High-performance electromagnetic shielding clothing fabric and electromagnetic shielding clothing

Abstract

The present invention discloses a high-efficiency electromagnetic shielding clothing fabric and electromagnetic shielding clothing, the electromagnetic shielding clothing fabric is composed of a functional composite layer and an inner lining; the inner lining is detachably connected to the inner side of the functional fabric; the functional composite layer is composed of a conductive cloth, a hydrophobic protective cloth and an absorbing material layer, the conductive cloth, the hydrophobic protective cloth and the absorbing material layer are stacked and fixedly connected, and the hydrophobic protective cloth is located between the conductive cloth and the absorbing material layer; the electromagnetic shielding clothing is made of the electromagnetic shielding clothing fabric described above. The electromagnetic shielding clothing fabric and electromagnetic shielding clothing provided by the present invention can effectively reduce the penetration of low-frequency electromagnetic waves. Within the frequency range of 1 to 40 GHz, the vertical incidence shielding effectiveness reaches more than 50 dB, and the average absorption attenuation efficiency reaches more than 10 dB. It has good electromagnetic shielding effectiveness for both vertical and oblique incident electromagnetic waves, and is thin, breathable, easy to put on and take off, etc., suitable for human body wear.

Description

Technical Field

[0001] The invention relates to the technical field of electromagnetic shielding, in particular to a high-performance electromagnetic shielding clothing fabric and an electromagnetic shielding clothing. Background Art

[0002] In recent years, electromagnetic radiation pollution has become a key area of ​​concern. Some jobs are exposed to electromagnetic radiation pollution with high power, high energy and wide frequency band, which has serious harmful effects on the health of relevant workers. Relevant studies have shown that long-term exposure to electromagnetic environment can cause serious damage to vulnerable systems such as the cardiovascular and reproductive systems of human beings.

[0003] Traditional electromagnetic shielding clothing is mainly made of a single conductive cloth, which has poor shielding performance for high-frequency electromagnetic waves. If there are gaps in the shielding clothing, electromagnetic waves from all directions will easily penetrate into the shielding clothing. At this time, the penetrating electromagnetic waves will reflect and oscillate multiple times between the shielding clothing and the human body, and will eventually be absorbed by the human body, thus seriously damaging human safety. In view of the problems existing in traditional electromagnetic shielding clothing, it is necessary to improve the existing technology. Summary of the invention

[0004] The present invention provides a high-efficiency electromagnetic shielding clothing fabric and electromagnetic shielding clothing, which are used to overcome the defects of the prior art such as poor shielding performance for high-frequency electromagnetic waves, and achieve good shielding effect for wide-band, high-power, high-energy, omnidirectional electromagnetic waves.

[0005] To achieve the above object, the present invention provides a high-performance electromagnetic shielding clothing fabric, which is composed of a functional composite layer and an inner lining; the inner lining is detachably connected to the inner side of the functional fabric;

[0006] The functional composite layer is composed of a conductive cloth, a hydrophobic protective cloth and an absorbing material layer, which are stacked and fixedly connected, and the hydrophobic protective cloth is located between the conductive cloth and the absorbing material layer; the side close to the conductive cloth is the outer side of the functional cloth, and the side close to the absorbing material layer is the inner side of the functional cloth.

[0007] Preferably, the conductive cloth is a metal fiber cloth with a nickel metal layer plated on the surface.

[0008] Preferably, the surface resistance of the conductive cloth is 0.01-0.1Ω / □.

[0009] Preferably, the hydrophobic protective cloth is a polyurethane cloth with a silicone coating on the surface.

[0010] Preferably, the surface hydrophobic angle of the hydrophobic protective cloth is 95-120° and the density is 30-70 g / m 2 .

[0011] Preferably, the absorbing material layer is made of a nano absorber and a polyurethane matrix by foaming.

[0012] Preferably, the surface density of the absorbing material layer is 500-1200 g / m 2 , thickness is 5-10 mm, square resistance is 500-4000Ω / □; the nano absorber is carbon slurry with a solid content of 30-50%.

[0013] Preferably, the lining is polyester cloth.

[0014] To achieve the above object, the present invention further provides a high-performance electromagnetic shielding clothing, which is made of the high-performance electromagnetic shielding clothing fabric described above.

[0015] Preferably, the electromagnetic shielding suit comprises a top, trousers, underwear and gloves; the total weight of the electromagnetic shielding suit is less than 3kg; the interfaces of the electromagnetic shielding suit are designed to fit closely to the human body; the interfaces include the collar of the top, the cuffs of the top, the hem of the top, the waistband of the trousers, the leg opening of the trousers, the waistband of the underwear and the opening of the gloves.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The electromagnetic shielding clothing fabric provided by the present invention is composed of a functional composite layer and an inner lining; the inner lining is detachably connected to the inner side of the functional fabric; the functional composite layer is composed of a conductive fabric, a hydrophobic protective fabric and an absorbing material layer, the conductive fabric, the hydrophobic protective fabric and the absorbing material layer are stacked and fixedly connected, and the hydrophobic protective fabric is located between the conductive fabric and the absorbing material layer; the side close to the conductive fabric is the outer side of the functional fabric, and the side close to the absorbing material layer is the inner side of the functional fabric. The electromagnetic shielding clothing fabric shields electromagnetic waves through the conductive cloth and the absorbing material layer; low-frequency (below 1GHz) electromagnetic waves are mainly shielded by the reflection mechanism of the outer conductive cloth, and a small amount of low-frequency electromagnetic waves that pass through the conductive cloth will be absorbed by the absorbing material layer; high-frequency (1-40GHz) electromagnetic waves are mainly realized by the reflection of the conductive cloth and the absorption of the absorbing material layer. The conductive cloth will first reflect the high-frequency electromagnetic waves, but due to the strong penetration of high-frequency electromagnetic waves, a part of the high-frequency electromagnetic waves will pass through the conductive cloth. At this time, the absorbing material layer will absorb the high-frequency electromagnetic waves that pass through the conductive cloth, thereby effectively protecting the electromagnetic waves of each frequency band from damage to the human body, so that the electromagnetic shielding clothing fabric has the advantages of high shielding efficiency, and has a good shielding effect on electromagnetic waves with wide frequency band, high power, large energy and omnidirectional. At the same time, the hydrophobic protective cloth in the electromagnetic shielding clothing fabric can not only play a waterproof role, but also protect the absorbing material layer, thereby increasing the service life of the electromagnetic shielding clothing fabric. In addition, the electromagnetic shielding clothing fabric is designed with an inner lining to increase the flexibility and comfort of the electromagnetic shielding clothing fabric. At the same time, the inner lining is detachably connected to the inner side of the functional fabric to facilitate cleaning and replacement of the inner lining.

[0018] 2. The electromagnetic shielding clothing provided by the present invention is made of the high-performance electromagnetic shielding clothing fabric described above, so the electromagnetic shielding clothing has the advantages of high shielding efficiency and has a good shielding effect on wide-band, high-power, high-energy, and omnidirectional electromagnetic waves. In the 1-40GHz frequency range, the vertical incident shielding efficiency of the electromagnetic shielding clothing reaches more than 50dB, and the average absorption attenuation efficiency reaches more than 10dB. It has good electromagnetic shielding efficiency for both vertical and oblique incident electromagnetic waves, and is thin, breathable, and easy to put on and take off, and is suitable for human wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1A schematic diagram of the structure of an electromagnetic shielding clothing fabric provided by an embodiment of the present invention;

[0021] Figure 2 A schematic diagram of the front structure of an electromagnetic shielding suit provided by an embodiment of the present invention;

[0022] Figure 3 Schematic diagram of a transmittance testing system in an embodiment of the present invention;

[0023] Figure 4 Schematic diagram of a reflectivity testing system in an embodiment of the present invention;

[0024] Figure 5a This is a diagram showing the shielding and absorption attenuation performance of the absorbing material layer in an embodiment of the present invention for electromagnetic waves with a frequency of 1 to 18 GHz;

[0025] Figure 5b This is a diagram showing the shielding and absorption attenuation performance of the absorbing material layer in an embodiment of the present invention for electromagnetic waves with a frequency of 26.5 to 40 GHz;

[0026] Figure 6a A diagram showing the shielding performance of the electromagnetic shielding clothing provided in an embodiment of the present invention against electromagnetic waves with a frequency of 8 to 18 GHz;

[0027] Figure 6b This is a diagram showing the shielding performance of the electromagnetic shielding clothing provided in an embodiment of the present invention against electromagnetic waves with a frequency of 18 to 40 GHz.

[0028] Explanation of the accompanying drawings: 101 conductive cloth; 102 hydrophobic protective cloth; 103 absorbing material layer; 2 lining; 3 top; 4 pants; 5 underwear; 6 gloves; 301 collar of top; 302 cuffs of top; 303 hem of top; 401 waistband of pants; 402 leg opening of pants; 501 waistband of underwear; 601 opening of gloves; 7 vector network analyzer; 8 cable; 9 electromagnetic wave receiving end; 10 electromagnetic wave transmitting end; 11 absorbing foam panel; 12 network analyzer; 13 receiving antenna; 14 transmitting antenna; 15 absorbing material; 16 aluminum plate substrate; 17 test sample.

[0029] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] Unless otherwise specified, all drugs / reagents used were commercially available.

[0033] The present invention provides a high-efficiency electromagnetic shielding clothing fabric, which is composed of a functional composite layer and an inner lining 2; the inner lining 2 is detachably connected to the inner side of the functional fabric, which is convenient for replacement and cleaning of the inner lining 2;

[0034] The functional composite layer is composed of a conductive cloth 101, a hydrophobic protective cloth 102 and an absorbing material layer 103. The conductive cloth 101, the hydrophobic protective cloth 102 and the absorbing material layer 103 are stacked and fixedly connected, and the hydrophobic protective cloth 102 is located between the conductive cloth 101 and the absorbing material layer 103; the side close to the conductive cloth 101 is the outer side of the functional cloth, and the side close to the absorbing material layer 103 is the inner side of the functional cloth.

[0035] Preferably, the fixed connection may be sewing, gluing, etc.; the detachable connection includes buckling, etc.

[0036] Preferably, the conductive cloth 101 is a metal fiber cloth with a nickel metal layer plated on the surface, which is beneficial for reflecting and shielding low-frequency (below 1 GHz) electromagnetic waves.

[0037] Preferably, the surface square resistance of the conductive cloth 101 is 0.01-0.1Ω / □, which is conducive to reflection and shielding of low-frequency (below 1 GHz) electromagnetic waves.

[0038] Preferably, the hydrophobic protective cloth 102 is a polyurethane cloth coated with a silicone coating on the surface, which can protect the inner absorbing material layer 103 to prevent the absorbing material layer 103 from being damaged.

[0039] Preferably, the weight of the polysiloxane coating is 15 g / m 2 The total weight of the hydrophobic protective cloth 102 is 45g / m 2 .

[0040] Preferably, the surface hydrophobic angle of the hydrophobic protective cloth 102 is 95-120°, and the density is 30-70 g / m 2 , so as to facilitate the hydrophobic protective cloth to play its hydrophobic role.

[0041] Preferably, the absorbing material layer 103 is made of a nano absorber and a polyurethane matrix by foaming, which is beneficial to the absorption of high-frequency (1-40 GHz) electromagnetic waves and improves the shielding effectiveness of low-frequency electromagnetic waves.

[0042] Preferably, the surface density of the absorbing material layer 103 is 500-1200 g / m 2 , thickness of 5-10mm, square resistance of 500-4000Ω / □; the nano absorber is carbon paste with a solid content of 30-50%. To ensure good shielding effect on electromagnetic waves with wide frequency band, high power, large energy and omnidirectional.

[0043] Preferably, the lining 2 is made of polyester fabric, which is used to improve the comfort of the shielding clothing fabric and at the same time plays a certain protective role on the functional fabric.

[0044] Preferably, the surface density of the lining 2 is about 30 g / m 2 .

[0045] The present invention also provides a high-performance electromagnetic shielding clothing, which is made of the high-performance electromagnetic shielding clothing fabric mentioned above.

[0046] The electromagnetic shielding suit has a good shielding effect on wide-band, high-power, high-energy, omnidirectional electromagnetic waves; at the same time, the detachable design of the lining 2 facilitates its replacement and cleaning; in addition, the design of the lining 2 increases the wearing comfort of the electromagnetic shielding suit.

[0047] Preferably, the electromagnetic shielding suit comprises a top 3, bottom pants 4, underwear 5 and gloves 6; the total weight of the electromagnetic shielding suit is less than 3kg, and the weight of a single top or bottom pants or underwear or gloves is less than 2kg, so as to reduce the sense of weight and increase the comfort of wearing; the interface of the electromagnetic shielding suit is designed to fit closely to the human body, and the tightness and fit with the human body can be easily adjusted, and the gap in the contact part with the human body can be reduced, so that low-frequency electromagnetic waves are difficult to enter the inside of the shielding suit, and the amount of high-frequency electromagnetic waves entering is minimized; the interface includes any place connected to the outside world, such as the collar 301 of the top, the cuffs 302 of the top, the hem 303 of the top, the waist 401 of the bottom pants, the leg opening 402 of the bottom pants, the waist 501 of the underwear and the opening 601 of the gloves.

[0048] Preferably, the gap between the interface and the human body reaches the millimeter level, which reduces the gap between the shielding suit and the human body and reduces the penetration of low-frequency electromagnetic waves.

[0049] Preferably, the body-fitting design includes elastic, Velcro and other modes.

[0050] Example 1

[0051] This embodiment provides a high-performance electromagnetic shielding clothing fabric and an electromagnetic shielding clothing.

[0052] (1) Electromagnetic shielding clothing fabrics, such as Figure 1As shown, it includes a functional fabric and an inner lining 2; the inner lining 2 is detachably connected to the inner side of the functional fabric by means of buckles; the functional fabric includes a conductive fabric 101, a hydrophobic protective fabric 102 and an absorbing material layer 103; the hydrophobic protective fabric 102 is located between the conductive fabric 101 and the absorbing material layer 103; the side close to the conductive fabric 101 is the outer side of the functional fabric, and the side close to the absorbing material layer 103 is the inner side of the functional fabric.

[0053] The conductive cloth 101 uses a stainless steel fiber blended polyester fiber cloth as a base, with a nickel-copper coating on the surface, a surface square resistance of 0.022Ω / □, and a shielding effectiveness of 35-40dB.

[0054] The hydrophobic protective cloth 102 is made of polyurethane cloth with a thin layer of low surface energy polysiloxane coating on the surface. The weight of the polysiloxane coating is 15g / m 2 The surface hydrophobic angle of the hydrophobic protective cloth is 95-120° and the density is 30-70g / m 2 , the total weight of the hydrophobic protective cloth is 45g / m 2 .

[0055] The core material of the absorbing material layer 103 is made by adding 30g of polyurethane slurry containing 40% carbon slurry into 100g of polyurethane foam material, and then cutting into two layers of 4mm absorbing material layers 103 after foaming and molding, with a surface density of about 650g / m 2 , the square resistance of the absorbing material layer is 500~4000Ω / □.

[0056] Lining 2 is ordinary polyester fabric with a surface density of about 30g / m 2 .

[0057] (2) Electromagnetic shielding clothing, such as Figure 2 As shown, the electromagnetic shielding clothing fabric prepared in step (1) comprises a top 3, bottom pants 4, underwear 5 and gloves 6; the total weight of the electromagnetic shielding clothing is less than 4 kg, and the weight of a single top 3 or bottom pants 4 or underwear 5 or gloves 6 is less than 2 kg.

[0058] The interface of the electromagnetic shielding suit is designed to fit closely to the human body, specifically in an elastic mode; the interface includes the collar 301, the cuffs 302, the hem 303, the waist 401, the leg opening 402, the waist 501 and the glove opening 601. The gap between the shielding suit and the human body is 1 to 3 mm.

[0059] 1. Conduct transmittance shielding effectiveness test on the electromagnetic shielding clothing prepared in this embodiment:

[0060] Cut the electromagnetic shielding suit into 18*18cm squares as required; see the test device Figure 3, mainly including a vector network analysis instrument 7; a cable 8; an electromagnetic wave receiving end 9; an electromagnetic wave transmitting end 10; and an absorbing foam panel 11.

[0061] Test results see Figure 6a and Figure 6b ,from Figure 6a and Figure 6b It can be seen that the electromagnetic shielding clothing has a shielding efficiency of more than 50dB for electromagnetic waves in the range of 8 to 40 GHz, that is, only one in a hundred thousand electromagnetic waves can penetrate the electromagnetic shielding clothing head-on, indicating that the electromagnetic shielding clothing provided by the present invention has a good shielding effect for wide-band, high-power, high-energy, and omnidirectional electromagnetic waves.

[0062] 2. The electromagnetic wave absorption and attenuation performance of the absorbing material layer 103 in the electromagnetic shielding clothing fabric provided in this embodiment is tested:

[0063] Test equipment see Figure 4 , mainly includes a network analyzer 12; a receiving antenna 13; a transmitting antenna 14; an absorbing material 15; an aluminum plate substrate 16; and a test sample 17.

[0064] Test results see Figure 5a and Figure 5b ,from Figure 5a and Figure 5b It can be seen that the average absorbing performance of the absorbing material layer 103 in the electromagnetic shielding clothing fabric reaches 10dB at 1-18GHz, and there is a strong resonance absorption peak at 5.8GHz, reaching 18dB; the average absorbing performance of the absorbing material layer 103 at 26.5-40GHz reaches more than 15dB, indicating that the adopted absorbing material layer 103 has a good absorption and attenuation effect on electromagnetic waves, and can meet the requirements of the shielding clothing for electromagnetic wave absorption performance.

[0065] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A high-performance electromagnetic shielding clothing fabric, characterized in that: The electromagnetic shielding clothing fabric is composed of a functional composite layer and an inner lining; the inner lining is detachably connected to the inner side of the functional composite layer; The functional composite layer is composed of a conductive cloth, a hydrophobic protective cloth and a wave-absorbing material layer, which are stacked and fixedly connected, and the hydrophobic protective cloth is located between the conductive cloth and the wave-absorbing material layer; The side close to the conductive cloth is the outer side of the functional composite layer, and the side close to the absorbing material layer is the inner side of the functional composite layer; The hydrophobic protective cloth is a polyurethane cloth with a silicone coating on the surface; The lining is made of polyester fabric; The wave absorbing material layer is made by foaming a nano absorber and a polyurethane matrix.

2. The high-performance electromagnetic shielding clothing fabric according to claim 1, characterized in that: The conductive cloth is a metal fiber cloth with a nickel metal layer plated on the surface.

3. The high-performance electromagnetic shielding clothing fabric according to claim 1, characterized in that: The surface resistance of the conductive fabric is 0.01-0.1Ω / □.

4. The high-performance electromagnetic shielding clothing fabric according to claim 1, characterized in that: The surface hydrophobic angle of the hydrophobic protective cloth is 95-120°, and the density is 30-70 g / m 2 .

5. The high-performance electromagnetic shielding clothing fabric according to claim 1, characterized in that: The surface density of the absorbing material layer is 500-1200 g / m 2 , thickness is 5~10mm, and square resistance is 500~400Ω / □; the nano absorber is a carbon slurry with a solid content of 30~50%.

6. A high-performance electromagnetic shielding suit, characterized in that: The electromagnetic shielding clothing is made of the high-performance electromagnetic shielding clothing fabric described in any one of claims 1 to 5.

7. The high-performance electromagnetic shielding clothing as claimed in claim 6, characterized in that: The electromagnetic shielding suit comprises a top, trousers, underwear and gloves; the total weight of the electromagnetic shielding suit is less than 3kg; the interfaces of the electromagnetic shielding suit are designed to fit closely to the human body; the interfaces include the collar of the top, the cuffs of the top, the hem of the top, the waistband of the trousers, the leg opening of the trousers, the waistband of the underwear and the opening of the gloves.

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