Flexible rollable lap joint type stab-resistant layer, stab-resistant garment and preparation method of stab-resistant garment

Abstract

The invention relates to the technical field of stab-resistant body protection, in particular to a flexible rollable lap joint type stab-resistant layer, stab-resistant clothes and a preparation method thereof.The stab-resistant layer comprises a protective sleeve and a stab-resistant layer inner core located in the protective sleeve, the stab-resistant layer inner core comprises stab-resistant base cloth, a plurality of closely-arranged stab-resistant pieces are bonded to the stab-resistant base cloth, and the stab-resistant pieces are arranged on the protective sleeve. The stab-resistant pieces are provided with lap joint pieces, the splicing positions of the adjacent stab-resistant pieces are covered with the lap joint pieces, one sides of the lap joint pieces are bonded to the stab-resistant pieces, and the adjacent stab-resistant pieces are covered with the other sides of the lap joint pieces in a lap joint mode. The stab-resistant base cloth is aramid fabric, and the stab-resistant pieces and the lap joint pieces are made of aramid fabric prepreg or carbon fiber fabric prepreg in a hot pressing mode. The stab-resistant clothes are formed by the multiple small-size stab-resistant pieces and the lap joint pieces in the lap joint mode, the whole structure is soft and can be curled, the human body fitting performance is greatly improved, and the flexibility and convenience of a wearer in the activity process are guaranteed.

Description

Technical Field

[0001] The invention relates to a flexible rollable overlapping stab-proof layer, a stab-proof clothing and a preparation method thereof, belonging to the technical field of stab-proof body protection. Background Art

[0002] Stab-proof clothing has become an important personal protective equipment due to its strong stab-proof ability and convenient carrying. In addition, stab-proof clothing plays an important role in other special environments and daily personal safety protection. Its product quality, technical content and protective ability have become the focus of the industry.

[0003] The "GA68-2024 Police Anti-Stab Clothing" officially implemented on July 1, 2024, puts forward new requirements for the weight, thickness and curvature of anti-stab clothing. However, most of the existing hard anti-stab clothing have built-in metal or ceramic splints. The hard material with high hardness can directly resist the knife through its own hardness when it is impacted by the knife, hindering the cutting effect of the knife. This type of anti-stab clothing has a good anti-stab effect, convenient processing and low cost; but it also has many disadvantages, such as: heavy, rigid, limited flexibility of human movement after wearing, and it is difficult to meet the requirements of the new standard for weight and curvature. The soft liner material of soft anti-stab clothing is mainly based on high-performance filament woven fabrics or felts, which are processed by weaving, coating or dipping. The advantages of soft anti-stab clothing are high softness and easy storage; the disadvantages are weak anti-stab performance, poor thermal and wet comfort after multi-layer stacking, and it is difficult to meet the requirements of the new standard for thickness.

[0004] The patent application with publication number CN201088147Y discloses a protective body with metal sheets bonded to it for making stab-proof clothing, which is composed of ready-made clothing sheets, adhesives and metal sheets. The metal sheets are bonded to the ready-made clothing sheets with adhesives. The presence of the metal sheets will greatly reduce the wearing comfort of the stab-proof clothing. The patent application with publication number CN112318954A discloses a composite single-layer board with stab-proof function. The single-layer board is formed by two layers of unidirectional fiber prepregs compounded by special weaving process and then molded, and the layers are bonded by resin; the stab-proof clothing made with the stab-proof single-layer board has poor bending properties.

[0005] Therefore, how to improve the lightness and flexibility of stab-proof clothing while meeting the protective performance is a problem that technicians in this field continue to pay attention to. The present invention prepares a stab-proof clothing that meets the new standards by optimizing materials, structures and processes. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a flexible and rollable overlapping stab-proof layer, a stab-proof garment and a preparation method thereof. The stab-proof layer can reduce the weight of the stab-proof garment and improve the softness and wearing comfort of the stab-proof garment.

[0007] The technical solution of the present invention to solve the above technical problems is as follows: a flexible rollable overlapping stab-proof layer, the stab-proof layer comprises a protective cover and an inner core of the stab-proof layer located in the protective cover, the inner core of the stab-proof layer comprises a stab-proof base fabric, a plurality of tightly arranged stab-proof sheets are bonded to the stab-proof base fabric, a lap piece is provided on the stab-proof sheet, the lap piece covers the joint of adjacent stab-proof sheets, one side of the lap piece is bonded to the stab-proof sheet, and the other side of the lap piece overlaps and covers the adjacent stab-proof sheet; The stab-proof base fabric is aramid fabric, and the stab-proof sheet and the overlap sheet are obtained by hot pressing aramid fabric prepreg or carbon fiber fabric prepreg.

[0008] Furthermore, the stab-proof sheet is a rectangular structure, and the overlapping sheet is an L-shaped structure; The side length of the stab-proof sheet is 2.5-5.0 cm, and the width of each side strip of the overlapping sheet is 6-9 mm.

[0009] Furthermore, the surface density of the stab-proof base fabric is 260-350 g / m 2 ; The thickness of the stab-proof sheet and the overlap sheet is 1-2 mm, and the weight of the single-layer prepreg is 280-330 g / m 2 ; The overall thickness of the stab-proof layer is 2-4 mm, and the rubber content of the stab-proof layer is 35-55%.

[0010] Furthermore, when preparing the stab-proof sheet and the overlap sheet, aramid fabric or carbon fiber fabric is compounded with epoxy resin to form a prepreg; The stab-proof sheet or overlapping sheet is made by hot pressing 6 to 12 layers of prepreg.

[0011] Furthermore, the adhesive used in bonding is at least one of an adhesive prepared from an acrylic latex and a curing agent, a moisture-curing reactive polyurethane hot melt adhesive, and an epoxy resin adhesive; The mass ratio of the acrylic latex to the curing agent is 10:(0.8-1).

[0012] Furthermore, the protective cover is a waterproof and breathable fabric formed by laminating a woven fabric woven from polyamide yarn and a waterproof and breathable membrane.

[0013] The present invention also discloses a method for preparing a flexible and rollable overlapping stab-proof layer, the preparation method comprising: Hot-pressing a plurality of layers of aramid fabric prepreg or carbon fiber fabric prepreg to obtain a composite material flat plate, and cutting the composite material flat plate to obtain the stab-proof sheet and the overlapping sheet; Applying adhesive on the stab-proof base fabric, bonding the stab-proof sheet to the stab-proof base fabric; then applying glue on the edge of the stab-proof sheet, bonding part of the overlapping sheet to the stab-proof sheet, and overlapping and covering another part of the overlapping sheet on the adjacent stab-proof sheet, to obtain the stab-proof layer inner core; The stab-proof layer inner core is placed in the protective sleeve and heat-sealed to finally obtain the stab-proof layer.

[0014] Furthermore, when the adhesive is a glue prepared from acrylic latex and a curing agent or a moisture-curing reactive polyurethane hot melt adhesive, after the stab-proof sheet is evenly covered on the glue-coated stab-proof base cloth, the stab-proof sheet and the stab-proof base cloth are bonded after being maintained at a temperature of 60-80°C and a pressure of 0.1-1.0MPa for 0.5-1.0 hours.

[0015] Furthermore, the composite material flat plate is cut by laser or water jet to obtain the stab-proof sheet and the overlapping sheet.

[0016] The present invention also discloses a stab-proof garment, which is obtained by installing the stab-proof layer of the present invention into the stab-proof area of ​​the stab-proof garment jacket, wherein the stab-proof base fabric of the inner core of the stab-proof layer faces the inner side of the body, and the overlapping piece of the inner core of the stab-proof layer faces the outer side.

[0017] The beneficial effects of the present invention are: Compared with the traditional hard and multi-layer soft stab-proof clothing, the overall weight of the stab-proof clothing of the present invention is reduced, and the weight of the stab-proof layer can be controlled at 0.7-1.6kg; at the same time, the thickness of the stab-proof layer is greatly reduced, the thickness of the stab-proof sheet can be controlled at 1-2mm, and the overall thickness of the stab-proof layer can be controlled at 2-4mm; it meets the requirements of "GA68-2024 Police Stab-Proof Clothing" on the weight and thickness of the stab-proof clothing. The stab-proof clothing greatly reduces the wearer's weight and foreign body sensation.

[0018] In the stab-proof layer of the present invention, the splicing of several stab-proof sheets is conducive to ensuring that the stab-proof layer maintains good curling performance. By setting overlapping sheets at the splicing of the stab-proof sheets and coordinating the reasonable bonding method of the overlapping sheets, the stab-proof performance can be provided at the seams of the tightly fitted stab-proof sheets, avoiding the stab-proof blind area caused by the gap in the seams, and at the same time ensuring that the overall stab-proof layer still has good bendability after the overlapping structure is pasted. Therefore, the stab-proof clothing has good safety performance and ensures good wearing comfort.

[0019] The stab-proof clothing of the present invention is formed by overlapping a plurality of small-sized stab-proof sheets and overlapping sheets. The overall structure is soft and rollable, which greatly enhances the fit to the human body and ensures the flexibility and convenience of the wearer during activities. The stab-proof clothing of the present invention has the advantages of being light and thin, and can reduce the weight and thickness of the stab-proof clothing while meeting the protection requirements, thereby improving the softness and wearing comfort of the stab-proof clothing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The schematic diagram of the installation arrangement of the stab-proof sheet and the overlapping sheet on the stab-proof base fabric; Figure 2 The explosion structure diagram of the anti-stab plate and the overlap plate; Figure 3 It is a schematic diagram of the structure of the anti-stab sheet and the overlapping sheet; In the figure, 1. anti-stab sheet; 2. overlapping sheet. DETAILED DESCRIPTION

[0021] The specific implementation of the present invention is described in detail below. The present invention can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used are only for describing specific embodiments and are not intended to limit the present invention.

[0023] A flexible rollable overlapping stab-proof layer, the stab-proof layer comprising a protective cover and an inner core of the stab-proof layer located in the protective cover, the inner core of the stab-proof layer comprising a stab-proof base fabric, a plurality of tightly arranged stab-proof sheets 1 are bonded to the stab-proof base fabric, a lap piece 2 is provided on the stab-proof sheet 1, the lap piece 2 covers the joint of adjacent stab-proof sheets 1, one side of the lap piece 2 is bonded to the stab-proof sheet 1, and the other side of the lap piece 2 overlaps and covers the adjacent stab-proof sheet 1; The stab-proof base fabric is aramid fabric, and the stab-proof sheet 1 and the overlap sheet 2 are obtained by hot pressing aramid fabric prepreg or carbon fiber fabric prepreg.

[0024] Specifically, Figure 1-Figure 2 As shown, the stab-proof sheet 1 is a rectangular structure, and the overlapping sheet 2 is an L-shaped structure; like Figure 3 As shown, the side length (L1 and L2) of the stab-proof sheet 1 is 2.5-5.0 cm, and the width of each side strip of the overlapping sheet 2 is ( W ) is 6-9mm.

[0025] When the side length of the stab-proof sheet 1 is 2.5-5.0cm, flexibility, processing convenience and processing efficiency can be taken into account. The use of L-shaped overlapping pieces 2 and rectangular-structured stab-proof sheets 1 makes it easier to install and cooperate between the stab-proof sheet 1 and the overlapping pieces 2. The inner angle part of the L-shaped overlapping piece 2 is bonded to the two sides of a stab-proof sheet 1, and the outer angle part of the L-shaped overlapping piece 2 is overlapped on two stab-proof sheets 1 adjacent to the stab-proof sheet 1. The stab-proof layer can avoid the stab-proof blind area caused by the gap in the seam of the stab-proof sheet 1 while maintaining good bendability. In addition, the size setting of the stab-proof sheet 1 and the overlapping piece 2 can make the stab-proof layer lighter, softer and more comfortable while ensuring that the stab-proof layer has good bendability. If the size of the stab-proof sheet 1 is too large, the bendability of the stab-proof layer will be poor. If the size of the stab-proof sheet 1 is too small, more overlapping pieces 2 need to be set, and more adhesives need to be used, resulting in an increase in the weight of the stab-proof layer and a decrease in softness.

[0026] More specifically, the stab-proof base fabric is a high surface density twill fabric woven from para-aramid yarn, and the surface density of the stab-proof base fabric is 260-350 g / m 2 If the surface density of the stab-proof base fabric is too low, it will be detrimental to the anti-stab safety and the adhesion of the stab-proof sheet 1 to the stab-proof base fabric; if the surface density of the stab-proof base fabric is too high, it will increase the weight of the overall anti-stab layer and also affect the wearing comfort.

[0027] The thickness of the stab-proof sheet 1 and the overlap sheet 2 is 1-2 mm, and the weight of the single-layer prepreg is 280-330 g / m 2 ; The overall thickness of the stab-proof layer is 2-4 mm, and the rubber content of the stab-proof layer is 35-55%.

[0028] Preferably, the stab-proof sheet 1 and the overlapping sheet 2 have the same thickness.

[0029] More preferably, the width of the overlapping piece 2 pasted on the stab-proof sheet 1 accounts for 1 / 4 to 1 / 2 of the width of the overlapping piece 2, the width of the overlapping piece 2 not bonded to the stab-proof sheet 1 is 3-5mm, and the width of the bonding part of the overlapping piece 2 and the stab-proof sheet 1 is ≥2.5mm.

[0030] More preferably, the thickness of the stab-proof sheet 1 is h , in mm; the width of the overlapping portion of the overlapping sheet 2 that is not bonded to the stab-proof sheet 1 (ie, the width of the overlapping portion) is w , the unit is mm, then w ≥1.8e 0.32h The width of the overlapped piece 2 is W , the unit is mm, then W <10.2e -0.12hUnder this relationship condition, it is more conducive to taking into account both puncture-proof safety and lightness and comfort at the same time.

[0031] Specifically, when preparing the stab-proof sheet 1 and the overlap sheet 2, aramid fabric or carbon fiber fabric is compounded with epoxy resin to form a prepreg; The stab-proof sheet 1 or the overlapping sheet 2 is made by hot pressing 6 to 12 layers of prepreg.

[0032] Among them, in the embodiment of the present invention, the aramid fabric or carbon fiber fabric and epoxy resin are compounded to form a prepreg which is an existing product (1084K / AP200 Weihai Lanke Composite Materials Technology Co., Ltd.).

[0033] According to the curing process of the resin, set the hot pressing temperature, pressure, time, heating and cooling rate and time, exhaust times and other parameters of the hot press. After the hot pressing is completed, take out the composite material plate.

[0034] Specifically, the adhesive used in bonding is at least one of an adhesive prepared from acrylic latex and a curing agent, a moisture-curing reactive polyurethane hot melt adhesive, and an epoxy resin adhesive; The mass ratio of the acrylic latex to the curing agent is 10:(0.8-1).

[0035] Specifically, the protective cover is a black waterproof and breathable fabric formed by laminating a woven fabric woven from polyamide yarn and a waterproof and breathable membrane.

[0036] The protective cover has good dimensional stability and waterproof and breathable properties, and can meet the requirements of good sealing after 6L of tap water is injected into the protective cover and suspended for 30 minutes; and the hydrostatic pressure level reaches level 3 or above specified in GB / T 4744-2013 when tested at a water pressure rise rate of 6.0 kPa / min±0.3 kPa / min. After the above-mentioned stab-proof layer is prepared, it is placed in the stab-proof layer protective cover, and the stab-proof layer protective cover is heat-sealed and sealed.

[0037] The present invention also discloses a method for preparing a flexible and rollable overlapping stab-proof layer, the preparation method comprising: Hot-pressing a plurality of layers of aramid fabric prepreg or carbon fiber fabric prepreg to obtain a composite material flat plate, and cutting the composite material flat plate to obtain the stab-proof sheet 1 and the overlapping sheet 2; Applying adhesive on the stab-proof base fabric, bonding the stab-proof sheet 1 to the stab-proof base fabric; then brushing glue on the edge of the stab-proof sheet 1, bonding part of the overlapping sheet 2 to the stab-proof sheet 1, and overlapping and covering another part of the overlapping sheet 2 on the adjacent stab-proof sheet 1, to obtain the stab-proof layer inner core; The stab-proof layer inner core is placed in the protective sleeve and heat-sealed to finally obtain the stab-proof layer.

[0038] Specifically, when an adhesive prepared by acrylic latex and a curing agent is used to bond the stab-proof sheet 1, the mass ratio of the acrylic latex to the curing agent is 10:(0.8-1), the acrylic main agent and the curing agent are mixed and mechanically stirred, the speed is set to 300-500r / min, the stirring time is 5-20min, and after static defoaming, ultrasonic defoaming or centrifugal defoaming, the adhesive is evenly coated on the stab-proof base fabric with a wire rod or a coater or other related equipment, and the stab-proof sheet 1 is evenly covered on the stab-proof base fabric after the adhesive is applied.

[0039] When moisture-curing reactive polyurethane hot melt adhesive is used to bond the stab-proof sheet 1, the hot melt adhesive is placed in an oven and heated for 1-2 hours. When the hot melt adhesive becomes a uniformly flowing liquid state, it is taken out, and the glue is evenly coated on the stab-proof base cloth with a wire rod or a coating machine or other related equipment. The stab-proof sheet 1 is evenly covered on the glue-coated stab-proof base cloth, and the stab-proof sheets 1 are tightly fitted without obvious gaps.

[0040] Finally, the whole stab-proof sheet 1 and the stab-proof base are placed on a hot press, and the temperature is set to 60-80° C. and the pressure is set to 0.1-1.0 MPa. After maintaining for 0.5-1 hour, the hot press is placed at room temperature and pressure.

[0041] Specifically, the composite material flat plate is cut by laser or water jet to obtain the stab-proof sheet 1 and the overlap sheet 2, so as to ensure that the cut surface is smooth and flat without burrs, so that the stab-proof sheet 1 has a good size fit when being bonded, and there is no obvious gap between adjacent stab-proof sheets 1.

[0042] More specifically, when the overlapping sheet 2 is bonded, epoxy resin AB glue or acrylic glue is evenly coated on the edge of the stab-proof sheet 1 with a glue brush. The glue coating width is the bonding width of the overlapping sheet 2. The overlapping sheet 2 is pasted on the joint of the adjacent stab-proof sheet 1 to ensure that a partial area of ​​the overlapping sheet 2 is in contact with the glue. The overlapping sheet 2 with the remaining width is naturally overlapped on the adjacent stab-proof sheet 1. After being placed at room temperature and pressure for 0.5-1 hour, the inner core of the stab-proof layer is completed.

[0043] The present invention also discloses a stab-proof garment, wherein the stab-proof layer of the present invention is installed in the stab-proof area of ​​the stab-proof garment jacket to obtain the stab-proof garment, the stab-proof base fabric of the inner core of the stab-proof layer faces the inside of the body, and the overlapping piece 2 of the inner core of the stab-proof layer faces the outside. The functional layer of the stab-proof garment is generally divided into two parts, the front piece and the back piece, and targeted local protection can also be performed at the side waist and other positions to increase the overall protection area of ​​the stab-proof garment.

[0044] Example 1 The method for preparing the stab-resistant clothing provided in this embodiment comprises the following steps: (1) Cutting of stab-proof base fabric: Aramid fabric (a high surface density twill fabric woven from para-aramid yarn with a surface density of 300 g / m 2 ) is cut into the required shape and size, and transparent tape is pasted on the four sides to prevent it from falling apart. Then, the aramid fabric is fixed to the bottom surface of the template to ensure that the anti-stab base fabric will not slip when the patch is glued.

[0045] (2) Preparation of stab-proof sheets The stab-proof sheet is a composite material made of aramid woven prepreg through a hot pressing process. The aramid woven fabric used is a plain woven fabric (TH1101) formed by weaving para-aramid filaments of Taihe New Materials Group, which is compounded with epoxy resin (2125B, Weihai Lanke Composite Materials Technology Co., Ltd.) to form aramid prepreg.

[0046] Cut the aramid prepreg into 4cm×4cm square sheets: After aligning and laying the 8 layers of prepreg, wrap them with release paper and place them on the hot press table of the hot press. Set the process parameters on the hot press: heating rate 1℃ / min, temperature rise to 80℃, insulation time 30min, then exhaust 3-5 times, pressurize to 6.0MPa, insulation and pressure holding time 180min, cooling rate 2℃ / min. After the cooling is completed, take out the composite material flat plate and clean the edge overflow glue. According to the size of the anti-stab sheet 4cm×4cm and the L-shaped overlap sheet width of 6mm (the width of the longitudinal and transverse strips is 6mm), design the cutting path on the water jet cutting machine, draw the layout diagram, and generate the cutting code. Fix the composite material sheet on the cutting machine, adjust the depth of the blade and the cutting origin, and confirm the start of cutting. After cutting, take out the anti-stab sheet and wipe it clean for use. The weight of a single-layer prepreg is 300 g / m 2 .

[0047] (3) Pasting of anti-stab sheet: Mix 10 parts of acrylic latex (1318s) and 1 part of curing agent (PM-200) evenly, use mechanical stirring, set the speed to 300r / min, and stir for 15min. After standing and defoaming, obtain the adhesive, and evenly apply the adhesive on the stab-proof base fabric with a wire rod. Fit the stab-proof sheet cut in the previous step tightly on the stab-proof base fabric. Then place it on the hot press, set the temperature to 60℃, the pressure to 0.1MPa, and keep it warm and pressurized for 30min.

[0048] (4) Overlapping piece pasting: Take out the stab-proof base fabric containing the stab-proof sheet prepared in the previous step, and brush the glue prepared in the previous step on the upper and right edges of each stab-proof sheet, with a width of 3mm. Paste the overlapping sheets on the two edges of the stab-proof sheet respectively, ensuring that the inner edge of the overlapping sheet contacts the glue and the outer edge overlaps the adjacent stab-proof sheet. After the overlapping sheets are pasted on the edges of all square stab-proof sheets, the inner core of the stab-proof layer is prepared.

[0049] (5) Post-processing: The stab-proof layer core prepared in the previous step is arranged according to the shape of the stab-proof jacket, cut on a laser cutting machine, and sealed with waterproof and breathable black heat-sealed cloth (KB-TPU802 from Zhejiang Kebang New Materials Co., Ltd.). After bonding, the entire stab-proof layer is inserted into the stab-proof jacket. The product logo is attached to the collar, and relevant information such as the production date is noted.

[0050] The stab-proof clothing manufactured in this embodiment was tested according to the relevant requirements of the Ministry of Public Security GA68-2024 "Police Stab-Proof Clothing" standard for Class A stab-proof clothing. The test results are shown in Table 1.

[0051] Example 2 The method for preparing the stab-resistant clothing provided in this embodiment comprises the following steps: (1) Cutting of stab-proof base fabric: Aramid fabric (a high surface density twill fabric woven from para-aramid yarn with a surface density of 260 g / m 2 ) is cut into the required shape and size, and transparent tape is pasted on the four sides to prevent it from falling apart. Then, the aramid fabric is fixed to the bottom surface of the template to ensure that the anti-stab base fabric will not slip when the patch is glued.

[0052] (2) Preparation of stab-proof sheets: The stab-proof sheet is a composite material made of carbon fiber woven fabric prepreg through a hot pressing process. The carbon fiber woven fabric used is a plain woven fabric formed by a weaving process of T300-3K filaments, which is compounded with epoxy resin (2125B, Weihai Lanke Composite Materials Technology Co., Ltd.) to form a carbon fiber prepreg. The carbon fiber prepreg is cut into 40cm×40cm square pieces. After aligning and laying the 12 layers of prepreg, it is wrapped with release paper and placed on the hot pressing table of the hot press. The process parameters are set on the hot press: heating rate 1℃ / min, temperature rises to 80℃, insulation time 30min, then vents 3-5 times, pressurizes to 6.0MPa, insulation and pressure holding time 180min, and cooling rate 2℃ / min. After the cooling is completed, take out the composite material flat plate and clean the glue overflow on the edge. According to the size of the stab-proof sheet of 3cm×3cm and the L-shaped overlap sheet of 8mm width (the width of the longitudinal and transverse overlap strips are both 8mm), the cutting path is designed on the laser cutting machine, the layout diagram is drawn, and the cutting code is generated. Fix the composite material sheet on the cutting machine, adjust the laser power and speed, locate the cutting origin, and confirm the start of cutting. After cutting, take out the stab-proof sheet for use. The weight of a single-layer prepreg is 330 g / m 2 .

[0053] (3) Pasting of anti-stab sheet: Place the moisture-curing reactive polyurethane hot melt adhesive (8040-FR Tianyang New Materials) in an oven and heat it for 2 hours. Take it out when the hot melt adhesive becomes a uniformly flowing liquid state, and evenly apply the glue on the aramid woven fabric with a coating scraper. Fit the stab-proof sheet cut in the previous step tightly on the stab-proof base fabric. Then place it on a hot press, set the temperature to 80℃, the pressure to 0.1MPa, and keep it warm and pressurized for 30 minutes.

[0054] (4) Pasting of overlapping pieces: Take out the stab-proof base fabric containing the stab-proof sheet prepared in the previous step, and apply epoxy resin glue (9030 Shenzhen Tegu New Materials Co., Ltd.) on the upper and right edges of each stab-proof sheet, with a width of 4mm. Paste the overlapping sheets on the two edges of the stab-proof sheet respectively, ensuring that the inner edge of the overlapping sheet contacts the glue and the outer edge overlaps the adjacent stab-proof sheet. After the overlapping sheets are pasted on the edges of all square stab-proof sheets, the inner core of the stab-proof layer is prepared.

[0055] (5) Post-processing: The stab-proof layer core prepared in the previous step is arranged according to the shape of the stab-proof jacket, cut on a laser cutting machine, and sealed with waterproof and breathable black heat-sealed cloth. After bonding, the entire stab-proof layer is inserted into the stab-proof jacket. The product logo is attached to the collar, and the production date and other relevant information are noted.

[0056] The stab-proof clothing manufactured in this embodiment was tested according to the relevant requirements of the Ministry of Public Security GA68-2024 "Police Stab-Proof Clothing" standard for Class A stab-proof clothing. The test results are shown in Table 1.

[0057] Example 3 The method for preparing the stab-resistant clothing provided in this embodiment comprises the following steps: (1) Cutting of stab-proof base fabric: Aramid fabric (a high surface density twill fabric woven from para-aramid yarn with a surface density of 350 g / m 2 ) is cut into the required shape and size, and transparent tape is pasted on the four sides to prevent it from falling apart. Then, the aramid fabric is fixed to the bottom surface of the template to ensure that the anti-stab base fabric will not slip when the patch is glued.

[0058] (2) Preparation of stab-proof sheets The stab-proof sheet is a composite material made of aramid woven prepreg through a hot pressing process. The aramid woven fabric used is a plain woven fabric formed by the weaving process of the para-aramid filaments of Taihe New Materials Group, which is compounded with epoxy resin (2125B, Weihai Lanke Composite Materials Technology Co., Ltd.) to form an aramid prepreg. The aramid prepreg is cut into square pieces of 40cm×40cm. After aligning and laying the 6 layers of prepreg, it is wrapped with release paper and placed on the hot pressing table of the hot press. Set the process parameters on the hot press: heating rate 1℃ / min, temperature rise to 80℃, insulation time 30min, then vent 3-5 times, pressurize to 6.0MPa, insulation and pressure holding time 180min, cooling rate 2℃ / min. After the cooling is completed, take out the composite material flat plate and clean the overflow glue on the edge. According to the size of the stab-proof sheet of 5cm×5cm and the L-shaped overlap sheet of 6mm width (the width of the longitudinal and transverse overlap strips is 6mm), the cutting path is designed on the laser cutting machine, the layout diagram is drawn, and the cutting code is generated. Fix the composite material sheet on the cutting machine, adjust the laser power and speed, locate the cutting origin, and confirm the start of cutting. After cutting, take out the stab-proof sheet for use. The single-layer prepreg has a gram weight of 280 g / m 2 .

[0059] (3) Pasting of anti-stab sheet: Place the moisture-curing reactive polyurethane hot melt adhesive (8040-FR Tianyang New Materials) in an oven and heat it for 2 hours. Take it out when the hot melt adhesive becomes a uniformly flowing liquid state, and evenly apply the glue on the aramid woven fabric with a coating scraper. Fit the stab-proof sheet cut in the previous step tightly on the stab-proof base fabric. Then place it on a hot press, set the temperature to 60°C, the pressure to 0.1MPa, and keep it warm and pressurized for 30 minutes.

[0060] (4) Pasting of overlapping pieces: Take out the stab-proof base layer prepared in the previous step, and apply epoxy resin glue (9030 Shenzhen Tegu New Materials Co., Ltd.) on the upper and right edges of each stab-proof sheet, with a width of 3mm. Paste the overlapping pieces on the two edges of the stab-proof sheet respectively, ensuring that the inner edge of the overlapping piece contacts the glue and the outer edge overlaps the adjacent stab-proof sheet. After the overlapping pieces are pasted on the edges of all square stab-proof sheets, the inner core of the stab-proof layer is prepared.

[0061] (5) Post-processing The stab-proof layer core prepared in the previous step is arranged according to the shape of the stab-proof jacket, cut on a laser cutting machine, and sealed with waterproof and breathable black heat-sealed cloth. After bonding, the entire stab-proof layer is inserted into the stab-proof jacket. The product logo is attached to the collar, and the production date and other relevant information are noted.

[0062] The stab-proof clothing manufactured in this embodiment was tested according to the relevant requirements of the Ministry of Public Security GA68-2024 "Police Stab-Proof Clothing" standard for Class A stab-proof clothing. The test results are shown in Table 1.

[0063] Example 4 The stab-resistant clothing was prepared by the same method as in Example 2, except that the width of the overlapping strip in Example 4 was 9 cm (the widths of the longitudinal strip and the transverse strip were both 9 mm).

[0064] Comparative Example 1 The preparation method of the stab-resistant clothing provided in this comparative example 1 is a conventional metal sheet material, and the specific preparation process includes the following steps: (1) Manufacturing of the stab-proof inner core: The stab-proof stainless steel sheets (thickness 0.1mm) are cut into several layers according to the shape and size of the stab-proof clothing. According to the protection requirements, 10 layers of metal sheets are stacked together and the edges are wrapped with anti-cut tape to prevent the sharp metal edges from cutting the outer layer of the stab-proof layer and the outer jacket of the stab-proof clothing, causing potential human harm.

[0065] (2) Post-processing: The stab-proof layer inner core prepared in the previous step is sealed with waterproof and breathable black heat-sealed cloth. After bonding, the entire stab-proof layer is inserted into the stab-proof jacket. The product logo is attached to the collar, and the production date and other relevant information are noted.

[0066] Comparative Example 2 The stab-proof clothing was prepared by the same method as in Example 1, except that: in this comparative example 2, the composite material flat plate was not cut into stab-proof sheets, and the whole composite material flat plate was directly pasted on the stab-proof base cloth as the inner core of the stab-proof layer, and the other process methods were the same as in Example 1.

[0067] Comparative Example 3 The stab-proof clothing was prepared by the same method as in Example 1, except that: in this comparative example 3, when preparing the inner core of the stab-proof layer, no overlapping sheet was pasted, and the other process methods were the same as in Example 1.

[0068] Comparative Example 4 The stab-resistant clothing was prepared by the same method as in Example 3, except that: in the preparation of the stab-resistant inner core in this comparative example 4, the width of the overlapped sheet was W It is 4 mm (lower than the width defined in the present invention).

[0069] Comparative Example 5 The stab-resistant clothing was prepared by the same method as in Example 2, except that: in the preparation of the stab-resistant inner core in this comparative example 5, the width of the overlapped sheet was W It is 12 mm (larger than the width defined in the present invention).

[0070] Comparative Example 6 The stab-proof clothing was prepared by the same method as in Example 1, except that the amount of curing agent added in step (3) of this comparative example 6 was increased, and the stab-proof sheet could be attached without being processed in a hot press. The specific preparation process of step (3) was as follows: Mix 10 parts of acrylic latex (1318s) and 1.3 parts of curing agent (PM-200) evenly, use mechanical stirring, set the speed to 300r / min, and stir for 15 minutes. After standing and defoaming, obtain the adhesive, and evenly apply the adhesive on the stab-proof base fabric with a wire rod. Put the stab-proof sheet cut in the previous step tightly on the stab-proof base fabric and place it at room temperature and pressure to achieve the adhesion of the stab-proof sheet.

[0071] Table 1 Performance test results

[0072] The data in the table are tested according to the test standard of "GA68-2024 Police Anti-stab Clothing". The thickness in the table is the total thickness of the overlapping piece and the anti-stab piece. The curvature refers to the pressure value when the anti-stab clothing is bent 20mm. The average value is taken as the curvature reported value.

[0073] From the above table data, it can be seen that the stab-proof clothing of the present invention is made of multiple small-sized stab-proof sheets and overlapping sheets, and the overall structure is soft and rollable, which greatly enhances the fit of the human body and ensures the flexibility and convenience of the wearer during activities. The stab-proof clothing of the present invention has the advantages of being light and thin, and can reduce the weight and thickness of the stab-proof clothing while meeting the protection requirements, thereby improving the softness and wearing comfort of the stab-proof clothing. In addition, from the comparison of the data of Example 4 and Example 2, it can be seen that when the structural dimensions of the overlapping sheets meet the requirements, the stab-proof clothing can be made of a plurality of small-sized stab-proof sheets and overlapping sheets, and the overall structure is soft and rollable, which greatly enhances the fit of the human body and ensures the flexibility and convenience of the wearer during activities. w ≥1.8e 0.32h , W <10.2e-0.12h It is more conducive to making the stab-proof clothing lighter and easier to bend while having better stab resistance.

[0074] From the comparison of the data of comparative example 1 and embodiments 1-4, it can be seen that the stab-proof layer of the present invention can significantly improve the wearing comfort compared with the conventional metal stab-proof layer.

[0075] From the comparison of the data of comparative example 2 and example 1, it can be seen that if a whole composite material flat plate is directly pasted on the stab-proof base fabric as the inner core of the stab-proof layer, when the bending test is performed, the deformation does not reach 20 mm when the load is increased to 180N, and it is directly judged as unqualified. In order to prevent further pressure from causing irreversible damage to the stab-proof layer, the test was terminated, and the wearing comfort was poor.

[0076] From the comparison of the data of Comparative Example 3 and Example 1, it can be seen that if the overlapping piece is not pasted when the stab-proof layer inner core is prepared, the stab-proof clothing is very easy to be punctured, and the safety is significantly affected.

[0077] From the comparison of the data of Comparative Example 4 and Example 1, it can be seen that if the width of the overlap sheet is too small, the processing process is more troublesome, and the overlap sheet is easy to fall off when stabbed with a knife, and there is a risk of puncture.

[0078] From the comparison of the data of comparative example 5 and embodiment 2, it can be seen that if the width of the overlapping piece is too large, the overall weight of the stab-proof clothing will be overweight, affecting the wearing comfort.

[0079] From the data comparison of Comparative Example 6 and Example 1, it can be seen that if the amount of curing agent is increased, the anti-stab sheet can be bonded without heating and pressurizing treatment, but the shortened curing time of the glue easily leads to the situation that the anti-stab sheet is cured before being placed, which puts forward requirements for the processing speed. At the same time, after curing, the anti-stab layer becomes hard and the bending performance deteriorates, thereby affecting the wearing comfort. The present invention adds a curing agent in an appropriate proportion and cooperates with the subsequent heating and pressurizing treatment to finally achieve the firm adhesion of the anti-stab sheet while ensuring that the anti-stab clothing has good bending performance, thereby improving the wearing comfort.

[0080] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are exhaustively listed. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0081] For those skilled in the art, several modifications and improvements may be made without departing from the concept of the present invention, all of which belong to the protection scope of the present invention. The protection scope of the present invention shall be based on the attached claims.

Claims

1. A flexible rollable overlapping stab-proof layer, characterized in that: The stab-proof layer comprises a protective cover and an inner core of the stab-proof layer located in the protective cover, the inner core of the stab-proof layer comprises a stab-proof base fabric, a plurality of tightly arranged stab-proof sheets are bonded to the stab-proof base fabric, and a lap joint is provided on the stab-proof sheet, the lap joint covers the joint of adjacent stab-proof sheets, one side of the lap joint is bonded to the stab-proof sheet, and the other side of the lap joint overlaps and covers the adjacent stab-proof sheet; The stab-proof base fabric is aramid fabric, and the stab-proof sheet and the overlap sheet are obtained by hot pressing aramid fabric prepreg or carbon fiber fabric prepreg.

2. A flexible rollable overlapping stab-proof layer according to claim 1, characterized in that: The stab-proof sheet is a rectangular structure, and the overlapping sheet is an L-shaped structure; The side length of the stab-proof sheet is 2.5-5.0 cm, and the width of each side strip of the overlapping sheet is 6-9 mm.

3. The flexible rollable overlapping stab-proof layer according to claim 1, characterized in that: The surface density of the stab-proof base fabric is 260-350 g / m 2 ; The thickness of the stab-proof sheet and the overlap sheet is 1-2 mm, and the weight of the single-layer prepreg is 280-330 g / m 2 ; The overall thickness of the stab-proof layer is 2-4 mm, and the rubber content of the stab-proof layer is 35-55%.

4. The flexible rollable overlapping stab-proof layer according to claim 1, characterized in that: When preparing the stab-proof sheet and the overlap sheet, aramid fabric or carbon fiber fabric is compounded with epoxy resin to form a prepreg; The stab-proof sheet or overlapping sheet is made by hot pressing 6 to 12 layers of prepreg.

5. The flexible rollable overlapping stab-proof layer according to claim 1, characterized in that: The adhesive used for bonding is at least one of an adhesive prepared from acrylic latex and a curing agent, a moisture-curing reactive polyurethane hot melt adhesive, and an epoxy resin adhesive; The mass ratio of the acrylic latex to the curing agent is 10:(0.8-1).

6. The flexible rollable overlapping stab-proof layer according to claim 1, characterized in that: The protective cover is a waterproof and breathable fabric formed by laminating a woven fabric woven from polyamide yarn and a waterproof and breathable membrane.

7. A method for preparing a flexible rollable overlapping stab-proof layer according to any one of claims 1 to 6, characterized in that: The preparation method is: Hot-pressing a plurality of layers of aramid fabric prepreg or carbon fiber fabric prepreg to obtain a composite material flat plate, and cutting the composite material flat plate to obtain the stab-proof sheet and the overlapping sheet; Applying adhesive on the stab-proof base fabric, bonding the stab-proof sheet to the stab-proof base fabric; then applying glue on the edge of the stab-proof sheet, bonding part of the overlapping sheet to the stab-proof sheet, and overlapping and covering another part of the overlapping sheet on the adjacent stab-proof sheet, to obtain the stab-proof layer inner core; The stab-proof layer inner core is placed in the protective sleeve and heat-sealed to finally obtain the stab-proof layer.

8. The method for preparing a flexible rollable overlapping stab-proof layer according to claim 7, characterized in that: When the adhesive is a glue prepared by acrylic latex and a curing agent or a moisture-curing reactive polyurethane hot melt adhesive, after the stab-proof sheet is evenly covered on the glue-coated stab-proof base cloth, it is maintained at a temperature of 60-80°C and a pressure of 0.1-1.0MPa for 0.5-1.0 hours to achieve bonding between the stab-proof sheet and the stab-proof base cloth.

9. The method for preparing a flexible rollable overlapping stab-proof layer according to claim 7, characterized in that: The composite material flat plate is cut by using a laser or a water jet to obtain the stab-proof sheet and the overlapping sheet.

10. A stab-proof garment, characterized in that: The stab-proof layer according to any one of claims 1 to 6 is installed in the stab-proof area of ​​a stab-proof clothing outer shell to obtain the stab-proof clothing, the stab-proof base fabric of the inner core of the stab-proof layer faces the inside of the body, and the overlapping piece of the inner core of the stab-proof layer faces the outside.

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