Melt-blown polypropylene material with long-acting filtering function and preparation method and application thereof

Abstract

The invention belongs to the field of high polymer materials, and particularly relates to a melt-blown polypropylene material with a long-acting filtering function and a preparation method and application of the melt-blown polypropylene material. The melt-blown polypropylene material comprises the following components in parts by weight: 100 parts of polypropylene; 0.2-0.5 part of a peroxide initiator; 0.1-1 part of nano diatomite; 0.1-2 parts of nano tourmaline powder; 0.1-2 parts of a silane coupling agent; 0.05-0.3 part of a lubricating agent; 0.05-0.3 part of an antioxidant; and 0.05-0.2 part of a nucleating agent. The nano tourmaline powder is conveyed into pores of the nano diatomite to form the nano composite material through organic solvent infiltration and ultrasonic treatment bymeans of electronegativity and a multi-stage open pore structure of the nano tourmaline powder, so that the problem that electronegativity of melt-blown cloth taking the tourmaline powder as an electret declines due to long-term exposure in air is reduced, the electrostatic adsorption capacity and the long-acting filtering function can be effectively improved, the process is simple, and batch production is facilitated.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a melt-blown polypropylene with long-term filtering function and its preparation method and application. Background technique [0002] Melt-blown polypropylene has ultra-high fluidity, and its melt index is as high as 1500g / 10min. Melt-blown non-woven fabrics with a fiber diameter of about 1-3um can be produced by melt-blown technology. The fiber web has good uniformity, fluffy structure, High porosity, increasing the number of fibers per unit area and increasing the specific surface area, the filtering effect can reach 70%. If it is further treated with electret, electret masterbatch is added to the polypropylene raw material, and high-voltage electrostatic discharge is added during production The device makes the polypropylene melt-blown cloth have the ability to capture and store charges, so that it has the effect of long-term adsorption of particles in the air, ma...

AI Technical Summary

Problems solved by technology

The most commonly used electret agent on the market is tourmaline powder, which can increase the charge traps in melt-blown non-woven fabrics. Patent CN201210544735.1 discloses a method of preparing melt-blown polypropylene filter material by adding tourmaline powder as an electret However, the surface charge of the polypropylene melt-blown cloth prepared by adding an inorganic charge enhancer is affected by the humid environment, which will cause charge attenuation and poor long-term filtration performance.

[0003] Diatomaceous earth is a kind of biogenetic siliceous sedimentary rock with a unique multi-level open pore structure. The pore diameter is mainly macropores, containing a small amount of mesopores, and the porosity is as high as 90%. It has electronegativity and strong adsorption performance. , the skeleton structure is stable, the bulk density is small, it can be used as a filter aid adsorption material, the use of diatomite is mainly concentrated in sewage treatment, and the application of melt-blown polypropylene non-woven fabrics has not been effectively developed, so it is necessary and necessary to use its unique Physical structure and performance characteristics Developed melt-blown polypropylene with long-term filtering function

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