Melt-blown polypropylene composition as well as preparation and application thereof

Abstract

The invention discloses a melt-blown polypropylene composition as well as a preparation method and application thereof. The melt-blown polypropylene composition is prepared from the following components in parts by weight: polypropylene resin 90-99 parts, fiber-forming masterbatch 0.5-10 parts, free radical initiator 0.1-1 parts, wherein the fiber-forming masterbatch includes the following components: polypropylene resin 30 to 90 parts by weight, hyperbranched associative polymer 5 to 35 parts, and interfacial barrier agent 5 to 35 parts. The melt-blown non-woven fabric fiber produced by the melt-blown polypropylene composition prepared by the invention has uniform diameter, good hand feeling and bulkiness and good filtering rate, and the safety of a mask is effectively improved.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a melt-blown polypropylene composition and a preparation method and application thereof. Background technique [0002] The new crown pneumonia (COVID-19) at the end of 2019 has affected more than 210 countries and regions. The new crown virus is mainly transmitted through respiratory droplets. In high-risk areas, patients, doctors and even ordinary people generally use disposable medical masks. Melt-blown cloth is one of the main structures of masks, and it is the core structure that effectively blocks viruses and bacteria. Melt-blown cloth is mainly made of ultra-high flow polypropylene, and adopts melt-blown non-woven technology. , rapid high-power stretching and curing forming, short process flow, and can directly prepare non-woven fabrics. [0003] During the production process of melt-blown cloth, the temperature of hot air can reach 250°C and above. If the dist...

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Problems solved by technology

[0003] During the production process of melt-blown cloth, the temperature of hot air can reach 250°C and above. If the distance (DCD) between the receiving device and the spinneret is small, the cooling of the fiber is insufficient, the residual heat is large, and the surface temperature is high, which is easy to cause burns. Silk, resulting in thicker fibers, uneven fibers, wider diameter distribution, harder melt-blown cloth, and increased breathing resistance

On the other hand, the fiber diameter is relatively thick, which cannot form a fiber filter layer with multiple curved channels, and the surface area is small, the electret efficiency is reduced, and the electrostatic adsorption capacity is weakened, resulting in a reduction in filtration efficiency and a reduction in the effective barrier effect of the mask.

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