Finishing method for improving color fastness of chinlon-containing fabric

Abstract

The invention relates to the technical field of finishing methods of fabrics, in particular to a finishing method for improving color fastness of a chinlon-containing fabric. The finishing method comprises a dyeing process, dyes and ethyoxyl aliphatic amine derivatives are added in the dyeing process, and the dyes comprise an acid dye and an acid reactive dye. According to the finishing method disclosed by the invention, the acid dye, the acid reactive dye and the ethyoxyl fatty amine derivative are added in the dyeing procedure to enhance the complexing strength of the dye and improve the coloring stability, so that the color fastness of the fabric is improved.

Description

Technical Field

[0001] The invention relates to the technical field of fabric finishing methods, and in particular to a finishing method for improving the color fastness of nylon-containing fabrics. Background Art

[0002] Usually, nylon / nylon-spandex fabrics are dyed with acid dyes or reactive dyes. When dyeing with acid dyes, a higher content of dye is required to achieve a dark color, which will lead to poor water fastness, color weeping, and white fastness of the fabric. When dyeing with reactive dyes, calcium chloride needs to be added as a dyeing accelerator. For example, the Chinese invention patent with application number 201810803402.3 discloses a dyeing process for nylon fabrics, in which the nylon fabric is placed in a dye solution containing the reactive dye Eriofast and calcium chloride is added for dyeing. This dyeing method has high color fastness after dyeing, but the addition of a dyeing accelerator will cause the color to develop too quickly. After the dyeing is cooled, a cross-linking agent and / or alkali needs to be added to fix the color. Therefore, there are problems such as easy color fringing and horizontal stripes on the fabric. Such color abnormalities in the finished product are difficult to strip and repair. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a finishing method for improving the color fastness of nylon-containing fabrics.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a finishing method for improving the color fastness of nylon-containing fabrics, including a dyeing process, in which a dye and an ethoxylated fatty amine derivative are added, the dye including an acid dye and an acid reactive dye, and the acid dye is a metal complex type.

[0005] The beneficial effect of the present invention is that the finishing method of the present invention enhances the complexing strength of the dye and improves the coloring stability by adding acid dyes, acid reactive dyes and ethoxylated fatty amine derivatives in the dyeing process, thereby improving the color fastness of the fabric. DETAILED DESCRIPTION

[0006] To explain the technical content, achieved objectives and effects of the present invention in detail, the following describes them in conjunction with the implementation methods.

[0007] A finishing method for improving the color fastness of nylon-containing fabrics comprises a dyeing process, wherein dyes and ethoxylated fatty amine derivatives are added in the dyeing process, the dyes comprising acid dyes and acid reactive dyes, and the acid dyes are metal complex type.

[0008] As can be seen from the above description, the beneficial effects of the present invention are as follows: the finishing method of the present invention improves the color fastness of fabrics by adding acid dyes, acid reactive dyes, and ethoxylated fatty amine derivatives during the dyeing process. Acid dyes have good dyeing stability, and acid reactive dyes have good fastness, and the combination of the two can complement each other. At the same time, the acid reactive dyes contain active groups, which work together with the metal-complexed acid dyes and ethoxylated fatty amine derivatives to enhance the dye complex strength, improve color stability, and enhance color fastness. The ethoxylated fatty amine derivatives can also play a role in leveling, promoting dyeing, and adjusting the pH value, further improving color fastness.

[0009] Furthermore, the weight of the red acid dye in the dye is less than 1.0% of the weight of the cloth.

[0010] Furthermore, the weight of the yellow acid dye in the dye is less than 0.8% of the weight of the cloth.

[0011] Furthermore, the weight of the navy blue acid dye in the dye is less than 1.0% of the weight of the cloth.

[0012] Furthermore, the weight of the black acid dye in the dye is less than 2.0% of the weight of the cloth.

[0013] As can be seen from the above description, the fastness of acid dyes of various colors varies. By limiting the acid dye content of each color, the optimal fastness effect can be achieved. Too high or too low an acid dye content of a single color will lead to reduced color fastness of the fabric.

[0014] Furthermore, a dispersant is added during the dyeing process.

[0015] As can be seen from the above description, the present invention uses a dispersant as a dyeing accelerator, the dye coloring rate is slow, the color is uniform, and the appearance problems such as horizontal stripes on the fabric caused by the addition of conventional dyeing accelerators can be improved; the dispersant can also reduce the residual liquid of the dye solution and improve the adhesion of the dye.

[0016] Furthermore, the specific steps of the dyeing process are: adding a dispersant and the acid dye and acid reactive dye after chemical processing at 30-40°C, heating the temperature to 75-85°C at a heating rate of 0.5-1°C / min, adding an ethoxylated fatty amine derivative and keeping the temperature for 25-35 minutes, and then heating the temperature to 95-105°C at a heating rate of 0.7-1.2°C / min and keeping the temperature for 30-40 minutes.

[0017] From the above description, it can be seen that the coloring rate of acid dyes is relatively high at low temperatures, and the color is easily blurred when the heating rate is fast, so the initial heating rate is set to be low; while the second stage heating rate is higher to ensure production capacity.

[0018] Furthermore, acid dyes and acid reactive dyes are chemically treated with hot water at 90-100°C.

[0019] From the above description, it can be seen that acid dyes and acid reactive dyes dissolve best in hot water at 90~100℃.

[0020] Furthermore, the dyeing process is followed by a soaping process and a color fixing process.

[0021] Furthermore, the soaping process is specifically as follows: adding soaping agent, heating to 75-85°C at a rate of 0.8-1.2°C / min, and keeping the temperature for 15-25 minutes.

[0022] Furthermore, the color fixing process is specifically as follows: adding a color fixing agent, heating to 75-85°C at a rate of 0.8-1.2°C / min, and keeping the temperature for 15-25 minutes.

[0023] Embodiment 1 of the present invention is a finishing method (dyeing black) for improving the color fastness of nylon-containing fabrics, comprising the following steps: S1. Dyeing process: carried out in an Ithaca overflow dyeing machine; acid dyes and acid reactive dyes are dissolved in 95°C hot water. 0.2g / L of dispersant (model: DNMS, manufacturer: Saite) and the dissolved acid dyes and acid reactive dyes are added to the dye vat at 35°C, with a bath ratio of 1:10. The temperature is raised to 80°C at a heating rate of 0.8°C / min, followed by the addition of 2g / L of ethoxylated fatty amine derivative (manufacturer: Vigor, model: BEL-S) and the mixture is kept warm for 30 minutes. The mixture is then heated to 100°C at a heating rate of 1°C / min and kept warm for 35 minutes. Calculated as a percentage of the cloth weight, 0.8wt% acid yellow (manufacturer: Chlorospin, model: MR yellow), 0.3wt% acid red (manufacturer: Chlorospin, model: M-3G red), 2wt% acid black (manufacturer: Chlorospin, model: HM black) and 1.5wt% acid reactive black (manufacturer: Dewang, model: BH black) are added to the dye.

[0024] S2. Soaping process: It is carried out in an Ithaca overflow dyeing machine, adding soaping agent (manufacturer: Mingjia, model: MC280), heating to 80℃ at 1℃ / min and keeping warm for 20 minutes.

[0025] S3. Fixation process: It is carried out in an Ithaca overflow dyeing machine, adding a fixing agent (manufacturer: Vigors, model: PA-11), heating to 80℃ at 1℃ / min and keeping warm for 20 minutes.

[0026] The second embodiment of the present invention is a finishing method for improving the color fastness of nylon-containing fabrics (dyeing bright red), comprising the following steps: S1. Dyeing process: In an Ithaca overflow dyeing machine, acid dyes and acid reactive dyes are dissolved in 90°C hot water. 0.2 g / L of dispersant and the dissolved acid dyes and acid reactive dyes are added to a dye vat at 30°C. The bath ratio is 1:10. The temperature is raised to 75°C at a heating rate of 0.5°C / min. 2 g / L of ethoxylated fatty amine derivative is added and the temperature is kept at this temperature for 35 minutes. The temperature is then raised to 95°C at a heating rate of 0.7°C / min and the temperature is kept at this temperature for 40 minutes. Calculated as a percentage of the cloth weight, 0.3wt% acid yellow (manufacturer: Chlorospin, model: MR yellow), 1wt% acid red (manufacturer: Chlorospin, model: M-3G red) and 1.5wt% acid reactive red (manufacturer: Dewang, model: NHF red) were added to the dye.

[0027] S2. Soaping process: It is carried out in an Ithaca overflow dyeing machine, adding soaping agent (manufacturer: Mingjia, model: MC280), heating to 75℃ at 0.8℃ / min and keeping warm for 25 minutes.

[0028] S3. Fixation process: It is carried out in an Ithaca overflow dyeing machine, adding a fixing agent (manufacturer: Vigor, model: PA-11), heating to 75℃ at 0.8℃ / min and keeping warm for 25 minutes.

[0029] The third embodiment of the present invention is a finishing method for improving the color fastness of nylon-containing fabrics (dyeing black), comprising the following steps: S1. Dyeing process: In an Ithaca overflow dyeing machine, acid dyes and acid reactive dyes are dissolved in 100°C hot water. 0.2g / L of dispersant and the dissolved acid dyes and acid reactive dyes are added to the dye vat at 40°C. The bath ratio is 1:10. The temperature is raised to 85°C at a heating rate of 1°C / min. 2g / L of ethoxylated fatty amine derivative is added and the temperature is kept at this temperature for 25 minutes. The temperature is then raised to 105°C at a heating rate of 1.2°C / min and the temperature is kept at this temperature for 30 minutes. Calculated as a percentage of the cloth weight, 0.8wt% acid yellow (manufacturer: Chlorospin, model: MR yellow), 0.3wt% acid red (manufacturer: Chlorospin, model: M-3G red), 2wt% acid black (manufacturer: Chlorospin, model: HM black) and 1.5wt% acid reactive black (manufacturer: Dewang, model: BH black) are added to the dye.

[0030] S2. Soaping process: It is carried out in an Ithaca overflow dyeing machine. Soaping agent (manufacturer: Mingjia, model: MC280) is added, and the temperature is raised to 85°C at a rate of 1.2°C / min and kept at this temperature for 15 minutes.

[0031] S3. Fixation process: It is carried out in an Ithaca overflow dyeing machine, adding a fixing agent (manufacturer: Vigors, model: PA-11), heating to 85℃ at 1.2℃ / min and keeping warm for 15 minutes.

[0032] Comparative Example 1 of the present invention is: The only difference between Comparative Example 1 and Example 1 is that only acid dye is added.

[0033] Comparative Example 2 of the present invention is: The only difference between Comparative Example 2 and Example 1 is that only acid reactive dye is added.

[0034] Comparative Example 3 of the present invention is: The only difference between Comparative Example 3 and Example 1 is that, in terms of weight percentage, 0.8 wt% of acid yellow (manufacturer: Chlorospin, model: MR yellow), 2.0 wt% of acid red (manufacturer: Chlorospin, model: M-3G red), 2 wt% of acid black (manufacturer: Chlorospin, model: HM black) and 1.5 wt% of acid reactive black (manufacturer: Dewang, model: BH black) were added to the dye.

[0035] Comparative Example 4 of the present invention is: The only difference between Comparative Example 4 and Example 1 is that, in terms of weight percentage, 0.8 wt% of acid yellow (manufacturer: Chlorospin, model: MR yellow), 0.3 wt% of acid red (manufacturer: Chlorospin, model: M-3G red), 2.5 wt% of acid black (manufacturer: Chlorospin, model: HM black) and 1.5 wt% of acid reactive black (manufacturer: Dewang, model: BH black) were added to the dye.

[0036] The fastness of the finished fabrics after finishing in Example 1 and Comparative Examples 1 to 4 was tested, and the test results are shown in Table 1. The test standards for color fastness to rubbing, color fastness to soaping, and color fastness to perspiration are GBT 3920-2008, GBT 3921-2008, and GB / T 3922-2013, respectively; The test method for color fastness of textiles to water immersion is: Step 1: Cut the fabric samples to be tested with the same specifications. The fabric to be tested is a standard adjacent fabric that has been bleached, dyed and splashed. Prepare a soap solution with a concentration of 10g / L. Step 2: Fix and overlap the standard adjacent fabric on the fabric sample to be tested to make a combined sample; Step 3: Immerse the combined sample in the soap solution reagent and let it stand for testing; Step 4: Take out the combined sample, clean it, and disassemble it; Step 5: Dry the standard adjacent fabric and the fabric sample to be tested separately; use the gray standard sample card to rate and compare the standard adjacent fabric and the fabric sample to be tested to measure the color fastness to water immersion.

[0037] Table 1

[0038] In summary, the finishing method for improving the color fastness of nylon-containing fabrics provided by the present invention has the following advantages: 1. Through the combined action of acid dyes, acid reactive dyes and ethoxylated fatty amine derivatives, the complexing strength of dyes is enhanced, the coloring stability is improved, the horizontal stripe phenomenon is improved and the color fastness of fabrics is improved.

[0039] 2. Acid dyes have good dyeing stability, and acid reactive dyes have good fastness. The present invention combines the two to take advantage of their strengths and offset their weaknesses.

[0040] 3. By limiting the acid dye content of each color, the best fastness effect can be achieved.

[0041] 4. Using dispersant as dyeing accelerator can improve the appearance problems such as horizontal stripes on fabrics caused by adding conventional dyeing accelerators.

[0042] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the description of the present invention, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A finishing method for improving the color fastness of nylon-containing fabrics, characterized in that: The method comprises a dyeing process, in which dyes and ethoxylated fatty amine derivatives are added, wherein the dyes comprise acid dyes and acid reactive dyes, and the acid dyes are metal complex type.

2. The finishing method for improving the color fastness of nylon-containing fabrics according to claim 1, characterized in that: The weight of the red acid dye in the dye is less than 1.0% of the weight of the cloth.

3. The finishing method for improving the color fastness of nylon-containing fabrics according to claim 1, characterized in that: The weight of the yellow acid dye in the dye is less than 0.8% of the weight of the cloth.

4. The finishing method for improving the color fastness of nylon-containing fabrics according to claim 1, characterized in that: The weight of the navy blue acid dye in the dye is less than 1.0% of the weight of the cloth.

5. The finishing method for improving the color fastness of nylon-containing fabrics according to claim 1, characterized in that: The weight of the black acid dye in the dye is less than 2.0% of the weight of the cloth.

6. The finishing method for improving the color fastness of nylon-containing fabrics according to claim 1, characterized in that: A dispersant is added in the dyeing process.

7. The finishing method for improving the color fastness of nylon-containing fabrics according to claim 6, characterized in that: The specific steps of the dyeing process are: adding a dispersant and acid dyes and acid reactive dyes after chemical processing at 30-40°C, heating the temperature to 75-85°C at a heating rate of 0.5-1°C / min, adding an ethoxylated fatty amine derivative and keeping the temperature for 25-35 minutes, and then heating the temperature to 95-105°C at a heating rate of 0.7-1.2°C / min and keeping the temperature for 30-40 minutes.

8. The finishing method for improving the color fastness of nylon-containing fabrics according to claim 1, characterized in that: The dyeing process is followed by a soaping process and a color fixing process.

9. The finishing method for improving the color fastness of nylon-containing fabrics according to claim 8, characterized in that: The soaping process is specifically as follows: adding soaping agent, heating to 75-85° C. at a rate of 0.8-1.2° C. / min and keeping the temperature for 15-25 min.

10. The finishing method for improving the color fastness of nylon-containing fabrics according to claim 8, characterized in that: The color fixing process is specifically as follows: adding a color fixing agent, heating to 75-85°C at a rate of 0.8-1.2°C / min and keeping the temperature for 15-25min.

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