Multi-layer melt-blown non-woven fabric and preparation method thereof

Abstract

The invention relates to a multi-layer melt-blown non-woven fabric and a preparation method thereof, in particular to an online electret process and a preparation method of the multi-layer melt-blownnon-woven fabric with different fibers. The multi-layer melt-blown non-woven fabric is composed of a melt-blown non-woven fabric layer A, a melt-blown non-woven fabric layer B and a melt-blown non-woven fabric layer C. The melt-blown non-woven fabric layer A is arranged at the upper portion of the melt-blown non-woven fabric layer B, and the melt-blown non-woven fabric layer C is arranged at the lower portion of the melt-blown non-woven fabric layer B. The multi-layer melt-blown non-woven fabric is a melt-blown non-woven fabric composed of three melt-blown non-woven fabric layers with different fiber diameters, namely the melt-blown non-woven fabric layer A, the melt-blown non-woven fabric layer B and the melt-blown non-woven fabric layer C. According to the multi-layer melt-blown non-woven fabric, the diameter range of the melt-blown fibers can be adjusted in a large range according to particles with different sizes in reality, so that the fabric can have higher dust containing capacity when large-particle particles in air are filtered, and can have higher filtering precision and efficiency when smaller particles are filtered; and the service life of the multi-layer melt-blown non-woven fabric is greatly prolonged.

Description

technical field [0001] The invention relates to a multi-layer melt-blown non-woven fabric and a preparation method thereof, which is a multi-layer melt-blown non-woven fabric prepared on-line electret with different fibers and a preparation method thereof. Background technique [0002] With the advancement and development of science and technology, air filtration products are used in all aspects of our lives. Melt-blown non-woven fabric, as a kind of nano-micro fiber, is widely used as a main effective filter material for effectively filtering whether it is liquid or air. [0003] The main working principles of air filters are interception, gravity, diffusion, inertia, and electrostatic species. The melt-blown nano-micro fibers form a 3D three-dimensional structure, which makes the fibers of the melt-blown non-woven fabric a good interception effect. After the melt-blown non-woven fabric is processed by electrostatic electret, the Coulomb force of the charged fiber is used...

AI Technical Summary

Problems solved by technology

[0004] At present, our common melt-blown non-woven fabric production line is a single-screw extrusion single-spinneret equipment. This equipment can only provide a single fiber diameter or a small range of variable diameters, and the degree of change is not large. This will also cause the produced melt-blown non-woven fabric to be used in air filtration, and it is only suitable for filtering particles with a certain particle size.

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