CN113201842A - Camouflage stealth barrier material and preparation method thereof - Google Patents
Camouflage stealth barrier material and preparation method thereof Download PDFInfo
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- CN113201842A CN113201842A CN202110506930.4A CN202110506930A CN113201842A CN 113201842 A CN113201842 A CN 113201842A CN 202110506930 A CN202110506930 A CN 202110506930A CN 113201842 A CN113201842 A CN 113201842A
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D13/00—Woven fabrics characterised by the special disposition of the warp or weft threads, e.g. with curved weft threads, with discontinuous warp threads, with diagonal warp or weft
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
- F41H3/00—Camouflage, i.e. means or methods for concealment or disguise
- F41H3/02—Flexible, e.g. fabric covers, e.g. screens, nets characterised by their material or structure
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2101/00—Inorganic fibres
- D10B2101/20—Metallic fibres
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D10B2321/02—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins
- D10B2321/022—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins polypropylene
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D10B2321/10—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polymers of unsaturated nitriles, e.g. polyacrylonitrile, polyvinylidene cyanide
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D10B2321/10—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polymers of unsaturated nitriles, e.g. polyacrylonitrile, polyvinylidene cyanide
- D10B2321/101—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polymers of unsaturated nitriles, e.g. polyacrylonitrile, polyvinylidene cyanide modacrylic
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/02—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/02—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides
- D10B2331/021—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides aromatic polyamides, e.g. aramides
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/14—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polycondensates of cyclic compounds, e.g. polyimides, polybenzimidazoles
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- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
The invention relates to a preparation method of a camouflage stealth barrier material, which comprises the following steps: s1, weaving chemical fiber filaments with high heat shrinkage and metal blended yarns with low shrinkage into latticed base cloth, wherein the middle part of the latticed base cloth is the metal blended yarns, and the four sides of the latticed base cloth are the chemical fiber filaments with high heat shrinkage; the shrinkage rate of the chemical fiber filament is more than 4 times of that of the metal blended yarn; the metal blended yarn is prepared by blending flame-retardant fibers and metal fibers; s2, brushing a functional coating on the surface of the base cloth; and S3, high-temperature setting treatment, wherein the base cloth shrinks at different degrees at high temperature to form the sand hill-shaped protrusions and ravines on the surface. The invention mainly utilizes the material properties and a special weaving process to ensure that the base cloth is naturally contracted and deformed at high temperature to form the surfaces of protrusions and gullies, thereby solving the technical problems of high cost, complicated steps, low efficiency and the like of the existing preparation process.
Description
Technical Field
The invention belongs to the field of stealth materials in electronic materials, and particularly relates to a visible light-infrared-radar camouflage stealth barrier material and a preparation method thereof.
Background
Radar, infrared (near infrared, far infrared), visible light detection technologies are all formed based on the reflection principle. With the development of military technology, once single radar detection technology gradually changes to the multi-band detection direction of visible light, infrared, radar and the like. The emergence of a novel detection technology seriously threatens the survival probability and survival time of weapons on a battlefield, so that visible light, infrared and radar multi-spectrum stealth materials are the key points for developing stealth materials in various countries.
The current ones include both structural and coating types. The invisible material has the structure that a concave-convex (convex and concave) uneven surface is formed on the surface of the material to form multi-dimensional absorption and scattering of electromagnetic waves, so that the invisible material has the effect of preventing the detection of multi-band electromagnetic waves such as visible light, near infrared, far infrared, radar waves and the like. When the material is prepared, the prior method is to use a mould with bulges and depressions on the surface to carry out hot-pressing demoulding after thermoplastic materials are processed. Although the method is feasible, the mold needs to be opened in advance, the cost is high, the preparation process is complicated, the efficiency is low, and for example, when a large piece of stealth material is manufactured, the manufacturing of the large piece of stealth material can be completed only by carrying out hot press forming for many times due to the limited coverage area of the mold. The preparation method is also not suitable for preparing the stealth material containing the metal fibers, because the metal fibers have higher hardness and are easy to arch in the hot pressing process, and the expected effect can be achieved by increasing the pressure of the hot pressing. In addition, when the wave-absorbing/anticorrosive paint is coated on the surface of the material, the defects exist, such as coating before hot pressing, the paint at the contact position of the coating material and a mold is easy to fall off due to higher temperature and pressure during hot pressing, and the coating is easy to miss and leave white due to the uneven surface after hot pressing.
Disclosure of Invention
Technical problem to be solved
In view of the defects and shortcomings of the prior art, the invention provides a preparation method of a camouflage stealth barrier material, which solves the technical problems of high cost, complex steps, low efficiency and the like of the existing structural wave-absorbing material preparation process.
(II) technical scheme
In order to achieve the purpose, the invention adopts the main technical scheme that:
on one hand, the invention provides a preparation method of a camouflage stealth barrier material, which comprises the following steps:
s1, weaving chemical fiber filaments with high heat shrinkage and metal blended yarns with low shrinkage into latticed base cloth, wherein the middle part of the latticed base cloth is the metal blended yarns, and the four sides of the latticed base cloth are the chemical fiber filaments with high heat shrinkage; the shrinkage rate of the chemical fiber filament is more than 4 times of that of the metal blended yarn; the metal blended yarn is prepared by blending flame-retardant fibers and metal fibers;
s2, brushing a functional coating on the surface of the base cloth;
and S3, high-temperature shaping, wherein the base cloth is shaped at the high temperature of 120-140 ℃, each part shrinks to different degrees, and the surface forms sandy-hill-shaped protrusions and ravines.
According to the preferred embodiment of the invention, in the step S1, the metal blended yarn and the chemical fiber filament are woven on the same fabric surface by different weaving methods; in the middle part of the lattice, the weaving method of the metal blended yarn is plain weave or twill weave with one upper part and two lower parts (1/2 twill weave); the four sides of the grid, the weaving method of the chemical fiber filament is two upper parts and two lower parts (2/2) or two upper parts and four lower parts (2/4); the length of the chemical fiber filament floats on the four sides of each lattice is 2-3 times of the length of the metal blended yarn floats on the lattices. This weaving method results in a very loose grid at its four sides and a tight grid at its middle.
According to the preferred embodiment of the invention, in the S1, the mass percentage of the metal fibers in the base fabric is 0.2-9.5%.
According to a preferred embodiment of the present invention, in S2, the coating is one or more of a wave-absorbing material coating, an infrared camouflage masking material coating, an anticorrosive material coating, and a flame retardant material coating, which are stacked/mixed. The wave-absorbing material includes but is not limited to ferrite series, micro powder, polycrystalline ferromagnetic fiber, dielectric ceramic, and conductive fiber. Preferably, the corrosion protection material may be a graphene and/or CNT reinforced polyurethane coating. The coating of the flame-retardant material can be environment-friendly transparent flame-retardant coating glue.
According to the preferred embodiment of the present invention, in S1, the metal blended yarn is prepared as follows:
s11, mixing the flame-retardant fibers and the metal fibers according to a ratio by adopting a strip mixing process to prepare mixed fiber strips, and uniformly blending the fibers by 3-5 drawing processes to prepare fiber strips with the gram weight of 2.6-3.6 g/m;
s12, feeding the fiber strips into a roving process with the draft multiple of 5-7.5 times to obtain roving strips, and twisting the roving strips, wherein the twist is 20-30 twists/m, so that the strength of the roving strips is ensured;
s13, feeding the roving strips into a spinning process for further drafting and twisting to ensure that the yarn is even, wherein the drafting multiple is 28-30 times to obtain spun yarns with the gram weight of 2.0-3.69 g/100 m;
and S14, doubling and twisting 2-4 spun yarns to ensure that the metal fibers are in multi-spiral cohesion with the flame-retardant fibers and increase the curved surface and hairiness of the metal fibers to obtain the metal blended yarn.
The filoplume and the curved surface of the metal fibers can greatly increase the absorption and scattering effects of the stealth material on signals such as radar, visible light, infrared and the like.
According to the preferred embodiment of the invention, in S11, the flame retardant fibers with the mass fraction of 90-99.5% and the metal fibers with the mass fraction of 10-0.5% are blended in a weight ratio.
Preferably, the fineness of the chemical fiber filaments is 700-1000D.
Preferably, the metal fibers in the metal hybrid yarn are ferromagnetic alloy fibers (e.g., stainless steel metal fibers or nickel alloy fibers, etc.). Preferably, the chemical fiber filament is one or more of polyester filament, nylon filament, polypropylene filament and acrylic filament. Preferably, the flame-retardant fiber is one or more of aramid fiber, modacrylic, phenolic fiber, Polybenzimidazole (PBI) fiber, PBO fiber, Polysulfonamide (PSA), and the like.
Preferably, in S11, the metal fiber strip and the flame retardant fiber strip used in the strip mixing process may be prepared as follows: (1) the flame-retardant fiber strips are prepared by opening and carding through a carding machine. 2) The metal fiber strip can be produced by drawing and stretch-cutting a plurality of metal wire bundles.
According to the preferred embodiment of the present invention, in S14, the linear density of the metal blended yarn is 60tex to 150 tex.
According to a preferred embodiment of the present invention, in S11, the length of the metal fiber is 38mm to 80mm, and the length of the flame retardant fiber is 38mm to 51 mm.
According to the preferred embodiment of the present invention, in S1, the weaving method of the base fabric is:
step 1: warping:
winding the metal blended yarn and the chemical fiber filament on a weaving shaft according to the strip arrangement of 30-50 mm, wherein the winding tension of the chemical fiber filament is 1.8-2.5g greater than that of the metal blended yarn;
step 2, reeding:
threading the chemical fiber filament on the rear harness wire, and threading the metal blended yarn on the front harness wire;
during reeding, the density can be adjusted according to the yarn count, for example, each heddle penetrates one yarn, and each dent penetrates 2 yarns; other modifications are possible;
and step 3: weaving:
during weaving, the density of weft yarns is controlled to be 98-200 yarns/10 cm, and the gram weight of the fabric is controlled to be 180-260 g/m2The metal blended yarn and the chemical fiber filament are arranged according to the rule of 30 mm-50 mm/4-10mm to be used as weft yarn to be interwoven with warp yarn, and the metal blended yarn and the chemical fiber filament are arranged on the same clothThe noodles adopt different weaving methods; specifically, the weaving method of the metal blended yarn is plain weave or twill weave with one upper part and two lower parts (1/2 twill weave), the weaving method of the chemical fiber long fiber is 2/2 or 2/4, and the ratio of the two floating lines is 1/2-1/3.
Wherein, the strip-shaped arrangement of 30 mm-50 mm is mainly determined according to the warp density, the grid size and reed number of the grid-shaped base cloth and is mainly used for controlling the size of the grid on the base cloth.
The base fabric manufactured by adopting the metal blended yarn and the chemical fiber filament yarn and the weaving method with the characteristics has a compact structure of the metal blended yarn part and a loose structure of the chemical fiber filament yarn part, and in the subsequent treatment (flame-retardant gum, functional coating and high-temperature shaping) process of the fabric, because the shrinkage rate of the metal blended yarn is very low, the shrinkage rate of the chemical fiber filament yarn is much larger, the deformation rates of the two materials are different, the part of the metal blended yarn is arched to form a sand hill-shaped protrusion, and the part of the chemical fiber filament yarn is shrunk to form a gully shape, and the protrusions and the gully surface structures form the multi-dimensional absorption and scattering effects on electromagnetic waves, reduce the reflectivity of the electromagnetic waves and play a role in hiding visible light, radar waves and infrared light.
On the other hand, the embodiment of the invention provides a camouflage stealth barrier material which is prepared by adopting the method of any one of the embodiments.
Wherein, in the base cloth, the content of the flame-retardant fiber is 85-95%, the content of the metal fiber filament is 0.2-9.5%, and the content of the chemical fiber filament is 4.5-6%.
(III) advantageous effects
The invention has the beneficial effects that:
the invention discloses a preparation method of a camouflage hidden barrier material, which is mainly characterized in that chemical fiber filaments and metal blended yarns are arranged according to a certain rule to be woven into latticed base cloth through different shrinkage rates of different materials in the weaving process, different weaving methods are adopted on the same cloth surface, the weaving structure of the chemical fiber filaments is loose, the weaving structure of the metal blended yarns is compact, after subsequent flame-retardant gum application, functional coating and high-temperature setting (120 plus 140 ℃), the base cloth naturally generates deformation shrinkage and arching, sandy-shaped protrusions appear on the metal blended yarns, and the protrusions and the surfaces of gullies shrink into gullies, so that the surfaces of the protrusions and the gullies form multi-dimensional absorption and scattering effects on electromagnetic waves, and the reflectivity of the electromagnetic waves is reduced.
Therefore, the solution of the invention has at least the following advantages:
(1) the hot-pressing die does not need to be manufactured in advance, so that the cost can be saved; (2) the method is suitable for manufacturing large pieces of wave-absorbing stealth materials, reduces working procedures and shortens the process period; (3) after the base cloth is woven and before the base cloth is subjected to heat setting, one or more of wave-absorbing/flame-retardant/anticorrosive coatings can be coated, and the base cloth is flat and has the advantages of simple coating, easiness in operation and difficulty in omission. (4) After the base fabric is woven, the base fabric is deformed and shrunk to form protrusions and ravines by applying some functional coatings and heating, so that the high-temperature setting process of S3 may be performed simultaneously with S2. (5) The method can be used for manufacturing the barrier material for hiding the radar, the visible light and the infrared or simultaneously has the barrier material for hiding the radar, the visible light and the infrared.
Drawings
Fig. 1 is a schematic view of the surface morphology of the base fabric prepared by the preparation method of the present invention.
Detailed Description
For a better understanding of the present invention, the following detailed description of the invention is provided for illustration.
The whole technical idea of the invention is to adopt metal fibers to manufacture base cloth, and the materials for manufacturing the base cloth comprise flame-retardant fibers, high-shrinkage chemical fiber filaments and metal fiber filaments with the characteristic of absorbing electromagnetic waves; during manufacturing, firstly, metal fibers and flame-retardant fibers are made into metal blended yarns, then the metal blended yarns and chemical fiber filaments are utilized to weave base cloth, different weaving methods are adopted on the same cloth surface aiming at different materials, so that the filament with large shrinkage rate is partially loose in structure, the metal blended yarns with small shrinkage rate are compact in structure, in the subsequent coating heating and shaping process, the base cloth is naturally deformed due to the difference of material properties and different material weaving methods, during heat treatment, the metal blended yarns with compact structure and small shrinkage rate are partially protruded in a sand hill shape, the metal blended yarns with loose structure and large shrinkage rate are contracted into a gully shape, and the protruded and gully structures distributed on the surface of the base cloth form multi-dimensional absorption and scattering of electromagnetic waves, and the reflectivity of the electromagnetic waves is reduced. Wherein, before the subsequent heat setting, the surface of the base fabric can be coated with a wave-absorbing coating, an infrared camouflage shielding material coating, an anticorrosive coating or a flame-retardant coating. When an anti-corrosive coating or a flame retardant coating is applied, a clear coating is preferred.
The scheme of the invention can be summarized into the following three steps:
s1, weaving chemical fiber filaments with high heat shrinkage and metal blended yarns with low shrinkage into a latticed base cloth (shown in figure 1), wherein the middle part of the lattice on the base cloth is the metal blended yarns, and the four sides of the lattice are the chemical fiber filaments with high heat shrinkage; the shrinkage rate of the chemical fiber filament is more than 4 times of that of the metal blended yarn; the length of the chemical fiber filament floats on the four sides of each lattice is 2-3 times of the length of the metal blended yarn floats on the lattices; the metal blended yarn is prepared by mixing flame-retardant fibers and metal fibers;
s2, after the base cloth is obtained through spinning, brushing a functional coating on the surface of the base cloth;
and S3, shaping at high temperature, wherein the base cloth shrinks at different degrees at various parts at high temperature to form the sand hill-shaped protrusions and ravines on the surface.
The metal blended yarn and the chemical fiber filament are woven on the same cloth surface by adopting different weaving methods; in the lattices, the weaving method of the metal blended yarn is plain weave or 1/2 twill weave; the weaving method of the chemical fiber filaments is 2/2 or 2/4.
According to the technical scheme, the specific implementation process can be carried out according to the following steps:
(1) spinning yarn
Mixing the flame-retardant fibers and the metal fibers according to a weight ratio of 90-99.5: 10-0.5 by adopting a strip mixing process to prepare mixed fiber strips, and uniformly blending the fibers by 3-5 drawing processes to obtain the fiber strips with the grammage of 2.6-3.6 g. Wherein, the length of the main body of the metal fiber is 38 mm-80 mm, and the length of the main body of the flame-retardant fiber is controlled to be 38 mm-51 mm. Therefore, the hairiness of the metal fiber can be increased to protrude on the surface of the yarn, and the absorption and the scattering of electromagnetic waves are facilitated.
And then, entering a roving process with the draft multiple of 5-7.5 times, twisting the roving strips, wherein the twist degree is 20-30 twists/m to ensure the strength of the roving strips, and then entering a spinning process to further draft and twist the roving strips, wherein the draft multiple is 28-30 times to ensure the evenness of the yarn strips and meet the requirement of weaving on the strength. The gram weight of the prepared metal blended yarn is 2.0-3.69 g/100 m (ferromagnetic alloy fiber), and the linear density is about 60 tex-150 tex.
(2) Weaving base cloth
During warping, metal blended yarns with the linear density of 60 tex-150 tex and chemical fiber filaments of 700-1000D are arranged in a strip shape of 30 mm-50 mm and wound on a beam of loom. And the winding tension of the chemical fiber filament is about 2g greater than that of the blended yarn.
During reeding, in order to ensure that the opening is clear when the chemical fiber filament part is woven, the chemical fiber filament is threaded through the harness wire at the rear part, and the metal blended yarn is threaded through the harness wire at the front part due to small elasticity.
During weaving, the density of weft yarns is controlled between 98 and 200 yarns/10 cm, and the gram weight of the fabric is 180 to 260g/m2. Arranging metal blended yarns with the linear density of 60 tex-150 tex and chemical fiber filaments with the fineness of 700-1000D according to the rule of 30 mm-50 mm/4-10mm, and weaving the metal blended yarns and the chemical fiber filaments in the same cloth cover by adopting different weaving methods; specifically, the weaving method of the metal blended yarn is plain weave or 1/2 twill weave, the weaving method of the chemical fiber filament yarn is 2/2 or 2/4, and the ratio of the two floating yarns is 1/2-1/3. Wherein the shrinkage rate of the chemical fiber filament is more than 4 times of the yield of the metal blended yarn.
Finally, the woven base fabric has a tight structure of the metal blended yarn part and a loose structure of the chemical fiber filament part.
(3) Coating layer
And spraying a functional coating on the surface of the base cloth.
The functional coating can be one or the superposition of a plurality of wave-absorbing coatings, anticorrosion coatings and flame-retardant coatings. For example, a wave-absorbing coating (e.g., ferrite wave-absorbing coating) may be sprayed first, and then a flame-retardant coating (e.g., phenolic resin coating) may be sprayed on the surface of the wave-absorbing coating.
(4) Thermal treatment
The surface of the base fabric is treated at 120-140 ℃ for 20-60s, at the moment, the surface of the base fabric is seriously deformed, the metal blended yarn part has a sand hill-shaped protrusion, the chemical fiber filament part is contracted into a gully shape, and the structures of the protrusion and the gully have multi-dimensional absorption and scattering effects on electromagnetic waves, so that the reflectivity of the electromagnetic waves is reduced, and the invisible effect on visible light, radar waves and infrared light is achieved.
In order to better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.
Example 1
The embodiment provides a camouflage stealth barrier material which is prepared by the following method:
(1) spinning yarn
The flame-retardant fiber adopts 48 mm-51 mm para-aramid fiber, and the metal fiber is ferromagnetic alloy fiber (phi 0.4 mm). The two are mixed according to the weight ratio of 9:1 by adopting a strip mixing process to prepare mixed fiber strips, and the fibers are uniformly blended by 4 drawing processes to obtain the fiber strips with the weight of 2.7g in gram. And then entering a roving process with the draft multiple of 6 times to continuously draft and twist the fiber strips, wherein the twist is 25 twists/m to ensure the strength of the roving strips, and then entering a spinning process to further draft and twist the roving strips, wherein the draft multiple is 30 times to ensure the evenness of the yarn strips and meet the requirements of weaving on the strength. The prepared metal blended yarn has the gram weight of 3.52g/100 meters and the linear density of about 110 tex.
(2) Weaving base cloth
During warping, the metal blended yarn and 800D polyester filament yarn are arranged according to a 40mm strip shape and wound on a beam. And the winding tension of the chemical fiber filament is 2g greater than that of the blended yarn. The shrinkage rate of the polyester filament yarn is 4.5 times of that of the metal blended yarn.
During reeding, in order to ensure that the opening is clear when the chemical fiber filament part is woven, the chemical fiber filament is threaded through the harness wire at the rear part, and the metal blended yarn is threaded through the harness wire at the front part due to small elasticity. Each heddle is penetrated by one yarn, and each dent is penetrated by 2 yarns.
When weaving, arranging the metal blended yarns and 800D polyester filament yarns according to the rule of 34mm/6mm as weft yarns to be interwoven with the warp yarns, controlling the density of the weft yarns to be 120/10 cm, and controlling the gram weight of the fabric to be about 242g/m2. The metal blended yarn and the chemical fiber filament adopt different weaving methods on the same cloth surface; specifically, the weaving method of the metal blended yarn is plain weaving, the weaving method of the chemical fiber filament yarn is 2/2, and the ratio of the floating yarn to the floating yarn is 1/3.
Finally, the content of the flame-retardant fibers in the base fabric is 85.8%, the content of the metal fiber filaments is 8.9%, and the content of the chemical fiber filaments is 5.3%.
(3) Coating layer
And (3) spraying a transparent polyurethane coating for 2 times on the front surface of the base fabric after the back surface of the base fabric is coated with the waterproof back adhesive for 2 times.
(4) Thermal treatment
Treating the coated fabric at 140 ℃ for 35s, shaping the coated fabric, enabling the metal blended yarn part to have a sand hill-shaped protrusion and the chemical fiber filament part to shrink into a gully shape, forming the absorption and scattering effects on multiple frequency bands of electromagnetic waves, reducing the reflectivity of the electromagnetic waves, and playing the stealth effect on visible light, radar waves and infrared light.
Tests show that the stealth material prepared in the embodiment 1 has the electromagnetic wave attenuation value of 12.6-14.5dB in the frequency ranges of 2 GHz-18 GHz and 26.5 GHz-40 GHz.
Example 2
The embodiment provides a camouflage stealth barrier material which is prepared by the following method:
(1) spinning yarn
The flame-retardant fibers are 48-51 mm flame-retardant aramid fibers, and the metal fibers are stainless steel (phi 0.4 mm). The two are mixed according to the weight ratio of 9.5:0.5 by adopting a strip mixing process to prepare mixed fiber strips, and the fibers are uniformly blended by 5 drawing processes to obtain the fiber strips with the weight of 3.2g in gram. And then entering a roving process with the draft multiple of 6 times to continuously draft and twist the fiber strips, wherein the twist is 25 twists/m to ensure the strength of the roving strips, and then entering a spinning process to further draft and twist the roving strips, wherein the draft multiple is 30 times to ensure the evenness of the yarn strips and meet the requirements of weaving on the strength. The prepared metal blended yarn has the gram weight of 3.62g/100 meters and the linear density of about 120 tex.
(2) Weaving base cloth
During warping, the metal blended yarn and the 800D nylon filament are arranged according to a 40mm belt shape and wound on a beam of knitting. And the winding tension of the chemical fiber filament is 2g greater than that of the blended yarn. The shrinkage rate of the polyester filament yarn is 4.2 times of that of the metal blended yarn.
During reeding, in order to ensure that the opening is clear when the chemical fiber filament part is woven, the chemical fiber filament is threaded through the harness wire at the rear part, and the metal blended yarn is threaded through the harness wire at the front part due to small elasticity. Each heddle is penetrated by one yarn, and each dent is penetrated by 2 yarns.
During weaving, the metal blended yarns and 800D nylon filaments are arranged according to a 34mm/6mm rule to be used as weft yarns to be interwoven with warp yarns, the density of the weft yarns is controlled to be between 150 pieces/10 cm, and the gram weight of the fabric is controlled to be about 251g/m2. The metal blended yarn and the chemical fiber filament adopt different weaving methods on the same cloth surface; specifically, the weaving method of the metal blended yarn is 1/2 twill, and the weaving method of the chemical fiber filament is 2/4, so that the ratio of the two floats is about 1/3.
Finally, the content of the flame-retardant fibers in the base fabric is 85.9%, the content of the metal fiber filaments is 9.5%, and the content of the chemical fiber filaments is 4.6%.
(3) Coating layer
The surface of the base cloth is firstly made with flame-retardant water-repellent, the waterproof back glue is made for 2 times, and finally the waterproof coating is made.
(4) Thermal treatment
Treating the coated fabric at 140 ℃ for 30s, shaping the coated fabric, enabling the metal blended yarn part to have a sand hill-shaped protrusion, and enabling the chemical fiber filament part to shrink into a gully shape, so as to form multi-dimensional absorption and scattering effects on electromagnetic waves, reduce the reflectivity of the electromagnetic waves, and play a role in hiding visible light, radar waves and infrared light.
Tests show that the stealth material prepared in the embodiment 2 has an electromagnetic wave attenuation value of 14.8-18.7dB in the frequency ranges of 2 GHz-18 GHz and 26.5 GHz-40 GHz.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A preparation method of a camouflage stealth barrier material is characterized by comprising the following steps:
s1, weaving chemical fiber filaments with high heat shrinkage and metal blended yarns with low shrinkage into latticed base cloth, wherein the middle part of the latticed base cloth is the metal blended yarns, and the four sides of the latticed base cloth are the chemical fiber filaments with high heat shrinkage; the shrinkage rate of the chemical fiber filament is more than 4 times of that of the metal blended yarn; the metal blended yarn is prepared by blending flame-retardant fibers and metal fibers;
s2, brushing a functional coating on the surface of the base cloth;
and S3, high-temperature shaping, wherein the base cloth is shaped at the high temperature of 120-140 ℃, each part shrinks to different degrees, and the surface forms sandy-hill-shaped protrusions and ravines.
2. The method for preparing the fabric according to claim 1, wherein in S1, the metal blended yarn and the chemical fiber filament are woven on the same fabric surface by different weaving methods; in the middle part of the lattice, the weaving method of the metal blended yarn is plain weave or twill weave with one upper part and two lower parts; the four sides of the lattices, the weaving method of the chemical fiber filaments is two-up two-down or two-up four-down; the length of the chemical fiber filament floats on the four sides of each lattice is 2-3 times of the length of the metal blended yarn floats on the lattices.
3. The preparation method according to claim 1, wherein in S2, the coating is one or more of a coating of a wave-absorbing material, a coating of an infrared camouflage shielding material, a coating of an anticorrosive material and a coating of a flame retardant material.
4. The method of claim 1, wherein in S1, the metal blended yarn is prepared as follows:
s11, mixing the flame-retardant fibers and the metal fibers according to a ratio by adopting a strip mixing process to prepare mixed fiber strips, and uniformly blending the fibers by 3-5 drawing processes to prepare fiber strips with the gram weight of 2.6-3.6 g/m;
s12, feeding the fiber strips into a roving process with the draft multiple of 5-7.5 times to obtain roving strips, and twisting the roving strips, wherein the twist is 20-30 twists/m, so that the strength of the roving strips is ensured;
s13, feeding the roving strips into a spinning process for further drafting and twisting to ensure that the yarn is even, wherein the drafting multiple is 28-30 times to obtain spun yarns with the gram weight of 2.0-3.69 g/100 m;
and S14, doubling and twisting 2-4 spun yarns to ensure that the metal fibers are in multi-spiral cohesion with the flame-retardant fibers and increase the curved surface and hairiness of the metal fibers to obtain the metal blended yarn.
5. The preparation method of claim 4, wherein in S11, the flame retardant fibers and the metal fibers are blended in a weight ratio of 90-99.5% by mass and 10-0.5% by mass.
6. The method of claim 4, wherein in S14, the linear density of the metal blended yarn is 60tex to 150 tex.
7. The method according to claim 4, wherein in S11, the metal fiber length is 38mm to 80mm, and the flame-retardant fiber length is 38mm to 51 mm.
8. The method according to claim 1, wherein in S1, the weaving method of the base fabric is:
step 1: warping:
winding the metal blended yarn and the chemical fiber filament on a weaving shaft according to the strip arrangement of 30-50 mm, wherein the winding tension of the chemical fiber filament is 1.8-2.5g greater than that of the metal blended yarn;
step 2, reeding:
threading the chemical fiber filament on the rear harness wire, and threading the metal blended yarn on the front harness wire;
and step 3: weaving:
during weaving, the density of weft yarns is controlled to be 98-200 yarns/10 cm, and the gram weight of the fabric is controlled to be 180-260 g/m2Arranging the metal blended yarns and the chemical fiber filaments according to the rule of 30-50 mm/4-10mm to be used as weft yarns and warp yarns for interweaving, wherein the metal blended yarns and the chemical fiber filaments adopt different weaving methods on the same cloth surface; specifically, the weaving method of the metal blended yarn is plain weave or 1/2 twill weave, the weaving method of the chemical fiber long fibers is 2/2 or 2/4, and the floating long yarns of the weaving part of the metal blended yarn are 1/2-1/3 of the floating long yarns of the weaving part of the chemical fiber long fibers.
9. A camouflage stealth barrier material prepared by the preparation method of any one of claims 1 to 8.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3199547A (en) * | 1962-03-05 | 1965-08-10 | Moelnlycke Ab | Camouflage net |
| CN106585026A (en) * | 2016-12-02 | 2017-04-26 | 刘泽含 | Highly protective polyimide flame-retardant garment fabric and heat setting method thereof |
| CN106702794A (en) * | 2015-07-17 | 2017-05-24 | 顾方钟 | Comfortable checked fabric with flame-retardant fabric layer |
| CN107130338A (en) * | 2017-06-26 | 2017-09-05 | 肃宁县中原纺织有限责任公司 | One kind camouflage concavo-convex checked fabric and its production method |
| CN109743900B (en) * | 2017-08-14 | 2018-09-28 | 河北科技大学 | A kind of camouflage suction wave blanket |
| CN109259355A (en) * | 2018-10-31 | 2019-01-25 | 保定三源纺织科技有限公司 | A kind of livewire work screening clothing, screening clothing fabric and its production technology |
-
2021
- 2021-05-10 CN CN202110506930.4A patent/CN113201842B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3199547A (en) * | 1962-03-05 | 1965-08-10 | Moelnlycke Ab | Camouflage net |
| CN106702794A (en) * | 2015-07-17 | 2017-05-24 | 顾方钟 | Comfortable checked fabric with flame-retardant fabric layer |
| CN106585026A (en) * | 2016-12-02 | 2017-04-26 | 刘泽含 | Highly protective polyimide flame-retardant garment fabric and heat setting method thereof |
| CN107130338A (en) * | 2017-06-26 | 2017-09-05 | 肃宁县中原纺织有限责任公司 | One kind camouflage concavo-convex checked fabric and its production method |
| CN109743900B (en) * | 2017-08-14 | 2018-09-28 | 河北科技大学 | A kind of camouflage suction wave blanket |
| CN109259355A (en) * | 2018-10-31 | 2019-01-25 | 保定三源纺织科技有限公司 | A kind of livewire work screening clothing, screening clothing fabric and its production technology |
Non-Patent Citations (1)
| Title |
|---|
| 王革辉: "《服装面料的性能与选择》", 31 May 2013, 上海：东华大学出版社 * |
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