Environment-friendly fading and washing process method for cotton and wool blended jean fabric
By using environmentally friendly technologies such as enzyme washing, cold bleaching enzyme treatment, and laser treatment, the problem of traditional denim fabric washing damaging wool has been solved, achieving an environmentally friendly and efficient fading effect, preserving the function of wool and giving it a nostalgic style.
Patent Information
- Application Number
- CN202511085178.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-04
- Publication Date
- 2025-11-18
AI Technical Summary
Traditional denim washing processes damage wool fibers, resulting in a decrease in the proportion of wool content. They are also environmentally unfriendly, consuming large amounts of water and chemicals and producing wastewater and sludge.
It adopts environmentally friendly enzyme washing, cold bleaching enzyme treatment, laser treatment and atomized solution technology to replace traditional stone washing and potassium permanganate bleaching. It protects wool fibers through biological enzymes and laser technology to achieve environmentally friendly fading.
It retains the wool content and function to the maximum extent, gives denim fabric a retro texture and style, reduces the use of water and chemicals, reduces environmental pollution, and enhances the contrast between light and dark colors.
Smart Images
Figure CN120967705A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the field of fading water washing technology, in particular to an environmentally-friendly fading water washing process of cotton-wool blended denim fabric. BACKGROUND
[0002] The cotton-wool blended denim fabric is limited by the unique properties of wool in the traditional washing process. The wool content of the current wool denim pants on the market is reduced due to the damage of traditional washing process. Since wool fibers are more expensive than cotton fibers, the price of wool blended fabric will be higher. Wool blended finished garments are usually only subjected to simple dark water washing such as general washing and enzyme washing. The reason is that wool is a protein fiber. The chemical such as sodium hypochlorite, which is commonly used in the traditional denim washing process, is a strong oxidizing agent that can dissolve and corrode all protein fibers. At the same time, the stone washing process in the traditional washing process causes severe fiber friction, which causes wool fibers to easily fall off and pill from the blended yarn, further reducing the quality and function of wool blended denim.
[0003] In addition, the traditional denim washing process consumes a large amount of water, chemicals and steam, and produces a large amount of wastewater and sludge, which does not meet the needs of sustainable and environmentally-friendly development.
[0004] Wool fibers have natural, warm, antibacterial, moisture-absorbing and other advantages, especially in winter clothing. Wool is an excellent hydrophilic fiber that can absorb and release water under various temperature and humidity conditions, keeping the air humidity around the skin low and providing a comfortable wearing experience. The natural crimp structure of wool fibers forms an air barrier, providing excellent warmth; at the same time, it has good air permeability, which can effectively remove body sweat and keep the inside of the garment dry and comfortable. Wool has anti-static properties, and its chemical structure makes it naturally antibacterial and mite-resistant, effectively inhibiting bacterial growth and absorbing odors. Wool is easily biodegradable in soil, in line with the concept of sustainable development.
[0005] Denim fabric has become a favorite in the fashion world with its wear-resistant, durable properties, and unique washing appearance and hand feel. Denim fabric is usually made of long-staple cotton, which has a rough fiber and is treated with a special process to have high wear resistance and durability. The warp yarn of denim fabric is generally dyed with indigo to present a deep blue color, and the weft yarn is kept white, and the weave structure is generally twill.
[0006] The washing process of denim fabric can make it have a unique nostalgic feeling and unique texture style. Common washing processes include general washing, stone washing, enzyme washing, bleaching, and snowflake frying. These processes produce wear and tear and fading effects on the fabric surface through different chemical and physical processes, adding diversity and fashion to denim fabric, making denim pants look like they have been worn for a long time.
[0007] Traditional washing process needs to use volcanic rock to wash the finished garment with stone grinding process, the finished garment and the stone rub in the drum washing equipment for a long time to form the special washing and fading style of the finished garment, the pumice stone will wear the fabric during the washing process, at the same time, it will become smaller and finally become the main component of sludge. Chlorine bleaching process is to use the oxidation of sodium hypochlorite to destroy the structure of indigo dye, so as to achieve the purpose of fading. Because of its strong effect and the color development of chloride ion, the cloth is easy to yellow after bleaching, the fading effect of chlorine bleaching is rough, and it is mainly used for bleaching of indigo cotton denim.
[0008] The warp yarn of denim fabric usually needs to be dyed, and the commonly used indigo dye is mainly for cellulose fiber, and has no good dyeing property for wool. Usually, the warp yarn of cotton-wool blended fabric is cotton, and the weft yarn of the fabric is wool or wool-cotton blend. At the same time, the weft yarn mainly contacts the skin, and the moisture absorption and antibacterial properties of wool can also maximize its function. SUMMARY
[0009] The purpose of the present application is to provide an environmentally friendly fading and washing process for cotton-wool blended denim fabric, which realizes the use of traditional washing stone grinding, bleaching process and high potassium permanganate process in the washing process, avoids the damage of wool fiber, and can maximize the retention of wool components and functions, while also giving ordinary jeans unique nostalgic texture and style.
[0010] To achieve the above purpose, the present application provides the following technical scheme: an environmentally friendly fading and washing process for cotton-wool blended denim fabric, comprising the following steps: step one, desizing and washing the cotton-wool blended denim fabric to be treated; step two, enzyme washing after desizing and washing; step three, preliminary laser treatment after enzyme washing; step four, cold bleaching enzyme treatment after preliminary laser treatment; step five, hair removal treatment after cold bleaching enzyme treatment; step six, using atomized solution for atomization treatment after hair removal treatment, the liquid content of the fabric after atomization treatment is 50-65%; step seven, drying after atomization treatment, and laser treatment again; step eight, neutralization treatment after laser treatment again; step nine, dehydration after neutralization treatment to complete the fading and washing process.
[0011] This process avoids the use of traditional denim washing stone grinding and bleaching process, achieves the traditional stone grinding and bleaching denim blue color under the premise of protecting wool denim fiber, and avoids the use of traditional process pumice stone, bleaching water, caustic soda and potassium permanganate solution, and uses environmentally friendly enzyme washing, which is of great environmental significance.
[0012] Preferably, step one includes: the cotton wool blended denim fabric to be treated is treated with a bath ratio of 1:5-6, 0.3-0.6 g / L of resist powder, 0.8-1.2 g / L of soap oil, and then the system is heated to 40-60°C for desizing washing, the desizing washing time is 8-15 minutes, and finally the fabric is washed 1-5 times with clean water.
[0013] Preferably, the enzyme washing includes: using a bath ratio of 1:5-7, heating the system to 40-50°C, adding 0.3-0.6 g / L of resist powder, 0.8-1.2 g / L of soap oil, and 0.5-1 g / L of neutral enzyme powder for enzyme washing, the enzyme washing time is 15-25 minutes, and finally the fabric is washed 1-5 times with clean water. The enzyme washing improves the loftiness and moisture absorption of the fabric through the action of biological enzymes, and at the same time improves the surface light and shade contrast style of the fabric, preparing for the next step of atomized bleaching process.
[0014] Preferably, the preliminary laser treatment includes: using a bath ratio of 1:3-7, adding a laser promoter for preliminary laser treatment, and the power of the preliminary laser treatment is 32 / 45 and the power of the detail enhancement layer is 32 / 50.
[0015] Preferably, the cold bleaching enzyme treatment includes: using a bath ratio of 1:4-7, adding 5-15 g / L of cold bleaching enzyme, cold bleaching enzyme treatment for 8-16 minutes, and finally washing the fabric 1-3 times with clean water. The cold bleaching enzyme is the third generation of laccase, which is a special enzyme that only acts on indigo dye. It can decompose indigo in cold water and has a certain effect of stripping.
[0016] Preferably, the hair removal treatment includes: using a bath ratio of 1:4-7, adding 0.7-1.3 g / L of soap oil, 0.2-0.8 g / L of glacial acetic acid, and 0.7-1.3 g / L of neutral enzyme water, and treating at 40-50°C for 8-15 minutes, and finally washing the fabric 1-5 times with clean water to remove the moisture in the fabric.
[0017] Preferably, the formula of the atomized solution is: 20-22% of oxygen bleaching agent, 3-3.2% of catalyst, 0.1-0.3% of hydrogen peroxide, and the rest is water. The oxygen bleaching agent is an organic environmentally friendly alternative to bleaching water, which can strip indigo dye. It is uniformly distributed on the surface of the fabric by atomization, rather than in the bath. Since wool is mainly on the back weft, it can relatively reduce the damage to wool. Since the atomized reagent can be accurately configured according to the weight of the fabric, it can reduce the use of a large amount of water and chemicals, and has environmental value.
[0018] Preferably, the atomization treatment includes: adding the atomization solution into an atomization device, placing the cotton wool blended denim fabric into the atomization device, setting the rotating speed to 20-30 revolutions per minute, forward and reverse rotation and single 40-50 seconds, starting the atomization device to spray the atomization solution after rotating for 1-5 minutes, continuing to rotate for 4-8 minutes to absorb the residual atomization solution in the absorption roller, taking out the fabric to dry and cold treatment.
[0019] Preferably, the fire of the re-laser treatment is 32 / 32, and the laser pattern is self-designed, which can replace the traditional PP spraying weighting process and is used for the contrast requiring special white.
[0020] Preferably, the neutralization treatment includes: adopting a bath ratio of 1:4-7, heating to 40-50 DEG C, adding 1-3 g / L of pyrolytic, 0.5-1.2 g / L of soap oil and 0.2-0.8 g / L of neutral enzyme water, neutralizing for 10-15 minutes, and finally washing 1-4 times with clean water.
[0021] Preferably, after the neutralization treatment, a certain proportion of softening and fluffy cotton agent is added before the dehydration treatment.
[0022] Compared with the prior art, the application has the beneficial effects that:
[0023] 1. The environmental-friendly fading and washing process of the cotton wool blended denim fabric can avoid the damage of wool fibers by not using the traditional stone washing, rinsing process and potassium permanganate spraying process in the washing process, can maximize the retention of the composition and function of wool, and can also endow ordinary denim with unique nostalgic texture and style;
[0024] 2. The environmental-friendly fading and washing process of the cotton wool blended denim fabric can improve the light and shade contrast effect of the fabric, reduce the stone washing time and even avoid the use of pumice, avoid the corrosion of strong oxidizing agents such as potassium permanganate to the fabric, reduce the risk of large order production and the environmental problem of pumice residue;
[0025] 3. The environmental-friendly fading and washing process of the cotton wool blended denim fabric can realize the realistic denim nostalgic effect, replace the traditional potassium permanganate spraying process, and achieve high sand position whiteness and naturalness. BRIEF DESCRIPTION OF DRAWINGS
[0026] Figure 1 It is a schematic diagram of the pattern and fire of the preliminary laser treatment in the embodiment one of the application;
[0027] Figure 2 It is a schematic diagram of the detail weighting fire of the preliminary laser treatment in the embodiment one of the application;
[0028] Figure 3The pattern and fire power schematic diagram for the second laser treatment in the embodiment one of the present application;
[0029] Figure 4 The fabric physical comparison diagram after the preliminary laser treatment and the atomization treatment in the embodiment one of the present application;
[0030] Figure 5 The fabric physical comparison diagram after the second laser treatment and the preliminary laser treatment in the embodiment one of the present application;
[0031] Figure 6 The fabric physical comparison diagram after the desizing washing and the enzyme washing and after the treatment in the embodiment one of the present application. DETAILED DESCRIPTION
[0032] The technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the present application.
[0033] It should be noted that the wool blended jean fabric used for the test of the present application is 79% cotton, 20% wool and 1% Lycra, which can represent relatively wide wool blended jean products.
[0034] Embodiment one
[0035] An environment-friendly fading water washing process method of a cotton wool blended jean fabric, comprising:
[0036] Step one: desizing washing: the cotton wool blended jean fabric to be treated is placed into a low bath ratio washing water equipment, the bath ratio is 1:5, 0.5 g / L of resist powder and 1 g / L of soap oil are added, the system is heated to 50 DEG C, the machine is rotated for 10 minutes and then the water is drained, and the fabric is washed with clean water twice.
[0037] Step two: enzyme washing: the bath ratio is set to 1:5, the system is heated to 45-50 DEG C, 0.5 g / L of resist powder, 1 g / L of soap oil and 0.6 g / L of neutral enzyme powder are added, and the system is operated for 20 minutes. The fabric is washed with clean water twice. The effect of the biological enzyme improves the bulkiness and moisture absorption performance of the fabric, and improves the surface light and shade contrast style of the fabric, which prepares for the next atomization bleaching process.
[0038] Step three: the bath ratio is set to 1:4, 30 g / L of laser promoter is added, and then the fabric is dehydrated and dried, wherein the laser promoter is IVC auxiliary agent of Dongguan Zhongfeng Textile Material Co., Ltd.
[0039] Step four: preliminary laser treatment: the laser pattern is as shown in Figure 1 , Figure 1 The fire power is 32 / 45,Figure 2 For the layer of emphasis on details, firepower 32 / 50, it should be noted that the laser treatment this time is a way to provide a nostalgic style of fabric, the pattern is self-created.
[0040] Step five: cold bleaching enzyme treatment: set the bath ratio 1:5, add cold bleaching enzyme 8g / L, turn 10 minutes, water once, among them, cold bleaching enzyme is the third generation of laccase, which is a special enzyme only for indigo dye, which can decompose indigo in cold water environment, and plays a certain role in stripping.
[0041] Step six: hair removal: set the bath ratio 1:5, add 1g / L of oil, 0.5g / L of glacial acetic acid, 1g / L of neutral enzyme water, 45 degrees for 10 minutes, water twice, dry clothes, among them, neutral enzyme adopts cellulase preparation.
[0042] Step seven: configure the atomized solution, the ratio is 540g of oxygen bleaching agent, 81g of catalyst, 3g of hydrogen peroxide, and 2000g of water, the oxygen bleaching agent adopts evanix oxygen bleaching agent of Zhuhai Jianming Group Ji Men Chemical Industry, the catalyst adopts booster catalyst of Zhuhai Jianming Group Ji Men Chemical Industry, and the oxygen bleaching agent adopts an organic environmental protection substitute bleaching agent, which can strip indigo dye, and is evenly distributed on the surface of the fabric by atomization, rather than in the bath. Because wool is mainly on the back weft, it can relatively reduce the damage to wool. Because the atomized reagent can be accurately configured according to the weight of the fabric according to the liquid content rate, it can relatively reduce the use of a large amount of water and chemicals, and has environmental protection value.
[0043] The atomized solution is added to the atomization equipment B-CLOUD, 4kg of hair-removed cotton wool blended denim fabric to be treated is put into the roller, the rotation speed is set to 25 revolutions per minute, forward and reverse rotation, single 45 seconds.
[0044] After the fabric rotates in the roller for 2 minutes, start the atomization equipment, continue to rotate for 5 minutes to absorb the residual atomized reagent in the roller, as shown in Figure 4 The effect comparison chart after preliminary laser treatment and atomization treatment.
[0045] Take out the fabric, the liquid content rate of the fabric is 50-65%, put it into the oven for drying, the drying temperature is 75℃, the time is 30 minutes, and the cold separation treatment is 5 minutes, as shown in Figure 4 The effect after atomization treatment can be seen.
[0046] Step eight: laser treatment again, the laser pattern is as shown in Figure 3 Adjust the mode to PP mode on the laser equipment, set the firepower to 32 / 32, as shown in Figure 5 The pattern comparison after two laser treatments is very obvious.
[0047] Step nine: neutralization: set the bath ratio to 1:5, warm up to 45°C, add pyrite 2g / L, camphor oil 1g / L, neutral enzyme water 0.5g / L, rotate for 10 minutes, and rinse with clean water twice. It should be noted that the laser pattern in the present application is designed independently and can replace the traditional PP spraying process. It is used for special white contrast. By selecting the part that needs high whiteness for processing.
[0048] Step ten: add soft fluffy cotton agent 10g / L, dehydrate and dry the clothes.
[0049] Comparative example one
[0050] The traditional process of spraying potassium permanganate solution includes:
[0051] 1. Prepare the initial chemical agent solution, which is composed of potassium permanganate powder and phosphoric acid. The chemical formula of potassium permanganate is KMnO4, and the chemical formula of phosphoric acid is H3PO4. In terms of mass fraction, 1 part of potassium permanganate and 1 part of phosphoric acid are mixed with 10 parts of water to prepare the initial chemical agent solution.
[0052] 2. Prepare the solution to be operated: according to the target requirements, dilute the initial chemical agent solution with water in proportion. Specifically, 1 part of the initial chemical agent solution and 3 parts of water are mixed as the solution to be operated.
[0053] 3. Spray liquid: use the misting spray gun to spray the solution to be operated to the designated position of the fabric (such as the hand rubbing position, etc.).
[0054] 4. Reaction: the solution to be operated and the surface dye of the fabric (usually indigo and sulfur) react fully.
[0055] 5. Neutralization and washing: put the fabric into the washing device and add a reducing agent, which is sodium pyrosulfite. Wash for 5 minutes at room temperature and rinse twice with clean water.
[0056] In summary, the present application is different from the chemical reaction process of spraying potassium permanganate. The laser mainly relies on the different frequency laser beams emitted by the laser device according to the laser pattern to generate heat on the fabric, causing the dye to vaporize and evaporate. The effect of laser is mainly realized by the design of laser pattern and the setting of laser device parameters to achieve the same purpose as the traditional process using potassium permanganate, such as Figure 6 As shown in the figure, the fabric pattern processed by the process of the present application achieves the effect of the traditional process using potassium permanganate.
[0057] The methods used in the present application are conventional methods in the field unless otherwise specified.
[0058] The above is only the preferred embodiment of the present application, and does not limit the present application, and any simple modification, change and equivalent transformation of the above embodiment according to the technical essence of the present application still belongs to the protection scope of the technical scheme of the present application.
Claims
1. An environmentally friendly fading and washing process for cotton-wool blend denim fabric, characterized in that, include: Step 1: Desizing and washing the cotton-wool blend denim fabric to be treated; Step 2: After desizing and washing, perform enzyme washing; Step 3: After enzyme washing, perform preliminary laser treatment; Step 4: After preliminary laser treatment, perform cold bleaching enzyme treatment; Step 5: After cold bleaching and enzyme treatment, perform hair removal. Step Six: After the depilatory treatment, the fabric is atomized with a misting solution. After the misting treatment, the liquid content of the fabric is 50-65%. Step 7: After atomization and drying, perform laser treatment again; Step 8: Perform a second laser treatment to refine and neutralize the neutralization process; Step 9: After neutralization treatment, dehydration completes the fading and washing process.
2. The environmentally friendly fading and washing process for cotton-wool blended denim fabric according to claim 1, characterized in that, Step one includes: using a liquor ratio of 1:5-6, adding 0.3-0.6g / L of anti-dyeing powder and 0.8-1.2g / L of lye oil to the cotton-wool blend denim fabric to be treated, then heating the system to 40-60℃ for desizing and washing for 8-15 minutes, and finally washing with clean water 1-5 times.
3. The environmentally friendly fading and washing process for cotton-wool blended denim fabric according to claim 1 or 2, characterized in that, The enzyme wash includes: using a bath ratio of 1:5-7, heating the system to 40-50℃, adding 0.3-0.6g / L of anti-dyeing powder, 0.8-1.2g / L of lye oil, and 0.5-1g / L of neutral enzyme powder for enzyme washing, with an enzyme washing time of 15-25 minutes, and finally rinsing with clean water 1-5 times.
4. The environmentally friendly fading and washing process for cotton-wool blend denim fabric according to claim 1, characterized in that, The preliminary laser treatment includes: using a bath ratio of 1:3-7 and adding a laser accelerator for preliminary laser treatment.
5. The environmentally friendly fading and washing process for cotton-wool blended denim fabric according to claim 1, characterized in that, The cold bleaching enzyme treatment includes: using a bath ratio of 1:4-7, adding 5-15 g / L of cold bleaching enzyme, treating with cold bleaching enzyme for 8-16 minutes, and finally washing with clean water 1-3 times.
6. The environmentally friendly fading and washing process for cotton-wool blend denim fabric according to claim 1, wherein the lint removal treatment includes: Use a liquor ratio of 1:4-7, add 0.7-1.3g / L of lye oil, 0.2-0.8g / L of glacial acetic acid, and 0.7-1.3g / L of neutral enzyme water, treat at 40-50℃ for 8-15 minutes, and finally wash with clean water 1-5 times to remove the moisture from the fabric.
7. The environmentally friendly fading and washing process for cotton-wool blended denim fabric according to claim 1, characterized in that, The atomizing solution is formulated as follows (by mass): 20-22% oxygen bleaching agent, 3-3.2% catalyst, 0.1-0.3% hydrogen peroxide, and the remainder is water.
8. The environmentally friendly fading and washing process for cotton-wool blend denim fabric according to claim 1, characterized in that, The atomization process includes: adding the atomizing solution to the atomizing equipment, placing the cotton-wool blend denim fabric into the atomizing equipment, setting the rotation speed to 20-30 revolutions per minute, rotating in both directions for 40-50 seconds at a time, and starting the atomizing equipment after 1-5 minutes to spray out the atomizing solution. After spraying, continue rotating for 4-8 minutes to absorb the residual atomizing solution in the roller. After removing the fabric, dry it and then perform a cold treatment.
9. The environmentally friendly fading and washing process for cotton-wool blended denim fabric according to claim 1, characterized in that, The neutralization process includes: using a bath ratio of 1:4-7, heating to 40-50℃, adding 1-3g / L of pyroxene, 0.5-1.2g / L of lye oil, and 0.2-0.8g / L of neutral enzyme water, neutralizing for 10-15 minutes, and finally washing with clean water 1-4 times.
10. The environmentally friendly fading and washing process for cotton-wool blend denim fabric according to claim 1, characterized in that, Before dehydration after neutralization, a certain proportion of softening and fluffing agent is added before dehydration.