Environment-friendly dyeing preparation process for 3D (three-dimensional) nano fabric

Abstract

The invention discloses a 3D nano fabric environment-friendly dyeing preparation process, which specifically comprises the following steps: S1, preparation work: pre-treating and preparing materials used in dyeing; s2, padding: immersing the pretreated fabric into a nano working solution, enabling the fabric to uniformly carry the solution through a padder, and carrying out dyeing treatment of two times of padding and two times of rolling; s3, primary pre-drying: pre-drying the fabric by using infrared rays so as to remove moisture on the surface of the fabric; s4, secondary pre-drying: further removing moisture in the fabric by using hot air; s5, baking is carried out; and S6, carrying out post-treatment. By means of the arrangement mode that the pad dyeing step and the baking step are matched, energy consumption is low, production cost can be reduced easily, color matching is visual, color imitation is easy, dyeing is free of sewage discharge, the environment-friendly requirement is met, the hue is stable, covering power is high, compared with a traditional technology, only water is used in pad dyeing, the water consumption in the later printing and dyeing step is small, pollution is low, energy consumption is low, and dye is natural; and water resources are saved.

Description

Technical Field

[0001] The present invention relates to the technical field of environmentally friendly dyeing of fabrics, and in particular to a preparation process of environmentally friendly nano dyeing of 3D fabrics. Background Art

[0002] Dyeing fabrics is to improve the appearance and functionality of textiles and meet market demand. Fabric dyeing is a technology that affects the substance itself through chemical or other methods to make it colored. This technology has existed since ancient times and has continued to improve with the development of technology. Dyeing can make objects present various colors that people need, decorate life with colorful colors, and increase visual beauty. In the textile industry, dyeing is a key link to improve the functional quality of textiles and enhance the competitiveness of high-end textile clusters. For example, in Jiangsu, the scale of the printing and dyeing industry accounts for about 6% of the total scale of the textile industry, and plays an extremely important supporting role in the construction of high-end textile clusters. Dyeing fabrics is to improve the appearance and functionality of textiles to meet market demand, and it is also an important means to increase product added value and market competitiveness.

[0003] In the traditional dyeing process, including dyeing, drying, padding, steaming, washing, drying and other processes, water needs to be used for washing many times to remove floating colors, unfixed dyes, chemical additives, etc. on the fabric. These washing steps consume a lot of water resources. Low dyeing efficiency: In the traditional dyeing process, the dye uptake rate is not high, resulting in a large amount of dye failing to effectively adhere to the fiber and needing to be washed away, increasing the consumption of water resources. Summary of the invention

[0004] The purpose of the present invention is to provide a 3D fabric environmentally friendly nano-dyeing preparation process to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a 3D fabric environmentally friendly nano-dyeing preparation process, the fabric dyeing process specifically includes the following steps:

[0006] S1, preparation, pretreatment and preparation of materials used in dyeing;

[0007] S2, padding, immersing the pretreated fabric in the nano working liquid, using a padder to make the fabric evenly stained with the liquid, and performing a double-dip and double-pad dyeing treatment;

[0008] S3, one-time pre-drying, using infrared rays to pre-dry the fabric to remove surface moisture, so that the moisture content of the fabric reaches the range of 25% to 30%;

[0009] S4, secondary pre-drying, uses hot air to further remove moisture from the fabric;

[0010] S5, baking, drying the fabric after the second pre-baking in step S4 again by hot air, so that the adhesive forms a transparent resin film on the fabric, fixing the coating on the surface of the fabric;

[0011] S6, post-processing, finishing treatment of the dyed fabric as needed, such as shaping, softening, etc.

[0012] Preferably, in step S1, the preparation work includes: before dyeing, pretreatment of the fabric, including removal of grease and impurities to ensure the consistency and color fastness of the dyeing effect; mixing the dye, selecting and using auxiliaries according to specific requirements, selecting a suitable padder according to the width of the fabric, adjusting the padder roller to be flat, and selecting the padder pressure according to the thickness of the fabric.

[0013] Preferably, in step S1, the process of mixing the dye comprises the following steps:

[0014] S11, grinding, grinding the coating with a sand mill until the fineness reaches the nanometer level;

[0015] S12, filtering and purifying, using filtering equipment to remove coarse residues and impurities in the paint to obtain nano-scale paint dyes;

[0016] S13, pre-dispersion, uses a high-speed disperser to preliminarily mix and disperse the raw materials of the coating.

[0017] Preferably, in step S13, the raw materials of the coating are one or more of natural mineral mud, soil, and sand.

[0018] Preferably, in step S2, the double-dipping and double-padding dyeing process comprises the following steps:

[0019] S21, one-time padding, putting the fabric into the padder, adding appropriate amount of dye and auxiliaries, and soaking for a certain time. The soaking time and dye concentration are adjusted according to the specific requirements of different fabrics;

[0020] S22, primary pad dyeing, taking out the fabric after padding in step S21, and using a padder to evenly roll the dye solution into the fabric; the pressure of the padder and the concentration of the padding solution are adjusted according to specific requirements.

[0021] S23, drying, putting the fabric after roller dyeing in step S22 into a drying machine for drying; the drying temperature and time are adjusted according to the material of the fabric and the characteristics of the dye.

[0022] S24, secondary padding, putting the fabric dried in step S23 into the padder again, adding appropriate amounts of dyes and auxiliaries, and soaking for a certain period of time. The soaking time and dye concentration are adjusted according to the specific requirements of different fabrics;

[0023] S25, secondary pad dyeing, taking out the fabric after padding in step S24, and using a padder to evenly roll the dye solution into the fabric. The pressure of the padder and the concentration of the padding solution are adjusted according to specific requirements.

[0024] Preferably, in steps S21 and S24, the auxiliary agent used is one or more of a dispersant, a penetrant, a color fixing agent, a softener, and a cross-linking agent.

[0025] Preferably, in step S3, the surface temperature of the radiator of the infrared pre-drying machine is usually set in the range of 500-600°C to produce mid-infrared rays with a main absorption wavelength of 4 to 5 μm, and infrared rays with a wavelength of 2.7 to 15 μm are used for heating and drying, because thin water films and various textile fibers have a higher absorption rate for infrared rays in this wavelength range.

[0026] Preferably, in step S4, the hot air temperature of the secondary pre-baking is 70-100°C.

[0027] Preferably, in step S5, two baking conditions are set according to different fabrics, one baking condition is a baking temperature of 150-160°C and a baking time of 90s, and the other baking condition is a baking temperature of 180°C and a baking time of 30s.

[0028] Preferably, in step S6, the finishing treatment includes hot pressing and sanding. The hot pressing treatment process is to press the fabric under high temperature and high pressure to physically deform the fibers and fix the shape. The sanding treatment process is to use mechanical methods to produce fine fluff on the surface of the fabric to increase the softness and comfort of the fabric.

[0029] Technical effects and advantages of the present invention:

[0030] The present invention utilizes a setting mode in which the roller dyeing and baking steps are coordinated. This cloth dyeing mode has strong variety adaptability and is suitable for a variety of fiber products. The process flow is short, the operation is simple, the energy consumption is low, and it is beneficial to reduce production costs. The color matching is intuitive, the color imitation is easy, the dyeing has no sewage discharge, and it meets environmental protection requirements. The color is stable and the covering power is strong. Compared with the traditional process, this process only uses water for roller dyeing, and the water consumption in the later printing and dyeing steps is small, the pollution is low, the energy consumption is low, the dye is natural, and water resources are saved. The fabric manufactured by using this process and the dye has the style and characteristic feel of imitating washed jeans. The fabric can be polyester, nylon, cotton, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a flowchart of the dyeing process of the present invention. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] The present invention provides Figure 1 A 3D fabric environmentally friendly nano-dyeing preparation process is shown, and the fabric dyeing process specifically includes the following steps:

[0034] S1, preparation, pretreatment and preparation of materials used in dyeing;

[0035] S2, padding, immerses the pretreated fabric in the nano-working liquid, and uses a padder to make the fabric evenly stained with liquid, and then performs a two-dip and two-pad dyeing process; the two-dip and two-pad coating dyeing process can improve the uniformity and color fastness of dyeing, and is suitable for mass production. In addition, due to the reduction of the washing step, it has the advantages of energy saving, water saving and environmental protection. However, the feel and friction fastness of coating dyeing may not be as good as those of traditional dye dyeing, so when choosing a dyeing process, it is necessary to weigh the specific requirements of the product.

[0036] S3, one-time pre-drying, using infrared rays to pre-dry the fabric to remove surface moisture, so that the moisture content of the fabric reaches the range of 25% to 30%;

[0037] S4, secondary pre-drying, uses hot air to further remove moisture from the fabric;

[0038] S5, baking, the fabric pre-baked twice in step S4 is dried again by hot air, so that the adhesive forms a transparent resin film on the fabric, fixing the coating on the surface of the fabric; the dye coating makes the fabric thicker, forming a 3D effect of the fabric.

[0039] S6, post-processing, finishing treatment of the dyed fabric as needed, such as shaping, softening, etc.

[0040] Furthermore, in step S1, the preparation work includes: pre-treatment of the fabric before dyeing, including removal of grease and impurities to ensure the consistency and color fastness of the dyeing effect; mixing the dye, selecting and using auxiliaries according to specific requirements, selecting a suitable padder according to the width of the fabric, adjusting the padder roller to be flat, and selecting the padder pressure according to the thickness of the fabric.

[0041] This method of fabric dyeing has strong adaptability and is suitable for a variety of fiber products. It has a short process flow, simple operation, low energy consumption, and is conducive to reducing production costs. The color matching is intuitive, color imitation is easy, there is no sewage discharge during dyeing, and it meets environmental protection requirements. The hue is stable and the covering power is strong. Compared with the traditional process, this process only uses water in pad dyeing, and the later printing and dyeing steps use less water, have low pollution, low energy consumption, and natural dyes, which save water resources.

[0042] Furthermore, in step S1, the dye preparation process includes the following steps:

[0043] S11, grinding, grinding the coating with a sand mill until the fineness reaches the nanometer level;

[0044] S12, filtering and purifying, using filtering equipment to remove coarse residues and impurities in the paint to obtain nano-scale paint dyes;

[0045] S13, pre-dispersion, uses a high-speed disperser to preliminarily mix and disperse the raw materials of the coating.

[0046] Furthermore, in step S13, the raw materials of the coating are one or more of natural mineral mud, soil, and sand.

[0047] Further, in step S2, the double-dipping and double-padding dyeing process includes the following steps:

[0048] S21, one-time padding, putting the fabric into the padder, adding appropriate amount of dye and auxiliaries, and soaking for a certain time. The soaking time and dye concentration are adjusted according to the specific requirements of different fabrics;

[0049] S22, primary pad dyeing, taking out the fabric after padding in step S21, and using a padder to evenly roll the dye solution into the fabric; the pressure of the padder and the concentration of the padding solution are adjusted according to specific requirements.

[0050] S23, drying, putting the fabric after roller dyeing in step S22 into a drying machine for drying; the drying temperature and time are adjusted according to the material of the fabric and the characteristics of the dye.

[0051] S24, secondary padding, putting the fabric dried in step S23 into the padder again, adding appropriate amounts of dyes and auxiliaries, and soaking for a certain period of time. The soaking time and dye concentration are adjusted according to the specific requirements of different fabrics;

[0052] S25, secondary pad dyeing, taking out the fabric after padding in step S24, and using a padder to evenly roll the dye solution into the fabric. The pressure of the padder and the concentration of the padding solution are adjusted according to specific requirements.

[0053] Furthermore, in steps S21 and S24, the auxiliary agents used are one or more of a dispersant, a penetrant, a color fixer, a softener, and a cross-linking agent. The function of the dispersant is to help the dye disperse evenly in the water to prevent the dye from agglomerating or precipitating; the function of the penetrant is to increase the permeability of the dye inside the fiber to ensure deep coloring of the fiber. The function of the color fixer is to improve the color fastness of the dye on the fiber and reduce the color fading during washing or friction. An emulsifier is used to make a stable emulsion of water-insoluble chemicals for easy use. A softener gives the fabric a soft feel and reduces friction between fibers. The function of a cross-linking agent is to increase the bonding force between the dye and the fiber in certain dyeing processes.

[0054] Furthermore, in step S3, the surface temperature of the radiator of the infrared pre-drying machine is usually set in the range of 500-600°C to produce mid-infrared rays with a main absorption wavelength of 4 to 5 μm, and infrared rays with a wavelength of 2.7 to 15 μm are used for heating and drying, because thin water films and various textile fibers have a higher absorption rate for infrared rays in this wavelength range.

[0055] Furthermore, in step S4, the temperature of the hot air in the secondary pre-baking is 70-100°C.

[0056] Furthermore, in step S5, two baking conditions are set according to different fabrics, one baking condition is a baking temperature of 150-160°C and a baking time of 90s, and the other baking condition is a baking temperature of 180°C and a baking time of 30s.

[0057] Furthermore, in step S6, the finishing treatment includes hot pressing and sanding. The hot pressing treatment process is to press the fabric under high temperature and high pressure to physically deform the fibers and fix the shape. The sanding treatment process is to use mechanical methods to produce fine fluff on the surface of the fabric to increase the softness and comfort of the fabric.

[0058] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A 3D nano-fabric environmentally friendly dyeing preparation process, characterized in that: The fabric dyeing process specifically includes the following steps: S1, preparation, pretreatment and preparation of materials used in dyeing; S2, padding, immersing the pretreated fabric in the nano working liquid, using a padder to make the fabric evenly stained with the liquid, and performing a double-dip and double-pad dyeing process; S3, one-time pre-drying, using infrared rays to pre-dry the fabric to remove surface moisture, so that the moisture content of the fabric reaches the range of 25% to 30%; S4, secondary pre-drying, uses hot air to further remove moisture from the fabric; S5, baking, drying the fabric after the second pre-baking in step S4 again by hot air, so that the adhesive forms a transparent resin film on the fabric, fixing the coating on the surface of the fabric; S6, post-processing, finishing the dyed fabrics as needed.

2. The 3D nano-fabric environmentally friendly dyeing preparation process according to claim 1 is characterized in that: In step S1, the preparation work includes: pre-treatment of the fabric before dyeing, including removal of grease and impurities; mixing the dye, selecting and using auxiliaries according to specific requirements, selecting a suitable padder according to the width of the fabric, adjusting the padder roller to be flat, and selecting the padder pressure according to the thickness of the fabric.

3. The 3D nano-fabric environmentally friendly dyeing preparation process according to claim 2 is characterized in that: In step S1, the dye preparation process includes the following steps: S11, grinding, grinding the coating with a sand mill until the fineness reaches the nanometer level; S12, filtering and purifying, using filtering equipment to remove coarse residues and impurities in the paint to obtain nano-scale paint dyes; S13, pre-dispersion, uses a high-speed disperser to preliminarily mix and disperse the raw materials of the coating.

4. The 3D nano-fabric environmentally friendly dyeing preparation process according to claim 3 is characterized in that: In step S13, the raw materials of the coating are one or more of natural mineral mud, soil, and sand.

5. The 3D nano-fabric environmentally friendly dyeing preparation process according to claim 1 is characterized in that: In step S2, the double-dip and double-pad dyeing process includes the following steps: S21, one-time padding, putting the fabric into the padder, adding appropriate amount of dye and auxiliaries, and soaking for a certain time. The soaking time and dye concentration are adjusted according to the specific requirements of different fabrics; S22, primary pad dyeing, taking out the fabric after padding in step S21, and using a padder to evenly roll the dye solution into the fabric; S23, drying, placing the fabric after pad dyeing in step S22 into a drying machine for drying; S24, secondary padding, putting the fabric dried in step S23 into the padder again, adding appropriate amounts of dyes and auxiliaries, and soaking for a certain period of time. The soaking time and dye concentration are adjusted according to the specific requirements of different fabrics; S25, secondary pad dyeing, taking out the fabric after padding in step S24, and using a padder to evenly roll the dye solution into the fabric.

6. The 3D nano-fabric environmentally friendly dyeing preparation process according to claim 5 is characterized in that: In steps S21 and S24, the auxiliary agent used is one or more of a dispersant, a penetrant, a color fixing agent, a softener, and a cross-linking agent.

7. The 3D nano-fabric environmentally friendly dyeing preparation process according to claim 1 is characterized in that: In step S3, the surface temperature of the radiator of the infrared pre-drying machine is usually set in the range of 500-600°C, and infrared rays with a wavelength of 2.7 to 15 μm are used for heating and drying.

8. The 3D nano-fabric environmentally friendly dyeing preparation process according to claim 1 is characterized in that: In step S4, the hot air temperature of the secondary pre-baking is 70-100°C.

9. The 3D nano-fabric environmentally friendly dyeing preparation process according to claim 1 is characterized in that: In step S5, two baking conditions are set according to different fabrics, one baking condition is a baking temperature of 150-160°C and a baking time of 90 seconds, and the other baking condition is a baking temperature of 180°C and a baking time of 30 seconds.

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