Method for improving whitening and abrasion of deep-color fabric containing cellulose fibers and deep-color ready-made clothes after washing, and deep-color fabric and deep-color ready-made clothes

Abstract

The invention provides a method for improving whitening and abrasion of a deep-color fabric containing cellulose fibers and a deep-color ready-made garment after washing, the deep-color fabric and the deep-color ready-made garment. The method comprises the steps that first finishing liquid is applied to the deep-color fabric or the deep-color garment containing cellulose fibers, the first finishing liquid contains a resin cross-linking agent, and the operation of applying the first finishing liquid is carried out in a foaming or padding mode; baking the deep-color fabric or the ready-made garment applied with the first finishing liquid for the first time; padding the dark-color fabric or the ready-made garment which is baked for the first time in a second finishing liquid; and baking the dark fabric or the garment padded with the second finishing liquid for the second time to finish the method. The second finishing liquid comprises a cellulosic fiber protective agent, a cross-linking agent and a softening agent. The invention also provides the dark fabric and the dark garment prepared by the method.

Description

Technical Field

[0001] The invention relates to a method for improving the whitening and wear of dark fabrics and dark ready-made clothes containing cellulose fibers after washing, and the dark fabrics and dark ready-made clothes, belonging to the technical field of textile printing and dyeing. Background Art

[0002] During multiple washes, dark-colored (such as military blue and black) clothing fabrics containing cellulose fibers are prone to whitening / wear on the body and seams due to the friction of the washing machine wall, which makes the garment look worn, affecting the overall appearance of the textiles and the grade of the dark cotton fabrics.

[0003] To address the above issues, the industry currently usually adopts resin finishing methods, or resin finishing combined with enzyme washing or singeing; resin finishing improves the color washability and wrinkle resistance of knitted fabrics by cross-linking resin and cellulose into a film. This improvement is effective for medium and light colors, but for dark-colored fabrics, a very high amount of resin is required to improve the whitening phenomenon after washing. However, as the amount of resin increases, the strength of the fabric decreases significantly. Therefore, it is difficult to take into account both fabric strength and color washability by using resin alone. Summary of the invention

[0004] In order to solve the above technical problems, the purpose of the present invention is to provide a method for improving the whitening and wear of dark fabrics containing cellulose fibers and dark garments after washing. The method can effectively improve the whitening and wear of the seams, as well as the fading of the shirt body after washing.

[0005] To achieve the above object, the present invention provides a method for improving the whitening and wear of dark fabrics and dark clothes containing cellulose fibers after washing, which comprises the following steps:

[0006] Step 1, applying a first finishing liquid to dark fabrics or dark garments containing cellulose fibers, wherein the first finishing liquid contains a resin cross-linking agent, and the operation of applying the first finishing liquid is performed by foaming or padding;

[0007] Step 2, performing a first baking on the dark fabric or dark garment to which the first finishing liquid is applied;

[0008] Step 3, dipping the dark fabric or dark garment that has been baked for the first time with a second finishing liquid;

[0009] Step 4, baking the dark fabric or dark garment dipped in the second finishing liquid for a second time to complete the method;

[0010] Wherein, based on the total volume of the first finishing liquid, the content of the resin cross-linking agent in the first finishing liquid is 50-500 g / L;

[0011] Based on the total volume of the second finishing liquid, the second finishing liquid comprises the following components: 30 - 250 g / L of cellulose fiber protectant, 10 - 50 g / L of crosslinking agent, 30 - 150 g / L of softener, and the balance is water.

[0012] In the above method, preferably, when the first step adopts the foaming method, based on the total volume of the first finishing liquid, the first finishing liquid comprises the following components: 100 - 500 g / L of resin crosslinking agent, 20 - 100 g / L of catalyst, 1 - 9 g / L of foaming agent, and the balance is water.

[0013] In the above method, preferably, when the first step adopts the padding method, based on the total volume of the first finishing liquid, the first finishing liquid comprises the following components: 30 - 150 g / L of softener, 50 - 250 g / L of resin crosslinking agent, 5 - 50 g / L of catalyst, 0 - 5 g / L of penetrant, and the rest is water.

[0014] In the above method, preferably, when the first step adopts the foaming method, the foaming ratio of the foaming is 1:5 - 1:25, and the foam application amount is 15 - 50%. More preferably, the foaming is carried out on the front side of the dark - colored fabric or dark - colored ready - made garment containing cellulose fibers. By applying the resin crosslinking agent finishing liquid in a foam manner on one side, more resin can be distributed on the surface of the fabric and ready - made garment, which can effectively improve the fiber strength loss caused by resin finishing.

[0015] In the above method, preferably, when the first step adopts the padding method, the liquor pickup rate of the padding is 50 - 100%.

[0016] In the above method, preferably, in the second step, when padding the second finishing liquid, the liquor pickup rate of the padding is 50 - 100%.

[0017] In the above method, preferably, the temperature of the first baking is 100 - 180 °C, and the baking speed is 5 - 30 m / min. The first baking can be carried out on a stentering machine.

[0018] In the above method, preferably, the temperature of the second baking is 130 - 180 °C, and the baking speed is 5 - 20 m / min. The second baking can be carried out on a stentering machine.

[0019] In the above method, preferably, in the first finishing liquid, the softener is one or a combination of two or more of polyethylene - type softeners, polyurethane - type softeners, fatty acid derivative - type softeners, and silicone oil - type softeners; the catalyst is MgCl2 and / or Na2SO4; the penetrant is fatty alcohol polyoxyethylene ether.

[0020] In the above method, preferably, in the second finishing liquid, the cellulose fiber protective agent is high-density polyethylene and / or polyurethane; more preferably, the number average molecular weight of the high-density polyethylene is 2000-5000; the number average molecular weight of the polyurethane is 10000-50000.

[0021] In the above method, preferably, in the second finishing liquid, the cross-linking agent is isocyanate and / or polyurethane.

[0022] In the above method, preferably, the cellulose fiber includes natural fiber and / or regenerated cellulose fiber; more preferably, the natural fiber includes cotton fiber and / or hemp fiber; the regenerated cellulose fiber includes one or a combination of two or more of viscose fiber, modal fiber, lyocell fiber, etc.

[0023] In the above method, preferably, the color of the dark fabric or dark garment is a color with a dye concentration ≥ 2% owf.

[0024] In the above method, by applying the first finishing liquid and performing the first baking, the resin can diffuse into the amorphous area of ​​the fiber. Under the action of the catalyst, the resin can undergo a cross-linking reaction with the cellulose fiber to form a stable network structure inside the fiber, thereby reducing the movement and sliding between the fiber macromolecules, making it less likely to undergo large displacements under water swelling, thereby reducing fiber fibrillation.

[0025] By impregnating the second finishing liquid and baking for the second time, the cellulose fiber protective agent and the cross-linking agent are cross-linked with the cellulose fiber. After high-temperature setting, a flexible and smooth film can be formed on the fiber surface, which effectively improves the strength of the fabric and the wear resistance during washing, while preventing the dye from hydrolyzing and falling off.

[0026] The invention also provides a dark-colored fabric, which is obtained by processing the method.

[0027] The invention also provides a dark-colored garment, which is obtained by processing the method.

[0028] The method provided by the present invention combines resin finishing with wear-resistant finishing and adopts a two-step process, so that the resin cross-linking agent forms cross-links between the original fibrils and micro-fibrils inside the fiber, and the wear-resistant finishing agent forms a film on the fiber surface through cross-linking, thereby forming a synergistic effect, which greatly improves the whitening and wear phenomenon of dark cotton fabrics and dark clothes after washing caused by friction and dye falling during the washing process, and also improves the wear resistance of fabrics and clothes.

[0029] After multiple washings, the whitening and wear of the seams of the dark-colored fabrics and dark-colored ready-made clothes treated according to the method of the present invention are effectively improved, and the fading phenomenon of the clothes after washing is also significantly improved. Brief Description of the Drawings

[0030] Figure 1 Scanning electron microscope photograph of the fabric obtained in Example 1

[0031] Figure 2 Scanning electron microscope photograph of the fabric obtained in Comparative Example 1

[0032] Figure 3 Scanning electron microscope photograph of the fabric obtained in Example 1 after 5 washes

[0033] Figure 4 Scanning electron microscope photograph of the fabric obtained in Comparative Example 5 after 5 washes Detailed Description of the Invention

[0034] For a clearer understanding of the technical features, objectives, and beneficial effects of the present invention, the technical solutions of the present invention are hereinafter described in detail, but it should not be construed as a limitation on the scope of implementation of the present invention

[0035] Example 1

[0036] This example provides a method for improving the whitening and wear of dark-colored fabrics and ready-made garments containing cellulose fibers after washing. The fabric used is 40S×2 pure cotton single-sided pique fabric, and the method includes the following steps

[0037] 1) Pretreatment: Boil, dye, and subject the knitted fabric to biological enzyme treatment to obtain the dyed fabric

[0038] The reagents, their dosages, and process parameters of the boiling process are shown in Table 1

[0039] Table 1

[0040]

[0041] The CIarite bleaching agent is CIarite One from Huntsman

[0042] The reagents, their dosages, and process parameters of the enzyme washing process are shown in Table 2

[0043] Table 2

[0044]

[0045] Cellusoft L is a cellulose enzyme produced by Novozymes

[0046] The reagents, their dosages, and process parameters of the dyeing process are shown in Table 3

[0047] Table 3

[0048]

[0049] 2) Immerse the above knitted fabric in a first finishing solution (the raw material composition of this finishing solution is shown in Table 4, the solvent is water, and the content of each component is based on the total volume of the finishing solution), and the liquor pickup rate is 80%;

[0050] Table 4

[0051]

[0052]

[0053] 3) Bake the fabric after applying the first finishing solution. The baking temperature is 150 °C and the baking speed is 15 m / min;

[0054] 4) Immerse the baked fabric in a second finishing solution (the raw material composition of this finishing solution is shown in Table 5, the solvent is water, and the content of each component is based on the total volume of the finishing solution), and the impregnation liquor retention rate is 80%;

[0055] Table 5

[0056] Components name Dosage Manufacturer softener JSS 50g / L Momentive Chemical Fiber Protective Agent NI 100g / L Kekai Fine Chemical Co., Ltd. Crosslinking agent FBI 30g / L Archroma Chemicals Ltd.

[0057] 5) Bake the fabric after applying the second finishing solution. The baking temperature is 150 °C and the baking speed is 15 m / min, then the knitted fabric that is not prone to turning white after washing is obtained; The scanning electron microscope photos are as Figure 1 shown;

[0058] Make the fabric into a POLO shirt, then the knitted ready-to-wear that is not prone to turning white after washing is obtained.

[0059] Conduct relevant tests on the fabric products of this example. The test methods and test results are shown in Table 6.

[0060] Table 6

[0061]

[0062] Example 2

[0063] This example provides a method for improving the whitening and wear of dark-colored fabrics and ready-to-wears containing cellulose fibers. The fabric used is 40S×2 pure cotton single-sided pique fabric. This method includes the following steps:

[0064] 1) Pretreatment: Boil, dye, and biologically enzyme-treat the knitted fabric to obtain the dyed fabric;

[0065] 2) Prepare a resin crosslinking agent foaming solution as the first finishing solution. Based on the total volume of the finishing solution, the component composition of the resin crosslinking agent foaming solution is shown in Table 7;

[0066] Table 7

[0067]

[0068]

[0069] The dyed fabric is subjected to foam finishing, where the foaming ratio is 1:11, the foam application amount is 35%, the vehicle speed is 18 m / min, and the mixing rotation speed is 450 m / min;

[0070] 3) Bake the fabric after applying the first finishing liquid at a baking temperature of 150 °C and a baking vehicle speed of 18 m / min;

[0071] 4) Pad the baked fabric with a second finishing liquid (the raw material composition of this finishing liquid is shown in Table 8, the solvent is water, and the content of each component is based on the total volume of the finishing liquid), and the padding liquor pickup is 80%;

[0072] Table 8

[0073] Components name Dosage Manufacturer softener JSS 50g / L Momentive Chemical Fiber Protective Agent NI 100g / L Kekai Fine Chemical Co., Ltd. Crosslinking agent FBI 30g / L Archroma Chemicals Ltd.

[0074] 5) Bake the fabric after applying the second finishing liquid at a baking temperature of 150 °C and a baking vehicle speed of 15 m / min, and then the knitted fabric that is not prone to turning white after washing is obtained;

[0075] The fabric is made into a POLO shirt to obtain a knitted garment that is not prone to turning white after washing.

[0076] Carry out relevant tests on the fabric finished product of this example, and the test methods and test results are shown in Table 9.

[0077] Table 9

[0078]

[0079] Example 3

[0080] This example provides a method for improving the whitening and wear of dark-colored fabrics and ready-made garments containing cellulose fibers. The fabric used is 60s / 2 pure cotton single jersey fabric, and this method includes the following steps:

[0081] 1) Pretreatment: Boil, dye, and biologically enzyme-treat the knitted fabric to obtain the dyed fabric;

[0082] 2) Pad the above-mentioned knitted fabric with a first finishing liquid (the raw material composition of this finishing liquid is shown in Table 10, the solvent is water, and the content of each component is based on the total volume of the finishing liquid), and the liquor pickup is 80%;

[0083] Table 10

[0084] Components name Dosage Manufacturer softener JSS 50g / L Momentive Chemical Modified resin crosslinker ELF 100g / L Archroma Chemicals Ltd. catalyst <![CDATA[MgCl2]]> 10g / L Guangzhou Fuzhao Trading Co., Ltd. Penetrant JFC 1g / L Dongguan Jiahong Silicone Technology Co., Ltd.

[0085] 3) Bake the fabric after applying the first finishing solution at a baking temperature of 150 °C and a baking speed of 18 m / min;

[0086] 4) Pad the baked fabric with a second finishing solution (the raw material composition of this finishing solution is shown in Table 11, the solvent is water, and the content of each component is based on the total volume of the finishing solution), and the padding liquor pickup is 80%;

[0087] Table 11

[0088] Components name Dosage Manufacturer softener JSS 50g / L Momentive Chemical Fiber Protective Agent NI 80g / L Kekai Fine Chemical Co., Ltd. Crosslinking agent FBI 20g / L Archroma Chemicals Ltd.

[0089] 5) Bake the fabric after applying the second finishing solution at a baking temperature of 150 °C and a baking speed of 18 m / min, and then the knitted fabric that is not prone to turning white after washing can be obtained.

[0090] Make the fabric into ready-to-wear clothes, and then the knitted ready-to-wear clothes that are not prone to turning white after washing can be obtained.

[0091] Conduct relevant tests on the fabric products of this example, and the test methods and test results are shown in Table 12.

[0092] Table 12

[0093]

[0094] Example 4

[0095] This example provides a method for improving the whitening and wear of dark-colored fabrics and ready-to-wear clothes containing cellulose fibers. The fabric used is 50s / 1 pure cotton double-sided cloth, and this method includes the following steps:

[0096] 1) Pretreatment: Scour, dye, and biochemically treat the knitted fabric to obtain the dyed fabric;

[0097] 2) Pad the above-mentioned knitted fabric with a first finishing solution (the raw material composition of this finishing solution is shown in Table 13, the solvent is water, and the content of each component is based on the total volume of the finishing solution), and the liquor pickup is 80%;

[0098] Table 13

[0099] Components name Dosage Manufacturer softener JSS 50g / L Momentive Chemical Modified resin crosslinker ELF 120g / L Archroma Chemicals Ltd. catalyst <![CDATA[MgCl2]]> 12g / L Guangzhou Fuzhao Trading Co., Ltd. Penetrant JFC 1g / L Dongguan Jiahong Silicone Technology Co., Ltd.

[0100] 3) Bake the fabric after applying the first finishing solution at a baking temperature of 150 °C and a baking speed of 18 m / min;

[0101] 4) Pad the baked fabric with a second finishing solution (the raw material composition of this finishing solution is shown in Table 14, the solvent is water, and the content of each component is based on the total volume of the finishing solution), and the padding liquor pickup is 80%;

[0102] Table 14

[0103] Components name Dosage Manufacturer softener JSS 50g / L Momentive Chemical Fiber Protective Agent NI 120g / L Kekai Fine Chemical Co., Ltd. Crosslinking agent FBI 40g / L Archroma Chemicals Ltd.

[0104] 5) Bake the fabric after applying the second finishing liquid at a baking temperature of 150 °C and a baking speed of 18 m / min to obtain a knitted fabric that does not easily turn white after washing;

[0105] Make the fabric into a POLO shirt to obtain a knitted garment that does not easily turn white after washing.

[0106] Conduct relevant tests on the fabric products of this example. The test methods and test results are shown in Table 15.

[0107] Table 15

[0108]

[0109] Example 5

[0110] This example provides a method for improving the whitening and wear of dark-colored fabrics and garments containing cellulose fibers. The fabric used is a double-sided fabric woven with 40s Model compact spun yarn on the front and 30D / 12F polyester on the back, and the fabric weight is 290 g / m 2 , and the method includes the following steps:

[0111] 1) Pretreatment: Boil, dye, and biologically enzyme-treat the knitted fabric to obtain the dyed fabric;

[0112] 2) Pad the above knitted fabric with the first finishing liquid (the raw material composition of this finishing liquid is shown in Table 16, the solvent is water, and the content of each component is based on the total volume of the finishing liquid), and the padding rate is 80%;

[0113] Table 16

[0114] Components name Dosage Manufacturer softener JSS 50g / L Momentive Chemical Modified resin crosslinker ELF 120g / L Archroma Chemicals Ltd. catalyst <![CDATA[MgCl2]]> 12g / L Guangzhou Fuzhao Trading Co., Ltd. Penetrant JFC 1g / L Dongguan Jiahong Silicone Technology Co., Ltd.

[0115] 3) Bake the fabric after applying the first finishing liquid at a baking temperature of 150 °C and a baking speed of 18 m / min;

[0116] 4) Pad the baked fabric with the second finishing liquid (the raw material composition of this finishing liquid is shown in Table 17, the solvent is water, and the content of each component is based on the total volume of the finishing liquid), and the padding pick-up rate is 80%;

[0117] Table 17

[0118] Components name Dosage Manufacturer softener JSS 50g / L Momentive Chemical Fiber Protective Agent NI 120g / L Kekai Fine Chemical Co., Ltd. Crosslinking agent FBI 40g / L Archroma Chemicals Ltd.

[0119] 5) Bake the fabric after applying the first finishing liquid at a baking temperature of 150 °C and a baking speed of 18 m / min to obtain a knitted fabric that does not easily turn white after washing;

[0120] Making one side of Model as the front side into a hooded sweatshirt style results in a knitted finished garment that is not prone to turning white after washing.

[0121] The fabric finished product of this embodiment was subjected to relevant tests, and the test methods and results are shown in Table 18.

[0122] Table 18

[0123]

[0124] Comparative Example 1

[0125] This comparative example used the same 40S×2 pure cotton single-sided piqué fabric blank as in Example 1 and was prepared according to the following preparation method:

[0126] 1) Pretreatment: The knitted fabric was scoured, dyed, and treated with bio-enzyme to obtain the dyed fabric (the same as in Example 1);

[0127] 2) The above-mentioned knitted fabric was padded with the following finishing liquor (the raw material composition of this finishing liquor is shown in Table 19, the solvent is water, and the content of each component is based on the total volume of the finishing liquor), and the padding pick-up rate was 80%;

[0128] Table 19

[0129] Components name Dosage Manufacturer softener JSS 50g / L Momentive Chemical Modified resin crosslinker ELF 80g / L Archroma Chemicals Ltd. catalyst <![CDATA[MgCl2]]> 8g / L Guangzhou Fuzhao Trading Co., Ltd. Penetrant JFC 1g / L Dongguan Jiahong Silicone Technology Co., Ltd.

[0130] 3) The fabric after applying the finishing liquor was baked at a baking temperature of 150 °C and a baking speed of 15 m / min to obtain the finished knitted fabric; the scanning electron microscope photos are as Figure 2 shown;

[0131] The fabric was made into a POLO shirt, which is the finished knitted garment.

[0132] Comparative Example 2

[0133] This comparative example used the same 40S×2 pure cotton single-sided piqué fabric blank as in Example 1 and was prepared according to the following preparation method:

[0134] 1) Pretreatment: The knitted fabric was scoured, dyed, and treated with bio-enzyme to obtain the dyed fabric (the same as in Example 1);

[0135] 2) The above-mentioned knitted fabric was padded with the following finishing liquor (the raw material composition of this finishing liquor is shown in Table 20, the solvent is water, and the content of each component is based on the total volume of the finishing liquor), and the padding wet pick-up rate was 80%.

[0136] Table 20

[0137] Components name Dosage Manufacturer softener JSS 50g / L Momentive Chemical Fiber Protective Agent NI 100g / L Kekai Fine Chemical Co., Ltd. Crosslinking agent FBI 30g / L Archroma Chemicals Ltd.

[0138] 5) Bake the fabric after applying the finishing liquid at a baking temperature of 150 °C and a baking speed of 15 m / min to obtain the finished knitted fabric;

[0139] Make the fabric into a POLO shirt, which is the finished knitted garment.

[0140] Comparative Example 3

[0141] This comparative example uses the same 40S×2 pure cotton single-sided pique fabric blank as in Example 1 and is prepared according to the following preparation method:

[0142] 1) Pretreatment: Scour, dye, and treat the knitted fabric with bio-enzyme to obtain the dyed fabric (same as in Example 1);

[0143] 2) Pad the above knitted fabric with the following finishing liquid (the raw material composition of this finishing liquid is shown in Table 21, the solvent is water, and the content of each component is based on the total volume of the finishing liquid), and the liquor pickup rate is 80%;

[0144] Table 21

[0145] Components name Dosage Manufacturer softener JSS 100g / L Momentive Chemical Modified resin crosslinker ELF 80g / L Archroma Chemicals Ltd. catalyst <![CDATA[MgCl2]]> 8g / L Guangzhou Fuzhao Trading Co., Ltd. Penetrant JFC 1g / L Dongguan Jiahong Silicone Technology Co., Ltd. Fiber Protective Agent NI 100g / L Kekai Fine Chemical Co., Ltd. Crosslinking agent FBI 30g / L Archroma Chemicals Ltd.

[0146] 3) Bake the fabric after applying the finishing liquid at a baking temperature of 150 °C and a baking speed of 15 m / min to obtain the finished knitted fabric;

[0147] Make the fabric into a POLO shirt, which is the finished knitted garment.

[0148] Comparative Example 4

[0149] This comparative example uses the same 40S×2 pure cotton single-sided pique fabric blank as in Example 1 and is prepared according to the following preparation method:

[0150] 1) Pretreatment: Scour, dye, and treat the knitted fabric with bio-enzyme to obtain the dyed fabric (same as in Example 1);

[0151] 2) Pad the above knitted fabric with the first finishing liquid (the raw material composition of this finishing liquid is shown in Table 22, the solvent is water, and the content of each component is based on the total volume of the finishing liquid), and the liquor pickup rate is 80%;

[0152] Table 22

[0153] Components name Dosage Manufacturer softener JSS 50g / L Momentive Chemical Fiber Protective Agent NI 100g / L Kekai Fine Chemical Co., Ltd. Crosslinking agent FBI 30g / L Archroma Chemicals Ltd.

[0154] 3) Bake the fabric after applying the first finishing liquid at a baking temperature of 150 °C and a baking speed of 15 m / min;

[0155] 4) Immerse the baked fabric in the second finishing solution (the raw material composition of this finishing solution is shown in Table 23, the solvent is water, and the content of each component is calculated based on the total volume of the finishing solution), and the impregnation liquor pickup is 80%;

[0156] Table 23

[0157] Components name Dosage Manufacturer softener JSS 50g / L Momentive Chemical Modified resin crosslinker ELF 80 g / L Archroma Chemical Co., Ltd. Catalyst <![CDATA[MgCl2]]> 8 g / L Guangzhou Fuzhao Trading Co., Ltd. Penetrant JFC 1 g / L Dongguan Jiahong Organosilicon Technology Co., Ltd.

[0158] 5) Bake the fabric after applying the finishing solution at a baking temperature of 150 °C and a baking speed of 15 m / min to obtain the finished knitted fabric;

[0159] Make the fabric into a POLO shirt, which is the finished knitted garment.

[0160] Comparative Example 5

[0161] This comparative example uses the same 40S×2 pure cotton single-sided pique fabric blank as in Example 1 and is prepared according to the following preparation method:

[0162] 1) Pretreatment: Scour, dye, and bi-enzyme treat the knitted fabric to obtain the dyed fabric (the same as in Example 1);

[0163] 2) Immerse the above-mentioned knitted fabric in the following finishing solution (the raw material composition of this finishing solution is shown in Table 24, the solvent is water, and the content of each component is calculated based on the total volume of the finishing solution), and the liquor pickup is 80%;

[0164] Table 24

[0165] Component Name Dosage Manufacturer Softener JSS 50 g / L Momentive Chemical Penetrant JFC 1 g / L Dongguan Jiahong Organosilicon Technology Co., Ltd.

[0166] 3) Dry the fabric after applying the finishing solution at a drying temperature of 150 °C and a drying speed of 20 m / min to obtain the finished knitted fabric;

[0167] Make the fabric into a POLO shirt, which is the finished knitted garment.

[0168] Conduct relevant tests on the fabric products of Example 1, Comparative Example 1, Comparative Example 2, Comparative Example 3, Comparative Example 4, and Comparative Example 5. The test methods and test results are shown in Table 25.

[0169] Table 25

[0170]

[0171]

[0172] As can be seen from the test results in Table 25: Compared with Comparative Example 1 where only the finishing liquid containing the resin crosslinking agent was padded, Comparative Example 2 where only the finishing liquid containing the fiber protector was padded, Comparative Example 3 where the resin crosslinking agent and the fiber protector were added together to the same finishing liquid, Comparative Example 4 where the finishing liquid containing the fiber protector was added first and then the finishing liquid containing the resin crosslinking agent, and Comparative Example 5 where no resin crosslinking agent and fiber protector were added and only softener was added, the color change before and after washing, the whitening and wear phenomena at the front ironing and other bone positions of Example 1 are better than those of the comparative examples.

[0173] The scanning electron microscope photos of the fabrics obtained in Example 1 and Comparative Example 1 are respectively as Figure 1 and Figure 2 shown. From Figure 1 and Figure 2 it can be seen that: After padding the second finishing liquid and performing the second curing, a flexible and smooth film was formed on the fiber surface of Example 1. In Comparative Example 1, the second finishing liquid was not padded and the second curing was not performed, and no such film was formed on the fiber surface; this film can effectively improve the strength of the fabric and its abrasion resistance during the washing process, and at the same time prevent the hydrolysis and dropping of dyes;

[0174] The scanning electron microscope photos of the fabrics obtained in Example 1 and Comparative Example 5 after 5 washes are respectively as Figure 3 and Figure 4 shown. From Figure 3 , Figure 4 it can be seen that: The fabric of Comparative Example 5 was not treated with the resin finishing liquid, and after 5 washes, the wear and fibrillation on the fiber surface were very serious; the fabric of Example 1 was treated with the resin finishing liquid, and after 5 washes, the wear and fibrillation on the fiber surface were greatly improved compared with the fabric of Comparative Example 5.

Claims

1. A method for improving the whitening and wear of dark fabrics and dark garments containing cellulose fibers after washing, comprising the following steps: Step 1, applying a first finishing liquid to dark fabrics or dark garments containing cellulose fibers, wherein the first finishing liquid contains a resin cross-linking agent, and the operation of applying the first finishing liquid is performed by foaming or padding; Step 2, baking the dark fabric or dark garment to which the first finishing liquid is applied for the first time; Step 3, dipping the dark fabric or dark garment that has been baked for the first time with a second finishing liquid; Step 4, baking the dark fabric or dark garment dipped in the second finishing liquid for a second time to complete the method; Wherein, based on the total volume of the first finishing liquid, the content of the resin cross-linking agent in the first finishing liquid is 50-500 g / L; Based on the total volume of the second finishing liquid, the second finishing liquid comprises the following components: 30-250 g / L of cellulose fiber protective agent, 10-50 g / L of cross-linking agent, 30-150 g / L of softening agent, and the balance is water.

2. The method according to claim 1, wherein: When the step 1 adopts a foaming method, the first finishing liquid comprises the following components based on the total volume of the first finishing liquid: 100-500 g / L of a resin cross-linking agent, 20-100 g / L of a catalyst, 1-9 g / L of a foaming agent, and the balance is water; When the step 1 is performed by padding, based on the total volume of the first finishing liquid, the first finishing liquid comprises the following components: 30-150 g / L of softener, 50-250 g / L of resin cross-linking agent, 5-50 g / L of catalyst, 0-5 g / L of penetrant, and the rest is water.

3. The method according to claim 1 or 2, wherein: When step 1 adopts the foaming method, the foaming ratio of the foaming is 1:5-1:25, and the foam application amount is 15-50%; preferably, the foaming is performed on the front side of the dark fabric or dark garment containing cellulose fiber; When the step 1 is performed by padding, the liquid carrying rate of the padding is 50-100%; In step 2, when the second finishing liquid is rolled, the liquid carrying rate of the rolling is 50-100%.

4. The method according to claim 1, wherein: The first baking temperature is 100-180°C, and the baking speed is 5-30m / min; The temperature of the second baking is 130-180° C., and the baking speed is 5-20 m / min.

5. The method according to claim 2, wherein: In the first finishing liquid, the softener is one or a combination of two or more of a polyethylene softener, a polyurethane softener, a fatty acid derivative softener and an organic silicone oil softener; The catalyst is MgCl2 and / or Na2SO4; The penetrant is fatty alcohol polyoxyethylene ether.

6. The method according to claim 1, wherein: In the second finishing liquid, the cellulose fiber protective agent is high-density polyethylene and / or polyurethane. Preferably, the number average molecular weight of the high-density polyethylene is 2000-5000; the number average molecular weight of the polyurethane is 10000-50000; The crosslinking agent is isocyanate and / or polyurethane.

7. The method according to claim 1, wherein: The cellulose fibers include natural fibers and / or regenerated cellulose fibers; Preferably, the natural fibers include cotton fibers and / or hemp fibers; The regenerated cellulose fiber includes one or a combination of two or more of viscose fiber, modal fiber and lyocell fiber.

8. The method according to claim 1, wherein: The color of the dark fabric or dark garment is a color with a dye dosage of ≥ 2% owf.

9. A dark fabric obtained by processing using the method according to any one of claims 1 to 8.

10. A dark-colored garment obtained by processing with the method according to any one of claims 1 to 8.

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