A kind of anti-virus and flame-retardant electromagnetic shielding composite material, preparation method and product

A composite material, electromagnetic shielding technology, applied in shielding, fire-resistant coatings, protective equipment, etc., can solve the problems of poor shielding efficiency, poor weather resistance, complex molding process, etc., and achieve good shielding effect.

Active Publication Date: 2018-07-10
北京邦维高科新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The combination of these two materials can meet the requirements of general tents, windproof, rainproof, and electromagnetic shielding, but this kind of tent has no protection against chemical and biological warfare agents, and cannot cope with combat command and medical operations in nuclear, biological and chemical environments.
[0003] Chinese patent CN104786574A discloses a flame-retardant fabric that can effectively prevent electromagnetic waves, including a cotton layer, an antistatic layer and a flame-retardant coating. The shielding layer of this material is mainly made of nano-metal shielding fiber yarns interwoven. Flame-retardant polyurethane coating is realized, but this material has no protective function against biological and chemical agents such as mustard gas, and the shielding effect is poor
To achieve the anti-penetration performance of the poisonous agent, the PVC material must reach a certain thickness, and the material weight will reach 900g / m 2 Above, and poor weather resistance
The disadvantage of rubber products is that they have a clear tendency to crystallize at low temperatures, tend to harden, and the molding process is complicated and inconvenient to manufacture.
[0006] Chinese patent 2006101036538 discloses a textile composite material, including a protective layer and a fabric layer. The barrier time of the material to mustard gas, nitrogen oxides, and unsymmetrical dimethylhydrazine is greater than 24 hours, but the material is not flame-retardant and has no resistance to mustard gas. The protection ability can reach 72 hours, and there is no electromagnetic shielding function

Method used

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  • A kind of anti-virus and flame-retardant electromagnetic shielding composite material, preparation method and product
  • A kind of anti-virus and flame-retardant electromagnetic shielding composite material, preparation method and product
  • A kind of anti-virus and flame-retardant electromagnetic shielding composite material, preparation method and product

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preparation example Construction

[0035] The preparation method of the anti-virus and flame-retardant electromagnetic shielding composite material of the present invention adopts a coating finishing and heavy pressing composite process, and the specific steps are:

[0036] Step 1: Test the flame retardant properties of the fabrics of the low-frequency shielding layer 2 and the low-frequency shielding layer 4. If the afterburning of the fabrics of the low-frequency shielding layer 2 and the low-frequency shielding layer 4 is not greater than 10s, proceed directly to the third step. step; if the fabric of the low-frequency shielding layer 2 and / or the low-frequency shielding layer 4 has an afterburn>10s, then proceed to the second step;

[0037] Step 2: Perform single-sided flame-retardant coating finishing on the low-frequency shielding layer 2 and / or low-high-frequency shielding layer 4 whose continuous combustion is greater than 10s. The specific process of coating finishing is:

[0038] a) Prepare polyuretha...

Embodiment 1

[0057] The anti-virus and flame-retardant electromagnetic shielding composite material of this embodiment includes an outer protective layer 1, a low-frequency shielding layer 2, a barrier layer 3, a low-frequency shielding layer 4, and an inner molding layer 5 from outside to inside, and an adhesive is passed between each layer. connected together in sequence; the square meter weight of the composite material is 420±20g / m 2 , the protection time against mustard gas reaches more than 72 hours, the electromagnetic shielding performance in the 200MHz-40GHz frequency band reaches more than 70dB, and the shielding effectiveness for the low-frequency magnetic field in the 100KHz-20MHz frequency band reaches more than 20dB.

[0058] The outer protective layer 1 of this embodiment is a polyvinylidene fluoride film with a thickness of 0.03 mm. The film has special properties such as good chemical corrosion resistance, high temperature and low temperature resistance, oxidation resistanc...

Embodiment 2

[0079] The composition and preparation method of the composite material in this example are the same as in Example 1, except that the outer protective layer of this example is a polyvinylidene chloride copolymer film with a thickness of 0.05 mm; the low-frequency shielding layer is a polyester stainless steel fiber blended fabric, square meters Gram weight is 120g / m 2 ;The barrier layer is polyester (PET) film with a thickness of 0.015mm, good mechanical strength, high hardness, excellent barrier performance, low temperature resistance, environmental protection and non-toxic; low-frequency shielding layer is nylon copper-nickel coating Fabric, the square meter weight is 50g / m 2 ; The inner molding layer is a flame-retardant polyethylene copolymer film with a thickness of 0.05mm; the materials of each layer are bonded and compounded by polyurethane adhesive in point form. The square meter weight of the composite material is 335±20g / m 2 , the overall thickness is 0.4mm.

[00...

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Abstract

The invention relates to anti- virus flame-retardant electromagnetic shielding composite material, a preparation method and a product. The anti- virus flame-retardant electromagnetic shielding composite material is sequentially prepared from a low-frequency shielding layer, a barrier layer and a low-high-frequency shielding layer from outside to inside, wherein all layers are sequentially connected together through adhesives; the low-frequency shielding layer is prepared from flame-retardant metal fiber blended fabric; the barrier layer is prepared from at least one of PA (Polyamide), PET (Polyethylene Terephthalate) or EVOH (Ethylene-Vinyl Alcohol Copolymer); the low-high-frequency shielding layer is prepared from copper-nickel coating fabric. According to the anti-gas flame-retardant electromagnetic shielding composite material disclosed by the invention, the gram weight per square meter is 100 to 700 g / m<2>, the protection time on mustard gas is up to 72 hours or more, the electromagnetic shielding performance within a frequency band of 200 MHz to 40 GHz can be up to 70 dB or more, the shielding performance of the low-frequency within a frequency band of 100 KHz to 20 MHz can be up to 20 dB or more, the afterflame time is less than or equal to 10 seconds, and the smoldering time is less than or equal to 10 seconds. The product which is prepared by adopting the anti-gas flame-retardant electromagnetic shielding composite material integrates biochemical protection, electromagnetic shielding and flame retardancy into a whole, and can more meet cutting-edge requirements in military and the like.

Description

technical field [0001] The invention relates to the technical field of safety protection, in particular to an anti-virus and flame-retardant electromagnetic shielding composite material, a preparation method and a product. Background technique [0002] The current domestic functional tent materials generally only have electromagnetic shielding function or nuclear, biological and chemical protection function, and generally do not have flame retardant function. Traditional electromagnetic shielding tents are generally made of shielding fabric and rainproof canvas. The shielding fabric is stainless steel blended fabric, silver-plated fabric and copper-nickel plated fabric, and the rainproof canvas is generally polyester coated fabric. The combination of these two materials can meet the requirements of general tents, windproof, rainproof, and electromagnetic shielding, but this kind of tent has no protection against chemical and biological warfare agents, and cannot cope with c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/02B32B27/12B32B27/30B32B27/32B32B27/34B32B27/36B32B27/40B32B15/02B32B15/082B32B15/09B32B15/18B32B9/02B32B9/04B32B7/12B32B33/00B32B37/10B32B37/12B32B38/16G21F1/12G21F3/02A62B17/00A41D19/015E04H15/54C09D175/04C09D5/18C09D7/65
CPCA41D19/01529A62B17/006B32B5/02B32B5/08B32B7/12B32B15/02B32B15/082B32B15/09B32B15/18B32B27/12B32B27/304B32B27/306B32B27/32B32B27/34B32B27/36B32B27/40B32B33/00B32B37/10B32B37/1284B32B38/164B32B2037/243B32B2038/166B32B2255/02B32B2255/205B32B2255/26B32B2262/0261B32B2262/0269B32B2262/0276B32B2262/0284B32B2262/062B32B2262/103B32B2262/14B32B2307/212B32B2307/306B32B2307/3065B32B2307/552B32B2307/554B32B2307/558B32B2307/714B32B2307/7145B32B2437/00B32B2437/02B32B2571/00C08L2201/02C09D5/18C09D7/65C09D175/04E04H15/54G21F1/12G21F3/02C08L83/04C08L33/04C08K2003/323
Inventor 韩德孝任玮张婷婷李科贾书刚王春姣霍晓兵
Owner 北京邦维高科新材料科技股份有限公司
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