Antibacterial and warm composite fabric and preparation method thereof

Abstract

The application relates to the field of warm-keeping fabrics, and particularly discloses an antibacterial warm-keeping composite fabric and a preparation method thereof. The antibacterial warm-keeping composite fabric comprises an outer fabric and a filling material, the outer fabric comprises nanometer silver composite cotton fibers and polyester fibers, and the filling material comprises down; the preparation method is as follows: 70-75% nanometer silver composite cotton fibers and 25-30% polyester fibers are mixed and spun to obtain a blended yarn, the blended yarn is processed into the outer fabric by a knitting machine, and the outer fabric is heat set after weaving; the outer fabric is laid flat, the filling material is evenly distributed on the outer fabric, one layer of the outer fabric is laid on the surface of the filling material, and the layers are laminated by using a hot pressing method to obtain the antibacterial warm-keeping composite fabric. The antibacterial warm-keeping composite fabric has the advantages of meeting the dual requirements of consumers for clothes warm-keeping and antibacterial properties.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of thermal fabrics, more particularly, it relates to an antibacterial thermal composite fabric and a preparation method thereof. BACKGROUND

[0002] Thermal fabrics are mainly used to provide sufficient heat retention function in cold environments to maintain the comfortable temperature of the human body. Traditional thermal fabrics rely on thick fiber structure and high density to achieve thermal effect, but such design often leads to poor sweat absorption and moisture permeability of the fabric, and uncomfortable wearing.

[0003] In recent years, with the development of material science, various new thermal technologies have emerged, such as far infrared technology. Far infrared fibers can absorb and release far infrared energy by adding far infrared functional powder (such as ceramic powder, etc.) in the spinning process, thereby improving the thermal performance of the fabric. Such fabric not only can effectively accumulate the heat emitted by the human body, but also can convert the absorbed solar energy into far infrared radiation, further enhancing the thermal effect.

[0004] With the improvement of living standards and the popularization of health knowledge, people pay more and more attention to their own health status. In daily life, people realize the potential threat of bacteria, viruses and other microorganisms to health. Therefore, people begin to pay more attention to the antibacterial performance of clothes, and no longer satisfy the basic thermal demand. SUMMARY

[0005] In order to meet the dual demand of consumers for clothing thermal and antibacterial, the present application provides an antibacterial thermal composite fabric and a preparation method thereof.

[0006] The antibacterial thermal composite fabric provided by the present application adopts the following technical scheme:

[0007] An antibacterial thermal composite fabric, comprising an outer fabric and a filling material, the outer fabric comprising nano-silver composite cotton fibers and polyester fibers, and the filling material comprising down.

[0008] By adopting the above technical scheme, the introduction of the nanometer silver composite cotton fiber makes the fabric have excellent antibacterial performance. The nanometer silver particles have broad-spectrum antibacterial activity and can effectively inhibit the growth and reproduction of various bacteria, fungi and viruses. This antibacterial property not only prolongs the cleaning time of the clothes, but also reduces the generation of peculiar smell, improves the hygiene and wearing comfort of the clothes. The down feather as the filling material, because of its high loftiness and excellent warmth retention, makes the fabric can provide excellent warmth retention effect. The air layer in the down feather can effectively isolate the cold air outside, while maintaining the body temperature, so as to provide long-lasting warm protection in cold environment. The use of polyester fiber gives the fabric the characteristics of lightness and durability. The polyester fiber has high strength and elasticity, so that the fabric can maintain good shape without increasing too much weight, ensuring comfortable wearing. At the same time, the blending of polyester fiber and cotton fiber improves the softness of the fabric and enhances the comfortable feeling of close-fitting wearing.

[0009] Optionally, the preparation method of the nanometer silver composite cotton fiber is:

[0010] The cotton fiber is soaked in a sodium hydroxide solution with a mass fraction of 5-10% for alkali treatment, and the fiber after alkali treatment is neutralized with acid liquid and repeatedly washed with deionized water until neutral to obtain the activated cotton fiber;

[0011] The activated cotton fiber is soaked in a silver nanoparticle dispersion liquid with a silver ion concentration of 100-200ppm, and is immersed at a temperature of 50-60℃ and a stirring speed of 150-200r / min for 30-60min. After the immersion is completed, the fiber is taken out and slightly squeezed to remove excess liquid.

[0012] The cotton fiber loaded with nanometer silver is dried at 40-60℃ to obtain the nanometer silver composite cotton fiber.

[0013] By adopting the above technical scheme, the cotton fibers are soaked in a 5-10% sodium hydroxide solution for alkali treatment, aiming to remove impurities and wax layer on the surface of the cotton fibers and increase the active sites on the surface of the fibers. This treatment step makes the surface of the cotton fibers more hydrophilic, which is beneficial to the subsequent adsorption of silver nanoparticles. The fibers after alkali treatment are neutralized with an acid solution and repeatedly rinsed with deionized water to ensure that the fibers are in a neutral state. This step is to prevent damage to the fibers caused by residual alkaline substances and ensure the smooth progress of subsequent treatment. The activated cotton fibers are soaked in a silver nanoparticle dispersion liquid with a silver ion concentration of 100-200 ppm. By immersing at a temperature of 50-60°C and a stirring speed of 150-200 r / min, the silver nanoparticles are uniformly adsorbed on the surface of the cotton fibers. The appropriate temperature and stirring speed ensure the effective dispersion of silver nanoparticles and form a stable adhesion layer on the surface of the cotton fibers. This uniform loading method ensures the antibacterial effect of silver nanoparticles while not affecting the softness and other physical properties of the fibers. The immersed cotton fibers are dried at a temperature of 40-60°C. Lower drying temperature can avoid the loss or aggregation of silver nanoparticles while maintaining the softness of the cotton fibers. The obtained silver nanoparticle composite cotton fibers have good antibacterial performance and retain the original comfort of cotton fibers.

[0014] Optionally, thioglycolic acid is added to the dispersion liquid, and the addition amount of the thioglycolic acid is 0.1-0.17 g / L.

[0015] By adopting the above technical scheme, thioglycolic acid has -SH groups that can chemically bond with the surface of silver nanoparticles to form stable silver-sulfur bonds. This action effectively prevents the aggregation of silver nanoparticles in the solution, ensuring that the silver nanoparticles are uniformly attached to the surface of the cotton fibers. Thioglycolic acid not only stabilizes silver nanoparticles but also regulates the release rate of silver ions. Appropriate addition of thioglycolic acid (0.1-0.17 g / L) can ensure that silver nanoparticles have a sustained antibacterial effect and still have antibacterial function after long-term wear or multiple washes. Due to the addition of thioglycolic acid, silver nanoparticles are more uniformly distributed on the surface of the fibers, effectively increasing the surface activity area of the fibers. In this way, the antibacterial effect is further improved, which can more effectively inhibit the growth of bacteria.

[0016] Optionally, the outer layer fabric further comprises bamboo charcoal fibers.

[0017] By adopting the above technical scheme, the bamboo charcoal fiber is made of bamboo charcoal and has natural antibacterial property. The bamboo charcoal contains rich porous structure and can adsorb harmful substances and odors in the air and inhibit the breeding of bacteria and mold through its internal mineral composition. In combination with the nano-silver composite cotton fiber, the overall antibacterial property of the fabric is enhanced. The bamboo charcoal fiber has good moisture absorption and sweat-wicking capacity, keeping the skin dry. This is very important for thermal clothing that needs to be worn for a long time and can improve comfort.

[0018] Optionally, the filling material further comprises artificial down.

[0019] Optionally, the mass ratio of the down and the artificial down is 5:(2-4).

[0020] By adopting the above technical scheme, the down is a natural thermal material with fine and long fibers that can lock a large amount of air to form a good thermal layer. The down has high loft and can quickly rebound to maintain the volume and softness of the clothes. This makes the fabric not only warm but also comfortable to wear. The artificial down has good durability and water resistance. Compared with natural down, the artificial down can better maintain its thermal performance in a humid environment and is less likely to become heavy and clump. In addition, the artificial down is also treated with antibacterial property to prevent bacterial breeding and improve hygiene. Mixing the down and the artificial down in a mass ratio of 5:(2-4) makes the fabric retain the excellent thermal property of the down while increasing the durability and water resistance of the artificial down. This combination ensures that the fabric is both light and has good thermal effect, and is less likely to be damp and clump. The addition of the artificial down can enhance the structural stability of the fabric, reduce the movement and deformation of the filling material inside the fabric, and thus improve the durability and the persistence of the thermal performance of the clothing.

[0021] In a second aspect, the application provides a preparation method of an antibacterial thermal composite fabric, which adopts the following technical scheme: a preparation method of an antibacterial thermal composite fabric, comprising the following steps:

[0022] Mixing 70-75% nano-silver composite cotton fiber and 25-30% polyester fiber for spinning to obtain a blended yarn, and using a knitting machine to make the blended yarn into an outer layer fabric. After weaving, the outer layer fabric is heat set;

[0023] Laying the outer layer fabric, uniformly distributing the filling material on the outer layer fabric, and then laying another layer of outer layer fabric on the surface of the filling material. The layers are laminated by hot pressing to obtain an antibacterial thermal composite fabric.

[0024] By adopting the above technical scheme, the 70-75% nanometer silver composite cotton fiber and the 25-30% polyester fiber are blended, and the fabric is given good antibacterial property. In the preparation process, the blended yarn is knitted into the outer fabric, and the filling material (down and artificial down) is added between the two outer fabrics to form a good warm layer. The fluffiness of the down and the water resistance of the artificial down are combined, which not only improves the warmth retention performance, but also ensures the lightness and softness of the fabric. After the outer fabric is subjected to heat setting treatment, the structure of the fabric is more stable and is not easy to deform, and the durability and windproof performance of the fabric are improved. At the same time, the heat setting process makes the fabric more elastic and increases the comfort. The filling material is uniformly distributed between the two outer fabrics and is laminated by hot pressing, so that the layers of the fabric are firmly combined to form a tight composite structure. The process ensures that the fabric has good structural stability, and the filling material will not move or lump, further improving the durability and warmth retention of the garment.

[0025] Optionally, the filling material also needs to be treated before use as follows:

[0026] The filling material is immersed in a 30% mass concentration organic silicon quaternary ammonium salt solution for 10-30 minutes, the immersed down is preliminarily removed from the excess solution by a spinning device to avoid excessive moisture of the down, the down is dried at 40-60℃ until the down is completely dried, and the filling material is loosened by a loosening device.

[0027] By adopting the above technical scheme, the organic silicon quaternary ammonium salt can effectively inhibit the growth of various bacteria and fungi. The filling material (down or artificial down) is immersed in this solution for 10-30 minutes, so that the antibacterial agent is evenly covered on the surface of the fiber, thereby giving the filling material durable antibacterial property. This treatment step is crucial for improving the overall hygiene performance of the fabric, especially in high humidity or high sweat environment, which can effectively prevent the growth of microorganisms. The filling material is dried at a temperature range of 40-60℃, which can effectively remove the moisture in the filling material while maintaining the fluffiness and softness of the down, thereby ensuring the warmth retention effect of the filling material. After drying, the filling material is loosened by a loosening device. This step is to restore the fluffiness of the filling material to avoid the phenomenon of adhesion or agglomeration of the fibers during the immersion and drying process. The loosening treatment makes the distribution of the filling material more uniform, which helps to better play the warmth retention role in the filling process of the fabric.

[0028] In summary, the present application has the following beneficial effects:

[0029] 1、Due to the combination of nano-silver composite cotton fibers and polyester fibers in the present application, the fabric is endowed with excellent antibacterial performance and light durability. Nano-silver particles provide broad-spectrum antibacterial protection, effectively inhibit the growth of bacteria, fungi and viruses, prolong the cleaning time of clothes and reduce odor. Down as a filler, with its high loft and excellent warmth retention, provides sustained warmth in cold environments. Polyester fibers enhance the strength and elasticity of the fabric, ensuring comfortable and stable shape, making the fabric have excellent warmth retention, antibacterial and comfortable performance.

[0030] 2、In the present application, the cotton fibers are preferably treated with alkali to remove impurities and wax layer, then uniformly adsorbed with silver nanoparticles, combined with the addition of mercaptoacetic acid, so that the silver nanoparticles form a stable adherent layer on the surface of the fibers. The addition of mercaptoacetic acid prevents the aggregation of silver nanoparticles and regulates the release rate of silver ions, thereby ensuring the sustained antibacterial performance of the fibers. This processing step not only improves the antibacterial effect of nano-silver composite cotton fibers, but also retains the softness and comfort of the fibers, effectively inhibiting bacterial growth even after long-term wear or multiple washes.

[0031] 3、The method of the present application, by blending 70-75% nano-silver composite cotton fibers with 25-30% polyester fibers, weaving into an outer fabric, and filling down and artificial down in between, is made by hot pressing lamination process. Nano-silver composite cotton fibers endow the fabric with excellent antibacterial properties, while the combination of down and artificial down provides excellent warmth retention and lightness. Heat setting treatment improves the structural stability, wind resistance and durability of the fabric, ensuring firm combination of the materials in each layer, enhancing the warmth retention effect and overall comfort of the fabric. DETAILED DESCRIPTION

[0032] The present application is further described in detail below in conjunction with the examples, and it is particularly pointed out that: in the following examples, the specific conditions are not specified, and the conventional conditions or the conditions recommended by the manufacturer are used, and in the following examples, the raw materials used can be obtained from ordinary market sales unless otherwise specified.

[0033] Preparation example of nano-silver composite cotton fiber

[0034] Preparation example 1

[0035] Preparation method of nano-silver composite cotton fiber:

[0036] 20 kg of cotton fibers were soaked in an 8% sodium hydroxide solution for alkali treatment, soaked for 10 min, and the alkali-treated fibers were neutralized with citric acid and repeatedly washed with deionized water until neutral, obtaining activated cotton fibers;

[0037] The activated cotton fibers are soaked in a silver nanoparticle dispersion liquid with a silver ion concentration of 150 ppm, and then mercaptoacetic acid is added to the liquid with a concentration of 0.14 g / L. The soaking is performed at a temperature of 55°C and a stirring speed of 180 r / min for 45 min. After the soaking is completed, the fibers are taken out and slightly squeezed to remove the excess liquid.

[0038] The cotton fibers loaded with the silver nanoparticles are dried at 50°C to obtain the silver nanoparticle composite cotton fibers.

[0039] Preparation Example 2

[0040] A method for preparing the silver nanoparticle composite cotton fibers comprises the following steps:

[0041] 20 kg of cotton fibers are soaked in a sodium hydroxide solution with a mass fraction of 8% for alkaline treatment, and the soaking is performed for 10 min. The alkaline-treated fibers are neutralized with citric acid, and then repeatedly washed with deionized water until neutralization to obtain activated cotton fibers.

[0042] The activated cotton fibers are soaked in a silver nanoparticle dispersion liquid with a silver ion concentration of 150 ppm, and then mercaptoacetic acid is added to the liquid with a concentration of 0.14 g / L. The soaking is performed at a temperature of 55°C and a stirring speed of 180 r / min for 45 min. After the soaking is completed, the fibers are taken out and slightly squeezed to remove the excess liquid.

[0043] The cotton fibers loaded with the silver nanoparticles are dried at 50°C to obtain the silver nanoparticle composite cotton fibers.

[0044] Preparation Example 3

[0045] A method for preparing the silver nanoparticle composite cotton fibers comprises the following steps: The difference from the preparation example 2 is that the concentration of the mercaptoacetic acid is 0.07 g / L.

[0046] Preparation Example 4

[0047] A method for preparing the silver nanoparticle composite cotton fibers comprises the following steps: The difference from the preparation example 2 is that the concentration of the mercaptoacetic acid is 0.2 g / L.

[0048] Example

[0049] Example 1

[0050] A method for preparing an antibacterial and warm-keeping composite fabric comprises the following steps:

[0051] 7.5 kg of silver nanoparticle composite cotton fibers and 2.5 kg of polyester fibers are prepared. The silver nanoparticle composite cotton fibers are obtained by the process of the preparation example 1. The silver nanoparticle composite cotton fibers and the polyester fibers are spun into 50D blended yarns by a blending machine.

[0052] The prepared blended yarns are woven into an outer fabric by a plain weaving method on a weaving machine. After the weaving is completed, the outer fabric is subjected to a heat setting treatment at a temperature of 150°C for 60 s.

[0053] The outer layer fabric after heat setting treatment is laid on the workbench to ensure the surface is flat and has no creases. Duck down is selected as the filling material, which is evenly distributed on the laid outer layer fabric with a thickness of 5 mm. A layer of outer layer fabric is laid on the filling material, and the two layers of outer layer fabric and the filling material in between are laminated by hot pressing at a temperature of 140℃, a pressure of 3MPa, and a treatment time of 90s.

[0054] Example 2

[0055] A preparation method of an antibacterial and warm composite fabric: different from example 1 is that 7kg of nano-silver composite cotton fiber, 2kg of polyester fiber and 1kg of bamboo charcoal fiber are blended to obtain 50D blended yarn.

[0056] Example 3

[0057] A preparation method of an antibacterial and warm composite fabric: different from example 1 is that the filling material is selected by mixing duck down and artificial down in a mass ratio of 5:2.

[0058] Example 4

[0059] A preparation method of an antibacterial and warm composite fabric: different from example 1 is that the filling material is selected by mixing duck down and artificial down in a mass ratio of 5:3.

[0060] Example 5

[0061] A preparation method of an antibacterial and warm composite fabric: different from example 1 is that the filling material is selected by mixing duck down and artificial down in a mass ratio of 5:4.

[0062] Example 6

[0063] A preparation method of an antibacterial and warm composite fabric: different from example 1 is that the nano-silver composite cotton fiber is obtained by the process of preparation example 2.

[0064] Example 7

[0065] A preparation method of an antibacterial and warm composite fabric: different from example 1 is that the filling material is immersed in a 30% organic silicon quaternary ammonium salt solution for 20 minutes before use. The down after immersion is preliminarily removed by a spinning device to avoid excessive moisture of the down. The down is dried at 50℃ until completely dry, and the filling material is loosened by a loosening device.

[0066] Comparative example

[0067] Comparative example 1

[0068] A preparation method of an antibacterial and warm composite fabric:

[0069] Prepare 7.5 kg of cotton fiber and 2.5 kg of polyester fiber. The nano-silver composite cotton fiber is obtained by the process of Preparation Example 1, and the nano-silver composite cotton fiber is spun with the polyester fiber through a blending machine to obtain a 50D blended yarn;

[0070] The prepared blended yarn is woven into an outer fabric on a weaving machine by flat weaving method, and after weaving is completed, the outer fabric is subjected to heat setting treatment at 150°C for 60s;

[0071] The outer fabric after heat setting treatment is laid flat on the workbench to ensure that the surface is flat and has no creases. The filler is selected to be duck down, which is evenly distributed on the laid outer fabric with a thickness of 5mm. A layer of outer fabric is laid on the filler, and the two layers of outer fabric and the filler in between are laminated by hot pressing at a temperature of 140°C, a pressure of 3MPa, and a treatment time of 90s.

[0072] Comparative Example 2

[0073] A method for preparing an antibacterial and warm composite fabric: the difference from Example 6 is that the nano-silver composite cotton fiber is obtained by the process of Preparation Example 3.

[0074] Comparative Example 3

[0075] A method for preparing an antibacterial and warm composite fabric: the difference from Example 6 is that the nano-silver composite cotton fiber is obtained by the process of Preparation Example 4.

[0076] Performance test

[0077] Test method

[0078] Thermal retention rate test

[0079] Heat the sample to a temperature of 60°C, remove the heat source, and record the temperature change of the sample over a period of time. Calculate the thermal retention rate of the sample, i.e. the percentage of temperature drop of the sample after a period of time. The higher the thermal retention rate, the better the thermal retention performance of the fabric.

[0080] Antibacterial test

[0081] According to standard ISO 20743, E. coli bacterial suspension is inoculated onto the fabric sample, and after 24 hours of incubation at 37°C, the number of bacteria on the sample is determined and compared with the control sample to calculate the antibacterial activity value. The larger the antibacterial activity value, the better the antibacterial effect of the fabric.

[0082] Table 1 test data

[0083] Heat retention rate / % Antibacterial activity value Example 1 61.5 ＞3 Example 2 61.3 ＞3 Example 3 64.0 ＞3 Example 4 63.8 ＞3 Example 5 63.4 ＞3 Example 6 64.2 ＞3 Example 7 64.3 ＞3 Comparative Example 1 60.3 ＜2 Comparative Example 2 60.5 ＞3 Comparative Example 3 58.6 2-3

[0084] It can be seen from the combination of Embodiment 1 and Comparative Example 1 and Table 1 that the introduction of the nano-silver composite cotton fiber makes the fabric have excellent antibacterial performance. The nano-silver particles have broad-spectrum antibacterial activity and can effectively inhibit the growth and reproduction of various bacteria, fungi and viruses.

[0085] It can be seen from the combination of Embodiment 6 and Comparative Examples 2-3 and Table 1 that the appropriate addition of mercaptoacetic acid (0.1-0.17 g / L) can ensure that the nano-silver has a sustained antibacterial effect and can still play an antibacterial function after long-term wearing or multiple washing. Too low effect is not obvious, and too high will affect the nano-silver composite effect.

[0086] It can be seen from the combination of Embodiments 1-6 and Table 1 that the bamboo charcoal fiber is made of bamboo charcoal and has natural antibacterial properties. The bamboo charcoal contains rich porous structure and can adsorb harmful substances and odors in the air and inhibit the breeding of bacteria and mold through its internal mineral components. The combination with the nano-silver composite cotton fiber enhances the overall antibacterial performance of the fabric. The mixing of the down and the artificial down at a mass ratio of 5:(2-4) makes the fabric retain the excellent warmth of the down while increasing the durability and water resistance of the artificial down. The organosilicon quaternary ammonium salt can effectively inhibit the growth of various bacteria and fungi. Immersing the filler in this solution for 10-30 minutes makes the antibacterial agent evenly cover the surface of the fiber, thereby endowing the filler with persistent antibacterial performance.

[0087] The specific embodiments are only an explanation of the present application, which is not a limitation of the present application. Those skilled in the art can make modifications to the embodiments without creative contribution after reading the present specification, but as long as the modifications are within the scope of the claims of the present application, they are protected by the Patent Law.

Claims

1. An antibacterial and thermal insulation composite fabric, characterized in that: The invention comprises an outer layer fabric and a filling material, wherein the outer layer fabric comprises nano-silver composite cotton fiber and polyester fiber, and the filling material comprises down. The preparation method of the nano-silver composite cotton fiber is as follows: The cotton fibers are immersed in a sodium hydroxide solution with a mass fraction of 5-10% for alkali treatment, the alkali-treated fibers are neutralized with an acid solution, and the fibers are repeatedly rinsed with deionized water until they are neutral, thereby obtaining activated cotton fibers; The activated cotton fiber is immersed in a dispersion of silver nanoparticles with a silver ion concentration of 100-200 ppm, and the immersion temperature is 50-60°C and the stirring speed is 150-200 r / min for 30-60 minutes. After the immersion is completed, the fiber is taken out and gently squeezed to remove excess liquid; The nanosilver-loaded cotton fiber is dried at 40-60° C. to obtain nanosilver composite cotton fiber; thioglycolic acid is also added to the dispersion, and the addition amount of the thioglycolic acid is 0.1-0.17 g / L.

2. The antibacterial thermal insulation composite fabric according to claim 1, characterized in that: The outer fabric also includes bamboo charcoal fiber.

3. The antibacterial thermal insulation composite fabric according to claim 1, characterized in that: The filling material also includes artificial down.

4. The antibacterial thermal insulation composite fabric according to claim 3, characterized in that: The mass ratio of the down to the artificial down is 5:(2-4).

5. A method for preparing the antibacterial thermal insulation composite fabric according to any one of claims 1 to 4, characterized in that: The following steps are involved: 70-75% nano-silver composite cotton fiber and 25-30% polyester fiber are mixed and spun to obtain a blended yarn, which is then made into an outer fabric using a weaving machine. After weaving, the outer fabric is heat-set; The outer fabric is laid flat, the filling material is evenly distributed on the outer fabric, and another layer of outer fabric is laid flat on the surface of the filling material, and laminated using a hot pressing method to obtain an antibacterial and warm composite fabric.

6. The method for preparing the antibacterial thermal insulation composite fabric according to claim 5, characterized in that: The filler also needs to undergo the following treatment before use: Immerse the filling material in a 30% mass concentration organosilicon quaternary ammonium salt solution for 10-30 minutes. Pass the soaked down through a spin-drying device to initially remove excess solution to prevent the down from being overly wet. Dry the down at 40-60°C until it is completely dry, and loosen the filling material again through a loosening device.