A preparation process of cashmere modified by natural plants

Abstract

The present invention relates to the technical field of cashmere preparation, and in particular to a preparation process of cashmere modified by natural plants, wherein the cashmere is treated by collagenase enzymolysis, soaked in water with loofah and ginkgo leaves, and then treated with a modifier, so that the cashmere has good softness, comfort and elasticity, and the strength and performance of the cashmere are significantly enhanced, and the anti-pilling is also significantly improved, and the cashmere has significant antibacterial properties, and the dyeing is more uniform. Moreover, when the weight ratio of the loofah extract and the ginkgo leaf extract in the modifier is 2.6:1, the softness, elasticity and anti-pilling effect of the cashmere are most significant, and once the weight ratio changes significantly, the performance of the cashmere is significantly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of cashmere preparation, in particular to a preparation process for cashmere modified by natural plants. Background Art

[0002] The existing cashmere sweaters have many processing steps and complicated procedures during the preparation process. In addition, the anti-pilling ability of the prepared cashmere sweaters is not good enough. During the actual wearing process, the hand feel is poor and the sweaters do not have high elasticity.

[0003] The patented technology of "Method for modifying cashmere fiber using mugwort" (CN110241606A) involves treating cashmere with microwaves, soaking it in mugwort water, and then adding a modifier. However, the resulting modified cashmere is not elastic enough, is not very soft, and has poor dyeing effect. Moreover, microwave treatment will cause certain physical damage to the cashmere, making it fragile and reducing its durability. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] Based on the technical problems existing in the background technology, the present invention provides a new processing technology which makes full use of loofah and ginkgo leaves and basically does not add chemical reagents in the whole processing process, thereby solving the problems that in the preparation process of the existing cashmere sweaters, there are many processing processes and the procedures are relatively complicated, and the prepared cashmere sweaters have poor anti-pilling ability, poor hand feel, lack of high elasticity and poor dyeing effect during actual wearing.

[0006] (II) Technical solution

[0007] The present invention achieves the above object through the following technical solutions:

[0008] The method for modifying cashmere by using loofah and ginkgo leaves comprises the following steps: cleaning, enzymatic treatment, modification treatment and washing.

[0009] The invention discloses a method for modifying cashmere by using loofah and ginkgo leaf, and in the modification process, tocopherol, hydrogenated polyisobutylene, loofah and ginkgo leaf extract are added as modifying agents.

[0010] More specifically, the method of modifying cashmere using loofah and ginkgo leaves is as follows:

[0011] S1: Add clean cashmere to the penetrant to make it swell, then dissolve collagenase in distilled water, and then soak the swollen cashmere in it. It can be turned over appropriately during the period. After the time is up, the enzyme is inactivated, and then it is washed with clean water at room temperature and naturally air-dried;

[0012] S2: Soak the enzymatically hydrolyzed cashmere in a loofah and ginkgo leaf water for 30-40 minutes, then take it out and drain the water;

[0013] S3: adding a modifier to the cashmere and making the modifier evenly adhere to the surface of the cashmere, and finally washing with deionized water to obtain modified cashmere.

[0014] Furthermore, the cashmere cleaning method in step S1 is as follows: cashmere with a fiber length of about 55 to 75 mm is selected so that the cashmere sweater produced later is not easy to pilling, and then the cashmere is soaked in warm water at 30 to 38°C and cleaned with cashmere detergent, and then disinfected and dried.

[0015] Furthermore, in step S1, collagenase with an activity of 600,000 u / g is selected, the final concentration of collagenase is controlled at a mass fraction of 1.5-1.7%, the pH is controlled at 7.5-8.0, and the soaking treatment is performed for 10-15 minutes.

[0016] Furthermore, the enzyme inactivation conditions in step S1 are: enzyme inactivation treatment at 90-95° C. for 5-8 min.

[0017] Furthermore, the preparation method of the loofah and ginkgo leaf water in step S2 is as follows: clean the loofah and ginkgo leaf, boil them in boiling water with a weight ratio of 1:20-25 to boiling water for 20-30 minutes, and cool them to 30-35°C.

[0018] Furthermore, in step S3, the modifier comprises tocopherol, hydrogenated polyisobutylene, luffa and ginkgo leaf extract, and the amounts of tocopherol, hydrogenated polyisobutylene, luffa and ginkgo leaf extract are 0.5-1%, 2-4% and 0.8-3% of the weight of the cashmere, respectively.

[0019] Furthermore, the coating method of the modifier in step S3 is as follows: first coat tocopherol and hydrogenated polyisobutylene for 2 hours, then evenly coat the loofah and ginkgo leaf extract on the surface of the cashmere for 20 to 30 minutes, and then evenly coat the loofah and ginkgo leaf extract on the surface of the cashmere again for 20 to 30 minutes. The amount of the two coatings is 2:1.

[0020] Furthermore, in the method of modifying cashmere using loofah and ginkgo leaves, the preparation methods of the loofah extract and the ginkgo leaf extract are as follows:

[0021] (1) Rinse the dried loofah or ginkgo leaf raw material with clean water, dry it, and then repeatedly mechanically crush it with a weight method, pass it through a 800-1000 mesh sieve, and take the sieve residue;

[0022] (2) adding the sieved loofah or ginkgo leaf powder into water, adding a dispersant, heating to 45-50° C., and performing ultrasonic dispersion at a frequency of 40-60 kHz for 5-10 min to obtain a paste;

[0023] (3) adding cellulase and hemicellulase to the paste for enzymolysis, and inactivating the enzymes after the enzymolysis is completed;

[0024] (4) The enzymatic hydrolyzate in (3) is concentrated and extracted with supercritical carbon dioxide to obtain a loofah extract or a ginkgo leaf powder extract.

[0025] In the above extraction methods of loofah extract and ginkgo leaf extract, the specific conditions of each step are as follows:

[0026] In step (3), the cellulase and hemicellulase account for 0.5-0.8% and 0.5-1.0% of the weight of the loofah or ginkgo leaf, respectively, the enzymolysis time is 30-60 min, the temperature is 35-45° C., and the enzyme inactivation condition is 92-100° C. for 5-8 min;

[0027] In step (4), the volume of the original enzymatic hydrolysate is concentrated to 1 / 3; the supercritical carbon dioxide extraction conditions are: pressure of 15-25 MPa, extraction temperature of 30-37°C, and analytical kettle temperature of 40-50°C.

[0028] At present, collagenase is mainly used in the fields of medicine and biological research, skin care and beauty, food industry, biotechnology, etc., and there is no report that collagenase is used in textile industry such as cashmere. In the present invention, cashmere is washed and soaked in collagenase solution, and wool fiber contains a certain amount of collagen, and collagen on the surface of wool fiber can be partially hydrolyzed by collagenase treatment, so that -CONH in the keratinized protein amino acid in the cashmere fiber scale layer is gradually hydrolyzed, and then the scale treatment "open state" on the surface of cashmere is conducive to the entry of modifiers tocopherol and hydrogenated polyisobutylene to act on it, which can significantly improve the tensile strength and surface contact angle of cashmere, and reduce the elongation at break; and opening the hair scales can also significantly improve the softness of cashmere. In addition, the active ingredients in loofah and ginkgo leaf extract also enter the inside of cashmere, and the effective ingredients therein are recombined with the molecular chains of some components in cashmere, changing the internal structure of cashmere fiber, so that the cashmere fiber fracture phenomenon is reduced during processing, and the softness and elasticity can be enhanced, and the cashmere is also made more elastic and textured. The inventors have also found that the loofah extract and the ginkgo leaf extract have a synergistic effect when used to treat cashmere at a certain weight ratio.

[0029] Furthermore, the weight ratio of the loofah extract to the ginkgo leaf extract is (1.8-3.5):1.

[0030] Preferably, the weight ratio of the loofah extract to the ginkgo leaf extract is 2.6:1.

[0031] There are scales on the surface of cashmere fibers. The untreated scales are thicker and the fibers are coarser, which will cause itching when in direct contact with the skin. The loofah extract is rich in natural polysaccharides and amino acids. Among them, galactan helps to improve the softness and elasticity of cashmere fabrics by enhancing the adhesion between cells, making it more comfortable and close-fitting. After modification, the scales on the surface of cashmere fibers are blunted, the thickness becomes thinner, the fibers become thinner, and the edges become smooth, which improves the itching of wool and has a better feel. It will be more skin-friendly and soft during actual wearing. Mannan contains a large number of hydrophilic -OH functional groups, which can maintain the softness of cashmere fibers by regulating moisture, and also help to enhance the internal structure of cashmere fibers, making them more durable and not easy to break. Due to its good viscosity and solubility, xylan can increase the surface activity of cashmere fibers during the modification process, making it easier to combine with dye molecules, thereby improving dyeing efficiency and color brightness. At the same time, these rich natural polysaccharides and amino acids can also enhance the strength and toughness of cashmere, form a protective film on the surface of cashmere, reduce friction and prevent pilling, and extend the service life of cashmere. The antioxidant and antibacterial properties of ginkgo leaf extract are retained, and it contains a large amount of flavonoids and polyphenols, which can effectively prevent cashmere fiber from aging, improve its anti-pilling performance, and effectively inhibit bacterial growth. In addition, loofah and ginkgo leaf extracts are rich in natural moisturizing factors, which have hygroscopicity and moisturizing properties and can absorb and lock moisture. After combining with cashmere, a protective layer is formed on the cashmere fiber to lock moisture. When the cashmere fiber retains enough moisture, the friction between the fibers will naturally decrease, making the fiber softer; at the same time, the presence of moisture can also reduce the generation of static electricity, reduce the irritation of the fiber to the skin, and improve the comfort of the wearer. When the weight ratio of loofah extract and ginkgo leaf extract is 2.6:1, the softness, elasticity and anti-pilling effect of cashmere are most significant, and the effect is significantly reduced when the weight ratio changes significantly. This is because when the weight ratio is 2.6:1, the synergistic effect between loofah extract and ginkgo leaf extract reaches the best balance. Polysaccharides not only provide a stable microenvironment for flavonoids, but also promote the best performance of the components in the system, synergistically enhancing the multiple functions of cashmere. When the weight ratio changes, the interaction between them will be destroyed, which in turn affects the effect.

[0032] (III) Beneficial effects

[0033] The beneficial effect of the present invention is that after the cashmere is treated with collagenase enzymatic hydrolysis, soaked in loofah and ginkgo leaf water, and then treated with a modifier, the cashmere has good softness, comfort and elasticity, and the strength and toughness of the cashmere are significantly enhanced, and the anti-pilling is also significantly improved. The cashmere also has significant antibacterial properties and more uniform dyeing. Moreover, when the weight ratio of the loofah extract and the ginkgo leaf extract in the modifier is 2.6:1, the softness, elasticity and anti-pilling effect of the cashmere are most significant. Once the weight ratio changes significantly, the performance of the cashmere is significantly reduced. DETAILED DESCRIPTION

[0034] The technical scheme of the present invention is further described below through specific examples. Unless otherwise specified in the present invention, the raw materials and equipment used can be purchased from the market or are commonly used in the art, and the methods in the embodiments are conventional methods in the art unless otherwise specified.

[0035] Example 1

[0036] The preparation method of loofah sponge and ginkgo leaf extract is as follows:

[0037] (1) The dried loofah or ginkgo leaf raw material is rinsed with clean water, and after drying, it is repeatedly mechanically crushed by a weight method, passed through an 800 mesh sieve, and the sieve underflow is taken;

[0038] (2) adding the sieved loofah or ginkgo leaf powder into water, adding a dispersant, heating to 45-50° C., and performing ultrasonic dispersion at a frequency of 40 kHz for 5 min to obtain a paste;

[0039] (3) adding cellulase and hemicellulase to the paste for enzymolysis, wherein the cellulase and hemicellulase account for 0.5% and 0.6% of the weight of the loofah or ginkgo leaf, respectively, the enzymolysis time is 30 minutes, the temperature is 35° C., and the enzyme is inactivated after the enzymolysis is completed, and the enzyme inactivation conditions are: inactivation at 92° C. for 5 minutes;

[0040] (4) concentrating the enzymatic hydrolysate in (3) to 1 / 3 of the volume of the original enzymatic hydrolysate, and then extracting it with supercritical carbon dioxide under the following conditions: pressure 15 MPa, temperature 30° C., and desorption kettle temperature 40° C., to obtain a loofah extract or a ginkgo leaf powder extract;

[0041] (5) The prepared loofah extract and ginkgo leaf extract were weighed so that the weight ratio of the two was 1.8:1, and then the two were mixed to obtain loofah and ginkgo leaf extract.

[0042] A preparation process of cashmere modified by natural plants, comprising the following steps:

[0043] S1: Select cashmere with a fiber length of about 55 mm, soak the cashmere in 30°C warm water, wash it with cashmere detergent, disinfect and dry it, then add the penetrant to soak the cashmere to make it swell, soak the swollen cashmere in a collagenase solution with a mass fraction of 1.5% and a pH of 7.5 for 10 minutes, inactivate the enzyme at 90°C for 5 minutes, then wash it with clean water at room temperature and air dry it naturally;

[0044] S2: clean the loofah and ginkgo leaves, put them in boiling water with a weight ratio of 1:20 to boiling water, boil for 20 minutes, cool to 30°C to obtain loofah and ginkgo leaf water, soak the microwave-treated cashmere in the loofah and ginkgo leaf water for 30 minutes, take out and drain the water;

[0045] S3: Adding modifiers to the cashmere, the modifiers include tocopherol, hydrogenated polyisobutylene, loofah and ginkgo leaf extract, the amounts of tocopherol, hydrogenated polyisobutylene, loofah and ginkgo leaf extract are 0.5%, 2.0% and 0.8% of the weight of the cashmere, respectively, and making the modifiers evenly attached to the surface of the cashmere, first coating tocopherol and hydrogenated polyisobutylene, keeping for 2 hours, then coating loofah and ginkgo leaf extract evenly on the surface of the cashmere, keeping for 20 minutes, then coating loofah and ginkgo leaf extract evenly on the surface of the cashmere again, keeping for 20 minutes, the amount of the two coatings is 2:1, and finally washing with deionized water to obtain modified cashmere.

[0046] Example 2

[0047] The preparation method of loofah sponge and ginkgo leaf extract is as follows:

[0048] (1) the dried loofah or ginkgo leaf raw material is rinsed with clean water, and after drying, it is repeatedly mechanically crushed by a weight method, passed through a 900 mesh sieve, and the sieve underflow is taken;

[0049] (2) adding the sieved loofah or ginkgo leaf powder into water, adding a dispersant, heating to 45-50° C., and performing ultrasonic dispersion at a frequency of 50 kHz for 8 min to obtain a paste;

[0050] (3) adding cellulase and hemicellulase to the paste for enzymolysis, wherein the cellulase and hemicellulase account for 0.65% and 0.8% of the weight of the loofah or ginkgo leaf, respectively, the enzymolysis time is 40 minutes, the temperature is 40° C., and after the enzymolysis is completed, the enzyme is inactivated at 96° C. for 6.5 minutes;

[0051] (4) concentrating the enzymatic hydrolysate in (3) to 1 / 3 of the volume of the original enzymatic hydrolysate, and then extracting it with supercritical carbon dioxide under the following conditions: pressure 20 MPa, temperature 33.5° C., and desorption kettle temperature 45° C., to obtain a loofah extract or a ginkgo leaf powder extract;

[0052] (5) The prepared loofah extract and ginkgo leaf extract were weighed so that the weight ratio of the two was 2.6:1, and then the two were mixed to obtain loofah and ginkgo leaf extract.

[0053] A preparation process of cashmere modified by natural plants, comprising the following steps:

[0054] S1: Select cashmere with a fiber length of about 65 mm, soak the cashmere in 34°C warm water, wash it with cashmere detergent, disinfect and dry it, then add the penetrant to soak it to make it swell, soak the swollen cashmere in a collagenase solution with a mass fraction of 1.7% and a pH of 8.0 for 15 minutes, then treat it at 95°C to inactivate the enzyme for 8 minutes, then wash it with clean water at room temperature and air dry it naturally;

[0055] S2: clean the loofah and ginkgo leaves, put them in boiling water with a weight ratio of 1:22.5 to boiling water, boil for 25 minutes, cool to 32.5°C to obtain loofah and ginkgo leaf water, soak the enzymatically hydrolyzed cashmere in the loofah and ginkgo leaf water for 35 minutes, take out and drain the water;

[0056] S3: Adding modifiers to the cashmere, the modifiers include tocopherol, hydrogenated polyisobutylene, loofah and ginkgo leaf extract, the amounts of tocopherol, hydrogenated polyisobutylene, loofah and ginkgo leaf extract are 0.75%, 3.0% and 2.0% of the weight of the cashmere, respectively, and the modifiers are evenly attached to the surface of the cashmere. When coating, tocopherol and hydrogenated polyisobutylene are first coated and kept for 2 hours, and then loofah and ginkgo leaf extract are evenly coated on the surface of the cashmere and kept for 25 minutes. The loofah and ginkgo leaf extract are evenly coated on the surface of the cashmere again and kept for 25 minutes. The amount of the two coatings is 2:1. Finally, the cashmere is washed with deionized water to obtain the modified cashmere.

[0057] Example 3

[0058] The preparation method of loofah sponge and ginkgo leaf extract is as follows:

[0059] (1) Rinse the dried loofah or ginkgo leaf raw material with clean water, dry it and repeatedly mechanically crush it with a weight method, pass it through a 1000 mesh sieve, and take the sieve undersize;

[0060] (2) adding the sieved loofah or ginkgo leaf powder into water, adding a dispersant, heating to 45-50° C., and performing ultrasonic dispersion at a frequency of 60 kHz for 10 min to obtain a paste;

[0061] (3) adding cellulase and hemicellulase to the paste for enzymolysis, wherein the cellulase and hemicellulase account for 0.8% and 1.0% of the weight of the loofah or ginkgo leaf, respectively, the enzymolysis time is 60 minutes, the temperature is 45° C., and the enzyme is inactivated after the enzymolysis is completed, and the enzyme inactivation conditions are: inactivation at 100° C. for 8 minutes;

[0062] (4) concentrating the enzymatic hydrolysate in (3) to 1 / 3 of the volume of the original enzymatic hydrolysate, and then extracting it with supercritical carbon dioxide under the following conditions: pressure 25 MPa, temperature 37° C., and desorption kettle temperature 50° C., to obtain a loofah extract or a ginkgo leaf powder extract;

[0063] (5) The prepared loofah extract and ginkgo leaf extract were weighed so that the weight ratio of the two was 3.5:1, and then the two were mixed to obtain loofah and ginkgo leaf extract.

[0064] A preparation process of cashmere modified by natural plants, comprising the following steps:

[0065] S1: Select cashmere with a fiber length of about 75 mm, soak the cashmere in warm water at 38°C, wash it with cashmere detergent, disinfect and dry it, then add the penetrant to soak it to make it swell, soak the swollen cashmere in a collagenase solution with a mass fraction of 1.6% and a pH of 7.8 for 12.5 minutes, inactivate the enzyme at 92.5°C for 6.5 minutes, then wash it with clean water at room temperature and air dry it naturally;

[0066] S2: clean the loofah and ginkgo leaves, put them in boiling water with a weight ratio of 1:22.5 to boiling water, boil for 25 minutes, cool to 32.5°C to obtain loofah and ginkgo leaf water, soak the microwave-treated cashmere in the loofah and ginkgo leaf water for 35 minutes, take out and drain the water;

[0067] S3: Adding modifiers to the cashmere, the modifiers include tocopherol, hydrogenated polyisobutylene, loofah and ginkgo leaf extract, the amounts of tocopherol, hydrogenated polyisobutylene, loofah and ginkgo leaf extract are 0.75%, 3.0% and 3.0% of the weight of the cashmere, respectively, and the modifiers are evenly attached to the surface of the cashmere. When coating, tocopherol and hydrogenated polyisobutylene are first coated and kept for 2 hours, and then loofah and ginkgo leaf extract are evenly coated on the surface of the cashmere and kept for 30 minutes. The loofah and ginkgo leaf extract are evenly coated on the surface of the cashmere again and kept for 30 minutes. The amount of the two coatings is 2:1. Finally, the cashmere is washed with deionized water to obtain the modified cashmere.

[0068] Comparative Example 1

[0069] Same as Example 2, except that the loofah in step (2) and step S2 is omitted, and the rest are the same.

[0070] Comparative Example 2

[0071] Same as Example 2, except that the ginkgo leaves are not included in step (2) and step S2, and the rest are the same.

[0072] Comparative Example 3

[0073] Same as Example 2, except that the weight ratio of the loofah extract to the ginkgo leaf extract in step (5) is 1:1, and the rest are the same.

[0074] Performance Check

[0075] The modified cashmere fibers in Examples 1 to 3 and Comparative Examples 1 to 3 were tested:

[0076] Table 1 shows the test results of the cashmere prepared in Examples 1 to 3 and Comparative Examples 1 to 3.

[0077] Table 1 Cashmere performance comparison table

[0078] Test items Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Bursting strength KPa 344 362 338 298 306 245 Color fastness to abrasion (grade) 4 5 5 4 3 3 Anti-pilling(grade) 5 5 4 4 4 2 Antibacterial rate% 98.6％ 99.2％ 99.1％ 97.1％ 98.2％ 97.8％ dyeing Uniform Uniform Uniform Uneven Uneven Uniform Curl elastic recovery rate 80.56％ 87.82％ 79.34％ 72.32％ 70.54％ 66.51％

[0079] From the data in Table 1, it can be seen that the cashmere of the present invention is treated by collagenase enzymolysis, soaked in water with loofah and ginkgo leaves, and then treated with a modifier, so that the cashmere has good softness, comfort and elasticity, and the strength and resistance to external forces of the cashmere are significantly enhanced, and the anti-pilling performance is also significantly improved. The cashmere also has significant antibacterial properties, good soap color fastness, good color fixation effect, and uniform dyeing. In Example 2, the weight ratio of the loofah extract and the ginkgo leaf extract is 2.6:1, and the softness, elasticity and anti-pilling effect of the cashmere are most significant. When the weight ratio changes greatly, the cashmere performance is significantly reduced when the ratio of Example 1 is 1.8:1 and the ratio of Example 3 is 3.5:1. And because of the lack of a plant extract in Comparative Example 1-2, the performance of the cashmere in all aspects is much worse; and in Comparative Example 3, the weight ratio of the loofah extract and the ginkgo leaf extract is 1:1, which is lower than the range of 1.8 to 3.5:1 in the embodiment, and the performance of the modified cashmere obtained is significantly lower than that of each group of embodiments.

[0080] The present invention is not limited to the above optional implementations, and anyone can derive other various forms of products under the enlightenment of the present invention. The above specific implementations should not be understood as limiting the scope of protection of the present invention. The scope of protection of the present invention should be based on the definition in the claims, and the description can be used to interpret the claims.

Claims

1. A preparation process for cashmere modified by natural plants, characterized in that: The method for modifying cashmere by adding a modifier during the modification process comprises the following steps: cleaning, enzymatic treatment, modification treatment and washing. The modifier comprises tocopherol, hydrogenated polyisobutylene, luffa and ginkgo leaf extract. The amounts of the tocopherol, hydrogenated polyisobutylene, luffa and ginkgo leaf extract are 0.5-1%, 2-4% and 0.8-3% of the weight of the cashmere respectively. The weight ratio of the luffa extract to the ginkgo leaf extract is 1.8-3.5:

1.

2. The process for preparing cashmere modified by natural plants according to claim 1, characterized in that: The preparation methods of the loofah extract and the ginkgo leaf extract are as follows: (1) Rinse the dried loofah or ginkgo leaf raw material with clean water, dry it, and then repeatedly mechanically crush it with a weight method, pass it through an 800-1000 mesh sieve, and take the sieve residue; (2) adding the sieved loofah or ginkgo leaf powder into water, adding a dispersant, heating to 45-50° C., and performing ultrasonic dispersion at a frequency of 40-60 kHz for 5-10 min to obtain a paste; (3) adding cellulase and hemicellulase to the paste for enzymolysis, and inactivating the enzymes after the enzymolysis is completed; (4) The enzymatic hydrolyzate in (3) is concentrated and extracted with supercritical carbon dioxide to obtain a loofah extract or a ginkgo leaf powder extract.

3. The process for preparing cashmere modified by natural plants according to claim 2, characterized in that: In the step (3), the cellulase and hemicellulase account for 0.5-0.8% and 0.5-1.0% of the weight of the loofah or ginkgo leaf respectively, the enzymolysis time is 30-60 minutes, the enzymolysis temperature is 35-45°C, and the enzyme inactivation conditions are: 92-100°C for 5-8 minutes; in the step (4), the volume of the enzymolysis solution is concentrated to 1 / 3 of the original enzymolysis solution, and the supercritical carbon dioxide extraction conditions are: pressure of 15-25MPa, extraction temperature of 30-37°C, and analytical kettle temperature of 40-50°C.

4. The process for preparing cashmere modified by natural plants according to claim 1, characterized in that: The specific operation method of the preparation process is as follows: S1: Add clean cashmere to the penetrant to make it swell, then dissolve collagenase in distilled water, and then soak the swollen cashmere in it. It can be turned over appropriately during the period. After the time is up, the enzyme is inactivated, and then it is washed with clean water at room temperature and naturally air-dried; S2: Soak the enzymatically hydrolyzed cashmere in a loofah and ginkgo leaf water for 30-40 minutes, then take it out and drain the water; S3: adding a modifier to the cashmere and making the modifier evenly adhere to the surface of the cashmere, and finally washing with deionized water to obtain modified cashmere.

5. The process for preparing cashmere modified by natural plants according to claim 4, characterized in that: The cashmere cleaning method in step S1 is as follows: cashmere with a fiber length of about 55 to 75 mm is selected, and then the cashmere is soaked in warm water at 30 to 38° C., and cleaned with a cashmere detergent, and then disinfected and dried.

6. The process for preparing cashmere modified by natural plants according to claim 4, characterized in that: In the step S1, collagenase with an activity of 600,000 u / g is selected, the final concentration of collagenase is controlled at a mass fraction of 1.5-1.7%, the pH is controlled at 7.5-8.0, and the soaking treatment is performed for 10-15 minutes.

7. The process for preparing cashmere modified by natural plants according to claim 4, characterized in that: The enzyme inactivation conditions in step S1 are: 90-95° C. enzyme inactivation treatment for 5-8 min.

8. The process for preparing cashmere modified by natural plants according to claim 4, characterized in that: The preparation method of the loofah and ginkgo leaf water in step S2 is as follows: clean the loofah and ginkgo leaf, boil them in boiling water with a weight ratio of 1:20-25 to boiling water for 20-30 minutes, and cool them to 30-35°C.

9. The process for preparing cashmere modified by natural plants according to claim 4, characterized in that: The coating method of the modifier is as follows: firstly coat tocopherol and hydrogenated polyisobutylene for 2 hours, then coat the loofah and ginkgo leaf extract evenly on the surface of the cashmere for 20 to 30 minutes, and then coat the loofah and ginkgo leaf extract evenly on the surface of the cashmere again for 20 to 30 minutes. The dosage of the two coatings is 2:1.