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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 between the flake magnetic powder and the polymer binder, the flake magnetic powder is usually treated with a coupling agent such as a silane coupling agent, but due to the amount of the flake magnetic powder If it is too large (the filling mass accounts for more than 85% of the mass of the entire flexible magnetic isolation sheet), adding a small amount (5%–10% of the mass of the magnetic powder) of the coupling agent cannot effectively improve the dispersion of the magnetic powder in the solvent And easy to settle and other characteristics, resulting in low magnetic permeability of the flexible magnetic isolation sheet, short communication distance

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
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Effect test

Embodiment 1

[0031] A magnetic isolation sheet for a high-frequency RFID electronic tag, comprising in parts by weight:

[0032]

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

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

[0035] Plasticizers in this embodiment are resins and other polymers with better flexibility; including o-phthalic polymers, triethyl phosphate, tributyl phosphate, polyester resins, modified epoxy resins, hydrogenated One or more of petroleum resin and silicone resin.

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

[0037] The coupling agent in this embodiment is a silane coupling agent and a titanate ...

Embodiment 2

[0047] Add 100 parts by mass of a mixture of sendust and sendust magnetic powder (the mass ratio of sendust to sendust is 1:1) into a heated stirrer, and add 5 parts by mass of NaOH and 95 Parts by mass of ethanol, ball milled for 6 hours to fully wet and disperse the magnetic powder in the solvent, filter and dry, then mix 100 parts by mass of FeSiAl magnetic powder, 2 parts by mass of γ-aminopropyltriethoxysilane and 198 parts by mass Add ethanol into a heated mixer, ball mill for 6 hours to fully wet and evenly disperse the magnetic powder in the solvent, heat to 80°C, continue stirring until the magnetic powder is dry and take out the magnetic powder for later use. The magnetic powder of 100 mass parts is joined in the ball mill tank, and the zirconium ball of 200 mass parts, the ethanol of 75 mass parts, the amine salt of the xylene of 75 mass parts and the dispersant polycarboxylic acid of 5 mass parts, ball mill 6h make The magnetic powder is fully wetted and uniformly ...

Embodiment 3

[0051] Add 100 parts by mass of a mixture of sendust, sendust and iron-nickel (the mass ratio of sendust, sendust and iron-nickel is 1:2:1) into the heated In a mixer, add 10 parts by mass of NaOH and 90 parts by mass of ethanol, ball mill for 6 hours to fully wet and disperse the magnetic powder in the solvent, filter and dry, then mix 100 parts by mass of FeSiAl magnetic powder, 5 parts by mass of coupling Vinyltriethoxysilane and 195 parts by mass of ethanol were added to a heated mixer, ball milled for 6 hours to fully wet and evenly disperse the magnetic powder in the solvent, heated to 80°C, and continued to stir until the magnetic powder was dried and The magnetic powder is taken out for later use. The magnetic powder of 100 mass parts is joined in the ball mill tank, and the zirconium ball of 200 mass parts, the ethanol of 75 mass parts, the amine salt of the xylene of 75 mass parts and the dispersant polycarboxylic acid of 5 mass parts, ball mill 6h make The magnetic...

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PUM

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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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