TW202136617A - Method for uniformly dyeing fabric - Google Patents

Abstract

A method for uniformly dyeing fabric including following steps is provided. An ink-jet printing process is performed on a fabric, such that a dye is disposed on a surface of the fabric in a dot arrangement. A mist spraying process is performed on the fabric, such that the fabric receives droplets. A steam fixing process is performed on the fabric, such that the dye is diffused on the surface of the fabric and is fixed on the surface of the fabric.

Description

Method of dyeing fabric evenly

The content of the disclosure relates to a method for uniformly dyeing fabrics, and in particular, to a method for uniformly dyeing fabrics processed by an inkjet printing process.

Under the trend of globalization, the textile industry is facing strong competitive pressure. The textile industry must continue to develop new technologies and diversified products in order to face global competition. In the fabric manufacturing process, it is often necessary to dye the fabric. The existing dyeing method usually puts the fabric in a dyeing machine and soaks it in a dye liquor so that the fabric can be dyed in the dyeing machine. However, this dyeing method is prone to waste of dye liquor and excessive consumption of energy. However, if the fabric is dyed by inkjet, it is easy to cause uneven dyeing of the fabric. Therefore, how to reduce the waste of dye liquor during the dyeing process and improve the dyeing uniformity of the fabric has become the focus of attention in related fields.

According to an embodiment of the present disclosure, the method for uniformly dyeing fabric includes the following steps. The inkjet printing process is performed on the fabric, so that the dye is arranged on the surface of the fabric in the form of dot arrangement. The fabric is sprayed to the wet process, so that the fabric receives the droplets. The fabric is steamed and fixed to make the dye spread on the surface of the fabric and fixed on the surface of the fabric.

In some embodiments of the present disclosure, the relative humidity of the steam fixation process is between 15% and 100%.

In some embodiments of the present disclosure, the dye is a sublimation type disperse dye, and the relative humidity of the steam fixation process is between 15% and 30%.

In some embodiments of the present disclosure, the dye is a high-fastness disperse dye, and the relative humidity of the steam fixation process is between 80% and 100%.

In some embodiments of the present disclosure, the temperature of the steam fixation process is between 170°C and 190°C.

In some embodiments of the present disclosure, the total time of the spray wet process and the steam fixation process is between 10 minutes and 20 minutes.

In some embodiments of the present disclosure, the diameter of the droplets is between 5 microns and 200 microns.

In some embodiments of the present disclosure, the method for uniformly dyeing the fabric further includes: analyzing the color strength value (K/S) and color difference value (CMCΔE) of the fabric.

In some embodiments of the present disclosure, performing color strength value analysis and color difference value analysis on the fabric includes: using a spectrophotometer (Datacolor) to perform Lab value analysis on the fabric, where the Lab value analysis is performed at 4 sampling points of the fabric. The Lab value is measured and the average value is calculated, and the circumference of each sampling point is between 9mm and 30mm.

In some embodiments of the present disclosure, when the color strength value of the fabric is less than 20, the color difference value is less than or equal to 0.84.

According to the above-mentioned embodiments of the present disclosure, the method for uniformly dyeing fabrics dyes the fabrics through the inkjet printing process, the spray wet process, and the steam fixation process. Through the inkjet printing process on the fabric, the dye can be sprayed on the surface of the fabric accurately, thereby reducing the waste of dye. In addition, by spraying the fabric into the wet process, the dye can be promoted to diffuse on the surface of the fabric during the steam fixation process, thereby improving the dyeing uniformity of the fabric.

Hereinafter, a plurality of implementation manners of the present disclosure will be disclosed in diagrams. For the sake of clarity, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit this disclosure. That is to say, in some implementations of this disclosure, these practical details are unnecessary, and therefore should not be used to limit this disclosure. In addition, in order to simplify the drawings, some conventionally used structures and elements are shown in the drawings in a simple and schematic manner. In addition, for the convenience of readers, the size of each element in the drawings is not drawn according to actual scale.

The present disclosure provides a method for uniformly dyeing fabrics, which is to dye the fabrics through an inkjet printing process, a spray to wet process, and a steam fixation process. Through the inkjet printing process on the fabric, the dye can be sprayed on the surface of the fabric accurately, thereby reducing the waste of dye. The dyeing uniformity of the fabric can be improved by spraying the fabric to the wet process and the steaming place fixing process.

FIG. 1 is a schematic diagram of the configuration of a dyeing device 100 according to an embodiment of the present disclosure. The dyeing equipment 100 includes an inkjet printing device (not shown) and a wet steaming device 110. In some embodiments, the fabric 50 sequentially passes through the inkjet printing device and the wet steaming device 110 for dyeing treatment. In some embodiments, the fabric 50 is conveyed through a conveying element 120 such as a roller. The inkjet printing device is configured to perform an inkjet printing process on the fabric 50 so as to arrange the dye on the surface of the fabric 50. The wet steaming device 110 is configured to perform a spraying to wet process and a steaming fixation process on the fabric 50 so as to spray liquid droplets on the surface of the fabric 50 and promote the diffusion and fixation of the dye.

Fig. 2 shows a flowchart of a method for uniformly dyeing fabrics using the dyeing device 100 of Fig. 1. The method for uniformly dyeing the fabric includes steps S10, S20, and S30. In step S10, an inkjet printing process is performed on the fabric. In step S20, the fabric is sprayed and wetted. In step S30, the fabric is steamed and fixed. In the following description, the above-mentioned steps will be further explained.

Please refer to FIG. 1 and FIG. 2 at the same time. In step S10, the dyeing device 100 performs an inkjet printing process on the fabric 50 through an inkjet printing device, thereby disposing the dye on the surface of the fabric 50. In detail, since the inkjet printing process can accurately spray the dye on the surface of the fabric 50 in the form of fine droplets, the arrangement of the dye on the surface of the fabric 50 does not overlap, so that the dye can be arranged in a dot arrangement pattern. On the surface of the fabric 50, so as to avoid uneven dye spraying and reduce the waste of dye. In some embodiments, the volume of each drop of dye is between 3 picoliter and 48 picoliter.

In some embodiments, the surface of the fabric 50 may be sprayed with dyes of multiple colors, and the dye of one color may form a dot on the surface of the fabric 50. In this way, the dyes of different colors can be mixed into the desired color after being diffused in the subsequent steam fixation process. Since the method for uniformly dyeing the fabric in the present disclosure is to produce the desired color through the diffusion and mixing of the dye, the pipeline corresponding to each nozzle in the inkjet printing device can be fixedly filled with the dye of the same color, thereby reducing the amount of dye. Waste and water used to clean the pipeline.

In some embodiments, the color of the dye includes cyan, magenta, yellow, black, light cyan, light magenta, and light black. black), but not limited to this. In some embodiments, dyes of different colors may be sprayed on the surface of the fabric 50 at a fixed concentration, and the concentration of light-colored dyes is, for example, a quarter of that of dark-colored dyes. In some embodiments, the type of the dye may be, for example, a disperse dye (such as a sublimation type disperse dye and a high fastness type disperse dye), a reactive dye, or an acid dye. Different types of dyes are suitable for spraying on the fabric 50 of different base materials. For example, the disperse dye is suitable for spraying on the fabric 50 whose base material is polyester, and the acid dye is suitable for spraying on the fabric 50 whose base material is nylon.

In step S20, the dyeing equipment 100 sprays and wets the fabric 50 through the steaming device 110, so that the fabric 50 can receive the droplets sprayed by the steaming device 110, so as to facilitate the dye fixation at the steaming place. Diffusion in the process. At the same time, in step S30, the dyeing equipment 100 performs a steam fixation process on the fabric 50 through the wet steaming device 110, so that the dye disposed on the fabric 50 can be diffused and fixed on the surface of the fabric 50. In other words, the wet steaming device 110 can perform the spraying wet process and the steaming fixing process on the fabric 50 at the same time.

In some embodiments, when the fabric 50 enters the wet steaming device 110 and receives the droplets, the dye disposed in the fabric 50 can be dissolved in the droplets, so that the dye can be used as a liquid during the steam fixation process. The pattern and the pattern of the gas are diffused, thereby improving the dyeing uniformity of the fabric 50. In detail, the dye on the fabric that has not been sprayed to the wet process can only be diffused in the form of gas during the steam fixation process, while the dye on the fabric 50 that has been sprayed to the wet process can be used in the steam fixation process Diffusion can be carried out in liquid form and gas form at the same time. In some embodiments, the diameter of the droplets is between 5 microns and 200 microns. In other words, the droplets are sprayed on the surface of the fabric 50 in a mist-like form to prevent the dye disposed on the surface of the fabric 50 from being exposed to too large droplets in an instant, resulting in poor diffusion, thereby affecting the dyeing of the fabric 50 Uniformity.

In some embodiments, the relative humidity of the spray wet process is between 15% and 100%. Since the spray wet process and the steam fixation process are simultaneously performed in the wet steam fixation device 110, the relative humidity of the steam fixation process is also between 15% and 100%. By adjusting the relative humidity in an appropriate range, the dye disposed on the surface of the fabric 50 can achieve a better diffusion effect, thereby improving the dyeing uniformity of the fabric 50. In detail, if the relative humidity is too low, the dye arranged on the surface of the fabric 50 will not easily diffuse in a liquid form.

In some embodiments, the total time of the spray wet process and the steam fixation process is between 10 minutes and 20 minutes. For example, the spray wet process and the steam fixation process are performed in the wet steam fixation device 110 at the same time, and the respective times of the spray wet process and the steam fixation process are the same and equal to the above-mentioned total time. By adjusting the total time of the spray-to-wet process and the steam-fixing process in a suitable range, a more suitable relative humidity can be provided during the spray-to-wet process, and a better solidification can be achieved in the steam-fixing process. Effective and reduce energy waste. In detail, if the above total time is too short, it will result in insufficient time for the dye to diffuse; on the contrary, if the above total time is too long, it may cause the dye to diffuse excessively and cause color shift, and it will also reduce the productivity. .

In some embodiments, different types of dyes have different types of diffusion capabilities. Specifically, when high-fastness-type disperse dyes are used, because high-fastness-type disperse dyes are not easy to sublimate from a solid form to a gaseous form at a temperature of 150°C to 210°C, it is difficult to fix in the steaming process. It has better liquid diffusion ability at temperature; when sublimation disperse dyes are used, since sublimation disperse dyes can be sublimated from solid form to gas form at a temperature of 150°C to 210°C, it is fixed in the steaming process. It has better gas diffusion ability at the temperature below. Therefore, by adjusting the relative humidity of the spray wet process and the steam fixation process and the total time of the spray wet process and the steam fixation process, different types of dyes can each achieve better diffusion effects.

In detail, when the dye used is a high-fastness disperse dye, the relative humidity of the spray wet process and the steam fixation process is between 80% and 100%, and the spray fixes the wet process and the steam fixation. The total time of the process ranges from 10 minutes to 20 minutes. By setting the relative humidity and total time of the spray wet process and steam fixation process in a higher range, the high-fastness disperse dyes can be diffused mainly in liquid form, so that the fabric 50 can have a relatively high Good dye uniformity. On the other hand, when the dye used is a sublimation type disperse dye, the relative humidity of the spray wet process and the steam fixation process is between 15% and 30%, and the spray wet process and the steam fixation process The total time is between 10 minutes and 15 minutes. By setting the relative humidity and total time of the spray to wet process and the steam fixation process in a lower range, the sublimation type disperse dyes can be diffused mainly in the form of gas, so that the fabric 50 can have a better Dye uniformity. In addition, for sublimation-type disperse dyes, if the relative humidity of the spray wet process and the steam fixation process is too high, the dye disposed on the surface of the fabric 50 is likely to be excessively diffused due to too much humidity, resulting in color change. Offset.

In some embodiments, the temperature of the steam fixation process is between 170°C and 190°C. In a preferred embodiment, the temperature of the steam fixation process is between 175°C and 180°C. By adjusting the temperature of the steam fixation process in an appropriate range, the dye can achieve better diffusion and fixation effects. In detail, if the temperature of the steam fixation process is too low, the dye will not have enough energy to diffuse effectively, and it will make it difficult for the dye to be fixed on the surface of the fabric 50; if the temperature of the steam fixation process is Too high, the dye tends to be fixed on the surface of the fabric 50 before it is diffused, thereby affecting the dyeing uniformity of the fabric 50.

In the following description, the fabrics of Embodiment 1 to Embodiment 12 of the present disclosure will be further described. The fabric of each example was prepared by performing the dyeing process of steps S10 to S30. In addition, the fabric of each example is a mesh knitted fabric, and the dye used in each example is a sublimation type disperse dye. In addition, the relative humidity of the spray-wetting process and the steam-fixing process of the fabric of each embodiment was 15%, the temperature was 180° C., and the time was 11 minutes. The colors presented in each embodiment are shown in Table 1.

Table I Fabric color Example 1 Light blue Example 2 Light red Example 3 light yellow Example 4 light green Example 5 Light purple Example 6 blue Example 7 Red Example 8 yellow Example 9 green Example 10 Purple Example 11 yellow-green Example 12 Grass green

In the following, various tests and evaluations will be performed on the fabrics of each embodiment. Experimental example 1: Evaluation of fabric color strength value (K/S) and color difference value (CMCΔE)

In this experimental example, a spectrophotometer (Datacolor) was used to measure the color strength value related to the color depth of the fabric and the color difference value related to the color difference of the fabric on the fabrics of Examples 1 to 10, where The color strength value of the fabric is obtained by measuring the absorbance of the fabric under the irradiation of visible light with a wavelength of 400nm to 700nm, and the color difference value of the fabric is measured by collecting 4 sampling points on the surface of the fabric to measure the Lab value and make an average value. It is calculated and the circumference diameter of each sampling point is between 9mm and 30mm. The measurement results of the fabrics of each embodiment are shown in Table 2.

Table II Color velocity value (K/S) Color difference value (CMCΔE) Example 1 16.5 0.24 Example 2 11.6 0.84 Example 3 7.2 0.34 Example 4 35.0 0.30 Example 5 23.1 0.13 Example 6 112.0 0.65 Example 7 110.5 0.25 Example 8 71.4 0.25 Example 9 120.8 0.35 Example 10 74.4 0.31

As shown in Table 2, whether it is dark or light-colored fabrics, the color difference value is less than or equal to 0.84, which meets the standards specified by the industry. It should be understood that compared to dark fabrics, light-colored fabrics have fewer color points per unit area, so it is more difficult to achieve good dyeing uniformity. However, the method for uniformly dyeing fabrics disclosed in the present disclosure can make light-colored fabrics with a color strength value less than 20 have a color difference value of less than or equal to 0.84, which can achieve good dyeing uniformity for light-colored fabrics. Experimental example 2: Evaluation of the reproducibility of the color difference value (CMCΔE) of the fabric

In this experimental example, a spectrophotometer (Datacolor) was used to measure the color difference values of the fabrics of Examples 1 to 10 respectively to evaluate the reproducibility of the color difference values of the fabrics. The color difference of the fabrics The measurement method of the value is the same as the measurement method of the color difference value used in Experimental Example 1, and will not be repeated here. The measurement results of the fabrics of each embodiment are shown in Table 3.

Table Three Color difference value measured for the first time (CMCΔE #1) Color difference value of the second measurement (CMCΔE #2) Example 1 0.24 0.49 Example 2 0.84 0.58 Example 3 0.34 0.49 Example 4 0.30 0.40 Example 5 0.13 0.39 Example 6 0.65 0.50 Example 7 0.25 0.17 Example 8 0.25 0.22 Example 9 0.35 0.17 Example 10 0.31 0.14

As shown in Table 3, regardless of whether it is a dark or light-colored fabric, the value of the color difference measured twice is less than 0.26, which has good reproducibility. In addition, the color difference value of the fabric of each embodiment measured for the second time is less than or equal to 0.60, which conforms to the industry standard. Experimental example 3: Evaluation of color difference value (CMCΔE) of large-size fabric

In this experimental example, a spectrophotometer (Datacolor) was used to measure the color difference values of the fabrics of Example 5, Examples 7 to 9 and Examples 11 to 12 multiple times. Among them, Example 5, Example 7 to The fabric size of 9 and Example 11 is 10 yards, and the fabric size of Example 12 is 20 yards. The color difference value measurement method of the fabric is the same as that used in Experimental Example 1. Here, I won't repeat it. The measurement results of the fabrics of each embodiment are shown in Table 4.

Table Four Color difference value measured for the first time (CMCΔE #1) Color difference value of the second measurement (CMCΔE #2) Color difference value of the third measurement (CMCΔE #3) Example 5 0.26 0.27 0.50 Example 7 0.28 0.31 0.37 Example 8 0.38 0.39 0.54 Example 9 0.31 0.41 0.58 Example 11 0.18 0.27 0.42 Example 12 0.20 0.55 0.70

As shown in Table 4, the color difference values of the fabrics of Example 5, Examples 7 to 9 and Examples 11 to 12 are all less than or equal to 0.70, which conforms to the industry standard. It can be seen that the method for uniformly dyeing fabrics disclosed in the present disclosure can be used on large-size fabrics, which is beneficial to the mass production of fabrics. Experimental example 4: Evaluation of fabric fastness to washing, dry rubbing, wet rubbing and sunlight

In this experimental example, the fabrics of Example 4, Example 9 and Example 10 were measured for washing fastness, dry rubbing fastness, wet rubbing fastness and sunlight fastness, among which the washing fastness was measured The AATCC 61-2013-1A test method is used. The rubbing fastness and wet rubbing fastness are measured using the AATCC 8-2016 test method, and the light fastness is measured using the CNS3845 L3074-1988 test method. The measurement results of the fabrics of each embodiment are shown in Table 5.

Table 5 Test items Test Results Example 4 Example 9 Example 10 Washing fastness Black faded 4.5 4.5 4.5 Pollution wool 4.5 4.5 4.5 Acrylic 4.5 4.5 4.5 Tetoron 4.5 4.5 4.5 nylon 4.5 4.5 4.5 cotton 4.5 4.5 4.5 acetic acid 4.5 4.5 4.5 Fastness to dry rubbing 4.5 4.5 4.5 Fastness to wet rubbing 4.5 4.5 4.5 Light fastness 4 or more 4 or more 4 or more

As shown in Table 5, the fabrics of Example 4, Example 9 and Example 10 have almost no color transfer to wool, acrylic, Tedron, nylon, cotton and acetic acid, and their fastness to dry rubbing, After the wet rubbing fastness and sunlight fastness tests, it can almost maintain its original color. It can be seen that the fabrics of Example 4, Example 9 and Example 10 can have a considerable degree of washing fastness, dry rubbing fastness, and moisture resistance after being dyed by the method of uniformly dyeing the fabric of the present disclosure. Rubbing fastness and sunlight fastness meet the needs of users.

According to the above-mentioned embodiments of the present disclosure, the method for uniformly dyeing fabrics dyes the fabrics through the inkjet printing process, the spray wet process, and the steam fixation process. Through the inkjet printing process on the fabric, the dye can be sprayed on the surface of the fabric accurately, thereby reducing the waste of dye. In addition, by spraying the fabric into the wet process, the dye can be promoted to diffuse on the surface of the fabric during the steam fixation process, thereby improving the dyeing uniformity of the fabric.

Although this disclosure has been disclosed in the above manner, it is not intended to limit this disclosure. Anyone who is familiar with this technique can make various changes and modifications without departing from the spirit and scope of this disclosure. Therefore, this disclosure is protected The scope shall be subject to the definition of the attached patent application scope.

50: fabric 100: Dyeing equipment 110: Device for wet steaming 120: Conveying element S10~S30: steps

In order to make the above and other objectives, features, advantages and embodiments of the present disclosure more obvious and understandable, the description of the accompanying drawings is as follows: FIG. 1 is a schematic diagram of the configuration of a dyeing device according to an embodiment of the present disclosure. Figure 2 shows a flow chart of a method for uniformly dyeing fabrics using the dyeing equipment of Figure 1.

Domestic deposit information (please note in the order of deposit institution, date and number) without Foreign hosting information (please note in the order of hosting country, institution, date, and number) without

S10~S30: steps

Claims (10)

A method for evenly dyeing fabrics, including: Performing an inkjet printing process on the fabric, so that the dye is arranged on the surface of the fabric in a dot arrangement pattern; Spray and wet the fabric to make the fabric receive droplets; and The fabric is steamed and fixed to make the dye spread on the surface of the fabric and fixed on the surface of the fabric. The method for uniformly dyeing a fabric as described in claim 1, wherein the relative humidity of the steam fixation process is between 15% and 100%. The method for uniformly dyeing a fabric according to claim 1, wherein the dye is a sublimation type disperse dye, and the relative humidity of the steam fixation process is between 15% and 30%. The method for uniformly dyeing a fabric according to claim 1, wherein the dye is a high-fastness disperse dye, and the relative humidity of the steam fixation process is between 80% and 100%. The method for uniformly dyeing fabrics according to claim 1, wherein the temperature of the steam fixation process is between 170°C and 190°C. The method for uniformly dyeing a fabric as described in claim 1, wherein the total time of the spray wet process and the steam fixation process is between 10 minutes and 20 minutes. The method for uniformly dyeing a fabric according to claim 1, wherein the diameter of the droplets is between 5 microns and 200 microns. The method for evenly dyeing fabrics as described in claim 1, further including: The color strength value (K/S) analysis and the color difference value (CMCΔE) analysis were performed on the fabric. The method for uniformly dyeing a fabric according to claim 8, wherein performing the color strength value analysis and the color difference value analysis on the fabric includes: Use a spectrophotometer (Datacolor) to perform Lab value analysis on the fabric, wherein the Lab value analysis is to measure the Lab value at 4 sampling points of the fabric and calculate the average value, and each sampling point The diameter of the circumference is between 9mm and 30mm. The method for uniformly dyeing a fabric according to claim 8, wherein when the color strength value of the fabric is less than 20, the color difference value is less than or equal to 0.84.

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