CN110978541A - Protective material formed by bonding discrete resin and preparation method thereof - Google Patents
Protective material formed by bonding discrete resin and preparation method thereof Download PDFInfo
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- CN110978541A CN110978541A CN201911369195.6A CN201911369195A CN110978541A CN 110978541 A CN110978541 A CN 110978541A CN 201911369195 A CN201911369195 A CN 201911369195A CN 110978541 A CN110978541 A CN 110978541A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
- B29C65/7802—Positioning the parts to be joined, e.g. aligning, indexing or centring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/47—Joining single elements to sheets, plates or other substantially flat surfaces
- B29C66/474—Joining single elements to sheets, plates or other substantially flat surfaces said single elements being substantially non-flat
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Abstract
The invention relates to a protective material formed by bonding discrete resin and a preparation method thereof, wherein the preparation method comprises the following steps: s1: uniformly distributing resin particles in a flat plate-shaped forming die; s2: placing a metal frame with a metal mesh bottom surface on the forming die in S1, and turning the metal frame by using a turning device to transfer the distributed resin particles into the metal frame; s3: uniformly spraying a binder on the resin particles in the metal frame in S2, and heating for precuring; s4: and (6) paving a base fabric on the surface of the metal frame in the S3, heating and curing, and taking out the base fabric from the metal frame to obtain the discrete resin bonding-molded protective material. The preparation method adopts a discrete resin bonding forming process, so that clear gaps among resin particles are ensured, and the resin particles are soft and have excellent air permeability; adopt dull and stereotyped forming die can carry out customization production according to customer's demand, reduced protective material tailor the cutting process, improved the production efficiency that the protective product was dressed at the terminal.
Description
Technical Field
The invention relates to the field of functional protective materials and manufacturing processes thereof, in particular to a protective material formed by bonding discrete resin and a preparation method thereof.
Background
In recent years, people are more aware of the importance of self safety protection, and the protection consciousness is gradually improved in daily life of individuals and in the industrial fields of machining, slaughtering, building and the like. In particular, in some heavy industrial fields, workers frequently contact with hard materials such as steel, glass, plates and the like, and are easily injured. When the special work is carried out, the corresponding personal protection equipment must be worn, and more enterprises and individuals gradually strengthen self-protection. In addition, public security, assistant policemen and dry policemen including common people also need the protective clothing to resist the attack of gangsters and avoid personal injury in ordinary life.
The patent CN101125040A discloses a composite stab-resistant fabric and a preparation method thereof, the composite stab-resistant fabric is composed of a fabric and coating points, the coating points are bonded on the front surface of the fabric, a plurality of coating points form a protective coating dot matrix, the preparation process adopts a funnel mold arranged on a roller, and protective materials are bonded on the fabric through a group of calandria of the mold. The composite stab-resistant fabric prepared by the process is efficient in production, but resin is easily connected into a piece, and gaps are lost. Patent CN101646556A discloses an integral flexible composite protective material which is provided with a clearly visible pattern guard on a base fabric, said guard being a small, non-overlapping, piece of printed resin material. The material has a certain anti-cutting function, but the production process is complex and the production efficiency is low. Patent CN104501659A discloses a bonding and molding method of flexible stab-resistant material, which comprises uniformly dispersing particles in each module of a mold, fixing a film correspondingly, uniformly coating a binder on the particles, tearing off the film, laying a fabric, heating and curing to obtain a soft and breathable stab-resistant material. However, in this production process, the film is not easily fixed, and the particles are easily stuck together by the residual binder, which reduces the flexibility and air permeability of the stab-resistant material.
Disclosure of Invention
The invention aims to provide a protective material formed by bonding discrete resin and a preparation method thereof, aiming at the problems of poor fabric softness and air permeability caused by the fact that the existing stab-resistant fabric is connected into a piece of resin or low production efficiency caused by the complex production process.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a preparation method of a protective material formed by bonding discrete resins, which comprises the following steps:
s1: uniformly distributing resin particles in a flat plate-shaped forming die;
s2: placing a metal frame with a metal mesh bottom surface on the forming die in S1, and turning the metal frame by using a turning device to transfer the distributed resin particles into the metal frame;
s3: uniformly spraying a binder on the resin particles in the metal frame in the step S2, and heating for precuring;
s4: and (5) placing the metal frame in the step S3 on a pressing machine, paving a base fabric on the surface of the metal frame, heating and curing, and taking out the base fabric from the metal frame to obtain the discrete resin bonding molded protective material.
Further, the thickness of the forming die is 3-100mm, the length is 100-; a plurality of small holes are uniformly distributed on the forming die, the distance between the small holes is 0.1-5mm, and the hole depth is 0.6-5 mm; the horizontal plane size of the small hole is that the distance between any two points is 1-20 mm.
Further preferably, the pattern formed by the small holes is a triangle, a quadrangle, a pentagon, a polygon, an irregular pattern or a sleeve shape, a front piece shape, a back piece shape of the clothes or a palm shape of the gloves.
Further, the horizontal plane size of the resin particles is that the distance between any two points is 1-20mm, and the thickness is 1-5 mm; the resin particles are composite reinforced material particles prepared by compounding thermoplastic resin, thermosetting resin or the thermoplastic resin with glass fibers, carbon fibers, aramid fibers and basalt fibers.
Further preferably, the thermoplastic resin is one or more of PP resin, POM resin, PC resin, PA resin, ABS resin, acrylic resin, and polyurethane resin.
Further preferably, the thermosetting resin is an epoxy resin or an acrylic resin.
Furthermore, the resin particles can be added with one or more of reinforcing agent, toughening agent, flame retardant, hard particles, nano particles and color master batch.
Furthermore, the length of the metal frame is 300-.
Further, the conditions of the heating precuring in S3 are: heating at 80-160 deg.C for 0.5-5 min; the conditions for heat curing in S4 are: at the temperature of 110 ℃ and 170 ℃, the time of 15-60s and the pressure of 1-10kg/cm2。
Further, the adhesive is hot-melt resin powder or liquid adhesive; the hot-melt resin powder is one or more of PA, PES, PEA, EVA, PVC, PUR and TPU; the liquid adhesive is one or more of polyurethane, polystyrene, polyacrylic acid and ethylene copolymer.
Furthermore, the base fabric is a fabric woven by one or more fibers and yarns of terylene, chinlon, aramid fiber, glass fiber, ultra-high molecular weight polyethylene fiber, polyimide fiber and polysulfonamide fiber; the fabric is one or more of woven, knitted, non-woven or braided.
The invention provides a protective material formed by bonding discrete resins prepared by the preparation method in a second aspect.
Compared with the prior art, the invention has the following advantages:
1. according to the preparation method, the flat plate forming die is adopted to perform customized production according to the requirements of customers, for example, the die is designed to be in the shape of a clothes sleeve, the protective material with sleeve patterns can be directly produced, the cutting process of the protective material is reduced, the generation of waste materials is reduced, and the production efficiency of the protective product worn by the terminal is improved.
2. The preparation method of the invention adopts the discrete resin bonding forming process, can avoid the adhesion problem caused by the small gaps between the resin particles in the traditional process in the process of curing the resin particles and the base fabric, and ensures that the gaps between the resin particles are clear and the soft air permeability is excellent.
3. The preparation method of the invention does not generate waste water and waste liquid in the production process, and is green and environment-friendly.
4. The protective material has the advantages of high effects of cutting resistance, puncture resistance, wear resistance and impact resistance, comfort, softness, flexibility, ventilation, capability of being folded in any direction and wide application range; the single-layer resin protective material can be applied to the palm and back parts of the cutting-proof gloves, cutting-proof guard arms, cutting-proof aprons and other labor protection products, and can also be applied to the protection fields of riding motorcycle clothes, racing clothes, fencing clothes, lumberjack clothes and the like; 3-20 layers of discrete resin protective materials are laminated and compounded, and the layers are sewn in a staggered mode, so that the stab-resistant armor inner core can be prepared, and the stab-resistant armor inner core comprises stab-resistant waistcoats, stab-resistant vests, stab-resistant coats and other various types of stab-resistant armor and is used for the field personnel of public security officers, on-duty patrols and the like.
Drawings
Fig. 1 is a front view schematically showing a molding die of the present invention.
Detailed Description
The present invention will be described in detail and specifically with reference to the following examples to facilitate better understanding of the present invention, but the following examples do not limit the scope of the present invention.
The invention provides a preparation method of a protective material formed by bonding discrete resin, which comprises the following steps:
s1: preparing a flat plate shape forming die with the plate thickness of 3-100mm, the length of 100-2000mm and the width of 100-2000mm, uniformly distributing a plurality of small holes on the flat plate die, wherein the small holes can be distributed to form various patterns, the gap between the small holes is 0.1-5mm, the hole depth is 0.6-5mm, the size of the hole is the distance between any two points of the horizontal plane size and is 1-20mm, and uniformly distributing resin particles in the small holes of the flat plate die to fill each small hole with the resin particles;
the patterns formed by the small holes are triangular, quadrangular, pentagonal, polygonal, irregular patterns or the shapes of sleeves, front pieces and rear pieces of clothes or the shapes of the palm surfaces of gloves; by adopting the graphic design, customized production can be carried out according to customer requirements, for example, the mold is designed into the shape of a clothes sleeve, the protective material with sleeve patterns can be directly produced, the cutting process of the protective material is reduced, the generation of waste materials is reduced, and the production efficiency of the protective product worn by the terminal is improved.
The horizontal plane size of the adopted resin particles is that the distance between any two points is 1-20mm, and the thickness is 1-5 mm; the resin particles are composite reinforced material particles prepared by compounding thermoplastic resin, thermosetting resin or the thermoplastic resin with glass fibers, carbon fibers, aramid fibers and basalt fibers; the thermoplastic resin is one or more of PP resin, POM resin, PC resin, PA resin, ABS resin, acrylic resin and polyurethane resin; the thermosetting resin is epoxy resin or acrylic resin;
one or more of a reinforcing agent, a toughening agent, a flame retardant, hard particles and nano particles can be added into the resin particles to enhance the performance indexes of the resin particles such as mechanical strength, hardness, toughness and the like after curing; color master can also be added to change the color of the resin particles and improve the aesthetic property of patterns formed by the resin particles.
S2: placing a metal frame with a metal mesh bottom surface on the forming die in S1, and turning the metal frame by using a turning device to transfer the distributed resin particles to the metal mesh bottom surface of the metal frame;
the length of the metal frame is 300-.
S3: uniformly spraying a binder on the resin particles in the metal frame in the step S2, allowing the redundant binder to flow down from meshes of the metal net on the bottom surface of the metal frame to ensure that no redundant binder exists among the resin particles, and heating the adhesive on the resin particles at 80-160 ℃ for 0.5-5min to pre-cure the binder;
the adhesive is hot-melt resin powder or liquid adhesive; the hot melt resin powder is one or more of PA, PES, PEA, EVA, PVC, PUR and TPU; the liquid adhesive is one or more of polyurethane, polystyrene, polyacrylic acid and ethylene copolymer.
S4: placing the metal frame in the S3 on a pressing machine, laying base fabric on the surface of the metal frame, heating and curing, and taking out the base fabric from the metal frame to obtain the protective material formed by bonding discrete resin;
the base cloth fabric is a fabric woven by one or more fibers and yarns of terylene, chinlon, aramid fiber, glass fiber, ultra-high molecular weight polyethylene fiber, polyimide fiber and polysulfonamide fiber; the fabric is one or more of woven, knitted, non-woven or braided.
The invention adopts the discrete resin bonding forming process, can avoid the problem that the gaps among the resin particles are very small and the adhesion problem occurs in the process of curing the resin particles and the base fabric in order to improve the protective performance of the material in the traditional process, and ensures that the gaps among the resin particles are clear and the soft air permeability is excellent.
Example 1
Preparation of a protective material formed by discrete resin bonding:
the die holes on the flat plate forming die are designed into the shape of the front piece of the clothes, the thickness of the flat plate die is 10mm, the length and width of the flat plate die are 70cm multiplied by 60cm, the size of the die holes on the flat plate die is 15mm, the depth of the die holes is 2mm, and the gap between the die holes is 0.5 mm.
Firstly, uniformly distributing round nylon glass fiber particles with the diameter of 14.5mm in die holes of a flat plate die, and filling each hole with the particles. Secondly, the flat plate mould filled with the nylon glass fiber particles is placed on a turnover device, a metal frame of 80cm multiplied by 70cm is placed on the mould, and the resin particles on the mould are transferred to the bottom surface of the metal net of the metal frame by controlling the turnover device. Thirdly, uniformly spraying polyurethane liquid adhesive on the resin particles in the metal frame, allowing the excessive adhesive to flow down from meshes of the metal net on the bottom surface of the metal frame, standing for 3min, heating at 90 ℃ for 1min, pre-curing the polyurethane adhesive, then paving a high-strength nylon base fabric, placing the metal frame on a pressing machine, and applying 3kg/cm at 120 DEG C2And (4) solidifying the resin particles on the nylon base fabric through 40 seconds under pressure. Finally, taking the base cloth from the metal frame to obtain the discrete resin bonding forming protective material。
The 4 layers of the stab-resistant material are staggered and laminated, the edges are sparsely sewn with each other, the stab-resistant vest is manufactured by cutting and processing, the test is carried out according to the GA68-2019 police stab-resistant clothing standard, the standard technical indexes can be reached, the weight of the clothing is only 2.1kg, and the thickness is 8 mm.
Example 2
Preparation of a protective material formed by discrete resin bonding:
the mould holes on the flat plate forming mould are designed into the shapes of the palm surface and the back surface of the glove, the thickness of the flat plate mould is 10mm, the length and width of the flat plate mould are 50cm multiplied by 40cm, the size of the mould holes on the flat plate mould is 4mm, the depth of the mould holes is 0.8mm, and the gap between the mould holes is 0.2 mm.
First, circular polycarbonate pellets having a diameter of 3mm were uniformly distributed in the holes of a flat plate mold, so that each hole was filled with the polycarbonate pellets. Secondly, the flat plate mold filled with the particles is placed on the turnover device, a metal frame of 60cm multiplied by 50cm is placed on the mold, and the resin particles on the mold are transferred to the bottom surface of the metal net of the metal frame by controlling the turnover device. Thirdly, polyester type hot melt adhesive powder is uniformly sprayed on the resin particles on the metal frame, redundant hot melt adhesive powder flows down from meshes of the metal net on the bottom surface of the metal frame, and the adhesive powder on the resin particles is heated for 45s at 120 ℃ so as to be pre-cured. Finally, the metal frame is horizontally placed on a pressing machine, high-strength polyester knitted fabric is laid, and the fabric is heated for 25 seconds at the temperature of 150 ℃ and under the pressure of 5kg/cm2And the polycarbonate particles are solidified on the base fabric. And then taking the base fabric out of the metal frame to obtain the discrete resin bonded protective material.
The single-layer protective material can reach the A7 grade of American standard cutting according to the detection method of ASTM F2992-15. The cut-proof gloves prepared by the protective material have high protection grade, good puncture resistance and better wearing comfort.
Example 3
Preparation of a protective material formed by discrete resin bonding:
the flat plate forming die is designed to be rectangular, the thickness of the flat plate die is 10mm, the length and the width of the flat plate die are respectively 80cm multiplied by 60cm, the size of a die hole on the die is 8mm, the depth of the hole is 1mm, and the gap between the die holes is 0.3 mm.
Firstly, uniformly distributing regular hexagonal polypropylene carbon fiber particles with the size of 7mm in the die holes of a flat plate die, and filling each hole with the polypropylene carbon fiber particles. Secondly, the flat plate mold filled with the particles is placed on the turnover device, a metal frame of 90cm x 70cm is placed on the mold, and the resin particles on the mold are transferred to the bottom surface of the metal net of the metal frame by controlling the turnover device. And thirdly, uniformly spraying PES hot melt adhesive powder on the resin particles on the metal frame, allowing the redundant hot melt adhesive powder to flow down from meshes of the metal net on the bottom surface of the metal frame, and heating the adhesive powder on the resin particles for 45s at the temperature of 140 ℃ to pre-cure the adhesive powder. Finally, the metal frame is horizontally placed on a pressing machine, high-strength aramid plain fabric is laid, and the metal frame is heated for 30s at the temperature of 150 ℃ and under the pressure of 5kg/cm2The polypropylene carbon fiber particles are solidified on the base fabric. And then taking the base fabric out of the metal frame to obtain the discrete resin bonded protective material.
The single-layer protective material is produced according to european EN 388: 2016, to achieve a cut resistance of F. The rectangular protective material with the size of 80 multiplied by 60cm can be cut and processed into products worn by people, such as a cutting-proof protective arm, a cutting-proof apron, cutting-proof clothes and the like according to requirements. The protective product prepared by the protective material has high cut-resistant grade and good puncture resistance, is comfortable and soft to wear, and meets the daily wearing requirements.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (10)
1. A method for preparing a protective material formed by bonding discrete resin is characterized by comprising the following steps:
s1: uniformly distributing resin particles in a flat plate-shaped forming die;
s2: placing a metal frame with a metal mesh bottom surface on the forming die in S1, and turning the metal frame by using a turning device to transfer the distributed resin particles into the metal frame;
s3: uniformly spraying a binder on the resin particles in the metal frame in the step S2, and heating for precuring;
s4: and (5) placing the metal frame in the step S3 on a pressing machine, paving a base fabric on the surface of the metal frame, heating and curing, and taking out the base fabric from the metal frame to obtain the discrete resin bonding molded protective material.
2. The method as claimed in claim 1, wherein the forming mold has a plate thickness of 3-100mm, a length of 100-2000mm and a width of 100-2000 mm; a plurality of small holes are uniformly distributed on the forming die, the distance between the small holes is 0.1-5mm, and the hole depth is 0.6-5 mm; the horizontal plane size of the small hole is that the distance between any two points is 1-20 mm.
3. The method of claim 2, wherein the pattern of the apertures is a triangle, a quadrangle, a pentagon, a polygon, a trapezoid, or a sleeve shape of a garment, a front panel shape, a back panel shape, or a palm shape of a glove.
4. The production method according to claim 1, wherein the resin particles have a horizontal plane size in which a distance between any two points is 1 to 20mm and a thickness is 1 to 5 mm; the resin particles are thermoplastic resin particles, thermosetting resin particles or composite reinforced material particles prepared by compounding the thermoplastic resin with glass fibers, carbon fibers, aramid fibers and basalt fibers.
5. The method as claimed in claim 1, wherein the metal frame has a length of 300-3000mm and a width of 300-3000mm, and the mesh number of the metal mesh on the bottom surface is 10-150 mesh.
6. The method according to claim 1, wherein the conditions for the heat precuring in S3 are: heating at 80-160 deg.C for 0.5-5 min; the conditions for heat curing in S4 are: at the temperature of 110 ℃ and 170 ℃, the time of 15-60s and the pressure of 1-10kg/cm2。
7. The production method according to claim 1, wherein the adhesive is a hot-melt resin powder or a liquid adhesive; the hot-melt resin powder is one or more of PA, PES, PEA, EVA, PVC, PUR and TPU; the liquid adhesive is one or more of polyurethane, polystyrene, polyacrylic acid and ethylene copolymer.
8. The preparation method according to claim 7, wherein the thermoplastic resin is one or more of PP resin, POM resin, PC resin, PA resin, ABS resin, acrylic resin and polyurethane resin; the thermosetting resin is epoxy resin or acrylic resin.
9. The preparation method according to claim 1, wherein the base fabric is a fabric woven from one or more fibers or yarns of terylene, chinlon, aramid fiber, glass fiber, ultra-high molecular weight polyethylene fiber, polyimide fiber and polysulfonamide fiber; the fabric is one or more of woven, knitted, non-woven or braided.
10. A discrete resin bond molded protective material produced by the production method according to any one of claims 1 to 9.
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| CN112659565A (en) * | 2020-12-04 | 2021-04-16 | 安丹达工业技术(上海)有限公司 | Preparation method of flexible anti-cutting and anti-puncturing fabric |
| CN114703678A (en) * | 2022-03-23 | 2022-07-05 | 南通大学 | Wear-resistant and scratch-resistant fabric and forming method thereof |
| CN115572456A (en) * | 2021-07-06 | 2023-01-06 | 南通大学 | Puncture-proof, cutting-proof, comfortable and breathable composite material and preparation method thereof |
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| CN112659565B (en) * | 2020-12-04 | 2022-03-15 | 安丹达工业技术(上海)有限公司 | Preparation method of flexible anti-cutting and anti-puncturing fabric |
| CN115572456A (en) * | 2021-07-06 | 2023-01-06 | 南通大学 | Puncture-proof, cutting-proof, comfortable and breathable composite material and preparation method thereof |
| CN114703678A (en) * | 2022-03-23 | 2022-07-05 | 南通大学 | Wear-resistant and scratch-resistant fabric and forming method thereof |
| CN114703678B (en) * | 2022-03-23 | 2024-04-26 | 南通大学 | Wear-resistant and scratch-resistant fabric and forming method thereof |
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| CN110978541B (en) | 2022-02-11 |
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