CN119969672A - A flexible rollable overlapping stab-proof layer, stab-proof clothing and preparation method thereof - Google Patents
A flexible rollable overlapping stab-proof layer, stab-proof clothing and preparation method thereof Download PDFInfo
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Abstract
本发明涉及防刺护体技术领域，具体涉及一种柔性可卷曲搭接式防刺层、防刺服及其制备方法，所述防刺层包括保护套和位于所述保护套内的防刺层内芯，所述防刺层内芯包括防刺基布，所述防刺基布上粘结有若干紧密排布的防刺片，所述防刺片上设有搭接片，所述搭接片覆盖于相邻所述防刺片的拼接处，所述搭接片的一侧粘结在所述防刺片上，所述搭接片的另一侧搭接覆盖在相邻所述防刺片上；所述防刺基布为芳纶织物，所述防刺片和搭接片为芳纶织物预浸料或碳纤维织物预浸料热压制得。本发明所述防刺服由多片小尺寸防刺片及搭接片搭接而成，整体结构柔软、可卷曲，极大增强了人体贴合性，保证穿着者在活动时的灵活性和便捷度。
The present invention relates to the technical field of stab-proof body protection, and specifically to a flexible rollable overlapping stab-proof layer, a stab-proof clothing and a preparation method thereof, wherein the stab-proof layer comprises a protective cover and an inner core of the stab-proof layer located in the protective cover, wherein the inner core of the stab-proof layer comprises a stab-proof base fabric, and a plurality of tightly arranged stab-proof sheets are bonded to the stab-proof base fabric, and an overlapping sheet is provided on the stab-proof sheet, and the overlapping sheet covers the joint of adjacent stab-proof sheets, and one side of the overlapping sheet is bonded to the stab-proof sheet, and the other side of the overlapping sheet overlaps and covers the adjacent stab-proof sheet; the stab-proof base fabric is an aramid fabric, and the stab-proof sheet and the overlapping sheet are obtained by hot pressing of aramid fabric prepreg or carbon fiber fabric prepreg. The stab-proof clothing of the present invention is formed by overlapping 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.
Description
Technical Field
The invention relates to a flexible crimpable lap joint type stab-resistant layer, stab-resistant clothing and a preparation method thereof, and belongs to the technical field of stab-resistant protectors.
Background
The stab-resistant clothing becomes important individual protective equipment because of the characteristics of strong stab-resistant capability, convenient carrying and the like. In addition, the stab-resistant clothing plays an important role in other special environments and daily personal safety guarantee, and the product quality, the technical content and the protection capability of the stab-resistant clothing become the focus of industry attention.
The officially implemented GA68-2024 stab-resistant clothing from 2024.07.01 brings new requirements on the aspects of weight, thickness, curvature and the like of the stab-resistant clothing. However, most of the existing hard stab-resistant clothes are internally provided with metal or ceramic splints, and when the hard material with high hardness is impacted by a cutter, the hard material can directly resist the cutter through the hardness of the hard material to block the cutting action of the cutter. The stab-resistant clothing has good stab-resistant effect, convenient processing and low cost, but has a plurality of defects such as heavy weight, high rigidity, limited flexibility of human body movement after wearing, and difficulty in meeting the requirements of new standards on weight and bending degree. The soft lining material of the soft stab-resistant clothing is mainly formed by weaving, coating or dipping based on fabrics or felts woven by high-performance filaments, and has the advantages of high softness and easy storage, and the soft stab-resistant clothing has the defects of weaker stab-resistant performance, poorer hot-wet comfort after multilayer superposition and difficulty in meeting the requirements of new standards on thickness.
The patent application with publication number CN201088147Y discloses a protective body with a metal sheet for making stab-resistant clothing, which consists of a ready-made clothing sheet, an adhesive and the metal sheet, wherein the metal sheet is adhered on the ready-made clothing sheet by adopting the adhesive, and the wearing comfort of the stab-resistant clothing is greatly reduced by the existence of the metal sheet. The patent application with the publication number of CN112318954A discloses a composite material single-layer board with a stab-resistant function, wherein the single-layer board is formed by compounding two layers of unidirectional fiber prepregs through a special weaving process and then molding, resin is used for bonding between layers, and the stab-resistant single-layer board is poor in bending property.
Therefore, how to improve the lightweight and flexibility of the stab-resistant clothing on the premise of satisfying the protective performance is a continuous concern for the person skilled in the art. The stab-resistant clothing meeting the new standard is prepared by optimizing materials, structures and processes.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the flexible curled lap joint type stab-resistant layer, the stab-resistant clothing and the preparation method thereof, wherein the stab-resistant layer can reduce the weight of the stab-resistant clothing and improve the softness and wearing comfort of the stab-resistant clothing.
The flexible curled lap joint type anti-puncture layer comprises a protective sleeve and an anti-puncture layer inner core positioned in the protective sleeve, wherein the anti-puncture layer inner core comprises anti-puncture base cloth, a plurality of closely arranged anti-puncture sheets are bonded on the anti-puncture base cloth, bonding sheets are arranged on the anti-puncture sheets, the bonding sheets are covered at the joint positions of adjacent anti-puncture sheets, one side of each bonding sheet is bonded on each anti-puncture sheet, and the other side of each bonding sheet is lapped and covered on the adjacent anti-puncture sheet;
the stab-resistant base cloth is made of aramid fiber fabric, and the stab-resistant sheet and the strap are made of aramid fiber fabric prepreg or carbon fiber fabric prepreg through hot pressing.
Further, the stab-resistant sheet is of a rectangular structure, and the strap is of an L-shaped structure;
the side length of the stab-resistant sheet is 2.5-5.0cm, and the width of each edge of the strap is 6-9mm.
Further, the surface density of the stab-resistant base fabric is 260-350 g/m 2;
The thickness of the stab-resistant sheet and the strap is 1-2mm, and the gram weight of the single-layer prepreg is 280-330 g/m 2;
the whole thickness of the stab-resistant layer is 2-4mm, and the glue content of the stab-resistant layer is 35-55%.
Further, when the stab-resistant sheet and the strap are prepared, an aramid fabric or a carbon fiber fabric is compounded with epoxy resin to form a prepreg;
The stab-resistant sheet or the strap is prepared by hot press molding 6-12 layers of prepregs.
Further, the adhesive used in the bonding is at least one of glue prepared from acrylate emulsion and a curing agent, moisture-curing reaction type polyurethane hot melt adhesive and epoxy resin adhesive;
The mass ratio of the acrylic latex to the curing agent is 10 (0.8-1).
Further, the protective sleeve is a waterproof breathable fabric formed by attaching a woven fabric woven by polyamide yarns and a waterproof breathable film.
The invention also discloses a preparation method of the flexible crimpable lap joint type anti-puncture layer, which comprises the following steps:
Hot-press molding the multi-layer aramid fiber fabric prepreg or the carbon fiber fabric prepreg to obtain a composite material flat plate, and cutting the composite material flat plate to obtain the stab-resistant sheet and the bonding sheet;
Coating adhesive on the stab-resistant base cloth to bond the stab-resistant sheet on the stab-resistant base cloth, brushing adhesive on the edge of the stab-resistant sheet to bond part of the area of the bonding sheet on the stab-resistant sheet, and overlapping the other part of the area of the bonding sheet on the adjacent stab-resistant sheet to obtain the stab-resistant layer inner core;
and placing the stab-resistant inner core in the protective sleeve, and performing heat sealing to finally obtain the stab-resistant layer.
Further, when the adhesive is a glue prepared from acrylate emulsion and a curing agent or a moisture curing reaction type polyurethane hot melt adhesive, the anti-stab sheet is uniformly covered on the anti-stab base cloth after being glued, and the anti-stab sheet and the anti-stab base cloth are bonded after being kept for 0.5 to 1.0 hour at the temperature of between 60 and 80 ℃ and the pressure of between 0.1 and 1.0 MPa.
Further, the stab-resistant sheet and the strap are obtained by cutting the composite flat plate by using a laser or a water jet.
The invention also discloses a stab-resistant garment, which is obtained by loading the stab-resistant layer into the stab-resistant area of the outer sleeve of the stab-resistant garment, wherein the stab-resistant base cloth of the inner core of the stab-resistant layer faces to the inner side of the body, and the bonding sheets of the inner core of the stab-resistant layer face to the outer side.
The beneficial effects of the invention are as follows:
Compared with the traditional soft stab-resistant clothing paved by hard and multi-layer materials, the stab-resistant clothing disclosed by the invention has the advantages that the overall weight is reduced, the weight of a stab-resistant layer can be controlled to be 0.7-1.6kg, meanwhile, the thickness of a stab-resistant layer is greatly reduced, the thickness of a stab-resistant sheet can be controlled to be 1-2mm, the overall thickness of the stab-resistant layer can be controlled to be 2-4mm, and the requirements of GA68-2024 police stab-resistant clothing on the weight and the thickness of the stab-resistant layer are met. The stab-resistant garment greatly reduces the load and foreign body sensation of the wearer.
In the anti-puncturing layer, the plurality of anti-puncturing sheets are spliced, so that the anti-puncturing layer can keep better crimping performance, the anti-puncturing performance can be provided at the joint of the closely attached anti-puncturing sheets by arranging the bonding sheets at the splicing position of the anti-puncturing sheets and matching with a reasonable bonding mode of the bonding sheets, the anti-puncturing blind area caused by joint gaps is avoided, and meanwhile, the integral anti-puncturing layer still has good bending degree after the bonding of the bonding structure can be ensured. Therefore, the stab-resistant garment has good safety performance and ensures good wearing comfort.
The anti-puncture clothing is formed by overlapping a plurality of small-size anti-puncture sheets and the overlapping sheets, the whole structure is soft and curled, the human body fitting property is greatly enhanced, the flexibility and the convenience of a wearer in the moving process are ensured, the anti-puncture clothing has the advantages of light weight and thinness, the weight and the thickness of the anti-puncture clothing can be reduced while the protection requirement is met, and the softness and the wearing comfort of the anti-puncture clothing are improved.
Drawings
FIG. 1 is a schematic view of the mounting arrangement of the stab-resistant sheet and the strap on the stab-resistant base fabric;
FIG. 2 is an exploded view of the stab protection sheet and the strap;
FIG. 3 is a schematic view of the structure of the stab-resistant sheet and the strap;
In the figure, 1, an anti-puncture sheet, 2, a bonding sheet.
Detailed Description
The following describes the present invention in detail. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, so that the invention is not limited to the specific embodiments disclosed.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The flexible curled lap joint type anti-pricking layer comprises a protective sleeve and an anti-pricking layer inner core positioned in the protective sleeve, wherein the anti-pricking layer inner core comprises anti-pricking base cloth, a plurality of anti-pricking sheets 1 which are closely arranged are bonded on the anti-pricking base cloth, a lapping sheet 2 is arranged on the anti-pricking sheet 1, the lapping sheet 2 covers the splicing part of the adjacent anti-pricking sheets 1, one side of the lapping sheet 2 is bonded on the anti-pricking sheet 1, and the other side of the lapping sheet 2 is lapped and covered on the adjacent anti-pricking sheets 1;
the stab-resistant base cloth is made of aramid fiber fabric, and the stab-resistant sheet 1 and the strap 2 are made of aramid fiber fabric prepreg or carbon fiber fabric prepreg through hot pressing.
Specifically, as shown in fig. 1-2, the stab-resistant sheet 1 has a rectangular structure, and the strap 2 has an L-shaped structure;
as shown in FIG. 3, the side lengths (L 1 and L 2) of the stab-resistant sheet 1 are 2.5 to 5.0cm, and the width (W) of each edge strip of the strap 2 is 6 to 9mm.
When the side length of the stab-resistant sheet 1 is 2.5-5.0cm, the flexibility, the processing convenience and the processing efficiency can be considered. The L-shaped bonding sheet 2 and the rectangular structure of the stab-resistant sheet 1 are used, so that the installation and the mutual matching between the stab-resistant sheet 1 and the bonding sheet 2 are more convenient, the angle inner part of the L-shaped bonding sheet 2 is bonded on two edges of one stab-resistant sheet 1, and the angle outer part of the L-shaped bonding sheet 2 is lapped on two stab-resistant sheets 1 adjacent to the stab-resistant sheet 1. So that the stab-resistant layer can keep better bending performance and avoid stab-resistant dead zones caused by the joint gaps of the stab-resistant sheet 1. In addition, the stab-resistant sheet 1 and the strap 2 are sized so that the stab-resistant layer is lighter and more flexible and comfortable while ensuring good flexibility. If the size of the stab-resistant sheet 1 is too large, it may result in poor bendability of the stab-resistant layer, and if the size of the stab-resistant sheet 1 is too small, it is necessary to provide a greater number of the overlapping pieces 2, and it is necessary to use more adhesive, resulting in an increase in weight of the stab-resistant layer and deterioration in softness.
More specifically, the anti-stab base fabric is a high-surface-density twill fabric woven by para-aramid yarns, the surface density of the anti-stab base fabric is 260-350 g/m 2, if the surface density of the anti-stab base fabric is too low, the anti-stab safety is not facilitated, the anti-stab sheet 1 is not facilitated to be adhered to the anti-stab base fabric, and if the surface density of the anti-stab base fabric is too high, the weight of the whole anti-stab layer is increased, and meanwhile, the wearing comfort is also affected.
The thickness of the stab-resistant sheet 1 and the strap 2 is 1-2mm, and the gram weight of the single-layer prepreg is 280-330 g/m 2;
the whole thickness of the stab-resistant layer is 2-4mm, and the glue content of the stab-resistant layer is 35-55%.
Preferably, the thickness of the stab-resistant sheet 1 and the strap 2 is the same.
More preferably, the bonding width of the bonding sheet 2 on the stab-resistant sheet 1 is 1/4-1/2 of the bonding width of the bonding sheet 2, the bonding width of the bonding sheet 2 and the stab-resistant sheet 1 is 3-5mm, and the bonding width of the bonding portion of the bonding sheet 2 and the stab-resistant sheet 1 is more than or equal to 2.5mm.
More preferably, the thickness of the stab-resistant sheet 1 is h in mm, the width of the bonding part of the bonding sheet 2 with the stab-resistant sheet 1 (i.e. the width of the bonding part) is W in mm, and W is more than or equal to 1.8e 0.32h, the width of the bonding sheet 2 is W in mm, and W is less than 10.2e -0.12h, and under the condition of the relationship, stab-resistant safety, light weight and comfort are more facilitated.
Specifically, when the stab-resistant sheet 1 and the strap 2 are prepared, an aramid fabric or a carbon fiber fabric is used for being compounded with epoxy resin to form a prepreg;
The stab-resistant sheet 1 or the bonding sheet 2 is prepared by hot press molding 6-12 layers of prepregs.
In the embodiment of the invention, the prepreg formed by compounding the aramid fiber fabric or the carbon fiber fabric with the epoxy resin is an existing commodity (1084K/AP 200 Wilhai blue composite material science and technology Co., ltd.).
And setting parameters such as hot press temperature, pressure, time, temperature rising and falling speed, time, exhaust times and the like of the hot press according to the curing process of the resin. And after the hot pressing is finished, taking out the composite material flat plate.
Specifically, the adhesive used in the bonding process is at least one of adhesive prepared from acrylate emulsion and a curing agent, moisture-curing reaction type polyurethane hot melt adhesive and epoxy resin adhesive;
The mass ratio of the acrylic latex to the curing agent is 10 (0.8-1).
Specifically, the protective sleeve is a black waterproof breathable fabric formed by laminating a woven fabric woven by polyamide yarns and a waterproof breathable film.
The protective sleeve has good dimensional stability, waterproof and breathable properties, can meet the requirements of good sealing after 6L of tap water is injected into the protective sleeve to suspend for 30min, and is tested at the water pressure rising rate of 6.0 kPa/min plus or minus 0.3: 0.3 kPa/min, and the hydrostatic pressure grade reaches 3 or more levels specified in GB/T4744-2013. And after the preparation of the stab-resistant layer is finished, the stab-resistant layer is put into a stab-resistant layer protective sleeve, and the stab-resistant layer protective sleeve is sealed by heat sealing.
The invention also discloses a preparation method of the flexible crimpable lap joint type anti-puncture layer, which comprises the following steps:
hot-press molding the multi-layer aramid fiber fabric prepreg or the carbon fiber fabric prepreg to obtain a composite material flat plate, and cutting the composite material flat plate to obtain the stab-resistant sheet 1 and the strap 2;
Coating an adhesive on the stab-resistant base cloth to bond the stab-resistant sheet 1 on the stab-resistant base cloth, brushing adhesive on the edge of the stab-resistant sheet 1 to bond part of the area of the bonding sheet 2 on the stab-resistant sheet 1, and overlapping and covering the other part of the area of the bonding sheet 2 on the adjacent stab-resistant sheet 1 to obtain the stab-resistant layer inner core;
and placing the stab-resistant inner core in the protective sleeve, and performing heat sealing to finally obtain the stab-resistant layer.
Specifically, when the adhesive prepared from the acrylate emulsion and the curing agent is used for bonding the anti-puncture sheet 1, the mass ratio of the acrylate emulsion to the curing agent is 10 (0.8-1), the acrylate main agent and the curing agent are mixed and mechanically stirred, the rotating speed is set to 300-500 r/min, the stirring time is 5-20 min, and after standing, defoaming and ultrasonic defoaming or centrifugal defoaming, the adhesive is uniformly coated on the anti-puncture base cloth by using related equipment such as a wire rod or a coater, and the anti-puncture sheet 1 is uniformly covered on the anti-puncture base cloth after gluing.
When the moisture-curing reaction type polyurethane hot melt adhesive is used for bonding the anti-puncture sheet 1, the hot melt adhesive is placed in an oven and heated for 1-2 hours to be in a liquid state of uniform flow, the hot melt adhesive is taken out, the glue is uniformly coated on the anti-puncture base cloth by using a wire rod or a coating machine and other related equipment, the anti-puncture sheet 1 is uniformly covered on the glued anti-puncture base cloth, and the anti-puncture sheets 1 are tightly adhered without obvious gaps.
Finally, the integral stab-resistant sheet 1 and the stab-resistant base are placed on a hot press, the temperature is set to be 60-80 ℃ and the pressure is set to be 0.1-1.0MPa, and the whole stab-resistant sheet is placed at normal temperature and normal pressure after being kept for 0.5-1 hour.
Specifically, the stab-resistant sheet 1 and the strap 2 are obtained by cutting the composite flat plate using a laser or a water jet. So as to ensure that the section is smooth and flat and has no burrs, and is convenient for the anti-puncturing sheet 1 to have good dimensional anastomosis degree when being bonded, and no obvious gap exists between the adjacent anti-puncturing sheets 1.
More specifically, when bonding the bonding sheet 2, the edge of the stab-resistant sheet 1 is uniformly coated with epoxy resin AB glue or acrylic glue by a glue coating brush, the glue coating width is the bonding width of the bonding sheet 2, the bonding sheet 2 is adhered to the joint of the adjacent stab-resistant sheet 1, the contact of the bonding sheet 2 with the glue is ensured, the bonding sheet 2 with the residual width is naturally lapped on the adjacent stab-resistant sheet 1, and after the bonding sheet is placed for 0.5-1 hour at normal temperature and normal pressure, the inner core of the stab-resistant sheet is manufactured.
The invention also discloses a stab-resistant garment, which is obtained by loading the stab-resistant layer into the stab-resistant area of the outer sleeve of the stab-resistant garment, wherein the stab-resistant base cloth of the inner core of the stab-resistant layer faces to the inner side of the body, and the bonding sheets 2 of the inner core of the stab-resistant layer face to the outer side. The functional layer of the stab-resistant clothing is generally divided into a front piece and a rear piece, and can also carry out targeted local protection at side waist positions, so that the whole protection area of the stab-resistant clothing is increased.
Example 1
The preparation method of the stab-resistant clothing provided by the embodiment comprises the following steps:
(1) Cutting the stab-resistant base cloth:
Cutting an aramid fabric (a high-surface-density twill fabric woven by para-aramid yarns, wherein the surface density is 300 g/m 2) into a required shape and size, and sticking transparent adhesive tapes on four sides of the aramid fabric to perform anti-loosening treatment. And then, the aramid fabric is fixed on the bottom surface of the template tool, so that the anti-puncture base fabric is ensured not to slide during gluing the patch.
(2) Preparation of stab-resistant tablet
The stab-resistant sheet is a composite material prepared from aramid woven prepreg through a hot-pressing process. The aramid woven fabric is plain woven fabric (TH 1101) formed by weaving para-aramid filaments of Tai and New material groups, and is compounded with epoxy resin (2125B, wiggai blue composite materials science and technology Co., ltd.) to form aramid prepreg.
Cutting aramid prepreg into square pieces of 4cm×4cm, aligning and layering 8 layers of prepreg, wrapping with release paper, and placing on a hot press table. Setting technological parameters on a hot press, namely heating up to 1 ℃ per minute, heating up to 80 ℃ for 30 minutes, exhausting for 3-5 times, pressurizing to 6.0MPa, heating up to 180 minutes, and cooling down to 2 ℃ per minute. And after the cooling is finished, taking out the composite material flat plate, and cleaning the edge glue overflow. According to the dimension of the stab-resistant sheet 4cm multiplied by 4cm and the L shape with the strap width of 6mm (the widths of the longitudinal strap and the transverse strap are 6 mm), a cutting path is designed on a water jet cutter, a layout is drawn, and a cutting code is generated. And (3) fixing the composite material plate on a cutting machine tool, adjusting the depth of the cutter head and the cutting origin, and confirming the start of cutting. And after cutting, taking out the stab-resistant sheet and wiping the stab-resistant sheet for standby. Wherein the single layer prepreg gram weight is 300 g/m 2.
(3) Sticking of the stab-resistant sheet:
10 parts of acrylate emulsion (1318 s) and 1 part of curing agent (PM-200) are uniformly stirred, mechanical stirring is used, the rotating speed is set to 300r/min, the stirring time is set to 15min, the adhesive is obtained after standing and defoaming, and the adhesive is uniformly coated on the stab-resistant base cloth by using a wire rod. And tightly attaching the stab-resistant sheet cut in the previous step to the stab-resistant base cloth. Then placing the mixture on a hot press, setting the temperature to be 60 ℃ and the pressure to be 0.1MPa, and keeping the temperature and the pressure for 30min.
(4) Bonding the bonding sheet:
taking out the stab-resistant base cloth containing the stab-resistant sheets prepared in the last step, brushing the glue prepared in the last step on the upper edge and the right edge of each stab-resistant sheet, wherein the glue brushing width is 3mm. The bonding sheets are respectively adhered to the two edges of the stab-resistant sheets, the inner edges of the bonding sheets are ensured to be contacted with glue, and the outer edges of the bonding sheets are lapped on the adjacent stab-resistant sheets. After the bonding sheets are bonded on the edges of all the square stab-resistant sheets, the preparation of the stab-resistant inner core is completed.
(5) Post-treatment:
Typesetting the inner core of the stab-resistant layer prepared in the last step according to the shape of the outer sleeve of the stab-resistant garment, cutting on a laser cutting machine, and sealing and attaching by using waterproof and moisture-permeable black heat-seal cloth (KB-TPU 802 of Zhejiang Corp New Material Co., ltd.). After the bonding, the whole stab-resistant layer is inserted into the stab-resistant clothing coat. Attaching a product mark at the collar position, and marking relevant information such as production date.
The stab-resistant clothing manufactured by the embodiment is tested according to the related requirements of the police stab-resistant clothing of class A standard of GA68-2024 of Ministry of public security. The test results are shown in Table 1.
Example 2
The preparation method of the stab-resistant clothing provided by the embodiment comprises the following steps:
(1) Cutting of the stab-resistant base cloth:
Cutting an aramid fabric (a high-surface-density twill fabric woven by para-aramid yarns, wherein the surface density is 260 g/m 2) into a required shape and size, and sticking transparent adhesive tapes on four sides of the aramid fabric to perform anti-loosening treatment. And then, the aramid fabric is fixed on the bottom surface of the template tool, so that the anti-puncture base fabric is ensured not to slide during gluing the patch.
(2) Preparation of the stab-resistant sheet:
The stab-resistant sheet is a composite material prepared from carbon fiber woven fabric prepreg through a hot-pressing process. The carbon fiber woven fabric is plain woven fabric formed by weaving T300-3K filaments and is compounded with epoxy resin (2125B, wiggaiblue composite material science and technology Co., ltd.) to form carbon fiber prepreg. The carbon fiber prepreg is cut into square pieces with the length of 40cm multiplied by 40cm, 12 layers of the prepreg are aligned and layered, and then the square pieces are wrapped by release paper and placed on a hot press table of a hot press. Setting technological parameters on a hot press, namely heating up to 1 ℃ per minute, heating up to 80 ℃ for 30 minutes, exhausting for 3-5 times, pressurizing to 6.0MPa, heating up to 180 minutes, and cooling down to 2 ℃ per minute. And after the cooling is finished, taking out the composite material flat plate, and cleaning the edge glue overflow. According to the dimension of the stab-resistant sheet 3cm multiplied by 3cm and the L shape with the strap width of 8mm (the widths of the longitudinal strap and the transverse strap are 8 mm), a cutting path is designed on a laser cutting machine, a layout is drawn, and a cutting code is generated. And (3) fixing the composite material plate on a cutting machine tool, adjusting laser power and speed, positioning a cutting origin, and confirming the start of cutting. And after cutting, taking out the stab-resistant sheet for standby. Wherein the single layer prepreg gram weight is 330 g/m 2.
(3) Sticking of the stab-resistant sheet:
The wet-curing reaction type polyurethane hot melt adhesive (8040-FR Tianyang new material) is placed in an oven and heated for 2 hours, and is taken out when the hot melt adhesive becomes a liquid state with uniform flow, and the glue is uniformly coated on the aramid woven cloth by a coating scraper. And tightly attaching the stab-resistant sheet cut in the previous step to the stab-resistant base cloth. Then placing the mixture on a hot press, setting the temperature to be 80 ℃ and the pressure to be 0.1MPa, and keeping the temperature and the pressure for 30min.
(4) Sticking of the bonding sheet:
Taking out the stab-resistant base cloth containing the stab-resistant sheets, brushing epoxy resin glue (9030 Shenzhen new materials Co., ltd.) on the upper edge and the right edge of each stab-resistant sheet, wherein the brushing width is 4mm. The bonding sheets are respectively adhered to the two edges of the stab-resistant sheets, the inner edges of the bonding sheets are ensured to be contacted with glue, and the outer edges of the bonding sheets are lapped on the adjacent stab-resistant sheets. After the bonding sheets are bonded on the edges of all the square stab-resistant sheets, the preparation of the stab-resistant inner core is completed.
(5) Post-treatment:
Typesetting the inner core of the stab-resistant layer prepared in the previous step according to the shape of the outer sleeve of the stab-resistant garment, cutting on a laser cutting machine, and sealing and attaching by using waterproof and moisture-permeable black heat-seal cloth. After the bonding, the whole stab-resistant layer is inserted into the stab-resistant clothing coat. Attaching a product mark at the collar position, and marking relevant information such as production date.
The stab-resistant clothing manufactured by the embodiment is tested according to the related requirements of the police stab-resistant clothing of class A standard of GA68-2024 of Ministry of public security. The test results are shown in Table 1.
Example 3
The preparation method of the stab-resistant clothing provided by the embodiment comprises the following steps:
(1) Cutting of the stab-resistant base cloth:
cutting an aramid fabric (a high-surface-density twill fabric woven by para-aramid yarns, wherein the surface density is 350 g/m 2) into a required shape and size, and sticking transparent adhesive tapes on four sides of the aramid fabric to perform anti-loosening treatment. And then, the aramid fabric is fixed on the bottom surface of the template tool, so that the anti-puncture base fabric is ensured not to slide during gluing the patch.
(2) Preparation of stab-resistant tablet
The stab-resistant sheet is a composite material prepared from aramid woven prepreg through a hot-pressing process. The aramid woven fabric is plain woven fabric formed by weaving Taai and new material group para-aramid filaments, and is compounded with epoxy resin (2125B, wiggaiblue composite material science and technology Co., ltd.) to form aramid prepreg. Cutting aramid prepreg into square pieces with the length of 40cm multiplied by 40cm, aligning and layering 6 layers of prepreg, and then wrapping the square pieces with release paper and placing the square pieces on a hot press table. Setting technological parameters on a hot press, namely heating up to 1 ℃ per minute, heating up to 80 ℃ for 30 minutes, exhausting for 3-5 times, pressurizing to 6.0MPa, heating up to 180 minutes, and cooling down to 2 ℃ per minute. And after the cooling is finished, taking out the composite material flat plate, and cleaning the edge glue overflow. According to the dimension of the stab-resistant sheet 5cm multiplied by 5cm and the L shape with the strap width of 6mm (the widths of the longitudinal strap and the transverse strap are 6 mm), a cutting path is designed on a laser cutting machine, a layout is drawn, and a cutting code is generated. And (3) fixing the composite material plate on a cutting machine tool, adjusting laser power and speed, positioning a cutting origin, and confirming the start of cutting. And after cutting, taking out the stab-resistant sheet for standby. Wherein the single layer prepreg has a gram weight of 280 g/m 2.
(3) Sticking of the stab-resistant sheet:
The wet-curing reaction type polyurethane hot melt adhesive (8040-FR Tianyang new material) is placed in an oven and heated for 2 hours, and is taken out when the hot melt adhesive becomes a liquid state with uniform flow, and the glue is uniformly coated on the aramid woven cloth by a coating scraper. And tightly attaching the stab-resistant sheet cut in the previous step to the stab-resistant base cloth. Then placing the mixture on a hot press, setting the temperature to be 60 ℃ and the pressure to be 0.1MPa, and keeping the temperature and the pressure for 30min.
(4) Sticking of the bonding sheet:
And taking out the puncture-proof base layer prepared in the last step, brushing epoxy resin glue (9030 Shenzhen special solid materials Co., ltd.) on the upper edge and the right edge of each puncture-proof sheet, wherein the brushing width is 3mm. The bonding sheets are respectively adhered to the two edges of the stab-resistant sheets, the inner edges of the bonding sheets are ensured to be contacted with glue, and the outer edges of the bonding sheets are lapped on the adjacent stab-resistant sheets. After the bonding sheets are bonded on the edges of all the square stab-resistant sheets, the preparation of the stab-resistant inner core is completed.
(5) Post-treatment
Typesetting the inner core of the stab-resistant layer prepared in the previous step according to the shape of the outer sleeve of the stab-resistant garment, cutting on a laser cutting machine, and sealing and attaching by using waterproof and moisture-permeable black heat-seal cloth. After the bonding, the whole stab-resistant layer is inserted into the stab-resistant clothing coat. Attaching a product mark at the collar position, and marking relevant information such as production date.
The stab-resistant clothing manufactured by the embodiment is tested according to the related requirements of the police stab-resistant clothing of class A standard of GA68-2024 of Ministry of public security. The test results are shown in Table 1.
Example 4
An anti-stab garment was produced in the same manner as in example 2 except that the width of the strap in this example 4 was 9cm (the width of both the longitudinal strap and the transverse strap was 9 mm).
Comparative example 1
The preparation method of the stab-resistant clothing provided in the comparative example 1 is made of conventional sheet metal, and the specific preparation process comprises the following steps:
(1) Manufacturing an anti-puncture layer inner core:
Cutting the stab-resistant stainless steel sheet (with the thickness of 0.1 mm) into a plurality of layers according to the shape and the size of the stab-resistant clothing, stacking 10 layers of metal sheets together according to the protection requirement, and wrapping edges by using the stab-resistant rubber belt at the edges so as to prevent the sharp metal edges from cutting the outer layer of the stab-resistant layer and the outer sleeve of the stab-resistant clothing, thereby causing potential human injury.
(2) Post-treatment:
and (3) sealing and attaching the stab-resistant inner core prepared in the previous step by using waterproof and moisture-permeable black heat-seal cloth. After the bonding, the whole stab-resistant layer is inserted into the stab-resistant clothing coat. Attaching a product mark at the collar position, and marking relevant information such as production date.
Comparative example 2
The same method as in example 1 was used to prepare the stab-resistant garment, except that the composite panel in comparative example 2 was not cut into stab-resistant sheets, and the whole composite panel was directly adhered to the stab-resistant base fabric as the stab-resistant inner core, and other process methods were the same as in example 1.
Comparative example 3
An anti-puncture garment was manufactured in the same manner as in example 1, except that the inner core of the anti-puncture layer was not adhered in comparative example 3, and the other process was the same as in example 1.
Comparative example 4
An anti-puncture garment was produced in the same manner as in example 3 except that in this comparative example 4, the width W of the overlapping piece was 4mm (lower than the width defined in the present invention) when the inner core of the anti-puncture layer was produced.
Comparative example 5
An anti-puncture garment was produced in the same manner as in example 2 except that the width W of the overlapping flap was 12mm (larger than the width defined in the present invention) in the production of the inner core of the anti-puncture layer in this comparative example 5.
Comparative example 6
The stab-resistant clothing is prepared by adopting the same method as in the embodiment 1, except that the adding amount of the curing agent is increased in the step (3) of the comparative example 6, the sticking of the stab-resistant sheet can be completed without being processed in a hot press, and the specific preparation process of the step (3) is as follows:
10 parts of acrylate emulsion (1318 s) and 1.3 parts of curing agent (PM-200) are uniformly stirred, mechanical stirring is used, the rotating speed is set to 300r/min, the stirring time is set to 15min, the adhesive is obtained after standing and defoaming, and the adhesive is uniformly coated on the stab-resistant base cloth by using a wire rod. And (3) tightly attaching the cut stab-resistant sheet in the previous step to the stab-resistant base cloth, and placing at normal temperature and normal pressure to realize the adhesion of the stab-resistant sheet.
TABLE 1 Performance test results
The data in the table are tested according to the test standard of GA68-2024 police stab-resistant clothing, the thickness in the table is the total thickness of the bonding sheet and the stab-resistant sheet, the flexibility refers to the pressure value when the stab-resistant clothing is bent by 20mm, and the average value is taken as the flexibility report value.
From the data of the table, the anti-puncture clothing is formed by overlapping a plurality of small-size anti-puncture sheets and overlapping sheets, has a soft and curled integral structure, greatly enhances the fit of a human body, ensures the flexibility and convenience of a wearer during activities, has the advantages of light weight and thinness, can reduce the weight and thickness of the anti-puncture clothing while meeting the protection requirements, and improves the softness and wearing comfort of the anti-puncture clothing. In addition, as can be seen from the comparison of the data in the embodiment 4 and the embodiment 2, when the structural size of the strap satisfies that w is more than or equal to 1.8e 0.32h、W<10.2e-0.12h, the stab-resistant clothing is more light and flexible while having better stab resistance.
As can be seen from the comparison of the data of the comparative example 1 and the examples 1-4, the stab-resistant layer provided by the invention can obviously improve the wearing comfort compared with the conventional metal stab-resistant layer.
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 stuck on the stab-resistant base cloth to serve as the inner core of the stab-resistant layer, deformation of 20mm is not achieved when the load is increased to 180N in the bending test, and the failure is directly judged. In order to prevent the puncture-proof layer from being irreversibly damaged due to further pressure, the test is stopped, and the wearing comfort is poor.
From the comparison of the data of comparative example 3 and example 1, it can be seen that if the bonding sheet is not adhered when the inner core of the stab-resistant layer is prepared, the stab-resistant garment is extremely easy to be pierced and the safety is significantly affected.
As can be seen from the comparison of the data of comparative example 4 and example 1, if the width of the strap is too small, the process is troublesome and the strap is liable to come off at the time of lancing, with the risk of being pierced.
From a comparison of the data of comparative example 5 and example 2, it can be seen that if the width of the strap is too large, it can result in the overall overweight of the anti-stab garment, affecting the comfort of the wear.
As can be seen from the comparison of the data of comparative example 6 and example 1, if the amount of the curing agent is increased, the sticking of the puncture-preventing sheet can be realized without heating and pressurizing treatment, but the shortening of the curing time of the glue easily causes the condition that the puncture-preventing sheet is not placed, i.e. cured, and the processing speed is required. Meanwhile, the stab-resistant layer is hardened after curing, and the bending performance is poor, so that the wearing comfort condition is affected. According to the invention, the curing agent with a proper proportion is added and is matched with subsequent heating and pressurizing treatment, so that the anti-stab piece is firmly stuck, and meanwhile, the anti-stab garment is ensured to have good bending performance, thereby improving the wearing comfort.
The technical features of the above-described embodiments may be arbitrarily combined, and in order to simplify the description, all possible combinations of the technical features in the above-described embodiments are not exhaustive, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims.
Claims (10)
1. The flexible curled lap joint type anti-puncture layer is characterized by comprising a protective sleeve and an anti-puncture layer inner core positioned in the protective sleeve, wherein the anti-puncture layer inner core comprises anti-puncture base cloth, a plurality of closely arranged anti-puncture sheets are adhered to the anti-puncture base cloth, the anti-puncture sheets are provided with overlapping sheets, the overlapping sheets are covered at the splicing positions of the adjacent anti-puncture sheets, one side of each overlapping sheet is adhered to the anti-puncture sheet, and the other side of each overlapping sheet is overlapped and covered on the adjacent anti-puncture sheet;
the stab-resistant base cloth is made of aramid fiber fabric, and the stab-resistant sheet and the strap are made of aramid fiber fabric prepreg or carbon fiber fabric prepreg through hot pressing.
2. The flexible, crimpable and overlapping stab resistant layer of claim 1 wherein said stab resistant sheet is a rectangular structure and said strap is an L-shaped structure;
the side length of the stab-resistant sheet is 2.5-5.0cm, and the width of each edge of the strap is 6-9mm.
3. The flexible, crimpable lap joint type anti-stab layer of claim 1, wherein said anti-stab substrate has an areal density of 260-350 g/m 2;
The thickness of the stab-resistant sheet and the strap is 1-2mm, and the gram weight of the single-layer prepreg is 280-330 g/m 2;
the whole thickness of the stab-resistant layer is 2-4mm, and the glue content of the stab-resistant layer is 35-55%.
4. The flexible, crimpable and lap joint type stab resistant layer of claim 1, wherein said stab resistant sheet and strap are made using an aramid fabric or carbon fiber fabric compounded with an epoxy resin to form a prepreg;
The stab-resistant sheet or the strap is prepared by hot press molding 6-12 layers of prepregs.
5. The flexible, crimpable and lap joint type stab resistant layer of claim 1, wherein the adhesive used in the bonding is at least one of glue prepared from acrylate emulsion and curing agent, moisture curing reactive polyurethane hot melt adhesive and epoxy resin glue;
The mass ratio of the acrylic latex to the curing agent is 10 (0.8-1).
6. The flexible, crimpable and lap joint type stab resistant layer of claim 1 wherein said protective sleeve is a waterproof and breathable fabric formed by a woven fabric woven from polyamide yarns bonded to a waterproof and breathable film.
7. A method of producing a flexible, crimpable lap-joint stab-resistant layer according to any of claims 1-6, said method comprising:
Hot-press molding the multi-layer aramid fiber fabric prepreg or the carbon fiber fabric prepreg to obtain a composite material flat plate, and cutting the composite material flat plate to obtain the stab-resistant sheet and the bonding sheet;
Coating adhesive on the stab-resistant base cloth to bond the stab-resistant sheet on the stab-resistant base cloth, brushing adhesive on the edge of the stab-resistant sheet to bond part of the area of the bonding sheet on the stab-resistant sheet, and overlapping the other part of the area of the bonding sheet on the adjacent stab-resistant sheet to obtain the stab-resistant layer inner core;
and placing the stab-resistant inner core in the protective sleeve, and performing heat sealing to finally obtain the stab-resistant layer.
8. The method for preparing the flexible and curlable overlap joint type anti-prick layer according to claim 7, wherein when the adhesive is a glue prepared from acrylate emulsion and a curing agent or a moisture curing reaction type polyurethane hot melt adhesive, the anti-prick sheet is uniformly covered on the glued anti-prick base cloth, and the anti-prick sheet and the anti-prick base cloth are bonded after the adhesive is kept at the temperature of 60-80 ℃ and the pressure of 0.1-1.0MPa for 0.5-1.0 hour.
9. The method of producing a flexible, crimpable, lap joint type stab resistant layer of claim 7, wherein said stab resistant sheet and strap are obtained by cutting said composite flat plate using a laser or water knife.
10. The stab-resistant garment is characterized in that the stab-resistant garment is obtained by arranging the stab-resistant layer in a stab-resistant area of an outer sleeve of the stab-resistant garment, stab-resistant base cloth of an inner core of the stab-resistant layer faces towards the inner side of a body, and bonding tabs of the inner core of the stab-resistant layer face towards the outer side.
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