Biological enzyme treatment method for soft skin-friendly wool fabric

Abstract

The invention relates to the technical field of wool fabrics, and particularly discloses a biological enzyme treatment method for a soft skin-friendly wool fabric. The biological enzyme treatment method for the soft skin-friendly wool fabric comprises the following steps: dispersing trypsin in water, stirring, adding carboxyl-terminated polyamidoamine, stirring in a constant-temperature water bath, adjusting the pH value of a system to 7.5-8, centrifuging and evaporating to obtain embedded trypsin; the preparation method comprises the following steps: dissolving sorbitol in absolute ethyl alcohol, adding stearic acid, stirring in a constant-temperature water bath, cooling and evaporating to obtain modified sorbitol; dispersing the embedded trypsin in water, adding the modified sorbitol, stirring in a constant-temperature water bath, cooling, and collecting filtrate to obtain activated bio-enzyme; dispersing the wool fabric in water, adding activated bio-enzyme and papain, stirring in a constant-temperature water bath, washing and air-drying. The wool fabric treated by the method is high in softness, good in skin friendliness and shrinkage resistance, simple in preparation method and suitable for large-scale popularization and application.

Description

Technical Field

[0001] The invention relates to the technical field of wool fabrics, in particular to a method for treating soft and skin-friendly wool fabrics with biological enzymes. Background Art

[0002] Wool fabrics have always been a favorite textile material due to their excellent warmth retention and natural texture. In modern textile technology, the application of bio-enzymes has brought new opportunities for the treatment of wool fabrics, among which the wool fabric bio-enzyme made from trypsin is a more common one. However, with the improvement of people's living standards, the performance expectations for wool fabrics are also getting higher and higher, especially in the three key aspects of "softness", "skin-friendliness" and "anti-shrinkage".

[0003] First of all, softness is an important reflection of the quality of wool fabrics. Although the traditional wool fabric biological enzyme treatment process can reduce the entanglement between wool fibers to a certain extent, making the fabric soft in the initial stage, this softening effect is often difficult to last. For example, some wool fabrics treated with traditional trypsin biological enzymes may become rough again after multiple washes, and the friction between fibers increases, resulting in a significant decrease in the softness of the fabric, and the hand feel becomes stiff, no longer having the initial soft and smooth feeling.

[0004] Secondly, skin-friendliness is also indispensable for wool fabrics. However, existing wool fabrics treated with biological enzymes often have defects in skin-friendliness. This is because wool fibers themselves have a certain irritation, and traditional biological enzyme treatment methods have failed to effectively reduce this irritation. Some treated wool fabrics may cause skin itching, allergies and other discomfort reactions when in contact with human skin, which seriously affects consumers' experience. In addition, some treatment methods may change the surface chemical properties of wool fibers, causing them to lose their original natural skin-friendly properties.

[0005] Finally, shrinkage resistance is also one of the key factors for wool fabrics to maintain good performance for a long time. During the washing process, wool fabrics treated with traditional trypsin enzymes easily absorb water and swell due to the scale structure of wool fibers and the hydrogen bonding inside the fibers, causing the fabric to shrink. This shrinkage phenomenon not only deforms the appearance of the fabric and deteriorates its dimensional stability, but also reduces its service life.

[0006] Patent CN1693575A proposes a wool anti-felting finishing method, which includes soaking wool fibers in chitosan aqueous solution for pre-treatment, and then enzymatically degrading wool fabrics with neutral protease and neutral fat to achieve the purpose of reducing the felting rate and improving the softness of wool fabrics. It has the advantages of short processing time, low cost, environmental protection and pollution-free. However, the chitosan bonding, enzyme degradation and other treatment processes mentioned in the patent will change the microstructure of wool fibers. This change will affect the original natural skin-friendly feeling of wool fabrics to a certain extent, greatly reducing their skin-friendly effect. Therefore, although the softness and shrinkage resistance of wool fabrics have been enhanced, the skin-friendly property has not been improved accordingly. .

[0007] Patent CN106350917A proposes a wool composite fabric with good skin-friendliness. The method improves the skin-friendliness of the wool fabric by adding polyacrylonitrile fiber, which has strong thermal insulation, flame retardancy and is non-irritating to the skin, and chlorofiber fiber, which has high elasticity and is convenient for making into underwear, into the fabric. However, the patent does not mention the improvement of the shrinkage resistance and softness of this wool composite fabric. Although polyacrylonitrile fiber and chlorofiber fiber are described as non-irritating to the skin, for some people with extremely sensitive skin, chemical fibers may still cause slight discomfort and affect the skin-friendliness of the wool fabric.

[0008] In summary, the prior art has problems in softness, skin affinity and shrinkage resistance to varying degrees. Therefore, developing a new biological enzyme treatment method for wool fabrics to fundamentally solve these problems has become a technical problem that needs to be solved urgently in this field. Summary of the invention

[0009] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a biological enzyme treatment method for soft and skin-friendly wool fabric.

[0010] A method for treating soft and skin-friendly wool fabric with biological enzymes, comprising the following steps: S1. Disperse 1-1.5 parts of trypsin by weight in water, stir, add 0.6-0.8 parts of carboxyl-terminated polyamidoamine, stir in a constant temperature water bath, adjust the pH value of the system to 7.5-8, centrifuge, evaporate, and obtain the embedded trypsin; S2, dissolving 1.2-1.5 parts of sorbitol in anhydrous ethanol, adding 0.8-1 parts of stearic acid, stirring in a constant temperature water bath, cooling, and evaporating to obtain modified sorbitol; S3, dispersing the embedded trypsin in 10-15 parts of water, adding modified sorbitol, stirring in a constant temperature water bath, cooling, collecting the filtrate, and obtaining an activated bio-enzyme; S4. Disperse 5-8 parts of wool fabric in water, add activated biological enzyme and 1-1.5 parts of papain, stir in a constant temperature water bath, rinse, and air dry.

[0011] Among them, the carboxyl group of stearic acid combines with the hydroxyl group in the sorbitol molecule, and the carbonyl group in the ester bond has a certain polarity.

[0012] On the one hand, it can form hydrogen bonds with the amino groups in the wool fibers, thereby enhancing the binding force between sorbitol and the wool fibers, and allowing sorbitol to form a uniform protective film on the surface of the wool fibers. This protective film effectively blocks the penetration of moisture by interacting with the hydrophobic areas on the surface of the wool fibers through the stearic acid chains in the modified sorbitol molecules, thereby further improving the shrinkage resistance of wool fabrics.

[0013] On the other hand, the hydroxyl groups in the sorbitol molecule can also bond with the amide groups in the wool fibers, making the protective film stronger and further improving the skin-friendliness. Moreover, this combination also helps maintain the softness of wool fabrics and reduces the harsh friction between fibers.

[0014] Preferably, in step S1, trypsin is dispersed in water and stirred for 10-20 min at a stirring speed of 100-200 r / min.

[0015] Preferably, in step S1, the carboxyl-terminated polyamidoamine is added at a rate of 10-15% per minute based on the total weight of the carboxyl-terminated polyamidoamine.

[0016] Preferably, in step S1, the generation number of the carboxyl-terminated polyamidoamine is 1.5.

[0017] Preferably, in step S1, a sodium carbonate solution with a concentration of 0.2-0.5 mol / L is used to adjust the pH value of the system to 7.5-8.

[0018] Preferably, in step S2, stirring is performed in a constant temperature water bath, the temperature of the constant temperature water bath is 80-90° C., the stirring time is 3-4 h, and the stirring speed is 100-200 r / min.

[0019] Preferably, in step S3, modified sorbitol is added at a rate of 8-10% per minute based on the total weight of the modified sorbitol.

[0020] Preferably, in step S4, stirring is performed in a constant temperature water bath, the temperature of the constant temperature water bath is 35-40° C., the stirring time is 1-1.5 h, and the stirring speed is 100-200 r / min.

[0021] A soft and skin-friendly wool fabric is made by adopting the soft and skin-friendly wool fabric biological enzyme treatment method.

[0022] Beneficial effects: In the present invention, the carboxyl-terminated polyamidoamine has a typical dendritic or hyperbranched structure, and a large number of carboxyl-terminated functional groups thereof extend outward. The carboxyl groups of the carboxyl-terminated polyamidoamine combine with the amino groups in the trypsin molecule, so that the two are closely connected, and the trypsin is stably encapsulated in the internal space constructed by the carboxyl-terminated polyamidoamine, effectively avoiding the interference of factors such as ions and pH value changes in the external solution on its activity, and the treatment effect on wool fibers can be stable.

[0023] The embedded trypsin of the present invention stably combines with amino groups and hydroxyl groups in wool fibers, which can effectively change the microstructure of wool fibers, reduce friction and entanglement between fibers, and make the wool fabric significantly soft. At the same time, the embedded trypsin can also improve the skin affinity of wool fibers because it can significantly optimize the microstructure of the fiber surface, making it more suitable for human skin. In addition, the embedded trypsin can also form a hydration layer on the surface of the wool fibers, effectively hindering the rapid evaporation and loss of water, and improving the shrinkage resistance of wool fabrics.

[0024] Through experiments, it was found that the present invention encapsulates trypsin and then acts synergistically with papain, which not only has a good enzymatic stabilization effect, but also can significantly enhance the protein hydrolysis ability on the surface of wool fibers, optimize the microstructure of wool fibers, further reduce the friction between fibers, and significantly improve skin affinity and softness. At the same time, the embedded trypsin is bonded with modified sorbitol, which enhances the stability and effect of the biological enzyme in the wool fiber processing process.

[0025] The invention successfully prepares wool fabric with high softness, good skin affinity and strong shrinkage resistance through the synergistic effect of multiple components, and provides a scientific, reasonable and innovative method for high-performance processing of wool fabric. In addition, the preparation method is simple, low-cost and suitable for large-scale promotion and production. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a comparison chart of static friction coefficient tests of wool fabrics treated with Example 5 and Comparative Examples 1-2.

[0027] Figure 2 This is a comparison chart of the dynamic friction coefficient test of the wool fabrics treated with Example 5 and Comparative Examples 1-2.

[0028] Figure 3 This is a comparison chart of the bending stiffness test of the wool fabrics treated with Example 5 and Comparative Examples 1-2.

[0029] Figure 4 This is a comparison chart of compression modulus test of wool fabrics treated with Example 5 and Comparative Examples 1-2.

[0030] Figure 5This is a comparison chart of the felt shrinkage test of the wool fabrics treated with Example 5 and Comparative Examples 1-2. DETAILED DESCRIPTION

[0031] The present invention will be further explained below in conjunction with specific embodiments.

[0032] A method for treating soft and skin-friendly wool fabric with biological enzymes, comprising the following steps: S1. Disperse 10g of trypsin in 100g of water, stir for 10min at a stirring speed of 100r / min, add 6g of 1.5-generation carboxyl-terminated polyamidoamine, based on the total weight of the carboxyl-terminated polyamidoamine, and add the carboxyl-terminated polyamidoamine at a rate of 10% per minute. Stir in a 30°C constant temperature water bath for 0.5h at a stirring speed of 200r / min, adjust the pH value of the system to 7.5 with a sodium carbonate solution with a concentration of 0.2mol / L, centrifuge, and evaporate to obtain embedded trypsin; S2, dissolving 12g of sorbitol in 60g of anhydrous ethanol, adding 8g of stearic acid, stirring in a constant temperature water bath at 80°C for 3h at a stirring speed of 100r / min, cooling, and evaporating to obtain modified sorbitol; S3, dispersing the embedded trypsin in 100g water, adding modified sorbitol, based on the total weight of the modified sorbitol, the modified sorbitol is added at a rate of 8% per minute, stirring in a constant temperature water bath at 40°C for 2h, the stirring time is 100r / min, cooling, collecting the filtrate, and adding to obtain activated bio-enzyme; S4. Disperse 50g wool fabric in 150g water, add activated bio-enzyme and 10g papain, stir at 35℃ for 1h, stirring speed is 100r / min, rinse and air dry.

[0033] A method for treating soft and skin-friendly wool fabric with biological enzymes, comprising the following steps: S1. Disperse 15g of trypsin in 120g of water, stir for 20min at a stirring speed of 200r / min, add 8g of 1.5-generation carboxyl-terminated polyamidoamine, based on the total weight of the carboxyl-terminated polyamidoamine, and add the carboxyl-terminated polyamidoamine at a rate of 15% per minute. Stir in a 35°C constant temperature water bath for 1h at a stirring speed of 300r / min, adjust the pH value of the system to 8 with a sodium carbonate solution with a concentration of 0.5mol / L, centrifuge, and evaporate to obtain embedded trypsin; S2, dissolving 15g of sorbitol in 80g of anhydrous ethanol, adding 10g of stearic acid, stirring in a constant temperature water bath at 90°C for 4h at a stirring speed of 200r / min, cooling, and evaporating to obtain modified sorbitol; S3, dispersing the embedded trypsin in 150g of water, adding modified sorbitol, based on the total weight of the modified sorbitol, adding the modified sorbitol at a rate of 10% per minute, stirring in a constant temperature water bath at 50°C for 3h, stirring time of 200r / min, cooling, collecting the filtrate, and obtaining an activated bio-enzyme; S4. Disperse 80g wool fabric in 200g water, add activated bio-enzyme and 15g papain, stir at a constant temperature of 40°C for 1.5h, stirring speed of 200r / min, rinse, and air-dry.

[0034] A method for treating soft and skin-friendly wool fabric with biological enzymes, comprising the following steps: S1. Disperse 11g of trypsin in 105g of water, stir for 12min at a stirring speed of 120r / min, add 6.5g of 1.5-generation carboxyl-terminated polyamidoamine, based on the total weight of the carboxyl-terminated polyamidoamine, and add the carboxyl-terminated polyamidoamine at a rate of 11% per minute, stir in a 31°C constant temperature water bath for 0.6h at a stirring speed of 220r / min, adjust the pH value of the system to 7.6 with a sodium carbonate solution with a concentration of 0.3mol / L, centrifuge, and evaporate to obtain embedded trypsin; S2, dissolving 13g of sorbitol in 65g of anhydrous ethanol, adding 8.5g of stearic acid, stirring in a constant temperature water bath at 82°C for 3.2h at a stirring speed of 120r / min, cooling, and evaporating to obtain modified sorbitol; S3, dispersing the embedded trypsin in 110g of water, adding modified sorbitol, based on the total weight of the modified sorbitol, the modified sorbitol is added at a rate of 8.5% per minute, stirring in a constant temperature water bath at 42°C for 2.2h, the stirring time is 120r / min, cooling, collecting the filtrate, and obtaining an activated bio-enzyme; S4. Disperse 60g wool fabric in 160g water, add activated bio-enzyme and 11g papain, stir at a constant temperature of 36°C for 1.1h, stirring speed of 120r / min, rinse, and air-dry.

[0035] A method for treating soft and skin-friendly wool fabric with biological enzymes, comprising the following steps: S1. Disperse 14g of trypsin in 115g of water, stir for 18min at a stirring speed of 180r / min, add 7.5g of 1.5-generation carboxyl-terminated polyamidoamine, based on the total weight of the carboxyl-terminated polyamidoamine, and add the carboxyl-terminated polyamidoamine at a rate of 14% per minute, stir in a 34°C constant temperature water bath for 0.9h at a stirring speed of 280r / min, adjust the pH value of the system to 7.9 with a sodium carbonate solution having a concentration of 0.4mol / L, centrifuge, and evaporate to obtain embedded trypsin; S2, dissolving 14 g of sorbitol in 75 g of anhydrous ethanol, adding 9.5 g of stearic acid, stirring in a constant temperature water bath at 88° C. for 3.8 h at a stirring speed of 180 r / min, cooling, and evaporating to obtain modified sorbitol; S3, dispersing the embedded trypsin in 140g of water, adding modified sorbitol, based on the total weight of the modified sorbitol, the modified sorbitol is added at a rate of 9.5% per minute, stirring in a constant temperature water bath at 48°C for 2.8h, the stirring time is 180r / min, cooling, collecting the filtrate, and obtaining an activated bio-enzyme; S4. Disperse 70g wool fabric in 190g water, add activated bio-enzyme and 14g papain, stir at a constant temperature of 39°C for 1.4h, stirring speed of 180r / min, rinse, and air-dry.

[0036] A method for treating soft and skin-friendly wool fabric with biological enzymes, comprising the following steps: S1. Disperse 12g of trypsin in 110g of water, stir for 15min at a stirring speed of 150r / min, add 7g of 1.5-generation carboxyl-terminated polyamidoamine, based on the total weight of the carboxyl-terminated polyamidoamine, and add the carboxyl-terminated polyamidoamine at a rate of 12% per minute. Stir in a 32°C constant temperature water bath for 0.7h at a stirring speed of 250r / min, adjust the pH value of the system to 7.7 with a sodium carbonate solution having a concentration of 0.35mol / L, centrifuge, and evaporate to obtain embedded trypsin; S2, dissolving 13.5 g of sorbitol in 70 g of anhydrous ethanol, adding 9 g of stearic acid, stirring in a constant temperature water bath at 85° C. for 3.5 h at a stirring speed of 150 r / min, cooling, and evaporating to obtain modified sorbitol; S3, dispersing the embedded trypsin in 120g of water, adding modified sorbitol, based on the total weight of the modified sorbitol, the modified sorbitol is added at a rate of 9% per minute, stirring in a constant temperature water bath at 45°C for 2.5h, the stirring time is 150r / min, cooling, collecting the filtrate, and obtaining an activated bio-enzyme; S4. Disperse 75g wool fabric in 170g water, add activated bio-enzyme and 12g papain, stir at 37°C for 1.2h, stirring speed of 150r / min, rinse, and air-dry.

[0037] Comparative Example 1 A method for treating soft and skin-friendly wool fabric with biological enzymes, comprising the following steps: S1. Dissolve 13.5 g of sorbitol in 70 g of anhydrous ethanol, add 9 g of stearic acid, stir in a constant temperature water bath at 85° C. for 3.5 h at a stirring speed of 150 r / min, cool, and evaporate to obtain modified sorbitol; S2, dispersing 12g of trypsin in 120g of water, adding modified sorbitol, based on the total weight of the modified sorbitol, the modified sorbitol addition rate is 9% per minute, stirring in a constant temperature water bath at 45°C for 2.5h, the stirring time is 150r / min, cooling, collecting the filtrate, and obtaining an activated bio-enzyme; S3. Disperse 75g wool fabric in 170g water, add activated bio-enzyme, 12g papain, 7g 1.5-generation carboxyl-terminated polyamidoamine, stir at 37°C for 1.2h at a stirring speed of 150r / min, rinse, and air-dry.

[0038] Comparative Example 2 A method for treating soft and skin-friendly wool fabric with biological enzymes, comprising the following steps: S1. Disperse 12g of trypsin in 110g of water, stir for 15min at a stirring speed of 150r / min, add 7g of 1.5-generation carboxyl-terminated polyamidoamine, based on the total weight of the carboxyl-terminated polyamidoamine, and add the carboxyl-terminated polyamidoamine at a rate of 12% per minute. Stir in a 32°C constant temperature water bath for 0.7h at a stirring speed of 250r / min, adjust the pH value of the system to 7.7 with a sodium carbonate solution having a concentration of 0.35mol / L, centrifuge, and evaporate to obtain embedded trypsin; S2, dispersing the embedded trypsin in 120g water, adding 13.5g sorbitol and 9g stearic acid, stirring in a constant temperature water bath at 45°C for 2.5h, the stirring time is 150r / min, cooling, collecting the filtrate, and obtaining an activated bio-enzyme; S3. Disperse 75g wool fabric in 170g water, add activated bio-enzyme and 12g papain, stir at 37°C for 1.2h at a stirring speed of 150r / min, rinse, and air-dry.

[0039] Test Example 1 The wool fabrics treated in Example 5 and Comparative Examples 1-2 were subjected to friction coefficient tests, as follows: Referring to the FZ / T 01054-2012 standard, the wool fabrics prepared in Example 5 and Comparative Examples 1-2 after biological enzyme treatment were cut into samples of 200 mm × 200 mm; the sample surface was ensured to be clean and flat without obvious wrinkles or stains; the sample was fixed on the XCF-1A fiber friction coefficient tester, and the friction roller descending speed was set to 50 mm / min. After the test is completed, the instrument will automatically calculate the static friction coefficient and the dynamic friction coefficient, and record the data. Repeat the above steps for 3 times, recorded as Group 1, Group 2, and Group 3.

[0040] Depend on Figure 1 , Figure 2It can be seen that the static friction coefficient and dynamic friction coefficient of the wool fabrics treated with Example 5 and Comparative Examples 1-2 are ranked as Example 5>Comparative Example 2>Comparative Example 1, that is, the wool fabric treated with Example 5 exhibits the best skin affinity, which is because the embedded trypsin acts on the wool fiber to significantly optimize the microstructure of the fiber surface, making it more suitable for human skin, and the embedded trypsin and papain act synergistically, further improving its skin affinity. In addition, the hydroxyl group in the sorbitol molecule can also bond with the amide group in the wool fiber, making the protective film more firm and the skin affinity further improved, so the skin affinity of Example 5 is the best.

[0041] Test Example 2 The wool fabrics treated in Example 5 and Comparative Examples 1-2 were subjected to bending stiffness tests, as follows: Referring to GB / T18318.1-2009 standard, the wool fabrics treated with biological enzymes prepared in Example 5 and Comparative Examples 1-2 were cut into 250mm×25mm specimens to ensure that the specimens were free of wrinkles or stains; the specimens were placed on the horizontal platform of the YuanMore manual fabric stiffness tester, with the long axis of the specimen parallel to the long axis of the platform. The specimen was pushed so that one end gradually separated from the platform support and hung in the air. Under the action of gravity, one end of the specimen bent downward. When the head end of the specimen passed through the front edge of the platform and reached an inclined plane with an inclination angle of 41.5° to the horizontal line, the extended length was recorded. Repeat the above steps for 3 times, recorded as Group 1, Group 2, and Group 3.

[0042] Use the following formula to calculate: Bending stiffness , Among them, the acceleration due to gravity is 9.81m / s², Bending length .

[0043] Test Example 3 The wool fabrics treated in Example 5 and Comparative Examples 1-2 were subjected to compression modulus tests, as follows: Referring to GB / T 1041-2008 standard, the wool fabrics treated with biological enzymes prepared in Example 5 and Comparative Examples 1-2 were cut into 25 mm × 25 mm samples; the samples were placed between the surfaces of the two pressing plates, and the center line of the sample coincided with the center line connecting the two pressing plate surfaces, ensuring that the end face of the sample was parallel to the pressing plate surface. A compression elastic modulus tester (HY-0580, produced by Shanghai Hengyi Precision Instrument Co., Ltd.) was used to make the pressing plate surface just contact the end face of the sample, and this time was set as the zero point for measuring deformation, and the speed was adjusted to 1 mm / min. After the test is completed, the instrument will automatically calculate the compression modulus and record the data. Repeat the above steps for 3 times, recorded as Group 1, Group 2, and Group 3.

[0044] Depend on Figure 3 , Figure 4 It can be seen that the rankings of the bending stiffness and compression modulus of the wool fabrics treated with Example 5 and Comparative Examples 1-2 are both Example 5> Comparative Example 2> Comparative Example 1, that is, the wool fabric treated with Example 5 shows the best softness. This is because the embedded trypsin is stably combined with the amino and hydroxyl groups in the wool fiber, which can effectively change the microstructure of the wool fiber and increase the softness of the wool fabric. In addition, the embedded trypsin and papain work synergistically to further improve its softness. In addition, the hydroxyl group in the sorbitol molecule can also bond with the amide group in the wool fiber, making the protective film more firm and the softness further improved, so the softness performance of Example 5 is the best.

[0045] Test Example 4 The wool fabrics treated in Example 5 and Comparative Examples 1-2 were subjected to a felt shrinkage test, as follows: Referring to GB / T 4288-2018 standard, the wool fabrics treated with biological enzymes prepared in Example 5 and Comparative Examples 1-2 were cut into samples of 500 mm x 500 mm, and the washing machine was started for washing. The washing program suitable for wool was selected, the temperature was set to 40°C, the samples were laid flat to dry, the size was measured, and the data was recorded. The above steps were repeated for 3 times, recorded as Group 1, Group 2, and Group 3.

[0046] Use the following formula to calculate: Felt shrinkage (%) 100.

[0047] Depend on Figure 5 It can be seen that the ranking of the felt shrinkage rates of the wool fabrics treated in Example 5 and Comparative Examples 1-2 is Example 5> Comparative Example 1> Comparative Example 2, that is, the wool fabric treated in Example 5 exhibits the best anti-shrinkage performance, because the embedded trypsin can form a hydration layer on the surface of the wool fiber, effectively preventing the rapid evaporation and loss of water, and improving the anti-shrinkage ability of the wool fabric. In addition, the carboxyl group of stearic acid combines with the hydroxyl group in the sorbitol molecule, so that sorbitol forms a uniform protective film on the surface of the wool fiber. This protective film interacts with the hydrophobic area on the surface of the wool fiber through the stearic acid chain in the sorbitol molecule, effectively preventing the penetration of water, so the anti-shrinkage performance of Example 5 is the best.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for treating soft and skin-friendly wool fabric with biological enzymes, characterized in that: The steps include: S1. Disperse 1-1.5 parts of trypsin by weight in water, stir, add 0.6-0.8 parts of carboxyl-terminated polyamidoamine, stir in a constant temperature water bath, adjust the pH value of the system to 7.5-8, centrifuge, evaporate, and obtain the embedded trypsin; S2, dissolving 1.2-1.5 parts of sorbitol in anhydrous ethanol, adding 0.8-1 parts of stearic acid, stirring in a constant temperature water bath, cooling, and evaporating to obtain modified sorbitol; S3, dispersing the embedded trypsin in 10-15 parts of water, adding modified sorbitol, stirring in a constant temperature water bath, cooling, collecting the filtrate, and obtaining an activated bio-enzyme; S4. Disperse 5-8 parts of wool fabric in water, add activated biological enzyme and 1-1.5 parts of papain, stir in a constant temperature water bath, rinse, and air dry.

2. The method for treating soft and skin-friendly wool fabric with biological enzymes according to claim 1, characterized in that: In step S1, trypsin is dispersed in water and stirred. The stirring time is 10-20 minutes and the stirring speed is 100-200 r / min.

3. The method for treating soft and skin-friendly wool fabric with biological enzymes according to claim 1, characterized in that: In step S1, carboxyl-terminated polyamidoamine is added, and the carboxyl-terminated polyamidoamine is added at a speed of 10-15% per minute based on the total weight of the carboxyl-terminated polyamidoamine.

4. The method for treating soft and skin-friendly wool fabric with biological enzymes according to claim 1, characterized in that: In step S1, the generation number of the carboxyl-terminated polyamidoamine is 1.

5.

5. The method for treating soft and skin-friendly wool fabric with biological enzymes according to claim 1, characterized in that: In step S1, a sodium carbonate solution with a concentration of 0.2-0.5 mol / L is used to adjust the pH value of the system to 7.5-8.

6. The method for treating soft and skin-friendly wool fabric with biological enzymes according to claim 1, characterized in that: In step S2, stirring is performed in a constant temperature water bath, the constant temperature water bath temperature is 80-90° C., the stirring time is 3-4 h, and the stirring speed is 100-200 r / min.

7. The method for treating soft and skin-friendly wool fabric with biological enzymes according to claim 1, characterized in that: In step S3, modified sorbitol is added, and the adding speed of the modified sorbitol is 8-10% per minute based on the total weight of the modified sorbitol.

8. The method for treating soft and skin-friendly wool fabric with biological enzymes according to claim 1, characterized in that: In step S4, stirring is performed in a constant temperature water bath, the temperature of the constant temperature water bath is 35-40° C., the stirring time is 1-1.5 h, and the stirring speed is 100-200 r / min.

9. A soft, skin-friendly wool fabric, characterized in that: The soft and skin-friendly wool fabric is made by the biological enzyme treatment method according to any one of claims 1 to 8.

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