CN117438773A - RFID antenna and preparation method thereof - Google Patents
RFID antenna and preparation method thereof Download PDFInfo
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- CN117438773A CN117438773A CN202311489170.6A CN202311489170A CN117438773A CN 117438773 A CN117438773 A CN 117438773A CN 202311489170 A CN202311489170 A CN 202311489170A CN 117438773 A CN117438773 A CN 117438773A
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- 239000003292 glue Substances 0.000 claims abstract description 175
- 229910052751 metal Inorganic materials 0.000 claims abstract description 135
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- 239000011888 foil Substances 0.000 claims abstract description 132
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- 238000005286 illumination Methods 0.000 claims abstract description 5
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
- H01Q1/2225—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/08—Means for collapsing antennas or parts thereof
- H01Q1/085—Flexible aerials; Whip aerials with a resilient base
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- Details Of Aerials (AREA)
Abstract
The invention relates to the technical field of electronic radio frequency identification, in particular to an RFID antenna and a preparation method thereof, wherein the RFID antenna comprises a printable surface material layer, a glue layer and an antenna layer; the glue layer is positioned between the printable surface material layer and the antenna layer, and the antenna layer is bonded with the printable surface material layer through the glue layer; the printable surface material layer is made of thermal paper; the antenna layer is made of metal foil, and is formed by cutting the metal foil through die cutting and/or laser cutting; the glue layer is made of UV glue, and is cured in an ultraviolet illumination mode. The RFID antenna adopts a mode of 'carrying film and local gluing' in the preparation process, so that when the carrying film is torn off, waste discharge and antenna transfer can be realized simultaneously.
Description
Technical Field
The invention relates to the technical field of electronic radio frequency identification, and particularly provides an RFID antenna and a preparation method thereof.
Background
The radio frequency identification technology (Radio Frequency Identification, RFID), which is an automatic identification technology in the field of wireless communication, utilizes electromagnetic waves (radio frequency) which can be used for wireless communication to perform non-contact bidirectional data communication, thereby achieving the purposes of identification target and data exchange. The working process is as follows: specific targets are identified by radio waves in combination with electromagnetic induction techniques and are in contactless communication with them. At present, the RFID technology is widely applied in a plurality of fields such as identity recognition, retail management, warehouse management, logistics management, transportation, production and manufacturing and the like.
With the continuous development of the RFID technology of the Internet of things, people put forward higher requirements on the performance consistency, the reliability and the application range of the RFID electronic tag, and the antenna is an important component part in the RFID electronic tag, so that the improvement of structural design, material selection and production process of the RFID antenna becomes a main technical break of the development of the current RFID electronic tag.
At present, most of RFID antenna finished products in the market comprise a metal coil and a substrate, wherein the metal coil and the substrate are covered together through glue, the conventional RFID antenna structure comprises the substrate, and due to the limitation of a production process, materials which can be selected for the substrate are usually PET (polyethylene terephthalate) polyester films, PVC (polyvinyl chloride) films, PI (polyimide) films, polyamide films and the like, and the materials cannot be automatically degraded in the nature, so that the RFID antenna is not environment-friendly. The substrate is used as an auxiliary processing structure and can be attached and produced together by the metal antenna, so that in the subsequent finished RFID electronic tag product, the substrate is permanently kept inside, and the thickness of the finished RFID electronic tag product is increased and the flexibility is poor. In addition, the finished product of the conventional RFID antenna often only comprises a metal coil and a base material, the RFID antenna is further put into production to be manufactured into an RFID electronic tag of an application level, and the procedures of chip bonding, coating and closing release paper, coating and closing a printable surface material and the like are needed, so that the production process flow of the second half section of the RFID electronic tag is complicated, the procedures are not reasonably distributed, and the production pressure is easy to cause.
Disclosure of Invention
The invention aims to solve the problems, and provides the RFID antenna and the preparation method thereof, which omits a substrate structure, reduces the pollution to the environment, and ensures that the RFID antenna is lighter, thinner, better in flexibility and more flexible.
In order to achieve the above object, an embodiment of the present invention provides an RFID antenna, which includes a printable facestock layer, a glue layer, and an antenna layer; the glue layer is positioned between the printable surface material layer and the antenna layer, and the antenna layer is bonded with the printable surface material layer through the glue layer;
the printable surface material layer is made of thermal paper; the antenna layer is made of metal foil, and is formed by cutting the metal foil through die cutting and/or laser cutting; the glue layer is made of UV glue, and is cured in a mode of ultraviolet illumination.
As a further improvement of an embodiment of the present invention, the projected pattern of the antenna layer in the horizontal plane direction is identical in shape to the projected pattern of the glue layer in the horizontal plane direction;
the projection pattern of the antenna layer in the horizontal plane direction is the same as the projection pattern of the glue layer in the horizontal plane direction in size; alternatively, the size of the projected pattern of the antenna layer in the horizontal plane direction is larger than the size of the projected pattern of the glue layer in the horizontal plane direction.
As a further improvement of an embodiment of the present invention, a size of the projected pattern of the antenna layer in the horizontal plane direction is larger than a size of the projected pattern of the glue layer in the horizontal plane direction; the edge of the outer contour of the projected pattern of the glue layer in the horizontal direction is no more than 0.2mm from the edge of the outer contour of the projected pattern of the antenna layer in the horizontal direction.
To achieve the above object, an embodiment of the present invention provides a method for manufacturing an RFID antenna, where the method includes:
s1, providing a metal foil and a bearing film, and bonding and adhering one side surface of the metal foil and one side surface of the bearing film;
s2, coating glue on one side surface of the metal foil, which is far away from the bearing film, according to a preset antenna pattern;
s3, cutting the metal foil along an outline path of the preset antenna pattern;
s4, providing a printable surface material layer made of thermal paper, and bonding one side surface of the printable surface material layer and one side surface of the metal foil coated with glue;
s5, stripping the bearing film from the metal foil, and simultaneously taking away the part of the metal foil which is not coated with glue and cut, wherein the rest part of the metal foil and the printable surface material layer form an RFID antenna finished product.
As a further improvement of an embodiment of the present invention, the step S1 specifically includes: the carrier film is a self-adhesive film of plastic material and has at least one side thereof which is adhesive, and one side thereof which is adhesive is bonded to either side of the metal foil and forms an adhesive bond.
As a further improvement of an embodiment of the present invention, the step S2 specifically includes: providing a printing plate, wherein the printing plate is provided with a groove with a preset antenna pattern, the glue is placed in the groove, the printing plate is in pressure connection with one side surface of the metal foil, and the glue is coated on one side surface of the metal foil in a gravure printing mode.
As a further improvement of an embodiment of the present invention, the step S3 specifically includes: the metal foil adopts a die cutting and cutting processing mode;
or the metal foil adopts a laser cutting processing mode;
or the metal foil adopts a die cutting and laser cutting processing mode at the same time.
As a further improvement of an embodiment of the present invention, the steps S2, S3, S4 specifically include: the glue coated on the metal foil is UV glue, and after the glue is coated on one side surface of the metal foil according to a preset antenna pattern, the glue is pre-cured through ultraviolet illumination, so that the glue reaches a semi-cured state;
cutting the metal foil along the glue edge in a semi-cured state coated by a preset antenna pattern;
laminating a side of the printable facestock layer to a side of the metal foil coated with the glue and creating a pressure between the printable facestock layer and the metal foil;
the glue is located between the printable facestock layer and the metal foil, the glue is transformed from a semi-cured state to a fully cured state under pressure, and the printable facestock layer forms a bond with the metal foil.
As a further improvement of an embodiment of the present invention, the step S5 specifically includes: the peel force between the carrier film and the metal foil is less than the peel force between the printable facestock layer and the metal foil.
As a further improvement of an embodiment of the invention, the gravure printing and gluing are carried out by using a glue printing device, the glue printing device comprises a glue tank for storing glue, a glue applying roller, a scraper and a press roller, the metal foil is positioned between the press roller and the glue applying roller, the surface of the press roller is in a smooth state, the surface of the glue applying roller is carved with a gravure pattern identical with a preset antenna pattern, a part of the glue applying roller is arranged in the glue tank and rotates along with the glue applying roller to carry out automatic gluing, the glue applying roller axially contacts with the scraper in a rolling way, and after the glue applying roller is used for applying glue, the scraper scrapes off the glue except the inside of the gravure pattern on the surface of the glue applying roller, and then the glue is coated on the metal foil by mutual extrusion of the press roller and the glue applying roller.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the carrier film is used for carrying out antenna cutting and waste discharging, and the printable surface material layer is directly used as a substrate for carrying out metal antenna gluing, so that the necessary substrate structure of the traditional RFID antenna is omitted, the production cost is greatly reduced, the pollution of the substrate structure to the environment is avoided, and in addition, the RFID antenna provided by the invention is provided with the printable surface material layer, and the subsequent RFID electronic tag preparation process is saved. In addition, the printable surface material layer of the RFID antenna is made of a thermosensitive paper material, so that the RFID electronic tag technology can be directly applied to the manufacturing of electronic surface sheets in the logistics industry, and the application field of RFID electronic tags is developed.
Drawings
FIG. 1 is a schematic diagram of an exploded structure of an RFID antenna in an embodiment of the present invention;
FIG. 2 is a schematic side view of an RFID antenna according to an embodiment of the present invention;
FIG. 3 is an enlarged schematic view of a portion A of FIG. 2;
FIG. 4 is a schematic flow chart of a method for manufacturing an RFID antenna according to an embodiment of the invention;
FIG. 5 is a schematic diagram of a production facility for RFID antennas in accordance with one embodiment of the present invention;
fig. 6 is a schematic structural view of the glue printing apparatus of fig. 4.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the invention and structural, methodological, or functional modifications of these embodiments that may be made by one of ordinary skill in the art are included within the scope of the invention.
With reference to fig. 1 and 2, the rfid antenna comprises a printable facestock layer 1, a glue layer 2, and an antenna layer 3, the glue layer 2 being located between the printable facestock layer 1 and the antenna layer 3, the antenna layer 3 forming a bond with the printable facestock layer 1 through the glue layer 2. Wherein at least one side of the printable facestock layer 1 is a printable side, the printable facestock layer 1 needs to be easily compatible with different types of printing techniques (e.g., thermal transfer, thermal printing, inkjet printing, etc.) to ensure that clear, durable images and text are printed, the printed side of the printable facestock layer 1 being used to show information of the RFID antenna. The RFID antenna with the printable surface material structure can omit the process of attaching the printable surface material when being applied to the preparation of the RFID electronic tag, and reduce the process production pressure for the preparation of the RFID electronic tag.
In one embodiment, the material of the printable facestock layer 1 is thermal paper. Because the material used by the traditional express delivery flow surface sheet is a thermal paper material, in the embodiment, the thermal paper material is adopted as the outermost information display structure of the RFID antenna, so that the RFID antenna can be directly adapted to the manufacture of RFID electronic tags in the field of express delivery flow surface sheets.
In this embodiment, the antenna layer 3 is formed from a metal foil by die cutting and/or laser cutting. Specifically, the metal foil is processed into a specific shape by a die cutting method to form the antenna layer 3, or the metal foil is processed into a specific shape by a laser cutting method to form the antenna layer 3, or the metal foil is firstly rough processed by a die cutting method and then fine processed by a laser cutting method to finally form the antenna layer 3 with a specific shape, and the metal foil can be a metal material with good conductivity such as aluminum foil or copper foil. The antenna layer 3 is made by cutting metal foil, so that compared with the traditional etching and printing process, the antenna layer 3 is lower in manufacturing cost, free of harmful substances and environment-friendly. And because the material of printable plane material layer 1 is thermal paper, lead to printable plane material layer 1 to be comparatively sensitive to the temperature, glue layer 2 adopts the UV to glue and carries out the solidification through ultraviolet irradiation's mode, makes whole solidification process go on under the condition of relative low temperature like this to avoid causing influence or interference to the pattern information on printable plane material layer 1 surface.
In this embodiment, the material of the glue layer 2 is UV glue, and the glue layer 2 is cured by means of ultraviolet light, so that the antenna layer 3 and the printable facestock layer 1 are bonded. It should be noted here that when the antenna layer 3 is adhered to the printable facestock layer 1, the printable facestock layer 1 is used as a substrate, and the non-printing surface of the printable facestock layer 1 faces upward to fix the antenna layer 3 to the printable facestock layer 1 by photo-curing, so that the printable facestock layer 1 plays a supporting role during the adhesion process, similar to the substrate structure in the conventional process.
In one embodiment, the projected pattern of the antenna layer 3 in the horizontal direction is identical in shape to the projected pattern of the glue layer 2 in the horizontal direction, in other words, the antenna layer 3 and the glue layer 2 have the same shaped outer profile. In addition, the projected pattern of the antenna layer 3 in the horizontal direction is the same as the projected pattern of the glue layer 2 in the horizontal direction in size, or the projected pattern of the antenna layer 3 in the horizontal direction is larger than the projected pattern of the glue layer 2 in the horizontal direction in size, and it should be noted here that the antenna layer 3 and the glue layer 2 have the same outer contour but the sizes thereof are not necessarily the same. In an embodiment, the projected pattern of the antenna layer 3 may be an equal-scale enlarged version of the projected pattern of the glue layer 2, in which case the projected pattern of the antenna layer 3 in the horizontal direction will cover the projected pattern of the glue layer 2 in the horizontal direction. Of course, in another embodiment, the projected pattern of the antenna layer 3 and the projected pattern of the glue layer 2 may be identical in shape and size at the same time, and at this time, the projected pattern of the antenna layer 3 in the horizontal plane direction and the projected pattern of the glue layer 2 in the horizontal plane direction precisely coincide.
In combination with fig. 2 and 3, in one embodiment, when the size of the projected pattern of the antenna layer 3 in the horizontal direction is larger than the size of the projected pattern of the glue layer 2 in the horizontal direction, the distance between the outer contour edge of the glue layer 2 and the outer contour edge of the antenna layer 3 is not more than 0.2mm. It should be noted that, the outer contour of the antenna layer 3 is slightly larger than the outer contour dimension of the glue layer 2, which is favorable for the glue overflow phenomenon after the solidification of the glue layer 2, and the outer contour dimension difference is limited within the range of 0.2mm of the edge distance, which is favorable for ensuring the bonding strength provided by the glue layer 2 and avoiding the defects of edge warping and the like of the antenna layer 3 after bonding.
Referring to fig. 4, a method for manufacturing an RFID antenna includes:
s1, coating a bearing film with a metal foil: providing a metal foil and a bearing film, and bonding one side surface of the metal foil and one side surface of the bearing film;
s2, locally gluing the metal foil: coating glue on one side surface of the metal foil, which is far away from the carrier film, according to a preset antenna pattern;
s3, cutting the metal foil: cutting the metal foil along a perimeter path of a preset antenna pattern;
s4, a metal foil covered surface material: providing a printable surface material layer made of thermal paper, and bonding one side surface of the printable surface material layer and one side surface of the metal foil coated with glue;
s5, forming an antenna by using the metal foil: and stripping the carrier film from the metal foil, taking away the part of the metal foil which is not coated with glue and cut, and forming the RFID antenna finished product by the rest part of the metal foil and the printable surface material layer.
Specifically, in step S1, raw materials such as a metal foil and a carrier film are provided, wherein the metal foil may be an aluminum foil or a copper foil, the carrier film is a plastic film, the metal foil and the carrier film are bonded together, and the bonding and bonding process is also called lamination. The specific lamination mode can be to coat glue on the surface of the metal foil facing the bearing film or the surface of the bearing film facing the metal foil, or coat glue on the surfaces of the metal foil and the bearing film facing each other, and finally make the metal foil and the bearing film adhere to each other. In one embodiment, the carrier film is a self-adhesive film made of plastic and having at least one adhesive side, the adhesive side of the carrier film and the metal foil is self-adhesive, the adhesive is 5-10 g, and the adhesive side of the carrier film and the metal foil are adhered and bonded.
Specifically, in step S2, the metal foil is already coated with the carrier film, and at this time, glue is coated on the other surface of the metal foil, which is not coated with the carrier film, according to a preset antenna pattern, and the glue coating process and the glue coating amount are performed according to the conventional process. It should be understood that the preset antenna pattern herein is a projected pattern of the antenna to be subsequently formed in the horizontal plane direction, that is, the glue needs to be applied according to the shape of the antenna, and the size of the glue application shape is smaller than or equal to the size of the antenna shape. In one embodiment, the glue is applied to the surface of the metal foil using a gravure printing process. Specifically, a printing plate is provided, a groove matched with a preset antenna pattern is formed in the printing plate, glue is placed in the groove, the printing plate is in pressure connection with one side surface of the metal foil, which is far away from the bearing film, and the glue is coated on the surface of the metal foil in a gravure printing mode.
Specifically, in the step S3, the metal foil is mainly processed by die cutting and/or laser cutting. In one embodiment, the metal foil is cut by a die cutter according to a predetermined feeding procedure to form a circuit of a predetermined antenna pattern. In another embodiment, the metal foil is cut by a laser according to a predetermined path procedure to trace a predetermined antenna pattern. In yet another embodiment, the metal foil is cut into the approximate line of the predetermined antenna pattern by utilizing the high-efficiency cutting characteristic of the die-cutting knife, and the cut approximate line is refined and corrected by utilizing the high-precision cutting characteristic of the laser.
Specifically, in step S4, a printable surface material layer made of thermal paper is provided, the printable surface material layer and the metal foil are covered, in the covering process, only a glue-coated part on the metal foil and a part of the metal foil, which is cut and left with a specific antenna pattern, are substantially glued with the printable surface material layer, and the gluing strength of the process is greater than the gluing strength of the carrier film and the metal foil, so that the subsequent carrier film can be smoothly peeled off to take away the remaining part of the metal foil. The printable facestock layer is used as a substrate for the bonding process, which in effect provides support for the substrate structure in conventional RFID antennas, while in this embodiment a similar effect is achieved by the printable facestock layer.
Specifically, in step S5, the carrier film is peeled from the metal foil, and the metal foil which is not glued and is cut is carried away, and the waste is discharged from the metal foil, so that not only is the waste of the metal foil discharged, but also the waste of the carrier film is discharged, which can be regarded as that the substrate structure is removed in the conventional RFID antenna process, but the substrate structure cannot be removed in the conventional process, or the removal cost is extremely high. In one embodiment, the peel force between the carrier film and the metal foil is less than the peel force between the printable facestock layer and the metal foil, which ensures that the carrier film, during the peeling process, takes away the metal foil that is not glued and that has been cut into antenna portions and does not take away the metal foil that has been cut into antenna portions, at which time the metal foil that remains after cutting, i.e. the antenna layer, forms the finished RFID antenna with the printable facestock layer.
In addition, in one embodiment, in order to reduce the influence of glue curing on the printable surface material layer of the thermal paper material in the laminating process, the glue coated on the metal foil is UV glue, and after the glue is coated on one side surface of the metal foil according to a preset antenna pattern, the glue is pre-cured by ultraviolet irradiation, so that the glue reaches a semi-cured state. It should be understood that the glue in the semi-cured state will not scatter due to gravity or the like, and there is room for further curing. Cutting the metal foil along the semi-cured glue edge coated by the preset antenna pattern, attaching one side of the printable surface material layer to one side of the metal foil coated by the glue, and forming pressure between the printable surface material layer and the metal foil, wherein the pressure is used for further curing the UV glue under the condition of being pressed, and one of the metal foil and the printable surface material layer can be pressed, or both can be pressed simultaneously. The glue is located between the printable facestock layer and the metal foil, the glue is transformed from a semi-cured state to a fully cured state under pressure, and the printable facestock layer forms a bond with the metal foil.
With reference to fig. 5, for the above preparation process, the embodiment of the invention also provides a production device of the RFID antenna, and the preparation process of the RFID antenna is completely implemented on the device. The production equipment of the RFID antenna mainly comprises a first unreeling device 4, a second unreeling device 5, a glue printing device 8, a cutting device 10 and an antenna transferring device 11. The first unreeling device 4 is reeled with a composite body formed by covering a bearing film with a metal foil, the first unreeling device 4 is driven to rotate by a motor, the composite body of the metal foil and the bearing film moves along the rotating direction of the first unreeling device 4, and the composite body of the metal foil and the bearing film is transmitted to the glue printing device 8 through the tensioning wheel 13 and the guide wheel 12.
Referring to fig. 6, the glue printing device 8 is used for coating glue on a metal foil in a gravure printing glue coating manner, the glue printing device 8 comprises a glue box 81 for storing glue, a glue applying roller 82, a scraper 83 and a pressing roller 84, a composite of the metal foil and a carrier film is positioned between the pressing roller 84 and the glue applying roller 83, the pressing roller 84 and the glue applying roller 83 rotate relatively along respective axes, one side of the metal foil of the composite of the metal foil and the carrier film is contacted with the glue applying roller 83, the surface of the pressing roller 84 is in a smooth state, no pit exists, the pressing roller 84 is made of polyurethane, the hardness is between 75HA and 85HA, and the width of the pressing roller 84 is 20-30 mm longer than the width of the composite of the metal foil and the carrier film; the surface of the glue applying roller 82 is engraved with intaglio patterns identical to the preset antenna patterns, the intaglio patterns on the glue applying roller 82 are composed of tiny net holes, usually electric engraving, and the mesh number is 160 meshes, usually between 100 and 200 meshes; part of the glue applying roller 82 is placed in the glue tank 81, automatic glue applying is carried out along with the rotation of the glue applying roller 82, the glue applying roller 82 is in rolling contact with the scraper 83 along the axial direction, after the glue applying roller 82 is used for applying glue, the scraper 83 scrapes off the glue except for the inside of intaglio patterns on the surface of the glue applying roller 82, and the glue is coated on the metal foil through the mutual extrusion of the press roller 84 and the glue applying roller 82.
After the metal foil is coated with the glue, the glue is transmitted to a glue curing device 9, the glue curing device 9 mainly uses an ultraviolet irradiation lamp as a core device, ultraviolet rays are irradiated on one side of the coated glue to pre-cure the glue, and a photoinitiator (or photosensitizer) in the UV glue absorbs ultraviolet rays under the irradiation of the ultraviolet rays to generate active free radicals or cations so as to initiate monomer polymerization, crosslinking and branching chemical reaction, so that the glue is converted from a liquid state to a semisolid in a few seconds.
After the glue is pre-cured, the glue is transmitted to the cutting device 10, and the die cutting rule of the cutting device 10 cuts the metal foil according to the preset antenna pattern, so that the integrity of the bearing film is ensured not to be damaged by cutting in the cutting process.
After die cutting, the complex of the metal foil and the carrier film enters an antenna transfer device 11, in addition, a second unreeling device 5 coiled with a printable surface material layer 1 is arranged above the antenna transfer device 11, the printable surface material layer 1 enters the antenna transfer device 11 after passing through a tensioning wheel 13, the antenna transfer device 11 covers the complex of the metal foil and the carrier film and the printable surface material layer 1 together through two rotating rollers, only the gluing part and the part of the metal foil, which is reserved with a specific antenna pattern after cutting, namely the antenna layer 3 in the laminating process realize substantial gluing, after being output by the antenna transfer device 11, the printable surface material layer 1 is coiled into a finished product coiling device 6 through a guide wheel 12, the part of the RFID antenna of an instant finished product is coiled into a waste coiling device 7 through the guide wheel 12, and the rest of the metal foil and the carrier film is guided into a waste coiling device 7 through the guide wheel 12, so that waste collection is realized. The device realizes the processing and preparation of the RFID antenna, and greatly improves the processing efficiency.
While embodiments of the present invention have been illustrated and described above, it will be appreciated that the above described embodiments are illustrative and should not be construed as limiting the invention. Variations, modifications, alternatives and variations of the above-described embodiments may be made by those of ordinary skill in the art within the scope of the present invention.
The above embodiments of the present invention do not limit the scope of the present invention. Any other corresponding changes and modifications made in accordance with the technical idea of the present invention shall be included in the scope of the claims of the present invention.
Claims (10)
1. An RFID antenna comprising a printable facestock layer, a glue layer, and an antenna layer; the glue layer is positioned between the printable surface material layer and the antenna layer, and the antenna layer is bonded with the printable surface material layer through the glue layer;
the printable surface material layer is made of thermal paper; the antenna layer is made of metal foil, and is formed by cutting the metal foil through die cutting and/or laser cutting; the glue layer is made of UV glue, and is cured in a mode of ultraviolet illumination.
2. The RFID antenna of claim 1, wherein the projected pattern of the antenna layer in the horizontal direction is identical in shape to the projected pattern of the glue layer in the horizontal direction;
the projection pattern of the antenna layer in the horizontal plane direction is the same as the projection pattern of the glue layer in the horizontal plane direction in size; alternatively, the size of the projected pattern of the antenna layer in the horizontal plane direction is larger than the size of the projected pattern of the glue layer in the horizontal plane direction.
3. The RFID antenna of claim 2, wherein a size of the projected pattern of the antenna layer in the horizontal direction is greater than a size of the projected pattern of the glue layer in the horizontal direction; the edge of the outer contour of the projected pattern of the glue layer in the horizontal direction is no more than 0.2mm from the edge of the outer contour of the projected pattern of the antenna layer in the horizontal direction.
4. A method of manufacturing an RFID antenna, comprising the steps of:
s1, providing a metal foil and a bearing film, and bonding and adhering one side surface of the metal foil and one side surface of the bearing film;
s2, coating glue on one side surface of the metal foil, which is far away from the bearing film, according to a preset antenna pattern;
s3, cutting the metal foil along an outline path of the preset antenna pattern;
s4, providing a printable surface material layer made of thermal paper, and bonding one side surface of the printable surface material layer and one side surface of the metal foil coated with glue;
s5, stripping the bearing film from the metal foil, and simultaneously taking away the part of the metal foil which is not coated with glue and cut, wherein the rest part of the metal foil and the printable surface material layer form an RFID antenna finished product.
5. The method for manufacturing an RFID antenna according to claim 4, wherein the step S1 specifically includes:
the carrier film is a self-adhesive film of plastic material and has at least one side thereof which is adhesive, and one side thereof which is adhesive is bonded to either side of the metal foil and forms an adhesive bond.
6. The method for manufacturing an RFID antenna according to claim 4, wherein the step S2 specifically includes:
providing a printing plate, wherein the printing plate is provided with a groove with a preset antenna pattern, the glue is placed in the groove, the printing plate is in pressure connection with one side surface of the metal foil, and the glue is coated on one side surface of the metal foil in a gravure printing mode.
7. The method for manufacturing an RFID antenna according to claim 4, wherein the step S3 specifically includes:
the metal foil adopts a die cutting and cutting processing mode;
or the metal foil adopts a laser cutting processing mode;
or the metal foil adopts a die cutting and laser cutting processing mode at the same time.
8. The method for manufacturing an RFID antenna according to claim 4, wherein the steps S2, S3, S4 specifically include:
the glue coated on the metal foil is UV glue, and after the glue is coated on one side surface of the metal foil according to a preset antenna pattern, the glue is pre-cured through ultraviolet illumination, so that the glue reaches a semi-cured state;
cutting the metal foil along the glue edge in a semi-cured state coated by a preset antenna pattern;
laminating a side of the printable facestock layer to a side of the metal foil coated with the glue and creating a pressure between the printable facestock layer and the metal foil;
the glue is located between the printable facestock layer and the metal foil, the glue is transformed from a semi-cured state to a fully cured state under pressure, and the printable facestock layer forms a bond with the metal foil.
9. The method for manufacturing an RFID antenna according to claim 4, wherein the step S5 specifically includes:
the peel force between the carrier film and the metal foil is less than the peel force between the printable facestock layer and the metal foil.
10. The method of manufacturing an RFID antenna according to claim 6, wherein gravure printing and glue application are performed by using a glue printing device, the glue printing device comprises a glue tank for storing glue, a glue applying roller, a scraper and a pressing roller, the metal foil is positioned between the pressing roller and the glue applying roller, the surface of the pressing roller is in a smooth state, the surface of the glue applying roller is engraved with a gravure pattern identical to a preset antenna pattern, a part of the glue applying roller is placed in the glue tank, automatic glue application is performed along with rotation of the glue applying roller, the glue applying roller is in rolling contact with the scraper along the axial direction, after the glue applying roller applies glue, the scraper scrapes off the glue on the surface of the glue applying roller except the inside of the gravure pattern, and the glue is coated on the metal foil by mutual extrusion of the pressing roller and the glue applying roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311489170.6A CN117438773A (en) | 2023-11-09 | 2023-11-09 | RFID antenna and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311489170.6A CN117438773A (en) | 2023-11-09 | 2023-11-09 | RFID antenna and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117438773A true CN117438773A (en) | 2024-01-23 |
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ID=89549637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311489170.6A Pending CN117438773A (en) | 2023-11-09 | 2023-11-09 | RFID antenna and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117438773A (en) |
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2023
- 2023-11-09 CN CN202311489170.6A patent/CN117438773A/en active Pending
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