A low-strength-loss and high-efficiency polishing composite enzyme for cotton fabrics and its application process

Abstract

The present invention discloses a low-strength-loss and high-efficiency polishing composite enzyme for cotton fabrics and an application process, belonging to the technical field of cotton fabric dyeing and finishing. First, the low-strength-loss and high-efficiency polishing composite enzyme is prepared by compounding sodium lignosulfonate, galactose and cellulase, wherein the mass of sodium lignosulfonate is 2-6% of that of cellulase; the mass of galactose is 3-10% of that of cellulase; then the low-strength-loss and high-efficiency polishing composite enzyme, sodium cyclamate and buffer solution are mixed evenly to obtain a polishing finishing solution; then the cotton fabric is placed in the polishing finishing solution for polishing finishing; after polishing finishing, the enzyme is inactivated, washed with water and dried to obtain the polished cotton fabric. The hairiness removal grade of the polished cotton fabric prepared by the method of the present invention reaches 4.5 levels, the pilling grade reaches 4.5 levels, the strength loss rate is below 15%, and the weight loss rate is below 5%.

Description

Technical Field

[0001] The present invention relates to a low-strength-loss and high-efficiency polishing composite enzyme for cotton fabrics and an application process, belonging to the technical field of cotton fabric dyeing and finishing. Background Art

[0002] Cotton fabric is one of the natural fibers widely used by people. Due to its softness, good hygroscopicity, air permeability, and good wearing comfort, it is deeply favored by consumers. However, during daily wearing, due to the mutual friction of the fabric, short fibers on the fabric surface are easily broken and pulled out to form lint balls, affecting the beauty of the clothing. Therefore, physical, chemical, or biological methods are often used to polish and finish cotton fabrics.

[0003] To meet the requirements of energy conservation and emission reduction, the enzyme polishing method in biological methods has gradually replaced the past complex polishing processes such as water washing, sand washing, and singeing due to its environmental friendliness, high efficiency, etc., and has been widely promoted and applied. Biological polishing is to hydrolyze fiber substrates through cellulase, assisted by mechanical action, under certain temperature and pH conditions, to weaken the surface hairs of the fabric and break short fluff, thereby obtaining a smooth fabric surface and improving the beauty and comfort of cellulose fabrics. However, during the biological polishing process, due to the breakage of cellulose molecular chains, the fabric strength decreases, which has a greater impact on the subsequent wearing performance.

[0004] Many researchers have reduced the strength loss of cotton fabrics by improving enzyme modification (grafting, crosslinking, site-directed mutagenesis, etc.), immobilization (covalent method, adsorption method, embedding method, etc.), modification, and compounding. Among them, the compounding operation of cellulase is more convenient and has high universality.

[0005] However, what additives can be directly and effectively added to cellulase to improve the polishing treatment effect on cotton fabrics without affecting the strength of cotton fabrics is unknown. Summary of the Invention

[0006] [Technical Problem]

[0007] The existing cotton fabric polishing treatment methods will greatly damage the strength of the cotton fabric itself, thereby affecting the wearing performance.

[0008] [Technical Solution]

[0009] To solve the above problems, the present invention prepares a composite enzyme preparation by compounding sodium lignosulfonate, galactose, and cellulase; and then uses it together with sodium cyclamate in the polishing process of cotton fabrics, which improves the polishing effect of cellulase on cotton fabrics, the strength loss is less than 15%, while enhancing the anti-pilling effect, and can polish and dye in one bath, reducing production costs.

[0010] The first object of the present invention is to provide a low-strength-loss and high-efficiency polishing composite enzyme for cotton fabrics. The low-strength-loss and high-efficiency polishing composite enzyme is a mixture of cellulase, sodium lignosulfonate and galactose. Among them, the mass of sodium lignosulfonate is 2-6% of that of cellulase; the mass of galactose is 3-10% of that of cellulase.

[0011] In one embodiment of the present invention, the cellulase is neutral cellulase with an enzyme activity of 60 U / mL.

[0012] In one embodiment of the present invention, the mass of sodium lignosulfonate is 4% of that of cellulase; the mass of galactose is 5% of that of cellulase.

[0013] The second object of the present invention is to provide a method for preparing a low-strength-loss and high-efficiency polishing composite enzyme, which includes the following steps:

[0014] Mix cellulase, sodium lignosulfonate and galactose evenly.

[0015] The third object of the present invention is to provide a method for polishing cotton fabrics based on the low-strength-loss and high-efficiency polishing composite enzyme, which includes the following steps:

[0016] Mix the low-strength-loss and high-efficiency polishing composite enzyme, sodium cyclamate and buffer solution evenly to obtain a polishing finishing solution; then place the cotton fabric in the polishing finishing solution for polishing finishing; after polishing finishing, inactivate the enzyme, wash with water, and dry to obtain the polished cotton fabric.

[0017] In one embodiment of the present invention, the dosage of the low-strength-loss and high-efficiency polishing composite enzyme is 1% o.w.f - 3% o.w.f.

[0018] In one embodiment of the present invention, the buffer solution is a phosphate buffer solution with a pH of 5-6.

[0019] In one embodiment of the present invention, the concentration of sodium cyclamate in the buffer solution is 3-8 g / L, and further preferably 5 g / L.

[0020] In one embodiment of the present invention, the polishing finishing is carried out at 45-55 °C for 30-60 min.

[0021] In one embodiment of the present invention, the bath ratio of the polishing finishing is 1:10-15.

[0022] In one embodiment of the present invention, the enzyme inactivation is carried out at 95-99 °C for 8-15 min.

[0023] In one embodiment of the present invention, the water washing is cold water washing.

[0024] In one embodiment of the present invention, the drying is baking.

[0025] The fourth object of the present invention is to provide a one-bath method for polishing and dyeing cotton fabrics, and the method uses the low-strength-loss and high-efficiency polishing composite enzyme of the present invention.

[0026] In one embodiment of the present invention, the method comprises the following steps:

[0027] Mix the low-strength-loss and high-efficiency polishing composite enzyme, sodium cyclamate and buffer solution evenly to obtain a polishing finishing solution; then add reactive dyes and sodium sulfate to the polishing finishing solution to obtain a one-bath finishing solution for dyeing and polishing; then place the cotton fabric in the one-bath finishing solution for dyeing and polishing, carry out polishing and dyeing finishing, add sodium sulfate and continue finishing, add a fixing agent and continue finishing; after polishing and dyeing finishing, wash with water, wash with soap, and dry to obtain the cotton fabric after polishing and dyeing finishing.

[0028] In one embodiment of the present invention, the dosage of the low-strength-loss and high-efficiency polishing composite enzyme is 1% o.w.f - 3% o.w.f.

[0029] In one embodiment of the present invention, the buffer solution is a phosphate buffer solution with a pH of 5 - 6.

[0030] In one embodiment of the present invention, the concentration of sodium cyclamate in the buffer solution is 3 - 8 g / L, and further preferably 5 g / L.

[0031] In one embodiment of the present invention, the reactive dye includes one of reactive brilliant red K2G and reactive yellow 3RS, and the dosage of the reactive dye is 1 - 10% o.w.f.

[0032] In one embodiment of the present invention, the total concentration of sodium sulfate in the polishing finishing solution is 40 - 70 g / L, and the amounts added twice are the same.

[0033] In one embodiment of the present invention, the bath ratio of the polishing and dyeing finishing is 1:10 - 20.

[0034] In one embodiment of the present invention, the polishing and dyeing finishing is carried out at 45 - 55 °C for 30 - 60 min; adding sodium sulfate and continuing finishing is carried out at 45 - 55 °C for 30 - 60 min; adding a fixing agent and continuing finishing is carried out at 45 - 55 °C for 30 - 60 min.

[0035] In one embodiment of the present invention, the fixing agent is soda ash with a concentration of 15 - 25 g / L.

[0036] In one embodiment of the present invention, the washing with water is cold water washing.

[0037] In one embodiment of the present invention, the soaping is carried out at 95 - 99 °C for 8 - 15 min.

[0038] In one embodiment of the present invention, the drying is drying by baking.

[0039] [Beneficial effects]

[0040] (1) The present invention solves the defect of serious loss of fabric strength after conventional polishing treatment, improves the efficiency of polishing treatment, and achieves a good effect of removing hairiness, has a good anti-pilling effect, and improves production efficiency.

[0041] (2) The low-strength-loss and high-efficiency polishing composite enzyme of the present invention is used for one-bath treatment of cotton fabric polishing and dyeing, shortening the technological processes of polishing and dyeing, reducing one water discharge; during the soda ash fixation process, the increase in pH replaces high-temperature enzyme inactivation, reducing energy consumption, and at the same time, the dyeing depth is good without affecting the polishing and dyeing effect.

[0042] (3) The hairiness removal grade of the cotton fabric after polishing treatment prepared by the method of the present invention reaches 4.5 levels, the pilling grade reaches 4.5 levels, the strength loss rate is below 15%, and the weight loss rate is below 5%.

[0043] (4) The hairiness removal grade of the cotton fabric after polishing and dyeing treatment prepared by the method of the present invention reaches 4 levels, the pilling grade reaches 4 levels, the strength loss rate is below 16%, and the weight loss rate is below 5%. Description of the drawings

[0044] Figure 1 For the surface hairiness (A) of the cotton fabric after polishing treatment obtained in Example 3 and the hairiness filtration situation (B) of the polishing residual liquid.

[0045] Figure 2 For the surface hairiness situation (A) of the cotton fabric after water treatment obtained in Comparative Example 1 and the hairiness filtration situation (B) of the treatment residual liquid.

[0046] Figure 3 For the relative enzyme activity of neutral cellulase at different pH values in Example 5.

[0047] Figure 4 For the influence of different sodium lignosulfonates on the enzyme activity of neutral cellulase in Example 6.

[0048] Figure 5 For the enzyme activity retention situation of cellulase and the original enzyme incubated at 50 °C for different times with the addition of 5% galactose in Example 7.

[0049] Figure 6Retention of enzyme activity when different amounts of galactose in Example 7 were incubated at 50 °C for 1 h.

[0050] Figure 7 Effect of different types and concentrations of additives on the relative enzyme activity of neutral cellulase in Comparative Example 7.

[0051] Figure 8 Effect of different saccharide substances on the relative enzyme activity of neutral cellulase in Comparative Example 8. Detailed implementation manners

[0052] The following are descriptions of the preferred embodiments of the present invention. It should be understood that the embodiments are for better explaining the present invention and are not used to limit the present invention.

[0053] Testing methods:

[0054] 1. Testing of cellulase activity:

[0055] Determination was carried out with reference to the light industry standard QB 2583—2003 "Cellulase Preparation".

[0056] 2. Testing of hairiness removal:

[0057] Reference was made to the chemical industry standard HG / T 5853-2021 "Determination of the Polishing Effect of Cellulase for Textile Dyeing and Finishing Auxiliaries".

[0058] 3. Testing of pilling:

[0059] Reference was made to GB / T 4802.2-2008 "Determination of the Pilling Performance of Textiles" Part 2: Modified Martindale Method.

[0060] 4. Testing of the strength loss rate:

[0061] The bursting strength of the fabric was tested on a YGB026ET-250 electronic strength tester. Three parallel samples were taken for testing, and the average value was taken to calculate the strength loss rate of the fabric.

[0062] The specific calculation formula is as follows:

[0063] Strength loss rate (%) = (bursting strength of untreated cotton fabric - bursting strength of treated cotton fabric) / bursting strength of untreated cotton fabric × 100%.

[0064] 5. Testing of the weight loss rate:

[0065] Weight loss rate (%) = (mass of untreated cotton fabric - mass of treated cotton fabric) / mass of untreated cotton fabric × 100%. Raw materials used in the examples:

[0066] Cotton fabric: cotton knitted plain cloth, 180 g / m2 ;

[0067] Neutral cellulase: enzyme activity is 60 U / mL, purchased from Condien Biotechnology Co., Ltd.;

[0068] Galactose; the content of active substance is greater than 99.8%; biochemical reagent BR;

[0069] Sodium cyclamate: the content of active substance > 80%.

[0070] Example 1

[0071] A method for polishing cotton fabric based on a low-strength-loss and high-efficiency polishing composite enzyme, comprising the following steps:

[0072] (1) Mix neutral cellulase, sodium lignosulfonate and galactose evenly to obtain a low-strength-loss and high-efficiency polishing composite enzyme; wherein, the mass of sodium lignosulfonate is 4% of that of neutral cellulase; the mass of galactose is 5% of that of neutral cellulase;

[0073] (2) Add the low-strength-loss and high-efficiency polishing composite enzyme and sodium cyclamate to the phosphate buffer solution with a pH of 6 and mix evenly to obtain a polishing finishing solution; wherein, the dosage of the low-strength-loss and high-efficiency polishing composite enzyme is 1% o.w.f, and the concentration of sodium cyclamate in the buffer solution is 5 g / L;

[0074] (3) According to the bath ratio of 1:15, place the cotton fabric in the polishing finishing solution and carry out polishing finishing at 50 °C for 60 min to obtain the polished cotton fabric;

[0075] (4) Treat the polished cotton fabric in a 98 °C water bath for 10 min to inactivate the enzyme, and after that, wash it thoroughly with water and dry it to obtain the polished cotton fabric.

[0076] Example 2

[0077] Adjust the dosage of the low-strength-loss and high-efficiency polishing composite enzyme in step (2) of Example 1 to 0.5, 3, 5% o.w.f, and keep other conditions the same as those in Example 1 to obtain the polished cotton fabric.

[0078] Perform performance tests on the obtained polished cotton fabric, and the test results are shown in Table 1 below:

[0079] Table 1

[0080] Dosage (% o.w.f) Level of hairiness removal Pilling resistance level Strength loss rate / % Weight loss rate / % 0.5 3 3 9.23 1.64 1 (Example 1) 4.5 4.5 12.56 2.47 3 4.5 4 15.27 2.98 5 4.5 4.5 21.33 3.42

[0081] Example 3

[0082] Adjust the dosage of the low-strength-loss and high-efficiency polishing complex enzyme in step (2) of Example 1 to 3% o.w.f, and at the same time adjust the polishing finishing time in step (3) to 30 min. Keep the other conditions the same as in Example 1 to obtain the cotton fabric after polishing treatment.

[0083] Perform performance tests on the obtained polished cotton fabric. The test results are shown in Table 2 below:

[0084] Table 2

[0085] Example Level of hairiness removal Pilling resistance level Strength loss rate / % Weight loss rate / % 1 4.5 4.5 12.56 2.47 3 4 4 10.11 2.13

[0086] Comparative Example 1

[0087] Use water-treated cotton fabric without adding neutral cellulase, sodium lignosulfonate, galactose, and sodium cyclamate;

[0088] Specifically as follows:

[0089] According to a liquor ratio of 1:15, place the cotton fabric in a phosphate buffer solution with a pH of 6 and treat it at 50 °C for 60 min to obtain the finished cotton fabric;

[0090] Treat the finished cotton fabric in a water bath at 98 °C for 10 min, then wash it thoroughly with water and dry it to obtain the water-treated cotton fabric.

[0091] Perform performance tests on the treated cotton fabrics obtained in Example 3 and Comparative Example 1. The test results are as follows:

[0092] Figure 1 For the surface hairiness (A) of the polished cotton fabric obtained in Example 3 and the hairiness filtration situation of the polished residual liquor (B). Figure 2 For the surface hairiness situation (A) of the water-treated cotton fabric obtained in Comparative Example 1 and the hairiness filtration situation of the treatment residual liquor (B). Comparison Figure 1 and Figure 2 It can be seen that: compared with the water treatment process without adding cellulase, etc., the compounded cellulase can significantly improve the hairiness removal effect on the fabric surface. The length and quantity of the hairiness are significantly reduced, and the grade is improved to above level 4.

[0093] Example 4

[0094] Adjust the liquor ratio in step (3) of Example 1 to 1:10, and keep the other conditions the same as in Example 1 to obtain the cotton fabric after polishing treatment.

[0095] Perform performance tests on the obtained polished cotton fabric. The test results are shown in Table 3 below:

[0096] Table 3

[0097] Bath ratio Level of hairiness removal Pilling resistance level Strength loss rate / % Weight loss rate / % 1:15 (Example 1) 4.5 4.5 12.56 2.47 1：10 4.5 4 13.36 2.51

[0098] Example 5

[0099] Adjust the pH of the phosphate buffer in step (2) of Example 1 to 4, 5, 6 (Example 1), 7, 8, 9, 10, 11, and keep the others the same as in Example 1 to obtain the cotton fabric after polishing treatment. At the same time, measure the relative enzyme activity of neutral cellulase at different pH values.

[0100] Perform performance tests on the obtained polished cotton fabric, and the test results are shown in Table 4 below:

[0101] Table 4

[0102] pH Level of hairiness removal Pilling resistance level Strength loss rate / % Weight loss rate / % 6 (Example 1) 4.5 4.5 12.56 2.47 5 4.5 4 13.79 2.86

[0103] Figure 3 Is the relative enzyme activity of neutral cellulase at different pH values. The relative enzyme activity is calculated with the highest enzyme activity as the standard and other enzyme activities as variables after incubating for 1 h according to the enzyme activity test standard.

[0104] From Figure 3 It can be seen that when the pH of the phosphate buffer is 5 - 6, the relative enzyme activity of neutral cellulase is the highest.

[0105] Example 6

[0106] Adjust the mass of sodium lignosulfonate in step (1) of Example 1 to 2, 6% of neutral cellulase, and keep the others the same as in Example 1 to obtain the cotton fabric after polishing treatment.

[0107] Perform performance tests on the obtained polished cotton fabric, and the test results are shown in Table 5 below:

[0108] Table 5

[0109] Dosage (%) Level of hairiness removal Pilling resistance level Strength loss rate / % Weight loss rate / % 4 (Example 1) 4.5 4.5 12.56 2.47 2 4 4 8.46 2.21 6 4.5 4.5 14.85 2.62

[0110] Figure 4 Is the effect of different sodium lignosulfonates on the enzyme activity of neutral cellulase. From Figure 4 It can be seen that adding 4% sodium lignosulfonate can increase the cellulase activity by about twice, improve the hydrolysis efficiency of cellulase, greatly shorten the polishing treatment time, and improve the production efficiency.

[0111] Example 7

[0112] Adjust the dosage of galactose in step (1) of Example 1 to 0.5, 1, 2.5, 5 (Example 1), 10, 15%, and test the enzyme activity retention of cellulase at 50 °C for different incubation times.

[0113] The results are as Figure 5 and Figure 6 ;

[0114] Figure 5 The enzyme activity retention of cellulase and the original enzyme incubated at 50 °C for different times with the addition of 5% galactose. From Figure 5 It can be seen that the addition of galactose can improve the stability of cellulase activity.

[0115] Figure 6 The enzyme activity retention of different dosages of galactose incubated at 50 °C for 1 h. From Figure 6 It can be seen that when the amount of galactose is 5%, the stabilizing effect on the enzyme is the best.

[0116] Example 8

[0117] Adjust the dosage of sodium cyclamate in step (2) of Example 1 to 3, 8 g / L, and keep the others the same as in Example 1 to obtain the polished cotton fabric.

[0118] Perform performance tests on the obtained polished cotton fabric, and the test results are shown in Table 6 below:

[0119] Table 6

[0120] Dosage (g / L) Level of hairiness removal Pilling resistance level Strength loss rate / % Weight loss rate / % 5 (Example 1) 4.5 4.5 12.56 2.47 3 4.5 4.5 13.68 2.55 8 4.5 4.5 14.21 2.63

[0121] Comparative Example 2 Pure cellulase

[0122] Omit sodium cyclamate, sodium lignosulfonate, and galactose in Example 1, and keep the others the same as in Example 1 to obtain the polished cotton fabric.

[0123] Comparative Example 3 Sodium lignosulfonate

[0124] Omit sodium cyclamate and galactose in Example 1, and keep the others the same as in Example 1 to obtain the polished cotton fabric.

[0125] Comparative Example 4 Sodium lignosulfonate + galactose

[0126] Omit sodium cyclamate in Example 1, and keep the others the same as in Example 1 to obtain the polished cotton fabric.

[0127] Comparative Example 5 Sodium cyclamate + galactose

[0128] Omit sodium lignosulfonate in Example 1, and keep the others the same as in Example 1 to obtain the polished cotton fabric.

[0129] Comparative Example 6 Sodium lignosulfonate + sodium cyclamate

[0130] Omit galactose in Example 1, and keep the others the same as in Example 1 to obtain the polished cotton fabric.

[0131] The obtained polished cotton fabric was subjected to performance tests, and the test results are shown in Table 7 below:

[0132] Table 7

[0133] Example Level of hairiness removal Pilling resistance level Strength loss rate / % Weight loss rate / % Example 1 4.5 4.5 12.56 2.47 Comparative Example 2 2 1.5 16.52 0.95 Comparative Example 3 4 4 23.37 2.03 Comparative Example 4 4 4 21.19 2.12 Comparative Example 5 2 2 13.21 1.26 Comparative Example 6 4 3.5 15.35 2.33

[0134] Comparative Example 7

[0135] Sodium lignosulfonate in Example 1 was adjusted to Tween 80, sorbitol, 1,3 - propanediol, and Span 80, and at the same time, the concentrations were adjusted to 2%, 4%, 6%, 8%, and 10%; the others were kept the same as in Example 1, and the relative enzyme activity of neutral cellulase was measured.

[0136] The results are as Figure 7 From Figure 7 it can be seen that: adding different types and concentrations of additives to cellulase, most types of additives have no effect on the activity of cellulase, and some additives will reduce the enzyme activity, thus affecting the hydrolysis efficiency of the enzyme. Among them, sodium lignosulfonate has the best promoting effect on enzyme activity, and can double the enzyme activity at an addition amount of 4%, thus improving the effect of cellulase in the polishing process.

[0137] Comparative Example 8

[0138] Galactose in Example 1 was adjusted to glucose, sucrose, and maltose, and the others were kept the same as in Example 1, and the relative enzyme activity of neutral cellulase was measured.

[0139] The results are as Figure 8 From Figure 8 it can be seen that: some saccharide substances will affect the stability of cellulase. Among them, after galactose is compounded with cellulase and incubated for a period of time, the residual enzyme activity is higher compared with the original cellulase, which can avoid the adverse effect of the decrease in enzyme activity caused by mechanical rotation and other factors during the polishing process, resulting in a reduction in the polishing effect.

[0140] Example 9

[0141] A one - bath method for polishing and dyeing cotton fabric, the method uses a low - strength - loss and high - efficiency polishing composite enzyme; the method comprises the following steps:

[0142] (1) Mix neutral cellulase, sodium lignosulfonate, and galactose evenly to obtain a low - strength - loss and high - efficiency polishing composite enzyme; wherein, the mass of sodium lignosulfonate is 4% of that of neutral cellulase; the mass of galactose is 5% of that of neutral cellulase;

[0143] (2) Add a low-intensity-loss and high-efficiency polishing complex enzyme and sodium cyclamate to the phosphate buffer solution with a pH of 6 and mix evenly to obtain a polishing finishing solution; among them, the dosage of the low-intensity-loss and high-efficiency polishing complex enzyme is 1% o.w.f, and the concentration of sodium cyclamate in the buffer solution is 5 g / L;

[0144] (3) Add reactive brilliant red K2G and a part of sodium sulfate to the polishing finishing solution to obtain a dyeing and polishing one-bath finishing solution; among them, the dosage of the reactive dye is 2% o.w.f; the concentration of sodium sulfate in the polishing finishing solution is 30 g / L, and half of the total dosage is added here:

[0145] (4) According to a bath ratio of 1:15, place the cotton fabric in the dyeing and polishing one-bath finishing solution, carry out polishing finishing at 55 °C for 30 min, and then add the remaining sodium sulfate to make the total concentration of the sodium sulfate added twice 60 g / L, and carry out polishing finishing at 55 °C for 30 min; add soda ash with a concentration of 20 g / L, and carry out polishing finishing at 55 °C for 30 min to obtain the cotton fabric after polishing and dyeing finishing;

[0146] (5) Wash the cotton fabric after polishing and dyeing finishing with cold water to remove the floating color, carry out soaping at 98 °C for 10 min, and dry it after cold water washing; obtain the cotton fabric after polishing and dyeing treatment.

[0147] Example 10

[0148] Adjust the concentration of sodium sulfate in the polishing finishing solution in step (3) of Example 9 to 20 g / L. After adding the remaining sodium sulfate in step (4), make the total concentration of the sodium sulfate added twice 40 g / L, and keep the others the same as in Example 9 to obtain the cotton fabric after polishing and dyeing treatment.

[0149] Comparative Example 9

[0150] Add a reactive dye and sodium sulfate to the polishing finishing solution in Comparative Example 2, and keep the others the same as in Example 9 to obtain the cotton fabric after polishing and dyeing treatment.

[0151] Carry out performance testing on the cotton fabric after polishing and dyeing treatment, and the test results are shown in Table 8 below:

[0152] Table 8

[0153] Level of hairiness removal Pilling resistance level Strength loss / % Weight loss rate / % K / S Example 9 4 4 16.27 2.02 3.231 Example 10 4 4 15.83 1.97 2.883 Comparative Example 9 1.5 1 3.01 0.65 3.352

[0154] It can be seen from Table 8 that when the cellulose enzyme is used for one-bath polishing and dyeing, the polishing effect will not decline due to the addition of the dye and sodium sulfate, and at the same time, the dyeing effect will not be affected by the cellulose enzyme polishing process. Adding the cellulose enzyme during the dyeing process has a good promoting effect on the surface smoothness of the fabric, and the pilling grade also improves.

[0155] Although the present invention has been disclosed above in its preferred embodiments, it is not intended to limit the present invention. Any person skilled in this technology can make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be defined by the claims.

Claims

1. A finishing liquid for cotton fabrics, characterized in that, The finishing solution described above comprises a low-strength-loss and high-efficiency polishing complex enzyme and sodium cyclamate. The low-strength-loss and high-efficiency polishing complex enzyme is a mixture of cellulase, sodium lignosulfonate and galactose. Among them, the mass of sodium lignosulfonate is 2-6% of that of cellulase; the mass of galactose is 3-10% of that of cellulase.

2. A method for preparing the finishing liquid according to claim 1, characterized in that, It includes the following steps: Mix cellulase, sodium lignosulfonate and galactose evenly to obtain the low-strength-loss and high-efficiency polishing complex enzyme, and then mix the low-strength-loss and high-efficiency polishing complex enzyme, sodium cyclamate and buffer solution evenly to obtain the polishing finishing solution.

3. A method for polishing cotton fabrics with the finishing liquid according to claim 1, characterized in that, It includes the following steps: Mix the low-strength-loss and high-efficiency polishing complex enzyme, sodium cyclamate and buffer solution evenly to obtain the polishing finishing solution; then place the cotton fabric in the polishing finishing solution for polishing finishing; after polishing finishing, inactivate the enzyme, wash with water, and dry to obtain the polished cotton fabric.

4. The method according to claim 3, wherein The dosage of the low-strength-loss and high-efficiency polishing complex enzyme described above is 1% o.w.f - 3% o.w.f.

5. The method according to claim 3, characterized in that, The buffer solution is a phosphate buffer solution with a pH of 5-6.

6. The method according to claim 3, characterized in that The concentration of sodium cyclamate in the buffer solution is 3-8 g / L.

7. The method according to claim 3, characterized in that, The polishing finishing is carried out at 45-55 °C for 30-60 min.

8. The method according to claim 3, characterized in that, The bath ratio of the polishing finishing is 1:10-15.

9. A method for one-bath polishing and dyeing of cotton fabrics, characterized in that, The method described above uses the finishing solution described in claim 1.

10. The method according to claim 9, wherein The method described above includes the following steps: Mix the low-strength-loss and high-efficiency polishing complex enzyme, sodium cyclamate and buffer solution evenly to obtain the polishing finishing solution; then add reactive dyes and sodium sulfate to the polishing finishing solution to obtain a dyeing and polishing one-bath finishing solution; then place the cotton fabric in the dyeing and polishing one-bath finishing solution for polishing and dyeing finishing, add sodium sulfate to continue the finishing, and add a fixing agent to continue the finishing; after polishing and dyeing finishing, wash with water, wash with soap, and dry to obtain the polished and dyed cotton fabric.

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