CN105260765A - Care label-based UHF RFID tag based on screen printing - Google Patents
Care label-based UHF RFID tag based on screen printing Download PDFInfo
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Abstract
The present invention relates to a care label-based UHF RFID tag based on screen printing. A manufacturing method of the care label-based UHF RFID tag based on screen printing comprises the steps of: selecting a care label as a substrate for printing an antenna; then printing electrically conductive printing ink on the substrate to form an antenna through a screen printing method; after drying, bonding a connecting band of a UHF RFID tag chip to the antenna by a conductivity type binder; and finally performing coating protection for the chip, wherein a coating material adopts flexible resin. Compared with the prior art, the care label-based UHF RFID tag of the present invention has the beneficial effects that: the flexibility of the care label is retained by the care label-based UHF RFID tag; the care label-based UHF RFID tag is perfectly fit with clothes; the UHF RFID antenna is endowed with a certain flexibility, and can bear certain bending or deformation; the care label-based UHF RFID tag is simple in structure and convenient in manufacture; the care label-based UHF RFID tag is printed by a screen printing machine, can achieve mass production, and is suitable for popularization.
Description
Technical field
The present invention relates to one with flexibility washing mark textile material for substrate, method for printing screen is adopted to print the technology of the RFID label tag of wearable, water-fastness type uhf band, belong to the technical field that radio-frequency (RF) identification combines with textile garment, be mainly used in the logistics of textile garment, management and false proof.
Background technology
RFID (radio-frequency (RF) identification), as a kind of advanced technology of Internet of things of 21 century high-intelligentization, has infiltrated at present in mankind's daily life and has also developed gradually.A rfid system that is complete, that can normally work at least comprises two parts: electronic tag and reading device.The ultra-thin IC label that electronic tag is made up of coupling element and chip, its core component is the antenna of chip and responsible sending and receiving signal.Compared with traditional information labels, as bar code, Quick Response Code, the advantage of RFID label tag is a lot of, especially read the RFID label tag (hereinafter referred to as UHFRFID label) of UHF (ultrahigh frequency) frequency range of distance, be mainly reflected in and read environment strong adaptability, multiple reading simultaneously, memory capacity is large, security good and read-write five large advantages.In view of these benefits, UHFRFID label is widely used in the various aspects such as logistics, library, commodity, charge station, military affairs.Certainly, at textile and garment enterprise, the message identification, stock control, anti-counterfeiting for clothing etc. of textile and clothing production have very large demand to UHFRFID label, but the current not water-fastness or flexibility difference of the UHFRFID label of commercial applications etc., the usability of clothes or the functional impact be subject to after application in various degree, these defects hinder UHFRFID label technique applying at textile and garment enterprise.
For the field be combined with RFID at textile garment, wish that UHFRFID label perfectly can be combined with clothes, become a part for clothes, neither affect the outward appearance of clothes, also do not affect clothes to the comfort of people.Now commercially there is the UHFRFID label that many self-adhesive papers are sewed up, and the application obtained to a certain extent, but its production cost is relatively high for the rate of profit of textile and garment enterprise, and its mechanical and physical performance differs greatly for marked textile and clothing production.Chinese patent (patent publication No.: CN203311453U) " RFID label tag for a kind of uhf band of clothing product ", mainly its tow sides are clung by adhesive sticker by the uhf band RFID label tag being used for clothing product, then dress-goods inside is sewed up, to complete the recognition and tracking to clothes.This UHFRFID label also has significant limitation for the use on clothes, the clothes next to the skin such as such as thinner shirt, underwear, even if do not consider that label adopts the problem sewing up technique and bring, adhesive sticker is comparatively hard for weaving face fabric and body surface, is difficult to naturally to become a part for clothes and does not bring potential damage to the skin of wearer.For the dress materials that those are very thin, adhesive sticker RFID label tag is sewn on the outward appearance that outside have impact on clothes, and being sewn on inside affects again sense comfortable and easy to wear, and when adhesive sticker deforms, inner label is difficult to return to original shape, also affects the reading effect of label to a certain extent.Described in Chinese patent (patent publication No.: CN202563538U) " lining type is anti-uncovers RFID adhesive sticker mark ", label construction is provided with the first non-drying glue layer, front printed layers, electronic chip layer, back face printing layer, the second non-drying glue layer and pet layer from inside to outside successively.There is the problem of label described in aforementioned patent in this clothes lining type label, affects sense comfortable and easy to wear equally.In addition; the reading performance of label is subject to the impact of marked dress materials dielectric properties difference; the label of above-mentioned patent states does not all provide concrete solution; and how to protect clothes its label after the mechanicals efforts such as washing that original reading effect still can be kept preferably also to there is certain defect, this just requires reasonably to design washing mark UHFRFID label.
The first-selection that UHFRFID label antenna is antenna printing both at home and abroad is at present printed by method for printing screen, its principle mainly utilizes the saturating ink of screen printing forme picture and text (RFID antenna pattern) part mesh, and the ultimate principle of non-graphic part mesh not strike through is printed.On screen printing forme one end, pour ink into during printing, applying certain pressure with scraping the ink position of scraper plate on screen printing forme, moving towards the screen printing forme other end simultaneously.Ink is expressed on stock from the mesh of areas by scraper plate in movement.In addition, there are some other selectable printing methods, as printing technologies such as letterpress, intaglio printing, inkjet printings, and traditional textile job operation, prepare the model of label antenna.By contrast, the production technology maturation of serigraphy prints labels antenna, good stability, precision are high, which ensure that the superperformance of RFID label antenna, can reduce power attenuation to a certain extent, thus obtain the label of best results, the requirement of producing in enormous quantities fast can be met.
Summary of the invention
Object of the present invention provides a kind of to wash mark for substrate, with the flexible UHFRFID label of textile garment perfect adaptation.
In order to achieve the above object, technical scheme of the present invention there is provided a kind of RFID label tag of the washing mark uhf band based on silk screen printing, it is characterized in that, its flexibility is not reduced when washing and mark increasing UHFRFID label function, manufacture method comprises: selecting and washing mark cloth is the substrate of printed antenna, then adopt the method for serigraphy to be printed on substrate by electrically conductive ink and form antenna, after drying by the connecting band of the RFID label chip of uhf band by conductivity type adhesive bond on antenna, finally coating protection is carried out to chip place, coating material adopts flexible resin.
Preferably, described electrically conductive ink adopts conductive silver ink.
Preferably, described antenna adopts dipole antenna, and the two ends load of dipole antenna is that hollow out is circular.
Preferably, after the oven dry of on-chip antenna will be printed on, with conductivity type cementing agent, the connecting band with chip be bonded on antenna, conservation treatment will be carried out to label chip place, and prevent chip impaired.
Preferably, be treated to described in: cover flexible coating at described label chip place.
Carry out in the product development and design of silk-screen printing technique, mainly printing on some rigid substrate, as art paper, sheet metal, plastic plate etc. at employing electrically conductive ink at present.Electrically conductive ink is printed on washing of fabric and puts on by the present invention, electrically conductive ink is originally as a kind of heterogeneous mix suspending system be made up of conductive phase powder granule, resin glue, solvent and related auxiliaries, possess good wettability and cohesiveness, and to wash mark cloth fabric itself be also multi-pore structure.In screen printing process, apply certain pressure to scraper plate ink is expressed to washes on mark cloth, thus ink is marked cloth and is combined closely with washing, enter in the hole washing mark cloth, this makes electrically conductive ink and washes the distance marking cloth greatly to reduce, when for a certain numerical value simultaneously, gravitational between them can be enhanced, solvent volatilization after solidification, intermolecular distance reduces again, and electrically conductive ink can be marked cloth and be firmly combined with washing.But fabric pore often causes printing-ink layer thickness uneven, finally affect the impedance of antenna and the reading effect of label everywhere.Certainly, we can process the surface washing mark cloth before printing.Such as, washing mark cloth surface coverage flexible coating, improving printing quality, making the thickness of printed antenna more even; Water-fast, solvent-resisting resin selected by electrically conductive ink cementing agent, thus improves the wash durability of label.
Wash mark cloth to be widely used and to be subject to consumer as the parts of clothes and accept, be combined dexterously with RFID using it as substrate, this and adopt compared with the RFID label tag sewed up of adhesive sticker, perfectly solve the problem that the sense of discomfort problem of adhesive sticker and skin contact in existing scheme or apparel appearance are deteriorated; Adopt the method printed antenna of serigraphy, improve the precision of RFID label tag, ensure that the good reading effect of invention label; Wash mark cloth quality soft, adopt the electrically conductive ink containing flexible cured resin, ensure that the bend resistance performance of invented UHFRFID label; Impedance matching aspect regulates by controlling the thickness of printed antenna, and the thickness of printed antenna is mainly determined jointly by silk-screen printing technique parameter and electrically conductive ink parameter.Silk-screen printing technique parameter aspect mainly contains the thickness that the factors such as half tone order number, blade pressure, scraper velocity affect printed antenna; The change of electrically conductive ink parameter aspect antenna thickness mainly ink viscosity causes.
For the selection of label antenna, with the comparatively ripe dipole antenna design proposal of existing UHFRFID label for primary election, then, revise according to conductive silver ink formula and printing technology on this basis, make the load at its two ends into hollow out circular, hollow out annulus has saved the use of electrically conductive ink on the one hand, expand the frequency range of antenna on the other hand, thus obtain the broadband UHFRFID label antenna that we need to obtain, and then reply label reads the narrow awkward situation of frequency range under different dielectric environment, this design can effectively make the frequency range of antenna expand, even if at the surrounding materials that specific inductive capacity is larger, still can ensure that our reading frequency range covers UHF standard frequency range completely, as 902MHz-928MHz.This setting makes UHFRFID label can adapt to the clothes of various fabric, expands range of applicability.
Washing mark provides great feasibility to label in the present invention, and say from material, it is a part for clothes, act as again the substrate printing UHFRFID label; From printing feasibility, traditional mark content of washing is generally adopt serigraphy to print to form, visible mark material of washing is applicable to serigraphy, meanwhile, serigraphy has numerous advantage in printing radio circuit direction, also illustrate that and uses screen process press electrically conductive ink to be printed on the feasibility of washing and putting on.Thickness is obtained evenly and the antenna of precision by controlling the parameter such as scraper velocity, blade pressure, half tone order number in screen printing process, here precision mainly refers to once determine thickness, make impedance and the chip perfect matching of antenna, thus reduce reflection coefficient of power.
Here the characteristic index of UHFRFID mainly contains two: minimum power and reading distance.The power of minimum power chip for activating, makes signal transmission to read write line; Read distance for label is to the ultimate range (under not having the interference of environment and external impact) of reading and writing device antenna.Minimum power generally characterizes with its reflection coefficient of power, in order to obtain maximum power delivery, be necessary to allow antenna impedance and chip impedance matched well, therefore the present invention must allow reflection coefficient of power enough little, thus also makes the power of chip for activating reach minimum.
In formula (1), f is frequency, and Γ (f) is reflection coefficient of power, Z
cf () represents the impedance of chip, Z
aillustrate the impedance of antenna, about the test read write line reading distance aspect can read the ultimate range of label.
After chip coating protection loaded onto by the antenna produced, can use in clothes.Certainly, the label of making must possess the performance of clothes, as some bendings, is washing the stability under mechanicals efforts.Bonding effect after the antenna drying printed by serigraphy on washing mark is firm; tag substrate quality is soft; all considerable influence can not be had to the performance of label under general large deformation; and antenna and chip are mainly positioned at and wash mark inner side (washing character pattern content is printed in outside); this well prevents UHFRFID label to be worn and torn; washing aspect bonds firmly owing to drying rear ink and washing to mark; emphasis also has resinous coat protect IC region, therefore can meet washing to a certain degree or conventional washing standard.
Compared with prior art, the invention has the beneficial effects as follows: (I) label retains washing mark flexibility, with clothes perfect adaptation, does not affect outward appearance and the comfortableness of clothes; (II) label antenna is all channel antenna, makes label greatly reduced by the impact of proximity object and material; (III) antenna substrate is washing mark starting material, gives the pliability that UHFRFID antenna is certain, can bear certain bending or distortion; (IV) label construction is simple, convenient making; (V) label is printed by screen process press, can realize producing in enormous quantities, is applicable to promoting.
Accompanying drawing explanation
Fig. 1 is a kind of basic structural representation of plane of conventional UHFRFID label;
Fig. 2 is the basic structural representation of plane of the UHFRFID label after improving;
Fig. 3 frequency and input reflection coefficient graph of a relation;
Fig. 4 frequency and input impedance graph of a relation;
Fig. 5 commonly uses UHFRFID label surrounding electric field strength simulation result figure;
Fig. 6 improves rear UHFRFID label surrounding electric field strength simulation result figure.
Embodiment
Below in conjunction with accompanying drawing and concrete embodiment, the present invention is described in further detail.Should be understood that these examples are only not used in for illustration of the present invention to limit the scope of the invention.After the content of having read the present invention's instruction, those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values fall within the application's appended claims limited range equally.
As shown in Figure 1, 2, illustrate the planar structure of two kinds of UHFRFID label antennas in figure, the first is conventional UHFRFID antenna; The second slightly makes improvements on the basis of the first antenna.The length and width such as two kinds of antennas, are 100 × 20mm
2, owing to considering that silk screen printing is put on washing, the antenna that this size is little has more practicality.Port distance D is 2mm, and improving antenna ends load is hollow out circular ring structure, and exradius R1 is 10mm, and roundlet radius R 2 is 9mm.Due to for antenna ends load, electric current is mainly distributed in its edge, and therefore, this kind of design possesses the effect of saving electrically conductive ink.From figure, we can also see that antenna port has a connecting band, connecting band are fixed IC chip, thus form complete RFID label tag.A kind of embodiment of the present invention is: by antenna pattern above-mentioned, is drawn on screen process press half tone, and its principle mainly utilizes the saturating ink of screen printing forme areas mesh, and the ultimate principle of non-graphic part mesh not strike through is printed; With the electrically conductive ink control antenna electrical impedance characteristics of certain proportioning.Bearing ink pad below half tone is completed the washing mark starting material prepared, then on half tone, a certain amount of electrically conductive ink is gone up, then apply certain pressure to scraper plate ink is scraped from left to right, thus the ink on half tone is printed on the washing mark material on bearing ink pad, complete the printing of antenna; Subsequently, the antenna produced is put into drying box, electrically conductive ink is solidificated on washing mark; Finally adopt conductive epoxy resin bonding, fixing RFID chip in connecting band place, complete the making of label.
In theory, the tag performance of example of the present invention as shown in figures 3 to 6.As can be seen from Figure, UHFRFID label impedance after improvement reduces, and the antenna tag impedance variation after improving in UHF (902MHz-928MHz) frequency range is less than previous label, this means when impedance variation scope is identical, the label impedance frequency range after improvement will obviously increase; Meanwhile we can find that relevant label surrounding electric field intensity and input reflection coefficient have almost no change before and after improving.Certainly, for the conductive silver paste material that experiment adopts, we also can adopt copper slurry, aluminium paste etc., and it is little on the impact of final experiment effect.
Claims (3)
1. the RFID label tag based on the washing mark uhf band of silk screen printing; it is characterized in that; washing mark flexibility is retained when realizing UHFRFID label function; manufacture method comprises: selecting and washing mark cloth is the substrate of printed antenna; then adopt the method for serigraphy to be printed on substrate by electrically conductive ink and form antenna; after drying by the connecting band of the RFID label chip of uhf band by conductivity type adhesive bond on antenna; finally carry out coating protection to chip place, coating material adopts flexible resin.
2. the RFID label tag of a kind of washing mark uhf band based on silk screen printing as claimed in claim 1, is characterized in that, described electrically conductive ink adopts conductive silver ink.
3. the RFID label tag of a kind of washing mark uhf band based on silk screen printing as claimed in claim 1, is characterized in that, described antenna adopts dipole antenna, and the two ends load of dipole antenna is that hollow out is circular.
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| CN201510717776.XA CN105260765B (en) | 2015-10-29 | 2015-10-29 | Silk screen printing-based RFID tag of water-washing label UHF frequency band |
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| CN201510717776.XA CN105260765B (en) | 2015-10-29 | 2015-10-29 | Silk screen printing-based RFID tag of water-washing label UHF frequency band |
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| WO2018072108A1 (en) * | 2016-10-19 | 2018-04-26 | 温州沸鼎智能科技有限公司 | Rfid radio frequency tag invalidated after being washed with water, and method for using same |
| CN108539375A (en) * | 2018-03-30 | 2018-09-14 | 东华大学 | A kind of fabric base super high frequency radio frequency identification antenna and manufacturing method |
| CN108565550A (en) * | 2018-03-29 | 2018-09-21 | 东华大学 | A kind of hollow type dipole antenna and fabric base UHF RFID tags |
| CN108736151A (en) * | 2018-04-11 | 2018-11-02 | 安徽工程大学 | A kind of flexible antennas and its patch preparation method |
| CN108832286A (en) * | 2018-06-19 | 2018-11-16 | 北京宏诚创新科技有限公司 | A kind of bending label antenna worn applied to human body |
| CN108948867A (en) * | 2018-08-17 | 2018-12-07 | 东华大学 | A kind of UV electrically conductive ink and its preparation method and application of suitable fabric silk-screen |
| CN109193142A (en) * | 2018-09-03 | 2019-01-11 | 北京理工大学 | A kind of processing method of wearable antenna |
| CN109677148A (en) * | 2019-01-23 | 2019-04-26 | 西安理工大学 | A kind of printing method of flexibility RFID reader antenna |
| CN110175667A (en) * | 2019-06-03 | 2019-08-27 | 北京宏诚创新科技有限公司 | A kind of RF tag for liquid biochemical material management |
| CN111582419A (en) * | 2020-04-29 | 2020-08-25 | 元彰精密科技(扬州)有限公司 | Manufacturing method of cloth-based electronic tag |
| CN111860736A (en) * | 2019-04-30 | 2020-10-30 | 北京梦之墨科技有限公司 | Fabric label and manufacturing method thereof |
| CN112801257A (en) * | 2021-01-29 | 2021-05-14 | 南方科技大学 | RFID electronic tag and manufacturing method and system thereof |
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| CN111582419A (en) * | 2020-04-29 | 2020-08-25 | 元彰精密科技(扬州)有限公司 | Manufacturing method of cloth-based electronic tag |
| CN112801257A (en) * | 2021-01-29 | 2021-05-14 | 南方科技大学 | RFID electronic tag and manufacturing method and system thereof |
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