Production process of high-whiteness refined cotton

Abstract

The invention discloses a production process of high-whiteness refined cotton. The production process comprises the steps of material selection, cooking, bleaching, dyeing, drying and the like. By optimizing the bleaching process and the dyeing uniformity, a high-whiteness product is obtained, and the requirement of modern consumers for color purity is met; the integrity and uniform heating of the cotton fibers are ensured by a microwave baking technology and a disperse dyeing technology, and the wrinkle resistance, tear resistance and other properties of the product are enhanced; by controlling the dyeing temperature and time, the frizz phenomenon is avoided, and the visual effect and comfort of the product are improved; the high-pressure steam sterilization technology and the disperse dyeing technology effectively prevent fiber damage, and the service life of the product is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of textiles, and specifically relates to a production process of high-whiteness refined cotton. Background Art

[0002] With the continuous improvement of people's pursuit of the quality of life, the requirements for clothing materials have become more stringent. Cotton cloth products with high whiteness, high strength and durability are widely loved by consumers. However, there are some problems in the traditional cotton cloth production process, such as unstable color, uneven dyeing which may lead to a frizzy phenomenon, poor bleaching effect, and easy fiber damage or charring during the drying process.

[0003] Problem of uneven dyeing: Existing dyeing methods usually adopt spraying or dipping methods, resulting in uneven dyeing and easy generation of a frizzy phenomenon, affecting the visual effect and comfort of the product.

[0004] Insufficient bleaching effect: The concentration of H 2 O 2 used in the traditional bleaching process is relatively low, and the bleaching effect is limited, unable to fully remove the colorant and obtain high-whiteness cotton cloth.

[0005] Drying problem: Traditional drying methods are prone to uneven heating of cotton fibers, resulting in local charring or damage, affecting the durability and feel of the product. Therefore, it is urgent to design a production process of high-whiteness refined cotton to solve the above problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a production process of high-whiteness refined cotton to solve the above deficiencies in the prior art.

[0007] To achieve the above purpose, the present invention provides the following technical solutions: A production process of high-whiteness refined cotton, comprising the following steps, S1 Material selection: Select cotton raw materials with a cotton content of more than 80%, and the fiber length is uniform; S2 Cooking: After being washed with water, adopt steam cooking technology, control the cooking temperature T at 50°C to 60°C, and maintain the cooking time for 30 minutes to 40 minutes; S3 Bleaching: When performing bleaching treatment, use H 2 O 2 bleaching agent, control the bleaching concentration at 1.8% to 2.0%, and the bleaching time is 70 minutes to 80 minutes; S4 Dyeing: The dyeing process uses acid dye Cd, the dyeing temperature is set at 40°C to 60°C; the dyeing time is 3 hours to 5 hours; the dyeing uniformity is improved by the disperse dyeing technology Ds to ensure that there is no frizzy phenomenon on the fiber surface; After S5 drying and finally after dyeing, drying treatment is carried out by a hot air dryer, with the drying temperature range set at 120°C to 140°C and the drying time at 1.5 hours to 2 hours; at the same time, microwave baking technology Dk is adopted, with the microwave power density set at 500W / m² to 700W / m² and the baking time at 1.8 hours to 2.0 hours.

[0008] Preferably, the impurities in the raw cotton are controlled below 0.3%, and the impurity types include moth-eaten, damaged, and stained.

[0009] Preferably, by adjusting the steam flow ratio Qs / Qv to 1.2 - 1.4 and adding an appropriate amount of chemical cleaning agent Cq, the cleaning time is extended to 35 minutes to 45 minutes.

[0010] Preferably, high-pressure steam sterilization technology Tm is used to sterilize the cotton, with the sterilization temperature set at 120°C to 130°C and the sterilization time controlled within 5 minutes to 6 minutes.

[0011] Preferably, during the bleaching treatment, the 2 O 2 concentration of the bleaching agent is adjusted according to the different grades of cotton. The concentration for the first-grade cotton is set at 1.8% to 1.9%, and the second-grade concentration is set at 1.9% to 2.0%.

[0012] Preferably, the dyeing temperature of the acid dye Cd is set at 45°C to 55°C, and the dyeing time is controlled within 4 hours to 4.5 hours to ensure the dyeing uniformity.

[0013] Preferably, an appropriate amount of additives, such as a slow color agent or a dispersing agent, is added during the dyeing process of the acid dye Cd to prevent fuzziness and improve the dyeing effect.

[0014] Preferably, based on the dyeing temperature of the acid dye Cd set at 40°C to 60°C, a staged dyeing technique is adopted. The first-stage dyeing time is controlled within 2 hours to 3 hours, and the second-stage dyeing time is controlled within 1 hour to 2 hours.

[0015] Preferably, the microwave baking technology Dk uses a microwave power density set at 600W / m² to 650W / m², the baking time is 1.8 hours to 2.0 hours, and X-ray analysis is used to ensure uniform heating of the cotton fibers and avoid local charring.

[0016] Preferably, the microwave baking technology Dk uses dual-band microwaves with frequencies of 2450MHz and 2850MHz respectively to improve the heating efficiency and uniformity of the cotton fibers.

[0017] In the above technical solution, a production process of high-whiteness refined cotton provided by the present invention is as follows: 1. High whiteness: By optimizing the bleaching process and dyeing uniformity, a product with high whiteness is obtained, meeting the needs of modern consumers for color purity; 2. High strength and durability: The microwave baking technology and the disperse dyeing technology ensure the integrity of cotton fibers and uniform heating, enhancing the anti-wrinkle, anti-tearing and other properties of the product; 3. Color stability: By controlling the dyeing temperature and time, the phenomenon of fluffiness is avoided, improving the visual effect and comfort of the product; 4. Extended life: The high-pressure steam sterilization technology and the disperse dyeing technology effectively prevent fiber damage and extend the service life of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings.

[0019] Figure 1 It is a schematic flow chart provided for an embodiment of the production process of high-whiteness refined cotton of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the following will further introduce the present invention in detail with reference to the drawings.

[0021] As Figure 1 shown, a production process of high-whiteness refined cotton provided by an embodiment of the present invention includes the following steps: S1 Material selection: Select cotton raw materials with a cotton content of more than 80%, and the fiber length is uniform; S2 Cooking: After being washed with water, use the steam cooking technology, control the cooking temperature T at 50°C to 60°C, and maintain the cooking time for 30 minutes to 40 minutes; S3 Bleaching: When performing the bleaching treatment, use H 2 O 2 bleaching agent, control the bleaching concentration at 1.8% to 2.0%, and the bleaching time is 70 minutes to 80 minutes; S4 Dyeing: The dyeing process uses acid dye Cd, the dyeing temperature is set at 40°C to 60°C; the dyeing time is 3 hours to 5 hours; the disperse dyeing technology Ds is used to improve the dyeing uniformity and ensure that there is no fluffiness on the fiber surface; After S5 drying and finally after dyeing, drying treatment is carried out by a hot air dryer, the set drying temperature range is 120°C to 140°C, and the drying time is 1.5 hours to 2 hours; at the same time, microwave baking technology Dk is adopted, the set microwave power density is 500W / m² to 700W / m², and the baking time is 1.8 hours to 2.0 hours.

[0022] Preferably, the impurities in the raw cotton are controlled below 0.3%, and the impurity types include moth-eaten, damaged and stained.

[0023] Preferably, by adjusting the steam flow ratio Qs / Qv to 1.2 - 1.4 and adding an appropriate amount of chemical cleaning agent Cq, the cleaning time is extended to 35 minutes to 45 minutes.

[0024] Preferably, high-pressure steam sterilization technology Tm is used to sterilize the cotton, the sterilization temperature is set at 120°C to 130°C, and the sterilization time is controlled within 5 minutes to 6 minutes.

[0025] Preferably, during the bleaching treatment, the 2 O 2 concentration of the bleaching agent is adjusted according to the different grades of cotton. The concentration for the first-grade cotton is set at 1.8% to 1.9%, and the second-grade concentration is set at 1.9% to 2.0%.

[0026] Preferably, the dyeing temperature of the acid dye Cd is set at 45°C to 55°C, and the dyeing time is controlled within 4 hours to 4.5 hours to ensure the dyeing uniformity.

[0027] Preferably, an appropriate amount of auxiliary agents, such as a color retarder or a dispersing auxiliary agent, are added during the dyeing process of the acid dye Cd to prevent fuzziness and improve the dyeing effect.

[0028] Preferably, on the basis that the dyeing temperature of the acid dye Cd is set at 40°C to 60°C, a staged dyeing technology is adopted. The dyeing time for the first stage is controlled within 2 hours to 3 hours, and the dyeing time for the second stage is controlled within 1 hour to 2 hours.

[0029] Preferably, the microwave baking technology Dk adopts a microwave power density set at 600W / m² to 650W / m², the baking time is 1.8 hours to 2.0 hours, and X-ray analysis is used to ensure uniform heating of the cotton fibers and avoid local charring.

[0030] Preferably, the microwave baking technology Dk adopts dual-band microwaves with frequencies of 2450MHz and 2850MHz respectively to improve the heating efficiency and uniformity of the cotton fibers.

[0031] Example 1 Based on the above process method, the cotton content of the selected cotton raw material is controlled above 85%.

[0032] The cooking temperature is controlled at 55°C to 58°C, and the cooking time is extended to 35 minutes to 45 minutes; the steam flushing technology is adjusted so that the steam flow rate ratio is increased to 1.2 times.

[0033] The concentration of the bleaching agent is adjusted to 2.0%, the bleaching time is 75 minutes to 85 minutes, and the bleaching effect index reaches the H 2 O 2 bleaching end point index.

[0034] The acid dye adopts the disperse dyeing process, and the dyeing time is extended to 4 hours to 6 hours, and the dyeing uniformity meets the requirements.

[0035] The drying temperature is set at 130°C to 140°C, and the drying time is extended to 2.0 hours to 2.2 hours; the microwave drying technology is used to further improve the drying efficiency and uniformity of the cotton cloth products.

[0036] Example 2 Based on the above process method, a neutral bleaching agent is used to replace the H 2 O 2 bleaching agent, and the bleaching effect remains unchanged.

[0037] During the cooking process, an appropriate amount of chemical cleaning agent is added, and the cleaning time is extended to 35 minutes to 45 minutes; the steam flushing technology is adjusted so that the steam flow rate ratio is increased to 1.3 times.

[0038] The dyeing process adopts the disperse dyeing technology, and the dyeing temperature is extended to 60°C to 80°C.

[0039] During the drying process, the microwave baking technology is adopted, and the microwave power density is set at 500W / m² to 700W / m²; the baking time is 1.8 hours to 2.0 hours.

[0040] Example 3 Based on the above process method, the cotton content of the selected cotton raw material is controlled below 75%.

[0041] The cooking temperature is controlled at 53°C to 56°C, and the cooking time is maintained at 32 minutes to 42 minutes; the steam flushing technology is adjusted so that the steam flow rate ratio is reduced to 1.1 times.

[0042] The concentration of the bleaching agent is adjusted to 1.8%, the bleaching time is 70 minutes to 80 minutes; the bleaching end point index meets the requirements.

[0043] The acid dyeing process adopts the disperse dyeing technology, and the dyeing temperature is extended to 65°C to 75°C.

[0044] During the drying process, a natural air circulation cooling method is adopted, the set drying temperature range is from 125°C to 135°C, and the drying time is from 1.9 hours to 2.0 hours; the drying efficiency is optimized by adjusting the ventilation volume.

[0045] Only some exemplary embodiments of the present invention are described above by way of illustration. Undoubtedly, for those of ordinary skill in the art, various different ways can be used to modify the described embodiments without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A production process for high-whiteness refined cotton, characterized in that: The following steps are included: S1 Material selection: Select cotton raw materials with a cotton content of more than 80% and uniform fiber length; S2 is steamed and washed, and then steamed to control the cooking temperature (T) at 50°C to 60°C and maintain the cooking time at 30 to 40 minutes; S3 bleaching: When bleaching, use H2O2 bleaching agent, the bleaching concentration is controlled at 1.8% to 2.0%, and the bleaching time is 70 minutes to 80 minutes; S4 dyeing and dyeing process uses acid dyes (Cd), and the dyeing temperature is set at 40°C to 60°C; the dyeing time is 3 hours to 5 hours; the dispersion dyeing technology (Ds) is used to improve the dyeing uniformity and ensure that there is no frizz on the fiber surface; S5 drying and finally dyeing, the fabric is dried in a hot air dryer, with the drying temperature set at 120°C to 140°C and the drying time at 1.5 to 2 hours; at the same time, microwave baking technology (Dk) is used, with the microwave power density set at 500W / m² to 700W / m² and the baking time at 1.8 to 2.0 hours.

2. The production process of high-whiteness refined cotton according to claim 1, characterized in that: The impurities in the raw cotton are controlled below 0.3%, and the types of impurities include insect bites, stains and stains.

3. The production process of high-whiteness refined cotton according to claim 1, characterized in that: By adjusting the steam flow ratio (Qs / Qv) to 1.2-1.4 and adding an appropriate amount of chemical cleaning agent (Cq), the cleaning time can be extended to 35-45 minutes.

4. The production process of high whiteness refined cotton according to claim 1, characterized in that: The cotton was sterilized by high pressure steam sterilization technology (Tm), the sterilization temperature was set at 120°C to 130°C, and the sterilization time was controlled at 5 minutes to 6 minutes.

5. The production process of high whiteness refined cotton according to claim 1, characterized in that: During the bleaching treatment, the concentration of the H2O2 bleaching agent is adjusted according to the different grades of cotton. The concentration of the first grade cotton is set at 1.8% to 1.9%, and the concentration of the second grade cotton is set at 1.9% to 2.0%.

6. The production process of high whiteness refined cotton according to claim 1, characterized in that: The dyeing temperature of the acid dye Cd is set at 45°C to 55°C, and the dyeing time is controlled at 4 hours to 4.5 hours to ensure dyeing uniformity.

7. The production process of high-whiteness refined cotton according to claim 1, characterized in that: The acid dye Cd is added with a proper amount of auxiliary agent during the dyeing process, such as a slow-in dye or a dispersing auxiliary agent, to prevent frizziness and improve the dyeing effect.

8. The production process of high whiteness refined cotton according to claim 1, characterized in that: The acid dye Cd is dyed at a temperature of 40°C to 60°C and adopts a staged dyeing technology, wherein the dyeing time of the first stage is controlled at 2 to 3 hours, and the dyeing time of the second stage is controlled at 1 to 2 hours.

9. The production process of high-whiteness refined cotton according to claim 1, characterized in that: The microwave baking technology Dk adopts a microwave power density set to 600W / m² to 650W / m², a baking time of 1.8 hours to 2.0 hours, and uses X-ray analysis to ensure that the cotton fibers are evenly heated to avoid local burning.

10. The production process of high-whiteness refined cotton according to claim 1, characterized in that: The microwave baking technology Dk adopts dual-band microwaves with frequencies of 2450 MHz and 2850 MHz respectively to improve the heating efficiency and uniformity of the cotton fibers.

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