Spunbond filament electrostatic skeleton filtering material and preparation method and application thereof

Abstract

The present invention provides a spunbond filament electrostatic skeleton filtering material and a preparation method and application thereof. The preparation method comprises the following steps of 1) melt spinning, wherein a component A and a component B are subjected to melt spinning to form continuous double-component composite filaments with skin-core structures, the component A and / or the component B contains high polymers and functional mediums with the electricity storage functions, and the high polymers in the component A and the component B are two types of fiber-forming polymers with different melting point temperatures; 2) web forming, wherein the continuous double-component composite filaments with the skin-core structures are split to form a web; 3) reinforcement forming, wherein a non-woven material is formed by hot air melt bonding; and 4) high-voltage electrostatic treatment, wherein the non-woven material is charged. The filtering material has double filtering functions of physical blockage and electrostatic adsorption, and can directly folded, the filtering efficiency can reach the level H11, and the filtering resistance is lower than 10 Pa.

Description

technical field [0001] The invention relates to the field of non-woven fabrics, in particular to a spun-bonded filament electrostatic skeleton filter material and a preparation method and use thereof. Background technique [0002] In the field of air filtration such as vehicle-mounted air conditioners and fresh air purification, the mainstream technologies and products in the domestic and foreign markets are mainly composite textile filter materials. The filter materials have reached the corresponding filtration efficiency. Most of them are composite materials related processes and products, especially in the field of medium and high-efficiency filtration, that is, F-grade and H-grade filter materials, which are mostly melt-blown fine filter materials. It is compounded with non-woven fabric skeleton reinforcement materials through glue compounding, ultrasonic bonding or high temperature and high pressure compounding, so as to meet different levels of filtration standards and...

AI Technical Summary

Problems solved by technology

Patent CN105999856A discloses an energy-enhancing polypropylene / polyester two-component spun-bonded filter material and its preparation method, which mainly adopts multi-layer spun-bonded filament webs of different finenesses to be superimposed and then reinforced to form, and finally electro- The filter material obtained by corona charging involves multi-channel processing, the process control points are many and complex, and the product filtration resistance is relatively large; patent CN105964059A discloses a kind of energy-enhancing polyethylene / polypropylene two-component spunbond filter material and its The preparation method, the principle of the main invention content and the corresponding product specificity are the same as above; the patent CN1055586714A discloses a high electrostatic long fiber non-woven fabric and its manufacturing method, which relates to a filament spunbond filter material with a skin-core structure, which mainly uses Inorganic particles are added to the cortex material to make non-woven fabrics and then electrostatically treated to finally obtain filter materials, but it is difficult to control the spinning process and tow quality after adding inorganic substances, and the filtration performance after electrostatic treatment is batch Instability and other problems, in addition, inorganic particles can only be added to the skin layer, the process is single, and it is difficult to mix fine particles and polymer slices evenly, and there is a risk of unstable final product quality

[0004] Among many different types of composite filter materials, although it has the advantages of fine filtration and high dust holding capacity, its multi-layer composite process control is relatively more fine and complex. The manufacturing process of composite materials is divided into multiple steps. The performance index and yield of the material are very high, and the glue lamination process is the mainstream processing technology. Among them, the type, smell and environmental protection of the glue all have potential safety hazards to human health; before the composite filter material is processed into a filter Mechanical discounting is required. During the process, composite materials are prone to problems such as surface material wear, fluffing, and delamination, which will lead to a decrease in the performance of the filter material, and it is difficult to control the cost and yield rate; in addition, composite materials are generally melt-blown materials or electrostatic cotton. Materials are compositely processed by glue lamination or hot rolling or ultrasonic lamination. The specific process determines that the filtration resistance of the product material is generally large, which objectively increases the energy consumption of the air purification system.

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