Striped fabric flow dyeing process and preparation device

Abstract

This invention provides a striped fabric water-based dyeing process and preparation apparatus, comprising the following steps: S1, the fabric is flattened and rolled up, and then passed through a dye bath to fully immerse and absorb the dye solution, achieving uniform dyeing; S2, the dyed fabric is squeezed by a roller to effectively remove excess liquid, providing a suitable amount of liquid for subsequent processes; S3, the fabric is physically pleated using a pleating forming device to create uniform and regular pleats; S4, the fabric with uniform pleats is sent to a single-sided ironing and drying device for ironing and drying; S5, the fabric is washed and then dried and shaped. This invention innovatively utilizes the dye migration effect, which needs to be suppressed and eliminated in traditional dyeing processes, to create a natural water-based texture with alternating light and dark colors between the peaks and troughs of the pleats, resulting in a more aesthetically pleasing and efficient production process.

Description

Technical Field

[0001] This invention relates to a flowing water dyeing process and preparation apparatus, particularly a flowing water dyeing process and preparation apparatus for striped fabrics. Background Technology

[0002] In the textile printing and dyeing industry, in order to give fabrics unique stripe or texture effects, traditional processing methods are mainly divided into two categories: one is to use printing technology, which uses a screen or roller to directly press the dye paste onto the fabric surface to form a predetermined pattern; the other is to use traditional hand or semi-hand resist dyeing techniques such as tie-dyeing and batik, which use physical means to prevent the dye from penetrating, thereby forming patterns.

[0003] However, the aforementioned existing technologies have significant limitations in practical applications. First, while traditional printing processes produce clear patterns, they are complex, requiring large amounts of printing paste and auxiliaries, and the subsequent cleaning process is arduous, resulting in high energy consumption and significant environmental impact from the wastewater generated. Furthermore, the stripes obtained through printing processes typically exist only on the fabric surface, resulting in a stiff feel, a lack of natural gradation, and a harsh visual effect.

[0004] Secondly, although tie-dyeing and other resist-dyeing processes can produce a natural water ripple effect, their production efficiency is extremely low, making it difficult to achieve continuous industrial production. Furthermore, the consistency and controllability of the patterns are poor, failing to meet the modern textile market's demand for high-quality, mass-produced striped fabrics. Summary of the Invention

[0005] The purpose of this invention is to provide a striped fabric water-dyeing process and preparation apparatus. This invention innovatively utilizes the dye migration effect, which needs to be suppressed and eliminated in traditional dyeing processes, by physically pleating the fabric after dyeing and employing a single-sided ironing and drying method so that only one side of the fabric is in contact with the ironing roller. During the high-temperature drying process, the migration effect of dye towards the contact surface due to heat promotes the concentration of dye liquor on the heated surface, thereby creating a natural water-like texture with alternating light and dark colors between the crests and troughs of the pleats. This not only makes the fabric more aesthetically pleasing but also increases production efficiency.

[0006] The technical solution of this invention: a water-jet dyeing process for striped fabrics, comprising the following steps:

[0007] S1. The fabric is flattened and rolled up, and then passed through the dye bath to fully immerse and absorb the dye solution, thus completing the uniform dyeing process.

[0008] S2. After dyeing, the fabric is squeezed by a rolling mill to effectively remove excess liquid and provide a suitable amount of liquid for subsequent processes.

[0009] S3. The fabric is physically pleated by a pleating device to form uniform and regular pleats.

[0010] S4. Fabric with uniform pleats is fed into a single-sided ironing and drying equipment for ironing and drying treatment, and only one side of the fabric pleats is in contact with the ironing roller of the single-sided ironing and drying equipment. During the high-temperature drying process, the migration effect of dyes migrating to the contact surface when heated is utilized to promote the enrichment of dye liquor to the heated surface, thereby forming a natural flowing water texture with alternating light and dark colors on the fabric.

[0011] S5. Wash the fabric and then dry and shape it.

[0012] A preparation apparatus for a striped fabric water dyeing process includes a leveling machine, a dye tank, a rolling mill, a pleating device, a single-sided ironing and drying device, a washing tank, and a drying and setting machine arranged in sequence. The rolling mill includes supports at both ends, a lower pressure roller fixedly arranged between the supports, an upper pressure roller that can be raised and lowered relative to the lower pressure roller on the upper side of the lower pressure roller, guide blocks at both ends of the upper pressure roller, guide grooves corresponding to the guide blocks in the supports, limiting strips on both sides of the guide grooves, limiting grooves corresponding to the limiting strips on both sides of the guide blocks, and a pneumatic push rod for driving the movement of the guide blocks on the upper side of the guide blocks.

[0013] In the aforementioned preparation device for a striped fabric water dyeing process, the pleating forming device includes a frame, a lower forming frame fixedly connected to the upper side of the frame, and an upper forming frame that cooperates with the mounting column at the end of the lower forming frame to form uniform pleats on the fabric.

[0014] In the aforementioned preparation device for a striped fabric water-dyeing process, the lower forming frame includes a first support rod and a second support rod arranged in parallel with unequal lengths. The length of the first support rod is less than the length of the second support rod. An evenly distributed, upwardly protruding upper extrusion rod is provided between the first and second support rods, and the distance between adjacent upper extrusion rods on the first support rod is less than the distance on the second support rod. The upper forming frame includes a third support rod and a fourth support rod arranged in parallel with unequal lengths. The length of the third support rod is less than the length of the fourth support rod. An evenly distributed, downwardly protruding lower extrusion rod is provided between the third and fourth support rods, and the distance between adjacent lower extrusion rods on the third support rod is less than the distance on the fourth support rod. The upper and lower extrusion rods are staggered.

[0015] In the aforementioned preparation device for a striped fabric water dyeing process, the ends of the third and fourth support rods are provided with limiting holes corresponding to the mounting columns, and the limiting holes are open holes.

[0016] In the aforementioned apparatus for preparing striped fabric using a water-based dyeing process, the mounting column has external threads on its surface, and the mounting column is fixed to the third and fourth support rods by nuts. The spacing between the lower and upper forming frames is adjusted by using washers or nuts between the first, second, third, and fourth support rods.

[0017] In the aforementioned preparation device for a striped fabric water dyeing process, the single-sided ironing and drying equipment includes a support frame, in which multiple sets of ironing rollers are arranged vertically, and a reversing roller is provided on one side of each set of ironing rollers.

[0018] In the aforementioned preparation device for a striped fabric water dyeing process, the ironing roller is an electric heating ironing roller or a steam ironing roller.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] 1. This invention innovatively utilizes the dye migration effect, which needs to be suppressed and eliminated in traditional dyeing processes, in a positive direction. By physically pleating the fabric after dyeing and using a single-sided ironing and drying method, ensuring that only one side of the fabric is in contact with the ironing roller, the dye migrates towards the contact surface during the high-temperature drying process, causing the dye liquor to concentrate on the heated surface. This results in a natural flowing texture with alternating shades between the crests and troughs of the pleats. This texture has a natural transition and rich layers.

[0021] 2. The pleating device provided by this invention adopts a structure with upper and lower forming frames working together. Through the staggered cooperation of the first and second support rods, the third and fourth support rods of unequal lengths, and the upper and lower extrusion rods with gradually varying spacing, the fabric can form uniform and regular pleats. The device has a simple structure and is easy to operate. The ends of each support rod are fixed with nuts, and the spacing can be adjusted by using washers or nuts, thus adapting to fabrics with different thicknesses and different pleat densities, and has strong versatility.

[0022] 3. The single-sided ironing and drying equipment of the present invention adopts a structure of multiple sets of ironing rollers distributed vertically and vertically in conjunction with reversing rollers, so that the pleated fabric always only has one side in contact with the ironing roller during the conveying process, ensuring the unidirectionality and consistency of the migration effect, ensuring the stable reproduction of the flowing texture effect, suitable for industrial continuous production, and with high production efficiency. Attached Figure Description

[0023] Figure 1 This is a flowchart of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of the rolling mill of the present invention;

[0025] Figure 3 This is a schematic diagram of the pleating forming device of the present invention;

[0026] Figure 4 This is a schematic diagram of the single-sided hot-drying equipment of the present invention.

[0027] The markings in the attached diagram are as follows: 1-Limiting hole, 4-Pleating forming device, 4.1-Frame, 4.2-Mounting column, 4.3-Lower forming frame, 4.4-First support rod, 4.5-Second support rod, 4.6-Upper extrusion rod, 4.7-Third support rod, 4.8-Fourth support rod, 4.9-Lower extrusion rod, 4.10-Upper forming frame, 5-Bracket, 6-Hot roller, 7-Reversing roller, 8-Rolling car, 8.1-Support, 8.2-Lower pressure roller, 8.3-Upper pressure roller, 8.4-Guide block, 8.5-Guide groove, 8.6-Limiting strip, 8.7-Limiting groove, 8.8-Pneumatic push rod, 9-Single-sided hot and dry equipment. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0029] Example. A striped fabric water-based dyeing process and preparation apparatus, comprising as follows: Figure 1-4 As shown, it includes the following steps:

[0030] S1. The fabric is flattened and rolled up, and then passed through the dye bath to fully immerse and absorb the dye solution, thus completing the uniform dyeing process.

[0031] S2. After dyeing, the fabric is squeezed by a rolling mill to effectively remove excess liquid and provide a suitable amount of liquid for subsequent processes.

[0032] S3. The fabric is physically pleated by a pleating device to form uniform and regular pleats.

[0033] S4. Fabric with uniform pleats is fed into a single-sided ironing and drying equipment for ironing and drying treatment, and only one side of the fabric pleats is in contact with the ironing roller of the single-sided ironing and drying equipment. During the high-temperature drying process, the migration effect of dyes migrating to the contact surface when heated is utilized to promote the enrichment of dye liquor to the heated surface, thereby forming a natural flowing water texture with alternating light and dark colors on the fabric.

[0034] S5. Wash the fabric and then dry and shape it.

[0035] A preparation apparatus for a striped fabric water-based dyeing process includes a leveling machine, a dye tank, a rolling mill 8, a pleating forming device 4, a single-sided ironing and drying device 9, a washing tank, and a drying and setting machine arranged sequentially. The rolling mill 8 includes supports 8.1 at both ends, a lower pressure roller 8.2 fixedly arranged between the supports 8.1, an upper pressure roller 8.3 that can be raised and lowered relative to the lower pressure roller 8.2 on the upper side, guide blocks 8.4 at both ends of the upper pressure roller 8.4, guide grooves 8.5 corresponding to the guide blocks 8.4 in the supports 8.4, limiting strips 8.6 on both sides of the guide grooves 8.5, limiting grooves 8.7 corresponding to the limiting strips 8.6 on both sides of the guide blocks 8.4, and a pneumatic push rod 8.8 driving the movement of the guide blocks 8.4 on the upper side.

[0036] The pleating forming device 4 includes a frame 4.1, a lower forming frame 4.3 fixedly connected to the upper side of the frame 4.1, and an upper forming frame 4.10 that cooperates with the mounting post 4.2 at the end of the lower forming frame 4.3 to form uniform pleats on the fabric.

[0037] The lower forming frame 4.3 includes a first support rod 4.4 and a second support rod 4.5 arranged in parallel with unequal lengths. The length of the first support rod 4.4 is shorter than the length of the second support rod 4.5. An evenly distributed, upwardly protruding upper extrusion rod 4.6 is provided between the first support rod 4.4 and the second support rod 4.5, and the distance between adjacent upper extrusion rods 4.6 on the first support rod 4.4 is less than the distance on the second support rod 4.5. The upper forming frame 4.10 includes a third support rod 4.7 and a fourth support rod 4.8 arranged in parallel with unequal lengths. The length of the third support rod 4.7 is shorter than the length of the fourth support rod 4.8. An evenly distributed, downwardly protruding lower extrusion rod 4.9 is provided between the third support rod 4.7 and the fourth support rod 4.8, and the distance between adjacent lower extrusion rods 4.9 on the third support rod 4.7 is less than the distance on the fourth support rod 4.8. The upper extrusion rods 4.6 and the lower extrusion rods 4.9 are staggered.

[0038] The third support rod 4.7 and the fourth support rod 4.8 are provided with limiting holes 1 at their ends, which are corresponding to the mounting post 4.2. The limiting holes 1 are open holes.

[0039] The mounting post 4.2 has external threads on its surface, and the mounting post 4.2 is used to fix the third support rod 4.7 and the fourth support rod 4.8 with nuts.

[0040] The single-sided hot-drying equipment 9 includes a support 5, in which multiple sets of hot-drying rollers 6 are arranged vertically, and a reversing roller 7 is provided on one side of each set of hot-drying rollers 6.

[0041] The ironing roller 6 is an electric heating roller or a steam ironing roller.

[0042] In traditional pad-dyeing and drying processes, dye migration is generally considered a detrimental factor affecting dyeing quality. Migration refers to the phenomenon where dye migrates from the fiber interior to the fabric surface as water evaporates during the drying process after padding in dye liquor. This easily leads to quality problems such as uneven color distribution, left-right color differences, and streaks. Therefore, existing technologies typically focus on suppressing or eliminating migration by reducing the padding rate, using infrared pre-drying, and adding anti-migration agents to ensure dyeing uniformity. This application utilizes the migration phenomenon to prepare a fabric with a flowing stripe structure and natural color. The leveling machine, dye bath, washing tank, and drying and setting machine used in this application all employ existing equipment. Through process and equipment adjustments, this application achieves a smooth and natural light and dark stripe texture on the fabric surface, with a gradient transition effect at the stripe boundaries resembling ink wash. The fabric also has a soft hand feel and good color fastness, meeting the quality requirements for high-end clothing and decorative fabrics. Specifically, the process includes the following steps: the fabric is first guided into the leveling device by guide rollers to eliminate creases and curling edges, ensuring a smooth fabric surface. The leveled fabric is continuously fed into the dye bath via guide rollers. The dye bath contains prepared reactive dye solution, allowing the fabric fibers to fully saturate and absorb the dye. The remaining dye solution in the fabric is then controlled by a roller 8. Specifically, the gap between the upper pressure roller 8.3 and the lower pressure roller 8.2 is controlled by a pneumatic push rod 8.8 to adjust the extrusion effect. A collection box is located under the lower pressure roller to collect the extruded dye solution. The movable end of the pneumatic push rod 8.8 is fixedly connected to a guide block 8.4. The guide block 8.4 moves vertically within the guide groove 8.4 through the cooperation of the limiting groove 8.7 and the limiting strip 8.6. Next, the fabric enters the pleating device 4. Pulled by the front equipment, the fabric enters between the second support rod 4.5 and the fourth support rod 4.8, and moves towards the ends of the first support rod 4.4 and the third support rod 4.7. The fabric passes between the lower forming frame 4.3 and the upper forming frame 4.10. Under the staggered clamping and squeezing action of the upper extrusion rod 4.6 and the lower extrusion rod 4.9, the fabric is folded in the width direction to form continuous and uniformly deep pleats. Furthermore, the pleat depth can be adjusted by changing the distance between the lower forming frame 4.3 and the upper forming frame 4.10. This distance adjustment is achieved by placing shims or nuts on the mounting column 4.2 between the first support rod 4.4 and the third support rod 4.7, and between the second support rod 4.5 and the fourth support rod 4.8. The fabric then enters the single-sided ironing and drying equipment 9 for processing. The fabric always maintains only one side of its pleats in contact with the ironing rollers of the single-sided ironing and drying equipment. During the high-temperature drying process, the migration effect of dyes towards the contact surface due to heat causes the dye liquor to concentrate on the heated surface, thus creating a natural flowing water texture with alternating light and dark colors on the fabric. Specifically, during the high-temperature drying process, the moisture in the fabric evaporates due to heat, and the reactive dyes migrate with the moisture. Utilizing the migration effect of dyes towards the contact surface due to heat, the dye liquor concentrates on the heated surface (the front side), thus creating a natural flowing water texture with alternating light and dark colors along the width of the fabric after it is unfolded.Finally, the fabric is washed, dried, and shaped to obtain a striped dyed fabric with a natural flowing water texture.

Claims

1. A water-dyeing process for striped fabrics, characterized in that, Includes the following steps: S1. The fabric is flattened and rolled up, and then passed through the dye bath to fully immerse and absorb the dye solution, thus completing the uniform dyeing process. S2. After dyeing, the fabric is squeezed by a rolling mill to effectively remove excess liquid and provide a suitable amount of liquid for subsequent processes. S3. The fabric is physically pleated by a pleating device to form uniform and regular pleats. S4. Fabric with uniform pleats is fed into a single-sided ironing and drying equipment for ironing and drying treatment, and only one side of the fabric pleats is in contact with the ironing roller of the single-sided ironing and drying equipment. During the high-temperature drying process, the migration effect of dyes migrating to the contact surface when heated is utilized to promote the enrichment of dye liquor to the heated surface, thereby forming a natural flowing water texture with alternating light and dark colors on the fabric. S5. Wash the fabric and then dry and shape it.

2. The preparation apparatus for a striped fabric water-dyeing process according to claim 1, comprising a leveling machine, a dye tank, a rolling mill (8), a pleating forming device (4), a single-sided ironing and drying equipment (9), a washing tank, and a drying and setting machine arranged sequentially, characterized in that, The rolling mill (8) includes supports located at both ends. 8.1) A fixed lower pressure roller (8.2) is provided between the support (8.1). An upper pressure roller (8.3) that can be raised and lowered relative to the lower pressure roller (8.2) is provided on the upper side of the lower pressure roller (8.2). Guide blocks (8.4) are provided at both ends of the upper pressure roller (8.3). A guide groove (8.5) corresponding to the guide block (8.4) is provided in the support (8.4). Limiting strips (8.6) are provided on both sides of the guide groove (8.5). Limiting grooves (8.7) corresponding to the limiting strips (8.6) are provided on both sides of the guide block (8.4). A pneumatic push rod (8.8) for driving the guide block (8.4) to move is provided on the upper side of the guide block (8.4).

3. The apparatus for preparing striped fabric using a water-based dyeing process according to claim 2, characterized in that, The pleating forming device (4) includes a frame (4.1), a lower forming frame (4.3) fixedly connected to the upper side of the frame (4.1), and an upper forming frame (4.10) that cooperates with the mounting column (4.2) at the end to form uniform pleats on the fabric.

4. The apparatus for preparing striped fabric using a water-based dyeing process according to claim 3, characterized in that: The lower forming frame (4.3) includes a first support rod (4.4) and a second support rod (4.5) arranged in parallel with unequal lengths. The length of the first support rod (4.4) is shorter than the length of the second support rod (4.5). Evenly distributed and upwardly protruding upper extrusion rods (4.6) are provided between the first support rod (4.4) and the second support rod (4.5), and the distance between adjacent upper extrusion rods (4.6) on the first support rod (4.4) is smaller than the distance on the second support rod (4.5). The upper forming frame (4.10) The device includes a third support rod (4.7) and a fourth support rod (4.8) arranged in parallel and of unequal length. The length of the third support rod (4.7) is less than the length of the fourth support rod (4.8). There are uniformly distributed and downwardly protruding lower extrusion rods (4.9) between the third support rod (4.7) and the fourth support rod (4.8). The distance between adjacent lower extrusion rods (4.9) on the third support rod (4.7) is less than the distance on the fourth support rod (4.8). The upper extrusion rod (4.6) and the lower extrusion rod (4.9) are staggered.

5. The apparatus for preparing striped fabric using a water-based dyeing process according to claim 4, characterized in that: The third support rod (4.7) and the fourth support rod (4.8) are provided with limiting holes (1) corresponding to the mounting post (4.2) at their ends. The limiting holes (1) are open holes.

6. The apparatus for preparing striped fabric using a water-based dyeing process according to claim 3, characterized in that, The mounting post (4.2) has external threads on its surface, and the mounting post (4.2) is used to fix the third support rod (4.7) and the fourth support rod (4.8) with nuts.

7. The apparatus for preparing striped fabric using a water-based dyeing process according to claim 2, characterized in that: The single-sided hot-drying equipment (9) includes a support (5), in which multiple sets of hot rollers (6) are arranged vertically, and a reversing roller (7) is provided on one side of each set of hot rollers (6).

8. The apparatus for preparing striped fabric by water dyeing process according to claim 7, characterized in that: The ironing roller (6) is an electric heating roller or a steam heating roller.

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