Color-migration-resistant suede and preparation method thereof

Abstract

The invention relates to color-migration-resistant micro suede and a preparation method thereof. The color-migration-resistant micro suede comprises a bottom layer and a surface layer attached to the bottom layer, wherein the surface layer is soaked with material colors, and the material color amount is reduced from the surface close to the bottom layer to the surface far away from the bottom layer; the bottom layer is soaked with a bottom color which is overlapped with the material color; a color migration-resistant auxiliary agent is added into the pigment of the material color and the ground color; an adhesive layer and burrs are formed on the surface, close to the bottom layer, of the surface layer, the adhesive layer adheres to the bottom layer, and the burrs make contact with the bottom layer; the bottom layer is coated with primer, and the primer covers the burrs. The problems that in an existing scheme, the effect of a color migration-resistant auxiliary agent of the suede is attenuated, migration occurs, and the amount of a dyeing solvent in the suede is large, so that color migration is aggravated are solved.

Description

Technical Field

[0001] This invention relates to the field of imitation suede, and more particularly to a color migration resistant imitation suede and its preparation method. Background Technology

[0002] Imitation suede is produced through a process of immersion in a dyeing solvent, followed by pre-dyeing, dyeing, and fabric removal. To prevent color migration, color migration-resistant agents are added to the dyeing solvent. However, after prolonged use, the effectiveness of these agents diminishes, and color migration still occurs. Furthermore, the large amount of dyeing solvent used in imitation suede exacerbates this color migration.

[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of this invention is to provide a color migration resistant imitation suede and its preparation method, so as to solve the problems in the prior art where the efficacy of the color migration resistant additives in imitation suede decays and migration occurs, and the large amount of dyeing solvent in imitation suede aggravates color migration.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows: A color-migration resistant suede-like material; It includes: a base layer and a top layer adhered to the base layer; wherein, the top layer is impregnated with a pigment, the amount of pigment decreasing from the side closer to the base layer to the side farther away from the base layer; the base layer is impregnated with a base color, the base color overlapping the pigment; and color migration resistance additives are added to the pigments of the pigment and the base color. An adhesive layer and burrs are formed on the side of the surface layer near the bottom layer. The adhesive layer adheres to the bottom layer, and the burrs contact the bottom layer. A base coat is applied to the bottom layer, and the base coat covers the burrs.

[0006] A further technical solution is to form control colors arranged at a preset density on a background color; wherein, when the background color is white, the control color is black; and when the background color is black, the control color is white.

[0007] A further technical solution is that the bottom layer is pressed onto the adhesive layer; a portion of the burrs bends and abuts one side of the bottom layer; another portion of the burrs passes through the pores of the bottom layer and bends and abuts the other side of the bottom layer.

[0008] A further technical solution is that, after the adhesive layer is compressed, it extends and fills the pores of the bottom layer and the top layer.

[0009] A method for preparing color-migration resistant suede includes the following steps: Dipping process: The surface layer is immersed in the color solution, then squeezed and repeated several times, and then baked; a cleaning solution is sprayed onto one side of the surface layer, the surface layer is squeezed and dried; Abrasive steps: Grind the other side of the surface layer to form burrs and spray an adhesive solution to form an adhesive layer; Application steps: Immerse the base layer in the base color solution, remove the base layer, squeeze it for the first time and dry it; apply the control color to one side of the base layer at the preset density, and dry the base layer again; Bonding steps: Apply adhesive to one side of the bottom layer, roll it on for the first time, and dry it; apply base adhesive to the other side of the bottom layer, roll it on for the second time, and dry it.

[0010] A further technical solution is that the impregnation step includes several immersion and extrusion processes; wherein, the temperature of the color solution decreases from high to low in each process; the immersion time of the surface layer in the color solution decreases from long to short; and the number of processes corresponds to the depth of the color. The surface drying process in the impregnation step includes: baking the surface to a first preset temperature and then letting it cool naturally to room temperature; baking the surface to a second preset temperature and then letting it air cool to room temperature.

[0011] A further technical solution is that the impregnation step includes spraying cleaning liquid onto one side of the surface layer several times; wherein the spraying pressure gradually decreases along the moving direction of the surface layer; and the spraying volume of cleaning liquid gradually increases.

[0012] A further technical solution is that the impregnation step includes spraying cleaning liquid onto one side of the surface layer several times; wherein the spraying pressure alternately increases or decreases along the moving direction of the surface layer; and the cleaning liquid acts on both the inside and one side of the surface layer.

[0013] The further technical solution is as follows: Compared with the prior art, the beneficial technical effects of the present invention are as follows: (1) The imitation suede achieves color adjustment and displays the final color by influencing the material color with the base color. The surface layer is sparsely woven and the amount of material color used is small. At the same time, anti-migration additives are added to the material color and the base color, so that the amount of pigment migration is low. Since the amount of material color decreases from bottom to top, when migration occurs, the material color vector moves to a small position and will not migrate to the outside of the imitation suede.

[0014] (2) After being pressed, some of the burrs bend and the other part of the burrs pass through the pores of the bottom layer. After the adhesive layer solidifies, some of the burrs are distributed in the adhesive layer in a bent state, and some of the burrs play a role in strengthening the structure of the adhesive layer, so as to prevent the bending of the imitation suede from causing cracks in the adhesive layer. The other part of the burrs passes through the pores of the bottom layer and bends to touch the other side of the bottom layer. Apply the base adhesive to the bottom layer and roll it. After being pressed, the other part of the burrs bends. After the base adhesive solidifies, the other part of the burrs passes through the bottom layer and bends to hook the bottom layer, so that the base adhesive adheres to the bottom layer.

[0015] (3) The cleaning liquid cleans the material color. After the surface layer is squeezed, the cleaning liquid is discharged. One side of the surface layer can absorb more cleaning liquid due to its low humidity, which can clean the material color on the surface layer. Since the amount of cleaning liquid sprayed varies in the thickness direction of the surface layer, after cleaning, the amount of material color on the surface layer gradually decreases from the inside of the surface layer to the side of the surface layer.

[0016] (4) Because the surface layer is thin and the amount of colorant is less after washing, the surface layer cannot withstand a long baking temperature. This application reduces the baking time and temperature through two baking processes, and allows the moisture in the surface layer to penetrate to one side of the surface layer through the natural cooling process, so as to avoid the accumulation of moisture in the surface layer and avoid the baking time and temperature exceeding the surface layer's capacity.

[0017] (5) A first migration area and a second migration area are formed; the color of the surface layer migrates simultaneously to the first migration area and the second migration area, so the thickness of the second migration area can be thinner and will not affect the presentation of the color of the surface layer; the color of the surface layer covers the first migration area, and the first migration area will not weaken the presentation of the color of the surface layer, so that the imitation suede can accurately present the color. Attached Figure Description

[0018] Figure 1 A partial cross-sectional schematic diagram of the suede-like material according to an embodiment of the present invention is shown.

[0019] Figure 2 A partial cross-sectional schematic diagram of the surface layer prepared according to the second embodiment of the present invention is shown.

[0020] Figure 3 A partial cross-sectional schematic diagram of the surface layer prepared according to the third embodiment of the present invention is shown.

[0021] Figure 4 A schematic diagram of the abrasive step in the second embodiment of the present invention is shown.

[0022] The following labels are used in the attached diagram: 1. Base layer; 11. Base adhesive; 2. Top layer; 201. Grinding roller; 202. Scraper; 203. Vibrator; 204. Spray gun; 205. First migration zone; 206. Second migration zone; 21. Adhesive layer; 22. Burr. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the device proposed by this invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of this invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, only for the purpose of conveniently and clearly illustrating the embodiments of this invention. Please refer to the accompanying drawings to make the objectives, features, and advantages of this invention more apparent and understandable. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and objectives achieved by this invention, should still fall within the scope of the technical content disclosed in this invention.

[0024] Figure 1 A partial cross-sectional schematic diagram of the suede-like material according to an embodiment of the present invention is shown. (Combined with...) Figure 1 As shown, the present invention discloses a color-migration resistant suede-like material.

[0025] The color-migration suede-like material comprises: a base layer 1 and a top layer 2 adhered to the base layer 1. The top layer 2 is impregnated with a dye, the amount of dye decreasing from the side closest to the base layer 1 towards the side furthest from the base layer 1. The base layer 1 is impregnated with a base color, which overlaps the dye.

[0026] The color of the faux suede is displayed through the overlapping of the material color and the base color. When the faux suede color is light, the base color is white. When the faux suede color is dark, the base color is black. The surface layer 2 has a sparse weave density to show the base color. The base color adjusts the material color, ultimately displaying the color of the faux suede. This reduces the amount of material color used on surface layer 2 and minimizes color migration without affecting the display of the faux suede color.

[0027] Color migration resistant agents are added to the pigments of the base color and the color pigment to reduce the amount of pigment migration. Based on this, the amount of color pigment decreases from bottom to top, and the amount of color pigment in the surface layer 2 is relatively large. When color pigment migration occurs, it migrates to the area with less color pigment and will not migrate to the outside of the imitation suede.

[0028] On the side of the top layer 2 closest to the bottom layer 1, an adhesive layer 21 and burrs 22 are formed. The adhesive layer 21 adheres to the bottom layer 1, and the burrs 22 contact the bottom layer 1. After the adhesive layer 21 solidifies, it fixes the burrs 22 and adheres the top layer 2 and the bottom layer 1 together. The burrs 22 are connected to the top layer 2, and the adhesive layer 21 is connected to the top layer 2 through the burrs 22, preventing the adhesive layer 21 from detaching from the top layer 2. The adhesive layer 21 is made of a transparent material to avoid obscuring the color of the base layer.

[0029] For example, the bottom layer 1 is a mesh fabric. When the burrs 22 come into contact with the bottom layer 1, some of the burrs 22 will penetrate into the pores of the bottom layer 1. The bottom surface of the bottom layer 1 is coated with a primer 11, which covers the burrs 22 and blocks the pores of the bottom layer 1. After the primer 11 solidifies, the burrs 22 are firmly connected to the bottom layer 1.

[0030] The imitation suede achieves its final color through the influence of the base color on the pigment color. The surface layer 2 is sparsely woven, requiring a small amount of pigment. Simultaneously, anti-migration agents are added to both the pigment and base color, resulting in low pigment migration. Because the amount of pigment decreases from bottom to top, when migration occurs, the pigment migrates to a minimal location and does not migrate to the outside of the imitation suede.

[0031] Control colors are formed on a base color using a preset density. Specifically, when the base color is white, the control color is black to correspond to a lighter suede color. When the base color is black, the control color is white to correspond to a darker suede color. A higher control color density results in a darker suede color, while a lower density results in a lighter suede color. By adjusting the density of the control colors, the color of the suede can be adjusted, achieving accurate color reproduction.

[0032] The base layer 1 is pressed onto the adhesive layer 21. Some of the burrs 22 bend and touch one side of the base layer 1. After the adhesive layer 21 is applied to the top layer 2, the base layer 1 is adhered to the adhesive layer 21 and rolled. Under pressure, some of the burrs 22 bend, while others pass through the pores of the base layer 1. After the adhesive layer 21 solidifies, some of the burrs 22 are distributed in a bent state within the adhesive layer 21, while others serve to reinforce the structure of the adhesive layer 21, preventing cracks from forming in the adhesive layer 21 due to the bending of the suede-like material.

[0033] Another part of the burrs 22 passes through the pores of the base layer 1 and bends to abut against the other side of the base layer 1. The base layer 11 is coated with primer 11 and rolled. After being pressed, the other part of the burrs 22 bends. After the primer 11 solidifies, the other part of the burrs 22 passes through the base layer 1 and bends to hook onto the base layer 1, so that the primer 11 adheres closely to the base layer 1.

[0034] When the adhesive layer 21 is compressed, it extends and fills the pores of the bottom layer 1 and the top layer 2, thus connecting the bottom layer 1 and the top layer 2 respectively. This prevents the bottom layer 1, the top layer 2, and the adhesive layer 21 from separating. Because the top layer 2 is thinner and has larger pores, and because the adhesive layer 21 is transparent, the base color can be reflected onto the top layer 2 through the adhesive layer 21, and the color is displayed under the overlapping effect of the material color and the base color.

[0035] Second embodiment: Figure 2 A partial cross-sectional schematic diagram of the surface layer prepared according to the second embodiment of the present invention is shown. Figure 4 A schematic diagram of the structure in the abrasive step of the second embodiment of the present invention is shown. (Combined with...) Figure 1, Figure 2 and Figure 4 As shown, the preparation method of color migration resistant suede includes the following steps: Dipping process: After immersing surface layer 2 in the color solution, press and repeat several times, then bake. Spray cleaning solution onto one side of surface layer 2, press and dry surface layer 2.

[0036] The impregnation process includes several immersion and extrusion steps. During each step, the temperature of the color solution decreases from high to low. The temperature of the color solution is higher during the initial immersion of surface layer 2, and gradually decreases during repeated immersions. The immersion time of surface layer 2 in the color solution also decreases from long to short. The immersion time is longer during the initial immersion of surface layer 2, and gradually shortens during repeated immersions.

[0037] During the initial immersion, the colorant solution is at a relatively high temperature, and the surface layer 2 is immersed in the colorant solution for a longer time, allowing the colorant to easily penetrate into the surface layer 2, resulting in good adhesion. In subsequent immersion processes, the colorant gradually becomes unable to penetrate into the surface layer 2, eventually only penetrating the surface, and its adhesion gradually weakens.

[0038] The number of processing steps corresponds to the depth of color in the material. More processing steps result in a darker color, while fewer processing steps result in a lighter color. The depth of color can be adjusted by controlling the number of processing steps.

[0039] After repeating the immersion and extrusion process several times, surface layer 2 is baked. The baking heat acts on one side of surface layer 2, and the baking time is relatively short, so one side of surface layer 2 is dried. The humidity of surface layer 2 varies along its thickness. The outer surface of surface layer 2 has lower humidity due to baking, while the inner surface of surface layer 2 has higher humidity due to the shorter baking time.

[0040] The impregnation process includes several sprayings of cleaning fluid onto one side of surface layer 2. The spraying pressure gradually decreases along the moving direction of surface layer 2, while the spray volume gradually increases.

[0041] Several nozzles are arranged side-by-side above surface layer 2. As surface layer 2 moves, the nozzles spray cleaning fluid onto one side of surface layer 2. Due to differences in spray pressure and volume, the cleaning fluid acts three-dimensionally on one side of surface layer 2. By using different spray pressures and volumes, the cleaning fluid penetrates to different depths in surface layer 2.

[0042] The cleaning solution removes the material color. After the surface layer 2 is squeezed, the cleaning solution is discharged. Because the surface layer 2 has low humidity, it can absorb more cleaning solution, thus cleaning the material color on that side of the surface layer 2. Due to the difference in the amount of cleaning solution sprayed in the thickness direction of the surface layer 2, after cleaning, the amount of material color distributed on the surface layer 2 gradually decreases from the inside of the surface layer 2 to one side.

[0043] Surface layer 2 is dried. Surface layer 2 is baked once to a first preset temperature and then naturally cooled to room temperature. Surface layer 2 is baked a second time to a second preset temperature and then air-cooled to room temperature. The first preset temperature is lower than the second preset temperature, and the first baking time of surface layer 2 is longer than the second baking time.

[0044] The first baking of layer 2 takes a long time and at a low temperature, resulting in one side of layer 2 drying while the inside remains undried. During the natural cooling process of layer 2, moisture from the inside of layer 2 permeates to one side. At this point, layer 2 undergoes a second baking, using a higher baking temperature and a shorter baking time to completely dry it.

[0045] Because the surface layer 2 is relatively thin, and the amount of colorant distributed on the surface layer 2 after washing is small, the surface layer 2 cannot withstand a long baking temperature. This application reduces the baking time and temperature by using two baking processes, and allows moisture inside the surface layer 2 to permeate and transition to one side of the surface layer 2 through a natural cooling process, avoiding moisture accumulation inside the surface layer 2 and preventing the baking time and temperature from exceeding the surface layer 2's tolerance.

[0046] Abrasive steps: Grind the other side of surface layer 2 to form burrs 22 and spray an adhesive solution to form an adhesive layer 21.

[0047] Grinding roller 201, scraper 202 and spray gun 204 are arranged along the moving direction of the opposite layer 2, and the grinding roller 201, scraper 202 and spray gun 204 are located above the surface layer 2.

[0048] The grinding roller 201 contacts the other side of the surface layer 2 to grind it. After grinding, burrs 22 are formed. Some of the burrs 22 are separated from the surface layer 2, and the other part of the burrs 22 are connected to the surface layer 2.

[0049] The scraper 202 is tilted towards the surface layer 2 at one end, and the scraper 202 contacts the surface layer 2 at the other end. The scraper 202 is connected to the vibrator 203, and the vibrator 203 drives the scraper 202 to vibrate. The scraper 202 frequently contacts the surface layer 2 and applies a vibration force to the surface layer 2.

[0050] Another portion of the burrs 22 contacts the scraper 202, and the surface layer 2 continues to move. The scraper 202 bends the other portion of the burrs 22, making the other portion of the burrs 22 nearly perpendicular to the surface layer 2. The vibration of the scraper 202 causes some of the burrs 22 to disperse on the surface layer 2.

[0051] The nozzle of the spray gun 204 faces the surface layer 2, and the spraying range covers the other side of the surface layer 2. After the spray gun 204 sprays the glue, it forms an adhesive layer 21, which covers the burrs 22.

[0052] Application steps: Immerse base coat 1 in the base color solution, remove base coat 1, squeeze and dry it for the first time. Immerse base coat 1 in the base color solution for a relatively long time, squeeze it between multiple sets of rollers, and then dry it for a relatively long time to ensure it is thoroughly dried. Apply control color to one side of base coat 1 at a preset density, and then dry base coat 1 for a relatively short time to dry the control color.

[0053] Bonding Steps: The bottom layer 1 is placed on one side of the adhesive layer 21 and rolled and dried for the first time. The bottom layer 1 is wrapped around a feeding roller, which rotates to feed material, covering one side of the bottom layer 1 onto the adhesive layer 21. The bottom layer 1 and the top layer 2 are pressed together by multiple sets of rolling rollers. During the pressing process, some burrs 22 are pressed into contact with the top layer 2, while other burrs 22 pass through the gaps in the top layer 2 and bend. Afterward, the bottom layer 1 and the top layer 2 are moved into an oven to dry, at which point the adhesive layer 21 is dried and solidified. The compression of the adhesive layer 21 blocks the pores of the bottom layer 1 and the top layer 2, strengthening the connection between the adhesive layer 21 and the bottom layer 1 and the top layer 2, and preventing the bottom layer 1, the top layer 2 and the adhesive layer 21 from separating.

[0054] Because the adhesive layer 21 is transparent, the base color can penetrate the adhesive layer 21 and the pores of the surface layer 2, allowing the base color to be reflected on the surface layer 2. The color is displayed by the overlap of the base color and the material color. The adhesive layer 21 blocks the pores of the bottom layer 1, and after the adhesive layer 21 solidifies, it restricts the burrs 22 in another part.

[0055] Apply primer 11 to the other side of the base layer 1, roll it a second time, and dry it. The color of primer 11 is the same as the base color. Primer 11 completely covers the other side of the base layer 1. Through the extrusion of multiple sets of rolling rollers, primer 11 completely covers the pores of the base layer 1, the other side of the base layer 1, and another part of the burrs 22.

[0056] Third embodiment: Figure 3 A partial cross-sectional schematic diagram of the surface layer prepared according to the third embodiment of the present invention is shown. (In conjunction with...) Figures 1-4 As shown, the impregnation step includes several sprays of cleaning fluid onto one side of the surface layer 2. The spraying pressure alternately increases and decreases along the moving direction of the surface layer 2. The cleaning fluid acts on one side of the surface layer 2, and some of the cleaning fluid penetrates into the surface layer 2.

[0057] Several nozzles are arranged side by side above the surface layer 2. As the surface layer 2 moves, the nozzles spray cleaning fluid onto one side of the surface layer 2. The nozzles include high-pressure spray and low-pressure spray. Due to the difference in the spray pressure of the cleaning fluid, the cleaning fluid acts three-dimensionally on one side of the surface layer 2, allowing the cleaning fluid to penetrate into different depths of the surface layer 2.

[0058] The cleaning solution cleans the material color. After the surface layer 2 is squeezed, the cleaning solution is discharged. Because the surface layer 2 has low humidity, it can absorb more cleaning solution, which can clean the material color on the surface layer 2.

[0059] The amount of cleaning fluid penetrating at different depths in surface layer 2 varies, and the amount of cleaning fluid sprayed inside surface layer 2 is greater than the amount of cleaning fluid sprayed on one side of surface layer 2.

[0060] After the surface layer 2 is pressed and baked, a first migration region 205 is formed within the surface layer 2, and a second migration region 206 is formed on one side of the surface layer 2. Due to the large amount of cleaning liquid sprayed into the surface layer 2, the thickness of the first migration region 205 is greater than the thickness of the second migration region 206. When color migration occurs, the color inside the surface layer 2 migrates towards the first migration region 205, and the color on one side of the surface layer 2 migrates towards the second migration region 206. The color does not migrate to the outside of the imitation suede.

[0061] In the preparation of the second embodiment, the amount of pigment gradually decreases linearly from bottom to top, which results in a lighter color effect. This can be compensated for by increasing or decreasing the coating density in subsequent coating steps. However, this will cause inaccurate color rendering of the suede-like material.

[0062] The faux suede prepared in this process forms a first migration region 205 and a second migration region 206. The fabric color of the surface layer 2 migrates simultaneously to both the first and second migration regions 205 and 206. Therefore, the thickness of the second migration region 206 can be relatively thin without affecting the presentation of the fabric color of the surface layer 2. The fabric color of the surface layer 2 masks the first migration region 205, and the first migration region 205 does not weaken the presentation of the fabric color of the surface layer 2, allowing the faux suede to accurately display its color.

[0063] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A color migration-resistant suede-like material, characterized in that, include: A base layer (1) and a top layer (2) adhered to the base layer (1); wherein the top layer (2) is impregnated with a pigment, the amount of pigment decreasing from the side near the base layer (1) to the side away from the base layer (1); the base layer (1) is impregnated with a base color, the base color overlapping the pigment; a color migration resistant agent is added to the pigments of the pigment and the base color; an adhesive layer (21) and burrs (22) are formed on the side of the top layer (2) near the base layer (1), the adhesive layer (21) adhering to the base layer (1), the burrs (22) contacting the base layer (1); a base coat (11) is applied to the base layer (1), the base coat (11) covering the burrs (22).

2. The color-migration resistant suede-like material as described in claim 1, characterized in that, A control color is formed on the background color, arranged at a preset density; wherein, when the background color is white, the control color is black; when the background color is black, the control color is white.

3. The color-migration resistant suede-like material as described in claim 2, characterized in that, The bottom layer (1) is pressed onto the adhesive layer (21); a portion of the burrs (22) bend and abut against one side of the bottom layer (1); another portion of the burrs (22) pass through the pores of the bottom layer (1) and bend and abut against the other side of the bottom layer (1).

4. The color-migration resistant suede-like material as described in claim 3, characterized in that, When the adhesive layer (21) is compressed, it extends and fills the pores of the bottom layer (1) and the top layer (2).

5. A method for preparing color-migration resistant suede, characterized in that, Includes the following steps: Dipping steps: After dipping the surface layer (2) into the color solution, squeeze and repeat several times, then bake; spray cleaning liquid onto one side of the surface layer (2), squeeze and dry the surface layer (2); Abrasive steps: Grind the surface layer (2) to form burrs on the other side (22) and spray an adhesive solution to form an adhesive layer (21); Application steps: Immerse the base layer (1) in the base color solution, remove the base layer (1), squeeze and dry it for the first time; apply the control color to one side of the base layer (1) at the preset density, and dry the base layer (1) again; Bonding steps: Cover one side of the bottom layer (1) with the adhesive layer (21) and roll and dry for the first time; apply the base adhesive (11) to the other side of the bottom layer (1) and roll and dry for the second time.

6. The method for preparing color-migration resistant suede as described in claim 5, characterized in that, The impregnation process includes several immersion and extrusion processes; in each process, the temperature of the color solution decreases from high to low; the immersion time of the surface layer (2) in the color solution decreases from long to short; the number of processes corresponds to the depth of the color. The drying of the surface layer (2) in the impregnation step includes: baking the surface layer (2) once to a first preset temperature, and then naturally cooling the surface layer (2) to room temperature; baking the surface layer (2) a second time to a second preset temperature, and then air-cooling the surface layer (2) to room temperature.

7. The method for preparing color-migration resistant suede as described in claim 6, characterized in that, The impregnation process includes several sprayings of cleaning fluid onto one side of the surface layer (2); wherein the spraying pressure gradually decreases along the moving direction of the surface layer (2); and the amount of cleaning fluid sprayed gradually increases.

8. The method for preparing color-migration resistant suede as described in claim 6, characterized in that, The impregnation process includes spraying cleaning liquid onto one side of the surface layer (2) several times; wherein the spraying pressure alternately increases or decreases along the moving direction of the surface layer (2); the cleaning liquid acts on one side of the surface layer (2), and some of the cleaning liquid penetrates into the surface layer (2).

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