Composite melt-blown non-woven fabric and preparation method thereof

Abstract

The invention provides a composite melt-blown non-woven fabric and a preparation method thereof. The composite melt-blown non-woven fabric comprises at least one superfine fiber layer and at least onecommon fiber layer. The superfine fiber layers and the common fiber layers are superposed layer by layer through multi-nozzle melt spinning, and are finally reinforced to obtain the composite melt-blown non-woven fabric. Each superfine fiber layer is a superfine fiber layer with the diameter less than 500 nm, and is obtained by melt blended spinning of thermoplastic polymer and a matrix which areincompatible thermodynamically and removing the matrix through solvent extraction; each common fiber layer is obtained by melting and spinning a thermoplastic polymer without a matrix; and finally the composite melt-blown non-woven fabric with excellent comprehensive performance is obtained through hot rolling reinforcement treatment. The problems of complex preparation method, difficulty in large-scale production and nonuniformity of fiber performance in the prior art are solved, and a new idea is provided for preparing the functional non-woven fabric.

Description

technical field [0001] The invention belongs to the technical field of non-woven fabrics, and in particular relates to a composite melt-blown non-woven fabric and a preparation method thereof. Background technique [0002] Non-woven fabrics are commonly known as non-woven fabrics. It is a non-woven fabric formed by directional or random arrangement of short fibers or filaments to form a web structure, and then reinforced by mechanical, hot rolling or chemical methods. Non-woven fabrics have the characteristics of breathability, softness, light weight, non-toxic and non-irritating, rich colors, and low prices. For example, polypropylene (PP) pellets are used as raw materials, and polypropylene non-woven fabrics can be obtained through continuous one-step production of high-temperature melting, spinning, web laying, and hot-press coiling. Usually by preparing multi-layer composite non-woven fabrics, non-woven fabrics can be endowed with more special properties, such as good h...

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Problems solved by technology

[0005] In view of the above-mentioned defects in the prior art, the object of the present invention is to provide a composite melt-blown non-woven fabric and a preparation method thereof, the composite melt-blown non-woven fabric includes at least one layer of superfine fiber layer and at least one layer of ordinary fiber layer; by melt-blending spinning of a thermodynamically incompatible thermoplastic polymer and a matrix, and then removing the matrix to obtain the ultrafine fiber layer; by melt-spinning a thermoplastic polymer without a matrix, to obtain the ordinary fiber layer; and then The superfine fiber layer and the ordinary fiber layer are reinforced to obtain the composite melt-blown non-woven fabric, which overcomes the problems of complex preparation methods in the prior art, difficulty in large-scale production, and uneven fiber performance, and is functional The preparation of permanent non-woven fabrics provides new ideas

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