Moisture absorption finishing process and equipment for high-color-fastness spandex product

Abstract

The invention discloses a moisture absorption finishing process and equipment for a high-color-fastness spandex product, and the moisture absorption finishing process comprises the following steps: S1, carrying out pretreatment on the spandex product, and carrying out alkali decrement treatment to obtain a product A; s2, cleaning the product A to obtain a product B; s3, dyeing and cleaning the product B to obtain a product C; and S4, dehydrating and spreading the product C, carrying out color fixation and moisture absorption finishing by using a chitosan acetic acid solution, and finally shaping to obtain a finished product. The color fixing effect of the spandex product can be improved, the moisture absorption performance of the spandex product can be remarkably improved, and the comfort of the fabric during use is improved.

Description

Technical Field

[0001] The invention relates to a moisture absorption finishing process and equipment for spandex products, in particular to a moisture absorption finishing process and equipment for spandex products with high color fastness. Background Art

[0002] Spandex is the abbreviation of polyurethane fiber, which is an elastic fiber. It is highly elastic and can be stretched 6 to 7 times, but it can quickly return to its original state as the tension disappears. However, the moisture absorption and dyeing properties of spandex products are poor, resulting in the dyeing efficiency and dyeing fastness failing to meet the requirements. There will also be a "white space" phenomenon on the surface of the fabric, making the fabric product quality unqualified. In addition, the poor moisture absorption of spandex fabrics will cause spandex products to give users a stuffy feeling and poor comfort. Summary of the invention

[0003] The purpose of the present invention is to provide a moisture absorption finishing process and equipment for spandex products with high color fastness, which can not only improve the color fixation effect of spandex products, but also significantly improve the moisture absorption performance of spandex products and improve the comfort of fabrics when used.

[0004] A technical solution of the present invention: a moisture absorption finishing process for a spandex product with high color fastness, comprising the following steps:

[0005] S1. Pre-treat the spandex product and perform alkali reduction treatment to obtain product A;

[0006] S2. Wash product A to obtain product B;

[0007] S3. Dye and wash product B to obtain product C;

[0008] S4. Dehydrate and spread product C, fix the color and absorb moisture with chitosan acetic acid solution, and finally shape it to obtain the finished product.

[0009] In the aforementioned moisture absorption finishing process of a high color fastness spandex product, the specific steps of dyeing are:

[0010] a1. Use 35℃ distilled water to dissolve the dye to obtain a dye solution with a pH value between 4-6;

[0011] a2. Immerse the spandex product in the dye solution, and heat it up to 50°C at a rate of 3°C / min, keep it warm for 5 minutes, then heat it up to 100°C at a rate of 2.5°C / min, keep it warm for 5 minutes, then heat it up to 130°C at a rate of 3°C / min, keep it warm for 30 minutes;

[0012] a3. Finally, cool down to room temperature at a rate of 4°C / min to complete the dyeing.

[0013] In the aforementioned moisture absorption finishing process of a high color fastness spandex product, the specific steps of the S3 alkali reduction treatment are: immersing product B in an alkali reduction treatment liquid, and controlling the temperature of the alkali reduction treatment liquid to 90°C, the treatment time to 50 minutes, and then drying at 110°C for 3 minutes, the bath ratio of product B to the alkali reduction treatment liquid is 1:10; the concentration of the alkali reduction treatment liquid includes NaOH with a concentration of 10%.

[0014] In the aforementioned moisture absorption finishing process of a high color fastness spandex product, the specific steps of the chitosan acetic acid solution color fixation moisture absorption finishing are:

[0015] b1. Prepare chitosan acetate solution, dissolve chitosan in 0.152 mol / L acetic acid solution, add sufficient anhydrous ethanol to precipitate, filter the precipitate, dry the precipitate in a constant temperature oven at 70° C. to obtain chitosan acetate, dissolve chitosan acetate in distilled water to obtain chitosan acetate solution;

[0016] b2. Immerse the dehydrated and spread product C in a padding and moisture absorption finishing device filled with chitosan acetic acid solution. Product C is dehydrated under the drive of the finishing device. The pH of the chitosan acetic acid solution in the finishing device is 5-6. It is treated at 50°C for 30 minutes, then dehydrated, pre-baked at 100°C for 30 seconds, and then baked at 150°C for 3 minutes;

[0017] b3. Finally, the foam finishing process is used for secondary color fixing and moisture absorption finishing. The foaming ratio during color fixing and moisture absorption finishing is 1:135, the half-life is 336s, the wettability is controlled at 24.2cm, the liquid carrying rate is controlled at 30.0%, and the cloth speed is controlled at 109.2m·min -1 , the drying room temperature is 177℃.

[0018] The above-mentioned equipment for the moisture absorption finishing process of a high color fastness spandex product includes a pre-treatment device, a cleaning device, a immersion and padding moisture absorption finishing device and a foaming finishing device. The immersion and padding moisture absorption finishing device includes a body, a feed roller and a discharge roller are respectively provided at both ends of the body, and a plurality of groups of guide rollers arranged in an upper and lower staggered manner are provided between the feed roller and the discharge roller. The body is provided with a plurality of groups of V-shaped treatment pools with gradually decreasing liquid outlet heights corresponding to the guide rollers, a guide plate corresponding to the V-shaped treatment pool is provided at the upper end of the V-shaped treatment pool, a plurality of groups of spoiler rollers are provided between the V-shaped treatment pool and the guide plate, the spoiler roller is provided with evenly distributed guide blades, a collecting bucket with an opening in the same direction as the rotation direction is provided on one side of the guide blade, a filter plate is provided between the V-shaped treatment pools, and an extrusion roller group for extruding and dehydrating product C is provided on the front side of the filter plate.

[0019] In the aforementioned equipment for the moisture absorption finishing process of a high color fastness spandex product, the extrusion roller group includes an installation box arranged on the side wall of the machine body, a mounting shaft for adjusting the angle of the installation box is provided on the rear side of the installation box, vertically arranged guide grooves are provided on both sides of the installation box, guide blocks are provided in the guide grooves, supports are provided between the guide blocks, a spring vertically arranged and connected to the installation box is provided on one side of the support, a matching block is provided at one end of the support, a wedge block that moves horizontally and corresponds to the matching block is provided in the middle of the installation box, and extrusion rollers are provided between the supports.

[0020] In the aforementioned equipment for the moisture absorption finishing process of a spandex product with high color fastness, a plurality of groups of protrusions are provided on the guide plate.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] 1. The present invention performs alkali reduction treatment on the spandex product and etches the surface of the polyester fiber to roughen the surface of the polyester fiber, which is conducive to the adhesion of chitosan and improves the color fixing effect. In addition, the present application adopts secondary color fixing and moisture absorption finishing, so that the chitosan content on the surface of the spandex product is relatively high, which can significantly improve the hygroscopicity of the spandex product;

[0023] 2. The present invention provides a V-shaped treatment pool and a guide plate, and the spoiler roller is provided with a guide blade and a collecting bucket, so that the chitosan acetate solution can fully pass through the surface and pores of the spandex product, so that a high content of chitosan can be attached to the surface and pores of the spandex product, and the moisture absorption performance of the spandex product is significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 It is a structural schematic diagram of the installation box of the present invention;

[0026] Figure 3 It is a schematic structural diagram of the spoiler roller of the present invention.

[0027] The markings in the accompanying drawings are: 1-machine body, 2-feed roller, 3-discharge roller, 4-guide roller, 5-V-shaped treatment tank, 6-guide plate, 7-spoiler roller, 8-guide blade, 9-collecting bucket, 10-filter plate, 11-squeezing roller group, 12-installing box, 13-installing shaft, 14-support, 15-guide groove, 16-guide block, 17-spring, 18-matching block, 19-wedge block, 20-bump, 21-squeezing roller. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0029] Embodiment. A moisture absorption finishing process for a spandex product with high color fastness comprises the following steps:

[0030] S1. Pre-treat the spandex product and perform alkali reduction treatment to obtain product A;

[0031] S2. Wash product A to obtain product B;

[0032] S3. Dye and wash product B to obtain product C;

[0033] S4. Dehydrate and spread product C, fix the color and absorb moisture with chitosan acetic acid solution, and finally shape it to obtain the finished product.

[0034] The specific steps of the dyeing are:

[0035] a1. Use 35℃ distilled water to dissolve the dye to obtain a dye solution with a pH value between 4-6;

[0036] a2. Immerse the spandex product in the dye solution, and heat it up to 50°C at a rate of 3°C / min, keep it warm for 5 minutes, then heat it up to 100°C at a rate of 2.5°C / min, keep it warm for 5 minutes, then heat it up to 130°C at a rate of 3°C / min, keep it warm for 30 minutes;

[0037] a3. Finally, cool down to room temperature at a rate of 4°C / min to complete the dyeing.

[0038] The specific steps of the S3 alkali reduction treatment are: immersing product B in an alkali reduction treatment solution, and controlling the temperature of the alkali reduction treatment solution to 90°C, the treatment time to 50 minutes, and then drying at 110°C for 3 minutes, the bath ratio of product B to the alkali reduction treatment solution is 1:10; the concentration of the alkali reduction treatment solution includes NaOH with a concentration of 10%.

[0039] The specific steps of the chitosan acetic acid solution fixing and moisture absorption finishing are:

[0040] b1. Prepare chitosan acetate solution, dissolve chitosan in 0.152 mol / L acetic acid solution, add sufficient anhydrous ethanol to precipitate, filter the precipitate, dry the precipitate in a constant temperature oven at 70° C. to obtain chitosan acetate, dissolve chitosan acetate in distilled water to obtain chitosan acetate solution;

[0041] b2. Immerse the dehydrated and spread product C in a padding and moisture absorption finishing device filled with chitosan acetic acid solution. Product C is dehydrated under the drive of the finishing device. The pH of the chitosan acetic acid solution in the finishing device is 5-6. It is treated at 50°C for 30 minutes, then dehydrated, pre-baked at 100°C for 30 seconds, and then baked at 150°C for 3 minutes;

[0042] b3. Finally, the foam finishing process is used for secondary color fixing and moisture absorption finishing. The foaming ratio during color fixing and moisture absorption finishing is 1:135, the half-life is 336s, the wettability is controlled at 24.2cm, the liquid carrying rate is controlled at 30.0%, and the cloth speed is controlled at 109.2m·min -1 , the drying room temperature is 177℃.

[0043] A device for a moisture absorption finishing process of a spandex product with high color fastness, comprising a pre-treatment device, a cleaning device, a padding moisture absorption finishing device and a foaming finishing device, characterized in that: the padding moisture absorption finishing device comprises a body 1, a feed roller 2 and a discharge roller 3 are respectively arranged at both ends of the body 1, a plurality of groups of guide rollers 4 arranged in an upper and lower staggered manner are arranged between the feed roller 2 and the discharge roller 3, a plurality of groups of V-shaped treatment pools 5 corresponding to the guide rollers 4 with gradually decreasing liquid outlet heights are arranged in the body 1, a guide plate 6 corresponding to the V-shaped treatment pool 5 is arranged at the upper end of the V-shaped treatment pool 5, a plurality of groups of spoiler rollers 7 are arranged between the V-shaped treatment pool 5 and the guide plate 6, the spoiler roller 7 is provided with evenly distributed guide blades 8, a collecting bucket 9 with an opening in the same direction as the rotation direction is arranged on one side of the guide blade 8, a filter plate 10 is arranged between the V-shaped treatment pools 5, and an extrusion roller group 11 for extruding and dehydrating product C is arranged on the front side of the filter plate 10.

[0044] The squeezing roller group 11 includes a mounting box 12 arranged on the side wall of the body 1, a mounting shaft 13 for adjusting the angle of the mounting box 12 is arranged on the rear side of the mounting box 12, vertically arranged guide grooves 15 are arranged on both sides of the mounting box 12, guide blocks 16 are arranged in the guide grooves 15, and a support 14 is arranged between the guide blocks 16, a spring 17 vertically arranged and connected to the mounting box 12 is arranged on one side of the support 14, a matching block 18 is arranged at one end of the support 14, a wedge block 19 that moves horizontally and corresponds to the matching block 18 is arranged in the middle of the mounting box 12, and a squeezing roller 21 is arranged between the supports 14.

[0045] The guide plate 6 is provided with a plurality of groups of protrusions 20 .

[0046] This application first pre-treats the spandex product, such as removing impurities and cleaning, and then performs alkali reduction treatment to etch the surface of the polyester fiber, making the surface of the polyester fiber rough, which is conducive to the combination of the dye and the polyester fiber, and is conducive to the reaction with the chitosan acetic acid solution to improve the color fixation effect. Then dyeing is performed, and the cleaning process after dyeing includes reduction cleaning, hot water cleaning and other steps, which are performed after dehydration and spreading. This application uses a secondary chitosan acetic acid solution for color fixation to increase the chitosan content on the surface of the polyester fiber and improve the moisture absorption effect of the polyester fabric. The first color fixation is performed by a humidification finishing device, and the second color fixation of the polyester product is performed by a foaming finishing device. When preparing chitosan acetic acid solution, chitosan is first dissolved in 0.152mol / L acetic acid solution, sufficient anhydrous ethanol is added to precipitate, the precipitate is filtered, and the precipitate is placed in a constant temperature oven at 70°C for drying to obtain chitosan acetate, and chitosan acetate is dissolved in distilled water to obtain chitosan acetic acid solution, so that the chitosan acetic acid solution obtained has higher purity. The present application mainly improves the padding and hygroscopic finishing equipment. The present application changes the flow diameter by setting a V-shaped treatment tank 5 and a guide plate 6, so that the flow direction of the chitosan acetic acid solution is easier to change, and the height of the liquid inlet end of the V-shaped treatment tank 5 is higher than the height of the liquid outlet end, so that the chitosan acetic acid solution can flow from the liquid inlet end to the liquid outlet end, and the bottom of the V-shaped treatment tank 5 on the rear side is provided with a discharge port, and a pump can be further provided under the discharge port to drive the chitosan acetic acid solution in the rear side V-shaped treatment tank 5 to be transported to the front side V-shaped treatment tank 5. In addition, multiple groups of spoiler rollers 7 are provided between the V-shaped treatment pool 5 and the guide plate 6. The spoiler rollers 7 are provided with evenly distributed guide blades 8. A collecting bucket 9 with an opening in the same direction as the rotation direction is provided on one side of the guide blade 8. The surface of the collecting bucket 9 is provided with filter holes, so that when the chitosan acetic acid solution flows, the guide blade 8 can drive the spoiler roller 7 to rotate, so that the collecting bucket 9 can collect impurities in the chitosan acetic acid solution. In addition, this will change the flow direction of the chitosan acetic acid solution, so that the chitosan acetic acid solution can fully flow through the surface and pores of the spandex product, improve the combination effect of the chitosan film and the spandex product, and the setting of the protrusion 20 can further enhance the spoiler effect. In the process of conveying the spandex product, the spandex product will be squeezed by the squeezing roller group 11 to squeeze out the chitosan acetic acid solution in the spandex product. During extrusion, the angle of the installation box 12 can be adjusted by the installation shaft 13, which passes through the side wall of the machine body 1. The end of the installation shaft is provided with an external thread, and the installation shaft is locked by fasteners such as nuts and washers. In this way, the angle of the installation box can be changed, so that the axis line of the two extrusion rollers can be perpendicular to the movement direction of the spandex product, and the extrusion effect is better. Due to the difference in thickness of spandex products, the gap of the extrusion roller 21 needs to be adjusted.When the gap between the squeezing roller 21 needs to be increased, the present application drives the wedge block 19 to move toward the middle of the installation box 12. The driving member can be a screw with a ball connector. The wedge block 19 will press the matching block 18 to make the support 14 move up and down. When the support moves, the spring 17 will be compressed, and the contact surface angle between the wedge block 19 and the matching block 18 is small. In this way, when the wedge block moves a large distance, the support moves a small distance, and the control is more precise. When reducing the gap, the wedge block 19 can be moved outward to make the support move toward the middle of the installation box 12 under the action of the spring.

Claims

1. A moisture absorption finishing process for a high color fastness spandex product, characterized in that: The following steps are involved: S1. Pre-treat the spandex product and perform alkali reduction treatment to obtain product A; S2. Wash product A to obtain product B; S3. Dye and wash product B to obtain product C; S4. Dehydrate and spread product C, fix the color and absorb moisture with chitosan acetic acid solution, and finally shape it to obtain the finished product.

2. The hygroscopic finishing process for a high color fastness spandex product according to claim 1, characterized in that: The specific steps of the dyeing are: a1. Use 35℃ distilled water to dissolve the dye to obtain a dye solution with a pH value between 4-6; a2. Immerse the spandex product in the dye solution, and heat it up to 50°C at a rate of 3°C / min, keep it warm for 5 minutes, then heat it up to 100°C at a rate of 2.5°C / min, keep it warm for 5 minutes, then heat it up to 130°C at a rate of 3°C / min, keep it warm for 30 minutes; a3. Finally, cool down to room temperature at a rate of 4°C / min to complete the dyeing.

3. The hygroscopic finishing process for a spandex product with high color fastness according to claim 1, characterized in that: The specific steps of the S3 alkali reduction treatment are: immersing product B in an alkali reduction treatment solution, and controlling the temperature of the alkali reduction treatment solution to 90°C, the treatment time to 50 minutes, and then drying at 110°C for 3 minutes, the bath ratio of product B to the alkali reduction treatment solution is 1:10; the concentration of the alkali reduction treatment solution includes NaOH with a concentration of 10%.

4. The hygroscopic finishing process for a spandex product with high color fastness according to claim 1, characterized in that: The specific steps of the chitosan acetic acid solution fixing and moisture absorption finishing are: b1. Prepare chitosan acetate solution, dissolve chitosan in 0.152 mol / L acetic acid solution, add sufficient anhydrous ethanol to precipitate, filter the precipitate, dry the precipitate in a constant temperature oven at 70° C. to obtain chitosan acetate, dissolve chitosan acetate in distilled water to obtain chitosan acetate solution; b2. Immerse the dehydrated and spread product C in a padding and moisture absorption finishing device filled with chitosan acetic acid solution. Product C is dehydrated under the drive of the finishing device. The pH of the chitosan acetic acid solution in the finishing device is 5-6. It is treated at 50°C for 30 minutes, then dehydrated, pre-baked at 100°C for 30 seconds, and then baked at 150°C for 3 minutes; b3. Finally, the foam finishing process is used for secondary color fixing and moisture absorption finishing. The foaming ratio during color fixing and moisture absorption finishing is 1:135, the half-life is 336s, the wettability is controlled at 24.2cm, the liquid carrying rate is controlled at 30.0%, and the cloth speed is controlled at 109.2m·min -1 , the drying room temperature is 177℃.

5. The equipment for the moisture absorption finishing process of a high color fastness spandex product according to claims 1-4, comprising a pre-treatment device, a cleaning device, a padding moisture absorption finishing device and a foaming finishing device, characterized in that: The padding moisture absorption finishing equipment comprises a machine body (1), wherein a feed roller (2) and a discharge roller (3) are respectively arranged at both ends of the machine body (1), and a plurality of guide rollers (4) are arranged between the feed roller (2) and the discharge roller (3) and are arranged in an upper and lower staggered manner. The machine body (1) is provided with a plurality of V-shaped treatment pools (5) corresponding to the guide rollers (4) and having gradually decreasing liquid outlet end heights. A guide plate (6) corresponding to the V-shaped treatment pool (5) is arranged at the upper end of the V-shaped treatment pool (5), and a plurality of spoiler rollers (7) are arranged between the V-shaped treatment pool (5) and the guide plate (6). The spoiler rollers (7) are provided with evenly distributed guide blades (8), and a collecting bucket (9) with an opening in the same direction as the rotation direction is arranged on one side of the guide blade (8). A filter plate (10) is arranged between the V-shaped treatment pools (5), and a squeezing roller group (11) for squeezing and dehydrating the C product is arranged on the front side of the filter plate (10).

6. The equipment for moisture absorption finishing process of a high color fastness spandex product according to claim 5, characterized in that: The squeezing roller group (11) comprises a mounting box (12) arranged on the side wall of the machine body (1), a mounting shaft (13) for adjusting the angle of the mounting box (12) is arranged at the rear side of the mounting box (12), vertically arranged guide grooves (15) are arranged on both sides of the mounting box (12), guide blocks (16) are arranged in the guide grooves (15), a support (14) is arranged between the guide blocks (16), a spring (17) vertically arranged and connected to the mounting box (12) is arranged on one side of the support (14), a matching block (18) is arranged at one end of the support (14), a wedge block (19) which moves horizontally and corresponds to the matching block (18) is arranged in the middle of the mounting box (12), and a squeezing roller (21) is arranged between the supports (14).

7. The equipment for moisture absorption finishing process of a high color fastness spandex product according to claim 5, characterized in that: The guide plate (6) is provided with a plurality of groups of protrusions (20).

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