A setting finishing method for improving the oxidation resistance of dyed fabric

Abstract

This invention discloses a finishing method for improving the antioxidant capacity of dyed fabrics, comprising the following steps: 1) Pretreatment: After dyeing, the dyed fabric is soaped and then washed with water; 2) Formaldehyde-free color fixing: A formaldehyde-free color fixing agent working solution is added to the dyeing vat, and the dyed fabric treated in step 1) is placed in the color fixing agent working solution, heated and kept at that temperature to complete the color fixing; 3) Antioxidant finishing: The color-fixed dyed fabric is immersed in the antioxidant working solution, and then subjected to high-temperature finishing treatment to obtain a dyed fabric with improved antioxidant capacity. After antioxidant finishing using the method of this invention to improve the antioxidant capacity of dyed fabrics, the total color difference and color depth of the fabric are significantly better than those of the sample without antioxidant finishing, and the difference from the standard sample is very small, indicating that this method can effectively maintain color stability and dyeing uniformity while improving the antioxidant performance of the fabric.

Description

Technical Field

[0001] This invention relates to a finishing method for improving the antioxidant capacity of dyed fabrics, belonging to the field of textile fabric processing technology. Background Technology

[0002] During daily storage, display, and use, textile fabrics are susceptible to changes in color due to external environmental factors such as light, high temperatures, and oxidizing gases. These changes can manifest as yellowing, darkening, or fading, and may also be accompanied by performance degradation such as decreased fabric strength and brittleness. For example, prolonged exposure to artificial lighting in clothing stores to enhance display can accelerate the color change process of fabrics, affecting the product's aesthetics. Conversely, fabrics stored in sealed packaging in warehouses, with reduced contact with air and light, exhibit significantly less color change and performance degradation compared to fabrics stored in the open. This further confirms the impact of environmental factors on fabric stability.

[0003] As consumers' living standards improve, the market's demands for clothing fabrics are no longer limited to basic functions such as moisture wicking and antibacterial properties. The need for color stability and lifespan is increasingly prominent. Maintaining the initial color of fabrics, mitigating color changes and performance degradation caused by environmental factors, and extending the service life of textile fabrics have become pressing technical challenges for the industry. Therefore, developing targeted finishing processes to improve the antioxidant capacity of dyed fabrics, thereby optimizing their performance, has significant practical application value. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention provides a finishing method for improving the antioxidant capacity of dyed fabrics.

[0005] To achieve the above objectives, the present invention employs a finishing method for improving the antioxidant capacity of dyed fabrics, comprising the following steps:

[0006] 1) Pretreatment: After the dyed fabric has been soaped, it is washed with water;

[0007] 2) Formaldehyde-free color fixing: Add formaldehyde-free color fixing agent working solution to the dyeing vat, place the dyed fabric treated in step 1) into the color fixing agent working solution, heat up and keep warm to complete the color fixing.

[0008] 3) Antioxidant finishing: The dyed fabric after color fixation is immersed in an antioxidant working solution and then subjected to high-temperature finishing treatment to obtain a dyed fabric with improved antioxidant capacity.

[0009] Preferably, in step 1), the process parameters for the soaping treatment are: soaping agent dosage 1g / L-2g / L, soaping temperature 90-95℃, and soaping time 20-30 minutes.

[0010] Preferably, in step 2), the preparation steps of the formaldehyde-free fixing agent working solution are as follows: add room temperature water to the auxiliary tank of the dyeing vat, turn on the stirrer and add the formaldehyde-free fixing agent, and stir for 10-20 minutes until uniform; the amount of the formaldehyde-free fixing agent is 1-2% owf.

[0011] Preferably, the formaldehyde-free fixing agent is BCPH (produced by Guangdong Zhanfeng Company), which does not affect the color of the dyed fabric. BCPH is a cationic polymer, mainly made of dimethyl diallyl ammonium chloride polymer obtained by dimethylamine and propylene chloride. It is the main product of Guangdong Zhanfeng Company's active formaldehyde-free fixing agents and generally does not cause color change or reduce the color fastness to sunlight.

[0012] Preferably, in step 2), the process parameters for color fixing are: heating to 50°C, holding for 20 minutes, and draining the water from the tank after color fixing is completed.

[0013] Preferably, in step 3), the preparation step of the antioxidant working solution is as follows: take an antioxidant that does not contain ADH, add an appropriate amount of water and stir evenly; the amount of the antioxidant is 20-60 g / L.

[0014] Preferably, the antioxidant is QH-3418 (produced by Guangdong Zhanfeng Company). The main component of Zhanfeng antioxidant QH-3418 is 1,6-hexamethylene-bis(N,N-dimethylaminourea). Zhanfeng antioxidant QH-3418 can inhibit yellowing during the high-temperature setting process and color changes caused by oxidation after long-term storage. It is suitable for the setting process of light-colored cotton fabrics and is one of the main antioxidant products of Zhanfeng Company.

[0015] Preferably, in step 3), the process parameters for high-temperature setting are: roll pressure 2.5-3 kg, setting temperature 150-180℃, and setting speed 20-30 m / min.

[0016] Preferably, the fabric is a cotton knitted plain weave fabric, cotton knitted rib fabric, or cotton blended knitted fabric woven from 20-40 count yarns.

[0017] Preferably, after the high-temperature setting treatment in step 3), the dyed fabric is left to stand for one month to observe the color change and to verify the color by computer measurement.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. After dyeing, the fabric is pretreated with soap to effectively remove floating dyes that are not covalently bound to the fibers and free dyes dispersed in the dye bath. Then, a formaldehyde-free fixing agent that does not change the original color of the fabric is used for color fixation treatment. This can significantly improve the color fastness of the fabric (including washing fastness, rubbing fastness, etc.), effectively reduce the risk of color fading and staining during subsequent use or washing, and avoid color shift of the fabric caused by the color fixation process, thus ensuring the consistency of the appearance of the dyed fabric.

[0020] 2. This invention uses QH-3418, an antioxidant that does not contain ADH components harmful to the human body. Through padding and high-temperature setting processes, the antioxidant is fully combined with the fabric fibers. The fabric treated by this process not only retains its original soft feel, but the antioxidant can also form a stable protective layer on the fabric surface, which can resist the fabric discoloration (yellowing, darkening, lightening) and strength reduction caused by environmental factors such as light, oxidizing gases, and temperature for a long time, significantly extending the service life and storage stability of dyed fabrics. Detailed Implementation

[0021] To verify the technical effect of the process of the present invention in improving the antioxidant capacity of cotton knitted fabrics without affecting the color and hand feel of the fabric, the present invention selects a formaldehyde-free fixing agent that does not affect the color change to complete the fixing treatment, and then impregnates the antioxidant with a setting machine and sets it at high temperature.

[0022] To make the technical effects, features, and process advantages of the present invention easier to understand, the present invention will be further described in detail below with reference to specific embodiments of large-scale factory production.

[0023] Example 1

[0024] A finishing method for improving the antioxidant capacity of dyed fabrics includes the following steps:

[0025] 1) Select 40-count pure cotton plain weave fabric as the fabric for large-scale production;

[0026] 2) Soap washing: The dosage of soap washing agent is 2g / L, and the soap washing process conditions are 95℃×20 minutes;

[0027] 3) Preparation of fixing agent (preparation of formaldehyde-free fixing agent working solution): The amount of fixing agent BCPH is 1% (owf), the starting temperature of the auxiliary tank is room temperature, and the stirring time is 10 minutes;

[0028] 4) Color fixing: The color fixing process is 50℃ for 20 minutes;

[0029] 5) After color fixing, remove from the vat and await shaping and finishing.

[0030] 6) Shaping and finishing: After soaking and rolling in clean water, dry;

[0031] 7) Set the setting machine roller pressure to 3 kg, setting temperature to 170℃, and setting machine speed to 20 m / min;

[0032] 8) After the fabric is cleaned and set, the sample fabric is left to stand for 1 month to observe the color change and measure the color.

[0033] Example 2

[0034] A finishing method for improving the antioxidant capacity of dyed fabrics includes the following steps:

[0035] 1) Select 40-count pure cotton plain weave fabric as the fabric for large-scale production;

[0036] 2) Soap washing: The dosage of soap washing agent is 2g / L, and the soap washing process conditions are 95℃×20 minutes;

[0037] 3) Applying the color-fixing agent: The amount of color-fixing agent BCPH is 1% (owf), the starting temperature of the auxiliary tank is room temperature, and the stirring time is 10 minutes;

[0038] 4) Color fixing: The color fixing process is 50℃ for 20 minutes;

[0039] 5) After color fixing, remove from the vat and await antioxidant finishing;

[0040] 6) Finishing: The dosage of antioxidant QH-3418 is 20g / L;

[0041] 7) Set the setting machine roller pressure to 3 kg, setting temperature to 170℃, and setting machine speed to 20 m / min;

[0042] 8) After the fabric undergoes antioxidant finishing, the sample fabric is left to stand for 1 month to observe color changes and measure color.

[0043] Example 3

[0044] A finishing method for improving the antioxidant capacity of dyed fabrics includes the following steps:

[0045] 1) Select 40-count pure cotton plain weave fabric as the fabric for large-scale production;

[0046] 2) Soap washing: The dosage of soap washing agent is 2g / L, and the soap washing process conditions are 95℃×20 minutes;

[0047] 3) Applying the color-fixing agent: The amount of color-fixing agent BCPH is 1% (owf), the starting temperature of the auxiliary tank is room temperature, and the stirring time is 10 minutes;

[0048] 4) Color fixing: The color fixing process is 50℃ for 20 minutes;

[0049] 5) After color fixing, remove from the vat and await antioxidant finishing;

[0050] 6) Finishing: The dosage of antioxidant QH-3418 is 40g / L;

[0051] 7) Set the setting machine roller pressure to 3 kg, setting temperature to 170℃, and setting machine speed to 20 m / min;

[0052] 8) After the fabric undergoes antioxidant finishing, the sample fabric is left to stand for 1 month to observe color changes and measure color.

[0053] Example 4

[0054] A finishing method for improving the antioxidant capacity of dyed fabrics includes the following steps:

[0055] 1) Select 32S / 2*2 all-cotton rib fabric as the fabric for mass production;

[0056] 2) Soap washing: The dosage of soap washing agent is 2g / L, and the soap washing process conditions are 95℃×20 minutes;

[0057] 3) Applying the color-fixing agent: The amount of color-fixing agent BCPH is 1% (owf), the starting temperature of the auxiliary tank is room temperature, and the stirring time is 10 minutes;

[0058] 4) Color fixing: The color fixing process is 50℃ for 20 minutes;

[0059] 5) After color fixing, remove from the vat and await antioxidant finishing;

[0060] 6) Shaping and finishing: After soaking and rolling in clean water, dry;

[0061] 7) Set the setting machine roller pressure to 3 kg, setting temperature to 170℃, and setting machine speed to 20 m / min;

[0062] 8) After the fabric is cleaned and set, the sample fabric is left to stand for 1 month to observe the color change and measure the color.

[0063] Example 5

[0064] A finishing method for improving the antioxidant capacity of dyed fabrics includes the following steps:

[0065] 1) Select 32S / 2*2 all-cotton rib fabric as the fabric for mass production;

[0066] 2) Soap washing: The dosage of soap washing agent is 2g / L, and the soap washing process conditions are 95℃×20 minutes;

[0067] 3) Applying the color-fixing agent: The amount of color-fixing agent BCPH is 1% (owf), the starting temperature of the auxiliary tank is room temperature, and the stirring time is 10 minutes;

[0068] 4) Color fixing: The color fixing process is 50℃ for 20 minutes;

[0069] 5) After color fixing, remove from the vat and await antioxidant finishing;

[0070] 6) Finishing: The dosage of antioxidant QH-3418 is 20g / L;

[0071] 7) Set the setting machine roller pressure to 3 kg, setting temperature to 170℃, and setting machine speed to 20 m / min;

[0072] 8) After the fabric undergoes antioxidant finishing, the sample fabric is left to stand for 1 month to observe color changes and measure color.

[0073] Example 6

[0074] A finishing method for improving the antioxidant capacity of dyed fabrics includes the following steps:

[0075] 1) Select 32S / 2*2 all-cotton rib fabric as the fabric for mass production;

[0076] 2) Soap washing: The dosage of soap washing agent is 2g / L, and the soap washing process conditions are 95℃×20 minutes;

[0077] 3) Applying the color-fixing agent: The amount of color-fixing agent BCPH is 1% (owf), the starting temperature of the auxiliary tank is room temperature, and the stirring time is 10 minutes;

[0078] 4) Color fixing: The color fixing process is 50℃ for 20 minutes;

[0079] 5) After color fixing, remove from the vat and await antioxidant finishing;

[0080] 6) Finishing: The dosage of antioxidant QH-3418 is 40g / L;

[0081] 7) Set the setting machine roller pressure to 3 kg, setting temperature to 170℃, and setting machine speed to 20 m / min;

[0082] 8) After the fabric undergoes antioxidant finishing, the sample fabric is left to stand for 1 month to observe color changes and measure color.

[0083] Comparative Example 1

[0084] A finishing method for improving the antioxidant capacity of dyed fabrics includes the following steps:

[0085] 1) Select 40-count pure cotton plain weave fabric as the fabric for large-scale production;

[0086] 2) Soap washing: The dosage of soap washing agent is 2g / L, and the soap washing process conditions are 95℃×20 minutes;

[0087] 3) Applying the color-fixing agent: The amount of color-fixing agent BCPH is 1% (owf), the starting temperature of the auxiliary tank is room temperature, and the stirring time is 10 minutes;

[0088] 4) Color fixing: The color fixing process is 50℃ for 20 minutes;

[0089] 5) After color fixing, remove from the vat and await shaping and finishing.

[0090] 6) Shaping and finishing: After soaking and rolling in clean water, dry;

[0091] 7) Set the setting machine roller pressure to 3 kg, setting temperature to 170℃, and setting machine speed to 20 m / min;

[0092] 8) After the fabric is cleaned and set, it is rehydrated for 4 hours before color measurement.

[0093] Comparative Example 2

[0094] A finishing method for improving the antioxidant capacity of dyed fabrics includes the following steps:

[0095] 1) Select 32S / 2*2 all-cotton rib fabric as the fabric for mass production;

[0096] 2) Soap washing: The dosage of soap washing agent is 2g / L, and the soap washing process conditions are 95℃×20 minutes;

[0097] 3) Applying the color-fixing agent: The amount of color-fixing agent BCPH is 1% (owf), the starting temperature of the auxiliary tank is room temperature, and the stirring time is 10 minutes;

[0098] 4) Color fixing: The color fixing process is 50℃ for 20 minutes;

[0099] 5) After color fixing, remove from the vat and await antioxidant finishing;

[0100] 6) Shaping and finishing: After soaking and rolling in clean water, dry;

[0101] 7) Set the setting machine roller pressure to 3 kg, setting temperature to 170℃, and setting machine speed to 20 m / min;

[0102] 8) After the fabric is cleaned and set, the color is measured 4 hours after the sample fabric is re-moistened.

[0103] Computer colorimetry was performed on the fabric surfaces of Examples 1-6 and Comparative Examples 1-2. The computer colorimetry data are as follows:

[0104]

[0105] Note: In the above fabric color measurement data, the data of Examples 1-3 and Comparative Example 1 were measured by computer after finishing 40-count pure cotton plain weave fabric, with Comparative Example 1 being the standard color measurement sample; the data of Examples 4-6 and Comparative Example 2 were measured by computer after finishing 32 / 2*2 pure cotton rib weave fabric, with Comparative Example 2 being the standard color measurement sample.

[0106] As can be clearly seen from the data in Table 1, after the antioxidant finishing process using the method of the present invention to improve the antioxidant capacity of dyed fabrics, the total color difference (CMC DE) and strength difference of the fabric are significantly better than those of the sample without antioxidant finishing, and the difference from the standard sample is very small. This indicates that the method can effectively maintain color stability and dyeing uniformity while improving the antioxidant performance of the fabric.

[0107] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A finishing method for improving the antioxidant capacity of dyed fabrics, characterized in that, Includes the following steps: 1) Pretreatment: After the dyed fabric has been soaped, it is washed with water; 2) Formaldehyde-free color fixing: Add formaldehyde-free color fixing agent working solution to the dyeing vat, place the dyed fabric treated in step 1) into the color fixing agent working solution, heat up and keep warm to complete the color fixing. 3) Antioxidant finishing: The dyed fabric after color fixation is immersed in an antioxidant working solution and then subjected to high-temperature finishing treatment to obtain a dyed fabric with improved antioxidant capacity.

2. The finishing method for improving the antioxidant capacity of dyed fabrics according to claim 1, characterized in that, In step 1), the process parameters for soaping are: soaping agent dosage 1g / L-2g / L, soaping temperature 90-95℃, and soaping time 20-30 minutes.

3. The finishing method for improving the antioxidant capacity of dyed fabrics according to claim 1, characterized in that, In step 2), the preparation steps of the formaldehyde-free fixing agent working solution are as follows: add room temperature water to the auxiliary tank of the dyeing vat, turn on the stirrer and add the formaldehyde-free fixing agent, stir for 10-20 minutes until uniform; the amount of the formaldehyde-free fixing agent is 1-2% owf.

4. The finishing method for improving the antioxidant capacity of dyed fabrics according to claim 3, characterized in that, The formaldehyde-free fixing agent is BCPH, a fixing agent that does not affect the color of the dyed fabric.

5. A finishing method for improving the antioxidant capacity of dyed fabrics according to claim 1, characterized in that, In step 2), the process parameters for color fixing are: heating to 50°C, holding for 20 minutes, and draining the water from the tank after color fixing is completed.

6. The finishing method for improving the antioxidant capacity of dyed fabrics according to claim 1, characterized in that, In step 3), the preparation steps of the antioxidant working solution are as follows: take an antioxidant that does not contain ADH, add an appropriate amount of water and stir evenly; the amount of the antioxidant is 20-60g / L.

7. A finishing method for improving the antioxidant capacity of dyed fabrics according to claim 6, characterized in that, The antioxidant is QH-3418.

8. A finishing method for improving the antioxidant capacity of dyed fabrics according to claim 1, characterized in that, In step 3), the process parameters for high-temperature setting are: roll pressure 2.5-3 kg, setting temperature 150-180℃, and setting speed 20-30 m / min.

9. A finishing method for improving the antioxidant capacity of dyed fabrics according to claim 1, characterized in that, The fabric is a cotton knitted plain weave fabric, cotton knitted rib fabric, or cotton blended knitted fabric woven from 20-40 count yarns.

10. A finishing method for improving the antioxidant capacity of dyed fabrics according to claim 1, characterized in that, After the high-temperature setting treatment in step 3), the dyed fabric is left to stand for one month to observe the color change and to verify the color by computer measurement.

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