Method for manufacturing ultrafine fiber suede leather with electromagnetic shielding function

Abstract

The invention discloses a method for manufacturing ultrafine fiber suede leather (microfiber suede leather for short) with an electromagnetic shielding function. The method is characterized in that nano electromagnetic shielding materials (titanium carbide (Ti3C2TX), conductive carbon black, graphene, carbon nanotubes, carbonyl iron and ferroferric oxide) are dispersed into a solvent-type impregnation polyurethane sizing agent, a sea-island-type microfiber non-woven fabric impregnated with the above sizing agent is placed in a solidification liquid to solidify, and then reduction, washing, drying and after-finishing are performed to obtain the microfiber suede leather. The microfiber suede leather with the electromagnetic shielding function prepared by the technology is endowed with a honeycomb structure by water and solvent exchange in the solidification process, the polyurethane and nano electromagnetic shielding materials form the skeleton of the honeycomb structure, and sea components are removed in the reduction process to generate a porous structure. When electromagnetic waves enter microfibers, the nano electromagnetic shielding materials cooperate with the porous structureto produce obvious loss of the electromagnetic waves, the microfiber suede leather has significant shielding performance under the high-frequency electromagnetic waves of 8.2-12.4 GHz, and the shielding performance does not decline with the prolongation of use time.

Description

technical field [0001] The invention relates to the field of superfine fiber synthetic leather, in particular to a method for manufacturing superfine fiber suede leather with electromagnetic shielding function. Background technique [0002] Microfiber synthetic leather is a composite material developed based on dissolved island-in-the-sea superfine fibers, which are composed of superfine fibers and polyurethane. Microfibers are bundled, and their fineness and structure are similar to collagen fibers. The superfine fibers are three-dimensionally cross-linked in the superfine fiber synthetic leather, which acts as a support for the skeleton; the polyurethane distributed around the fibers makes the entire synthetic leather base fabric form an organic whole, which not only has filling in the base fabric Moreover, it forms a circular, fingerprint-shaped or honeycomb-shaped cell structure. These cell structures are intertwined and connected, so that the microfiber synthetic leath...

AI Technical Summary

Problems solved by technology

Chinese Patent No. CN 104862986 A discloses a method for preparing colored electromagnetic shielding fabrics. Chemically polymerizable organic dyes are used to color the textiles, and then the dyes are polymerized into conductive polymers by chemical polymerization. However, this type of fabric is only The electromagnetic shielding performance is only shown in the lower frequency band, which limits its application range

However, since the nano-metal powder is only sprayed on the surface of the leather, the main part of its electromagnetic shielding is the surface coating. When the surface coating is damaged by wear and tear, the leather loses its electromagnetic shielding performance and does not have the durability of electromagnetic shielding.