A kind of melt-blown polypropylene material and its preparation method and application

Abstract

The invention discloses a melt-blown polypropylene material and its preparation method and application, which consist of the following components: 65-80 parts of melt-blown polypropylene, 20-35 parts of low-isotactic polypropylene, and 2-2 parts of stearate 3 copies. The invention blends low-isotactic polypropylene LMPP with melt-blown polypropylene, which can effectively improve the handle of the melt-blown non-woven fabric, and the prepared melt-blown non-woven fabric has a soft feel, and has the advantages of high strength and high toughness. , At the same time, it can improve the particle filtration efficiency and air permeability of melt-blown non-woven fabrics. This material has broad application prospects in the preparation of high-filtration, low-resistance female / child masks that require a perfect fit for the face.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a melt-blown polypropylene material and a preparation method and application thereof. Background technique [0002] Melt-blown non-woven fabric is the key filter material in disposable medical surgical masks, medical N95 masks and other products, while melt-blown non-woven fabrics mainly use polypropylene as raw material, after feeding-melt extrusion-fiber formation-fiber cooling- It is prepared by processes such as netting-reinforcement into cloth. The diameter of the fibers formed by melt-blown can reach 1-5 microns, with many voids, fluffy structure, and good wrinkle resistance. These ultra-fine fibers with unique capillary structure increase the number and surface area of ​​fibers per unit area, thus making melt-blown nonwovens Cloth has excellent filterability, shielding, heat insulation and oil absorption. It can be used in air and liquid filter materials, iso...

AI Technical Summary

Problems solved by technology

[0003] However, in the process of preparing melt-blown non-woven fabrics for the existing melt-blown polypropylene materials, due to the high requirements for the particle filtration efficiency of melt-blown non-woven fabrics (the BFE of disposable medical surgical masks is required in the YY0469-2011 standard up to 95%), while satisfying the requirements of high-efficiency melt-blown non-woven fabrics, there are melt-blown non-woven fabrics that feel hard, and the cloth surface is hard and brittle, which will cause the mask prepared by it to wear. The cloth surface is broken and the mask is difficult to fit the wearer's face effectively

Moreover, for women and children, due to their small face area, this problem will be more severe, which will directly lead to the inability of masks to block droplets, bacteria, aerogels, etc. during use, threatening People's life and health during the epidemic

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