A radio frequency tag and a manufacturing method thereof

Abstract

This application relates to the field of corrugated antenna tags, and particularly to a radio frequency tag and a manufacturing method thereof, comprising the following steps: attaching a corrugated antenna by pasting the corrugated antenna onto the label surface layer on one side coated with an adhesive layer; attaching a micro radio frequency sensor by pasting the micro radio frequency sensor onto a designated position on the label surface layer, wherein the micro radio frequency sensor and the corrugated antenna are both arranged on the same side of the label surface layer; the designated position being the trough at the middle position of the corrugated antenna; leaving a gap between the corrugated antenna and the micro radio frequency sensor; label lamination by pressing the label surface layer pasted with the corrugated antenna and the micro radio frequency sensor against the label bottom layer so that the corrugated antenna and the micro radio frequency sensor are both located between the label surface layer and the label bottom layer to obtain a radio frequency tag. The radio frequency tag of this application has a simple structure, an environmentally friendly method, a long service life, and a low cost, which is conducive to the popularization of RFID tag radio frequency technology.

Description

Technical Field

[0001] The present application relates to the field of wavy antenna tags, and in particular to a radio frequency tag and a manufacturing method thereof. Background Art

[0002] At present, RFID tags and radio frequency technologies are applied more and more widely. With different usage scenarios, RFID tags with different structures are derived. Each RFID tag has its own advantages and disadvantages, as well as different defects.

[0003] In the related art, a radio frequency tag manufactured by an inlay method in which a chemically etched wavy antenna of a PET aluminum foil film is fixed to a chip with a conductive adhesive is the mainstream RFID tag for radio frequency technology applications. However, since the chip is bonded to the chemically etched aluminum foil wavy antenna with a conductive adhesive, the chemically etched aluminum foil wavy antenna is likely to be peeled off during bending, so the anti-bending ability is poor and it cannot be used to manufacture "laundry tags" and automobile tire tags.

[0004] The radio frequency RFID tags of the above related art have poor anti-bending ability. Summary of the Invention

[0005] In order to improve the anti-bending ability of radio frequency RFID tags, the present application provides a radio frequency tag and a manufacturing method thereof.

[0006] In a first aspect, a radio frequency tag and a manufacturing method thereof provided by the present application adopt the following technical solutions:

[0007] A manufacturing method of a radio frequency tag includes the following steps:

[0008] Attach a wavy antenna by pasting the wavy antenna onto the label surface layer on the side coated with an adhesive layer;

[0009] Attach a micro radio frequency sensor by pasting the micro radio frequency sensor onto a specified position on the label surface layer. The micro radio frequency sensor and the wavy antenna are both arranged on the same side of the label surface layer; the specified position is the trough at the middle position of the wavy antenna; there is a gap between the wavy antenna and the micro radio frequency sensor;

[0010] Label lamination: Press and laminate the label surface layer pasted with the wavy antenna and the micro radio frequency sensor with the label bottom layer so that the wavy antenna and the micro radio frequency sensor are both located between the label surface layer and the label bottom layer to obtain a radio frequency tag.

[0011] By adopting the above technical solution, the metal wire is made into a continuous wavy shape through extrusion to obtain a wavy antenna. The wavy antenna has the function of converting electromagnetic waves and high-frequency electrical energy, and can receive or emit signals. The label surface layer and the label bottom layer are coated with glue, so that the label surface layer and the label bottom layer are sticky, which is convenient for fixing the wavy antenna and the micro radio frequency sensor or for bonding and fixing each other. By cutting and pressing the wavy antenna in a wavy shape onto the label bottom layer and controlling the micro radio frequency sensor to correspond to a specified position, the wavy antenna and the micro radio frequency sensor are fixed between the label bottom layer and the label surface layer, so that the wavy antenna and the micro radio frequency sensor are not easily exposed. Therefore, the peeling between the wavy antenna and the micro radio frequency sensor and the label bottom layer and the label surface layer is reduced. The label bottom layer and the label surface layer are bonded to each other through an adhesive, so the bonding is relatively firm and not easily separated from each other. Therefore, when the formed radio frequency label is bent, the phenomenon that the wavy antenna and the micro radio frequency sensor are separated from the label surface layer and the label bottom layer is not likely to occur, and the anti-bending ability of the radio frequency label is improved. Since the wavy antenna, the micro radio frequency sensor, the label surface layer and the label bottom layer are low in cost and simple in manufacturing method, the cost of the radio frequency label is low and it is convenient for mass production. The radio frequency label prepared by the above method has good anti-bending ability and stability, and a long service life. The radio frequency label is small in thickness and convenient for printing and fixing. In summary, the radio frequency label of the present application helps to promote the RFID label radio frequency technology in the market.

[0012] Optionally, the wavy antenna is located above the label surface layer so that the wavy antenna drops onto the glue layer of the label surface layer after being sheared.

[0013] By adopting the above technical solution, the wavy antenna directly contacts the glue layer of the label surface layer after being sheared by the action of gravity, so that the wavy antenna is fixed to the label surface layer. The fixing is simple and easy, and the manufacturing process is relatively environmentally friendly.

[0014] Optionally, before the micro radio frequency sensor is attached, the micro radio frequency sensor is bonded to the release tape.

[0015] By adopting the above technical solution, before the micro radio frequency sensor is fixed to the label surface layer, it is first pasted on the release tape. Since the adhesion between the release tape and the micro radio frequency sensor is relatively slight, the micro radio frequency sensor and the release tape are relatively easy to separate, which is convenient for realizing the continuous pressing of the micro radio frequency sensor and fitting with the label surface layer, so that the process of fixing the micro radio frequency sensor and the label surface layer has high efficiency.

[0016] Optionally, the micro radio frequency sensor is positioned with the wavy antenna through an optoelectronic recognition system so that the micro radio frequency sensor corresponds to the position of the wavy antenna.

[0017] By adopting the above technical solution, the optoelectronic recognition system obtains the real-time position information of the wavy antenna by recognizing the wavy antenna and obtains the reference position information of the micro radio frequency sensor by recognizing the micro radio frequency sensor, and then compares the real-time position information of the wavy antenna with the reference position information of the micro radio frequency sensor until the real-time position information corresponds to the reference position information, so as to realize the relatively accurate alignment of the micro radio frequency sensor and the wavy antenna, which helps the micro radio frequency sensor to fall on the designated position more accurately.

[0018] Optionally, the wire-walking speed of the metal wire is consistent with the paper-feeding speed of the label surface layer, so that the wavy antenna is stably bonded to the glue layer of the label surface layer.

[0019] By adopting the above technical solution, the wire-walking of the metal wire is consistent with the paper-feeding speed of the label surface layer. Therefore, the intervals between adjacent two sections of the wavy antenna on the label surface layer are equal, which improves the accuracy of the position matching between the wavy antenna and the label surface layer.

[0020] Optionally, the paper-feeding of the label surface layer and the wire-walking of the metal wire stop at the same time. During the stop time, the metal wire is sheared.

[0021] By adopting the above technical solution, the metal wire is sheared during the stop time. Therefore, the cut at the end section of the metal wire is neat, and each section of the wavy antenna formed by extruding the metal wire is more regular, thus making the performance of each radio frequency label more stable.

[0022] Optionally, the paper-feeding of the label surface layer and the wire-walking of the metal wire stop at the same time. During the stop time, the micro radio frequency sensor is pressed to the designated position.

[0023] By adopting the above technical solution, during the stop time, the micro radio frequency sensor is pressed down onto the label surface layer. Since the label surface layer and the micro radio frequency sensor are relatively stationary, the position where the micro radio frequency sensor is placed is more accurate.

[0024] In a second aspect, a radio frequency label and a manufacturing method thereof provided by the present application adopt the following technical solution:

[0025] A radio frequency label, which is applied to the manufacturing method of the radio frequency label described above, includes a label bottom layer and a label surface layer. A wavy antenna and a micro radio frequency sensor are arranged between the label bottom layer and the label surface layer, and the label bottom layer and the label surface layer are mutually adhered through an adhesive.

[0026] By adopting the above technical solution, the bottom layer of the label and the surface layer of the label are bonded together by an adhesive, and the wavy antenna and the micro radio frequency sensor are covered between the bottom layer of the label and the surface layer of the label. Therefore, the wavy antenna and the micro radio frequency sensor are not easily exposed, reducing the likelihood of the wavy antenna, the micro radio frequency sensor, and the surface layer or the bottom layer of the label separating from each other when the radio frequency label is bent by an external force or deformed under pressure. Thus, the durability of the radio frequency label is greatly improved.

[0027] Optionally, the bottom layer of the label or the surface layer of the label is a piece of paper and / or a film, and the adhesive is a pressure-sensitive adhesive.

[0028] By adopting the above technical solution, the cost of the piece of paper and the film is relatively low, and the pressure-sensitive adhesive has strong adhesiveness. It can be used to make a hanging tag label. In the case where the piece of paper or the film is bent, the pressure-sensitive adhesive can also maintain good adhesion with the piece of paper or the film. With such a setting, the radio frequency label has strong durability.

[0029] Optionally, the bottom layer of the label and the surface layer of the label are non-woven fabrics, and the adhesive is a PUR type hot melt adhesive.

[0030] By adopting the above technical solution, the non-woven fabric has strong anti-bending properties and can be used to make a laundry label. The internal wavy antenna and micro radio frequency sensor can maintain good radio frequency coupling functions during the laundry process, improving the internal structural stability of the radio frequency label.

[0031] Optionally, the bottom layer of the label and the surface layer of the label are rubber sheets, and the adhesive is a rubber-based glue.

[0032] By adopting the above technical solution, the rubber sheet has good ductility. When the radio frequency label is stretched by an external force, the wavy antenna is stretched together with the rubber sheet. Therefore, the structure of the wavy antenna and the micro radio frequency sensor is not easily damaged, thus ensuring the normal operation of the radio frequency function.

[0033] Optionally, the wavy antenna is made of a metal wire, and the metal wire is any one of copper wire, aluminum wire, or stainless steel wire.

[0034] By adopting the above technical solution, since the cost of copper wire or aluminum wire in the metal wire is relatively low, the cost of the wavy antenna is greatly saved, which helps to promote the radio frequency label.

[0035] Optionally, the diameter range of the metal wire is 0.05 - 0.08 mm.

[0036] By adopting the above technical solution, since the maximum diameter range of the metal wire is 0.08 mm and its thickness is relatively thin, the thickness of the radio frequency label of the present application is thinner, and the appearance of the radio frequency label is flatter, which is convenient for printing text and digital patterns on the label surface.

[0037] Optionally, the length of the corrugated antenna after deployment is 0.4 m.

[0038] By adopting the above technical solution, the 0.4 m long corrugated antenna can receive high-frequency signals above 3 MHz, making the corrugated antenna more compatible with the micro radio frequency sensor.

[0039] Optionally, the diameter of the micro radio frequency sensor is not greater than 6 mm, and the thickness is not greater than 0.2 mm.

[0040] By adopting the above technical solution, the micro radio frequency sensor has a small thickness and occupies a small space, so the area of the micro radio frequency sensor affected by external forces is reduced, and the micro radio frequency sensor is not easily bent and deformed due to external force extrusion.

[0041] Optionally, the positional offset between the corrugated antenna and the micro radio frequency sensor is not greater than 0.3 mm.

[0042] By adopting the above technical solution, when the positional offset between the corrugated antenna and the micro radio frequency sensor is less than 0.3 mm, the radio frequency performance remains in a relatively good state, increasing the tolerance rate for manufacturing radio frequency tags.

[0043] In summary, the present application includes at least one of the following beneficial technical effects:

[0044] 1. The method for manufacturing the corrugated antenna is simple, and no waste water or waste gas is generated during the manufacturing process, which is environmentally friendly;

[0045] 2. The copper wire radio frequency corrugated antenna and the micro radio frequency sensor are not connected by conductive glue, and it is very easy to separate the micro radio frequency sensor from the radio frequency tag, achieving the purpose of recycling the micro radio frequency sensor for multiple uses. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 is a flowchart of a method for manufacturing a radio frequency tag according to an embodiment of the present application.

[0047] Figure 2 is a schematic diagram of the principle of the method flow according to an embodiment of the present application.

[0048] Figure 3 is a top view of a corrugated antenna formed by extruding a metal wire through a double pressure wheel according to an embodiment of the present application.

[0049] Figure 4 is a schematic diagram of a micro radio frequency sensor adhered to a release tape according to an embodiment of the present application.

[0050] Figure 5 is a schematic diagram of attaching a micro radio frequency sensor to a label surface layer according to an embodiment of the present application.

[0051] Figure 6 It is a schematic diagram of the separation structure between the label surface layer and the label bottom layer of a radio frequency tag according to an embodiment of the present application.

[0052] Figure 7 It is a cross-sectional view of a radio frequency tag according to an embodiment of the present application.

[0053] Figure 8 It is a schematic diagram of the structure of a micro radio frequency tag according to an embodiment of the present application.

[0054] Explanation of reference numerals: 1, label bottom layer; 2, label surface layer; 3, glue coating layer; 4, corrugated antenna; 5, micro radio frequency sensor; 51, bottom plate; 52, chip; 53, inner ring antenna; 54, outer ring antenna; 55, conductive wire.

[0055] 11, coating head; 12, metal wire; 121, guiding wheel; 122, double pressing wheel; 123, shearing knife; 124, anti-sticking pressing wheel; 13, release tape; 131, pasting controller; 132, pasting push rod; 14, pressing wheel; 15, cutting assembly; 16, finished roll of radio frequency tag. Detailed implementation manners

[0056] In related technologies, there are several ways to manufacture radio frequency tags:

[0057] Conventional tag labels include a corrugated antenna 4 and a chip 52. The corrugated antenna 4 is made by chemical etching of a PET aluminum foil film. The corrugated antenna 4 and the chip 52 are fixed together with a conductive adhesive through a PVC sheet to form an embedded radio frequency tag, which is the mainstream RFID tag in the application of radio frequency technology. However, since the chip 52 is bonded to the chemically etched aluminum foil corrugated antenna 4 with a conductive adhesive, there are differences in the anti-bending ability between the PVC and the corrugated antenna 4. Therefore, when bending, it is easy to cause the peeling of the chemically etched aluminum foil corrugated antenna 4 from the conductive adhesive and the PVC sheet. Thus, the anti-bending ability of this tag label is poor and it is difficult to be used to manufacture laundry labels and automobile tire labels.

[0058] At the same time, since the method of manufacturing the corrugated antenna 4 by chemical etching of PET aluminum foil will produce a large amount of waste water polluting the environment; it will also result in a high manufacturing cost of RFID tags, affecting the expansion of the application range of RFID tags.

[0059] In the related art, a laundry tag is made by using multiple strands of carbon fiber to form a wavy antenna 4, which is coupled to a radio frequency resonant cavity with a PCB double-layer board structure to become an RFID tag. The wavy antenna 4 made of carbon fiber is resistant to folding, and the radio frequency coupling function between the carbon fiber wavy antenna 4 and the radio frequency resonant cavity of the PCB board is not affected during the folding process of the tag. Therefore, in dynamic scenarios such as the laundry process, even if the RFID tag is bent, it is not easy to affect the structural stability of the tag. However, the material cost and manufacturing cost of the carbon fiber wavy antenna 4 in such a laundry tag are very high, and this alone far exceeds the selling price of the PET aluminum foil wavy antenna 4 RFID tag, resulting in a high manufacturing cost of the PCB double-layer board radio frequency resonant cavity assembly, exceeding the selling price of ordinary RFID tags. The selling price of the laundry tag is more than 6 times higher than the above-mentioned price of the hanging tag, which affects the application and promotion of the laundry tag.

[0060] In addition, the thickness of the PCB double-layer board radio frequency resonant cavity assembly of the laundry tag reaches 2 mm, resulting in the thickest part of the laundry tag reaching 3 mm. This not only makes the appearance of the laundry tag uneven, but also makes it difficult to print text and numbers on the surface of the laundry tag.

[0061] In the related art, a tire tag is installed inside the tire. The tire tag uses a rubber skin as the tag bottom layer 1, and a corrugated wavy antenna 4 is fixed on one side of the rubber layer. The wavy antenna 4 and the RFID chip 52 are both welded on a small PCB board. When an external force pulls the tag to elongate, the corrugated wavy antenna 4 and the tag bottom layer 1 of the rubber skin elongate together, and the stability of the wavy antenna 4 and the chip 52 welded on the PCB board is not affected, ensuring that when the tire tag is stretched by an external force, its radio frequency performance is not affected. However, the manufacturing process is complex. The IC pins of the encapsulated chip 52 need to be welded together with two bent copper wires, which leads to an increase in cost; the selling price of the tire tag is too high, restricting the popularization and application of the RFID tire tag; and due to the relatively thick PCB board, in order to protect the PCB board and the chip 52, the tire tag is buried inside the tire, resulting in troublesome installation and pasting of the tire tag.

[0062] In the manufacturing process of the radio frequency tag with a wavy antenna 4 printed with conductive ink in the related art, basically no waste liquid or waste water is generated, its manufacturing process is more environmentally friendly, and it is convenient to manufacture various personalized radio frequency wavy antennas 4. However, since the cost of the conductive ink is still higher than the above-mentioned hanging tag, it has not been widely promoted and applied.

[0063] Therefore, in order to improve the above problems, the present application provides a manufacturing method of a radio frequency tag and a radio frequency tag.

[0064] The following will further elaborate on the present application in conjunction with the Figure 1-7 accompanying drawings.

[0065] An embodiment of the present application discloses a manufacturing method of a radio frequency tag.

[0066] Refer to Figure 1 、 Figure 2 For a manufacturing method of a radio frequency tag, it includes unwinding the label surface layer 2. First, unwind the rolled label surface layer 2, and coat the adhesive on the unwound label surface layer 2. Specifically, the adhesive can be brushed on the label surface layer 2 through the coating head 11 with glue. The adhesive forms a coated glue layer 3 on the label surface layer 2, and the coated glue layer 3 makes one side of the label surface layer 2 sticky.

[0067] Refer to Figure 2 For forming the wavy antenna 4, draw the metal wire 12 roll. The metal wire 12 enters the meshing part of the double pressure wheel 122 through the guiding wheel 121. The module of the double pressure wheel 122 can be 4, 3 or 2, and the number of teeth of the double pressure wheel 122 is about 18. When the metal wire 12 passes through the double pressure wheel 122, it is extruded into a wavy antenna 4.

[0068] Refer to Figure 2 Furthermore, the metal wire 12 is extruded to form a wavy antenna 4. Specifically, the metal wire 12 can be a copper wire or an aluminum wire, and of course, it can also be other metals with higher conductivity. The diameter range of the metal wire 12 is 0.05 - 0.08 mm. In this embodiment, the diameter of the metal wire 12 can be 0.06 mm, 0.07 mm or 0.08 mm.

[0069] Refer to Figure 2 、 Figure 3 For attaching the wavy antenna 4, after the metal wire 12 is extruded by the double pressure wheel 122, a shear knife 123 is installed at the outlet of the double pressure wheel 122, and the label surface layer 2 coated with the coated glue layer 3 passes under the shear knife 123. After the wavy metal wire 12 continues to move forward for a certain distance along the transmission direction of the metal wire 12, the shear knife 123 presses down, and the metal wire 12 is cut into a wavy antenna 4. The wavy antenna 4 falls onto the coated glue layer 3 of the label surface layer 2 under the action of gravity, and the wavy antenna 4 is pasted to the label surface layer 2. Furthermore, the cut length range of the wavy antenna 4 can be between 0.13 m and 0.45 m, specifically, it can be 0.4 m. When the length of the wavy antenna 4 is 0.4 m, the wavy antenna 4 has better sensitivity.

[0070] Refer to Figure 2, Reinforcement, an anti-sticking pressure wheel 124 is also installed on the forward wire release of the label surface layer 2. The anti-sticking pressure wheel 124 can be a roller made of silicone material, which is not easy to stick to the adhesive during the process of rolling on the adhesive layer 3 of the label surface layer 2. After passing through the anti-sticking pressure wheel 124, the corrugated antenna 4 is pressed down to be squeezed with the label surface layer 2, so that the corrugated antenna 4 and the adhesive layer 3 of the label surface layer 2 are more firmly adhered.

[0071] The wire-walking speed of the metal wire 12, the linear speed of the rotation of the double pressure wheel 122, and the paper-walking speed of the label surface layer 2 are the same, and the wire-walking stop time of the metal wire 12, the rotation stop time of the double pressure wheel 122, and the stop time of the label surface layer 2 are the same, so that the corrugated antenna 4 can be stably bonded to the specified position of the adhesive layer 3 of the label surface layer 2.

[0072] Refer to Figure 4 , Figure 5 , Mount the micro radio frequency sensor 5. The micro radio frequency sensor 5 is pasted on the release tape 13. The release tape 13 is set in a roll. During operation, first unfold the release tape 13, and then control the micro radio frequency sensor 5 of the release tape 13 to be pasted with the adhesive layer 3 of the label surface layer 2 through the control component, and then wind up the release tape 13.

[0073] Refer to Figure 2 , Figure 5 , Specifically, the conveying direction of the unfolded release tape 13 is parallel to the conveying direction of the label surface layer 2, and the unfolded release tape 13 is parallel to the unfolded label surface layer 2, and the release tape 13 is located directly above the label surface layer 2. The micro radio frequency sensor 5 is pasted on one side of the release tape 13 facing the adhesive layer 3 of the label surface layer 2.

[0074] The above-mentioned release tape 13 can be made of transparent PET material. The PET material release tape 13 has high transparency, non-toxic and odorless, high tensile strength, good stiffness, anti-burning and cracking resistance, not easy to break, excellent electrical and optical properties, good oxygen and moisture barrier properties, can withstand low temperatures of minus 70 °C, can withstand high temperatures of 200 °C, and has excellent properties of corrosion resistance and stable shrinkage. In addition, the release tape 13 can also be made of PE film, OPP film, etc., so that the surface of the release tape 13 has a light and stable release force.

[0075] The diameter of the above-mentioned micro radio frequency sensor 5 can be below 10 mm, and the thickness can be below 0.3 mm. Specifically, in this embodiment, the diameter of the micro radio frequency sensor 5 can be 0.08 mm and the thickness is 0.2 mm.

[0076] Refer to Figure 1 , Figure 5, the above control component may include a pasting controller 131 and a pasting push rod 132 disposed below the pasting controller 131. The pasting controller 131 receives the position signal of the optoelectronic recognition system to control the downward pressing of the pasting push rod 132. Specifically, during the conveying process, the optoelectronic recognition system acquires the reference position information of the preset micro radio frequency sensor 5 and the real-time position information of the movement of the wavy antenna 4 driven by the label surface layer 2 during the conveying process. The reference position information is the designated position on the label surface layer 2 where the micro radio frequency sensor 5 should be pasted during the conveying process of the label surface layer 2. This designated position can usually be the trough position of the wavy antenna 4 of the wavy shape. Specifically, the micro radio frequency sensor 5 can be placed at the trough position near the middle of the wavy antenna 4. At this time, the wavy antenna 4 and the micro radio frequency sensor 5 have better radio frequency sensitivity. Further, the micro radio frequency sensor 5 is located at the trough of the wavy antenna 4 at the middle position, which can be at the central trough or at the trough near the central position.

[0077] Further, a distance is opened between the wavy antenna 4 and the micro radio frequency sensor 5, so that there is no need for an electrical connection between the wavy antenna 4 and the micro radio frequency sensor 5, but a common radio frequency signal emission source or radio frequency signal reception source is formed through electromagnetic induction coupling, thus reducing the damage of the circuit during electrical connection.

[0078] And the above real-time position information is variable. The optoelectronic system will compare the real-time position information with the reference position information. When the real-time position information is consistent with the reference position information, it indicates that the micro radio frequency sensor 5 is aligned with the designated position. At this time, the micro radio frequency sensor 5 is located below the pasting push rod 132, and the designated position is also located below the micro radio frequency sensor 5. At this time, the optoelectronic recognition system sends an execution signal to the pasting controller 131, and the pasting controller 131 controls the pasting push rod 132 to press down. The position where the release tape 13 contacts the pasting push rod 132 moves downward, so that the micro radio frequency sensor 5 is pasted at the designated position. When the pasting push rod 132 moves upward, the release tape 13 tightens and moves upward, so that the release tape 13 maintains a state parallel to the label surface layer 2.

[0079] Further, when the distance between the wavy antenna 4 and the micro radio frequency resonator is less than 1 mm, there is no need for an electrical connection between the wavy antenna 4 and the micro radio frequency sensor 5, but they become a common radio frequency signal emission source or reception source through electromagnetic induction coupling. During the actual operation process, the position offset between the micro radio frequency sensor 5 and the wavy antenna 4 is not greater than 0.3 mm, and when the relative position change between the wavy antenna 4 and the micro radio frequency sensor 5 is less than 0.3 mm, it is not easy to affect the radio frequency performance of the wavy antenna 4 and the micro radio frequency sensor 5.

[0080] Refer to Figure 2, unwind the label bottom layer 1. First, unwind the rolled-up label bottom layer 1 and apply an adhesive to the unwound label bottom layer 1. The adhesive also forms an adhesive layer 3 on the label bottom layer 1. The adhesive layer 3 makes one side of the label bottom layer 1 sticky.

[0081] Refer to Figure 2 , label lamination. Transfer the label bottom layer 1 with an adhesive layer 3 formed on one side to the side of the label top layer 2 where the micro radio frequency sensor 5 is pasted. Then, use a pressing wheel 14 to press the label top layer 2 with the wavy antenna 4 and the micro radio frequency sensor 5 pasted on it against the label bottom layer 1 to obtain a laminated roll material. Both the wavy antenna 4 and the micro radio frequency sensor 5 are between the label top layer 2 and the label bottom layer 1, and the wavy antenna 4 and the micro radio frequency sensor 5 are at a certain distance from the edges of the label top layer 2 and the label bottom layer 1. The adhesive layer 3 between the adhesive layer 3 of the label bottom layer 1 and the label top layer 2 can firmly paste around the wavy antenna 4 and the micro radio frequency sensor 5, and the wavy antenna 4 and the micro radio frequency sensor 5 are not easily exposed.

[0082] Refer to Figure 1 , Figure 2 , cutting. Use cutting components 15 such as die-cutting knives and slitting knives to die-cut and slit the laminated roll material to obtain radio frequency tags. Specifically, during the die-cutting process, the die-cutting knives are combined into a die-cutting plate according to the shape requirements of the radio frequency tags. When the shape of the radio frequency tag is square, the die-cutting knives form a square-frame-shaped die-cutting plate; under the action of pressure, the die-cutting plate die-cuts the laminated roll material into square radio frequency tags.

[0083] Refer to Figure 1 , Figure 2 , during the slitting process, use a slitting knife to slit the wide laminated roll material into multiple narrow laminated roll materials, which can make the laminated roll material cut finer. After die-cutting and slitting by the cutting components 15, a finished roll 16 of radio frequency tags is obtained.

[0084] The implementation principle of a manufacturing method of a radio frequency tag according to an embodiment of the present application is as follows: Unwind the label surface layer 2, apply an adhesive on one side of the label surface layer 2 after it is unfolded to make the label surface layer 2 sticky; Extrude the metal wire 12 to form a wavy antenna 4 in a wavy shape, cut the wavy antenna 4 so that the wavy antenna 4 adheres to the label surface layer 2, and then use an optoelectronic control system to control the micro radio frequency sensor 5 to fit with a specified position of the label surface layer 2, so that the wavy antenna 4 is coupled with the label surface layer 2; Then control the label surface layer 2 and the label bottom layer 1 to adhere to each other through the glue layer 3. Since the wavy antenna 4 and the micro radio frequency sensor 5 are both arranged between the label surface layer 2 and the label bottom layer 1, the label bottom layer 1 and the label surface layer 2 protect the wavy antenna 4 and the micro radio frequency sensor 5, making it difficult for the wavy antenna 4 and the micro radio frequency sensor 5 to leak out. The radio frequency tag has strong anti-bending ability, and the manufacturing process of the radio frequency tag is environmentally friendly and pollution-free.

[0085] An embodiment of the present application also discloses a radio frequency tag.

[0086] Embodiment 1:

[0087] Refer to Figure 6 、 Figure 7 A radio frequency tag, which is applied to the manufacturing method of a radio frequency tag described above, includes a label bottom layer 1 and a label surface layer 2. A wavy antenna 4 and a micro radio frequency sensor 5 are installed between the label bottom layer 1 and the label surface layer 2. The label bottom layer 1 and the label surface layer 2 fix the wavy antenna 4 and the micro radio frequency sensor 5 between them through an adhesive.

[0088] Further, the micro radio frequency sensor 5 is located at the trough of the middle position of the wavy antenna 4, which can be at the centered trough or at the trough close to the centered position. There is a gap between the wavy antenna 4 and the micro radio frequency sensor 5, so that the wavy antenna 4 and the micro radio frequency sensor 5 do not need to be electrically connected, but form a common radio frequency signal emission source or radio frequency signal reception source through electromagnetic induction coupling. Therefore, the damage of the circuit during electrical connection is reduced.

[0089] The above-mentioned wavy antenna 4 is made of a metal wire 12. The metal wire 12 can be a copper wire, an aluminum wire, stainless steel or other metals, or a wavy antenna 4 made of an alloy with copper, aluminum or other metals. Further, the diameter range of the metal wire 12 is 0.05 - 0.08 mm, and the length of the wavy antenna 4 after unfolding is 0.4 m. When the length of the metal wire is less than 0.4 m, the sensitivity of the wavy antenna 4 will decrease rapidly.

[0090] The diameter of the above-mentioned micro radio frequency sensor 5 is not greater than 6 mm, and the thickness is not greater than 0.2 mm. Further, the positional offset between the wavy antenna 4 and the micro radio frequency sensor 5 is not greater than 0.3 mm.

[0091] Referring to Figure 8 , further, the micro radio frequency sensor 5 includes a bottom plate 51 and a chip 52 with two pins attached to the bottom plate 51. An inner ring antenna 53 is installed on the bottom plate 51, and an outer ring antenna 54 is also disposed around the inner ring antenna 53. Both the inner ring antenna 53 and the outer ring antenna 54 are in the shape of a ring with a notch. One end of the inner ring antenna 53 is connected to one end of the outer ring antenna 54 through a conductive wire 55, and the other end of the inner ring antenna 53 and the other end of the outer ring antenna 54 are respectively connected to the two pins of the chip 52. The connection points of the pins of the chip 52 are outside the range where the chip 52 covers the bottom plate 51. With such a setting, the pins do not additionally occupy the thickness of the entire micro radio frequency sensor 5, and the gap between the chip 52 and the bottom plate 51 can be reduced, so it helps to reduce the thickness of the micro radio frequency sensor 5.

[0092] The above-mentioned label layer and the label surface layer 2 can be of the same material. Specifically, they can be paper sheets such as writing paper, kraft paper, coated paper, double-sided offset paper, or glazed paper, or films such as PET film, PC film, PVC film, ABS film, PE film, PP film, BOPP film, and composite film.

[0093] The adhesive is coated on one side of the label surface layer 2 and one side of the label bottom layer 1 to form an adhesive layer 3. And the wavy antenna 4 and the micro radio frequency sensor 5 are both located at a position close to the center of the label surface layer 2. The side of the label bottom layer 1 coated with the adhesive layer 3 is correspondingly adhered to the side of the label surface layer 2 coated with the adhesive layer 3, so that the edges of the label bottom layer 1 and the label surface layer 2 correspond. There is a certain distance between the wavy antenna 4 and the micro video sensor and the edge of the label surface layer 2, so that the wavy antenna 4 and the micro radio frequency sensor 5 are not easily exposed outside the label surface layer 2 and the label bottom layer 1.

[0094] The above-mentioned adhesive can be a pressure-sensitive adhesive. Specifically, it can be a natural rubber pressure-sensitive adhesive, a synthetic rubber pressure-sensitive adhesive, or a thermoplastic elastomer pressure-sensitive adhesive, etc. The adhesion of the pressure-sensitive adhesive is relatively firm, and the wavy antenna 4 and the micro radio frequency sensor 5 are not connected by a conductive adhesive. Therefore, when disassembling, the micro radio frequency sensor 5 can be easily separated from the radio frequency label, and the purpose of recycling the micro radio frequency sensor 5 for reuse can be achieved, thus greatly reducing the application cost of the radio frequency label and being conducive to the application and promotion of radio frequency technology.

[0095] The implementation principle of Embodiment 1 is as follows: In this application, the corrugated antenna 4 and the micro radio frequency sensor 5 are integrally pasted between the label surface layer 2 and the label bottom layer 1, so that the corrugated antenna 4 and the micro radio frequency sensor 5 are not easily exposed, and they have strong anti-bending ability. Moreover, due to the small sizes of the corrugated antenna 4 and the micro radio frequency sensor 5, the surface flatness of the manufactured radio frequency label is good and printing can be implemented. Since the structure of the radio frequency label is simple, the cost of the radio frequency label is low, which is conducive to the popularization of radio frequency technology.

[0096] Embodiment 2:

[0097] The difference between this embodiment and Embodiment 1 is that the materials of the label bottom layer 1 and the label surface layer 2 are non-woven materials such as spunlace non-woven fabric, heat-sealed non-woven fabric, pulp air-laid non-woven fabric, wet non-woven fabric, spunbond non-woven fabric, meltblown non-woven fabric, needled non-woven fabric or stitch-bonded non-woven fabric, etc. From the perspective of materials, the meltblown fabric can also be PET non-woven fabric or PP non-woven fabric, etc.

[0098] The type of the above-mentioned adhesive is PUR-type hot melt adhesive, specifically it can be thermoplastic PU elastomer hot melt adhesive or reactive PU hot melt adhesive.

[0099] The implementation principle of Embodiment 2 is as follows: The non-woven fabric can be washed with water, so the manufactured radio frequency label is resistant to folding and is not easily affected by the radio frequency function of the radio frequency label, which is suitable for making laundry labels.

[0100] Embodiment 3:

[0101] The difference between this embodiment and Embodiment 1 is that the materials of the label bottom layer 1 and the label surface layer 2 can be rubber sheets, and the adhesive can be a rubber-based glue made from synthetic rubber, such as chloroprene rubber glue, HY-308 metal rubber glue, HY-T160PE slow-drying glue, HY-T160PP slow-drying glue, etc. or cold vulcanized sulfur glue, etc. The bonding between the rubber-based glue and the rubber sheet is relatively firm, and the performance between the rubber-based glue and the rubber sheet is better.

[0102] The implementation principle of Embodiment 3 is as follows: When an external force pulls the label to elongate, the corrugated antenna 4 elongates together with the rubber skin label bottom layer 1, and the stability of the corrugated antenna 4 and the micro radio frequency sensor 5 is not affected. When the tire label is stretched by an external force, its radio frequency performance is not affected. The connection method between the corrugated antenna 4 and the micro radio frequency sensor 5 is simple and does not require welding pins, so its cost is low and its versatility is strong. Moreover, since the PCB board structure is removed, this embodiment does not require protecting the brittle PCB board and can be directly installed on the outside of the tire instead of the inside of the tire. The installation method of the tire label is simple and the signal is good.

[0103] The above are all preferred embodiments of this application, and the protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A manufacturing method of a radio frequency tag, characterized in that: The radio frequency tag includes a tag bottom layer (1) and a tag surface layer (2). A wavy antenna (4) and a micro radio frequency sensor (5) are arranged between the tag bottom layer (1) and the tag surface layer (2). The tag bottom layer (1) and the tag surface layer (2) are adhered to each other through an adhesive. The wavy antenna (4) is made of a metal wire (12). The manufacturing method of the radio frequency tag includes the following steps: Mount the wavy antenna (4), and paste the wavy antenna (4) onto the tag surface layer (2) on one side coated with an adhesive layer (3). Mount the micro radio frequency sensor (5), and paste the micro radio frequency sensor (5) onto a specified position of the tag surface layer (2). The micro radio frequency sensor (5) and the wavy antenna (4) are both arranged on the same side of the tag surface layer (2). The specified position is the trough at the middle position of the wavy antenna (4). There is a gap between the wavy antenna (4) and the micro radio frequency sensor (5). Tag lamination, press the tag surface layer (2) pasted with the wavy antenna (4) and the micro radio frequency sensor (5) against the tag bottom layer (1) so that the wavy antenna (4) and the micro radio frequency sensor (5) are both located between the tag surface layer (2) and the tag bottom layer (1) to obtain a radio frequency tag. The wavy antenna (4) is located above the tag surface layer (2) so that after the wavy antenna (4) is sheared, it drops onto the adhesive layer (3) of the tag surface layer (2). Before mounting the micro radio frequency sensor (5), the micro radio frequency sensor (5) is adhered to a release tape (13). The micro radio frequency sensor (5) is positioned with the wavy antenna (4) through an optoelectronic recognition system so that the positions of the micro radio frequency sensor (5) and the wavy antenna (4) correspond to each other. Mount the micro radio frequency sensor (5). The micro radio frequency sensor (5) is pasted on the release tape (13). The release tape (13) is wound in a roll. During operation, first unroll the release tape (13), then control the micro radio frequency sensor (5) of the release tape (13) to be pasted with the adhesive layer (3) of the tag surface layer (2) through a control component, and then wind up the release tape (13). The conveying direction of the unrolled release tape (13) is parallel to the conveying direction of the tag surface layer (2), and the unrolled release tape (13) is parallel to the unrolled tag surface layer (2), and the release tape (13) is located directly above the tag surface layer (2). The micro radio frequency sensor (5) is pasted on one side of the release tape (13) facing the adhesive layer (3) of the tag surface layer (2). The control component includes a pasting controller (131) and a pasting push rod (132) arranged below the pasting controller (131). The pasting controller (131) receives the position signal of the optoelectronic recognition system to control the downward pressure of the pasting push rod (132).

2. The manufacturing method of a radio frequency tag according to claim 1, characterized in that: The running speed of the metal wire (12) is consistent with the paper running speed of the tag surface layer (2) so that the wavy antenna (4) is stably bonded to the adhesive layer (3) of the tag surface layer (2).

3. The manufacturing method of a radio frequency tag according to claim 1, characterized in that: The paper running of the tag surface layer (2) and the wire running of the metal wire (12) stop at the same time. During the stop time, the metal wire (12) is sheared.

4. The manufacturing method of a radio frequency tag according to claim 1, characterized in that: The paper feed of the label surface layer (2) stops at the same time as the wire running of the wire (12). During this stop time, the micro radio frequency sensor (5) is pressed to the specified position.

5. The manufacturing method of a radio frequency tag according to claim 1, characterized in that: The label bottom layer (1) or the label surface layer (2) is made of paper and / or film, and the adhesive is a pressure-sensitive adhesive.

6. The manufacturing method of a radio frequency tag according to claim 1, characterized in that: The label bottom layer (1) and the label surface layer (2) are non-woven fabrics, and the adhesive is a PUR type hot melt adhesive.

7. The manufacturing method of a radio frequency tag according to claim 1, characterized in that: The label bottom layer (1) and the label surface layer (2) are rubber sheets, and the adhesive is a rubber type glue.

8. The manufacturing method of a radio frequency tag according to claim 1, characterized in that: The diameter range of the wire (12) is 0.05 - 0.08 mm.

9. The manufacturing method of a radio frequency tag according to claim 1, characterized in that: The length of the unfolded wavy antenna (4) is 0.4 m.

10. A manufacturing method of a radio frequency tag according to claim 1, characterized in that: The diameter of the micro radio frequency sensor (5) is not greater than 6 mm, and the thickness is not greater than 0.2 mm.

11. A manufacturing method of a radio frequency tag according to claim 1, characterized in that: The position offset between the wavy antenna (4) and the micro radio frequency sensor (5) is not greater than 0.3 mm.

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