Magnetic separator for high frequency RFID electronic label and preparation method thereof

A technology of electronic label and magnetic isolation sheet, which is used in the manufacture of inductors/transformers/magnets, circuits, electrical components, etc., can solve the problems of settlement, large amount of flake magnetic powder, short communication distance, etc., to prevent mutual contact and improve dispersion. performance, high production efficiency

Active Publication Date: 2018-05-18
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for flexible magnetic isolation sheets, the selected magnetic powder is in the form of flakes, and an excessively high filling ratio will destroy the morphology of the magnetic powder and its dispersion and arrangement in the binder, and due to the high density of the flake magnetic powder, the magnetic powder If the filling amount is too large, the magnetic powder will easily disperse unevenly in the solvent, and sedimentation will occur, which is not conducive to the preparation and casting of slurry
In order to improve the dispersibility of the flake magnetic powder in the solvent and enhance the strengthening effect of the interface bet

Method used

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  • Magnetic separator for high frequency RFID electronic label and preparation method thereof
  • Magnetic separator for high frequency RFID electronic label and preparation method thereof
  • Magnetic separator for high frequency RFID electronic label and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0030] Example 1

[0031] A magnetic isolation sheet for high-frequency RFID electronic tags, including parts by weight:

[0032]

[0033] The magnetic powder in this embodiment includes one or more of sendust, sendust chromium, iron nickel, and sendust nickel. The magnetic powder in this embodiment is a sendust.

[0034] The binder in this embodiment is a high molecular polymer, including one of polyvinyl butyral, polyvinyl acetal, ethyl cellulose, cellulose acetate butyrate, acrylic resin, epoxy resin, and polyurethane. Kind or several.

[0035] The plasticizers in this embodiment are resins with better flexibility and other high molecular polymers; including ortho-benzene polymers, triethyl phosphate, tributyl phosphate, polyester resin, modified epoxy resin, hydrogenated One or more of petroleum resin and silicone resin.

[0036] The alkaline solution in this embodiment is low-concentration sodium hydroxide or ammonia.

[0037] The coupling agents in this embodiment are silane cou...

Example Embodiment

[0046] Example 2

[0047] Add 100 parts by mass of the mixture of sendust and sendust chromium magnetic powder (the mass ratio of sendust and sendust is 1:1) into the mixer with heating, and add 5 parts by mass of NaOH and 95 Mass parts of ethanol, ball milled for 6 hours to make the magnetic powder fully wetted in the solvent and dispersed uniformly, filtered and dried, then 100 parts by mass of FeSiAl magnetic powder, 2 parts by mass of γ-aminopropyltriethoxysilane and 198 parts by mass Add ethanol to a heated mixer, ball mill for 6 hours to make the magnetic powder fully wetted in the solvent and evenly dispersed, heat to 80°C, continue stirring until the magnetic powder is dried and take out the magnetic powder for use. Add 100 parts by mass of magnetic powder to the ball milling tank, and add 200 parts by mass of zirconium balls, 75 parts by mass of ethanol, 75 parts by mass of xylene and 5 parts by mass of dispersant polycarboxylic acid amine salt, ball mill for 6h The mag...

Example Embodiment

[0050] Example 3

[0051] Add 100 parts by mass of a mixture of sendust, sendust, and iron-nickel magnetic powders (the mass ratio of sendust, sendust, and iron-nickel magnetic powder is 1:2:1) to the heated Add 10 parts by mass of NaOH and 90 parts by mass of ethanol into the mixer, ball mill for 6 hours to make the magnetic powder fully wetted in the solvent and uniformly dispersed, filter and dry, then 100 parts by mass of FeSiAl magnetic powder, 5 parts by mass of coupling Add vinyl triethoxy silane and 195 parts by mass of ethanol into a heated mixer, ball mill for 6 hours to make the magnetic powder fully wetted in the solvent and evenly dispersed, heated to 80 ℃, continue to stir until the magnetic powder is dried Take out the magnetic powder for later use. Add 100 parts by mass of magnetic powder to the ball milling tank, and add 200 parts by mass of zirconium balls, 75 parts by mass of ethanol, 75 parts by mass of xylene and 5 parts by mass of dispersant polycarboxylic ...

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Abstract

The invention discloses a magnetic separator for a high frequency RFID electronic label. The magnetic separator comprises, by weight, 100 parts of magnetic powder, 5-20 parts of binder, 1-10 parts ofplasticizer, 1-10 parts of alkaline solution, 0.1-5 parts of coupling agent, 0.1-5 parts of dispersant and 150-350 parts of solvent. The invention further discloses a preparation method of the magnetic separator for the high frequency RFID electronic label. The magnetic separator is advantaged in that the magnetic powder is made to more easily combine with the coupling agent, an insulation layer is formed on the surface of the sheet-shaped magnetic powder, mutual contact among the magnetic powder is effectively prevented, and good dispersibility, simple process, easy control, high production efficiency and continuous production are realized.

Description

technical field [0001] The invention belongs to the technical field of electromagnetic compatibility, and in particular relates to a magnetic isolation sheet for a high-frequency RFID electronic tag and a preparation method thereof. Background technique [0002] RFID is the abbreviation of Radio Frequency Identification, that is, radio frequency identification. It uses radio frequency to carry out non-contact two-way communication to achieve the purpose of identification and exchange data. It automatically identifies the target object and obtains relevant data through radio frequency signals. The identification work does not require manual intervention and can work in various harsh environments. RFID technology can identify high-speed moving objects and can identify multiple tags at the same time, and the operation is fast and convenient. Compared with traditional magnetic card and IC card technology, radio frequency identification (RFID) technology has the characteristics...

Claims

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Application Information

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IPC IPC(8): G06K19/02G06K19/077H01F1/01H01F41/02
CPCG06K19/022G06K19/07745H01F1/01H01F41/02
Inventor 郝斌刘立东叶怡婷陈浩
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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