A kind of manufacturing method of superfine fiber spunlace nonwoven filter material

Abstract

The present invention provides a method for manufacturing a superfine fiber spunlace non-woven filter material. The method includes the following steps: (1) raw material preparation; (2) melt spinning; (3) fiber processing; (4) carding (5) Spunlace reinforcement; (6) Smooth roll pressing; (7) Heating and drying; (8) Electret treatment; (9) Coiling finished products. In the present invention, the nano-electret powder and the resin are uniformly mixed and spun to obtain short fibers through spunlace reinforcement and electret processes, and the obtained ultrafine fiber spunlace non-woven fabric filter material has good filtration efficiency and low gas Resistance and high mechanical tensile strength, its filtration performance will not be attenuated due to changes in the external environment, and can be used to make filter materials for various industrial dust removal, protective clothing, and protective masks to meet the requirements of high-efficiency air purification.

Description

technical field [0001] The invention relates to the technical field of non-woven fabrics, in particular to a method for manufacturing a filter material of ultrafine fiber spunlace non-woven fabrics. Background technique [0002] With the rapid development of society and economy, the scale of industrialization has continued to expand, and it has also brought about the worsening air pollution problem. Among them, fine particulate matter (PM2.5, PM1.0, etc.) is not only the most complex air pollutant, but also the most harmful particle pollutant to the human body, which has seriously affected people's physical and mental health. Nonwoven filter materials have been widely used in the air filtration industry due to their short processing flow and low cost. The non-woven materials currently used in air filtration mainly include spunbond materials, needle punched materials, hot air materials, meltblown materials, electrospinning materials and their combination materials. [0003]...

AI Technical Summary

Problems solved by technology

The fibers of electrospinning materials are very thin. Although the fiber diameter reaches the nanometer level, this technology cannot meet the needs of commercial applications due to low production efficiency, and the material strength is low. It needs a base fabric that can provide it with the necessary mechanical strength. Composite use; polypropylene resin with high melt index for melt-blown nonwovens, stretched by high-speed and high-temperature hot air to obtain ultra-fine fibers with a diameter of 1-10 μm, small fiber diameter, large specific surface area, high porosity, and filtration resistance Small and other characteristics, the same melt-blown nonwoven fabric is limited by the production process, the product strength is poor, and the stiffness is low, it is difficult to use it directly as a filter material alone, and it needs a composite base fabric as a support

[0005] In the prior art, the method of making filter materials by using spunlace nonwoven production technology, such as patent CN201610020275.0, discloses a method for manufacturing two-component ultrafine nonwoven filter materials, specifically polyester, polyamide, and poly Any two kinds of ethylene are used as raw materials for mechanical energy composite spinning. By controlling the airflow drafting pressure, two kinds of spunbonded fiber webs with a large difference in fiber linear density are obtained, and the two kinds of fiber webs are laid and passed through multiple water channels. The final ultrafine fiber non-woven filter material is formed by piercing and consolidation. This material only relies on the dense pore size to intercept particulate matter, and the filtration efficiency is only about 30%, and there is a defect that the smaller the pore size, the greater the filtration resistance, which does not meet high-efficiency filtration. requirements for use

Patent CN201520841416.6 provides a polyester spunlace filter felt with a split fiber surface layer of orange segment, which is still a composite material and is applied to flue gas and exhaust gas filtration. It can capture PM2.5 particles through gradient filtration, but it can also It only relies on the simple filter material pore size for physical interception and filtration, and the filtering effect on fine dust and other particulate matter (such as particles around 0.3M) is average

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