CN115847994A - Manufacturing method of high-silk-content bulletproof non-woven fabric - Google Patents
Manufacturing method of high-silk-content bulletproof non-woven fabric Download PDFInfo
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Abstract
The invention provides a method for manufacturing bulletproof weftless fabric with high silk content, which comprises the following steps: a) Spreading a plurality of groups of ultrahigh molecular weight polyethylene fibers at equal intervals in parallel, and spreading to obtain uniformly spread fibers; then carrying out hot-pressing compounding on the uniformly spread fibers and the hot-melt adhesive film to obtain a unidirectional sheet; b) Cutting the unidirectional sheet obtained in the step a) into intermittent sheets, orthogonally compounding the intermittent sheets onto a continuous unidirectional sheet to obtain two orthogonal weftless fabrics, and further performing multilayer orthogonal compounding to obtain the high-filament-content bulletproof weftless fabric. The manufacturing method adopts the mode of hot melt adhesive film to glue and prepare the bulletproof non-woven cloth, the yarn spreading is more uniform, the gluing amount is more controllable and more uniform, the yarn containing rate of the non-woven cloth is higher, and the fiber utilization rate of the non-woven cloth with high yarn containing rate is higher; finally, because of hot-pressing consolidation forming, the manufacturing method is cleaner and more environment-friendly, because solvents such as water and the like are not needed, the production environment is greatly improved, and the energy consumption is reduced.
Description
Technical Field
The invention relates to the technical field of bulletproof products, in particular to a method for manufacturing bulletproof non-woven cloth with high silk content.
Background
Ballistic resistant articles such as ballistic vests, ballistic chest inserts, ballistic helmets, ballistic shields, structural ballistic protection on military equipment such as ships, armored vehicles and helicopters, and vehicle liners, fibers including aramid fibers, ultra high molecular weight polyethylene fibers, S2 glass fibers, and the like are often used. For many applications, such as bulletproof vests or layers of bulletproof vests, fibers are used in woven or laid fabrics. For the ultra-high molecular weight polyethylene fibers, the unidirectional parallel spreading fibers are pre-soaked in a resin matrix and are orthogonally shaped into a non-woven fabric.
In the prior art, unidirectional fabric (non-woven fabric) technology is generally used for preparing the ultra-high molecular weight polyethylene bulletproof cloth. This technology was first introduced by the company of american allied-signalinc (incorporated by honeywell in 1990). In this technique (see patent No. US 4916000), a process for the preparation of a bulletproof weftless fabric is disclosed, in which a spreading unit spreads the fibers side by side in parallel, with a thickness close to the diameter of the fibers; the spread unidirectional fiber is glued by glue coating modes such as dip coating, spray coating and the like; drying the glued fiber layer on a support medium such as release paper by a hot air box, and rolling; then making a plurality of layers of orthogonal sheets, wherein two adjacent layers form a structure of approximate 0/90 degrees; and attaching a low density polyethylene film to the outer layer. The filament content of the final non-woven fabric is about 74% (see figure 1).
In the actual production of the bulletproof non-woven cloth, the defects of uneven fiber spreading, uneven fiber tension, uneven fiber gluing, unclean environment protection, difficult resin cleaning, large drying energy consumption and the like are caused by certain factors. Through research, the reason is that in the fiber spreading stage, the fiber loosening degree is poor, the fiber tension is inconsistent, and the surface density of the fiber and the resin is not uniform after the fiber passes through a glue groove; and because the resin used as the adhesive is solvent-based resin or water-based resin, the adhesive has the defects of equipment adhesion, solvent removal, difficult cleaning, peculiar smell and the like. These greatly affect production efficiency and product quality.
Nowadays, many people research how to better impregnate fibers with solvent-based or water-based resins to prepare bulletproof non-woven fabrics, but the research is very important for engineering production, and how to improve the cleanness and environment-friendly production of products is less.
EP0116845A2 discloses a process for producing polyethylene laid fabrics, which comprises: applying pressure to the laid fabric for a sufficient period of time between 100 ℃ and 160 ℃ to bond adjacent fibers; this document discloses that good ballistic performance can be obtained even if the fibers are heated above their melting temperature; applying high pressure and/or for a period of time to deform the fibers to substantially eliminate voids, thereby creating a film-like laid fabric; embodiments related to ballistic resistant materials include multi-layer laid fabrics (such laid fabrics comprise a plurality of continuous unidirectional fiber layers at 0/90 ° and HDPE films). In actual production, continuous production is needed, and the limited method in the patent is formed by winding and then molding an aluminum plate, which is unrealistic and extremely difficult to operate in actual production. In addition, the HDPE films in the patent have poor fiber-to-fiber permeability and cannot be made into multilayer orthogonal soft bulletproof weftless fabrics.
In summary, the prior art has the following disadvantages: solvent type resin or water-based resin is adopted for gluing, so that the fiber is uneven in spreading, uneven in tension, uneven in gluing, not clean and environment-friendly, difficult in resin cleaning and large in drying energy consumption; the adoption of HDPE film for gluing has the disadvantages of incapability of continuous production, low production efficiency, poor permeability of HDPE film and incapability of processing the HDPE film into multi-layer structure non-woven cloth.
Disclosure of Invention
In view of the above, the invention aims to provide a method for manufacturing a bulletproof non-woven fabric with high silk content, which is characterized in that the bulletproof non-woven fabric is manufactured by gluing in a hot melt adhesive film manner, so that the production efficiency is improved, the cleanness and the environmental friendliness are improved, and the energy consumption is reduced.
The invention provides a method for manufacturing high-silk-content bulletproof weftless fabric, which comprises the following steps:
a) Spreading a plurality of groups of ultra-high molecular weight polyethylene fibers in parallel at equal intervals, and spreading to obtain uniformly spread fibers; then carrying out hot-pressing compounding on the uniformly spread fibers and the hot-melt adhesive film to obtain a unidirectional sheet;
b) Cutting the unidirectional sheet obtained in the step a) into intermittent sheets, orthogonally compounding the intermittent sheets onto a continuous unidirectional sheet to obtain two orthogonal weftless fabrics, and further performing multilayer orthogonal compounding to obtain the high-silk-content bulletproof weftless fabric.
Preferably, the titer of the ultra-high molecular weight polyethylene fiber in the step a) is 300D-1600D, the tensile strength is 30 cN/dtex-50 cN/dtex, and the tensile modulus is 1000 cN/dtex-2000 cN/dtex.
Preferably, the process of spreading the plurality of groups of ultra-high molecular weight polyethylene fibers in parallel at equal intervals in step a) specifically comprises:
placing a plurality of rolls of ultra-high molecular weight polyethylene fibers on a creel, sequentially passing through a bundling frame, a roller and a reed, and spreading the fibers at equal intervals in parallel, wherein the interval is 2-10 mm, and the whole width is 1.2-1.6 m.
Preferably, the process of spreading the filaments in the step a) is specifically as follows:
and (3) spreading the fiber bundle to the width of 2-10 mm by adopting a fiber spreading device to obtain uniformly spread fibers.
Preferably, the hot-melt adhesive film in the step a) is a thermoplastic adhesive film; the surface density of the hot melt adhesive film is 1g/m 2 ～15g/m 2 。
Preferably, the hot-press compounding process in the step a) specifically comprises the following steps:
feeding the uniformly spread fibers and the hot melt adhesive film into a double-belt press for hot-pressing compounding, and rolling the fibers and the hot melt adhesive film into a one-way sheet after passing through a drafting machine;
or the like, or, alternatively,
and (3) feeding the uniformly spread fibers into a double-belt press to be hot-pressed into a PE film, feeding the PE film and a hot melt adhesive film into the other double-belt press together to be hot-pressed and compounded, and finally winding the PE film and the hot melt adhesive film into a one-way sheet after passing through a drafting machine.
Preferably, the double belt press comprises a heating zone and a cooling zone; the temperature of the heating area is 98-150 ℃, and the temperature of the cooling area is 35-45 ℃; the pressure of the double-belt press is 0.2 MPa-0.8 MPa.
Preferably, the process of orthogonal compounding in step b) specifically comprises:
cutting one roll of continuous unidirectional sheet obtained in the step a) into intermittent sheets with the length same as the width of the unidirectional sheet, and enabling the intermittent sheets to be orthogonal to another roll of continuous unidirectional sheet on a compound machine in a hot pressing mode to obtain two orthogonal continuous non-woven fabrics.
Preferably, the temperature of the orthogonal compounding in the step b) is 95-120 ℃, and the pressure is 0.2-0.8 MPa.
Preferably, the number of layers of the multilayer orthogonal composite in the step b) is 2-12.
The invention provides a method for manufacturing high-silk-content bulletproof weftless fabric, which comprises the following steps: a) Spreading a plurality of groups of ultrahigh molecular weight polyethylene fibers at equal intervals in parallel, and spreading to obtain uniformly spread fibers; then carrying out hot-pressing compounding on the uniformly spread fibers and the hot-melt adhesive film to obtain a unidirectional sheet; b) Cutting the unidirectional sheet obtained in the step a) into intermittent sheets, orthogonally compounding the intermittent sheets onto a continuous unidirectional sheet to obtain two orthogonal weftless fabrics, and further performing multilayer orthogonal compounding to obtain the high-filament-content bulletproof weftless fabric. Compared with the prior art, the manufacturing method provided by the invention adopts a hot melt adhesive film to glue to prepare the bulletproof non-woven fabric, the gluing mode of the fibers in the filament spreading system and the hot pressing system is improved, on one hand, the filament spreading is more uniform, on the other hand, the gluing amount is more controllable and more uniform, the filament containing rate of the non-woven fabric is higher, and the fiber utilization rate of the non-woven fabric with high filament containing rate is higher; finally, because of hot-pressing consolidation forming, the manufacturing method is cleaner and more environment-friendly, because solvents such as water and the like are not needed, the production environment is greatly improved, and the energy consumption is reduced.
Meanwhile, the manufacturing method provided by the invention can realize continuous production, has high production efficiency, can be processed into multi-layer weftless fabric, and has wide development prospect.
Drawings
FIG. 1 is a production flow chart of a non-woven fabric in the prior art;
FIG. 2 is a flow chart of a preferred embodiment of a method of manufacturing a unidirectional sheet according to the present invention;
FIG. 3 is a flow chart of the method for manufacturing a unidirectional sheet according to another preferred embodiment of the present invention;
fig. 4 is a schematic diagram of an orthogonal process in the manufacturing method provided by the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely below with reference to embodiments of the present invention, and it should be apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a method for manufacturing bulletproof weftless fabric with high silk content, which comprises the following steps:
a) Spreading a plurality of groups of ultrahigh molecular weight polyethylene fibers at equal intervals in parallel, and spreading to obtain uniformly spread fibers; then carrying out hot-pressing compounding on the uniformly spread fibers and the hot-melt adhesive film to obtain a unidirectional sheet;
b) Cutting the unidirectional sheet obtained in the step a) into intermittent sheets, orthogonally compounding the intermittent sheets onto a continuous unidirectional sheet to obtain two orthogonal weftless fabrics, and further performing multilayer orthogonal compounding to obtain the high-silk-content bulletproof weftless fabric.
The invention firstly spreads a plurality of groups of ultra-high molecular weight polyethylene fibers in parallel at equal intervals, and then spreads the fibers to obtain uniformly spread fibers. In the present invention, the fineness of the ultrahigh molecular weight polyethylene fiber is preferably 300D to 1600D, more preferably 350D to 1600D, and still more preferably 700D; the tensile strength of the ultra-high molecular weight polyethylene fiber is preferably 30cN/dtex to 50cN/dtex, more preferably 37cN/dtex to 40cN/dtex; the tensile modulus of the ultra-high molecular weight polyethylene fiber is preferably 1000cN/dtex to 2000cN/dtex, more preferably 1400cN/dtex to 1500cN/dtex. The source of the ultra-high molecular weight polyethylene fiber is not particularly limited in the present invention, and commercially available products well known to those skilled in the art may be used.
In the invention, the preferable process of spreading the plurality of groups of ultra-high molecular weight polyethylene fibers in parallel at equal intervals is as follows:
placing a plurality of rolls of ultra-high molecular weight polyethylene fibers on a creel, and after sequentially passing through a bundling frame, a roller and a reed, spreading the fibers in parallel at equal intervals, wherein the intervals are 2-10 mm, and the whole width is 1.2-1.6 m;
more preferably:
placing a plurality of rolls of ultra-high molecular weight polyethylene fibers on a six-layer creel, and after sequentially passing through a bundling frame, a roller and a reed, spreading the fibers at equal intervals in parallel, wherein the interval is 6mm, and the whole width is 1.6m.
In the invention, the distance between the creel and the creel is preferably 2m to 8m, and more preferably 5m; the distance between the roller and the bundling frame is preferably 0.5 m-2 m, and more preferably 1m; the distance between the reed and the roller is preferably 0.5m, more preferably 0.2m to 0.8m.
In the present invention, the process of filament spreading is preferably specifically:
spreading the fiber bundle to a width of 2-10 mm by using a fiber spreading device to obtain uniformly spread fibers;
more preferably:
and spreading the fiber bundle to 6mm width by using a fiber spreading device to obtain uniformly spread fibers. In the invention, the uniformly spread fibers are continuous fibers spread in parallel.
Then, the uniformly spread fibers and the hot melt adhesive film are subjected to hot-pressing compounding to obtain the unidirectional sheet. In the invention, the hot melt adhesive film is preferably a thermoplastic adhesive film, more preferably a polyurethane adhesive film or a polyurethane acrylic adhesive film, and more preferably a polyurethane adhesive film; the source of the hot melt adhesive film is not particularly limited in the present invention, and commercially available products or self-products known to those skilled in the art may be used. In a preferred embodiment of the invention, the uniformly spread fibers are hot-pressed and compounded with a polyurethane adhesive film of the silicone oil paper tape hot melt adhesive or a polyurethane acrylic adhesive film of the silicone oil paper tape hot melt adhesive.
In the present invention, the area density of the hot melt adhesive film is preferably 1g/m 2 ～15g/m 2 More preferably 2g/m 2 ～10g/m 2 More preferably 4g/m 2 ～8g/m 2 。
In the present invention, the hot press compounding process preferably includes:
feeding the uniformly spread fibers and the hot melt adhesive film into a double-belt press for hot-pressing compounding, and rolling the fibers and the hot melt adhesive film into a one-way piece after passing through a drafting machine;
or the like, or, alternatively,
and (3) feeding the uniformly spread fibers into a double-belt press to be hot-pressed into a PE film, feeding the PE film and a hot melt adhesive film into the other double-belt press together to be hot-pressed and compounded, and finally winding the PE film and the hot melt adhesive film into a one-way sheet after passing through a drafting machine.
In a preferred embodiment of the present invention, the thermal compression compounding process specifically includes:
feeding the uniformly spread fibers and the hot melt adhesive film into a double-belt press for hot-pressing compounding, and rolling the fibers and the hot melt adhesive film into a one-way sheet after passing through a drafting machine; the uniformly spread fibers and the hot melt adhesive film directly enter a double-belt press, the temperature of the double-belt press is higher than the melting point of the hot melt adhesive film, the pressure of the double-belt press is applied to the fibers and the film through a conveying belt, the hot melt adhesive film fully penetrates into the fibers, and finally the fibers and the film are wound into a continuous one-way sheet through a drafting machine. On the basis of the above, the flow chart of the unidirectional sheet obtained by the invention is shown in fig. 2.
In another preferred embodiment of the present invention, the thermal press-compounding process specifically includes:
the uniformly spread fibers enter a double-belt press to be hot-pressed into a PE film, then enter another double-belt press together with a hot melt adhesive film to be hot-pressed and compounded, and finally are wound into a one-way sheet after passing through a drafting machine; the method comprises the steps of firstly hot-pressing uniformly spread fibers into a film, feeding the film and a hot melt adhesive film into a double-belt press at a hot-pressing temperature higher than the melting point of the fibers, applying the pressure of the double-belt press to the two films through a conveying belt to enable the two films to fully permeate, and finally winding the two films into a continuous one-way sheet after passing through a drafting machine. On the basis of the above, the flow chart of the unidirectional sheet obtained by the present invention is shown in fig. 3.
In the invention, the double-belt press preferably comprises a heating area and a cooling area, wherein the hot melt adhesive film penetrates into gaps among fibers and the surface of the fibers in the heating area, and the unidirectional sheets are subjected to composite forming in the cold cutting area. In the invention, the temperature of the heating zone is preferably 98-150 ℃, and more preferably 100-148 ℃; the temperature of the cooling zone is preferably 35-45 ℃, and more preferably 40 ℃; the pressure of the double belt press is preferably 0.2MPa to 0.8MPa, and more preferably 0.5MPa.
After the unidirectional sheets are obtained, the obtained unidirectional sheets are cut into intermittent sheets, the intermittent sheets are orthogonally compounded on the continuous unidirectional sheets to obtain two orthogonal laid fabrics, and further the multi-layer orthogonal compounding is carried out to obtain the bulletproof laid fabrics with high silk content.
In the present invention, the process of orthogonal compounding is preferably specifically:
cutting one roll of continuous unidirectional sheet obtained in the step a) into intermittent sheets with the length same as the width of the unidirectional sheet, and enabling the intermittent sheets to be orthogonal to another roll of continuous unidirectional sheet on a compound machine in a hot pressing mode to obtain two orthogonal continuous non-woven fabrics. In the present invention, the schematic view of the orthogonal arrangement of the intermittent sheet material to another continuous roll of unidirectional sheet is shown in fig. 4.
In the invention, the temperature of the orthogonal compounding is preferably 95-120 ℃, and more preferably 100-115 ℃; the pressure of the orthogonal recombination is preferably 0.2MPa to 0.8MPa, and more preferably 0.5MPa.
In the present invention, the number of layers of the multilayer orthogonal composite is preferably 2 to 12, and more preferably 4 to 10.
The manufacturing method provided by the invention adopts a hot melt adhesive film to glue to prepare the bulletproof non-woven fabric, the gluing mode of the fiber in a filament spreading system and a hot pressing system is improved (the prior art adopts a glue dipping mode to glue, resin is dipped and coated between the fiber surface and the fiber and then dried, the hot melt adhesive film is adopted to glue, the resin is directly soaked between the fiber surface and the fiber in a molten state without drying, so that the equipment is clean and environment-friendly, energy-saving and efficient), and the following four points are brought: firstly, the silk spreading is more uniform, for example, the parallel arrangement among the fibers is more fluffy and more uniform; secondly, the gluing amount is more controllable and more uniform; thirdly, the silk content of the non-woven fabric is higher, and the fiber utilization rate of the non-woven fabric with high silk content is higher; fourthly, due to hot-pressing consolidation forming, the production of the non-woven cloth is cleaner and more environment-friendly, because solvents such as water and the like are not needed, the production environment is greatly improved, and the energy consumption is reduced. In addition, the manufacturing method provided by the invention can realize continuous production, has high production efficiency, can be processed into the non-woven fabric with a multilayer structure, and has wide development prospect.
The invention provides a method for manufacturing high-silk-content bulletproof weftless fabric, which comprises the following steps: a) Spreading a plurality of groups of ultrahigh molecular weight polyethylene fibers at equal intervals in parallel, and spreading to obtain uniformly spread fibers; then carrying out hot-pressing compounding on the uniformly spread fibers and the hot-melt adhesive film to obtain a unidirectional sheet; b) Cutting the unidirectional sheet obtained in the step a) into intermittent sheets, orthogonally compounding the intermittent sheets onto a continuous unidirectional sheet to obtain two orthogonal weftless fabrics, and further performing multilayer orthogonal compounding to obtain the high-filament-content bulletproof weftless fabric. Compared with the prior art, the manufacturing method provided by the invention adopts a hot melt adhesive film mode to glue and prepare the bulletproof non-woven cloth, the gluing modes of fibers in the filament spreading system and the hot pressing system are improved, on one hand, the filaments are more uniformly spread, on the other hand, the gluing amount is more controllable and more uniform, the filament content of the non-woven cloth is higher, and the fiber utilization rate of the non-woven cloth with high filament content is higher; finally, because of hot-pressing consolidation forming, the manufacturing method is cleaner and more environment-friendly, because solvents such as water and the like are not needed, the production environment is greatly improved, and the energy consumption is reduced.
Meanwhile, the manufacturing method provided by the invention can realize continuous production, has high production efficiency, can be processed into multi-layer weftless fabric, and has wide development prospect.
To further illustrate the present invention, the following examples are provided for illustration.
Example 1
Putting 283 reels of ultra-high molecular weight polyethylene fiber (TM 37, the fineness is 700D, the tensile strength is 37cN/dtex, the tensile modulus is 1400 cN/dtex) on a six-layer creel, sequentially passing through a bundling frame, a roller and a reed, wherein the distance between the bundling frame and the creel is 5m, the distance between the roller and the bundling frame is 1m, the distance between the reed and the roller is 0.5m, the fiber is spread in parallel at equal intervals, the interval is 6mm, the whole breadth is 1.6m, then passing through a filament spreading device, the fiber bundles are spread to the width of 6mm, the uniformly spread fiber and a polyurethane adhesive film of a silicone oil hot melt adhesive enter a double-belt press together, the adhesive film is a self-made hot melt adhesive film, and the surface density is 4g/m 2 And the melting point is 110 ℃, the double-belt press is divided into a heating area and a cooling area, the temperature of the heating area is set to be 115 ℃, the temperature of the cold cutting area is set to be 40 ℃, the pressure is set to be 0.5MPa, the hot melt adhesive film is applied to the fibers and the film through the conveyor belt, the hot melt adhesive film fully permeates between the surfaces of the fibers and the fibers, and finally the hot melt adhesive film is wound into a continuous unidirectional sheet after passing through the drafting machine.
Cutting a roll of continuous unidirectional sheets into intermittent sheets with the length of 1.6m, namely, cutting the sheets, and crossing the cut sheets to another roll of continuous unidirectional sheets in a hot pressing mode (the temperature is 115 ℃ and the pressure is 0.5 MPa) on a compound machine to obtain the bi-crossing continuous non-woven fabric. 2-12 layers of orthogonal composite continuous non-woven cloth can be prepared by the method.
The four-orthogonal weftless fabric is prepared, and the surface density is 157g/m 2 The silk content is 90%, the silk spreading is uniform, the gluing is uniform, and the silk content is high.
And (3) orthogonally paving 89 layers of four orthogonal laid fabrics, putting the fabrics into a molding press to be pressed into a single-curved-surface inserting plate, wherein the pressing process of the molding press is 125 ℃/30MPa/30 min, cooling to 40 ℃, and taking out. The V50 values of the plaques were tested with AK47 MSC rifle ammunition, with a V50 value of 785m/s and a standard deviation of 6m/s.
Example 2
Putting 283 reels of ultra-high molecular weight polyethylene fiber (TM 37, fineness of 700D, tensile strength of 40cN/dtex, tensile modulus of 1500 cN/dtex) on a six-layer creel, and sequentially passing through a bundling frame, a roller and a reed, wherein the distance between the bundling frame and the creel is 5m, and the roller is arranged on the rollerThe distance between the fiber bundle and a bundling frame is 1m, the distance between a reed and a roller is 0.5m, the fibers are spread in parallel at equal intervals, the intervals are 6mm, the whole width is 1.6m, then the fiber bundles are spread to the width of 6mm through a filament spreading device, the uniformly spread fibers enter a double-belt press together with a polyurethane adhesive film of a silicone oil paper tape hot melt adhesive, the polyurethane adhesive film is a self-made hot melt adhesive film, and the surface density of the polyurethane adhesive film is 4g/m 2 And the melting point is 110 ℃, the double-belt press is divided into a heating area and a cooling area, the temperature of the heating area is set to be 115 ℃, the temperature of the cold cutting area is set to be 40 ℃, the pressure is set to be 0.5MPa, the hot melt adhesive film is applied to the fibers and the film through the conveyor belt, the hot melt adhesive film fully permeates between the surfaces of the fibers and the fibers, and finally the hot melt adhesive film is wound into a continuous unidirectional sheet after passing through the drafting machine.
A roll of continuous unidirectional sheets is cut into intermittent sheets with the length of 1.6m, namely, cut sheets, and the cut sheets are orthogonalized on another roll of continuous unidirectional sheets on a compound machine in a hot pressing mode (the temperature is 115 ℃, and the pressure is 0.5 MPa), so that the biorthogonal continuous weftless fabric is obtained. The method can prepare 2-12 layers of orthogonal composite continuous non-woven cloth.
The four-orthogonal weftless fabric is prepared, and the surface density is 157g/m 2 The silk content is 90%, the silk spreading is uniform, the gluing is uniform, and the silk content is high.
And (3) orthogonally paving 89 layers of four orthogonal laid fabrics, putting the fabrics into a molding press to be pressed into a single-curved-surface inserting plate, wherein the pressing process of the molding press is 125 ℃/30MPa/30 min, cooling to 40 ℃, and taking out. The V50 values of the plaques were tested with AK47 MSC rifle ammunition, with V50 values of 845m/s and a standard deviation of 5m/s.
Example 3
Putting 283 reels of ultra-high molecular weight polyethylene fiber (TM 40, the fineness is 700D, the tensile strength is 40cN/dtex, the tensile modulus is 1500 cN/dtex) on a six-layer creel, sequentially passing through a bundling frame, a roller and a reed, wherein the distance between the bundling frame and the creel is 5m, the distance between the roller and the bundling frame is 1m, the distance between the reed and the roller is 0.5m, the fiber is spread in parallel at equal intervals, the interval is 6mm, the whole width is 1.6m, then passing through a filament spreading device, the fiber bundles are spread to the width of 6mm, the uniformly spread fiber and the polyurethane acrylic acid adhesive film of the silicone oil hot melt adhesive tape are spread togetherEntering a double-belt press, wherein the polyurethane acrylic acid compound adhesive film is a self-made hot melt adhesive film with the surface density of 8g/m 2 And the melting point is 90 ℃, the double-belt press is divided into a heating area and a cooling area, the temperature of the heating area is set to be 100 ℃, the temperature of the cold cutting area is set to be 40 ℃, the pressure is set to be 0.5MPa, the hot melt adhesive film is applied to the fibers and the film through the conveyor belt, the hot melt adhesive film fully permeates between the surfaces of the fibers and the fibers, and finally the fibers are wound into a continuous unidirectional sheet after passing through the drawing machine.
A roll of continuous unidirectional sheets is cut into intermittent sheets with the length of 1.6m, namely, cut sheets, and the cut sheets are orthogonalized on another roll of continuous unidirectional sheets on a compound machine in a hot pressing mode (the temperature is 100 ℃, and the pressure is 0.5 MPa), so that the biorthogonal continuous weftless fabric is obtained. The method can prepare 2-12 layers of orthogonal composite continuous non-woven cloth.
The four-orthogonal no-woven cloth is prepared, and the surface density is 172g/m 2 The silk content is 82%, the silk spreading is uniform, the gluing is uniform, and the silk content is low.
And (3) orthogonally paving 81 layers of four orthogonal laid fabrics, putting the fabrics into a molding press to be pressed into a single-curved-surface inserting plate, wherein the pressing process of the molding press is 125 ℃/30MPa/30 min, cooling to 40 ℃, and taking out. The V50 values of the plaques were tested with AK47 MSC rifle ammunition, with a V50 value of 790m/s and a standard deviation of 8m/s.
Example 4
Putting 283 rolls of ultra-high molecular weight polyethylene fiber (TM 37, the fineness is 700D, the tensile strength is 37cN/dtex, and the tensile modulus is 1400 cN/dtex) on a six-layer creel, sequentially passing through a bundling frame, a roller and a reed, wherein the distance between the bundling frame and the creel is 5m, the distance between the roller and the bundling frame is 1m, the distance between the reed and the roller is 0.5m, the fiber is spread in parallel at equal intervals, the interval is 6mm, the whole width is 1.6m, then passing through a filament spreading device, the fiber bundle is spread to 6mm width, the uniformly spread fiber firstly enters a double-belt steel belt press only with a heating area to melt and heat-press the fiber into a film shape, the temperature of the press is set to 148 ℃, the pressure is set to 0.5MPa, then the prepared PE film and a polyurethane film of a silicone oil paper belt hot melt adhesive enter the next double-belt press together, the polyurethane film is a self-made hot melt adhesive film, and the surface density of the polyurethane film is 4g/m 2 And the melting point is 110 ℃, the double-belt press is divided into a heating area and a cooling area, the temperature of the heating area is set to be 115 ℃, the temperature of the cold cutting area is set to be 40 ℃, the pressure is set to be 0.5MPa, the hot melt adhesive film is applied to the fibers and the film through the conveyor belt, the hot melt adhesive film fully permeates between the surfaces of the fibers and the fibers, and finally the hot melt adhesive film is wound into a continuous unidirectional sheet after passing through the drafting machine.
Cutting a roll of continuous unidirectional sheets into intermittent sheets with the length of 1.6m, namely, cutting the sheets, and crossing the cut sheets to another roll of continuous unidirectional sheets in a hot pressing mode (the temperature is 115 ℃ and the pressure is 0.5 MPa) on a compound machine to obtain the bi-crossing continuous non-woven fabric. The method can prepare 2-12 layers of orthogonal composite continuous non-woven cloth.
The four-orthogonal weftless fabric is prepared, and the surface density is 157g/m 2 The silk content is 90%, the silk spreading is uniform, the gluing is uniform, and the silk content is high.
And (3) orthogonally paving 89 layers of four orthogonal laid fabrics, putting the fabrics into a molding press to be pressed into a single-curved-surface inserting plate, wherein the pressing process of the molding press is 125 ℃/30MPa/30 min, cooling to 40 ℃, and taking out. The V50 value of the plaques tested with AK47 MSC rifle ammunition was 860m/s with a standard deviation of 8m/s.
Comparative example 1
Putting 283 reels of ultra-high molecular weight polyethylene fiber (TM 40, the fineness is 700D, the tensile strength is 40cN/dtex, and the tensile modulus is 1500 cN/dtex) on a six-layer creel, sequentially passing through a bundling frame, a roller and a reed, wherein the distance between the bundling frame and the creel is 5m, the distance between the roller and the bundling frame is 1m, the distance between the reed and the roller is 0.5m, the fiber is spread in parallel at equal intervals, the fiber interval is 6mm, and the whole width is 1.6m, then passing through a filament spreading device to spread the fiber bundle to the width of 6mm, spreading the uniform fiber, carrying out gum dipping through a gum tank, using a polyurethane dispersion liquid (DispercollU 54), then entering into an oven for drying, and forming continuous unidirectional weftless cloth under the traction of a five-roller drafting machine.
Cutting a roll of continuous unidirectional sheets into intermittent sheets with the length of 1.6m, namely, cutting the sheets, and crossing the cut sheets to another roll of continuous unidirectional sheets in a hot pressing mode (the temperature is 110 ℃ and the pressure is 0.5 MPa) on a compound machine to obtain the bi-crossing continuous non-woven fabric. The method can prepare 2-12 layers of orthogonal composite continuous non-woven cloth.
The four-orthogonal no-weft cloth is prepared, and the surface density is 160g/m 2 The silk content is 82%, the silk spreading is not uniform, the gluing is not uniform, the silk content is low, the environment is not protected, and the glue solution is stuck on equipment and needs to be cleaned regularly and is difficult to clean.
And (3) orthogonally overlapping 88 layers of four-orthogonal laid cloth, putting the four-orthogonal laid cloth into a molding press to be pressed into a single-curved-surface inserting plate, wherein the pressing process of the molding press is 125 ℃/30MPa/30 minutes, cooling to 40 ℃, and taking out. The V50 values of the plaques were tested with AK47 MSC rifle ammunition, with a V50 value of 780m/s and a standard deviation of 20m/s.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A manufacturing method of high-silk-content bulletproof non-woven cloth comprises the following steps:
a) Spreading a plurality of groups of ultrahigh molecular weight polyethylene fibers at equal intervals in parallel, and spreading to obtain uniformly spread fibers; then carrying out hot-pressing compounding on the uniformly spread fibers and the hot-melt adhesive film to obtain a unidirectional sheet;
b) Cutting the unidirectional sheet obtained in the step a) into intermittent sheets, orthogonally compounding the intermittent sheets onto a continuous unidirectional sheet to obtain two orthogonal weftless fabrics, and further performing multilayer orthogonal compounding to obtain the high-silk-content bulletproof weftless fabric.
2. The method for manufacturing the bulletproof weftless fabric with high filament content according to claim 1, wherein the titer of the ultra-high molecular weight polyethylene fiber in the step a) is 300D to 1600D, the tensile strength is 30cN/dtex to 50cN/dtex, and the tensile modulus is 1000cN/dtex to 2000cN/dtex.
3. The method for manufacturing the bulletproof weftless fabric with high silk content according to claim 1, wherein the process of spreading the groups of ultra-high molecular weight polyethylene fibers equidistantly and parallelly in step a) is specifically as follows:
placing a plurality of rolls of ultra-high molecular weight polyethylene fibers on a creel, sequentially passing through a bundling frame, a roller and a reed, and spreading the fibers at equal intervals in parallel, wherein the interval is 2-10 mm, and the whole width is 1.2-1.6 m.
4. The method for manufacturing the bulletproof weftless fabric with high filament content according to claim 1, wherein the process of filament spreading in the step a) is specifically as follows:
and (3) spreading the fiber bundle to the width of 2-10 mm by adopting a fiber spreading device to obtain uniformly spread fibers.
5. The method for manufacturing the bulletproof weftless fabric with high filament content according to claim 1, wherein the hot melt adhesive film in the step a) is a thermoplastic adhesive film; the surface density of the hot melt adhesive film is 1g/m 2 ～15g/m 2 。
6. The method for manufacturing the high-filament-content bulletproof weftless fabric according to claim 1, wherein the hot-press compounding process in the step a) is specifically as follows:
feeding the uniformly spread fibers and the hot melt adhesive film into a double-belt press for hot-pressing compounding, and rolling the fibers and the hot melt adhesive film into a one-way piece after passing through a drafting machine;
or the like, or a combination thereof,
and (3) feeding the uniformly spread fibers into a double-belt press to be hot-pressed into a PE film, feeding the PE film and a hot melt adhesive film into the other double-belt press together to be hot-pressed and compounded, and finally winding the PE film and the hot melt adhesive film into a one-way sheet after passing through a drafting machine.
7. The method of making a high-filament-content ballistic resistant laid fabric according to claim 6 wherein the double belt press comprises a heating zone and a cooling zone; the temperature of the heating area is 98-150 ℃, and the temperature of the cooling area is 35-45 ℃; the pressure of the double-belt press is 0.2 MPa-0.8 MPa.
8. The method for manufacturing the bulletproof weftless fabric with high filament content according to claim 1, wherein the process of the orthogonal compounding in the step b) is specifically as follows:
cutting one roll of continuous unidirectional sheet obtained in the step a) into intermittent sheets with the length same as the width of the unidirectional sheet, and enabling the intermittent sheets to be orthogonal to another roll of continuous unidirectional sheet on a compound machine in a hot pressing mode to obtain two orthogonal continuous non-woven fabrics.
9. The method for manufacturing the bulletproof weftless fabric with high filament content according to claim 1, wherein the temperature of the orthogonal compounding in the step b) is 95 ℃ to 120 ℃ and the pressure is 0.2MPa to 0.8MPa.
10. The method of claim 1 wherein the number of layers of the multi-layer orthorhombic composite in step b) is 2 to 12.
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