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Method for manufacturing ultrafine fiber suede leather with electromagnetic shielding function

An ultra-fine fiber, electromagnetic shielding technology, applied in textiles and papermaking, etc., can solve the problems of lack of electromagnetic shielding durability, leather loss of electromagnetic shielding performance, limited application scope, etc., to achieve excellent electromagnetic shielding performance, improve electromagnetic shielding performance. , Increase the effect of electromagnetic wave dissipation

Inactive Publication Date: 2020-10-23
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Preparation of impregnated polyurethane slurry: In 100 parts of solvent-based polyurethane with a solid content of 28%, add 50 parts of dimethylformamide and 2 parts of titanium carbide (Ti 3 C 2 T X ), then add an appropriate amount of color paste and 0.5 parts of fluorine-containing hydrophobic surfactant, and then make nano titanium carbide (Ti 3 C 2 T X ) uniformly dispersed in polyurethane to obtain a polyurethane slurry with a solid content of 20%;

[0021] (2) Impregnation: impregnate the PA6 / COPET ultrafine fiber non-woven fabric in the impregnated polyurethane slurry prepared in step (1), then squeeze the roller, and then scrape off the impregnating liquid on the surface with a scraper;

[0022] (3) Coagulation, weight reduction, and finishing: The impregnated microfiber non-woven fabric is solidified by a wet coagulation process, and the polyurethane forms a "honeycomb" structure between the fibers of the base fabric, and then the fiber is opened by al...

Embodiment 2

[0025] (1) Polyurethane slurry preparation: In 100 parts of solvent-based polyurethane with a solid content of 30%, add 50 parts of dimethylformamide, 3 parts of graphene with a thickness of about 1 nm and a single-layer diameter of 0.2-10 µm and 7 Carbonyl iron with a particle size of 50-100nm, and then add 0.5 part of silicon-containing hydrophobic surfactant, and then disperse nano-graphene and nano-carbonyl iron in polyurethane uniformly by means of ultrasonic-assisted stirring, and obtain a solid content of 25 % of polyurethane slurry;

[0026] (2) Impregnation: The PA6 / PET ultrafine fiber non-woven fabric is impregnated with the impregnated polyurethane slurry prepared in step (1), followed by roller extrusion, and then the surface impregnated liquid is scraped off with a scraper;

[0027] (3) Coagulation, weight reduction, and finishing: The impregnated microfiber non-woven fabric is solidified by a wet coagulation process, and the polyurethane forms a "honeycomb" struc...

Embodiment 3

[0030] (1) Polyurethane slurry preparation: Add 70 parts of dimethylformamide to 100 parts of solvent-based polyurethane with a solid content of 32%, add 2.5 parts of multi-walled carbon nanotubes with an outer diameter of 10-20nm and 2.5 parts of granular ferric oxide with a diameter of 300-600nm, then add 0.5 part of hydrophobic surfactant containing long-chain alkyl, and then disperse multi-walled carbon nanotubes and nano ferric oxide in polyurethane uniformly by means of ultrasonic-assisted stirring , to obtain a solid content of 22.4% polyurethane slurry;

[0031] (2) Impregnation: impregnate PET / COPET ultrafine fiber non-woven fabrics in the impregnated polyurethane slurry prepared in step (1), then squeeze the roller, and then scrape off the impregnated liquid on the surface with a scraper;

[0032] (3) Coagulation, weight reduction, and finishing: The impregnated microfiber non-woven fabric is solidified by a wet coagulation process, and the polyurethane forms a "hone...

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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...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): D06N3/14D06N3/00
CPCD06N3/0004D06N3/0011D06N3/005D06N3/0063D06N3/0075D06N3/0086D06N3/14D06N2209/048D06N2211/28
Inventor 范浩军李静向均崔梦杰陈意颜俊王丽
Owner SICHUAN UNIV
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