A double-sided grid airgel insulation blanket with good air permeability for firefighters
A air-permeable airgel technology, which is applied in heat-insulating protection devices, protective devices against harmful chemicals, respiratory protection containers, etc. The problem of sharp reduction and other problems can be achieved to improve the effect of low mechanical strength, improve thermal protection performance, and improve air permeability
Active Publication Date: 2021-07-23
CIVIL AVIATION UNIV OF CHINA
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Problems solved by technology
Even so, these heat protection products inevitably bring about prominent problems such as sharp drop in air permeability and weak airgel adhesion, which seriously affect the comfort of wearing clothes. Therefore, it is urgent to develop flexible airgel heat protection products with better performance.
Method used
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Embodiment 1
[0020] like figure 1 As shown, the grid template used in the present invention is an equidistant hollow structure made of stainless steel, and the template area is 15 × 15cm 2 , The thickness is divided into three specifications: 0.25mm, 0.5mm and 1mm, and the grid width is divided into four specifications: 0.25cm, 0.5cm, 0.75cm and 1cm.
[0021] Mix the resin, airgel particles, dispersant and thickener uniformly in a certain proportion to prepare an airgel coating emulsion, and use the above-mentioned grid template to displace the upper and lower surfaces of the aramid felt, and remove the grid After the template was dried at 80 °C for 3 h to form an airgel coating, thus obtaining the following figure 2 Double-sided grid airgel insulation blanket shown.
[0022] Among them, aramid-based felt 1 is a needle-punched non-woven felt for fire-fighting clothing insulation layer, which is composed of 80% Nomex and 20% Kevlar fibers, with a thickness of 0.82mm and a surface density...
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Abstract
The utility model relates to a double-sided grid airgel thermal insulation felt for firefighting clothing with good air permeability. It is composed of aramid-based felt and airgel coatings respectively compounded on the upper and lower surfaces of the aramid-based felt. The effect of the present invention: the silicon dioxide airgel powder is compounded with the aramid-based felt in the form of a coating, which improves the disadvantages of the silicon dioxide airgel such as low mechanical strength, weak adhesion, and friable powder drop; the double-sided grid is adopted The special coating structure of the grid forms several equal-proportion air grooves between the grid bars, and the air grooves cooperate with the airgel particles in the airgel coating to significantly improve the thermal protection performance of the insulation blanket . The gas on both sides of the airgel thermal insulation blanket is connected to each other, allowing the sweat vapor on the body surface to be discharged smoothly through the gaps of the grid bars, and improving the air permeability of the airgel coated fabric. By changing the coating structure to improve the air permeability of the airgel thermal insulation blanket, compared with the single-side coated airgel thermal insulation blanket, no additional clothing load is added. The manufacturing process is simple, the process is easy to control, and the production cost is low.
Description
technical field [0001] The invention belongs to the technical field of heat protection materials, and in particular relates to a double-sided grid airgel thermal insulation blanket with good air permeability for firefighting clothing. Background technique [0002] Airgel (also known as xerogel) is a three-dimensional network solid material with a dispersion medium as gas, and is currently the smallest solid material in the world. There are many types of aerogels, but the most studied and most widely used aerogels are still inorganic SiO 2 Airgel products have excellent characteristics such as low bulk density, high porosity, large specific surface area, and low thermal conductivity. At present, they have been successfully applied in aerospace, building energy conservation, chemical engineering, and low-temperature protection. Therefore, the development potential and The application prospect is broad. [0003] As the necessary protective equipment for fire fighting and resc...
Claims
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IPC IPC(8): D06N3/00D06N3/14D06N3/12D06N3/04D06N7/00A62B17/00
CPCA62B17/003D06N3/0011D06N3/0034D06N3/0063D06N3/042D06N3/128D06N3/14D06N7/0092D06N2201/0272D06N2205/10D06N2209/065D06N2209/123D06N2211/10D06N2213/02
Inventor 陈维旺刘沙周晓猛张海军
Owner CIVIL AVIATION UNIV OF CHINA