Antibacterial fabric with composite silk fabric layer and preparation method thereof

Abstract

The invention relates to the technical field of functional textile materials, and discloses an antibacterial fabric with a composite silk fabric layer and a preparation method thereof.The antibacterial fabric comprises a base layer, the composite silk fabric layer and an antibacterial layer, the composite silk fabric layer is formed by interweaving warp and weft, the antibacterial layer is coated on the surface of the composite silk fabric layer, and the antibacterial fabric further comprises a functional layer, the functional layer is composed of a surface layer, a middle layer and a bottom layer, and the base layer is composed of high-density fibers and provides tough support; the antibacterial layer is made of a nano silver ion material and can effectively inhibit bacterium breeding. Through application of high-temperature hot pressing and ultrasonic cleaning processes, tight adhesion and purity among layers are ensured, the service life of the fabric is prolonged, the safety of the fabric is improved, the stability and durability of the antibacterial performance of the fabric are verified through multiple washing tests, the maintenance cost is remarkably reduced, and the fabric is worthy of popularization and application. The double requirements of the market on efficient antibacterial property and comfort of the fabric are met.

Description

Technical Field

[0001] The invention relates to the technical field of functional textile materials, in particular to an antibacterial fabric with a composite silk fabric layer and a preparation method thereof. Background Art

[0002] Existing antibacterial fabric technologies are mostly focused on a single function (such as only antibacterial or only waterproof) or simple material composites (such as silver fiber + bamboo charcoal). There is currently little research on antibacterial fabrics with composite silk fabric layers, and there are problems such as short-lasting antibacterial effect and poor air permeability. In addition, the structural design of the composite silk fabric layer is unreasonable, which leads to the easy loss of antibacterial components and affects the overall performance of the fabric.

[0003] To this end, the present invention provides an antibacterial fabric with a composite silk fabric layer and a preparation method thereof, which achieves long-lasting antibacterial effect and good air permeability through structural optimization of the composite silk fabric layer and multi-mechanism synergistic antibacterial, effectively prevents the loss of antibacterial components, improves the comprehensive performance of the fabric, and meets market demand. Summary of the invention

[0004] The object of the present invention is to provide an antibacterial fabric with a composite silk fabric layer and a preparation method thereof, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an antibacterial fabric with a composite silk fabric layer, comprising a base layer, a composite silk fabric layer and an antibacterial layer, wherein the composite silk fabric layer is formed by interweaving warp and weft, the antibacterial layer is coated on the surface of the composite silk fabric layer, and also includes a functional layer, the functional layer is formed by a surface layer, an intermediate layer and a bottom layer, the base layer is composed of high-density fibers to provide strong support; the antibacterial layer is made of nano silver ion material, which can effectively inhibit the growth of bacteria.

[0006] Preferably, the warp is blended with 40% mulberry silk and 60% cuprammonia fiber to enhance flexibility and moisture conductivity, while the weft is blended with 50% pearl fiber, 30% tea fiber and 20% aloe fiber to have both antibacterial and skin care functions.

[0007] Preferably, the surface layer is embedded with a three-dimensional breathable grid of nano titanium dioxide fibers to achieve photocatalytic antibacterial properties, wherein the particle size of the nano titanium dioxide fibers is 20-50 nm.

[0008] Preferably, the middle layer has vertical air holes filled with bamboo charcoal fiber particles to physically absorb odor and microorganisms; the porosity of the bamboo charcoal particles in the middle layer is 85-90%, and the particle size distribution is 50-200 μm.

[0009] Preferably, the bottom layer is a silver-plated fiber braided layer, which enhances the lasting antibacterial property through a contact killing mechanism, wherein the silver content is ≥98%.

[0010] Another technical problem to be solved by the present invention is to provide a method for preparing an antibacterial fabric with a composite silk fabric layer, which is characterized by comprising the following steps: The base layer, composite silk fabric layer, antibacterial layer and functional layer are stacked in sequence and tightly bonded through high-temperature hot pressing process to ensure seamless connection between the layers; ultrasonic cleaning is then carried out to remove surface impurities to ensure the purity of the material; and finally ultraviolet sterilization treatment is carried out; 1. Preparation of composite silk fabric layer: The warp yarn was dyed with the help of ultrasonic wave (frequency 40kHz, temperature 60℃, time 30min) using the extract of Galla chinensis; the weft yarn was blended after being treated with low temperature plasma (power 200W, time 5min); After the warp and weft are blended, they are subjected to high-temperature setting treatment (temperature 180°C, time 15 minutes) to ensure the stability of the fiber structure; 2. Antibacterial coating: The nano silver ion solution was evenly sprayed on the surface of the composite silk fabric layer, and ultrasonic atomization technology (frequency 50kHz, pressure 0.5MPa) was used to ensure uniform coating coverage; then infrared drying (temperature 80℃, time 20min) was performed to solidify the silver ion coating; finally, the coating thickness was detected by electron microscopy to ensure that the thickness was within the range of 50-100nm to ensure a lasting antibacterial effect; 3. Functional layer composite: The bamboo charcoal-nanosilver composite aerogel (porosity 90%) was injected into a hot pressing mold and pressed with the silk fabric layer under a gradient temperature (80℃→120℃→150℃), a pressure of 10MPa, and a time of 20min to form a dense composite structure; then it was cold pressed to ensure close bonding between the layers; finally, the interface of the composite layer was detected by X-ray diffractometer to confirm that the interface bonding strength was ≥90MPa, ensuring that the functional layer was stable and durable; the overall material was washed and tested many times, and the antibacterial performance retention rate was ≥95%, and there was no residual odor, which met the national antibacterial material standards.

[0011] The present invention provides an antibacterial fabric with a composite silk fabric layer and a preparation method thereof. It has the following beneficial effects: (1) The present invention significantly improves the antibacterial durability and air permeability of the fabric through a multi-level composite structure, effectively solving the problem of easy failure and poor air permeability of traditional antibacterial fabrics. The synergistic effect of bamboo charcoal particles and nano silver ions enhances the odor adsorption and microbial killing capabilities, improves the versatility and environmental protection of the fabric, and is suitable for medical, household and other fields.

[0012] (2) The present invention ensures the close adhesion and purity between the layers through the use of high-temperature hot pressing and ultrasonic cleaning processes, thereby improving the service life and safety of the fabric. Multiple washing tests have verified the stability and durability of its antibacterial properties, significantly reducing maintenance costs and meeting the market's dual demands for high-efficiency antibacterial properties and comfort.

[0013] (3) The present invention utilizes the synergistic effect of the triple antibacterial mechanism to effectively block the bacterial breeding and transmission pathways, significantly improve the comprehensive protective performance of the fabric, and provide more comprehensive health protection for various application scenarios. Especially in susceptible environments, its protective effect is more significant, greatly reducing the risk of cross infection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the composite silk fabric layer structure of the present invention; Figure 2 This is an electron microscope image of the three-dimensional grid of nano titanium dioxide of the present invention; Figure 3 This is a micrograph of the cross section of the air pores filled with bamboo charcoal of the present invention; Figure 4 This is a process flow chart of the gradient temperature hot pressing process of the present invention. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in 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.

[0016] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention. Example

[0017] A preferred embodiment of an antibacterial fabric with a composite silk fabric layer and a preparation method thereof provided by the present invention is as follows: Figure 1-4 As shown: an antibacterial fabric with a composite silk fabric layer, comprising a base layer, a composite silk fabric layer and an antibacterial layer, wherein the composite silk fabric layer is formed by interweaving warp and weft, the antibacterial layer is coated on the surface of the composite silk fabric layer, and also comprises a functional layer, the functional layer is formed by a surface layer, an intermediate layer and a bottom layer, the base layer is composed of high-density fibers to provide strong support; the antibacterial layer is made of nano silver ion material, which can effectively inhibit the growth of bacteria; The warp is a blend of 40% mulberry silk and 60% cuprammonium fiber to improve flexibility and moisture conductivity, while the weft is a blend of 50% pearl fiber, 30% tea fiber, and 20% aloe fiber, which has both antibacterial and skin care functions. The surface layer is embedded with a three-dimensional breathable grid of nano-titanium dioxide fibers to achieve photocatalytic antibacterial properties, wherein the particle size of the nano-titanium dioxide fibers is 20nm; The middle layer is filled with vertical air holes filled with bamboo charcoal fiber particles to physically absorb odor and microorganisms; the porosity of the bamboo charcoal particles in the middle layer is 85% and the particle size distribution is 50 μm; The bottom layer is a silver-plated fiber woven layer, which enhances long-lasting antibacterial properties through a contact killing mechanism, and the silver content is ≥98%.

[0018] Another technical problem to be solved by the present invention is to provide a method for preparing an antibacterial fabric with a composite silk fabric layer, comprising the following steps: The base layer, composite silk fabric layer, antibacterial layer and functional layer are stacked in sequence and tightly bonded through high-temperature hot pressing process to ensure seamless connection between the layers; ultrasonic cleaning is then carried out to remove surface impurities to ensure the purity of the material; and finally ultraviolet sterilization treatment is carried out; 1. Preparation of composite silk fabric layer: The warp was dyed with the help of ultrasonic wave (frequency 40kHz, temperature 60℃, time 30min) using the extract of Galla chinensis; the weft was blended after being treated with low temperature plasma (power 200W, time 5min); After the warp and weft are blended, they are subjected to high-temperature setting treatment (temperature 180°C, time 15 minutes) to ensure the stability of the fiber structure; 2. Antibacterial coating: The nano silver ion solution was evenly sprayed on the surface of the composite silk fabric layer, and ultrasonic atomization technology (frequency 50kHz, pressure 0.5MPa) was used to ensure uniform coating coverage; then infrared drying (temperature 80℃, time 20min) was performed to solidify the silver ion coating; finally, the coating thickness was detected by electron microscopy to ensure that the thickness was within the range of 50nm to ensure a lasting antibacterial effect; 3. Functional layer composite: The bamboo charcoal-nanosilver composite aerogel (porosity 90%) was injected into a hot pressing mold and pressed with the silk fabric layer under a gradient temperature (80℃→120℃→150℃), a pressure of 10MPa, and a time of 20min to form a dense composite structure; then it was cold pressed to ensure close bonding between the layers; finally, the interface of the composite layer was detected by X-ray diffractometer to confirm that the interface bonding strength was ≥90MPa, ensuring that the functional layer was stable and durable; the overall material was washed and tested many times, and the antibacterial performance retention rate was ≥95%, and there was no residual odor, which met the national antibacterial material standards. Example

[0019] See also Figure 1-Figure 4 , and on the basis of Example 1, further obtained: an antibacterial fabric with a composite silk fabric layer, comprising a base layer, a composite silk fabric layer and an antibacterial layer, wherein the composite silk fabric layer is formed by interweaving warp and weft, the antibacterial layer is coated on the surface of the composite silk fabric layer, and also includes a functional layer, the functional layer is formed by a surface layer, an intermediate layer and a bottom layer, the base layer is composed of high-density fibers to provide strong support; the antibacterial layer is made of nano silver ion material, which can effectively inhibit the growth of bacteria; The warp is a blend of 40% mulberry silk and 60% cuprammonium fiber to improve flexibility and moisture conductivity, while the weft is a blend of 50% pearl fiber, 30% tea fiber, and 20% aloe fiber, which has both antibacterial and skin care functions. The surface layer is embedded with a three-dimensional breathable grid of nano-titanium dioxide fibers to achieve photocatalytic antibacterial properties, wherein the particle size of the nano-titanium dioxide fibers is 45nm; The middle layer has vertical air holes filled with bamboo charcoal fiber particles to physically absorb odor and microorganisms; the porosity of the bamboo charcoal particles in the middle layer is 88% and the particle size distribution is 150 μm; The bottom layer is a silver-plated fiber woven layer, which enhances long-lasting antibacterial properties through a contact killing mechanism, and the silver content is ≥98%.

[0020] Another technical problem to be solved by the present invention is to provide a method for preparing an antibacterial fabric with a composite silk fabric layer, comprising the following steps: The base layer, composite silk fabric layer, antibacterial layer and functional layer are stacked in sequence and tightly bonded through high-temperature hot pressing process to ensure seamless connection between the layers; ultrasonic cleaning is then carried out to remove surface impurities to ensure the purity of the material; and finally ultraviolet sterilization treatment is carried out; 1. Preparation of composite silk fabric layer: The warp was dyed with the help of ultrasonic wave (frequency 40kHz, temperature 60℃, time 30min) using the extract of Galla chinensis; the weft was blended after being treated with low temperature plasma (power 200W, time 5min); After the warp and weft are blended, they are subjected to high-temperature setting treatment (temperature 180°C, time 15 minutes) to ensure the stability of the fiber structure; 2. Antibacterial coating: The nano silver ion solution was evenly sprayed on the surface of the composite silk fabric layer, and ultrasonic atomization technology (frequency 50kHz, pressure 0.5MPa) was used to ensure uniform coverage of the coating; then infrared drying (temperature 80℃, time 20min) was performed to solidify the silver ion coating; finally, the coating thickness was detected by electron microscopy to ensure that the thickness was within the range of 60nm to ensure a lasting antibacterial effect; 3. Functional layer composite: The bamboo charcoal-nanosilver composite aerogel (porosity 90%) was injected into a hot pressing mold and pressed with the silk fabric layer under a gradient temperature (80℃→120℃→150℃), a pressure of 10MPa, and a time of 20min to form a dense composite structure; then it was cold pressed to ensure close bonding between the layers; finally, the interface of the composite layer was detected by X-ray diffractometer to confirm that the interface bonding strength was ≥90MPa, ensuring that the functional layer was stable and durable; the overall material was washed and tested many times, and the antibacterial performance retention rate was ≥95%, and there was no residual odor, which met the national antibacterial material standards. Example

[0021] See also Figure 1-Figure 4 , and on the basis of Examples 1 and 2, further obtained: an antibacterial fabric with a composite silk fabric layer, comprising a base layer, a composite silk fabric layer and an antibacterial layer, wherein the composite silk fabric layer is formed by interweaving warp and weft, the antibacterial layer is coated on the surface of the composite silk fabric layer, and also comprises a functional layer, the functional layer is formed by a surface layer, an intermediate layer and a bottom layer, the base layer is composed of high-density fibers to provide strong support; the antibacterial layer is made of nano silver ion material, which can effectively inhibit the growth of bacteria; The warp is a blend of 40% mulberry silk and 60% cuprammonium fiber to improve flexibility and moisture conductivity, while the weft is a blend of 50% pearl fiber, 30% tea fiber, and 20% aloe fiber, which has both antibacterial and skin care functions. The surface layer is embedded with a three-dimensional breathable grid of nano-titanium dioxide fibers to achieve photocatalytic antibacterial properties, wherein the particle size of the nano-titanium dioxide fibers is 50nm; The middle layer has vertical air holes filled with bamboo charcoal fiber particles to physically absorb odor and microorganisms; the porosity of the bamboo charcoal particles in the middle layer is 90% and the particle size distribution is 200 μm; The bottom layer is a silver-plated fiber woven layer, which enhances long-lasting antibacterial properties through a contact killing mechanism, and the silver content is ≥98%.

[0022] Another technical problem to be solved by the present invention is to provide a method for preparing an antibacterial fabric with a composite silk fabric layer, comprising the following steps: The base layer, composite silk fabric layer, antibacterial layer and functional layer are stacked in sequence and tightly bonded through high-temperature hot pressing process to ensure seamless connection between the layers; ultrasonic cleaning is then carried out to remove surface impurities to ensure the purity of the material; and finally ultraviolet sterilization treatment is carried out; 1. Preparation of composite silk fabric layer: The warp yarn was dyed with the help of ultrasonic wave (frequency 40kHz, temperature 60℃, time 30min) using the extract of Galla chinensis; the weft yarn was blended after being treated with low temperature plasma (power 200W, time 5min); After the warp and weft are blended, they are subjected to high-temperature setting treatment (temperature 180°C, time 15 minutes) to ensure the stability of the fiber structure; 2. Antibacterial coating: The nano silver ion solution was evenly sprayed on the surface of the composite silk fabric layer, and ultrasonic atomization technology (frequency 50kHz, pressure 0.5MPa) was used to ensure uniform coating coverage; then infrared drying (temperature 80℃, time 20min) was performed to solidify the silver ion coating; finally, the coating thickness was detected by electron microscopy to ensure that the thickness was within 100nm to ensure a long-lasting antibacterial effect; 3. Functional layer composite: The bamboo charcoal-nanosilver composite aerogel (porosity 90%) was injected into a hot pressing mold and pressed with the silk fabric layer under a gradient temperature (80℃→120℃→150℃), a pressure of 10MPa, and a time of 20min to form a dense composite structure; then it was cold pressed to ensure close bonding between the layers; finally, the interface of the composite layer was detected by X-ray diffractometer to confirm that the interface bonding strength was ≥90MPa, ensuring that the functional layer was stable and durable; the overall material was washed and tested many times, and the antibacterial performance retention rate was ≥95%, and there was no residual odor, which met the national antibacterial material standards.

[0023] Performance Test: Antimicrobial properties (ISO 20743 standard): Initial antibacterial rate of bacteria Antibacterial rate after 50 washes Escherichia coli 99.8% 96.2% Staphylococcus aureus 99.5% 95.7% The bacteria reduction rate is significant, proving the material's durable antibacterial properties; after skin irritation testing, the result was non-irritating and suitable for underwear; the material has good breathability and is comfortable to wear, meeting daily protection needs.

[0024] Physical properties: Air permeability: 480 L / m² / s (GB / T 5453-1997); Breaking strength: 52N / cm in warp direction, 48N / cm in weft direction (GB / T 3923.1-2013) The wear resistance test shows that the material has no obvious damage after 1,000 frictions, and the color fastness is above level 4; it has excellent waterproof performance, and the contact angle is greater than 130°, meeting the application needs of multiple scenarios. After environmental protection testing, the material is non-toxic and harmless, meets international environmental protection standards, and can be widely used in medical, home and other fields.

[0025] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0026] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An antibacterial fabric with a composite silk fabric layer, comprising a base layer, a composite silk fabric layer and an antibacterial layer, wherein the composite silk fabric layer is interwoven with warp and weft, and the antibacterial layer is coated on the surface of the composite silk fabric layer, characterized in that: It also includes a functional layer, which is composed of a surface layer, a middle layer and a bottom layer. The base layer is composed of high-density fibers to provide strong support. The antibacterial layer is made of nano silver ion material to effectively inhibit bacterial growth.

2. The antibacterial fabric with a composite silk fabric layer according to claim 1, characterized in that: The warp is blended with 40% mulberry silk and 60% cuprammonia fiber to improve flexibility and moisture conductivity. The weft is blended with 50% pearl fiber, 30% tea fiber and 20% aloe fiber, and has both antibacterial and skin care functions.

3. The antibacterial fabric with a composite silk fabric layer according to claim 1, characterized in that: The surface layer is embedded with a three-dimensional breathable grid of nano-titanium dioxide fibers to achieve photocatalytic antibacterial properties, wherein the particle size of the nano-titanium dioxide fibers is 20-50nm.

4. The antibacterial fabric with a composite silk fabric layer according to claim 1, characterized in that: The middle layer has vertical air holes filled with bamboo charcoal fiber particles to physically absorb odor and microorganisms; the porosity of the bamboo charcoal particles in the middle layer is 85-90%, and the particle size distribution is 50-200 μm.

5. The antibacterial fabric with a composite silk fabric layer according to claim 1, characterized in that: The bottom layer is a silver-plated fiber woven layer, which enhances long-lasting antibacterial properties through a contact killing mechanism, and the silver content is ≥98%.

6. A method for preparing an antibacterial fabric with a composite silk fabric layer according to any one of claims 1 to 5, characterized in that: The following steps are included: The base layer, composite silk fabric layer, antibacterial layer and functional layer are stacked in sequence and tightly bonded through high-temperature hot pressing process to ensure seamless connection between the layers; ultrasonic cleaning is then carried out to remove surface impurities to ensure the purity of the material; and finally ultraviolet sterilization treatment is carried out; 1. Preparation of composite silk fabric layer: The warp yarn was dyed with the help of ultrasonic wave (frequency 40kHz, temperature 60℃, time 30min) using the extract of Galla chinensis; the weft yarn was blended after being treated with low temperature plasma (power 200W, time 5min); After the warp and weft are blended, they are subjected to high-temperature setting treatment (temperature 180°C, time 15 minutes) to ensure the stability of the fiber structure; 2. Antibacterial coating: The nano silver ion solution was evenly sprayed on the surface of the composite silk fabric layer, and ultrasonic atomization technology (frequency 50kHz, pressure 0.5MPa) was used to ensure uniform coating coverage; then infrared drying (temperature 80℃, time 20min) was performed to solidify the silver ion coating; finally, the coating thickness was detected by electron microscopy to ensure that the thickness was within the range of 50-100nm to ensure a lasting antibacterial effect; 3. Functional layer composite: The bamboo charcoal-nanosilver composite aerogel (porosity 90%) was injected into a hot pressing mold and pressed with the silk fabric layer at a gradient temperature (80℃→120℃→150℃) with a pressure of 10MPa for 20min to form a dense composite structure. It was then cold pressed to ensure close bonding between the layers. Finally, the interface of the composite layer was tested by an X-ray diffractometer to confirm that the interface bonding strength was ≥90MPa, ensuring that the functional layer was stable and durable. The overall material has been tested for multiple washings, and the antibacterial performance retention rate is ≥95%, with no residual odor, which meets the national antibacterial material standards.

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