CN112743920A - Novel electromagnetic protective clothing cloth - Google Patents

Novel electromagnetic protective clothing cloth Download PDF

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Publication number
CN112743920A
CN112743920A CN201911045493.XA CN201911045493A CN112743920A CN 112743920 A CN112743920 A CN 112743920A CN 201911045493 A CN201911045493 A CN 201911045493A CN 112743920 A CN112743920 A CN 112743920A
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China
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layer
wave
conductive
periodic structure
structure layer
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CN201911045493.XA
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Chinese (zh)
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CN112743920B (en
Inventor
陶益杰
张朝阳
周建伟
穆武第
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Shanghai Rong Special Equipment Co ltd
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Shanghai Rong Special Equipment Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear
    • A41D31/02—Layered materials
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear
    • A41D31/04—Materials specially adapted for outerwear characterised by special function or use
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/02—Layer formed of wires, e.g. mesh
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/14—Layered products comprising a layer of metal next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/06—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer characterised by a fibrous or filamentary layer mechanically connected, e.g. by needling to another layer, e.g. of fibres, of paper
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    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/08—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer the fibres or filaments of a layer being of different substances, e.g. conjugate fibres, mixture of different fibres
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    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/73—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof
    • D06M11/74—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with carbon or compounds thereof with carbon or graphite; with carbides; with graphitic acids or their salts
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
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    • D06M15/55—Epoxy resins
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/643—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing silicon in the main chain
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/693—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural or synthetic rubber, or derivatives thereof
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
    • D06P1/52—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing synthetic macromolecular substances
    • D06P1/5207—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • D06P1/5214—Polymers of unsaturated compounds containing no COOH groups or functional derivatives thereof
    • D06P1/5221—Polymers of unsaturated hydrocarbons, e.g. polystyrene polyalkylene
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
    • D06P1/52—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing synthetic macromolecular substances
    • D06P1/5264—Macromolecular compounds obtained otherwise than by reactions involving only unsaturated carbon-to-carbon bonds
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
    • D06P1/52—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing synthetic macromolecular substances
    • D06P1/5264—Macromolecular compounds obtained otherwise than by reactions involving only unsaturated carbon-to-carbon bonds
    • D06P1/5292—Macromolecular compounds obtained otherwise than by reactions involving only unsaturated carbon-to-carbon bonds containing Si-atoms
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
    • D06P1/673—Inorganic compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

The invention discloses a novel electromagnetic protective clothing fabric, which comprises the following components from top to bottom: the structure comprises a conductive cloth layer, a wave-transparent periodic structure layer, a plurality of overlapped structure layers and a lining; the multilayer overlapped structure layer comprises a plurality of resistance type loss wave-absorbing material layers and a plurality of resonance attenuation period structure layers, and the resistance type loss wave-absorbing material layers and the resonance attenuation period structure layers are alternately laminated; the side of the multilayer overlapping structure layer close to the wave-transparent periodic structure layer is a resistance-type loss wave-absorbing material layer, and the side close to the inner liner is a resonance attenuation periodic structure layer; the conductive pattern of the wave-transparent periodic structure layer is Y-shaped; and the positions of the resonance attenuation periodic structure layer corresponding to the conductive patterns of the wave-transparent periodic structure layer are not printed with conductive coatings, and other positions are printed with conductive coatings. The electromagnetic shielding effectiveness of the cloth provided by the invention on 1-18 GHz electromagnetic waves reaches more than 50dB, the shielding effect on 1-18 GHz electromagnetic waves is good, and the cloth can effectively absorb and isolate the harm of the electromagnetic waves on human bodies when being applied to protective clothing for pregnant women.

Description

Novel electromagnetic protective clothing cloth
Technical Field
The invention relates to the technical field of biological electromagnetic protection, in particular to novel electromagnetic protective clothing fabric.
Background
With the rapid development of science and technology, the wide application of various electric appliances and automation equipment leads to increasingly serious electromagnetic radiation pollution, and attracts attention to the electromagnetic protection of key people such as pregnant women, and the development of high-performance practical electromagnetic protection clothes is urgent.
Currently, maternity protective clothing cloth mainly takes three forms: 1. the method is realized by adopting stainless steel fiber spinning; 2. the method is realized by adopting a common base cloth to plate a metal coating; 3. the former two ways are combined. The three forms mainly utilize the good conductivity of cloth to carry out reflection isolation on electromagnetic waves, but not to carry out loss attenuation. The related cloth is not only poor in comfort, but also poor in protection effect against electromagnetic wave pollution materials. On one hand, after the electromagnetic wave enters from the gap between the clothes and the human body, the electromagnetic wave cannot be reflected out due to the isolation effect of the conductive cloth, and can be completely absorbed by the human body after being reflected for many times between the human body and the protective clothing, so that the human body is possibly damaged more, and the original effect of the protective clothing is lost. In addition, the protection efficiency of the conductive cloth is poor for the high-frequency electromagnetic wave in the current environment.
Disclosure of Invention
The invention provides a novel electromagnetic protective clothing fabric, which is used for overcoming the defects of the prior art, realizing good absorption attenuation and reflection isolation of electromagnetic waves in a wide frequency band, and has good comfortableness.
In order to achieve the purpose, the invention provides a novel electromagnetic protective clothing fabric, which comprises the following components from top to bottom: the structure comprises a conductive cloth layer, a wave-transparent periodic structure layer, a plurality of overlapped structure layers and a lining;
the multilayer overlapped structure layer comprises a plurality of resistance type loss wave-absorbing material layers and a plurality of resonance attenuation period structure layers, and the resistance type loss wave-absorbing material layers and the resonance attenuation period structure layers are alternately laminated; the side of the multilayer overlapping structure layer close to the wave-transparent periodic structure layer is a resistance-type loss wave-absorbing material layer, and the side close to the inner liner is a resonance attenuation periodic structure layer; the square resistance of the conductive paint film is gradually reduced from top to bottom by the plurality of resonance attenuation period structural layers;
the conductive pattern of the wave-transparent periodic structure layer is Y-shaped; and the positions of the resonance attenuation periodic structure layer corresponding to the conductive patterns of the wave-transparent periodic structure layer are not printed with conductive coatings, and other positions are printed with conductive coatings.
Compared with the prior art, the invention has the beneficial effects that:
the novel electromagnetic protective clothing cloth provided by the invention integrates three mechanisms of electromagnetic wave reflection, resonance loss and electric loss wave absorption, firstly, the electromagnetic waves penetrating through the conductive cloth layer are reflected and shielded by the conductive cloth layer on the surface layer to completely enter the multilayer overlapped structure layer under the action of the wave-transparent periodic structure layer through low-frequency electromagnetic waves (below 1 GHz) incident from the front surface and obliquely incident, so that the electromagnetic waves are prevented from penetrating through the electromagnetic protective clothing cloth to be contacted with a human body; the electromagnetic waves in the multilayer overlapped structure layer firstly pass through the resistance type loss wave-absorbing material layer, the resistance type loss wave-absorbing material layer can absorb part of the electromagnetic waves through electrical loss, and the absorption loss rate of the electromagnetic waves is high especially for the electromagnetic waves of 4-18 GHz; the unabsorbed electromagnetic waves enter the resonance attenuation period structural layer, and the resonance attenuation period structural layer has a good resonance loss effect on the electromagnetic waves of 1-4 GHz; the wave-transparent periodic structure layer and the resonance attenuation periodic structure layer need to be separated by a certain thickness, so that the wave-transparent periodic structure layer and the resonance attenuation periodic structure layer are separated by adopting a resistance type loss wave-absorbing material layer, and the resonance attenuation periodic structure layer cannot generate an effect due to the overlapping of the wave-transparent periodic structure layer and the resonance attenuation periodic structure layer; through the matching effect of the resistance type loss wave-absorbing material layer and the resonant attenuation period structural layer, the electromagnetic protective clothing fabric provided by the invention has good absorption loss performance on 1-18 GHz band omnibearing electromagnetic waves, and the electromagnetic shielding efficiency on 1-18 GHz electromagnetic waves reaches more than 50 dB; a plurality of resistance type loss wave-absorbing material layers and resonance attenuation period structure layers are arranged in the plurality of overlapped structure layers, so that better absorption loss of electromagnetic waves is realized, and the electromagnetic waves are prevented from contacting with a human body through cloth; the square resistance of the conductive paint film from top to bottom of the plurality of resonance attenuation period structural layers is gradually reduced, so that the electromagnetic wave is gradually subjected to resonance loss on one hand, and the electromagnetic wave can gradually penetrate into the next layer to be absorbed on the other hand, and the finally prepared cloth has the best reflection-absorption effect. In addition, the conductive pattern of the wave-transparent periodic structure layer is designed into a Y shape, the positions of the resonance attenuation periodic structure layer corresponding to the conductive pattern of the wave-transparent periodic structure layer are not printed with conductive coatings, and other positions are printed with conductive coatings, so that the absorption loss rate of the electromagnetic protective clothing fabric to electromagnetic waves can be increased; meanwhile, the comfort of the cloth is improved due to the design of the lining; in conclusion, the electromagnetic protective clothing fabric provided by the invention can be used for preparing electromagnetic protective clothing and can be applied to protective clothing for pregnant women, so that the harm of electromagnetic waves to human bodies can be effectively absorbed and isolated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a novel electromagnetic protective clothing fabric provided in example 1;
fig. 2 is a schematic view of a wave-transparent periodic structure layer provided in embodiment 1;
fig. 3 is a schematic diagram of a resonance damping periodic structure layer provided in embodiment 1;
FIG. 4 is an attenuation curve diagram of the reflectivity of electromagnetic waves of the resistive loss wave-absorbing material layer provided in example 1 at a frequency band of 1-18 GHz;
FIG. 5 is a graph showing the attenuation curve of the reflectivity of electromagnetic waves in the frequency range of 1-18 GHz by the wave-transparent periodic structure layer and the multiple overlapping structure layers in the novel electromagnetic protective clothing fabric provided in example 1;
FIG. 6 is a graph showing electromagnetic shielding effectiveness of the novel electromagnetic protective clothing fabric provided in example 1 in the frequency range of 1 to 18 GHz;
FIG. 7 is an electromagnetic wave reflectivity attenuation curve of the resistive loss wave-absorbing material layer provided in example 2 at a frequency band of 1-18 GHz;
fig. 8 is a graph of the attenuation curve of the electromagnetic wave reflectivity of the wave-transparent periodic structure layer and the multiple overlapping structure layers in the novel electromagnetic protective clothing fabric provided in embodiment 2 in the frequency band of 1 to 18 GHz;
FIG. 9 is a graph showing electromagnetic shielding effectiveness of the novel electromagnetic protective clothing fabric provided in example 2 in the frequency range of 1 to 18 GHz;
FIG. 10 is an electromagnetic wave reflectivity attenuation curve diagram of the resistive loss wave-absorbing material layer provided in example 3 at a frequency band of 1-18 GHz;
fig. 11 is a graph of the attenuation curve of the electromagnetic wave reflectivity of the wave-transparent periodic structure layer and the multiple overlapping structure layers in the novel electromagnetic protective clothing fabric provided in embodiment 3 in the frequency band of 1 to 18 GHz;
fig. 12 is a graph illustrating electromagnetic shielding effectiveness of the novel electromagnetic protective clothing fabric provided in embodiment 3 in the frequency band of 1 to 18 GHz.
The reference numbers illustrate: 1: a conductive cloth layer; 2: a wave-transparent periodic structure layer; 3: a resistive loss wave-absorbing material layer; 4: a resonance damping periodic structure layer; 5: and (4) lining.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious 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.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The drugs/reagents used are all commercially available without specific mention.
The invention provides a novel electromagnetic protective clothing fabric, which comprises the following components from top to bottom: the structure comprises a conductive cloth layer, a wave-transparent periodic structure layer, a plurality of overlapped structure layers and a lining;
the multilayer overlapped structure layer comprises a plurality of resistance type loss wave-absorbing material layers and a plurality of resonance attenuation period structure layers, and the resistance type loss wave-absorbing material layers and the resonance attenuation period structure layers are alternately laminated; the side of the multilayer overlapping structure layer close to the wave-transparent periodic structure layer is a resistance-type loss wave-absorbing material layer, and the side close to the inner liner is a resonance attenuation periodic structure layer; the square resistance of the conductive paint film is gradually reduced from top to bottom by the plurality of resonance attenuation period structural layers;
the conductive pattern of the wave-transparent periodic structure layer is Y-shaped; and the positions of the resonance attenuation periodic structure layer corresponding to the conductive patterns of the wave-transparent periodic structure layer are not printed with conductive coatings, and other positions are printed with conductive coatings.
And multiple layers of overlapping layers are alternately overlapped, namely a resistance type loss wave-absorbing material layer, a resonance attenuation period structural layer, a resistance type loss wave-absorbing material layer, a resonance attenuation period structural layer and the like.
Preferably, the lining is made of common clothing fabric with good comfort, so that the comfort of the electromagnetic protective clothing fabric is improved.
Preferably, the conductive cloth layer is formed by electroplating nickel-copper alloy on the surface of the metal fiber blended base cloth, and the thickness of the nickel-copper alloy electroplated on the surface is nano-scale, so that the plating layer is prevented from falling off easily due to the thicker plating layer; the surface sheet resistance of the conductive cloth layer is 0.01-0.1 omega/□. The surface layer conductive cloth is used for shielding electromagnetic waves incident from the front and partially incident obliquely and reducing the energy of the electromagnetic waves directly contacting with a human body; in addition, the metal fiber blended fabric is used as the base fabric, so that the flexibility of the fabric is improved.
Preferably, the wave-transparent periodic structure layer or the resonance attenuation periodic structure layer is realized by printing a conductive paste pattern on a base cloth, and the specific steps are as follows:
s11: grinding a mixture of nano ITO (indium tin oxide) powder, a dispersing agent, resin and a solvent in a grinding machine and a nano grinding machine in sequence, carrying out classified filtration and centrifugal precipitation to obtain ITO raw stock, and regulating and controlling the ITO raw stock into slurry with the viscosity of 3000-4000 mPas; the viscosity of the paste is controlled to allow printing, and too high and too low a viscosity causes uneven printing and non-patterned printing.
S12: coating a resin priming layer on the surface of the light chemical fiber cloth in a scraping mode, and printing a Y-shaped conductive pattern on the resin priming layer of the light chemical fiber cloth by using the slurry obtained in the step S11 through a screen printing method to obtain a wave-transparent periodic structure layer;
and (3) coating a resin priming layer on the surface of the light chemical fiber cloth in a scraping mode, avoiding the position of the light chemical fiber cloth, which corresponds to the Y-shaped conductive pattern of the wave-transparent periodic structure layer, and printing a conductive coating on other positions on the resin priming layer of the light chemical fiber cloth by using the slurry obtained in the step S11 through a screen printing method to obtain the resonance attenuation periodic structure layer.
The light chemical fiber cloth is used as the base cloth, so that the manufactured electromagnetic protective clothing cloth is softer, and the comfort is improved. The size of the Y-shaped conductive pattern is specifically designed according to the size of the wavelength, so that the wave absorbing efficiency of the obtained electromagnetic protective clothing cloth is enhanced. The wave-transparent periodic structure layer and the resonance attenuation periodic structure layer are designed in a matching way so as to enhance the wave-absorbing performance of the electromagnetic protective clothing cloth.
Preferably, the nano ITO powder is 50-150 g, the dispersing agent is 5-10 g, the resin is 80-200 g, and the solvent is 400-700 g; the paste prepared by the formula can ensure the pattern uniformity and the conductivity of the paste for screen printing;
the average grain diameter of ITO powder in the ITO raw stock is 0.5-3 mu m, and the conductivity and viscosity of the stock can be ensured by controlling the grain diameter of the ITO powder.
Preferably, the resin is one of epoxy resin, polyurethane, organic silicon resin, ethylene propylene rubber and styrene butadiene rubber; the resin is used as a binder, the viscosity and the film-forming property of the slurry are adjusted, and the proper resin is selected to ensure the proper viscosity and the excellent film-forming property of the slurry.
Preferably, the square resistance of the conductive paint film of the wave-transparent periodic structure layer is 400-600 omega/□, and the square resistance is greatly beneficial to the transmission of electromagnetic waves; the conductive paint film square resistance of the resonance attenuation period structural layer is 10-300 omega/□, and the square resistance is the basis of transmission and resonance loss of electromagnetic waves.
Preferably, the resistive loss wave-absorbing material layer is realized by dipping, and the specific steps are as follows:
s21: mixing and stirring conductive graphite, resin, a solvent, a dispersing agent, a flatting agent, a bactericide, an anti-aging agent and an anti-ultraviolet agent according to the weight ratio to obtain conductive graphite slurry; the conductive graphite slurry prepared by the formula can ensure that the finally prepared electromagnetic protective clothing fabric has mildew-proof, sterilization and ultraviolet-proof properties and has good mechanical properties.
S22: soaking the light porous cloth in the conductive graphite slurry obtained in the step S21, spin-drying, and repeating the soaking and spin-drying processes for a plurality of times to obtain a conductive graphite slurry layer; the light porous cloth is selected, so that the flexibility and the comfort of the finally prepared electromagnetic protective clothing cloth can be improved.
S23: and according to the protection requirement, overlapping a plurality of layers of conductive graphite slurry layers obtained from S22 to obtain the resistance type loss wave-absorbing material layer. The number of layers to be stacked can be selected according to different requirements of protection, so that different requirements are met.
Preferably, the first and second electrodes are formed of a metal,
in the S21, 40-80 g of conductive graphite, 200-300 g of resin, 600-1000 g of solvent, 10-30 g of dispersing agent, 10-30 g of flatting agent, 5-10 g of bactericide, 10-20 g of anti-aging agent and 40-60 g of anti-ultraviolet agent; the conductive graphite slurry obtained under the weight ratio can obtain the electromagnetic protective clothing fabric with better performance.
The stirring time is 2-4 h, and the speed is 3000-6000 r/min, so as to ensure that the raw materials are uniformly mixed;
in the step S22, the weight of the cloth of the conductive graphite slurry layer is increased to 40-80 g/m2(ii) a The weight gain is in direct proportion to the wave absorbing performance of the conductive graphite slurry layer, but the weight gain cannot be too much considering the comfort and the flexibility of the final cloth.
In the step S23, the resistance type loss wave-absorbing material layer comprises 2-4 conductive graphite slurry layers. On the premise of considering the comfort and the flexibility of the final cloth, the high wave-absorbing loss rate of the resistance type loss wave-absorbing material layer to electromagnetic waves is ensured.
Preferably, the electromagnetic protective clothing cloth comprises two resistance type loss wave-absorbing material layers and two resonance attenuation period structure layers; each layer of the resistance type loss wave-absorbing material layer is 2-5 mm in thickness, and the square resistance is 300-1000 omega/□; the thickness is in direct proportion to the wave-absorbing performance, but the final cloth cannot be too thick in consideration of comfort and flexibility; the square resistance of the conductive paint film of the upper resonance attenuation period structural layer is 200-300 omega/□, and the square resistance of the conductive paint film of the lower resonance attenuation period structural layer is 10-200 omega/□.
Preferably, the overall thickness of the electromagnetic protective clothing fabric is 8-15 mm, and the surface density is 0.5-0.8 kg/m2. Too thin cloth of electromagnetic protective clothing can affectThe shielding performance to electromagnetic waves is too thick, so that the comfort and the flexibility of the cloth of the electromagnetic protective clothing are influenced; the control surface density is to satisfy the electromagnetic wave protection performance and make people feel comfortable as much as possible.
Example 1
This embodiment provides a novel electromagnetic protection clothes cloth, as shown in fig. 1, cloth top-down includes: the structure comprises a conductive cloth layer 1 (the thickness is 0.5mm, the sheet resistance is 0.025 omega/□), a wave-transparent periodic structure layer 2, a plurality of overlapped structure layers and a lining 5; and superposing and sewing the conductive cloth layer 1, the wave-transparent periodic structure layer 2, the multiple overlapped structure layers and the lining 5 in sequence to obtain the novel electromagnetic protective clothing fabric.
The multilayer overlapped structural layers comprise two resistance type loss wave-absorbing material layers 3 and two resonance attenuation period structural layers 4, and the resistance type loss wave-absorbing material layers 3 and the resonance attenuation period structural layers 4 are alternately laminated; the side of the multilayer overlapping structure layer close wave-transparent periodic structure layer 2 is a resistance-type loss wave-absorbing material layer 3, and the side close to the lining 5 is a resonance attenuation periodic structure layer 4; the sheet resistance of the conductive paint film is gradually reduced from top to bottom by the two resonance attenuation period structural layers;
the conductive pattern of the wave-transparent periodic structure layer is Y-shaped (as shown in figure 2); the positions of the resonance attenuation periodic structure layer (as shown in fig. 3) corresponding to the conductive patterns of the wave-transparent periodic structure layer are not printed with conductive coatings, and the other positions are printed with conductive coatings.
The preparation process of the wave-transparent periodic structure layer or the resonance attenuation periodic structure layer comprises the following steps:
s12: grinding 80g of nano ITO powder, 10g of dispersing agent, 150g of resin (styrene butadiene rubber) and 600g of solvent (xylene) mixture in a grinding machine and a nano grinding machine in sequence (the time is 1 hour), carrying out classification filtration and centrifugal precipitation to obtain ITO raw stock with the particle size of 1.0 mu m, adding 200g of styrene butadiene rubber resin, 5g of flatting agent, 1g of film forming additive and 200g of xylene into the ITO raw stock, and regulating and controlling the mixture into slurry with the viscosity of 3400mPa s;
s12: coating a resin priming layer on the surface of the light chemical fiber cloth in a scraping mode, printing a Y-shaped conductive pattern with the square resistance of 450 omega/□ on the resin priming layer of the light chemical fiber cloth through a 100-mesh silk screen plate by using slurry obtained from S11, and obtaining a wave-transparent periodic structure layer;
and (3) coating a resin priming layer on the surface of the light chemical fiber cloth in a scraping manner, avoiding the position of the light chemical fiber cloth corresponding to the Y-shaped conductive pattern of the wave-transparent periodic structure layer, and printing a conductive coating on other positions on the resin priming layer of the light chemical fiber cloth by the slurry obtained from S11 through a 100-mesh silk screen plate to obtain the resonance attenuation periodic structure layer. In the embodiment, the sheet resistance of the conductive paint film of the upper resonance attenuation period structural layer is 200 omega/□, and the sheet resistance of the conductive paint film of the lower resonance attenuation period structural layer is 50 omega/□.
The preparation process of the resistance type loss wave-absorbing material layer comprises the following steps:
s21: mixing 60g of conductive graphite, 200g of resin (styrene butadiene rubber), 700g of solvent (xylene), 15g of dispersing agent, 10g of flatting agent, 6g of bactericide, 15g of anti-aging agent and 50g of anti-ultraviolet agent, and stirring for 3 hours at 4500r/min to obtain conductive graphite slurry;
s22: soaking the light porous cloth in the conductive graphite slurry obtained in the step S21, spin-drying, and repeating the soaking and spin-drying processes twice to obtain a conductive graphite slurry layer; the weight of the cloth is increased by 51g, and the thickness of the single-layer cloth is 0.8 mm;
s23: according to the protection requirement, overlapping a plurality of layers of conductive graphite slurry layers obtained from S22 to obtain a resistance type loss wave-absorbing material layer; in this embodiment, the upper resistive loss wave-absorbing material layer includes three conductive graphite slurry layers, and the lower resistive loss wave-absorbing material layer includes four conductive graphite slurry layers.
The total thickness of the novel electromagnetic protective clothing fabric prepared by the embodiment is 12mm, and the surface density is 0.72kg/m2。
Fig. 4 is a graph showing the attenuation curve of the electromagnetic wave reflectivity of the resistive loss wave-absorbing material layer in the frequency band of 1 to 18GHz, and it can be seen from the graph that the absorption attenuation of the resistive loss wave-absorbing material layer in the embodiment to the electromagnetic wave reflectivity of 1 to 2, 2 to 4, 4 to 8 and 8 to 18GHz is 4, 9, 12 and 20dB respectively, which shows that the resistive loss wave-absorbing material layer has a good effect on the absorption loss of the electromagnetic wave of 4 to 18GHz and a poor effect on the absorption loss of the electromagnetic wave of 1 to 4 GHz.
Fig. 5 shows that the absorption attenuation of the wave-transparent periodic structure layer and the multi-layer overlapping structure layer in the electromagnetic protective fabric used in this embodiment is respectively 8dB, 10 dB, 16 dB, and 22dB for the electromagnetic wave reflectivity of 1GHz to 2 GHz, 2 GHz to 4GHz, 4GHz to 8GHz, and it can be seen that the introduction of the periodic structure improves the absorption attenuation performance of the fabric as a whole.
Fig. 6 is a graph showing electromagnetic shielding effectiveness of the electromagnetic shielding fabric of the electromagnetic shielding suit provided in this embodiment in a frequency band of 1 to 18GHz, and it can be known that the electromagnetic shielding effectiveness of the electromagnetic shielding suit provided in this embodiment for the electromagnetic waves of 1 to 18GHz reaches more than 50 dB.
Example 2
This embodiment provides a novel electromagnetic protection clothes cloth, cloth top-down includes: a conductive cloth layer (the thickness is 0.4mm, the sheet resistance is 0.01 omega/□), a wave-transparent periodic structure layer, a multi-layer overlapped structure layer and a lining; and superposing and gluing the conductive cloth layer, the wave-transparent periodic structure layer, the multilayer overlapping structure layer and the lining in sequence to obtain the novel electromagnetic protective clothing fabric.
The multilayer overlapped structure layers comprise three resistance type loss wave-absorbing material layers and three resonance attenuation period structure layers, and the resistance type loss wave-absorbing material layers and the resonance attenuation period structure layers are alternately laminated; the side of the multilayer overlapping structure layer close to the wave-transparent periodic structure layer is a resistance-type loss wave-absorbing material layer, and the side close to the inner liner is a resonance attenuation periodic structure layer; the sheet resistance of the conductive paint film is gradually reduced from top to bottom by the two resonance attenuation period structural layers;
the conductive pattern of the wave-transparent periodic structure layer is Y-shaped; and the positions of the resonance attenuation periodic structure layer corresponding to the conductive patterns of the wave-transparent periodic structure layer are not printed with conductive coatings, and other positions are printed with conductive coatings.
The preparation process of the wave-transparent periodic structure layer or the resonance attenuation periodic structure layer comprises the following steps:
s12: sequentially grinding 50g of nano ITO powder, 5g of dispersing agent, 80g of resin (epoxy resin) and 400g of solvent (cyclohexane) mixture in a grinding machine and a nano grinding machine (the time is 1 hour), carrying out classification filtration and centrifugal precipitation to obtain ITO raw stock with the particle size of 0.5 mu m, and adding 100g of epoxy resin, 5.5g of flatting agent, 1.2g of film forming additive and 350g of xylene into the ITO raw stock to regulate and control the viscosity into slurry with the viscosity of 3000 mPas;
s12: coating a resin priming layer on the surface of the light chemical fiber cloth in a scraping mode, printing a Y-shaped conductive pattern with the square resistance of 500 omega/□ on the resin priming layer of the light chemical fiber cloth through a 100-mesh silk screen plate by using slurry obtained from S11, and obtaining a wave-transparent periodic structure layer;
and (3) coating a resin priming layer on the surface of the light chemical fiber cloth in a scraping manner, avoiding the position of the light chemical fiber cloth corresponding to the Y-shaped conductive pattern of the wave-transparent periodic structure layer, and printing a conductive coating on other positions on the resin priming layer of the light chemical fiber cloth by the slurry obtained from S11 through a 100-mesh silk screen plate to obtain the resonance attenuation periodic structure layer. In the embodiment, the sheet resistance of the conductive paint film of the upper resonance attenuation period structural layer is 250 omega/□, and the sheet resistance of the lower conductive paint film is 10 omega/□.
The preparation process of the resistance type loss wave-absorbing material layer comprises the following steps:
s21: mixing 40g of conductive graphite, 250g of resin (epoxy resin), 600g of solvent (cyclohexane), 10g of dispersing agent, 12g of flatting agent, 5g of bactericide, 10g of anti-aging agent and 40g of anti-ultraviolet agent, and stirring at 3000r/min for 4 hours to obtain conductive graphite slurry;
s22: soaking the light porous cloth in the conductive graphite slurry obtained in the step S21, spin-drying, and repeating the soaking and spin-drying processes for three times to obtain a conductive graphite slurry layer; the weight of the cloth is increased by 40 g; the single-layer thickness is 0.7 mm;
s23: according to the protection requirement, overlapping a plurality of layers of conductive graphite slurry layers obtained from S22 to obtain a resistance type loss wave-absorbing material layer; in this embodiment, the upper resistive loss wave-absorbing material layer includes three conductive graphite slurry layers, and the lower resistive loss wave-absorbing material layer includes 6 conductive graphite slurry layers.
The total thickness of the novel electromagnetic protective clothing fabric prepared by the embodiment is 9mm, and the surface density is 0.65kg/m2。
Fig. 7 is a graph showing the attenuation curve of the electromagnetic wave reflectivity of the resistive loss wave-absorbing material layer in the frequency band of 1 to 18GHz, and it can be seen from the graph that the absorption attenuation of the loss material layer used in this embodiment to the electromagnetic wave reflectivity of 1 to 2, 2 to 4, 4 to 8 and 8 to 18GHz is 4, 8, 9 and 19dB respectively, which shows that the resistive loss wave-absorbing material layer has a good effect on the absorption loss of the electromagnetic wave of 4 to 18GHz and a poor effect on the absorption loss of the electromagnetic wave of 1 to 4 GHz.
Fig. 8 shows that the absorption attenuation of the wave-transparent periodic structure layer and the multi-layer overlapping structure layer in the electromagnetic protective fabric used in this embodiment to the electromagnetic wave reflectivity of 1 to 2, 2 to 4, 4 to 8 and 8 to 18GHz is 7, 8, 12 and 18dB, respectively, and it can be seen that the introduction of the periodic structure improves the absorption attenuation performance of the fabric as a whole.
Fig. 9 is a graph showing electromagnetic shielding effectiveness of the electromagnetic shielding fabric of the electromagnetic shielding clothes according to the present embodiment in 1 to 18GHz band, and it can be known that the electromagnetic shielding effectiveness of the electromagnetic shielding fabric of the electromagnetic shielding clothes according to the present embodiment for 1 to 18GHz electromagnetic waves reaches more than 48 dB.
Example 3
This embodiment provides a novel electromagnetic protection clothes cloth, cloth top-down includes: a conductive cloth layer (the thickness is 0.6mm, the sheet resistance is 0.1 omega/□), a wave-transparent periodic structure layer, a multi-layer overlapped structure layer and a lining; and superposing and sewing the conductive cloth layer, the wave-transparent periodic structure layer, the multilayer overlapping structure layer and the lining in sequence to obtain the novel electromagnetic protective clothing fabric.
The multilayer overlapped structure layer comprises two resistance type loss wave-absorbing material layers and two resonance attenuation period structure layers, wherein the resistance type loss wave-absorbing material layers and the resonance attenuation period structure layers are alternately laminated; the side of the multilayer overlapping structure layer close to the wave-transparent periodic structure layer is a resistance-type loss wave-absorbing material layer, and the side close to the inner liner is a resonance attenuation periodic structure layer; the sheet resistance of the conductive paint film is gradually reduced from top to bottom by the two resonance attenuation period structural layers;
the conductive pattern of the wave-transparent periodic structure layer is Y-shaped; and the positions of the resonance attenuation periodic structure layer corresponding to the conductive patterns of the wave-transparent periodic structure layer are not printed with conductive coatings, and other positions are printed with conductive coatings.
The preparation process of the wave-transparent periodic structure layer or the resonance attenuation periodic structure layer comprises the following steps:
s12: grinding 150g of nano ITO powder, 10g of dispersing agent, 200g of resin (organic silicon resin) and 700g of solvent (toluene) mixture in a grinding machine and a nano grinding machine in sequence (the time is 1 hour), carrying out classification filtration and centrifugal precipitation to obtain ITO raw stock with the particle size of 3 microns, adding 400g of epoxy resin, 10g of flatting agent, 2g of film forming additive and 450g of xylene into the ITO raw stock, and regulating and controlling the viscosity to be slurry of 4000mPa s;
s12: coating a resin priming layer on the surface of the light chemical fiber cloth in a scraping mode, printing a Y-shaped conductive pattern with the square resistance of 600 omega/□ on the resin priming layer of the light chemical fiber cloth through a 100-mesh silk screen plate by using slurry obtained from S11, and obtaining a wave-transparent periodic structure layer;
and (3) coating a resin priming layer on the surface of the light chemical fiber cloth in a scraping manner, avoiding the position of the light chemical fiber cloth corresponding to the Y-shaped conductive pattern of the wave-transparent periodic structure layer, and printing a conductive coating on other positions on the resin priming layer of the light chemical fiber cloth by the slurry obtained from S11 through a 100-mesh silk screen plate to obtain the resonance attenuation periodic structure layer. In the embodiment, the square resistance of the conductive paint film of the upper resonance attenuation period structural layer is 300 omega/□, and the square resistance of the conductive paint film of the lower resonance attenuation period structural layer is 200 omega/□.
The preparation process of the resistance type loss wave-absorbing material layer comprises the following steps:
s21: mixing 80g of conductive graphite, 300g of resin (organic silicon resin), 1000g of solvent (toluene), 30g of dispersing agent, 30g of flatting agent, 10g of bactericide, 20g of anti-aging agent and 60g of anti-ultraviolet agent, and stirring at 6000r/min for 2 hours to obtain conductive graphite slurry;
s22: soaking the light porous cloth in the conductive graphite slurry obtained in the step S21, spin-drying, and repeating the soaking and spin-drying processes for three times to obtain a conductive graphite slurry layer; the weight of the cloth is increased by 80 g; the thickness of the single-layer cloth is 0.9 mm;
s23: according to the protection requirement, overlapping a plurality of layers of conductive graphite slurry layers obtained from S22 to obtain a resistance type loss wave-absorbing material layer; in this embodiment, the upper resistive loss wave-absorbing material layer includes two conductive graphite slurry layers, and the lower resistive loss wave-absorbing material layer includes four conductive graphite slurry layers.
The novel electromagnetism that this embodiment madeThe total thickness of the protective clothing fabric is 14mm, and the areal density is 0.78kg/m2。
Fig. 10 is a graph showing the attenuation curve of the electromagnetic wave reflectivity of the resistive loss wave-absorbing material layer in the frequency band of 1 to 18GHz, and it can be seen from the graph that the absorption attenuation of the loss material layer used in this embodiment to the electromagnetic wave reflectivity of 1 to 2, 2 to 4, 4 to 8 and 8 to 18GHz is 4, 11, 13 and 22dB respectively, which shows that the resistive loss wave-absorbing material layer has a good effect on the absorption loss of the electromagnetic wave of 4 to 18GHz and a poor effect on the absorption loss of the electromagnetic wave of 1 to 4 GHz.
Fig. 11 shows that the absorption attenuation of the wave-transparent periodic structure layer and the multi-layer overlapping structure layer in the electromagnetic protective fabric used in this embodiment is respectively 8dB, 12 dB, 14 dB, 23dB for the electromagnetic wave reflectivity of 1GHz to 2 GHz, 2 GHz to 4GHz, 4GHz to 8GHz, and it can be seen that the introduction of the periodic structure improves the absorption attenuation performance of the fabric as a whole.
Fig. 12 is a graph illustrating electromagnetic shielding effectiveness of the electromagnetic shielding fabric of the electromagnetic shielding clothes according to the present embodiment in a frequency band of 1 to 18GHz, and it can be seen from the graph that the electromagnetic shielding effectiveness of the electromagnetic shielding clothes fabric of the present embodiment on the electromagnetic waves of 1 to 18GHz reaches above 55 dB.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. The utility model provides a novel electromagnetic protection suit cloth which characterized in that, cloth top-down includes: the structure comprises a conductive cloth layer, a wave-transparent periodic structure layer, a plurality of overlapped structure layers and a lining;
the multilayer overlapped structure layer comprises a plurality of resistance type loss wave-absorbing material layers and a plurality of resonance attenuation period structure layers, and the resistance type loss wave-absorbing material layers and the resonance attenuation period structure layers are alternately laminated; the side of the multilayer overlapping structure layer close to the wave-transparent periodic structure layer is a resistance-type loss wave-absorbing material layer, and the side close to the inner liner is a resonance attenuation periodic structure layer; the square resistance of the conductive paint film is gradually reduced from top to bottom by the plurality of resonance attenuation period structural layers;
the conductive pattern of the wave-transparent periodic structure layer is Y-shaped; and the positions of the resonance attenuation periodic structure layer corresponding to the conductive patterns of the wave-transparent periodic structure layer are not printed with conductive coatings, and other positions are printed with conductive coatings.
2. The novel electromagnetic protective clothing fabric as claimed in claim 1, wherein the conductive fabric layer is formed by electroplating nickel-copper alloy on the surface of a metal fiber blended base fabric; the surface sheet resistance of the conductive cloth layer is 0.01-0.1 omega/□.
3. The novel electromagnetic protective clothing fabric as claimed in claim 1, wherein the wave-transparent periodic structure layer or the resonance attenuation periodic structure layer is realized by printing a conductive paste pattern on a base fabric, and the specific steps are as follows:
s11: grinding the mixture of the nano ITO powder, the dispersing agent, the resin and the solvent in a grinding machine and a nano grinding machine in sequence, then carrying out classified filtration and centrifugal precipitation to obtain ITO raw pulp, and then regulating and controlling the ITO raw pulp into pulp with the viscosity of 3000-4000 mPa s;
s12: coating a resin priming layer on the surface of the light chemical fiber cloth in a scraping mode, and printing a Y-shaped conductive pattern on the resin priming layer of the light chemical fiber cloth by using the slurry obtained in the step S11 through a screen printing method to obtain a wave-transparent periodic structure layer;
and (3) coating a resin priming layer on the surface of the light chemical fiber cloth in a scraping mode, avoiding the position of the light chemical fiber cloth, which corresponds to the Y-shaped conductive pattern of the wave-transparent periodic structure layer, and printing a conductive coating on other positions on the resin priming layer of the light chemical fiber cloth by using the slurry obtained in the step S11 through a screen printing method to obtain the resonance attenuation periodic structure layer.
4. The novel electromagnetic protective clothing fabric as claimed in claim 3, wherein the nano ITO powder is 50-150 g, the dispersant is 5-10 g, the resin is 80-200 g, and the solvent is 400-700 g; the average grain size of ITO powder in the ITO raw stock is 0.5-3 mu m.
5. The novel electromagnetic protective clothing material as claimed in claim 4, wherein the resin is one of epoxy resin, polyurethane, silicone resin, ethylene propylene rubber and styrene butadiene rubber.
6. A novel electromagnetic protective clothing cloth as claimed in any one of claims 3 to 5, wherein the sheet resistance of the conductive paint film of the wave-transparent periodic structure layer is 400 to 600 Ω/□; the conductive paint film square resistance of the resonance attenuation period structural layer is 10-300 omega/□.
7. The novel electromagnetic protective clothing cloth of claim 1, wherein the resistive loss wave-absorbing material layer is realized by dipping, and the specific steps are as follows:
s21: mixing and stirring conductive graphite, resin, a solvent, a dispersing agent, a flatting agent, a bactericide, an anti-aging agent and an anti-ultraviolet agent according to the weight ratio to obtain conductive graphite slurry;
s22: soaking the light porous cloth in the conductive graphite slurry obtained in the step S21, spin-drying, and repeating the soaking and spin-drying processes for a plurality of times to obtain a conductive graphite slurry layer;
s23: and according to the protection requirement, overlapping a plurality of layers of conductive graphite slurry layers obtained from S22 to obtain the resistance type loss wave-absorbing material layer.
8. A novel electromagnetic protective clothing sheet as claimed in claim 7,
in the S21, 40-80 g of conductive graphite, 200-300 g of resin, 600-1000 g of solvent, 10-30 g of dispersing agent, 10-30 g of flatting agent, 5-10 g of bactericide, 10-20 g of anti-aging agent and 40-60 g of anti-ultraviolet agent; the stirring time is 2-4 h, and the speed is 3000-6000 r/min;
in the step S22, the weight of the cloth of the conductive graphite slurry layer is increased to 40-80 g/m2；
In the step S23, the resistance type loss wave-absorbing material layer comprises 2-4 conductive graphite slurry layers.
9. The novel electromagnetic protective clothing cloth of claim 1, wherein the electromagnetic protective clothing cloth comprises two resistive loss wave-absorbing material layers and two resonance attenuation period structure layers; each layer of the resistance type loss wave-absorbing material layer is 2-5 mm in thickness, and the square resistance is 300-1000 omega/□; the square resistance of the conductive paint film of the upper resonance attenuation period structural layer is 200-300 omega/□, and the square resistance of the conductive paint film of the lower resonance attenuation period structural layer is 10-200 omega/□.
10. The novel electromagnetic protective clothing fabric as claimed in claim 9, wherein the electromagnetic protective clothing fabric has an overall thickness of 8 to 15mm and an areal density of 0.5 to 0.8kg/m2。
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