Blended fabric heterochromatic dyeing process
Through a heterochromatic dyeing process for blended textiles, including pretreatment, dyeing for different fibers and color fixing treatment, the problem of poor color dyeing effect of blended textiles in the prior art is solved, and efficient, environmentally friendly and high-quality dyeing effects are achieved.
Patent Information
- Application Number
- CN202411917683.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-03-28
AI Technical Summary
The prior art is difficult to achieve heterochromatic dyeing of blended textile fabrics, resulting in non-bright colors, uneven colors or poor color fastness, and complex operations, high costs and insufficient environmental protection.
A process is adopted, including pretreatment, dyeing for cotton and polyester fibers separately, and color fixing, using optimized process flow and parameter control, including precise adjustment of temperature, time and dye concentration.
It significantly improves dyeing efficiency, achieves a distinct and lasting color effect, improves color fastness, reduces damage to fabric performance, simplifies operation, reduces costs, and improves environmental protection.
Smart Images
Figure CN119711211A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of textile dyeing, and more specifically, particularly relates to a process for dyeing blended fabrics in different colors. Background Art
[0002] In the textile field, blended fabrics are widely used because they combine the advantages of different fibers. However, heterochromatic dyeing of blended fabrics has always been a challenging problem.
[0003] Traditional dyeing methods for blended fabrics usually have many limitations. In the single dyeing process, due to the different affinity and adsorption capacity of different fibers to dyes, it is often difficult to achieve the ideal dyeing effect of two fibers at the same time, resulting in dull, uneven colors or poor color fastness.
[0004] Moreover, the existing dyeing process may have an adverse effect on the performance of the fabric, such as reducing the strength of the fabric, making the hand feel worse, etc. This not only affects the quality and use value of the product, but also limits the application of blended fabrics in the high-end market.
[0005] In addition, some dyeing processes are complex, requiring multiple steps and strict condition control, which increases production costs and production cycles. At the same time, traditional processes are also insufficient in terms of environmental protection, and the chemical reagents used may cause significant pollution to the environment.
[0006] With the increasing demands of consumers for color diversity and quality of textiles, as well as the enhancement of environmental awareness, there is an urgent need for an innovative hybrid dyeing process for blended fabrics, which can not only achieve excellent dyeing effects, ensure color fastness and fabric performance, but also have the advantages of easy operation, reasonable cost and environmental friendliness. Summary of the invention
[0007] In order to solve the above technical problems, the present invention provides a blended fabric different color dyeing process to solve the above problems.
[0008] A blended fabric dyeing process comprises the following steps:
[0009] S1: preparing a blended fabric, wherein the blended fabric consists of cotton fiber and polyester fiber in a weight ratio of 4:1;
[0010] S2: Soak the blended fabric in a pretreatment solution at a temperature of 45°C for 30 minutes;
[0011] S3: Take out the blended fabric, wash it with water and dry it.
[0012] Preferably, in the dyeing step, the cotton fiber is dyed with a reactive red dye, the concentration of the reactive red dye is 20 g / L, the dyeing temperature is 90° C., and the dyeing time is 40 minutes.
[0013] Preferably, disperse blue dye is used to dye the polyester fiber, the concentration of disperse blue dye is 15 g / L, the dyeing temperature is 80° C., and the dyeing time is 35 minutes.
[0014] Preferably, after the cotton fiber is dyed, it is washed and dried at a temperature of 75° C. for 20 minutes.
[0015] Preferably, after the polyester fiber is dyed, it is washed and dried at a temperature of 70° C. for 18 minutes.
[0016] Preferably, the pretreatment liquid is composed of JFC penetrant, silicone softener and water in a volume ratio of 3:1:6.
[0017] Preferably, the concentration of the JFC penetrant is 10 g / L, and the concentration of the silicone softener is 6 g / L.
[0018] Preferably, during the dyeing process, the pH value of the dye solution is controlled to be 5.5-6.0, and the pH is adjusted using an acetic acid-sodium acetate buffer solution. The concentration of the buffer solution is calculated using the formula: C=0.05×(δ×V) / (Ka×V1), wherein C is the concentration of the buffer solution, δ is the pH variation range, V is the volume of the dye solution, Ka is the dissociation constant of acetic acid, and V1 is the volume of the buffer solution added.
[0019] Preferably, after dyeing, the blended fabric is subjected to a fixing treatment, and the fixing agent is an aldehyde-free fixing agent DUR, the concentration of which is 10 g / L, the fixing temperature is 65° C., and the fixing time is 20 minutes.
[0020] Preferably, after the color fixing treatment is completed, the fabric is washed and dried to obtain a blended fabric dyed with different colors, and the drying temperature is 65° C. and the drying time is 15 minutes.
[0021] Compared with the prior art, the present invention has the following beneficial effects:
[0022] 1. The blended fabric heterochromatic dyeing process provided by the present invention significantly improves the dyeing efficiency. Through optimized process flow and precise parameter control, the entire dyeing cycle is greatly shortened, and high-quality dyeing effects can be quickly achieved, meeting the needs of modern industrial rapid production, helping enterprises to improve production efficiency and increase output, thereby gaining an advantage in market competition.
[0023] 2. This process achieves excellent heterochromatic dyeing effects. The dyeing process is carried out according to the characteristics of cotton fiber and polyester fiber, so that the two fibers can present distinct and lasting different colors, which are bright and uniform, satisfying consumers' pursuit of diversified and personalized colors, and providing more possibilities for the design and innovation of textile products.
[0024] 3. Effectively improve color fastness. The use of specific dyes, color fixing agents and optimized dyeing and fixing conditions significantly enhances the color fastness of dyed fabrics to washing and rubbing, making the fabrics less likely to fade during multiple washings and uses, maintaining a good appearance, extending the service life of the fabrics, and improving the quality and value of the products.
[0025] 4. The present invention causes less damage to the fabric during the dyeing process. Through carefully selected chemical reagents and reasonable process parameters, the strong damage to the fiber is minimized to the greatest extent, and the mechanical properties of the fabric such as breaking strength and tearing strength are guaranteed, so that the dyed fabric can still maintain good strength and durability, and is suitable for various application scenarios.
[0026] 5. Improved fabric feel. In the dyeing and processing process, by using appropriate auxiliaries and mild conditions, the fabric maintains a soft, smooth and comfortable feel, which not only improves the product experience, but also increases the added value of the product, making it more attractive in the market.
[0027] 6. The dyeing process has good adaptability. It can be applied to blended fabrics of cotton fiber and polyester fiber in different proportions, which provides convenience for enterprises to flexibly adjust product structure and meet the needs of different customers, reduces production costs and inventory pressure, and enhances the ability of enterprises to cope with market changes.
[0028] 7. The present invention pays attention to environmental protection. In the dyeing process, environmentally friendly dyes, auxiliaries and fixing agents are selected to reduce the emission of harmful substances and the pollution to the environment, which meets the requirements of modern society for green production and sustainable development and helps to enhance the social image and sense of responsibility of the enterprise.
[0029] 8. Improved resource utilization. Through optimized dyeing process, the waste of dyes and auxiliaries is reduced, the utilization rate of raw materials is improved, the production cost is reduced, and the generation of waste is reduced, so that resource conservation and recycling are achieved, which is in line with the development concept of a resource-saving society.
[0030] 9. Promoted the technological progress of the textile industry. The present invention provides new ideas and methods for the dyeing process of blended fabrics, promotes the research and development and innovation of related technologies in the industry, helps to improve the technical level and competitiveness of the entire textile industry, and injects new vitality into the sustainable development of the industry. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] Figure 1 It is a schematic diagram of the overall process of the present invention. DETAILED DESCRIPTION
[0032] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0033] The present invention relates to a blended fabric heterochromatic dyeing process, aiming to provide a highly efficient, stable dyeing method for blended fabrics of cotton and polyester fibers that can achieve heterochromatic effects. The implementation process and effects of the process will be described in detail below through multiple specific embodiments, and comparative analysis will be performed through data and tables.
[0034] Experimental materials and equipment:
[0035] Experimental Materials:
[0036] Cotton and polyester blended fabrics (different ratios, such as 4:1, 3:2, 2:3, etc.);
[0037] Reactive red dye, disperse blue dye;
[0038] JFC penetrant, silicone softener;
[0039] Acetic acid, sodium acetate;
[0040] Formaldehyde-free fixing agent DUR;
[0041] Deionized water.
[0042] Experimental equipment:
[0043] High temperature dyeing machine;
[0044] Acidity meter;
[0045] Electronic balance;
[0046] Oven;
[0047] Spectrophotometer.
[0048] Embodiment 1:
[0049] Preparation of blended fabrics: Select a blended fabric consisting of cotton fiber and polyester fiber in a weight ratio of 4:1.
[0050] Pretreatment: Soak the blended fabric in a pretreatment solution (JFC penetrant concentration of 10 g / L, silicone softener concentration of 6 g / L, water volume percentage of 60%) at a temperature of 45° C. for 30 minutes.
[0051] Cotton fiber dyeing: Use reactive red dye to dye the cotton fiber, the dye concentration is 20g / L, the dyeing temperature is 90℃, and the dyeing time is 40 minutes.
[0052] Washing and drying: After dyeing, the cotton fiber is washed and then dried in an oven at 75°C for 20 minutes.
[0053] Polyester fiber dyeing: The polyester fiber was dyed with disperse blue dye at a dye concentration of 15 g / L, a dyeing temperature of 80°C, and a dyeing time of 35 minutes.
[0054] Wash and dry again: After dyeing, the polyester fiber is washed and then dried in an oven at 70°C for 18 minutes.
[0055] Fixation treatment: Use 10g / L of formaldehyde-free fixing agent DUR at 65°C for 20 minutes.
[0056] Final washing and drying: After the fixation treatment is completed, wash with water and then dry in an oven at 65°C for 15 minutes.
[0057] Embodiment 2:
[0058] Preparation of blended fabrics: Select a blended fabric consisting of cotton fiber and polyester fiber in a weight ratio of 3:2.
[0059] Pretreatment: Soak the blended fabric in a pretreatment solution (JFC penetrant concentration of 8 g / L, silicone softener concentration of 5 g / L, water volume percentage of 65%) at a temperature of 40° C. for 25 minutes.
[0060] Cotton fiber dyeing: Reactive red dye was used to dye the cotton fiber, the dye concentration was 18 g / L, the dyeing temperature was 85°C, and the dyeing time was 35 minutes.
[0061] Washing and drying: After dyeing, the cotton fiber is washed and then dried in an oven at 70°C for 18 minutes.
[0062] Polyester fiber dyeing: The polyester fiber was dyed with disperse blue dye at a dye concentration of 13 g / L, a dyeing temperature of 75°C, and a dyeing time of 30 minutes.
[0063] Wash and dry again: After dyeing, the polyester fiber is washed and then dried in an oven at 65°C for 15 minutes.
[0064] Fixation treatment: Use 8g / L of formaldehyde-free fixing agent DUR at 60°C for 18 minutes.
[0065] Final washing and drying: After the fixation treatment is completed, wash with water and then dry in an oven at 60°C for 12 minutes.
[0066] Embodiment 3:
[0067] Preparation of blended fabrics: Select a blended fabric consisting of cotton fiber and polyester fiber in a weight ratio of 2:3.
[0068] Pretreatment: Soak the blended fabric in a pretreatment solution (JFC penetrant concentration of 12 g / L, silicone softener concentration of 7 g / L, water volume percentage of 55%) at a temperature of 50° C. for 35 minutes.
[0069] Cotton fiber dyeing: Reactive red dye was used to dye the cotton fiber, the dye concentration was 22 g / L, the dyeing temperature was 95°C, and the dyeing time was 45 minutes.
[0070] Washing and drying: After dyeing, the cotton fiber is washed and then dried in an oven at 80°C for 22 minutes.
[0071] Polyester fiber dyeing: The polyester fiber was dyed with disperse blue dye at a dye concentration of 17 g / L, a dyeing temperature of 85°C, and a dyeing time of 40 minutes.
[0072] Wash and dry again: After dyeing, the polyester fiber is washed and then dried in an oven at 75°C for 20 minutes.
[0073] Fixation treatment: Use 12g / L of formaldehyde-free fixing agent DUR at 70°C for 22 minutes.
[0074] Final washing and drying: After the fixation treatment is completed, wash with water and then dry in an oven at 70°C for 18 minutes.
[0075] The dyed blended fabrics in the above three embodiments were subjected to performance tests, including color fastness (washing color fastness, rubbing color fastness), strength (breaking strength, tearing strength), hand feel and other indicators, and the test results were organized into the following table:
[0076]
[0077]
[0078] By analyzing the table data, the following conclusions can be drawn:
[0079] In terms of color fastness, Examples 1 and 3 performed relatively well, especially the color fastness to washing reached level 4-5, and the color fastness to rubbing was also relatively good.
[0080] In terms of strength, the breaking strength and tearing strength values of the three embodiments are relatively close, indicating that the dyeing process has little effect on the strength of the fabric.
[0081] In terms of hand feel, the fabrics of the three embodiments all have good hand feel, among which Embodiment 1 has the best hand feel.
[0082] First, from the specific process of the embodiment, each step of this dyeing process has a clear purpose and function. The pretreatment step improves the surface properties of the fiber through the pretreatment liquid of specific temperature and composition, lays a good foundation for the subsequent dyeing process, and helps to improve the permeability and uniformity of the dye. In the dyeing process of cotton fiber and polyester fiber respectively, suitable dyes and optimized dyeing conditions are selected for the characteristics of the two fibers to ensure that each can achieve a desired dyeing effect. The color fixation treatment link further enhances the binding fastness of the dye on the fiber, improves the color fastness of the dyed fabric, and enables it to maintain stable color during use and washing.
[0083] In terms of performance testing, color fastness, strength and feel are important indicators for evaluating dyeing effects and fabric quality. From the test results, this process can achieve good color fastness at different blending ratios. The performance of washing color fastness and rubbing color fastness shows that the fabric after dyeing has a strong ability to retain color in daily use and is not easy to fade or fade due to friction. In terms of strength, although the values in different embodiments are different, they are generally kept within a reasonable range, indicating that the dyeing process has little effect on the basic mechanical properties of the fabric and can meet the requirements of actual use. The good performance in feel reflects the focus of this process on the softness and comfort of the fabric during the processing, which is of great significance for improving the quality and user experience of the fabric.
[0084] Further analysis of the influencing factors shows that the ratio of blended fabrics is a key factor. Different ratios of cotton fiber and polyester fiber not only affect the difficulty and effect of dyeing, but are also directly related to the final performance of the fabric. For example, blended fabrics with a higher cotton fiber ratio have advantages in water absorption and breathability, but may be relatively weak in strength and wear resistance; while fabrics with a higher polyester fiber ratio perform better in strength and wear resistance, but may be slightly inferior in moisture absorption. Therefore, in practical applications, it is necessary to select the appropriate blending ratio based on the specific use and performance requirements of the product.
[0085] Optimization of pretreatment conditions is crucial to improving dyeing results. Reasonable selection of pretreatment liquid temperature, component concentration and immersion time can significantly improve fiber wettability and dyeability, allowing dyes to penetrate more evenly and deeply into the fiber, improving dyeing uniformity and depth.
[0086] Precise control of dyeing conditions is the key to achieving ideal dyeing results. The proper combination of dye concentration, dyeing temperature and time needs to be determined based on the characteristics of the fiber, the performance of the dye and the desired dyeing effect. Too high or too low parameter settings may result in uneven dyeing, insufficient color fastness or adverse effects on fabric performance.
[0087] The proper selection of fixing conditions is the key to ensuring color fastness. The reasonable combination of fixing agent concentration, temperature and time can effectively enhance the binding force between dye and fiber and improve color fastness, while paying attention to avoid negative impact on other properties of fabric.
[0088] In summary, the "a blended fabric heterochromatic dyeing process" of the present invention has strong practicality and operability. Through the verification of multiple embodiments, its adaptability and stability under different blending ratios are demonstrated. In actual production, this process can provide an efficient and reliable solution for the heterochromatic dyeing of blended fabrics, meeting the market demand for diversified and high-quality dyed fabrics. However, it should be pointed out that although this process has achieved good results under experimental conditions, in large-scale industrial production, it is necessary to further consider factors such as production efficiency, cost control, and environmental protection. In the future, on the basis of existing processes, in-depth research and optimization can be continued, such as exploring more environmentally friendly pretreatment agents and color fixing agents, optimizing process flow to improve production efficiency, reduce energy consumption, etc. At the same time, combined with advanced detection technology and equipment, the dyeing process and product quality are more accurately monitored and evaluated, so as to continuously improve the process level and product quality, and promote the development and innovation of blended fabric dyeing technology.
[0089] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.
Claims
1. A process for dyeing blended fabrics in different colors, characterized in that: The following steps are involved: S1: preparing a blended fabric, wherein the blended fabric consists of cotton fiber and polyester fiber in a weight ratio of 4:1; S2: Soak the blended fabric in a pretreatment solution at a temperature of 45°C for 30 minutes; S3: Take out the blended fabric, wash it with water and dry it.
2. A blended fabric dyeing process according to claim 1, characterized in that: In the dyeing step, the cotton fiber is dyed with reactive red dye, the concentration of the reactive red dye is 20 g / L, the dyeing temperature is 90° C., and the dyeing time is 40 minutes.
3. A blended fabric dyeing process according to claim 1, characterized in that: The polyester fiber was dyed with disperse blue dye, the concentration of disperse blue dye was 15 g / L, the dyeing temperature was 80° C., and the dyeing time was 35 minutes.
4. A blended fabric dyeing process according to claim 1, characterized in that: After the cotton fiber is dyed, it is washed and dried at a temperature of 75°C for 20 minutes.
5. A blended fabric dyeing process according to claim 1, characterized in that: After the polyester fiber is dyed, it is washed and dried at a temperature of 70°C for 18 minutes.
6. A blended fabric dyeing process according to claim 1, characterized in that: The pretreatment liquid is composed of JFC penetrant, silicone softener and water in a volume ratio of 3:1:
6.
7. A blended fabric dyeing process according to claim 1, characterized in that: The concentration of the JFC penetrant is 10 g / L, and the concentration of the silicone softener is 6 g / L.
8. A blended fabric dyeing process according to claim 1, characterized in that: During the dyeing process, the pH value of the dye solution is controlled at 5.5-6.0, and the pH is adjusted using an acetic acid-sodium acetate buffer solution. The concentration calculation formula of the buffer solution is: C=0.05×(δ×V) / (Ka×V1), where C is the concentration of the buffer solution, δ is the pH variation range, V is the volume of the dye solution, Ka is the dissociation constant of acetic acid, and V1 is the volume of the added buffer solution.
9. A blended fabric dyeing process according to claim 1, characterized in that: After dyeing, the blended fabric is subjected to a fixing treatment, and the fixing agent is formaldehyde-free fixing agent DUR, the concentration of which is 10 g / L, the fixing temperature is 65°C, and the fixing time is 20 minutes.
10. A blended fabric dyeing process according to claim 1, characterized in that: After the color fixing treatment is completed, the fabric is washed and dried to obtain a blended fabric dyed in different colors. The drying temperature is 65° C. and the drying time is 15 minutes.