Method for improving performance of stab-resistant cloth by using non-spherical particles
By applying non-spherical particle suspension on the sting fabric for coating treatment, the problem that existing sting materials are difficult to achieve low cost, lightweight, high comfort and safety while maintaining excellent performance, and efficient sting performance improvement and fabric flexibility are achieved.
Patent Information
- Application Number
- CN202411492343.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-24
- Publication Date
- 2025-03-11
AI Technical Summary
While maintaining excellent performance, existing stabbing materials are difficult to achieve the goals of low cost, lightweight, high comfort and safety. In particular, single-layer high-performance fiber fabrics cannot provide sufficient stabbing protection. Multiple layers of stacking are required to achieve effective protection, resulting in high manufacturing costs, increased weight and reduced flexibility.
By coating treatment using a non-spherical particle suspension, the non-spherical particles self-assemble on the fiber surface to form a single-layer, ordered and hard particle structure, which significantly enhances the friction between the fiber wires and thus improves the anti-spun properties of the fabric.
It achieves excellent anti-sting performance under a smaller number of layers, and has low raw materials, simple and environmentally friendly preparation process, and maintains good flexibility and flexibility of fabrics.
Smart Images
Figure CN119593219A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of stab-proof materials, and in particular to a method for improving the performance of stab-proof cloth by utilizing non-spherical particles. Background Art
[0002] With the continuous improvement of security requirements, the demand for bulletproof and stab-proof equipment in the military and civilian fields has become increasingly urgent. Currently, the stab-proof materials on the market can be divided into three categories according to their flexibility: hard, semi-hard and soft.
[0003] Hard stab-resistant materials: These materials are usually made of metal, ceramic or hard plastic in a specific shape to achieve their stab-resistant function. However, these materials often have disadvantages such as heavy weight, high hardness, bulky and uncomfortable to wear.
[0004] Semi-rigid stab-resistant materials: They are generally made of metal sheets or metal rings riveted or ringed, or made of metal or ceramic plates embedded in fabric. Although these materials provide a certain degree of protection, they still have weight problems and lack of integrity.
[0005] Soft stab-resistant materials: These materials are mainly made of high-performance fibers (such as aramid, ultra-high molecular weight polyethylene, PBO, polyester and carbon fiber, etc.) or non-woven fabrics. These fibers are known for their high strength, high modulus and low density. They not only solve the weight and wearing comfort problems of hard and semi-hard materials, but also provide good flexibility, significantly improving the freedom of movement and comfort of the wearer.
[0006] However, in research and application, it is found that a single layer of high-performance fiber fabrics often cannot provide sufficient anti-stab protection, and multiple layers are required to achieve effective protection. This not only increases the manufacturing cost, but also increases the weight and thickness of the product, reduces the flexibility of the fabric, and affects the flexibility and comfort of the wearer. Although the stab resistance of the fabric can be improved by increasing the strength of the yarn or increasing the weaving density, these methods are costly and have strict processing requirements, making them difficult to be widely used.
[0007] Therefore, how to reduce the number of fabric layers while maintaining the excellent performance of stab-proof materials to achieve the goals of low cost, light weight, high comfort and safety has become the focus and challenge of research in academia and industry. Summary of the invention
[0008] The purpose of the present invention is to provide a method for improving the performance of stab-proof fabric by using non-spherical particles in order to solve the above problems. The present invention improves the overall performance of stab-proof fabric by using non-spherical particles. By applying the method of the present invention, the obtained stab-proof fabric has only a small increase in surface density compared with the unmodified fabric, good flexibility, and strong flexibility, and the fabric can obtain excellent stab-proof performance with a small number of layers.
[0009] The present invention achieves the above-mentioned purpose through the following technical solutions:
[0010] A method for improving the performance of stab-proof fabric by using non-spherical particles comprises the following steps:
[0011] Step (1) Preparation of non-spherical particle suspension: adding an appropriate amount of non-spherical particles to the solution, and ultrasonically dispersing for 5 min-2 h to obtain a uniform non-spherical particle suspension;
[0012] Step (2) Preparation of coated stab-proof fabric:
[0013] Method 1: Use a scraper to evenly apply the non-spherical particle suspension prepared in step (1) on the surface of the stab-proof cloth, and dry it naturally at room temperature to obtain a non-spherical particle coated stab-proof cloth;
[0014] Method 2: Place the stab-proof fabric in a vacuum filtration device, then pour an appropriate amount of the non-spherical particle suspension prepared in step (1) onto the upper surface of the fabric, perform vacuum filtration, remove excess water, and dry naturally at room temperature to obtain a non-spherical particle coated stab-proof fabric.
[0015] A further solution is that the non-spherical particles in step (1) include one or more of silica nanorods, rough silica particles, graphene sheets, graphite sheets, montmorillonite, silicon carbide nanorods, carbon nanotubes, zinc oxide nanowires, starch particles, polystyrene rods, and polystyrene ellipsoids; and the mass percentage of the particles in the suspension is 0.01%-70%.
[0016] A further solution is that the solution in step (1) is distilled water and ethanol, and a small amount of sodium dodecyl sulfate, polyvinyl pyrrolidone, polyethylene oxide, etc. may be added to promote the dispersion of particles; the amount of these dispersants added does not exceed 1% of the mass of the suspension.
[0017] A further solution is that the stab-proof fabric in step (2) is one or both of high-strength fiber woven fabric and high-strength fiber non-woven fabric; the high-strength fiber woven fabric is one or more of ultra-high molecular weight polyethylene fabric, aramid fabric, and poly(p-phenylene benzobisoxazole) fabric; the high-strength fiber non-woven fabric is one of aramid non-woven fabric, ultra-high molecular weight polyethylene non-woven fabric, and superimposed aramid and ultra-high molecular weight polyethylene non-woven fabric.
[0018] A further embodiment is that the coating amount in step (2) is 1 to 100 g / m 2 .
[0019] A further solution is that the coating method described in method 1 in step (2) is single coating or double coating, and the double coating is single-sided double-layer coating or double-sided single-layer coating.
[0020] Another aspect of the present invention provides a stab-proof cloth coated with non-spherical particles obtained by the above method.
[0021] Another aspect of the present invention provides a stab-proof core layer, which is formed by laminating the above-mentioned stab-proof fabrics of the same or different types, or by laminating the above-mentioned stab-proof fabrics of the same or different types and untreated fabrics.
[0022] A further solution is that the number of stacked layers is 10-80 layers.
[0023] Another aspect of the present invention also provides the use of the non-spherical particle coated stab-proof cloth obtained by the above method; or the use of the above stab-proof core layer.
[0024] The beneficial effects of the present invention are:
[0025] The present invention discloses a method for improving the performance of stab-proof fabric by using non-spherical particles. The particles are anisotropic in shape and are passed through water evaporation and vacuum-assisted filtration to promote self-assembly on the fiber surface. The non-spherical particles form a single-layer, ordered, and hard particle structure on the fiber surface, and the particles and the fibers have good interface interaction. Different from the common coating method, this method only needs to add a small amount of non-spherical particles to significantly improve the friction between the fiber filaments, thereby improving the stab-proof performance of the fabric.
[0026] The raw materials used in the invention are low-cost, the preparation process is simple and environmentally friendly, and the invention has broad application prospects in the field of flexible and lightweight protective materials. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0028] Figure 1 This is a scanning electron microscope micrograph of the graphene sheet of the present invention.
[0029] Figure 2 These are digital camera pictures of the ultra-high molecular weight polyethylene woven fabric of the present invention before and after graphene self-assembly.
[0030] Figure 3 The microstructure pictures are of the ultra-high molecular weight polyethylene fiber (ac) of the present invention and the ultra-high molecular weight polyethylene fiber (df) after graphene self-assembly.
[0031] Figure 4 (a) Schematic diagram of the fiber extraction test of the present invention, and (b) the variation curve of the extraction force between fibers before and after graphene self-assembly. DETAILED DESCRIPTION
[0032] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.
[0033] Example 1
[0034] (1) Preparation of non-spherical particle suspension: 10 wt.% of silicon carbide nanowires and 1 wt.% of polyvinyl pyrrolidone were added to a distilled water solution and ultrasonically dispersed for 10 min to obtain a uniformly dispersed silicon carbide particle suspension.
[0035] (2) Preparation of coated stab-proof cloth: 8 mL of the silicon carbide particle suspension prepared in step (1) was evenly applied on a 30 cm x 30 cm ultra-high molecular weight polyethylene woven cloth (surface density 170 g / m 2 ) on the upper surface and naturally dried at room temperature to obtain a stab-proof cloth coated with silicon carbide particles.
[0036] Example 2
[0037] (1) Preparation of non-spherical particle suspension: 10 wt.% of silicon carbide nanowires and 1 wt.% of polyvinyl pyrrolidone were added to a distilled water solution and ultrasonically dispersed for 10 min to obtain a uniformly dispersed silicon carbide particle suspension.
[0038] (2) Preparation of coated stab-proof fabric: 8 ml of the silicon carbide particle suspension prepared in step (1) was evenly applied to a 30 cm x 30 cm ultra-high molecular weight polyethylene non-woven fabric (surface density of 150 g / m 2 ) on the upper surface and naturally dried at room temperature to obtain a stab-proof cloth coated with silicon carbide particles.
[0039] Example 3
[0040] (1) Preparation of non-spherical particle suspension: 5 wt.% of silicon carbide nanowires and 1 wt.% of polyvinyl pyrrolidone were added to a distilled water solution and ultrasonically dispersed for 10 min to obtain a uniformly dispersed silicon carbide particle suspension.
[0041] (2) Preparation of coated stab-proof fabric: Use a scraper to evenly apply 16 ml of the silicon carbide particle suspension prepared in step (1) onto a 30 cm x 30 cm ultra-high molecular weight polyethylene non-woven fabric (surface density 150 g / m 2 ) on the upper and lower surfaces and dried naturally at room temperature to obtain a stab-proof cloth coated with silicon carbide particles.
[0042] Example 4
[0043] (1) Preparation of non-spherical particle suspension: 5 wt.% carbon nanotubes and 1 wt.% sodium dodecyl sulfate were added to a distilled water solution and ultrasonically dispersed for 10 min to obtain a uniformly dispersed carbon nanotube suspension.
[0044] (2) Preparation of coated stab-proof fabric: Use a scraper to evenly apply 16 ml of the carbon nanotube suspension prepared in step (1) onto a 30 cm x 30 cm ultra-high molecular weight polyethylene non-woven fabric (surface density 150 g / m 2 ) on the upper and lower surfaces and dried naturally at room temperature to obtain a carbon nanotube particle coated stab-proof cloth.
[0045] Example 4
[0046] (1) Preparation of non-spherical particle suspension: 5 wt.% graphene (such as Figure 1 ) was added to a distilled water solution and ultrasonically dispersed for 30 min to obtain a uniformly dispersed graphene suspension. The concentration of the graphene solution was adjusted by controlling the content of distilled water.
[0047] (2) Preparation of coated stab-proof fabric: Use a scraper to evenly apply 20 ml of the graphene suspension prepared in step (1) on a 30 cm x 30 cm ultra-high molecular weight polyethylene woven fabric (surface density of 200 g / m 2 ) on the upper surface and naturally dried at room temperature to obtain a graphene particle coated stab-proof cloth.
[0048] Pictures of ultra-high molecular weight polyethylene woven fabric before and after graphene treatment Figure 2 As shown. After coating, the sample changed from white to black. Through field emission scanning electron microscopy, it was found that the surface of the ultra-high molecular weight polyethylene fiber was very smooth before graphene coating ( Figure 3 ac); after graphene self-assembly, a large number of graphene sheets are adsorbed on the fiber surface ( Figure 3df). Through the fiber extraction test, it was found that the extraction force between the coated fibers increased from 3.9N to 15.86N ( Figure 4 ). This shows that graphene effectively increases the friction between fibers, which is conducive to the transfer of stress. It turns out that after graphene coating, the puncture resistance of the fabric is indeed enhanced, and the maximum puncture resistance is increased by about 34%.
[0049] Example 5
[0050] (1) Preparation of non-spherical particle suspension: 5 wt.% of graphene was added to a distilled water solution and ultrasonically dispersed for 30 min to obtain a uniformly dispersed graphene suspension.
[0051] (2) Preparation of coated stab-proof fabric: Use a scraper to evenly apply 20 ml of the graphene suspension prepared in step (1) on a 30 cm x 30 cm aramid woven fabric (surface density 200 g / m 2 ) on the upper surface of the aramid fiber and dried naturally at room temperature to obtain a graphene particle coated stab-proof cloth. After natural drying, the single piece of graphene is firmly adsorbed on the surface of the aramid fiber to form a tight coating structure, which is conducive to improving the friction between the fibers. Before and after the graphene coating, the surface density of the woven fabric did not change significantly, only from 200g / m 2 Slightly increased to 200.5g / m 2 In addition, its flexibility and breathability have not changed significantly.
[0052] Example 6
[0053] (1) Preparation of non-spherical particle suspension: 10 wt. % of silica nanorods were added to a distilled water solution and ultrasonically dispersed for 30 min to obtain a uniformly dispersed silica nanorod suspension.
[0054] (2) Preparation of coated stab-proof fabric: 10 ml of the silica nanorod suspension prepared in step (1) was evenly applied to a 30 cm x 30 cm ultra-high molecular weight polyethylene woven fabric (surface density of 200 g / m2) using a scraper. 2 ) on the upper surface and naturally dried at room temperature to obtain a stab-proof cloth coated with silicon dioxide nanorods.
[0055] Example 7
[0056] (1) Preparation of non-spherical particle suspension: 15 wt. % of silica nanorods were added to a distilled water solution and ultrasonically dispersed for 30 min to obtain a uniformly dispersed silica nanorod suspension.
[0057] (2) Preparation of coated stab-proof fabric: 40 ml of the silica nanorod suspension prepared in step (1) was evenly applied on a 30 cm x 30 cm aramid woven fabric (surface density 200 g / m 2 ) on the upper and lower surfaces and dried naturally at room temperature to obtain a stab-proof cloth coated with silicon dioxide nanorods.
[0058] Example 8
[0059] (1) Preparation of non-spherical particle suspension: 5 wt.% of silica nanorods were added to a distilled water solution and ultrasonically dispersed for 30 min to obtain a uniformly dispersed silica nanorod suspension.
[0060] (2) Preparation of coated stab-proof cloth: 20 ml of the silica nanorod suspension prepared in step (1) was evenly applied to a 30 cm x 30 cm ultra-high molecular weight polyethylene non-woven cloth (surface density of 50 g / m 2 ) on the upper surface and naturally dried at room temperature to obtain a stab-proof cloth coated with silicon dioxide nanorods.
[0061] Example 9
[0062] (1) Preparation of non-spherical particle suspension: 5 wt.% of silica nanorods were added to a distilled water solution and ultrasonically dispersed for 30 min to obtain a uniformly dispersed silica nanorod suspension.
[0063] (2) Preparation of coated stab-proof fabric: Place an ultra-high molecular weight polyethylene woven fabric in a vacuum filtration device covered with a microporous filter membrane, then pour 20 mL of the silica nanorod suspension prepared in step (1) onto the upper surface of the fabric, perform vacuum filtration, remove excess water, and dry naturally at room temperature to obtain a silica nanorod coated stab-proof fabric.
[0064] Example 10
[0065] (1) Preparation of non-spherical particle suspension: 5 wt.% of graphene was added to a distilled water solution and ultrasonically dispersed for 30 min to obtain a uniformly dispersed graphene suspension.
[0066] (2) Preparation of coated stab-proof cloth: An ultra-high molecular weight polyethylene woven fabric is placed in a vacuum filtration device covered with a microporous filter membrane, and then 20 mL of the graphene suspension prepared in step (1) is poured onto the upper surface of the fabric, and vacuum filtration is performed to remove excess water, and then naturally dried at room temperature to obtain a graphene coated stab-proof cloth.
[0067] Embodiment 11
[0068] (1) Preparation of non-spherical particle suspension: 2.5 wt.% of graphene was added to a distilled water solution and ultrasonically dispersed for 30 min to obtain a uniformly dispersed graphene suspension.
[0069] (2) Preparation of coated stab-proof cloth: An ultra-high molecular weight polyethylene woven fabric is placed in a vacuum filtration device covered with a microporous filter membrane, and then 40 mL of the graphene suspension prepared in step (1) is poured onto the upper surface of the fabric in two portions, and vacuum filtration is performed to remove excess water, and then the fabric is naturally dried at room temperature to obtain a graphene coated stab-proof cloth.
[0070] Example 12
[0071] (1) Preparation of non-spherical particle suspension: 10 wt. % zinc oxide nanowires were added to a distilled water solution and ultrasonically dispersed for 30 min to obtain a uniformly dispersed zinc oxide nanowire suspension.
[0072] (2) Preparation of coated stab-proof fabric: The super-aramid woven fabric is placed in a vacuum filtration device covered with a microporous filter membrane, and then 30 mL of the zinc oxide nanowire suspension prepared in step (1) is poured onto the upper surface of the fabric, and vacuum filtration is performed to remove excess water, and then the fabric is naturally dried at room temperature to obtain a zinc oxide nanowire coated stab-proof fabric.
[0073] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or replacements within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims. It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further explain various possible combinations. In addition, the various different embodiments of the present invention can also be combined arbitrarily, as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.
Claims
1. A method for improving the performance of stab-proof fabric using non-spherical particles, characterized in that: The following steps are involved: Step (1) Preparation of non-spherical particle suspension: adding an appropriate amount of non-spherical particles to the solution, and ultrasonically dispersing for 5 min-2 h to obtain a uniform non-spherical particle suspension; Step (2) Preparation of coated stab-proof fabric: Method 1: Use a scraper to evenly apply the non-spherical particle suspension prepared in step (1) on the surface of the stab-proof cloth, and dry it naturally at room temperature to obtain a non-spherical particle coated stab-proof cloth; Method 2: Place the stab-proof fabric in a vacuum filtration device, then pour an appropriate amount of the non-spherical particle suspension prepared in step (1) onto the upper surface of the fabric, perform vacuum filtration, remove excess water, and dry naturally at room temperature to obtain a non-spherical particle coated stab-proof fabric.
2. The method for improving the performance of stab-proof fabric by using non-spherical particles according to claim 1, characterized in that: The non-spherical particles in step (1) include one or more of silicon dioxide nanorods, rough silicon dioxide particles, graphene sheets, graphite sheets, montmorillonite, silicon carbide nanorods, carbon nanotubes, zinc oxide nanowires, starch particles, polystyrene rods, and polystyrene ellipsoids; the mass percentage of the particles in the suspension is 0.01%-70%.
3. The method for improving the performance of stab-proof fabric by using non-spherical particles according to claim 1, characterized in that: The solution in step (1) is distilled water and / or ethanol; or further comprises sodium lauryl sulfate, polyvinyl pyrrolidone, and polyethylene oxide in an amount not exceeding 1% by mass of the suspension.
4. The method for improving the performance of stab-proof fabric by using non-spherical particles according to claim 1, characterized in that: In the step (2), the stab-proof fabric is one or both of high-strength fiber woven fabric and high-strength fiber non-woven fabric; the high-strength fiber woven fabric is one or more of ultra-high molecular weight polyethylene fabric, aramid fabric, and poly(p-phenylene benzobisoxazole) fabric; the high-strength fiber non-woven fabric is one of aramid non-woven fabric, ultra-high molecular weight polyethylene non-woven fabric, and superimposed aramid and ultra-high molecular weight polyethylene non-woven fabric.
5. The method for improving the performance of stab-proof fabric by using non-spherical particles according to claim 1, characterized in that: The coating amount in step (2) is 1 to 100 g / m 2 .
6. The method for improving the performance of stab-proof fabric by using non-spherical particles according to claim 1, characterized in that: The coating method described in method 1 in step (2) is single coating or double coating, and the double coating is single-sided double-layer coating or double-sided single-layer coating.
7. A stab-proof cloth coated with non-spherical particles obtained by the method according to any one of claims 1 to 5.
8. A stab-proof core layer, characterized in that: The method is formed by laminating the same or different types of stab-proof fabrics as described in claim 7, or laminating the same or different types of stab-proof fabrics as described in claim 7 and untreated fabrics.
9. The stab-resistant core layer according to claim 8, characterized in that: The number of layers stacked is 10-80.
10. Use of a stab-proof cloth coated with non-spherical particles obtained by the method according to any one of claims 1 to 5; or use of a stab-proof core layer according to any one of claims 7 to 8.