Fiber-based anti-puncture composite material for shoes and preparation method of fiber-based anti-puncture composite material

Abstract

The invention discloses a fiber-based anti-puncture composite material for shoes and a preparation method thereof, the fiber-based anti-puncture composite material for shoes comprises a woven fabric layer, a needled felt layer and a knitted fabric layer in sequence from bottom to top, the bottom layer is the woven fabric layer all the time, the surface layer is the knitted fabric layer all the time, and the middle comprises at least one needled felt layer; the layers are subjected to flexible heat bonding through resin to form a whole; kevlar high-performance fibers are used as raw materials of the woven fabric layer, and warps and wefts adopt second twist yarns with the same fineness. The woven fabric layer, the fiber raw materials and the fabric weave structure of the bottom layer cooperate to guarantee high strength, stretch resistance, tear resistance, puncture resistance and high temperature resistance of the fabric, the high-volume-density needled felt layer can resist sharp instruments penetrating through the woven fabric layer to further penetrate into the woven fabric layer, puncture of the sharp instruments is effectively prevented, and the knitted fabric layer of the surface layer can effectively prevent the sharp instruments from penetrating into the woven fabric layer. The extensibility and the limit locking state of the coil structure are double guarantees for preventing sharp instrument puncture.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fiber-based shoe materials, in particular to a fiber-based shoe puncture-resistant composite material and a preparation method thereof. BACKGROUND

[0002] Shoes, as an important part of human clothing, not only need to meet the performance of warmth and comfort, but also need to have excellent safety performance. In daily life, it is occasionally possible to step on sharp objects such as nails, and in high-risk industries such as construction, mining, and mechanical manufacturing, and in special sites such as firefighting and disaster relief, the probability of the shoe body contacting sharp weapons is higher. However, the existing shoe materials have some shortcomings, for example:

[0003] The application number CN201910534422.X is a shoe environment-friendly wear-resistant and anti-skid foam composite material and a preparation method thereof. The material uses graphene oxide modified desulfurization ash as a composite wear-resistant and anti-skid agent, has good compatibility with the matrix, is easy to disperse, has excellent wear-resistant and anti-skid effect, and has excellent mechanical properties. However, in actual use, it is difficult to protect against the risk of being stabbed by various sharp objects such as knives in daily life, thereby reducing the protection efficiency of the material.

[0004] Therefore, we propose a fiber-based shoe puncture-resistant composite material and a preparation method thereof to solve the problems mentioned above. SUMMARY

[0005] The present application aims to provide a fiber-based shoe puncture-resistant composite material and a preparation method thereof to solve the problem that the current market shoe puncture-resistant composite material is difficult to protect against the risk of being stabbed by various sharp objects such as knives in daily life.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a fiber-based shoe puncture-resistant composite material, comprising:

[0007] The fiber-based shoe puncture-resistant composite material comprises a woven fabric layer, a needle felt layer, and a knitted fabric layer from bottom to top. The structure can be matched to three layers, four layers, or five layers according to the application scene requirements of the shoe body, and the bottom layer is always a woven fabric layer, the surface layer is always a knitted fabric layer, and at least one needle felt layer is contained in the middle. The layers are integrally formed by flexible thermal bonding of resin;

[0008] The woven fabric layer uses Kevlar high-performance fiber as raw material, and the warp and weft yarns use the same fineness of complex twisted yarn. The needle felt layer uses ultra-high molecular weight polyethylene short fiber as raw material, and the knitted fabric layer uses polyamide wear-resistant synthetic short fiber as raw material. By virtue of the high-strength characteristics and plain tight structure of Kevlar fiber, the impact energy of sharp instruments is absorbed and dispersed, blunt injury is avoided, and puncture resistance and high-temperature resistance are guaranteed.

[0009] The base layer of the woven fabric layer, the fiber raw material cooperates with the fabric structure to ensure high strength, stretch resistance, tear resistance, puncture resistance and high temperature resistance, and the high bulk density needle felt layer can resist the further penetration of sharp objects after penetrating the woven fabric layer, effectively preventing sharp objects from penetrating, and the knitted fabric layer of the surface layer, the extensibility and ultimate locking state of the loop structure are multiple safeguards against sharp object penetration, and the short fiber yarn such as nylon ensures comfort.

[0010] As a preferred technical solution of the present application, the complex twisted silk fineness of the woven fabric layer ranges from 20 to 40 tex, the fabric structure is plain, the warp and weft density is the same and ranges from 220 to 400 per 10 cm.

[0011] The above technical solution can make the fineness of Kevlar complex twisted silk cooperate with the plain weave structure, and the fineness of 20-40 tex ensures the balance between yarn rigidity and toughness, and the interlacing points of warp and weft yarns of the plain weave structure are dense, forming a dense protective structure; the same warp and weft density design makes the fabric evenly stressed in all directions, effectively dispersing the impact energy of sharp objects, the puncture resistance reaches 1500N or more, and the dense structure also endows the fabric with excellent high temperature resistance, avoiding the decay of protective performance in high temperature environment, and adapting to the safety protection needs of multiple scenes.

[0012] As a preferred technical solution of the present application, the fiber fineness of the needle felt layer is 1.5-2.5 tex, the fiber length is 51-75 mm, the grammage range is 500-2000 g / m², the thickness range is 1.0-2.8 mm, and the bulk density is 0.4-0.7 g / m³, wherein the products below 1000 g / m² are tested for puncture force using Φ4.5 mm steel needles, the products of 1000 g / m² and above are tested for puncture force using Φ3.0 mm steel needles, and the puncture force of the needle felt layer reaches 1000N or more.

[0013] The above technical solution can make 1.5-2.5 tex fine denier fibers and 51-75 mm length be matched, improve the entanglement density of fibers, cooperate with the bulk density of 0.4-0.7 g / m³, form a high-density barrier layer, and the gradient steel needle design ensures uniform fiber entanglement of products with different grammage, and the puncture force of 1000N or more can effectively intercept sharp objects; the thickness range of 1.0-2.8 mm can adapt to the space needs of different shoe types, and the thick structure of high grammage products can absorb the kinetic energy of sharp objects penetrating, and low grammage products can ensure protection while taking into account portability.

[0014] As a preferred technical solution of the present application, the yarn density of the knitted fabric layer is 14-38 tex, the twist is 210-310 twists per 10 cm, the horizontal density and the vertical density are the same, which is 110-160 horizontal lines per 5 cm, and the anti-pilling property is 3.5 levels or more.

[0015] The yarn density of 14-38 tex and the twist of 210-310 twists / 10 cm are matched by adopting the technical scheme, the yarn strength and flexibility are balanced, the loop structure can be deformed by sharp impact, locked quickly after consuming impact energy, and double protection is formed; the uniform density of 110-160 longitudinal lines / 5 cm balances the stress of the fabric, the anti-pilling property of 3.5 or more ensures the surface integrity after long-term use, the wear resistance of the polyamide material prolongs the service life, meanwhile, the soft loop structure improves the wearing comfort, and the strength and comfort of the material during use are increased.

[0016] As a preferred technical scheme of the application, the warp and weft yarn of the woven fabric layer can be adjusted in the range of 20-40 tex and 220-400 roots / 10 cm according to the actual anti-puncture requirement, when applied to high-risk industries such as building and mining, 30-40 tex twisted silk and 320-400 roots / 10 cm warp and weft density are selected to improve the protection strength of the bottom layer, and when applied to daily safety protection scenes, 20-30 tex twisted silk and 220-320 roots / 10 cm warp and weft density can be selected to reduce the weight of the material while ensuring the basic anti-puncture performance, and meet the individual needs in different scenes.

[0017] The scene parameter adjustment can realize accurate matching of protection and practicability by adopting the technical scheme, the 30-40 tex twisted silk and 320-400 roots / 10 cm warp and weft density selected for high-risk industries can improve the anti-puncture strength to more than 2000 N and the tear resistance to more than 50 N, meeting the harsh protection requirements of scenes such as building and mining; the 20-30 tex twisted silk and 220-320 roots / 10 cm warp and weft density selected for daily scenes can reduce the weight of the material by 25% while ensuring the anti-puncture strength of more than 1200 N, improve the wearing lightness of the shoe body, avoid the burden in daily use, and increase the protection of the material in use.

[0018] As a preferred technical scheme of the application, the grammage, thickness and bulk density of the needle-punched felt layer can be adjusted within the corresponding range, for special scenes requiring high-strength anti-puncture, a needle-punched felt layer with a grammage of 1500-2000 g / m2, a thickness of 2.0-2.8 mm and a bulk density of 0.6-0.7 g / m3 is selected to enhance the blocking ability of the intermediate protection; for daily light protection requirements, a needle-punched felt layer with a grammage of 500-1000 g / m2, a thickness of 1.0-1.8 mm and a bulk density of 0.4-0.5 g / m3 is selected to optimize the lightness and comfort of the material while ensuring the anti-puncture effect.

[0019] The above technical solutions enable the 1500~2000g / m² weight and 2.0~2.8mm thickness specifications used in high-intensity puncture-resistant scenarios to enhance the sharp object blocking ability through high volume density, effectively intercepting even if a sharp object penetrates the woven fabric layer; while the 500~1000g / m² weight and 1.0~1.8mm thickness specifications used in everyday lightweight scenarios reduce material thickness by 30% and weight by 40% while maintaining a 1000N puncture force, adapting to the lightweight design requirements of everyday shoes, while improving breathability and increasing the protective performance of the material during use.

[0020] As a preferred technical solution of the present invention, a method for preparing a fiber-based puncture-resistant composite material for footwear, wherein the production process of the woven fabric layer of the fiber-based puncture-resistant composite material for footwear is as follows: warp yarns are wound into a bobbin, warped, and knotted in sequence to obtain a warp beam; weft yarns are wound into a bobbin and hot-wet twisted in sequence to obtain a bobbin; the warp yarns on the bobbin and the weft yarns on the bobbin are interwoven in a plain weave on a loom to form a woven fabric layer; and the woven fabric layer of the fiber-based puncture-resistant composite material for footwear is obtained by winding.

[0021] The production process of the needle-punched felt layer of fiber-based anti-puncture composite material for shoes is as follows: short fiber, opening, carding, web laying, pre-punching, main punching, and winding. The high volume density and isotropic characteristics of the fibers formed by the mutual entanglement and cohesion of the fibers through needle punching achieve uniform force distribution, effectively intercept sharp objects and quickly disperse the kinetic energy of the knife penetration, and prevent the sharp object from penetrating further into the woven fabric layer.

[0022] The production process of the knitted layer of fiber-based puncture-resistant composite material for shoes is as follows: the yarn is made by sequentially going through the processes of unwinding, padding, bending, pressing, looping, unwinding, forming loops, forming fabric, and winding. With the help of the unique loop structure of the knitted fabric, when the knife strikes, it can deform and transfer the impact force with the direction of the knife tip. After the loop spreads, it forms a locked state, which, together with the yarn, applies cutting resistance to the knife and absorbs the puncture force.

[0023] The above technical solutions enable the refined process of the woven fabric layer to ensure uniform yarn arrangement and complete fabric structure, providing a stable foundation for puncture resistance; the cross-laying and gradient needle punching process of the needle-punched felt layer ensures that the fiber web uniformity deviation is ≤±5%, the fibers are tightly entangled, and the force is evenly distributed, quickly dispersing the puncture kinetic energy; the loop forming process of the knitted fabric layer gives the loops excellent deformation and locking characteristics, which transfer energy during impact and form a physical barrier after locking, which, together with the yarn cutting resistance, further consumes the puncture force.

[0024] As a preferred technical solution of the present application, in the warp yarn processing of the woven fabric layer, the bobbin winding process adopts constant tension winding equipment, the winding tension is controlled to be 8~15cN, to ensure that the ply yarn does not be over-stretched or relaxed during the winding process, and to ensure the stability of the yarn structure; the warping process adopts batch warping process, the warping speed is 300~500m / min, the tension deviation between the warp yarns is controlled within ±1cN, to make the warp yarns arrange uniformly and closely, to provide guarantee for the warp and weft density precision of the subsequent plain fabric; the threading warp process adopts automatic threading warp equipment, the threading accuracy is not less than 99.8%, to avoid the occurrence of broken yarn, skipping line and other defects in the weaving process due to the threading error of the warp yarn, to ensure the structural integrity and the consistency of the stab-resistant performance of the woven fabric layer; the hot and wet setting twist process parameters of the weft yarn are temperature 40~60℃, relative humidity 60%~80%, and heat preservation time 20~40min, to effectively eliminate the residual stress in the ply yarn, to reduce the weft shrinkage phenomenon in the weaving process, and to improve the dimensional stability and the stretch resistance of the woven fabric layer.

[0025] The above technical solution can make the constant tension winding avoid over-stretching or relaxing of the yarn, guarantee the stability of the yarn structure; the strip warping makes the warp yarns arrange uniformly and closely, to provide guarantee for the warp and weft density precision; the automatic threading warp reduces the weaving defects, to ensure the consistency of the stab-resistant performance; the hot and wet setting twist of the weft yarn eliminates the residual stress, reduces the weft shrinkage phenomenon, and improves the dimensional stability and the stretch resistance of the fabric.

[0026] As a preferred technical solution of the present application, in the production process of the needle felt layer, the opening process adopts double-roller opener, the opening roller speed is 600~1000r / min, to make the ultra-high molecular weight polyethylene short fiber form a uniform single fiber state through graded opening, to avoid the influence of fiber agglomeration on the subsequent carding effect; the carding process adopts flat carding machine, the carding speed is 80~120m / min, the uniformity deviation of the fiber web after carding is not more than ±5%, to ensure the thickness consistency of the fiber web; the laying process adopts cross-laying process, the laying layer number is 3~8 layers, the gram weight deviation of each layer of fiber web is controlled within ±3%, to make the overall gram weight and thickness of the needle felt layer uniformly distributed; the pre-stabbing and main stabbing processes have a needle density of 100~200 needles / cm² and 400~800 needles / cm² respectively, and a needle depth of 8~15mm, to make the fibers entangle and hold each other more closely through gradient needling, to ensure that the needle felt layer meets the requirement of a puncture force of more than 1000N; the winding process adopts constant tension winding, the winding tension is 20~30cN, to avoid wrinkles or stretching deformation of the needle felt layer during the winding process, to ensure the structural compactness and isotropic characteristics thereof.

[0027] The above technical solution can make the double-roller opening realize uniform dispersion of the fibers to avoid agglomeration; the flat carding makes the uniformity deviation of the fiber web ≤±5%, to ensure the thickness consistency; the cross-laying process makes the needle felt layer have isotropic characteristics.

[0028] Compared with the prior art, the beneficial effects of the present application are that the woven fabric layer of the bottom layer cooperates with the fabric structure to ensure high strength, stretch resistance, tear resistance, puncture resistance and high temperature resistance, the high bulk density needle felt layer can resist further penetration of sharp objects after penetrating the woven fabric layer, effectively preventing sharp objects from penetrating, and the knitted fabric layer of the surface layer has the extensibility and ultimate locking state of the loop structure, which is a multiple guarantee against sharp object penetration. The short fiber yarn such as nylon ensures the comfort of use.

[0029] Further, by adjusting the twist yarn fineness and warp and weft density of the woven fabric layer, the scene parameter adjustment can realize accurate matching of protection and practicality. The 30-40tex twist yarn and 320-400 roots / 10cm warp and weft density selected by high-risk industries can increase the puncture resistance to more than 2000N and the tear resistance to more than 50N, meeting the severe protection requirements of scenes such as construction and mining; the 20-30tex twist yarn and 220-320 roots / 10cm warp and weft density selected for daily scenes can reduce the material weight by 25% on the premise of ensuring a puncture resistance of more than 1200N, improve the lightness of the shoe body, avoid the burden in daily use, and increase the protection of the material in use.

[0030] Further, by adjusting the grammage, thickness and bulk density of the needle felt layer, the 1500-2000g / m² grammage and 2.0-2.8mm thickness specifications selected for high-strength puncture-resistant scenes can enhance the sharp object blocking ability through high bulk density, so that even if the sharp object breaks through the woven fabric layer, it can still be effectively intercepted; the 500-1000g / m² grammage and 1.0-1.8mm thickness specifications selected for daily light scenes can reduce the material thickness by 30% and the weight by 40% on the basis of maintaining a puncture force of 1000N, adapt to the light and thin design requirements of daily shoes, and improve the air permeability. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a structure diagram of the puncture-resistant composite material for fiber-based shoes according to the present application.

[0032] Figure 2 It is a preparation process diagram of the woven fabric layer of the puncture-resistant composite material for fiber-based shoes according to the present application.

[0033] Figure 3 It is a preparation process diagram of the needle felt layer of the puncture-resistant composite material for fiber-based shoes according to the present application.

[0034] Figure 4 It is a preparation process diagram of the knitted fabric layer of the puncture-resistant composite material for fiber-based shoes according to the present application. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application.

[0036] Please refer to Figures 1-4 The present application provides a technical solution: a fiber-based shoe puncture-resistant composite material, comprising:

[0037] The fiber-based shoe puncture-resistant composite material comprises a woven fabric layer, a needle felt layer and a knitted fabric layer from bottom to top, which can be matched into a three-layer, four-layer or five-layer structure according to the application scene requirements of the shoe body, and the bottom layer is always a woven fabric layer, the surface layer is always a knitted fabric layer, and at least one needle felt layer is contained in the middle, and the layers are integrally formed by flexible thermal bonding of resin;

[0038] The woven fabric layer uses Kevlar high-performance fiber as raw material, and the warp and weft yarns use the same fineness of complex twisted yarn, the needle felt layer uses ultra-high molecular weight polyethylene short fiber as raw material, and the knitted fabric layer uses nylon wear-resistant synthetic short fiber as raw material, which realizes the absorption and dispersion of sharp impact energy by virtue of the high strength characteristics and plain tight structure of Kevlar fiber, avoids blunt injury and guarantees puncture resistance and high temperature resistance;

[0039] The complex twisted yarn of the woven fabric layer has a fineness range of 20-40 tex, and the fabric organization is plain, with the same warp and weft density in the range of 220-400 per 10 cm;

[0040] The fiber fineness of the needle felt layer is 1.5-2.5 tex, the fiber length is 51-75 mm, the grammage range is 500-2000 g / m², the thickness range is 1.0-2.8 mm, and the bulk density is 0.4-0.7 g / m³, wherein the products below 1000 g / m² use Φ4.5 mm steel needle to test the puncture force, the products of 1000 g / m² and above use Φ3.0 mm steel needle to test the puncture force, and the puncture force of the needle felt layer reaches 1000 N or more;

[0041] The knitted fabric layer has a yarn density of 14-38 tex and a twist of 210-310 twists per 10 cm, and the horizontal density and the vertical density are the same, which is 110-160 longitudinal lines per 5 cm, and the anti-pilling property is above 3.5 levels;

[0042] The warp and weft twisted yarn fineness of the woven fabric layer can be adjusted in the range of 20-40 tex and 220-400 roots / 10 cm according to actual anti-puncture requirements. When applied to high-risk industries such as construction and mining, 30-40 tex twisted yarn and 320-400 roots / 10 cm warp and weft density are selected to improve the protection strength of the bottom layer. When applied to daily safety protection scenarios, 20-30 tex twisted yarn and 220-320 roots / 10 cm warp and weft density can be selected to reduce the weight of the material while ensuring basic anti-puncture performance, meeting individual needs in different scenarios;

[0043] The grammage, thickness and bulk density of the needle-punched felt layer can be adjusted within the corresponding range. For special scenarios that require high-strength anti-puncture, a needle-punched felt layer with a grammage of 1500-2000 g / m², a thickness of 2.0-2.8 mm and a bulk density of 0.6-0.7 g / m³ is selected to enhance the blocking ability of the intermediate protection. For daily lightweight protection needs, a needle-punched felt layer with a grammage of 500-1000 g / m², a thickness of 1.0-1.8 mm and a bulk density of 0.4-0.5 g / m³ is selected to optimize the portability and comfort of the material while ensuring anti-puncture performance;

[0044] The production process of the woven fabric layer of the fiber-based anti-puncture composite material for shoes is as follows: the warp twisted yarn is wound, beamed, threaded and knitted to obtain a beam, and then woven and rolled. The weft twisted yarn is wound and heat-moisture set to obtain a bobbin. The warp yarn on the beam and the weft yarn on the bobbin are interwoven into a woven fabric layer on a loom with a plain weave, and the woven fabric layer of the fiber-based anti-puncture composite material for shoes is obtained by rolling.

[0045] The production process of the needle-punched felt layer of the fiber-based anti-puncture composite material for shoes is as follows: short fibers are opened, carded, laid, pre-stitched, main-stitched and rolled. The high bulk density and isotropic characteristics of the fiber formed by needle punching enable uniform stress distribution, effective interception of sharp objects and rapid dispersion of the kinetic energy of the knife penetrating the woven fabric layer, thereby preventing the sharp object from penetrating further.

[0046] The production process of the knitted fabric layer of the fiber-based anti-puncture composite material for shoes is as follows: yarn is subjected to uncoiling, lapping, bending, pressing, looping, unlooping, looping, fabric forming and rolling. The unique loop structure of the knitted fabric can deform and shift to dissipate the impact force when the knife strikes. The loops expand to form a locked state, and the yarn exerts a cutting resistance on the knife to absorb the puncture force.

[0047] In the warp processing of the woven fabric layer, the bobbin process adopts constant tension bobbin equipment, the bobbin tension is controlled to be 8-15 cN, the overstretching or relaxation of the ply-twisted yarn in the bobbin process is ensured, the yarn structure stability is ensured; the warping process adopts batch warping process, the warping speed is 300-500 m / min, the tension deviation between the warps is controlled to be within ±1 cN, the warp arrangement is uniform and compact, the warp and weft density precision of the subsequent plain fabric is ensured; the threading warp process adopts automatic threading warp equipment, the threading accuracy is not less than 99.8%, the broken yarn, skipping and other defects in the weaving process caused by the warp threading error are avoided, the structure integrity and the stabile performance consistency of the woven fabric layer are ensured; the hot and wet setting twist process parameters of the weft yarn are that the temperature is 40-60 DEG C, the relative humidity is 60%-80%, the holding time is 20-40 min, the residual stress in the ply-twisted yarn is effectively eliminated through the process;

[0048] In the production process of the needle felt layer, the opening process adopts double-roller opening machine, the opening roller speed is 600-1000 r / min, the ultra-high molecular weight polyethylene short fiber is formed into uniform single fiber state through graded opening, the fiber agglomeration affecting the subsequent carding is avoided; the carding process adopts flat carding machine, the carding speed is 80-120 m / min, the uniformity deviation of the fiber web after carding is not more than ±5%, the thickness consistency of the fiber web is ensured; the laying process adopts cross-laying process, the laying layer number is 3-8, the gram weight deviation of each fiber web is controlled to be within ±3%, the overall gram weight and thickness of the needle felt layer are uniformly distributed; the needle density of the pre-needling and main needling processes is 100-200 needles / cm² and 400-800 needles / cm² respectively, the needle depth is 8-15 mm, the fibers are entangled and held more closely through gradient needling, the puncture force requirement of the needle felt layer reaching more than 1000 N is ensured; the winding process adopts constant tension winding, the winding tension is 20-30 cN.

[0049] Therefore, a series of work is completed, and the content not described in detail in the specification belongs to the prior art known to those skilled in the art.

[0050] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the involved claims.

Claims

1. A fiber-based puncture-resistant composite material for shoes, characterized in that, include: The fiber-based puncture-resistant composite material for footwear comprises, from bottom to top, a woven fabric layer, a needle-punched felt layer, and a knitted fabric layer. The bottom layer is always a woven fabric layer, the top layer is always a knitted fabric layer, and the middle layer contains at least one needle-punched felt layer. The layers are bonded together by flexible resin thermal bonding to form a whole. The woven fabric layer uses Kevlar high-performance fiber as raw material, and the warp and weft yarns use retwisted yarn of the same fineness. The needle-punched felt layer uses ultra-high molecular weight polyethylene short fiber as raw material, and the knitted fabric layer uses nylon abrasion-resistant synthetic short fiber as raw material. With the high strength characteristics and plain weave tight structure of Kevlar fiber, it can absorb and disperse the impact energy of sharp objects, avoid blunt injury, and ensure puncture resistance and high temperature resistance.

2. The fiber-based puncture-resistant composite material for shoes according to claim 1, characterized in that, The fineness of the retwisted yarn in the woven fabric layer ranges from 20 to 40 tex, the fabric structure is plain weave, and the warp and weft densities are the same, ranging from 220 to 400 threads / 10cm.

3. The fiber-based puncture-resistant composite material for shoes according to claim 2, characterized in that, The needle-punched felt layer has a fiber fineness of 1.5~2.5tex, a fiber length of 51~75mm, a basis weight range of 500~2000g / m², a corresponding thickness range of 1.0~2.8mm, and a bulk density of 0.4~0.7g / m³. For products with a puncture force below 1000g / m², a Φ4.5mm steel needle is used to test the puncture force; for products with a puncture force of 1000g / m² and above, a Φ3.0mm steel needle is used to test the puncture force. The puncture force of the needle-punched felt layer reaches 1000N or more.

4. The fiber-based puncture-resistant composite material for shoes according to claim 3, characterized in that, The yarn density of the knitted fabric layer is 14~38 tex, the twist is 210~310 twists / 10cm, the warp density is the same as the weft density, which is 110~160 wefts / 5cm, and the pilling resistance is above 3.

5.

5. The fiber-based puncture-resistant composite material for shoes according to claim 4, characterized in that, The fineness and density of the warp and weft yarns in the woven fabric layer can be adjusted within the range of 20~40tex and 220~400 threads / 10cm according to actual stab protection requirements. When applied to high-risk industries such as construction and mining, 30~40tex retwisted yarn and 320~400 threads / 10cm warp and weft density are selected to improve the bottom layer protection strength. When applied to daily safety protection scenarios, 20~30tex retwisted yarn and 220~320 threads / 10cm warp and weft density can be selected to reduce the weight of the material while ensuring basic stab protection performance, thus meeting the personalized needs of different scenarios.

6. The fiber-based puncture-resistant composite material for shoes according to claim 5, characterized in that, The weight, thickness, and bulk density of the needle-punched felt layer can be adjusted within a corresponding range. For special scenarios requiring high-strength puncture resistance, a needle-punched felt layer with a weight of 1500~2000 g / m², a thickness of 2.0~2.8 mm, and a bulk density of 0.6~0.7 g / m³ is selected to enhance the blocking ability of the intermediate protection. For everyday lightweight protection needs, a needle-punched felt layer with a weight of 500~1000 g / m², a thickness of 1.0~1.8 mm, and a bulk density of 0.4~0.5 g / m³ is selected to optimize the lightness and comfort of the material while ensuring puncture resistance.

7. A method for preparing a fiber-based puncture-resistant composite material for shoes as described in any one of claims 1-6, characterized in that, The production process of the woven fabric layer of the fiber-based puncture-resistant composite material for footwear is as follows: the warp yarns are wound into a bobbin, warped, and knotted in sequence to obtain a warp beam, which is then woven and wound up. The weft yarns are wound into a bobbin and hot-wet twisted in sequence to obtain a bobbin. The warp yarns on the bobbin and the weft yarns on the bobbin are interwoven in a plain weave on the loom to form a woven fabric layer, which is then wound up to obtain the woven fabric layer of the fiber-based puncture-resistant composite material for footwear. The production process of the needle-punched felt layer of the fiber-based anti-puncture composite material for shoes is as follows: short fiber, opening, carding, web laying, pre-punching, main punching, and winding. The high volume density and isotropic characteristics of the fibers formed by the mutual entanglement and cohesion of the needle punches achieve uniform force distribution, effectively intercept sharp objects and quickly disperse the kinetic energy of the knife penetration, and prevent the sharp object from penetrating further into the woven fabric layer. The production process of the knitted layer of the fiber-based puncture-resistant composite material for shoes is as follows: the yarn is made by sequentially going through the processes of unwinding, padding, bending, pressing, looping, unwinding, forming loops, forming fabric, and winding. With the help of the unique loop structure of the knitted fabric, when the knife strikes, it can deform and transfer the impact force with the direction of the knife tip. After the loop spreads, it forms a locked state, which, together with the yarn, applies cutting resistance to the knife and absorbs the puncture force.

8. The method for preparing the fiber-based puncture-resistant composite material for shoes according to claim 7, characterized in that, During the warp processing of the woven fabric layer, the winding process uses constant tension winding equipment to control the winding tension at 8~15cN, ensuring that the retwisted yarn does not undergo excessive stretching or relaxation during winding, thus guaranteeing the stability of the yarn structure. The warping process adopts a batch warping process with a warping speed of 300~500m / min, controlling the tension deviation between warp yarns within ±1cN, so that the warp yarns are arranged evenly and tightly, providing a guarantee for the warp and weft density accuracy of the subsequent plain weave fabric. The knotting process uses automatic knotting equipment with a knotting accuracy rate of not less than 99.8%, avoiding yarn breakage, skipped threads, and other defects caused by incorrect knotting of warp yarns during weaving, ensuring the structural integrity and consistent puncture resistance of the woven fabric layer. The hot and wet twisting process for weft yarns has parameters of temperature 40~60℃, relative humidity 60%~80%, and heat preservation time 20~40min, which effectively eliminates residual stress inside the retwisted yarn.

9. The method for preparing the fiber-based puncture-resistant composite material for shoes according to claim 8, characterized in that, In the production process of the needle-punched felt layer, the opening process uses a double-roller opening machine with a roller speed of 600~1000 r / min. This graded opening process ensures that the ultra-high molecular weight polyethylene short fibers form a uniform single-fiber state, preventing fiber agglomeration from affecting subsequent carding. The carding process uses a cover plate carding machine with a carding speed of 80~120 m / min. The uniformity deviation of the carded fiber web does not exceed ±5%, ensuring the consistency of the fiber web thickness. The web laying process uses a cross-laying technique. The number of mesh layers is 3 to 8, and the weight deviation of each fiber mesh layer is controlled within ±3%, so that the overall weight and thickness of the needle-punched felt layer are evenly distributed. The needle-punching density of the pre-punching and main-punching processes is 100 to 200 needles / cm² and 400 to 800 needles / cm², respectively, and the needle-punching depth is 8 to 15 mm. Gradient needle-punching makes the fibers more tightly entangled and bound together, ensuring that the needle-punched felt layer meets the puncture force requirement of more than 1000 N. The winding process adopts constant tension winding with a winding tension of 20 to 30 cN.

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