Low-temperature low-alkali scouring agent and application thereof

Abstract

The invention belongs to the field of textile fabric dyeing and finishing, and particularly discloses a low-temperature low-alkali scouring agent and application thereof. The low-temperature low-alkali scouring agent comprises the following components in percentage by mass: 25%-30% of polyethylene glycol, 15%-30% of fatty alcohol-polyoxyethylene ether, 5%-10% of lauryl ether sodium sulfate, 5%-10% of diethylene glycol monobutyl ether, 15%-20% of a copper porphyrin complex and the balance of water. According to the low-temperature low-alkali scouring agent, the copper porphyrin complex is added into the components, so that the scouring agent has the functions of a traditional scouring agent and also has the effects of activating hydrogen peroxide to decompose at low temperature and reducing the pH value after scouring and cooling, and therefore, scouring under low-temperature and low-alkali conditions can be realized; the whiteness and the hydrophilicity under the traditional pretreatment process are achieved; after refining, the pH value is close to neutral, and water washing and neutralization are not needed.

Description

Technical Field

[0001] The present application belongs to the field of textile fabric dyeing and finishing, and more specifically, relates to a scouring and bleaching process for cellulose fiber textile products. Background Art

[0002] At present, cellulose fibers such as cotton and their blended fabrics occupy the main market share in the world market. In order to meet the requirements of subsequent dyeing and achieve uniform and stable dyeing, such fabrics need to be scour-bleached. The traditional scouring and bleaching process needs to be carried out under high temperature and high alkalinity conditions. During the process, caustic soda, hydrogen peroxide, scouring agents, stabilizers and chelating dispersants need to be added. After scouring and bleaching, due to the high alkalinity, water washing, neutralization and deoxygenation are required to achieve the whiteness, gross effect and pH value required for dyeing. The whole process requires 4 water treatments. The overall process takes a long time, uses a large amount of chemical additives, consumes a lot of energy, discharges a large amount of sewage, and has high production costs.

[0003] In a broad sense, the chemicals such as acids, alkalis, oxidants, reducing agents and various surfactants added during the scouring process can be called scouring agents. However, in the textile industry, scouring agents are generally used in a narrow sense, mainly referring to various anionic and nonionic surfactants and appropriate additives, which are obtained by a certain ratio method. A compound with a washing effect as the main function and synergistic effects such as penetration, emulsification, dispersion and complexation. The main function of traditional scouring agents in scouring is to promote the penetration of alkali agents and hydrogen peroxide into fabrics and yarns under high temperature conditions, and enter the wax layer on the fiber surface and into the fiber, so that the wax swells and destroys the pigment chromophore, thereby fully removing wax, oil, pigment and cottonseed shell, etc., giving the fabric or yarn sufficient hydrophilicity and whiteness, and laying the foundation for subsequent uniform and stable dyeing. This process needs to be carried out under high temperature and high alkali conditions. Because hydrogen peroxide decomposes quickly under high temperature and high alkali conditions, in order to avoid local hydrogen peroxide decomposition too quickly and cause fiber damage, it is necessary to add additional hydrogen peroxide stabilizers and chelating dispersants. In addition, due to the high alkalinity and residual hydrogen peroxide, it is necessary to wash, neutralize and deoxygenate after scouring to reduce the pH value to the neutral required for dyeing and remove all residual hydrogen peroxide. Therefore, the traditional pre-treatment process is energy-intensive, water-intensive and time-consuming.

[0004] In order to overcome the defects of the traditional pre-treatment process, technicians have also explored the processes of some low-temperature refining agents. For example, patent document CN115807340A discloses a low-temperature refining agent and its preparation method and application. The low-temperature refining agent comprises secondary alcohol polyoxyethylene ether, isomeric tridecanol polyoxyethylene polyoxypropylene ether, fatty acid methyl ester polyoxyethylene ether, surfactant and anti-coagulant, which can scour the cloth at low temperature. However, since the low-temperature refining agent is only a mixture of various surfactants with degreasing and emulsifying capabilities, it has a good effect of removing and emulsifying the oil wax on the fabric at low temperature, but has no activation effect on hydrogen peroxide. When the fabric has whiteness requirements, due to insufficient temperature, the activation degree of hydrogen peroxide is insufficient, and the degree of oxidation of the pigment on the fabric is insufficient, and sufficient whiteness cannot be obtained, thereby failing to meet the dyeing requirements of medium and light colors and bright colors, so this type of low-temperature refining agent has great limitations in production. In addition, this type of scouring agent is used in the scouring process of cotton fabrics, and more caustic soda needs to be added to achieve the effect of low-temperature scouring. Due to the high alkalinity of scouring, a large amount of water washing and neutralization is required after refining. Therefore, this type of scouring agent can reduce the temperature and save energy to a certain extent, but it cannot reduce water consumption and sewage discharge. Summary of the invention

[0005] In view of the defects of the prior art, the purpose of the present application is to solve the problem of low-temperature and low-alkali scouring of light-colored and bright textile products by improving the formula of low-temperature and low-alkali scouring agents.

[0006] To achieve the above-mentioned purpose, the present application provides a low-temperature and low-alkali scouring agent, which includes, by mass fraction, 25% to 30% of polyethylene glycol, 15% to 30% of fatty alcohol polyoxyethylene ether, 5% to 10% of sodium lauryl ether sulfate, 5% to 10% of diethylene glycol butyl ether, 15% to 20% of copper porphyrin complex and the remainder of water.

[0007] Preferably, the average molecular weight of the polyethylene glycol is 3400-4200.

[0008] Preferably, the molecular formula of the fatty alcohol polyoxyethylene ether is RO(CH2CH2O) n H, where R is C 12 -C 14 The alkyl group of the present invention is alkyl, and n is 15 or 16.

[0009] Another object of the present application is to provide a scouring aqueous solution comprising 1 g / L to 1.5 g / L of the above-mentioned low-temperature and low-alkali scouring agent.

[0010] Preferably, the scouring aqueous solution further comprises 1 g / L to 2.5 g / L of scouring powder.

[0011] Preferably, the refined powder comprises 15% to 25% by mass of sodium metasilicate, 25% to 30% by mass of sodium carbonate and 50% to 55% by mass of sodium sulfate.

[0012] Preferably, the scouring aqueous solution further comprises a whitening agent in an amount of 0.25% to 0.4% by mass.

[0013] Another object of the present application is to provide a method for scouring and bleaching textile products using the above-mentioned scouring aqueous solution, comprising the following steps:

[0014] S1. treating the textile product in the scouring aqueous solution for 3 min to 5 min at a mass ratio of 1:4 to 1:10;

[0015] S2. Oxidizing the textile product treated in step S1.

[0016] Preferably, step S2 includes the following sub-steps:

[0017] S2-1: Treat the textile product with 3g / L to 4g / L H2O2 solution at 80℃ to 85℃ for 40min to 60min;

[0018] S2-2: Treat the textile product with 0.15 g / L to 0.3 g / L catalase solution at a temperature of 30°C to 50°C for 10 min to 15 min.

[0019] Preferably, the content of cellulose fibers in the textile product exceeds 10%.

[0020] Preferably, after step S2, step S3 is further included: dyeing or softening the textile product oxidized in step S2.

[0021] As further preferred, in the step S1, the scouring aqueous solution further comprises a whitening agent with a mass fraction of 0.25% to 0.4%.

[0022] In general, the above technical solutions conceived by this application have the following technical advantages compared with the prior art:

[0023] 1. The low-temperature and low-alkali scouring agent of the present application has copper porphyrin complexes added to its ingredients, so that the scouring agent has the functions of a traditional scouring agent, and has the functions of activating hydrogen peroxide decomposition at low temperatures and reducing the pH value after scouring and cooling, so that scouring under low-temperature and low-alkali conditions can be achieved, while achieving whiteness and hydrophilicity under traditional pretreatment processes; the pH value after scouring is close to neutral, and no water washing and neutralization are required; and due to low temperature and low alkali, no hydrogen peroxide stabilizer and chelating dispersant need to be added during the scouring process, thereby further reducing the use of chemical additives;

[0024] 2. By adding low-temperature and low-alkali scouring agents, the scouring temperature is reduced from 98°C in the traditional process to only 80°C to 85°C, reducing steam consumption; the flake caustic soda used in the process is replaced by scouring powder with weak alkalinity. At the same time, under the action of low-temperature and low-alkali scouring agents, the pH value of the residual liquid after scouring is close to neutral, so that there is no need for water washing and neutralization after scouring. After deoxygenation of the water, it can directly enter the dyeing stage. Compared with the traditional process, it can reduce the use of neutralizing acid, and at the same time reduce two water and corresponding operation time;

[0025] 3. With the new technology and supporting solutions, the whiteness and wool effect after scouring and bleaching reach the same level as the traditional technology. No need for washing and neutralization, only deoxygenation, the pH value is close to neutral, meeting the dyeing requirements;

[0026] 4. Compared with the traditional process, the new process can save about 44% of water, about 39% of electricity and time, about 23% of steam, and about 21% of cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a flow chart comparing the scouring and bleaching process provided in the embodiment of the present application with the conventional scouring and bleaching process of the comparative example;

[0028] Figure 2 It is a flow chart comparing the one-bath scouring, bleaching and whitening process of the present application provided in the examples of the present application and the traditional one-bath scouring, bleaching and whitening process of the comparative example. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0030] In the description of the present application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the feature. In the description of the present application, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0031] Additionally, references throughout this specification to "one embodiment"; "one embodiment," "one example," or similar language indicate that a particular feature, structure, or characteristic described in conjunction with the embodiment is included in at least one embodiment of the present application. Thus, appearances of the phrase "in one embodiment" and similar language throughout this specification may, but do not necessarily, all refer to the same embodiment.

[0032] The present application provides a set of scouring and bleaching processes for cellulose fiber textile products (i.e., textile products with a cellulose fiber content exceeding 10%) that reduce costs, increase efficiency, save energy, and reduce emissions, comprising the following steps:

[0033] S1. Injection: Treat the textile product in a scouring aqueous solution containing 1 to 2.5 g / L of scouring powder and 1 to 1.5 g / L of low-temperature low-alkali scouring agent at a mass ratio of 1:4 to 1:10 for 3 to 5 minutes; in some embodiments, when bleaching is required, the scouring aqueous solution further includes a whitening agent with a mass fraction of 0.25% to 0.4%;

[0034] The low-temperature and low-alkali scouring agent comprises, by mass fraction, 25% to 30% of polyethylene glycol, 15% to 30% of fatty alcohol polyoxyethylene ether, 5% to 10% of sodium lauryl ether sulfate, 5% to 10% of diethylene glycol butyl ether, 15% to 20% of copper porphyrin complex and the balance of water; in some embodiments, the average molecular weight of polyethylene glycol is 3400 to 4200; in other embodiments, the molecular formula of fatty alcohol polyoxyethylene ether is RO(CH2CH2O) n H, where R is C 12 -C 14 An alkyl group, wherein n is 15 or 16;

[0035] The refined powder comprises, by mass fraction, 15% to 25% of sodium metasilicate, 25% to 30% of sodium carbonate and 50% to 55% of sodium sulfate;

[0036] S2. oxidizing the textile product after the treatment in step S1, specifically comprising the following sub-steps:

[0037] S2-1: Treat the textile product with 3g / L to 4g / L H2O2 solution at 80℃ to 85℃ for 40min to 60min;

[0038] S2-2: Treat the textile product with 0.15 g / L to 0.3 g / L catalase solution at a temperature of 30°C to 50°C for 10 min to 15 min;

[0039] S3. When a whitening agent is added to the scouring aqueous solution in step S1, the textile product is softened; if no whitening agent is added, the textile product is dyed.

[0040] Example 1

[0041] The low-temperature low-alkali scouring agent used in this embodiment is composed of 25% polyethylene glycol with an average molecular weight of 3800, 15% C 12 Straight chain fatty alcohol polyoxyethylene ether (RO(CH2CH2O) nH wherein R is dodecyl, n=15), 10% of sodium dodecyl ether sulfate, 5% of diethylene glycol butyl ether, 15% of copper porphyrin complex and 30% of water.

[0042] The dyeing vat is filled with water and cellulose fiber fabric, with a fabric mass of 1000kg, a water intake of 6000L, a cloth speed of 200m / min, and a main pump speed of 1300rpm; then scouring powder (produced by Chuanhua Zhilian Co., Ltd., model TF-120CB) is added from the auxiliary vat at a ratio of 1g / L, and a low-temperature low-alkali scouring agent is added at a ratio of 1.5g / L, and the process is run for 3 minutes; then 50% hydrogen peroxide is added from the auxiliary vat at a ratio of 6g / L, and then the temperature is increased to 85°C at a heating rate of 3°C / min, and the process is run for 50 minutes, and then the temperature is reduced to 70°C at a rate of 3°C / min and the water is drained. After the water is drained, 4000L of water is added, and catalase is added from the auxiliary vat at a ratio of 0.2g / L, and the water is drained after running at 30°C for 10 minutes. At this time, the pH value is measured to be 7.24; the process is roughly the same as Figure 1 The low-temperature, low-alkali short-process scouring and bleaching process below is the same.

[0043] Example 2

[0044] The low-temperature low-alkali scouring agent used in this embodiment is composed of 30% polyethylene glycol with an average molecular weight of 3800, 15% C 12 The invention is composed of 5% of linear fatty alcohol polyoxyethylene ether, 5% of sodium lauryl ether sulfate, 5% of diethylene glycol butyl ether, 15% of copper porphyrin complex and 30% of water.

[0045] Water and cellulose fiber fabric are introduced into the dyeing main cylinder, with a fabric mass of 1000kg, a water intake of 6000L, a cloth speed of 200m / min, and a main pump speed of 1300rpm; then scouring powder (produced by Chuanhua Zhilian Co., Ltd., model TF-120CB) is added from the auxiliary cylinder at a ratio of 2.5g / L, and a low-temperature, low-alkali scouring agent is added at a ratio of 1.5g / L, and the process is run for 3 minutes; then 50% hydrogen peroxide is added from the auxiliary cylinder at a ratio of 6g / L, and then the temperature is increased to 80°C at a heating rate of 3°C / min, and the process is run for 50 minutes, and then the temperature is reduced to 70°C at a rate of 3°C / min and the dyeing is drained. After the drainage is completed, 4000L of water is introduced, and then catalase is added from the auxiliary cylinder at a ratio of 0.2g / L, and the dyeing is run at 30°C for 10 minutes and the water is drained. At this time, the pH value is measured to be 7.54.

[0046] Example 3

[0047] The low-temperature and low-alkali scouring agent used in this embodiment is composed of 30% polyethylene glycol with an average molecular weight of 3800, 25% C 12The invention is composed of linear fatty alcohol polyoxyethylene ether, 5% sodium lauryl ether sulfate, 10% diethylene glycol butyl ether, 20% copper porphyrin complex and 10% water.

[0048] Water and cellulose fiber fabric are introduced into the dyeing main cylinder, with a fabric mass of 1000kg, a water intake of 6000L, a cloth speed of 200m / min, and a main pump speed of 1300rpm; then scouring powder (produced by Chuanhua Zhilian Co., Ltd., model TF-120CB) is added from the auxiliary cylinder at a ratio of 1.0g / L, and a low-temperature, low-alkali scouring agent is added at a ratio of 1.0g / L, and the process is run for 3 minutes; then 50% hydrogen peroxide is added from the auxiliary cylinder at a ratio of 6g / L, and then the temperature is increased to 85°C at a heating rate of 3°C / min, and the process is run for 50 minutes, and then the temperature is reduced to 70°C at 3°C / min to drain the water, and after the drainage is completed, 4000L of water is introduced, and 0.2g / L of catalase is added from the auxiliary cylinder, and the water is drained after running at 50°C for 10 minutes. At this time, the pH value is measured to be 7.41.

[0049] Example 4

[0050] The low-temperature and low-alkali scouring agent used in this embodiment is composed of 30% polyethylene glycol with an average molecular weight of 3800 and 20% C 12 The invention is composed of linear fatty alcohol polyoxyethylene ether, 5% sodium lauryl ether sulfate, 10% diethylene glycol butyl ether, 15% copper porphyrin complex and 20% water.

[0051] Water and cellulose fiber fabric are introduced into the dyeing main cylinder, with a fabric mass of 1000kg, a water intake of 6000L, a cloth speed of 200m / min, and a main pump speed of 1300rpm; then scouring powder (produced by Chuanhua Zhilian Co., Ltd., model TF-120CB) is added from the auxiliary cylinder at a ratio of 2.5g / L, and a low-temperature, low-alkali scouring agent is added at a ratio of 1.5g / L, and the process is run for 3 minutes; then 50% hydrogen peroxide is added from the auxiliary cylinder at a ratio of 4g / L, and then the temperature is increased to 80°C at a heating rate of 3°C / min, and the process is run for 50 minutes, and then the temperature is reduced to 70°C at 3°C / min to drain the water. After the drainage is completed, 4000L of water is introduced, and 0.2g / l of catalase is added from the auxiliary cylinder, and the system is run at 50°C for 10 minutes to drain the water. At this time, the pH value is measured to be 7.96.

[0052] Example 5

[0053] The low-temperature low-alkali scouring agent used in this embodiment is composed of 25% polyethylene glycol with an average molecular weight of 3800, 15% C 12 The invention is composed of linear fatty alcohol polyoxyethylene ether, 10% sodium lauryl ether sulfate, 5% diethylene glycol butyl ether, 20% copper porphyrin complex and 25% water.

[0054] The dyeing vat is filled with water and cellulose fiber fabric, the fabric mass is 1000kg, the water intake is 6000L, the fabric speed is 200m / min, and the main pump speed is 1300rpm; then, scouring powder (produced by Chuanhua Zhilian Co., Ltd., model TF-120CB) is added from the auxiliary vat at a ratio of 2.5g / L, low-temperature low-alkali scouring agent is added at a ratio of 1.0g / L, and brightener CPD (produced by Chuanhua Zhilian Co., Ltd., whose ingredients include 4,4'-bis[(4-anilino-6-morpholino-1 ,3,5-triazine-2-yl)amino]stilbene-2,2'-disulfonic acid disodium salt 25-35wt%, sodium sulfate 65-75wt%), run for 3 minutes; then add 50% concentration of hydrogen peroxide from the auxiliary tank at a ratio of 6g / L, then heat to 85℃ at a heating rate of 3℃ / min, run for 50 minutes, then cool to 70℃ at 3℃ / min to drain, after drainage is completed and 4000L of water is added, add catalase from the auxiliary tank at a ratio of 0.2g / L, run at 30℃ for 10 minutes to drain, and the pH value is measured to be 7.7. Its process is roughly the same as Figure 2 The low-temperature, low-alkali short-process scouring and whitening one-bath process is the same as the one below.

[0055] Comparative Example 1

[0056] Water and cellulose fiber fabric are introduced into the dyeing main vat, with a fabric mass of 1000kg, a water intake of 6000L, a cloth speed of 200m / min, and a main pump speed of 1300rpm; then, a scouring agent (produced by Chuanhua Zhilian Co., Ltd., model TF-1291A) is added from the auxiliary vat at a ratio of 1.0g / L, a stabilizer (produced by Chuanhua Zhilian Co., Ltd., model TF-122BA) is added at a ratio of 0.5g / L, and a chelating agent (produced by Chuanhua Zhilian Co., Ltd., model TF-510) is added at a ratio of 0.5g / L, and the dyeing is run for 3 minutes. Add caustic soda flakes at a ratio of 2g / L and run for 3 minutes; then add 50% hydrogen peroxide from the auxiliary tank at a ratio of 2g / L, then heat to 98°C at a rate of 3°C / min, run for 40 minutes, then cool to 70°C at 3°C / min to drain, take in 4000L of water and wash for 10 minutes to drain, at which point the pH value is 11.1; then take in 4000L of water and add acetic acid from the auxiliary tank at a ratio of 1g / L, run for 10 minutes to drain, after the drainage is complete, take in 4000L of water and add catalase from the auxiliary tank at a ratio of 0.2g / L, run at 30°C for 10 minutes to drain. Its process is roughly the same as Figure 1 The traditional scouring and bleaching process is the same as above.

[0057] Comparative Example 2

[0058] Water and cellulose fiber fabric are introduced into the dyeing main cylinder, with a fabric mass of 1000kg, a water intake of 6000L, a cloth speed of 200m / min, and a main pump speed of 1300rpm; then scouring powder (produced by Chuanhua Zhilian Co., Ltd., model TF-120CB) is added from the auxiliary cylinder at a ratio of 1.0g / L, and a scouring agent (produced by Chuanhua Zhilian Co., Ltd., model TF-1291A) is added at a ratio of 1.0g / L, and the operation is continued for 3 minutes; then 50% concentration hydrogen peroxide is added from the auxiliary cylinder at a ratio of 6g / L, and then the temperature is increased to 85°C at a heating rate of 3°C / min, and the operation is continued for 50 minutes, and then the temperature is decreased to 70°C at a rate of 3°C / min to drain the water, and after the drainage is completed, 4000L of water is introduced, and then catalase is added from the auxiliary cylinder at a ratio of 0.2g / L, and the water is operated at 30°C for 10 minutes to drain the water. At this time, the pH value is measured to be 8.9.

[0059] Comparative Example 3

[0060] The low-temperature and low-alkali scouring agent used in this embodiment is composed of 30% polyethylene glycol with an average molecular weight of 3800, 25% C 12 The invention is composed of linear fatty alcohol polyoxyethylene ether, 5% sodium lauryl ether sulfate, 10% diethylene glycol butyl ether, 20% copper porphyrin complex and 10% water.

[0061] Water and cellulose fiber fabric are introduced into the dyeing main vat, with a fabric mass of 1000kg, a water intake of 6000L, a cloth speed of 200m / min, and a main pump speed of 1300rpm; then caustic soda flakes are added from the auxiliary vat at a ratio of 1.0g / L, and a low-temperature and low-alkali scouring agent is added at a ratio of 1.0g / L, and the process is run for 3 minutes; then 50% hydrogen peroxide is added from the auxiliary vat at a ratio of 6g / L, and then the temperature is increased to 85°C at a heating rate of 3°C / min, and the process is run for 50 minutes, and then the temperature is reduced to 70°C at a rate of 3°C / min and the dyeing main vat is drained. After the drainage is completed, 4000L of water is introduced, and then 0.2g / L of catalase is added from the auxiliary vat, and the dyeing main vat is run at 50°C for 10 minutes and the dyeing main vat is drained. At this time, the pH value is measured to be 9.7.

[0062] Comparative Example 4

[0063] Water and cellulose fiber fabric are introduced into the dyeing main vat, with a fabric mass of 1000 kg, a water intake of 6000 L, a fabric speed of 200 m / min, and a main pump speed of 1300 rpm; then, a scouring agent (produced by Chuanhua Zhilian Co., Ltd., model TF-1291A) is added from the auxiliary vat at a ratio of 1.0 g / L, a stabilizer TF-122BA produced by Chuanhua Zhilian Co., Ltd. is added at a ratio of 0.5 g / L, a chelating agent (produced by Chuanhua Zhilian Co., Ltd., model TF-510) is added at a ratio of 0.5 g / L, and a brightener CPD (produced by Chuanhua Zhilian Co., Ltd., whose components include 4,4'-bis[(4-anilino-6-morpholino-1,3,5-triazine-2-yl)] is added at a mass fraction of 0.25%. )amino] diphenylethylene-2,2'-disulfonic acid disodium salt 25-35wt%, sodium sulfate 65-75wt%), run for 3 minutes, add caustic soda flakes at a ratio of 2g / L from the auxiliary tank, run for 3 minutes, add 50% concentration of hydrogen peroxide at a ratio of 4g / L from the auxiliary tank, then heat to 98°C at a heating rate of 3°C / min, run for 40 minutes, then cool to 70°C at 3°C / min to drain, after drainage, then add 4000L of water and wash for 10 minutes to drain, at this time the measured pH value is 11.1; after adding 4000L of water, add acetic acid at a ratio of 1g / L from the auxiliary tank, run for 10 minutes to drain, after drainage, then add 4000L of water and add catalase at a ratio of 0.2g / L from the auxiliary tank, run at 30°C for 10 minutes to drain. Its process is roughly the same as Figure 2 The above traditional one-bath scouring and bleaching process is the same.

[0064] Verification Example 1 Fabric Performance

[0065] The whiteness of the embodiments and comparative examples was tested using an X-Rite Ci7600 colorimeter. The hair effect was tested for 1 minute using a 20 cm*5 cm cloth strip using a climbing height method. The results are shown in Table 1.

[0066] Table 1 Whiteness and capillary effect test results of the embodiments and comparative examples

[0067]

[0068] It can be seen from Table 1 that the whiteness of the embodiment and the comparative example is roughly the same, while the one-minute gross effect is slightly better than that of the comparative example, which indicates that the method of the present application can achieve the same or even better effect as the prior art.

[0069] In order to verify the influence of key components polyethylene glycol and fatty alcohol polyoxyethylene ether on the properties of low-temperature and low-alkali scouring agent, on the basis of Example 1, polyethylene glycol with an average molecular weight between 3400 and 4200 was used to replace the polyethylene glycol component of Example 1, or C with a mass fraction of 20% and a polymerization degree of 16 was used to replace the polyethylene glycol component of Example 1. 13The linear fatty alcohol polyoxyethylene ether of Example 1 is replaced by the linear fatty alcohol polyoxyethylene ether (while reducing the proportion of water accordingly), or the mass fraction of C 14 The linear fatty alcohol polyoxyethylene ether of Example 1 was replaced by the linear fatty alcohol polyoxyethylene ether (while reducing the proportion of water accordingly), and it was found that the whiteness and hair effect of the treated fabric were basically equivalent to those of Examples 1-4;

[0070] In addition, a composition-type scouring powder with a similar formula to TF-120CB (including 15% to 25% by mass of sodium metasilicate, 25% to 30% by mass of sodium carbonate and 50% to 55% by mass of sodium sulfate) was used to replace TF-120CB in Example 1. It was found that when the composition of the scouring powder was adjusted within the above range, the quality of the treated fabric obtained was roughly equivalent to that of Example 1.

[0071] Verification Example 2 Cost Comparison

[0072] Comparing Example 1 with Comparative Example 1, it can be seen from the process that the water used in Example 1 is 10000L, while that in Comparative Example 1 is 18000L, and the example saves 44% compared with the comparative example; the power of the machine used in Example 1 and Comparative Example 1 is 50kw. It can be seen from the experimental process that the example runs for 107 minutes and consumes 89kwh of electricity, while the comparative example runs for 175 minutes and consumes 146kwh of electricity, so the example saves 39% of electricity and time; 930kg of steam is required in the step refining of Example 1, while 1200kg of steam is used in Comparative Example 1, and the example saves 23% of steam; the cost of auxiliary agents consumed in Example 1 is 209.4 yuan, and the cost of auxiliary agents consumed in Comparative Example 1 is 228.0 yuan, and the example saves 8% of the auxiliary agent cost. The unit price of water is 10 yuan / ton, the unit price of steam is 250 yuan / ton, and the unit price of electricity is yuan / kwh. In the whole process, the cost calculation formula is water cost + steam cost + electricity cost + auxiliary agent cost = water consumption * water unit price + steam consumption * steam unit price + electricity consumption * electricity unit price + auxiliary agent cost. The corresponding parameters of the embodiment and the comparative example are filled into the formula, and it can be seen that the processing cost per kilogram of fabric in embodiment 1 is 0.6311 yuan, while that in comparative example 1 is 0.8358 yuan. Compared with comparative example 1, embodiment 1 saves 26% of the cost.

[0073] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A low-temperature, low-alkali scouring agent, characterized in that: Calculated by mass fraction, it includes 25% to 30% of polyethylene glycol, 15% to 30% of fatty alcohol polyoxyethylene ether, 5% to 10% of sodium lauryl ether sulfate, 5% to 10% of diethylene glycol butyl ether, 15% to 20% of copper porphyrin complex and the balance of water.

2. The low-temperature and low-alkali scouring agent according to claim 1, characterized in that: The average molecular weight of the polyethylene glycol is 3400-4200.

3. The low-temperature and low-alkali scouring agent according to claim 1, characterized in that: The molecular formula of the fatty alcohol polyoxyethylene ether is RO(CH2CH2O) n H, where R is C 12- C 14 The alkyl group of the present invention is alkyl, and n is 15 or 16.

4. A scouring aqueous solution for textile products, characterized in that: The invention comprises 1 g / L to 1.5 g / L of the low-temperature and low-alkali scouring agent as claimed in any one of claims 1 to 3.

5. The scouring aqueous solution according to claim 4, characterized in that It also includes refined powder of 1g / L to 2.5g / L.

6. The scouring aqueous solution according to claim 5, characterized in that The refined powder comprises 15% to 25% by mass of sodium metasilicate, 25% to 30% by mass of sodium carbonate and 50% to 55% by mass of sodium sulfate.

7. The scouring aqueous solution according to claim 4, characterized in that The content of cellulose fibers in the textile product exceeds 10%.

8. The scouring aqueous solution according to claim 4, characterized in that It also includes a whitening agent with a mass fraction of 0.25% to 0.4%.

9. A method for scouring and bleaching textile products using the scouring aqueous solution according to any one of claims 4 to 8, characterized in that: The following steps are involved: S1. treating the textile product in the scouring aqueous solution for 3 min to 5 min at a mass ratio of 1:4 to 1:10; S2. Oxidizing the textile product treated in step S1.

10. The scouring and bleaching method according to claim 9, characterized in that: The step S2 comprises the following sub-steps: S2-1: Treat the textile product with 3g / L to 4g / L H2O2 solution at 80℃ to 85℃ for 40min to 60min; S2-2: Treat the textile product with 0.15 g / L to 0.3 g / L catalase solution at a temperature of 30°C to 50°C for 10 min to 15 min.

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