubbing color fastness of the fabric, and various color fastnesses also meet the standards.

[0025] Finally, in the antibacterial finishing, the free oxidized sodium alginate aldehyde groups on the modified reaction layer of the present invention react with the amino groups in the chitosan molecular chain to enhance the antibacterial durability of the fabric. DETAILED DESCRIPTION Example 1

[0026] This embodiment provides an antibacterial fabric, and its processing method specifically includes the following steps:

[0027] S1. Weaving: Nylon-cotton blended yarn is used as the yarn and the yarn is weft-knitted on a double-sided jacquard machine to form a double-sided nylon-cotton grey cloth. The outer layer is a weft plain needle structure, and the inner layer is a small jacquard mesh structure. The blending ratio of nylon and cotton is 68 / 32, and the twist is 800 twists / m.

[0028] S2. Fabric arrangement and singeing: After fabric arrangement, the fabric is singed by a gas singeing machine with a singeing fire of 20mbar and a machine speed of 65m / min.

[0029] S3, cold stack desizing: cold stack combined machine is used to perform cold stack desizing on the grey cloth, the temperature is 95℃, the speed is 50m / min, the rolling rate is 60%, and after winding and wrapping, it is stacked at room temperature for 12h, and then the residual slurry and reagents are washed away. The desizing working solution contains 3g / L refining agent sodium dodecyl sulfate, 8g / L hydrogen peroxide, 1.0g / L degreasing agent TF-129K, 1.0g / L oxygen bleaching stabilizer TF-122G and 3g / L caustic soda.

[0030] S4, modification treatment: the desized grey cloth in step S3 is modified by open-width padding-steaming, the modification liquid contains 50g / L oxidized sodium alginate modified hydroxymethyl melamine, 5g / L non-silicon penetrant FS (produced by Shenzhen Diwei), and the pH value is adjusted to 6 by p-toluenesulfonic acid, the padding temperature is 95°C, the vehicle speed is 35m / min, the rolling rate is 85%, and then steamed at 115°C for 30min, followed by alkali washing and water washing.

[0031] S5, one-bath dyeing of nylon and cotton: put into the vat, add 0.3% Anoky NC Ruby, 6% Anoky NC Black, 90g / L Sodium Sulfate and 2.0g / L alkali agent, first heat to 80℃ at 1.8℃ / min and keep warm for 30min, then slowly heat to 98℃ at 1℃ / min, keep warm and dye for 60min, then cool down and drain, wash with water, soap in turn, and then wash out the cloth. Anoky NC reactive dye has a quaternary ammonium type pyridine carboxylic acid reactive group.

[0032] S6. Finishing: After spreading and drying, antibacterial finishing is carried out. The antibacterial finishing liquid contains 80g / L chitosan antibacterial agent SA-50DS (produced by TK, Japan). The speed is 40m / min, the rolling rate is 90%, and the fabric is pre-dried at 85℃ and then baked at 115℃ for 3min to obtain the antibacterial fabric. Example 2

[0033] This embodiment provides an antibacterial fabric, and its processing method specifically includes the following steps:

[0034] S1. Weaving: Nylon-cotton blended yarn is used as the yarn and the yarn is weft-knitted on a double-sided jacquard machine to form a double-sided nylon-cotton grey cloth. The outer layer is a weft plain needle structure, and the inner layer is a small jacquard mesh structure. The blending ratio of nylon and cotton is 60 / 40, and the twist is 700 twists / m.

[0035] S2. Fabric arrangement and singeing: After fabric arrangement, the fabric is singed by a gas singeing machine with a singeing fire of 20mbar and a machine speed of 70m / min.

[0036] S3, cold stack desizing: cold stack combined machine is used to perform cold stack desizing on the grey cloth, the temperature is 90℃, the speed is 40m / min, the rolling rate is 60%, and the fabric is stacked at room temperature for 12h after winding and wrapping, and then the residual slurry and reagents are washed away. The desizing working solution contains 2.5g / L refining agent sodium dodecyl sulfate, 6.5g / L hydrogen peroxide, 1.5g / L degreasing agent TF-129K, 0.8g / L oxygen bleaching stabilizer TF-122G and 4g / L caustic soda.

[0037] S4, modification treatment: the desized grey cloth in step S3 is modified by open-width padding-steaming, the modification liquid contains 60g / L oxidized sodium alginate modified hydroxymethyl melamine, 4.5g / L non-silicon penetrant FS, and the pH value is adjusted to 6 by p-toluenesulfonic acid, the padding temperature is 90°C, the vehicle speed is 25m / min, the rolling rate is 80%, and then steamed at 110°C for 30min, followed by alkali washing and water washing.

[0038] S5. One-bath dyeing of nylon and cotton: put into the vat, add 0.3% Anoky NC Ruby, 6% Anoky NC Black, 80g / L sodium sulfate and 2.0g / L alkali agent, first heat to 80℃ at 1.8℃ / min and keep warm for 30min, then slowly heat to 98℃ at 1.2℃ / min, keep warm and dye for 60min, then cool down and drain, wash with water, soap in turn, and then wash the cloth with water.

[0039] S6. Finishing: After spreading and drying, antibacterial finishing is performed. The antibacterial finishing liquid contains 70g / L chitosan antibacterial agent SA-50DS, the vehicle speed is 40m / min, the rolling rate is 100%, and the fabric is pre-dried at 90℃ and then baked at 115℃ for 3min to obtain the antibacterial fabric.

[0040] The synthesis route of the oxidized sodium alginate modified hydroxymethyl melamine in the above Examples 1 and 2 is to first react melamine with oxidized sodium alginate under alkaline conditions to generate oxidized sodium alginate side chains on one of the primary amino groups, and then add formaldehyde aqueous solution at a molar ratio of 1:2 to generate hydroxymethyl groups on the other two primary amino groups. The structural formula of the oxidized sodium alginate modified hydroxymethyl melamine is as follows:

[0041] .

[0042] Comparative Example 1

[0043] The difference between this comparative example and the above-mentioned embodiment 1 is only that step S4 is missing.

[0044] The fabrics of Examples 1-2 and Comparative Example 1 were respectively tested for physical properties, and the test results are shown in Table 1.

[0045] Table 1: Fabric property test table of Examples 1 and 2 of the present invention and Comparative Example 1

[0046]

[0047] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention shall be defined by the attached claims and their equivalents.

Claims

1. A method for processing antibacterial fabrics, characterized in that: The specific steps include: S1, weaving: using nylon-cotton blended yarn as yarn weft weaving to obtain nylon-cotton grey cloth; S2, cloth arrangement and singeing: after cloth arrangement, the cloth is singeed by gas singeing machine; S3, cold stack desizing: cold stack combined machine is used to perform cold stack desizing on the grey cloth, the temperature is 90℃-95℃, the speed is 40m / min~50m / min, the rolling rate is 55%~65%, and after winding and wrapping, it is stacked at room temperature for 12h-18h, and then the residual slurry and reagent are washed away; S4, modification treatment: the desized grey cloth in step S3 is modified by open-width padding-steaming, the pH value is 5.5-6.5, the padding temperature is 90°C-95°C, the vehicle speed is 20m / min-40m / min, the rolling rate is 75%-85%, and then steamed at 105°C-115°C for 20min-30min, and then alkali washed and washed with water; The modified solution used in step S4 contains 40g / L-60g / L of oxidized sodium alginate modified hydroxymethyl melamine, 3g / L-6g / L of non-silicon penetrant FS, and the pH value is adjusted to 5.5-6.5 by p-toluenesulfonic acid; The structural formula of the oxidized sodium alginate modified hydroxymethyl melamine is as follows: ； S5, one-bath dyeing of nylon and cotton: put into the vat, add quaternary ammonium picolinic acid reactive dye, sodium sulfate and alkali agent, first heat to 80±2℃ and keep warm for 25min-35min, then slowly heat to 98±2℃, keep warm and dye for 50min-60min, then cool down and drain, wash with water and soap in sequence, and then wash the cloth with water; S6. Finishing: After spreading and drying, antibacterial finishing is performed to obtain antibacterial fabrics.

2. The method for processing antibacterial fabric according to claim 1, characterized in that: The nylon-cotton grey cloth is woven into a double-sided structure by a double-sided jacquard machine, the outer layer is a plain weft stitch structure, and the inner layer is a small jacquard mesh structure.

3. The method for processing antibacterial fabric according to claim 1, characterized in that: The blending ratio of nylon to cotton in the nylon-cotton blended yarn is 60 / 40 or 68 / 32, and the twist is 600 twists / m-900 twists / m.

4. The method for processing antibacterial fabric according to claim 1, characterized in that: The singeing process of step S2 is as follows: singeing firepower is 20±0.5 mbar, and machine speed is 65 m / min-70 m / min.

5. The method for processing antibacterial fabric according to claim 1, characterized in that: The desizing working solution used in step S3 comprises 1g / L-3g / L refining agent, 6g / L-8g / L hydrogen peroxide, 0.5g / L-1.5g / L degreasing agent, 0.5g / L-1.5g / L oxygen bleaching stabilizer and 2g / L-4g / L caustic soda.

6. The method for processing antibacterial fabric according to claim 1, characterized in that: In the step S5, the heating rate to 80±2°C is 1.5°C / min-2.0°C / min, and the heating rate to 98±2°C is 1°C / min-1.5°C / min.

7. The method for processing antibacterial fabric according to claim 1, characterized in that: The antibacterial finishing liquid in step S6 contains 70g / L-80g / L chitosan antibacterial agent SA-50DS, the vehicle speed is 35m / min-40m / min, the rolling rate is 80%-100%, and the pre-baking and drying at 80℃-90℃ is followed by baking at 110℃-120℃ for 2min-4min.

8. An antibacterial fabric produced by the processing method according to any one of claims 1 to 7.

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