TWI811654B - Double-sided uniformly dyeing method for textile and colorful yarn manufactured thereby - Google Patents

Abstract

A double-sided uniformly dyeing method for textile includes the following steps. Performing a dye-covering step which includes covering a dispersing dye on a first surface of a substrate to be dyed. Performing a dye-fixing step which includes utilizing a supercritical fluid to make the dispersing dye covering on the first surface diffuse to a second surface of the substrate to be dyed, in which the second surface is facing away from the first surface.

Description

Double-sided leveling dyeing method for textiles and colorful yarns produced using it

The present disclosure relates to a dyeing method for textiles and yarns produced using the dyeing method, and in particular, to a double-sided level dyeing method for textiles and colorful yarns produced using the dyeing method.

Supercritical fluid dyeing is a technology that has attracted much attention in today's dyeing process. Generally speaking, when the temperature and pressure of a substance exceed the critical temperature and critical pressure, it will enter the state of supercritical fluid. Different substances have different chemical properties after forming a supercritical fluid. For example, carbon dioxide can increase its lipophilicity after entering a supercritical fluid state, thereby having the ability to dissolve organic matter. In recent years, textile manufacturers often dye fiber materials by dissolving non-polar dyes in supercritical carbon dioxide, thereby coloring fiber materials.

However, since the solubility of non-polar dyes in supercritical carbon dioxide is not very good, in order to promote better dissolution of non-polar dyes in supercritical carbon dioxide, it is often necessary to greatly increase the contact area between the non-polar dyes and supercritical carbon dioxide. Therefore, non-polar dyes and supercritical carbon dioxide need to be filled in the entire dyeing container (such as a dye vat) for a long time, which not only results in excessive dye usage and energy consumption, but also causes the dye vat to be contaminated and difficult to clean. On the other hand, in order to avoid color difference during the dyeing process, it is often necessary to strictly control the fluidity of non-polar dyes and supercritical carbon dioxide in the dye vat, and to avoid agglomeration and aggregation of non-polar dyes, making the dyeing process cumbersome and complicated. Therefore, how to provide a textile dyeing method that can improve the convenience of the dyeing process, shorten the dyeing process time and improve the uniformity of dyeing is a problem that industry players in this field are actively solving.

This disclosure provides a double-sided leveling dyeing method for textiles and colorful yarns manufactured using the same. The double-sided leveling dyeing method for textiles can effectively shorten the dyeing process time, save dye usage and energy consumption, and improve the quality of textiles. Double-sided level dyeing allows the colorful yarns made with it to have multiple color sections, and each color section can have a single and uniform color.

According to some embodiments of the present disclosure, a double-sided level dyeing method of textiles includes the following steps. A dye coating step is performed, which includes coating the disperse dye on the first surface of the base material to be dyed. A dye fixing step is performed, which includes using a supercritical fluid to diffuse the disperse dye coated on the first surface to a second surface of the substrate to be dyed, where the second surface is opposite to the first surface.

In some embodiments of the present disclosure, the dye coating step is a suction step, a coating step, a spraying step, an inkjet step, or a combination thereof.

In some embodiments of the present disclosure, the base material to be dyed is knitted fabric, and the basis weight of the knitted fabric is between 120g/ ^m2 and 180g/ ^m2 .

In some embodiments of the present disclosure, the base material to be dyed is woven fabric, and the basis weight of the woven fabric is between 40g/ ^m2 and 180g/ ^m2 .

In some embodiments of the present disclosure, the base material to be dyed is leather, and the basis weight of the leather is between 250g/ ^m2 and 290g/ ^m2 .

In some embodiments of the present disclosure, the dye fixing step is performed under a pressure of 185 kg/cm ² to 320 kg/cm ² .

In some embodiments of the present disclosure, the supercritical fluid includes supercritical carbon dioxide, and the density of the supercritical fluid is between 0.505g/cm ³ and 0.686g/cm ³ .

In some embodiments of the present disclosure, when a spectrometer is used to measure the CMC color difference value ΔE of the textile, the CMC color difference value ΔE of the first surface and the second surface of the textile is less than 0.8.

According to some embodiments of the present disclosure, a colorful yarn is manufactured by a manufacturing method including the following steps. The double-sided leveling dyeing step includes using the aforementioned double-sided leveling dyeing method of textiles to dye the base material to be dyed to obtain textiles. The textile is subjected to the unweaving step to obtain colorful yarns.

In some embodiments of the present disclosure, the material of the colorful yarn includes polyester, hot-melt polyurethane, ethylene-vinyl alcohol copolymer, or combinations thereof.

According to the above embodiments of the present disclosure, in the double-sided leveling dyeing method of textiles, after the disperse dye is coated on one of the surfaces (ie, the first surface) of the base material to be dyed, it is further dyed by a supercritical fluid. It is guided and diffused to the other surface of the substrate to be dyed (i.e. the second surface), so it can effectively shorten the dyeing process time, save dye usage and energy consumption, and improve the double-sided dyeing of textiles. On the other hand, since the colorful yarn is made by using the aforementioned double-sided leveling dyeing method for textiles, the base material to be dyed is first subjected to a double-sided leveling step to form a textile, and after the double-sided leveling step, the textile is dewoven. Therefore, it can improve the convenience of the dyeing process and ensure that the color of each color section of the multi-colored yarn is single and uniform.

A plurality of implementation manners of the present disclosure will be disclosed below in figures. For the purpose of clear explanation, many practical details will be explained together in the following description. However, it should be understood that these practical details should not be used to limit the disclosure. That is to say, in some implementations of the disclosure, these practical details are not necessary and therefore should not be used to limit the disclosure. In addition, for the sake of simplifying the drawings, some commonly used structures and components will be illustrated in a simple schematic manner in the drawings. In addition, for the convenience of readers, the dimensions of each element in the drawings are not drawn according to actual proportions.

Unless otherwise defined, all terms used herein have the same meanings as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms such as those defined in commonly used dictionaries should be construed to have meanings consistent with their meanings in the context of the relevant technology and the present invention, and are not to be construed as idealistic or excessive Formal meaning, unless expressly defined as such herein.

This disclosure provides a double-sided level dyeing method for textiles and colorful yarns manufactured using the method. Since in the double-sided leveling dyeing method of textiles, the disperse dye is coated on one surface of the base material to be dyed and then further diffused to the other surface of the base material to be dyed through the guidance of the supercritical fluid, Therefore, it can effectively shorten the dyeing process time, save dye usage and energy consumption, and improve the double-sided dyeing properties of textiles. On the other hand, the colorful yarns produced using the double-sided level dyeing method of textiles of the present disclosure can have multiple color sections, and each color section can have a single and uniform color.

Please refer to Figure 1 , which illustrates a flow chart of a double-sided level dyeing method for textiles according to some embodiments of the present disclosure. The double-sided leveling dyeing method of textiles includes step S10 and step S20. In step S10, a dye coating step is performed, which includes coating the disperse dye on the first surface of the base material to be dyed. In step S20, a dye fixing step is performed, which includes using a supercritical fluid to diffuse the disperse dye coated on the first surface to the second surface of the base material to be dyed. In the following description, the above steps will be further explained through the contents of Figures 2A to 2C.

First, in step S10, a dye coating step is performed. Please refer to Figure 2A, which illustrates a schematic diagram of the dye coating step in Figure 1. In step S10 , the dye coating step includes coating the disperse dye 110 on the first surface 122 of the base material 120 to be dyed. In some embodiments, the disperse dye 110 may be an level dyeing type (E type) dye, a semi-level dyeing type dye (SE type), a high fastness type dye (S/SF type) or a combination thereof, thereby providing a dyeing process. Diverse applicability. In some embodiments, the type of the substrate 120 to be dyed may include knitted fabric, woven fabric, leather or a combination thereof, and the material of the substrate 120 to be dyed may include polyester, thermoplastic polyurethane (TPU). , ethylene vinyl alcohol copolymer (EVOH) or combinations thereof, thereby providing diverse applicability in the dyeing process. In some embodiments, different types of substrates 120 to be dyed may have different basis weights. Specifically, when the type of base material 120 to be dyed is knitted fabric, the basis weight of the knitted fabric may be between 120g/m ² and 180g/m ² ; when the type of base material 120 to be dyed is woven fabric , the basis weight of the woven fabric can be between 40g/ ^m2 and 180g/ ^m2 ; when the type of base material 120 to be dyed is leather, the basis weight of the leather can be between 250g/ ^m2 and 290g/ ^m2 between. Specifically, when the basis weights of various types of substrates 120 to be dyed fall outside the above respective ranges, the substrates 120 to be dyed require additional dyeing processes in order to achieve the effect of equal dyeing on both sides. It is worth mentioning that compared with traditional dyeing methods, the double-sided leveling dyeing method of textiles disclosed in the present disclosure is more suitable for leather that is more difficult to level dye. Compared with cloth, the surface of leather is smoother and the thickness is thicker. The material porosity is high and the material porosity is low, so it can be seen that the present disclosure can achieve good double-sided leveling effect.

In some embodiments, the dye coating step may be, for example, a suction step, a coating step, a spray step, an inkjet step, or a combination thereof. In other words, the disperse dye 110 can be coated on the first surface 122 of the base material 120 to be dyed through a pressing step, a coating step, a spraying step, an inkjet step or a combination thereof. Compared with the traditional initial contact between the dye and the substrate to be dyed through the assistance of solid beads and supercritical fluids, the dye coating step of the present disclosure is the first step to directly attach the disperse dye 110 to the substrate 120 to be dyed. The surface 122 allows the disperse dye 110 to make preliminary contact with the first surface 122 of the base material 120 to be dyed without the assistance of solid beads and supercritical fluids, thereby significantly reducing the dyeing process time. In some embodiments, if the substrate 120 to be dyed is to be processed locally, a coating step or an inkjet step may be performed, and if the substrate 120 to be dyed is to be processed in a large area, a suction step or a spraying step may be performed.

Next, in step S20, a dye fixing step is performed. Please refer to Figure 2B and Figure 2C, which illustrate the schematic diagram of the dye fixation step in Figure 1. In step S20, the dye fixing step includes using a supercritical fluid to diffuse the disperse dye 110 coated on the first surface 122 of the base material 120 to be dyed to the second surface 124 of the base material 120 to be dyed, wherein the second surface 124 and first surface 122 are opposite each other. By using a supercritical fluid to perform the dye fixing step, the disperse dye 110 that has initially contacted the first surface 122 of the base material 120 to be dyed can be further guided by the supercritical carbon dioxide to pass through the interior of the base material 120 to be dyed, Thereby, it diffuses to the second surface 124 of the substrate 120 to be dyed. In some embodiments, the supercritical fluid may include supercritical carbon dioxide. In some embodiments, the density of the supercritical fluid can be between 0.505g/ ^cm3 and 0.686g/ ^cm3 , so that the disperse dye 110 can be appropriately diffused from the first surface 122 of the substrate 120 to be dyed to the second surface 122 of the base material 120 to be dyed. Two surfaces 124 are formed, so that the formed textile 100 (please see Figure 2C) has good double-sided level dyeing properties. In detail, if the density of the supercritical fluid is less than 0.505g/cm ³ , the disperse dye 110 cannot easily diffuse to the second surface 124 of the base material 120 to be dyed, causing color difference in the textile 100 ; if the density of the supercritical fluid is greater than 0.686g /cm ³ , the stability of the supercritical fluid is poor and safety risks may exist.

In some embodiments, the temperature of the dye fixing step may range from 90°C to 120°C, and the time of the dye fixing step may range from 30 minutes to 60 minutes. The above-mentioned temperature and time can ensure that the disperse dye 110 is appropriately diffused during the dye fixing step, and ensures that the supercritical fluid generates appropriate pressure during the dye fixing step to facilitate the dye fixing step. In some embodiments, the dye fixing step may be performed, for example, under a pressure of 185 kg/cm ² to 320 kg/cm ² , so that the disperse dye 110 can achieve a good diffusion effect. It should be understood that the above-mentioned pressure may be the pressure generated by the supercritical fluid during the dye fixation step. If the above pressure is less than 185kg/cm ² , the density of the supercritical fluid may be too low, causing the disperse dye 110 to be difficult to diffuse, resulting in color difference in the textile 100 ; if the above pressure is greater than 320kg/cm ² , there may be safety risks. It is necessary to improve the pressure resistance of the dyeing container, which will increase the cost. In some embodiments, the dye fixing step may include fixing the dispersed disperse dye 110 so that the disperse dye 110 is firmly disposed on the first surface 122 and the second surface 124 of the base material 120 to be dyed.

After at least performing the above steps, the textile 100 of the present disclosure can be obtained. In the double-sided leveling dyeing method of the textile 100, after the disperse dye 110 is coated on the first surface 122 of the base material 120 to be dyed, it is further diffused to the base material 120 to be dyed through the guidance of the supercritical fluid. The second surface 124 can effectively shorten the dyeing process time, save dye usage and energy consumption, and improve the double-sided dyeing properties of the textile 100. In some embodiments, when a spectrometer is used to measure the CMC color difference value ΔE of the textile 100, the CMC color difference value ΔE of the first surface 102 and the second surface 104 of the textile 100 may be less than 0.8. Specifically, please refer to the description of the experimental examples below, which specifically verify the efficacy of the present disclosure through multiple comparative examples and multiple experimental examples. <Experimental example: Double-sided CMC color difference value ΔE test of single-color textiles>

In this experimental example, a spectrometer (model: data color 650) was used to test the double-sided CMC color difference value ΔE of different types of substrates to be dyed with an aperture of 30mm, D65 light source, and an angle of 10 degrees. The test method includes the following steps. First, the color value of a reference point (point A) is measured on the first surface of the base material to be dyed, and this is used as the reference value. Next, the color values of the other three points to be measured (point B, point C and point D) are randomly measured on the first surface of the base material to be dyed, and compared with the above-mentioned reference value, thereby obtaining point B, point C and the respective CMC color difference values ΔE of point D. Subsequently, three points to be measured (point E, point F and point G) are randomly measured on the second surface of the base material to be dyed, and compared with the above-mentioned reference values, thereby obtaining the respective points of point E, point F and point G. CMC color difference value ΔE. The detailed description of each comparative example in each embodiment is shown in Table 1, and the test results are shown in Table 2.

Table I Base material to be dyed disperse dyes Dye coating step Dye fixation step Type/Material Basis weight (g/m ² ) Whether to use supercritical fluids Supercritical fluid processing conditions Comparative example 1 Knitted fabric/PET 140 High fastness dye (yellow green) Inkjet steps no N/A Example 1 Yes (CO ₂ ) CO ₂ Density: 0.505g/cm ³ Temperature: 120℃ Pressure: 255kg/cm ² Time: 60 minutes Comparative example 2 Woven fabric/PET 100 High fastness dye (blue) Inkjet steps no N/A Example 2 Yes (CO ₂ ) CO ₂ Density: 0.505g/cm ³ Temperature: 120℃ Pressure: 255kg/cm ² Time: 60 minutes Comparative example 3 Woven fabric/PET 100 High fastness dye (yellow) Inkjet steps no N/A Example 3 Yes (CO ₂ ) CO ₂ Density: 0.505g/cm ³ Temperature: 120℃ Pressure: 255kg/cm ² Time: 60 minutes Example 4 leather 287 High fastness dye (reddish brown) Spraying steps Yes (CO ₂ ) CO ₂ Density: 0.507g/cm ³ Temperature: 120℃ Pressure: 195kg/cm ² Time: 30 minutes Example 5 Yes (CO ₂ ) CO ₂ Density: 0.550g/cm ³ Temperature: 120℃ Pressure: 230kg/cm ² Time: 60 minutes

Table II CMC color difference value ΔE first surface second surface Point B Point C Point D Point E Point F Point G Comparative example 1 0.63 0.51 0.18 14.40 13.61 14.58 Example 1 0.10 0.09 0.12 0.18 0.10 0.06 Comparative example 2 0.95 0.37 0.26 5.39 5.44 5.24 Example 2 0.07 0.15 0.09 0.15 0.17 0.05 Comparative example 3 0.97 0.09 0.38 6.97 6.93 6.52 Example 3 0.13 0.16 0.15 0.16 0.16 0.09 Example 4 0.77 0.59 0.59 0.75 0.53 0.69 Example 5 0.32 0.52 0.42 0.45 0.47 0.52

As shown in Table 1 and Table 2, compared with the comparative examples, the CMC color difference values ΔE of each point on the first surface and the second surface of the textiles of each embodiment are significantly smaller. More specifically, when the base material to be dyed is leather, the CMC color difference value ΔE is less than 0.8; and when the base material to be dyed is knitted fabric or woven fabric, the CMC color difference value ΔE can be less than 0.2. This shows Using the double-sided level dyeing method of textiles disclosed in the present invention can make textiles have good double-sided level dyeing properties.

In some embodiments, the double-sided level dyeing method of textiles can be further used to create colorful yarns. Please refer to Figure 3A and Figure 3B at the same time, which respectively illustrate a top view of the textile 100a and a three-dimensional view of the colorful yarn 200a according to some embodiments of the present disclosure. Specifically, the colorful yarn 200a can be obtained by performing an unweaving step on the textile 100a having multiple colors. In some embodiments, the preparation method of the colorful yarn 200a may include the following steps. First, a double-sided leveling step is performed, which includes dyeing the base material to be dyed using the aforementioned double-sided leveling method of textiles to obtain textiles 100a with multiple colors. Next, the textile 100a with multiple colors is subjected to an unweaving step, thereby obtaining multicolored yarns 200a. In some embodiments, the textile 100a may have multiple color blocks B, and each color block B may have a different color (represented by different dots in Figure 3A). In this way, the colorful yarn 200a formed by unweaving the textile 100a can have multiple color sections S, and each color section S can have different colors (represented by different dots in Figure 3B). In some embodiments, the material of the colorful yarn 200a may include polyester, hot-melt polyurethane, ethylene-vinyl alcohol copolymer, or combinations thereof.

After at least performing the above steps, the colorful yarn 200a of the present disclosure can be obtained. Since the colorful yarn 200a is obtained by using the aforementioned double-sided leveling dyeing method for textiles, the base material to be dyed is first subjected to a double-sided leveling step to form a textile 100a with multiple colors, and then the textile 100a with multiple colors is unwoven. It is therefore not necessary to dye each color section S of the yarn separately. Thereby, the convenience of the dyeing process can be improved, and the color of each color section S of the colorful yarn 200a can be ensured to be single and uniform.

Although the disclosure has been disclosed in the above embodiments, it is not intended to limit the disclosure. Anyone skilled in the art can make various changes and modifications without departing from the spirit and scope of the disclosure. Therefore, the protection of the disclosure The scope shall be determined by the appended patent application scope.

S10~S20: steps 100,100a: Textiles 102: First surface 104: Second surface 110: Disperse dyes 120: Base material to be dyed 122: First surface 124: Second surface 200a: Colorful yarn B: Color block S: color section

In order to make the above and other objects, features, advantages and embodiments of the present disclosure more obvious and understandable, the accompanying drawings are described as follows: Figure 1 illustrates a flow chart of a double-sided level dyeing method for textiles according to some embodiments of the present disclosure; Figure 2A shows a schematic diagram of the dye coating step in Figure 1; Figure 2B and Figure 2C are schematic diagrams of the dye fixation step in Figure 1; Figure 3A illustrates a schematic top view of a textile product according to some embodiments of the present disclosure; and Figure 3B illustrates a three-dimensional schematic diagram of colorful yarns according to some embodiments of the present disclosure.

Domestic storage information (please note in order of storage institution, date and number) without Overseas storage information (please note in order of storage country, institution, date, and number) without

S10~S20: steps

Claims (10)

A double-sided leveling dyeing method for textiles, including: a dye coating step, which includes coating a disperse dye on the first surface of a base material to be dyed; and a dye fixing step, which includes using a supercritical fluid to make the coating The disperse dye covering the first surface diffuses to the second surface of the substrate to be dyed, wherein the second surface is relative to the first surface, and the dye fixing step is performed on the The dye coating step is performed subsequent to, and the supercritical fluid is not used in, the dye coating step. The double-sided level dyeing method of textiles as claimed in claim 1, wherein the dye coating step is a suction step, a coating step, a spraying step, an inkjet step or a combination thereof. The double-sided leveling dyeing method of textiles as claimed in claim 1, wherein the base material to be dyed is knitted fabric, and the basis weight of the knitted fabric is between 120g/ ^m2 and 180g/ ^m2 . The double-sided level dyeing method of textiles as claimed in claim 1, wherein the base material to be dyed is woven fabric, and the basis weight of the woven fabric is between 40g/ ^m2 and 180g/ ^m2 . The double-sided level dyeing method of textiles as claimed in claim 1, wherein the base material to be dyed is leather, and the basis weight of the leather is between 250g/ ^m2 and 290g/ ^m2 . The double-sided leveling dyeing method of textiles as described in claim 1, wherein the dye fixing step is performed under a pressure of 185kg/ ^cm2 to 320kg/ ^cm2 . The double-sided leveling dyeing method of textiles according to claim 1, wherein the supercritical fluid includes supercritical carbon dioxide, and the density of the supercritical fluid is between 0.505g/ ^cm3 and 0.686g/ ^cm3 . The method for double-sided leveling of textiles as claimed in claim 1, wherein when a spectrometer is used to measure the CMC color difference value ΔE of the textile, the difference between the first surface and the second surface of the textile is CMC color difference value △E is less than 0.8. A kind of colorful yarn is manufactured by a manufacturing method including the following steps: a double-sided leveling step, which includes using the double-sided leveling method of textiles as described in claim 1 to dye the base material to be dyed. , to obtain the textile; and perform an unweaving step on the textile to obtain the colorful yarn. The colorful yarn according to claim 9, wherein the material of the colorful yarn includes polyester, hot-melt polyurethane, ethylene-vinyl alcohol copolymer or a combination thereof.

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