Shrink-proof treatment method for wool and cashmere fabric

Abstract

The invention discloses a shrink-proof treatment method for wool and cashmere fabrics in the field of wool and cashmere fabric treatment, which comprises the following steps: step 1, adding a silver ammonia solution into wool and cashmere fibers, treating for 30-55 minutes, then cleaning with clear water, and drying with steam to obtain treated wool and cashmere fibers for later use; 2, glycerin is added into fibers formed by compounding spandex fibers and polypropylene fibers, the fibers are soaked in a finishing solution after treatment, then cleaning and drying are conducted, and composite fibers are obtained for standby application; 3, the treated wool and cashmere fibers serve as warp yarns, the composite fibers serve as weft yarns, and the wool and cashmere fabric is obtained after the wool and cashmere fibers are woven on a machine and washed with deionized water. According to the invention, the loss of the strength of the composite fiber can be reduced, so that the overall shrink resistance of the fabric is effectively improved, and the silver ammonia solution and the glycerol can cooperate with each other, so that the fabric also has higher antibacterial performance.

Description

Technical Field

[0001] The invention discloses the field of wool and cashmere fabric processing, in particular to a shrinkage-proof processing method for wool and cashmere fabric. Background Art

[0002] Wool and cashmere fabrics are widely accepted by the public due to their excellent physical properties, comfortable wearing feeling, high-end appearance and texture, durability and cost-effectiveness, and diverse application scenarios.

[0003] Since the surface of the wool and cashmere fibers in wool and cashmere fabrics are covered with layers of scales, the scales have a certain height and thickness, and some of the scales have serrated edges, shaped like barbs, it is easy for the fibers to hook and stick to each other during wearing. During the washing process, the fibers rub against each other, and the serrated scales mesh with each other, resulting in shrinkage, which affects the use and aesthetics of the wool and cashmere fabrics. Therefore, this paper proposes a shrinkage-proof treatment method for wool and cashmere fabrics. Summary of the invention

[0004] The object of the present invention is to provide a shrinkage-proof treatment method for wool and cashmere fabrics to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A shrinkage-proof treatment method for wool and cashmere fabrics comprises the following steps:

[0007] Step 1: Add silver ammonia solution to wool and cashmere fibers for 30-55 minutes, then wash with water and steam dry to obtain treated wool and cashmere fibers for later use;

[0008] Step 2: adding glycerin to the fiber composited with spandex fiber and polypropylene fiber, soaking the fiber in a finishing solution after treatment, and then washing and drying to obtain composite fiber for standby use;

[0009] Step three: using the treated wool and cashmere fibers as warp threads and the composite fibers as weft threads, weaving the fibers on a loom and then washing with deionized water to obtain wool and cashmere fabrics.

[0010] A further improvement is that the wool and cashmere fibers have a diameter of 0.01-0.04 mm.

[0011] A further improvement is that the concentration of the silver ammonia solution is 0.8-1.2 mol / L.

[0012] A further improvement is that the amount of glycerol used is 20-40wt%.

[0013] A further improvement is that the raw materials for preparing the finishing solution include, by weight: 35-50 parts of lotus leaf powder, 15-25 parts of nano silicon dioxide, 5-10 parts of dispersant and 45-60 parts of solvent.

[0014] A further improvement is that the preparation process of the finishing solution is as follows: adding a dispersant, lotus leaf powder and nano-silicon dioxide into a solvent, and stirring to obtain a uniformly dispersed finishing solution.

[0015] A further improvement is that the dispersant includes any one of vinyl triethoxysilane, calcium stearate, zinc stearate or methacryloxypropyl trimethoxysilane or a combination of at least two thereof.

[0016] A further improvement is that the solvent is deionized water or ethanol.

[0017] A further improvement is that in the step 2, after the fiber is immersed in the finishing solution, ultrasonic treatment is applied simultaneously, and the power of the ultrasonic treatment is 300 W, the frequency is 30 kHz, and the time is 40-90 min.

[0018] A further improvement is that in step three, the weaving is carried out on a machine with warp and weft parameters of 110 threads / 10 cm in warp density and 110 threads / 10 cm in weft density.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1) The present invention uses a silver ammonia solution to treat wool and cashmere fibers to soften fiber scales and reduce friction between fibers. The present invention uses glycerol to treat a composite of spandex fiber and polypropylene fiber, which can reduce the loss of composite fiber strength, thereby effectively improving the overall anti-shrinkage performance of the fabric. The silver ammonia solution and glycerol can cooperate with each other, so that the fabric also has higher antibacterial performance.

[0021] 2) The glycerol of the present invention forms a porous structure on the surface of the composite fiber, and then the composite fiber is treated with a finishing solution. The lotus leaf powder and nano-silicon dioxide in the finishing solution are filled in the porous structure on the surface of the composite fiber, which can not only reduce the entry of liquid into the fabric, but also cooperate with the nano-silicon dioxide to enhance the strength and deformation resistance of the fabric, so that the processed fabric maintains a stable shape during the washing process, reduces shrinkage, and ensures the dimensional stability of the fabric. DETAILED DESCRIPTION

[0022] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Example 1

[0024] A shrinkage-proof treatment method for wool and cashmere fabrics comprises the following steps:

[0025] Step 1: Adding a silver ammonia solution with a concentration of 0.8 mol / L to wool and cashmere fibers with a diameter of 0.04 mm, treating the fibers for 30 minutes, then washing with clean water and steam drying the fibers to obtain treated wool and cashmere fibers for later use;

[0026] Step 2: adding 20 wt% glycerol to the composite fiber of spandex fiber and polypropylene fiber, and then immersing the fiber in a finishing solution and applying ultrasonic treatment at a power of 300 W, a frequency of 30 kHz, and a time of 40 min, and then washing and drying to obtain the composite fiber for standby use;

[0027] The raw materials for preparing the finishing solution include, by weight: 35 parts of lotus leaf powder, 15 parts of nano silicon dioxide, 5 parts of vinyl triethoxysilane and 45 parts of deionized water;

[0028] The preparation process of the finishing solution is as follows: vinyl triethoxysilane, lotus leaf powder and nano silicon dioxide are added to deionized water, and stirred to obtain a uniformly dispersed finishing solution;

[0029] Step 3: Using the treated wool and cashmere fibers as warp threads and the composite fibers as weft threads, weaving the fibers on a machine with warp and weft parameters of 110 threads / 10 cm in warp density and 110 threads / 10 cm in weft density, and then washing with deionized water to obtain wool and cashmere fabrics.

[0030] Example 2

[0031] A shrinkage-proof treatment method for wool and cashmere fabrics comprises the following steps:

[0032] Step 1: Adding a silver ammonia solution with a concentration of 1 mol / L to wool and cashmere fibers with a diameter of 0.04 mm and treating for 30 minutes, then washing with clean water and steam drying to obtain treated wool and cashmere fibers for later use;

[0033] Step 2: adding 20 wt% glycerol to the composite fiber of spandex fiber and polypropylene fiber, and then immersing the fiber in a finishing solution and applying ultrasonic treatment at a power of 300 W, a frequency of 30 kHz, and a time of 40 min, and then washing and drying to obtain the composite fiber for standby use;

[0034] The raw materials for preparing the finishing solution include, by weight: 35 parts of lotus leaf powder, 15 parts of nano silicon dioxide, 5 parts of vinyl triethoxysilane and 45 parts of deionized water;

[0035] The preparation process of the finishing solution is as follows: vinyl triethoxysilane, lotus leaf powder and nano silicon dioxide are added to deionized water, and stirred to obtain a uniformly dispersed finishing solution;

[0036] Step 3: Using the treated wool and cashmere fibers as warp threads and the composite fibers as weft threads, weaving the fibers on a machine with warp and weft parameters of 110 threads / 10 cm in warp density and 110 threads / 10 cm in weft density, and then washing with deionized water to obtain wool and cashmere fabrics.

[0037] Example 3

[0038] A shrinkage-proof treatment method for wool and cashmere fabrics comprises the following steps:

[0039] Step 1: Adding a silver ammonia solution with a concentration of 1.2 mol / L to wool and cashmere fibers with a diameter of 0.04 mm and treating for 30 minutes, then washing with clean water and steam drying to obtain treated wool and cashmere fibers for later use;

[0040] Step 2: adding 20 wt% glycerol to the composite fiber of spandex fiber and polypropylene fiber, and then immersing the fiber in a finishing solution and applying ultrasonic treatment at a power of 300 W, a frequency of 30 kHz, and a time of 40 min, and then washing and drying to obtain the composite fiber for standby use;

[0041] The raw materials for preparing the finishing solution include, by weight: 35 parts of lotus leaf powder, 15 parts of nano silicon dioxide, 5 parts of vinyl triethoxysilane and 45 parts of deionized water;

[0042] The preparation process of the finishing solution is as follows: vinyl triethoxysilane, lotus leaf powder and nano silicon dioxide are added to deionized water, and stirred to obtain a uniformly dispersed finishing solution;

[0043] Step 3: Using the treated wool and cashmere fibers as warp threads and the composite fibers as weft threads, weaving the fibers on a machine with warp and weft parameters of 110 threads / 10 cm in warp density and 110 threads / 10 cm in weft density, and then washing with deionized water to obtain wool and cashmere fabrics.

[0044] Comparative Example 1

[0045] A shrinkage-proof treatment method for wool and cashmere fabrics comprises the following steps:

[0046] Step 1: adding a sodium hypochlorite solution with a concentration of 1 mol / L to wool and cashmere fibers with a diameter of 0.04 mm, treating the fibers for 30 minutes, then washing with clean water and steam drying the fibers to obtain treated wool and cashmere fibers for later use;

[0047] Step 2: adding 20 wt% glycerol to the composite fiber of spandex fiber and polypropylene fiber, and then immersing the fiber in a finishing solution and applying ultrasonic treatment at a power of 300 W, a frequency of 30 kHz, and a time of 40 min, and then washing and drying to obtain the composite fiber for standby use;

[0048] The raw materials for preparing the finishing solution include, by weight: 35 parts of lotus leaf powder, 15 parts of nano silicon dioxide, 5 parts of vinyl triethoxysilane and 45 parts of deionized water;

[0049] The preparation process of the finishing solution is as follows: vinyl triethoxysilane, lotus leaf powder and nano silicon dioxide are added to deionized water, and stirred to obtain a uniformly dispersed finishing solution;

[0050] Step 3: Using the treated wool and cashmere fibers as warp threads and the composite fibers as weft threads, weaving the fibers on a machine with warp and weft parameters of 110 threads / 10 cm in warp density and 110 threads / 10 cm in weft density, and then washing with deionized water to obtain wool and cashmere fabrics.

[0051] Comparative Example 2

[0052] A shrinkage-proof treatment method for wool and cashmere fabrics comprises the following steps:

[0053] Step 1: Adding a silver ammonia solution with a concentration of 1 mol / L to wool and cashmere fibers with a diameter of 0.04 mm and treating for 30 minutes, then washing with clean water and steam drying to obtain treated wool and cashmere fibers for later use;

[0054] Step 2: soaking the composite fiber of spandex fiber and polypropylene fiber in a finishing solution and applying ultrasonic treatment at the same time, the power of ultrasonic treatment is 300W, the frequency is 30kHz, and the time is 40min, followed by washing and drying to obtain composite fiber for standby use;

[0055] The raw materials for preparing the finishing solution include, by weight: 35 parts of lotus leaf powder, 15 parts of nano silicon dioxide, 5 parts of vinyl triethoxysilane and 45 parts of deionized water;

[0056] The preparation process of the finishing solution is as follows: vinyl triethoxysilane, lotus leaf powder and nano silicon dioxide are added to deionized water, and stirred to obtain a uniformly dispersed finishing solution;

[0057] Step 3: Using the treated wool and cashmere fibers as warp threads and the composite fibers as weft threads, weaving the fibers on a machine with warp and weft parameters of 110 threads / 10 cm in warp density and 110 threads / 10 cm in weft density, and then washing with deionized water to obtain wool and cashmere fabrics.

[0058] Comparative Example 3

[0059] A shrinkage-proof treatment method for wool and cashmere fabrics comprises the following steps:

[0060] Step 1: Adding a silver ammonia solution with a concentration of 1 mol / L to wool and cashmere fibers with a diameter of 0.04 mm and treating for 30 minutes, then washing with clean water and steam drying to obtain treated wool and cashmere fibers for later use;

[0061] Step 2: adding 20 wt% glycerol to the composite fiber of spandex fiber and polypropylene fiber, then washing and drying to obtain composite fiber for standby use;

[0062] Step 3: Using the treated wool and cashmere fibers as warp threads and the composite fibers as weft threads, weaving the fibers on a machine with warp and weft parameters of 110 threads / 10 cm in warp density and 110 threads / 10 cm in weft density, and then washing with deionized water to obtain wool and cashmere fabrics.

[0063] Performance Testing:

[0064] Fabric samples were prepared according to the methods of the above-mentioned Examples 1-3 and Comparative Examples 1-3, and each fabric sample was cut into 20 mm×20 mm sizes to obtain six groups of samples. The following performance tests were performed on the six groups of samples:

[0065] 1. Shrinkage test: Fold the sample in half and sew it with polyester thread, make a cross mark in the length and width direction, and record the longitudinal and transverse dimensions L0 before shrinkage. At room temperature, place the sample in a washing machine and wash it continuously for 1 hour, then take it out and lay it flat in a 50℃ oven to dry, and record the longitudinal and transverse dimensions L1. Calculate the shrinkage of the sample based on L0 and L1 and make statistics. The calculation formula is as follows:

[0066] 2. Antibacterial test: After the six groups of samples passed the above shrinkage test, the six groups of samples were subjected to antibacterial test according to GB / T20944.2-2007 "Evaluation of antibacterial properties of textiles Part 2: Absorption method", and the test bacteria: Escherichia coli 8099 (Gram-negative bacteria) (including but not limited to this bacteria, and can also be Staphylococcus aureus, Candida, Escherichia coli, etc.);

[0067] The test results are shown in the following table:

[0068]

[0069] Conclusion: From the above table, it can be seen that the fabric treated in Example 2 of the present invention has a radial shrinkage rate of 2.03% and a weft shrinkage rate of 0.78, which has a high anti-shrinkage performance and a high antibacterial performance. Although the treatments in Example 1 and Example 3 also have excellent anti-shrinkage performance and antibacterial performance, Example 2 has the best performance compared with Example 1 and Example 3.

[0070] In Comparative Example 1, sodium hypochlorite solution was used to replace the silver ammonia solution, and in Comparative Example 2, glycerol treatment was not used. It can be seen that the anti-shrinkage performance of Comparative Examples 1 and 2 is poor and the antibacterial performance is also greatly reduced. This is because the silver ammonia solution is weakly oxidizing and can soften the fiber scales and reduce the friction between the fibers. At the same time, glycerol has lubricity and can form a porous structure on the surface of the composite fiber, thereby ensuring that the subsequent finishing solution is fully filled in the composite fiber, effectively reducing the loss of composite fiber strength, and improving the overall anti-shrinkage performance of the fabric. In addition, the silver ammonia solution and glycerol can react under appropriate conditions to generate glycerol monoammonium carbamate, silver element, ammonia gas and water. The generated silver element is also antibacterial, thereby making the fabric have higher antibacterial performance.

[0071] No finishing solution was used in Comparative Example 3, and the anti-shrinkage performance of the fabric prepared therefrom was poor. This was because the lotus leaf powder and nano-silicon dioxide in the finishing solution were filled in the porous structure on the surface of the composite fiber after the composite fiber was treated with glycerol. The lotus leaf powder reduced the amount of liquid entering the fabric during the washing process of the wool and cashmere fabric, and at the same time, nano-silicon dioxide enhanced the strength and deformation resistance of the fiber, so that the treated fabric maintained a stable shape during the washing process, reduced shrinkage, and ensured the dimensional stability of the fabric.

[0072] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A shrinkage-proof treatment method for wool and cashmere fabrics, characterized in that: The following steps are involved: Step 1: Add silver ammonia solution to wool and cashmere fibers for 30-55 minutes, then wash with water and steam dry to obtain treated wool and cashmere fibers for later use; Step 2: adding glycerin to the fiber composited with spandex fiber and polypropylene fiber, soaking the fiber in a finishing solution after treatment, and then washing and drying to obtain composite fiber for standby use; Step three: using the treated wool and cashmere fibers as warp threads and the composite fibers as weft threads, weaving the fibers on a loom and then washing with deionized water to obtain wool and cashmere fabrics.

2. The shrinkage-resistant treatment method for wool and cashmere fabric according to claim 1, characterized in that: The wool and cashmere fiber has a diameter of 0.01-0.04 mm.

3. The shrinkage-resistant treatment method for wool and cashmere fabric according to claim 1, characterized in that: The concentration of the silver ammonia solution is 0.8-1.2 mol / L.

4. The shrinkage-resistant treatment method for wool and cashmere fabric according to claim 1, characterized in that: The amount of glycerol used is 20-40wt%.

5. The shrinkage-resistant treatment method for wool and cashmere fabric according to claim 1, characterized in that: The raw materials for preparing the finishing solution include, by weight: 35-50 parts of lotus leaf powder, 15-25 parts of nano silicon dioxide, 5-10 parts of dispersant and 45-60 parts of solvent.

6. The shrinkage-resistant treatment method for wool and cashmere fabric according to claim 5, characterized in that: The preparation process of the finishing solution is as follows: adding a dispersant, lotus leaf powder and nano silicon dioxide into a solvent, and stirring to obtain a uniformly dispersed finishing solution.

7. The shrinkage-resistant treatment method for wool and cashmere fabrics according to claim 6, characterized in that: The dispersant includes any one of vinyl triethoxysilane, calcium stearate, zinc stearate or methacryloxypropyl trimethoxysilane or a combination of at least two thereof.

8. The shrinkage-resistant treatment method for wool and cashmere fabrics according to claim 6, characterized in that: The solvent is deionized water or ethanol.

9. The shrinkage-resistant treatment method for wool and cashmere fabric according to claim 1, characterized in that: In the step 2, the fiber is immersed in the finishing solution and then subjected to ultrasonic treatment at a power of 300 W, a frequency of 30 kHz, and a time of 40-90 min.

10. The shrinkage-resistant treatment method for wool and cashmere fabrics according to claim 1, characterized in that: In the step 3, the weaving is carried out on a machine with warp and weft parameters of 110 threads / 10 cm in warp density and 110 threads / 10 cm in weft density.

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