Excellent electric cotton non-woven fabric material and preparation method thereof

Abstract

The invention provides a preparation method of an excellent electric cotton non-woven fabric material. The preparation method comprises the steps of premixing, preparation of high-performance electret master batches, melt extrusion, fiber cooling, fiber mixing, drafting and lapping, needling and opening, and electrostatic adding. The excellent electrical cotton non-woven fabric prepared by the preparation method has the advantages that the impedance is as low as 2Pa, the filtering efficiency reaches 60%, and the resistance is reduced by 50% compared with that of a traditional PET short fiber carding process; the mechanical strength is high, the gram weight is 25.5-40.3 g / m<2>, the longitudinal breaking strength can reach 40 N / 5 cm or above, and the transverse breaking strength can reach 30 N / 5 cm or above; the air permeability reaches 6000-8000 mm / s; the loading dust holding effect is good; and after being placed at the temperature of 45 DEG C and the humidity of 90% for 60 days, the filter efficiency can still reach 60% or above, and the efficiency attenuation rate is low.

Description

technical field [0001] The invention belongs to the technical field of non-woven fabrics, and in particular relates to a non-woven fabric material and a preparation method thereof. Background technique [0002] Non-woven fabrics, also known as non-woven fabrics, non-woven fabrics, have excellent properties such as moisture-proof, breathable, light weight, easy to decompose, non-toxic, non-irritating, and recyclable. They can be widely used in medical protective consumables, thermal insulation materials, and filter materials. , medical and health materials, oil-absorbing materials, wiping cloths, battery separators, and sound insulation materials. Electrostatic cotton, as a kind of non-woven fabric, is a non-woven material obtained by carding PP short fibers and needle-punched into a net through electrostatic electret treatment. Because it has undergone electrostatic treatment, it is called electrostatic cotton. Electrostatic cotton has It is superior to the filtration effic...

AI Technical Summary

Problems solved by technology

[0003] However, the electrostatic cotton material of the prior art still has the following technical defects: large air resistance, unsatisfactory filtration efficiency, fast decay of electrostatic adsorption capacity, and short service life of masks

[0004] Patent CN112693182A discloses a gradient filter electrostatic cotton and its production method, including a first electrostatic cotton layer, a second electrostatic cotton layer and a melt-blown cloth layer, the first electrostatic cotton layer and the melt-blown cloth layer are located on the second electrostatic cotton layer On both sides, the bulkiness of the first electrostatic cotton layer is greater than that of the second electrostatic cotton layer. The fluffy first electrostatic cotton layer can intercept large particles of dust, and the dense second electrostatic cotton layer can intercept small particles. However, the gradient filter electrostatic cotton prepared by this patent still cannot solve the problem of fast decay of electrostatic adsorption capacity.

[0005] Patent CN110499586A discloses an electrostatic cotton material and its preparation method and application. The electrostatic cotton material is composed of two-component composite filaments, and the two components are in a parallel structure in the composite filament. Among them, the melt index of the A component material It is 34g / 10min~42g / 10min; the intrinsic viscosity of component B material is 0.60dl / g~0.69dl / g, and the oxygen index exceeds 28.0%, but the electrostatic cotton material prepared by this patent has a large air resistance and a long service life of the mask not long

Images