Graphene RFID electronic tag suitable for gravure printing method preparation

An electronic label and gravure printing technology, which is applied in the field of RFID electronic labels, can solve the problems affecting the quality of RFID electronic labels, the reduction of electrical conductivity, heat conduction and impact resistance, hard breakdown of RFID electronic labels, etc., and achieve excellent charge mobility and reduce wire drawing The effect of avoiding the occurrence of static electricity

Active Publication Date: 2021-12-14
SHANDONG HUAGUAN SMART CARD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although graphene has good electrical and thermal conductivity, after it is made into printing paste, in order to improve its adhesion, wear resistance and other properties, so that it can adapt to the needs of gravure printing, the electrical conductivity, thermal conductivity, and resistance of the graphene paste obtained The impact resistance is often greatly reduced, and the heat capacity of graphene printing paste is generally low. When printing RFID electronic tags with graphene paste, they are subjected to high temperature and impact generated by electrostatic discharge, which may easily cause RFID electronic tags to harden. Breakdown or soft breakdown can easily cause the printed electronic label to fly or draw, which directly affects the quality of the RFID electronic label. The electrostatic protection of graphene paste in the gravure printed RFID electronic label needs to be optimized urgently

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0035] Adopt the following method to prepare and obtain graphene slurry:

[0036] The first step: prepare graphene nanosheet powder, cured resin, surfactant, dispersant;

[0037] Under the condition of turning on ultrasonic dispersion and magnetic stirring at the same time, add the above-mentioned surfactant to the cured resin and mix evenly, after mixing, add graphene and continue ultrasonic dispersion and magnetic stirring to obtain a mixed system;

[0038] The second step: add the above-mentioned dispersant to the mixing system, and continue stirring for 3 hours to obtain the graphene slurry.

[0039] Adopt the following method to prepare graphene RFID electronic tag.

[0040] The first step: attach the graphene slurry in the ink tank to the gravure groove of the gravure roller, scrape off the excess conductive ink with a scraper, and then roll through the gravure roller and embossing roller Transfer to a substrate to obtain a printed substrate;

[0041] The second step:...

Embodiment 1

[0043] Adopt the following method to prepare and obtain graphene slurry:

[0044] The first step: prepare 12 parts of graphene nanosheet powder (average particle size 25 microns, sheet thickness 3 nanometers), including o-cresol novolac epoxy resin with a mass ratio of 70:10:18:1.8:0.5 and a molecular weight of 2000 24 parts of cured resin of polyurethane, methyl tetrahydrophthalic anhydride, trimethylolpropane, toluene-2,4-diisocyanate, including sodium dodecylbenzenesulfonate with a mass ratio of 0.5:1.2 and a polymer with a degree of polymerization of 9 1 part of surfactant of sodium lauryl alcohol polyoxyethylene ether sulfate, 7 parts of SPERSE HLD-69 dispersant;

[0045] Under the condition that the ultrasonic dispersion with an ultrasonic frequency of 40 kHz and the magnetic stirring with a stirring rate of 1500 r / min are turned on at the same time, the above-mentioned surfactant is added to the cured resin and mixed uniformly. After mixing, graphene is added in 10 time...

Embodiment 2-7

[0052] The graphene slurry of Example 2-7 was obtained by the above method, which is recorded as graphene slurry series one, the difference is only that the type and parts by weight of the surfactant and cured resin used are different, see Table 1 for details .

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Abstract

The invention relates to the technical field of RFID electronic tags, and particularly provides a graphene RFID electronic tag suitable for gravure printing method preparation. The graphene RFID electronic tag comprises a base material and graphene conductive paste printed on the base material by adopting the gravure printing method. The graphene conductive paste comprises the following components in parts by weight: 5-10 parts of graphene, 1-3 parts of a surfactant, 5-10 parts of a dispersant, and 15-25 parts of cured resin. The cured resin is prepared from o-cresol formaldehyde epoxy resin, polyurethane, methyl tetrahydrophthalic anhydride, trimethylolpropane and toluene-2,4-diisocyanate in the mass ratio of (70-90):(10-30):(18-23):(1.8-5.5):(0.5-1.6). The surfactant is prepared from sodium dodecyl benzene sulfonate and sodium alcohol ether sulphate according to the mass ratio of (0.5-0.8):(1.2-1.5). The graphene slurry provided by the invention is dispersed in the cured resin in the presence of the specific surfactant, and is supplemented with the specific dispersant and the auxiliary agent to prepare the printing slurry, and the printing slurry is used for resisting static electricity when an RFID electronic tag is prepared by an intaglio printing technology.

Description

technical field [0001] This application relates to the technical field of RFID electronic tags that use radio waves to send and receive information, and in particular to a method for preparing antistatic graphene slurry suitable for gravure printing to prepare RFID tags, and the graphene obtained by using this method slurry. Background technique [0002] At present, some foreign manufacturers who develop radio frequency identification technology RFID have started to use graphene slurry to print the key technology and industrialization research of RFID electronic tags, such as the British BGTM company. Gravure printing technology is a graphic reproduction technology with high precision, large output and suitable for ink printing, which can be applied to the production of RFID electronic tags. [0003] Electrostatic discharge, referred to as ESD (Electro Static Discharge), is a huge hidden danger in the electronics manufacturing industry and seriously affects the development ...

Claims

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Application Information

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IPC IPC(8): C09D11/102C09D11/52G06K19/067
CPCC09D11/102C09D11/52G06K19/067
Inventor 刘振禹陈韶华魏洪标亓秀昌刘慧靖李健冷金凤
Owner SHANDONG HUAGUAN SMART CARD
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