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

Abstract

The invention discloses melt-blown polypropylene as well as a preparation method and application thereof. The melt-blown polypropylene comprises following raw polypropylene resin, a degradation agent,an antioxidant and a lubricant, wherein the degradation agent is selected from one or more of hydrogen peroxide, sodium percarbonate, ammonium percarbonate and urea peroxide. The melt-blown polypropylene also comprises a nucleating agent selected from one or more of dibenzylidene sorbitol, aryl phosphate and nano scale amorphous silicon dioxide, wherein the degradation agent and the nucleating agent respectively account for 0.05-0.5% of the mass percentage of the raw materials. The preparation method comprises the following steps: premixing raw materials, stirring, then selectively adding a deodorant; and melting and granulating by an extruder to obtain the product. The invention also discloses an application of the melt-blown polypropylene in manufacturing melt-blown non-woven fabrics, melt-blown filter elements and sound-absorbing cotton. The melt-blown polypropylene has the advantages of low odor, high electret charge stability and the like.

Description

technical field [0001] The invention belongs to the technical field of melt-blown polypropylene, in particular to a melt-blown polypropylene with low odor and high electret charge stability, a preparation method and application thereof. Background technique [0002] Melt blown grade polypropylene is a polypropylene resin used in a melt blown process (melt blown), mainly used in the manufacture of melt blown non-woven fabrics, melt blown filter elements, sound-absorbing cotton and other materials. Generally, the melt-blown process requires resin materials to have very high fluidity and narrow molecular weight distribution, and the high-end field also requires materials to meet the requirements of low odor, safety and environmental protection. [0003] At present, the methods for preparing meltblown grade polypropylene mainly include controlled rheology method and hydrogen adjustment method. Controlled rheology technology (controlled rheology) is a relatively popular method f...

AI Technical Summary

Problems solved by technology

However, there is a problem that organic peroxides are decomposed to generate volatile small molecule by-products, resulting in a special smell of melt-blown polypropylene, and even causing adverse effects on human health.

The mechanical barrier mainly depends on the microporous structure of the melt-blown non-woven fabric. The smaller the micro-pores, the smaller the pollutant particles (PM2.5, bacteria, viruses, etc.) that the melt-blown non-woven fabric can filter, but the smaller the micro-pores will be Makes the gas resistance of the melt-blown non-woven fabric higher, affecting the use

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