A method for shrinkage-proof and pilling-resistant wool fabric by mercerizing with limonene-complex enzyme

Abstract

The present invention discloses a method for mercerizing and anti-shrinking and anti-pilling of wool fabrics using a limonene-complex enzyme, and belongs to the field of applied technology for wool fabric dyeing and finishing in the wool spinning industry. The present invention first prepares a wool fabric mercerizing and anti-shrinking and anti-pilling finishing liquid, wherein the finishing liquid comprises liquid A and liquid B; liquid A contains limonene, a penetrant, a smoothing agent, and water; liquid B contains the protease Savinase Ultra 16XL, sodium bicarbonate, sophorolipids, sodium alginate, and water; then, the limonene in liquid A is used to catalyze and hydrolyze the hydrophobic lipid layer on the wool surface at high temperature, so that the wool has a certain hydrophilicity, thereby improving the utilization rate of subsequent enzymes; and then, the wool is treated with the complex enzyme in liquid B, so that the felting rate of the prepared wool fabric reaches the national standard (<6%), the strength loss is low (<5%), and good anti-pilling performance (grade 4.5-5) is obtained.

Description

Technical Field

[0001] The invention relates to a limonene-complex enzyme mercerizing, shrinkage-proofing and pilling-proofing method for wool fabric, and belongs to the technical field of application of wool fabric dyeing and finishing in the wool spinning industry. Background Art

[0002] As a high-end textile fiber, wool offers excellent warmth retention, drape, a voluptuous and elastic feel, and high moisture absorption. Wool fibers are composed of an outer scale layer, a cortex layer, an inner medulla layer, and a cell membrane complex. The scale layer contains keratinized, oval cells, with the free ends of the scales facing the tips of the hairs, layered like fish scales that cover the fiber surface. The scale layer of wool is highly complex, accounting for approximately 10% of the total wool mass. Due to the complex structure of the scale layer, wool often experiences felting. Directional friction, wool's excellent stretch recovery properties, and its naturally stable curl are key factors contributing to wool felting. Furthermore, the presence of scales can affect the wool's sheen.

[0003] To achieve machine washability, various anti-felting finishing technologies for wool have been developed. These include the "subtractive" method, which destroys the scale layer to achieve shrinkage resistance, the "additive" method, which deposits polymers such as resins on the fiber surface to achieve shrinkage resistance, and a combination of the two. Currently, the chlorination-resin method is the most mature and widely used. However, wool produced with this method tends to yellow and loses elasticity, affecting its quality and wearability. Furthermore, it produces organic chlorine pollution in wastewater that is difficult to degrade and poses a health hazard. For these reasons, non-chlorine anti-felting processes have begun to be researched, developed, and applied, such as the oxidation-resin method, the single resin method, the bio-enzyme method, and the plasma anti-felting method.

[0004] In recent years, proteases have become an alternative to traditional functional finishing methods for wool textiles due to their high efficiency, mild application conditions, and environmental friendliness. Currently, proteases used for anti-felting are primarily serine proteases extracted from animals or microorganisms. Their mechanism of action in the anti-felting process is to hydrolyze globular proteins within the cell membrane complex, separating the wool scale cells and cortical cells from the main fiber, creating a peeling effect. This is an inside-out process. This weight reduction treatment severely damages the cell membrane complex, the only continuous tissue within the wool fiber, resulting in significant damage. Therefore, to achieve machine-washable anti-felting standards, enzymatic treatment must be combined with chemical pretreatment. Common chemical pretreatment reagents include potassium permanganate, hydrogen peroxide, and sodium sulfoxylate. These chemical pretreatments remove homocysteine ​​from the outer layer of the wool scales, weakening the wool fiber's hydrophobicity and facilitating the entry of enzyme molecules. Treating wool fabrics in this manner poses environmental risks, including chemical contamination.

[0005] Currently, a combination of alkali and the cationic detergent CTAB is reportedly the most effective treatment for removing wool lipids. However, CTAB treatment requires acidification, which is cumbersome and difficult to remove, affecting subsequent enzyme treatments. Cationic detergents can also cause environmental pollution. Summary of the Invention

[0006] [Technical Issues]

[0007] When using a single protease to perform enzymatic mercerization and shrinkage-proof finishing on wool fabrics, there are problems such as low protease utilization and large internal loss of wool after finishing.

[0008] The use of chemical reagent pretreatment combined with enzyme treatment may lead to problems such as chemical reagent pollution of the environment;

[0009] The CTAB treatment step is complicated.

[0010] [Technical solution]

[0011] In order to solve the above problems, the present invention provides a method for the shrinkage and pilling prevention of wool fabrics by mercerizing with limonene-complex enzymes. Specifically, limonene is first used to catalyze the hydrolysis of the hydrophobic lipid layer on the surface of the wool at high temperature, so that the wool has a certain hydrophilicity, thereby improving the utilization rate of subsequent enzymes; then the wool is treated with a complex enzyme, so that the wool obtains an ideal anti-felting effect while maintaining the strength loss at a low level.

[0012] The first object of the present invention is to provide a mercerizing, shrinkage-proof and anti-pilling finishing liquid for wool fabrics, the finishing liquid comprising liquid A and liquid B; liquid A contains limonene, a penetrant, a smoothing agent and water, wherein the concentration of the penetrant is 0.5-2 g / L, the concentration of the smoothing agent is 0.5-1.5 g / L, and the concentration of the limonene is 1-20% owf; liquid B contains protease Savinase Ultra 16XL, sodium bicarbonate, sophorolipid, sodium alginate and water, wherein the concentration of the protease Savinase Ultra 16XL is 1-10% owf, the concentration of the sodium bicarbonate is 0.5-2% owf, the concentration of the sophorolipid is 0.5-2 g / L, and the concentration of the sodium alginate is 1-10 g / L.

[0013] In one embodiment of the present invention, the penetrant in liquid A is JFC-6, and the smoothing agent is MIRALAN HTW.

[0014] In one embodiment of the present invention, the smoothing agent is MIRALAN HTW, which is available from Huntsman.

[0015] In one embodiment of the present invention, the protease Savinase Ultra 16XL was purchased from Novozymes, with a nominal enzyme activity of 16KNPU-S / g and an actual enzyme activity of 4640 U / g.

[0016] The second object of the present invention is to provide a method for preparing a mercerized, shrink-proof and anti-pilling finishing liquid for wool fabrics, wherein the method comprises uniformly mixing the components of liquid A and liquid B respectively.

[0017] A third object of the present invention is to provide a method for treating wool fabrics based on a mercerizing anti-shrinkage and anti-pilling finishing solution, comprising the following steps:

[0018] (1) Limonene pretreatment:

[0019] The wool fabric is immersed in hot water and then taken out; then placed in solution A and treated at 85-98°C for 10-120 minutes; after the treatment, it is thoroughly washed with water and dried to obtain the limonene-pretreated wool fabric;

[0020] (2) Complex enzyme treatment:

[0021] The wool fabric pretreated with limonene is placed in liquid B and treated at pH 8-9 and 40-60° C. for 10-120 minutes. After the treatment, the enzyme is inactivated, the fabric is washed with water, and dried to obtain the shrinkage-resistant and pilling-resistant wool fabric.

[0022] In one embodiment of the present invention, the wool fabric in step (1) comprises any one of pure wool gabardine, serge, and varnish worsted fabric.

[0023] In one embodiment of the present invention, the hot water soaking in step (1) is soaking in hot water at 70-90° C. for 20-40 minutes.

[0024] In one embodiment of the present invention, the pretreatment in step (1) is performed at 98° C. for 10-60 min.

[0025] In one embodiment of the present invention, the bath ratio of the pretreatment in step (1) is 1:20-1:50.

[0026] In one embodiment of the present invention, the drying in step (1) is performed at 40-60° C. for 0.5-4 h.

[0027] In one embodiment of the present invention, the complex enzyme treatment in step (2) is carried out at 50° C. for 30-120 min.

[0028] In one embodiment of the present invention, the bath ratio of the complex enzyme in step (2) is 1:20-1:50.

[0029] In one embodiment of the present invention, in step (2), the enzyme is inactivated by raising the temperature of the complex enzyme treatment solution to 80-90° C. for 10-20 minutes.

[0030] In one embodiment of the present invention, the drying in step (2) is performed at 40-60° C. for 0.5-4 h.

[0031] The fourth object of the present invention is the shrinkage-resistant and pilling-resistant wool fabric prepared by the method of the present invention.

[0032] The fifth object of the present invention is the application of the wool fabric mercerizing, shrinkage-proofing and anti-pilling finishing liquid of the present invention in the field of wool fabrics.

[0033] In one embodiment of the present invention, the application is used for pre-treatment of wool dyeing, so that the crystallinity is reduced and the dye is easier to dye.

[0034] [Beneficial Effects]

[0035] (1) The present invention is the first to use limonene as a method for pretreating wool fabrics. It can catalyze the hydrolysis of the hydrophobic lipid layer on the wool surface at high temperature, thereby increasing the hydrophilicity of the wool surface and allowing subsequent proteases to concentrate their action on the wool scales rather than the CMC layer, thereby improving the effect of subsequent wool enzyme treatment.

[0036] (2) Compared with the shrinkage prevention method using a single protease, the present invention has the advantage that the utilization rate of the protease is significantly improved. After only 30 minutes of treatment with the composite enzyme, the felt shrinkage rate of the wool fabric can reach the national standard (<6%), the strength loss is low (<5%), and better anti-pilling performance (grade 4.5-5) is obtained.

[0037] (3) The present invention is an environmentally friendly mercerizing anti-felting and anti-pilling finishing method, which solves the problems of large enzyme dosage and large strength loss in the anti-shrinkage process of a single protease, and is more in line with the requirements of modern green ecology, health and environmental protection than the traditional chlorination method. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a scanning electron microscope image of the wool fabric treated in Example 1.

[0039] Figure 2 This is a scanning electron microscope image of the wool fabric after treatment in Comparative Example 4. DETAILED DESCRIPTION

[0040] The following describes preferred embodiments of the present invention. It should be understood that the embodiments are for better explanation of the present invention and are not intended to limit the present invention.

[0041] Test method:

[0042] 1. Felt shrinkage test method:

[0043] The dimensional stability of fabrics after washing was determined with reference to GB 8628-2001 “Textiles — Preparation, marking and measurement of fabric specimens and garments for testing dimensional changes” and GB 8629-2001 “Textiles — Household washing and drying procedure”.

[0044] The specific calculation formula is as follows:

[0045] Felt shrinkage (%) = (area before washing - area after washing) / area before washing × 100%.

[0046] 2. Breaking strength test method:

[0047] Measure the breaking strength of wool fabrics according to GB / T 3923.1-2013, "Tensile Properties of Textiles — Part 1: Determination of Breaking Force and Elongation (Strip Method)." Calculate the strength loss by averaging the data from three measurements in the same direction (weft or warp) for each sample.

[0048] The specific calculation formula is as follows:

[0049] Strength loss rate (%) = (breaking strength of untreated wool - breaking strength of treated wool) / breaking strength of untreated wool × 100%.

[0050] 3. Anti-pilling test method:

[0051] With reference to GB / T 4802.2 2008 “Determination of Fabric Propensity to Fuzzing and Pilling”, the samples were subjected to pilling treatment using a YG401C fabric flat abrader (Martindale apparatus) and tested 50 times.

[0052] The ratings are based on the tested standard samples, as shown in Table 1.

[0053] Table 1 Fabric anti-pilling performance evaluation table

[0054] series Status Description 5 No change 4 Slightly fuzzy or slightly pilling on the surface 3 The surface is moderately fuzzy (or) pilling, with balls of different sizes and densities covering part of the surface of the specimen 2 The surface is obviously fuzzy (or) pilling, and the balls of different sizes and densities cover most of the surface of the specimen. 1 The surface is severely fuzzy (or) pilling, with balls of different sizes and densities covering the entire surface of the specimen

[0055] Note: If the pilling condition is between two levels, record half a level, such as "3.5".

[0056] The raw materials used in the embodiment are:

[0057] Smoothing agent: MIRALAN HTW, purchased from Huntsman;

[0058] Protease Savinase Ultra 16XL was purchased from Novozymes, with a nominal enzyme activity of 16KNPU-S / g and an actual enzyme activity of 4640U / g;

[0059] Wool fabric: double-sided gabardine, specification parameter is 230g / m2 .

[0060] The meaning of owf is the weight ratio of raw material to fabric.

[0061] Example 1

[0062] A mercerizing, shrinkage-proof and pilling-resistant finishing liquid for wool fabric comprises liquid A and liquid B; liquid A is a mixture of limonene, a penetrant JFC-6, a smoothing agent (MIRALAN HTW) and water, wherein the concentration of the penetrant JFC-6 is 1 g / L, the concentration of the smoothing agent (MIRALAN HTW) is 1 g / L, and the concentration of the limonene is 5% (owf); and liquid B is a mixture of protease Savinase Ultra 16XL, sodium bicarbonate, sophorolipids, sodium alginate and water, wherein the concentration of the protease Savinase Ultra 16XL is 1% (owf), the concentration of the sodium bicarbonate is 1% (owf), the concentration of the sophorolipids is 1 g / L, and the concentration of the sodium alginate is 5 g / L.

[0063] A method for treating wool fabrics based on mercerizing anti-shrinkage and anti-pilling finishing liquid, comprising the following steps:

[0064] (1) Limonene pretreatment:

[0065] The wool fabric was immersed in 90°C hot water for 0.5 h and then taken out; then placed in solution A and treated at 98°C for 10 min with a bath ratio of 1:30; after that, it was thoroughly washed with water and dried at 40°C for 2 h to obtain the limonene-pretreated wool fabric;

[0066] (2) Complex enzyme treatment:

[0067] The wool fabric pretreated with limonene was placed in solution B and treated at a bath ratio of 1:30, pH 8.5, and 50°C for 30 minutes. After the treatment, the temperature of the complex enzyme treatment solution was raised to 90°C for 10 minutes to inactivate the enzyme, and then the fabric was thoroughly washed with water and dried at 40°C for 2 hours to obtain shrinkage-resistant and pilling-resistant wool fabric.

[0068] The apparent characterization of the obtained wool fabric is shown in Figure 1 .

[0069] from Figure 1 It can be seen that the scale layer on the surface of the wool fabric fibers is destroyed, the scales become thinner, and the edges are jagged, indicating that the method of the present invention can effectively act on the wool scale layer.

[0070] Example 2

[0071] The time of the composite enzyme treatment in step (2) of Example 1 was adjusted to 120 min, and the other steps were kept consistent with Example 1 to obtain a shrinkage-resistant and pilling-resistant wool fabric.

[0072] Example 3

[0073] The concentration of limonene in solution A of step (1) of Example 1 was adjusted to 20% owf, and the other contents were kept the same as in Example 1 to obtain a shrinkage-resistant and pilling-resistant wool fabric.

[0074] Example 4

[0075] The concentration of limonene in solution A of step (1) of Example 1 was adjusted to 1% owf, and the other contents remained the same as in Example 1 to obtain a shrinkage-resistant and pilling-resistant wool fabric.

[0076] Example 5

[0077] The concentration of limonene in solution A of step (1) of Example 1 was adjusted to 10% owf, and the other contents remained the same as in Example 1 to obtain a shrinkage-resistant and pilling-resistant wool fabric.

[0078] Comparative Example 1

[0079] The sophorolipids and sodium alginate in solution B of step (1) of Example 1 were omitted, and the other steps were the same as those of Example 1 to obtain a shrinkage-resistant and pilling-resistant wool fabric.

[0080] Comparative Example 2

[0081] The temperature of the limonene pretreatment in step (1) of Example 1 was adjusted to 80° C. and the time was adjusted to 4 h. Other conditions were kept consistent with Example 1 to obtain a shrinkage-resistant and pilling-resistant wool fabric.

[0082] Comparative Example 3: Limonene Pretreatment Only

[0083] The multienzyme treatment in step (2) of Example 1 was omitted; only limonene pretreatment was used;

[0084] The details are as follows:

[0085] Limonene, penetrant JFC-6, smoothing agent (MIRALAN HTW) and water were mixed uniformly to form solution A; wherein the concentration of penetrant JFC-6 was 1 g / L, the concentration of smoothing agent (MIRALAN HTW) was 1 g / L, and the concentration of limonene was 5% owf;

[0086] The wool fabric was immersed in 90°C hot water for 0.5 h and then taken out; then placed in solution A and treated at 98°C for 10 min at a bath ratio of 1:30; after the treatment, it was thoroughly washed with water and dried at 40°C for 2 h to obtain the limonene-pretreated wool fabric.

[0087] Comparative Example 4: Compound enzyme treatment only

[0088] The limonene pretreatment in step (1) of Example 1 was omitted; only the composite enzyme treatment was used;

[0089] The details are as follows:

[0090] Protease Savinase Ultra 16XL, sodium bicarbonate, sophorolipid, sodium alginate and water are uniformly mixed to obtain solution B; wherein the concentration of protease Savinase Ultra 16XL is 1% owf, the concentration of sodium bicarbonate is 1% owf, the concentration of sophorolipid is 1 g / L, and the concentration of sodium alginate is 5 g / L;

[0091] The wool fabric was immersed in 90°C hot water for 0.5 h and then taken out; placed in solution B and treated at a bath ratio of 1:30, pH 8.5, and 50°C for 30 min; after completion, the temperature of the complex enzyme treatment solution was raised to 90°C and treated for 10 min to inactivate the enzyme, followed by thorough water washing and drying at 40°C for 2 h to obtain shrinkage-resistant and pilling-resistant wool fabric.

[0092] The appearance of the wool fabric obtained is shown in Figure 2 .

[0093] from Figure 2 It can be seen that the wool scales are severely curled up, indicating that the enzyme mainly acts on the CMC layer rather than the scale surface.

[0094] Comparative Example 5

[0095] Step (1) of Example 1 was adjusted to CTAB pretreatment, and the other steps were kept the same as in Example 1 to obtain treated wool fabric;

[0096] The details are as follows:

[0097] A wool fabric mercerizing, shrinkage-proof and pilling-resistant finishing liquid comprises liquid A and liquid B; liquid A is a mixture of CTAB, sodium phosphate, hydrogen peroxide, a chelating agent (Dequest2066, Solutia), a defoaming agent (PD2005 / 049B, Stephensons), a penetrant JFC-6, a smoothing agent (MIRALAN HTW) and water, wherein the concentrations of the penetrant JFC-6, the smoothing agent (MIRALAN HTW), the CTAB, the sodium phosphate, the hydrogen peroxide, the chelating agent (Dequest2066, Solutia) and the defoaming agent (PD2005 / 049B, Stephensons) are 1 g / L, the concentrations of CTAB, the sodium phosphate, the hydrogen peroxide, the chelating agent (Dequest2066, Solutia) and the defoaming agent (PD2005 / 049B, Stephensons) are 0.5 g / L; and liquid B is a protease Savinase Ultra A mixture of Savinase Ultra 16XL, sodium bicarbonate, sophorolipids, sodium alginate and water, wherein the concentration of the protease Savinase Ultra 16XL is 1% owf, the concentration of sodium bicarbonate is 1% owf, the concentration of sophorolipids is 1 g / L, and the concentration of sodium alginate is 5 g / L.

[0098] A method for treating wool fabrics based on mercerizing anti-shrinkage and anti-pilling finishing liquid, comprising the following steps:

[0099] (1) CTAB pretreatment:

[0100] The wool fabric was immersed in 90°C hot water for 0.5 h and then taken out; then placed in solution A and treated at 50°C for 60 min with a bath ratio of 1:30; after that, it was thoroughly washed with water and dried at 40°C for 2 h to obtain the CTAB pretreated wool fabric;

[0101] (2) Acidification to remove CTAB: Acidify the wool fabric pretreated with CTAB (5.3-5.5), let it stand for 10 minutes, and then wash it thoroughly with clean water.

[0102] (3) Complex enzyme treatment:

[0103] The acidified wool fabric was placed in liquid B and treated at a bath ratio of 1:30, pH 8.5, and 50°C for 30 minutes. After the treatment, the temperature of the complex enzyme treatment liquid was raised to 90°C for 10 minutes to inactivate the enzyme, and then the fabric was thoroughly washed with water and dried at 40°C for 2 hours to obtain shrinkage-resistant and pilling-resistant wool fabric.

[0104] The treated wool fabric was subjected to performance tests, and the results were as follows:

[0105] Although the CTAB / alkali combination has a degreasing effect, acidification with acid cannot effectively remove CTAB, which seriously interferes with the subsequent enzyme treatment effect.

[0106] Comparative Example 6

[0107] The limonene in Example 1 was adjusted to be peregal O, and the other parts were kept consistent with Example 1 to obtain a treated wool fabric.

[0108] Comparative Example 7: 2nd limonene pretreatment

[0109] The wool fabric was treated twice according to the method of Comparative Example 3 to obtain treated wool fabric.

[0110] Comparative Example 8: 2nd compound enzyme treatment

[0111] The wool fabric was treated twice according to the method of Comparative Example 4 to obtain treated wool fabric.

[0112] Comparative Example 9: Only high concentration of limonene was treated

[0113] The limonene concentration in Comparative Example 3 was increased to 20% owf, and the other conditions were kept the same as those in Comparative Example 3 to obtain treated wool fabric.

[0114] Comparative Example 10: Only high concentration compound enzyme treatment

[0115] The concentration of the protease Savinase Ultra 16XL in Comparative Example 4 was increased to 10% owf, and the other conditions were kept the same as those in Comparative Example 4 to obtain treated wool fabric.

[0116] The wool fabrics obtained in the examples and comparative examples were subjected to performance tests. The test results are shown in Table 2:

[0117] Table 2 Performance test results

[0118] example Felt shrinkage (%) Strength loss rate (%) Anti-pilling (grade) Raw wool fabric 23.17 - Level 1 Example 1 4.5 2.27 4.5 Example 2 3.32 4.51 4.5 Example 3 3.82 0.10 5 Example 4 4.94 3.20 4 Example 5 3.58 0.39 5 Comparative Example 1 5.73 4.98 4 Comparative Example 2 5.12 5.13 4 Comparative Example 3 9.71 0.01 3 Comparative Example 4 13.27 8.00 3 Comparative Example 5 12.04 9.08 3 Comparative Example 6 13.56 8.50 3 Comparative Example 7 9.73 0.50 3 Comparative Example 8 10.89 12.30 3.5 Comparative Example 9 9.62 0.20 3 Comparative Example 10 9.79 27.89 3.5

[0119] From Table 2 we can see that:

[0120] (1) It can be seen from Examples 1-5 that the combination of limonene pretreatment and complex enzyme treatment can achieve a wool fabric with a felt shrinkage rate of less than 5%, a strength loss rate of less than 4.51%, and a pilling resistance of level 4 or above; and further increase in limonene does not significantly improve the effect; higher limonene pretreatment temperatures will affect the properties of the wool itself;

[0121] (2) By comparing Example 1 with Comparative Example 1, it can be seen that the addition of sophorolipids and sodium alginate is very important;

[0122] (3) By comparing Example 1 and Comparative Example 2, it can be seen that the temperature of limonene pretreatment is critical;

[0123] (4) Comparison of Example 1 with Comparative Examples 3 and 4 shows that limonene pretreatment or compound enzyme treatment alone cannot simultaneously achieve very low felt shrinkage and strength loss rates;

[0124] (5) Comparison of Example 1 with Comparative Examples 5 and 6 shows that the selection of limonene is critical;

[0125] (6) Comparison of Example 1 and Comparative Examples 7-10 shows that two limonene pretreatments or compound enzyme treatments, or limonene pretreatments or compound enzyme treatments at too high a concentration, cannot simultaneously achieve very low felt shrinkage and strength loss rates.

[0126] Although the present invention has been disclosed above in terms of preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this technology can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the definition of the claims.

Claims

1. A method for mercerizing wool fabrics with limonene-complex enzyme for shrinkage and pilling prevention, characterized in that: The steps include: (1) Limonene pretreatment: The wool fabric is immersed in hot water at 70-90°C for 20-40 minutes and then taken out; then placed in solution A and treated at 85-98°C for 10-120 minutes at a bath ratio of 1:20-1:50; then thoroughly washed with water and dried to obtain a limonene-pretreated wool fabric; the solution A contains limonene, a penetrant, a smoothing agent and water, wherein the concentration of the penetrant is 0.5-2 g / L, the concentration of the smoothing agent is 0.5-1.5 g / L, and the concentration of limonene is 1-20% owf; (2) Compound enzyme treatment: The wool fabric pretreated with limonene is placed in liquid B and treated at a bath ratio of 1:20-1:50 at a pH of 8-9 and 40-60° C. for 30-120 minutes. After the treatment, the enzyme is inactivated, the fabric is washed with water, and dried to obtain a shrinkage-resistant and pilling-resistant wool fabric. Liquid B contains protease Savinase Ultra 16XL, sodium bicarbonate, sophorolipid, sodium alginate, and water, wherein the concentration of the protease Savinase Ultra 16XL is 1-10% owf, the concentration of the sodium bicarbonate is 0.5-2% owf, the concentration of the sophorolipid is 0.5-2 g / L, and the concentration of the sodium alginate is 1-10 g / L.

2. The method according to claim 1, characterized in that The limonene concentration of solution A in step (1) is 10-20% owf.

3. The method according to claim 1, characterized in that The pretreatment in step (1) is performed at 98°C for 10-60 minutes.

4. The method according to claim 1, wherein In step (2), the complex enzyme treatment is carried out at 50°C for 30-120 minutes.

5. The method according to claim 1, wherein The wool fabric described in step (1) includes any one of pure wool gabardine, serge, and varnish worsted fabric.

6. The method according to claim 1, characterized in that In step (2), the enzyme is inactivated by raising the temperature of the complex enzyme treatment solution to 80-90°C for 10-20 minutes.

7. The shrinkage-resistant and pilling-resistant wool fabric prepared by the method according to any one of claims 1 to 6.

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