High-strength three-dimensional protective cloth with multi-layer warp knitting structure

Abstract

A high-strength three-dimensional protective fabric of a multi-layer warp knitting structure comprises a supporting breathable layer and a protective layer, a fabric integrated in the thickness direction is formed between the supporting breathable layer and the protective layer in a warp knitting mode, and the protective layer is made of high-strength protective fabric fibers. According to the three-dimensional cloth, the supporting breathable layer and the protective layer are sequentially arranged in the thickness direction, the supporting breathable layer has an elastic space in the thickness direction, and the protective layer is made of high-strength fibers in a warp knitting mode and forms an implicit structure in the thickness and plane two-dimensional direction; a multi-layer warp knitting fabric obtained by a three-dimensional mutually-buckled composite structure formed by warp knitting is adopted between the supporting breathable layer and the protective layer, and the comprehensive bulletproof and anti-channeling performance of the multi-layer warp knitting fabric is superior to that of a multi-layer plane woven fabric adopted by a conventional bulletproof vest. The skin-attaching layer is arranged on the outer side of the supporting breathable layer, so that the bulletproof fabric has an excellent bulletproof effect, has breathable and sweat-absorbing functions, is light and comfortable, and ensures the flexible combat ability of a wearer.

Description

Technical Field

[0001] The invention relates to the field of protection such as bulletproof vests, and in particular to basic fabrics of protective products such as bulletproof vests. Background Art

[0002] Stab-proof bulletproof vests are a type of personal protective textiles used to protect the human body from damage caused by bullets or shrapnel. The bulletproof vests must not only effectively resist the penetration of bullets and shrapnel, but also absorb the kinetic energy of the projectile to the maximum extent, reduce blunt injuries to the human body, and have good wearing performance. They are light and comfortable, ensuring the wearer's flexible combat capability.

[0003] Bulletproof vests are one of the most important personal protection products, including stab-proof vests and bullet-proof vests. Stab-proof vests are also called knife-proof vests, blade-proof vests or blade-proof vests. They have the functions of preventing knife cuts, knife slashes, knife stabs, scratches with angular objects, wear resistance, and theft prevention. Knife-proof vests can protect the wearer from cuts, scratches, rubs, and slashes when worn or cut, chopped, scraped, rubbed, or scratched by a sharp knife (sharp blade, sharp object, etc.).

[0004] Bulletproof vests, also known as bulletproof vests, bulletproof vests, bulletproof suits, individual body protection equipment, etc., are used to protect the human body from damage caused by bullets or shrapnel. Bulletproof vests are mainly composed of two parts: a cover and a bulletproof layer. The cover is usually made of chemical fiber fabrics. The bulletproof layer is made of metal (special steel, aluminum alloy, titanium alloy), ceramic sheets (corundum, boron carbide, silicon carbide, aluminum oxide), fiberglass, nylon (PA), Kevlar (KEVLAR), ultra-high molecular weight polyethylene fiber, liquid protective materials and other materials to form a single or composite protective structure. The bulletproof layer can absorb the kinetic energy of bullets or shrapnel, has a significant protective effect on low-speed bullets or shrapnel, and can reduce damage to the chest and abdomen of the human body under certain conditions of controlling the depression.

[0005] Bulletproof vests are used to protect the main parts of the human body from being hurt by bullets or shrapnel, and to prevent bullets or shrapnel from causing harm to the human body. They are mainly used by the military, armed police and law enforcement personnel. Bulletproof vests not only need to have excellent ballistic performance and be able to effectively resist the penetration of bullets and shrapnel, but also need to absorb the kinetic energy of the projectile to the maximum extent and reduce blunt trauma to the human body. At the same time, they must also be lightweight and reduce restrictions on human activities, thereby ensuring that the wearer is flexible in movement, has sufficient mobility and combat capability, and at the same time, bulletproof vests must also meet the requirements of wearing comfort and reduce the wearer's fatigue and physical energy consumption.

[0006] Existing bulletproof vests are divided into three types according to the bulletproof material: soft bulletproof vests, hard bulletproof vests and soft-hard composite bulletproof vests. Regardless of the type of bulletproof vest, its most basic material is bulletproof fabric. Under the premise of meeting the same protective performance, soft bulletproof vests have become people's first choice due to their unique advantages, and they are also the most innovative and development-oriented.

[0007] "Lightweight Bulletproof Textiles" published by China Textile Press Co., Ltd. 2023.11ISBN978-75229-0796-3 introduces in detail the current status of existing bulletproof textiles and the bulletproof properties of various bulletproof textiles. Among the existing bulletproof textiles, all are flat textile fabrics, and all are woven fabrics. The bulletproof performance of this type of fabric depends entirely on the strength of the fiber itself. The warp fibers and weft fibers in the bulletproof fabric are formed in a "well" weaving manner. When penetrated by high-speed bullets, they can only rely on the elastic blocking of densely woven bulletproof fibers. When the impact kinetic energy of the bullet is greater than the ultimate strength of the bulletproof fiber, the fabric will be penetrated. When the bullet hits the well-shaped grid formed by adjacent fibers, the bulletproof fiber has almost no blocking effect on the speeding bullet.

[0008] A composite multi-layer stab-proof and bullet-proof cloth sheet and its preparation method are disclosed in application number CN202110770703.2. The stab-proof and bullet-proof cloth sheet is woven and composited by high-performance fibers such as ultra-high molecular weight polyethylene fiber, aramid fiber, carbon fiber, PBO fiber, and a small amount of elastomeric fiber; the elastomeric fiber adopts polybutylene terephthalate fiber filament; the preparation method comprises taking ultra-high molecular weight polyethylene fiber, aramid fiber, carbon fiber, PBO fiber, and a small amount of polybutylene terephthalate fiber filament and evenly blending them and then hot pressing them. Hot pressing and gluing after blending is conducive to increasing the structure. At the same time, the uniform blending of different types of fiber filaments can enhance the overall structural performance of the stab-proof and bullet-proof cloth sheet, reduce the overall mass density of the stab-proof and bullet-proof cloth sheet, and increase the toughness, shaping, elasticity and other properties, which can improve the comfort and flexibility of wearing and use, and adapt to the use of security operations.

[0009] Although the composite multi-layer stab-proof and bullet-proof fabric has better stab-proof and bullet-proof performance than other woven bullet-proof fabrics, it is still a single-layer composite fabric. Its stab-proof and bullet-proof performance still depends on the overall stab-proof and bullet-proof strength of the textile fiber and the composite adhesive along the direction of the bullet's flight, but has no blocking performance in the two-dimensional space within the plane. At the same time, this type of fabric is not breathable and has extremely poor heat dissipation. The air permeability and heat dissipation performance of bulletproof vests made of this fabric are extremely poor, and it does not have the sweat absorption function. At the same time, the softness, lightness, and combat flexibility of this fabric after wearing it are not ideal. More importantly, its stab-proof and bullet-proof performance cannot meet people's requirements.

[0010] In order to overcome the shortcomings of existing stab-proof and bullet-proof fabrics, reduce the weight of stab-proof and bullet-proof clothing as much as possible while ensuring stab-proof and bullet-proof performance, improve breathability and sweat absorption, and improve combat flexibility after wearing, the applicant proposed a high-strength three-dimensional protective fabric with a multi-layer warp knitted structure. Summary of the invention

[0011] The technical solution adopted by the present invention is as follows: A high-strength three-dimensional protective fabric with a multi-layer warp knitted structure, comprising a protective layer, a supporting breathable layer and a skin-contacting layer. The protective layer is a warp knitted protective fabric, and the protective layer and the skin-contacting layer are respectively arranged on both sides of the supporting breathable layer. An integrated woven structure is formed in the thickness direction between the protective layer, the supporting breathable layer and the skin-contacting layer by warp knitting.

[0012] The protective layer comprises a basic warp knitted fabric layer and an overlay warp knitted fabric layer, and the overlay warp knitted fabric layer and the basic warp knitted fabric layer are connected in a warp knitted connection structure or a physical overlay composite structure.

[0013] Furthermore, the high-strength bulletproof warp knitting raw material fibers used in the basic warp knitting layer and the superimposed warp knitting layer in the protective layer are the same or different.

[0014] Furthermore, the superimposed warp knitted fabric layer includes a high-density impact-resistant warp knitted layer and a mosquito-repellent warp knitted layer.

[0015] Furthermore, the fibers used in the mosquito-repellent warp-knitted layer have mosquito-repellent properties or mosquito-repellent drugs are provided in the mosquito-repellent warp-knitted layer.

[0016] Furthermore, the connection between the stacked warp knitted layers is a warp knitted connection structure or a physical stacked composite structure.

[0017] Furthermore, the material of the protective layer is one of ultra-high molecular weight polyethylene UHMWPE fiber (Kevlar), aramid, para-aramid, aramid II, aramid III or a combination thereof.

[0018] Furthermore, the material of the skin-contacting layer is the same as that of the protective layer, both of which are high-strength protective fabric fibers.

[0019] Since the present invention sequentially provides a protective layer, a supporting breathable layer with elastic function and a skin-contacting layer in the thickness direction, the protective layer is a multi-layer high-strength bulletproof cloth formed by warp knitting of high-strength protective fabric fibers, and the supporting breathable layer is a three-dimensional warp knitted structure formed by warp knitting with common materials such as polypropylene in the thickness direction respectively between the skin-contacting layer and the protective layer. The present invention is a three-dimensional warp knitted multi-layer protective layer woven by high-strength bulletproof fibers through warp knitting, a supporting breathable layer fabric formed by ordinary fibers, and a skin-contacting layer woven by skin-contacting fibers, all of which are integrated fabrics formed by warp knitting, wherein the high-strength fiber warps in the protective layer are fixed to each other by loop-knitting buckle connection, forming a fishnet structure in the two-dimensional plane direction, and also a dense mesh structure in the thickness direction. When the bullet impacts the protective layer, when the tip of the bullet head flying at high speed shoots toward the outermost protective layer, the bullet head is either located in a "well" grid surrounded by warp knitting loop nodes, or contacts the warp. In the process of releasing kinetic energy when the bullet contacts the present invention, the bullet head will be blocked by multiple high-strength fibers, and the bullet body will be blocked. The surrounding side walls are wrapped by the high-strength fiber grid bundles of fixed length to block and consume the kinetic energy of the bullet. Since the length between the four knots of the high-strength fiber around each grid of the protective layer fishnet structure is fixed, the length of the high-strength bulletproof fiber is expanded and stretched when the bullet passes through, and the extrusion force generated on the bullet body gradually increases, and the resistance to the passage of the entire bullet body continues to increase. Moreover, the entire protective layer is a multi-layer warp knitting structure. The bullet head and the bullet body are subjected to the cross blocking and extrusion damping of the multi-layer high-strength bulletproof fiber in the two-dimensional space of the plane, and are subjected to the elastic release of the supporting breathable layer 2 of the warp knitting structure in the thickness direction. Under the three-dimensional composite blocking and elastic release, the kinetic energy stored by the high-speed flying bullet is released in a short distance, thereby achieving efficient blocking of the bullet, that is, achieving bulletproof performance. The role of setting the supporting breathable layer can also make the bulletproof fabric have good air permeability, and improve the comfort of wearing the bulletproof vest.

[0020] It is particularly important to note that after the bullet enters the high-strength fiber of the protective layer, the bullet is compressed and wrapped by the grid fibers in the fishnet structure. Since the four points of the grid are knitted buckle points, the side walls of the bullet are wrapped by high-strength elastic fibers, and the kinetic energy of the bullet is released layer by layer. When the bullet is directly blocked and clamped by the multiple protective layers, the supporting breathable layer further compresses the bullet along the thickness direction, further reducing the kinetic energy of the bullet. In this way, the kinetic energy of the high-speed bullet is released step by step under the comprehensive damping formed by the layer-by-layer blocking and wrapping of the combination of the protective layer and the supporting breathable layer with the smallest thickness, thereby achieving the goal of preventing bullets or shrapnel from penetrating and injuring people with high-strength bulletproof fabric of the smallest thickness.

[0021] Providing a skin-contacting layer on the inner side of the supporting breathable layer can not only further improve the wearing comfort of people, but also increase the ventilation and perspiration functions. The bulletproof vest made of this multi-layer warp-knitted high-strength three-dimensional protective fabric is used to protect the main parts of the human body. It can not only effectively resist the transmission of bullets and shrapnel, but also absorb the kinetic energy of the projectile to the maximum extent, reduce blunt injuries to the human body, and eliminate the damage to the human body caused by bullets or shrapnel, but also meet the lightweight requirements of the bulletproof vest, reduce restrictions on human activities, improve the flexibility of the wearer's actions, ensure the mobility and combat capability of the wearer, and also meet the comfort requirements of the wearer of the bulletproof vest, and reduce the wearer's fatigue and physical energy consumption.

[0022] This multi-layer warp knitted structure of high-strength three-dimensional protective fabric has a skin-fitting layer, a supporting breathable layer and a protective layer arranged in sequence in the thickness direction, wherein the skin-fitting layer is a fiber fabric that feels comfortable to the body, the supporting breathable layer is an elastic supporting breathable fabric, the protective layer is a high-strength bulletproof fiber warp knitted fabric, and the skin-fitting layer, the supporting breathable layer and the protective layer are formed by warp knitting to form a three-dimensional interlocking composite structure to obtain a multi-layer warp knitted fabric, which has better comprehensive bulletproof and anti-channeling performance than existing bulletproof vest fabrics, and at the same time has protectiveness, breathability, lightness and comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the fiber woven structure in the existing bulletproof vest fabric; Figure 2 It is a structural schematic diagram of the present invention; Figure 3 A schematic diagram of the structure of the protective layer.

[0024] In the figure: 1-protective layer; 2-supporting breathable layer; 3-skin-contacting layer; 11-basic warp knitting layer; 12-superimposed warp knitting layer; 121-high-density impact-resistant warp knitting layer; 122-mosquito-repellent warp knitting layer; 123-Mosquito repellent. DETAILED DESCRIPTION

[0025] The following structural drawings illustrate specific implementations of the present invention: Embodiment 1: A high-strength three-dimensional protective fabric with a multi-layer warp knitted structure, such as Figure 3As shown, it includes a protective layer 1, a supporting breathable layer 2 and a skin-fitting layer 3, wherein the skin-fitting layer 3 and the protective layer 1 are respectively arranged on both sides of the supporting breathable layer 2, and the three form an integrated bulletproof fabric cloth in the thickness direction by warp knitting knots, wherein the protective layer 1 is a multi-layer high-strength protective fabric, and the protective layer 1 includes a basic warp knitting layer 11 and four superimposed warp knitting layers 12, and between the basic warp knitting layer 11 and the superimposed warp knitting layer 12, and between the superimposed warp knitting layers 12 of each layer are connected structures formed by warp knitting of high-strength protective fibers, and the material of the protective layer 1 is one of ultra-high molecular weight polyethylene UHMWPE fiber (Kevlar), aramid, para-aramid, aramid II, aramid III or a combination thereof, the supporting breathable layer 2 is a supporting breathable structure formed by warp knitting of polypropylene fibers, and the raw material of the skin-fitting layer 3 is the existing skin-fitting fiber and the supporting breathable layer 2 are connected together by warp knitting, and the protective layer 1 and the supporting breathable layer 2 are also connected together by warp knitting.

[0026] Embodiment 2: In embodiment 1, the stacked warp knitted layer 12 includes three layers of high-density impact-resistant warp knitted layers 121 and one layer of mosquito-repellent warp knitted layer 122. The fibers used in the mosquito-repellent warp knitted layer 122 are fibers with mosquito-repellent properties. Mosquito-repellent drugs 123 may also be provided in the mosquito-repellent warp knitted layer 122. Bulletproof vests made of such fabrics can repel mosquitoes.

[0027] Embodiment 3: The difference from Embodiment 1 is that: The protective layer 1 and the supporting breathable layer 2 are connected by a warp knitting structure, while the skin-contacting layer 3 and the supporting breathable layer 2 are connected by a physical superposition composite structure. The ballistic performance of this structure is worse than that of the all-warp knitting connection structure of Example 1.

[0028] Embodiment 4: The difference from Embodiment 1 is that: The high-strength bulletproof warp knitting raw material fiber materials used in the basic warp knitting layer 11 and the superimposed warp knitting layer 12 in the protective layer 1 are different.

[0029] Embodiment 5: As a special example of embodiment 1, the skin-contacting layer 3 is removed. Such a structure not only has poor wearing comfort, but also has reduced ballistic performance.

[0030] In the above examples, the material of the skin-contacting layer 3 can be a fiber with good body feel, or can be a high-strength protective fabric fiber similar to that of the protective layer 1 .

Claims

1. A high-strength three-dimensional protective fabric with a multi-layer warp knitted structure, characterized by: The invention comprises a protective layer (1), a supporting breathable layer (2) and a skin-contacting layer (3); the protective layer (1) is a warp-knitted protective fabric; the protective layer (1) and the skin-contacting layer (3) are respectively arranged on both sides of the supporting breathable layer (2); and an integrated woven structure is formed in the thickness direction between the protective layer (1), the supporting breathable layer (2) and the skin-contacting layer (3) by warp-knitting.

2. According to claim 1, the high-strength three-dimensional protective fabric with a multi-layer warp knitted structure is characterized by: The protective layer (1) comprises a basic warp knitted fabric layer (11) and a superimposed warp knitted fabric layer (12), and the superimposed warp knitted fabric layer (12) and the basic warp knitted fabric layer (11) are connected in a warp knitted connection structure or a physically superimposed composite structure.

3. The high-strength three-dimensional protective fabric with a multi-layer warp knitted structure according to claim 2, characterized in that: The high-strength bulletproof warp knitting raw material fibers used in the basic warp knitting layer (11) and the superimposed warp knitting layer (12) in the protective layer (1) are the same.

4. The high-strength three-dimensional protective fabric with a multi-layer warp knitted structure according to claim 2, characterized in that: The superimposed warp knitted fabric layer (12) comprises a high-density impact-resistant warp knitted layer (121) and a mosquito-repellent warp knitted layer (122).

5. The high-strength three-dimensional protective fabric with a multi-layer warp knitted structure according to claim 4, characterized in that: The fibers used in the mosquito-repellent warp-knitted layer (122) have mosquito-repellent properties, or mosquito-repellent drugs (123) are provided in the mosquito-repellent warp-knitted layer (122).

6. The high-strength three-dimensional protective fabric with a multi-layer warp knitted structure according to claim 2, characterized in that: The connection between the stacked warp knitted layers (12) is a warp knitted connection structure or a physical stacked composite structure.

7. The high-strength three-dimensional protective fabric with a multi-layer warp knitted structure according to claim 1, characterized in that: The material of the protective layer (1) is one of ultra-high molecular weight polyethylene (UHMWPE) fibers, aramid, para-aramid, aramid II, aramid III, or a combination thereof.

8. The three-dimensional multi-layer integrated protective fabric according to claim 1, characterized in that: The material of the skin-contacting layer (3) is the same as that of the protective layer (1), both of which are high-strength protective fabric fibers.

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