Wireless recognition tag for tire burying and method for manufacturing the same

Abstract

To provide a wireless recognition tag for tire sticking and a method for manufacturing the same.SOLUTION: This wireless recognition tag for tire sticking comprises: a PCB substrate including a body 110 and an antenna installation part 120 extending to both sides of the body; an RFID chip 111 installed in the body; and an antenna 200 formed into a helical shape having a prescribed length and fitted in the longitudinal direction of the antennal installation part. The front / rear width of the antenna installation part of the inside formed by the helical shape of the antenna is formed larger than that of the PCB substrate. Thus, the antenna installation part and the antenna are separated from each other by a prescribed interval to form a space.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a radio identification tag for attachment to (embedding in) a tire, and more particularly to a radio identification tag for attachment to a tire in which rubber is inserted between the antenna and the substrate during tire vulcanization, so that the radio identification tag can be attached (embedded) completely inside the tire, and a method for manufacturing the same. [Background technology]

[0002] In the case of automobile tires, for production control, shipping and distribution management, it is necessary to quickly know specific information about each tire, such as model, serial number, specifications, characteristics, processing history, and usage history.

[0003] In particular, the Product Liability Act stipulates that if a product defect infringes the life, body, or property of another person, the manufacturer is liable to compensate for any losses incurred, regardless of whether or not there was negligence. Therefore, manufacturers must thoroughly manage each tire.

[0004] Therefore, tire manufacturers attach (adhere) RFID tags to tires as wireless identification tags that can store product history and usage history in order to manage each tire.

[0005] Most conventional RFID tags are helical types, but these helical types are inserted into tires with the inside of the helical structure still empty, which prevents the air inside the helical structure from being completely expelled. In other words, conventional RFID tags are inserted into tires with air still inside the helical structure when they are manufactured, and this part acts as a defective element.

[0006] For example, there is a risk of air bubbles forming inside the tire, which may weaken the adhesive strength of the wireless identification tag and cause it to easily separate.Furthermore, there is a risk that the durability of the tire with the built-in wireless identification tag may decrease due to continuous impacts caused by road conditions, vehicle conditions, etc. while the vehicle is traveling.

[0007] To solve the above problems, wireless identification tags with antennas built into the substrate have been developed. However, in such wireless identification tags with built-in antennas, only the substrate is directly attached to the tire, which causes problems such as damage to the substrate attached to the tire and a lack of durability.

[0008] In order to solve these problems, research into a method for manufacturing a radio frequency identification tag is required. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Korean Patent Registration No. 10-2332843 (2021.11.25) Summary of the Invention [Problem to be solved by the invention]

[0010] The problem to be solved by the present invention is to provide a radio identification tag for attachment to a tire, in which rubber is inserted between the antenna and the substrate during tire vulcanization, so that the radio identification tag can be completely attached inside the tire, and a method for manufacturing the same. [Means for solving the problem]

[0011] The present invention has been made to achieve the above technical objectives, and a radio frequency identification tag to be attached to a tire according to one embodiment of the present invention includes a PCB substrate including a main body and antenna installation portions extending from both sides of the main body, an RFID chip installed on the main body, and an antenna formed in a helical shape with a predetermined length and fitted along the length direction of the antenna installation portion, and has a technical feature in that the front and rear widths of the interior defined by the helical shape of the antenna are larger than the front and rear widths of the PCB substrate, thereby forming a space between the antenna installation portion and the antenna at a predetermined distance.

[0012] In addition, in the wireless identification tag for attachment to a tire according to one embodiment of the present invention, fitting holes are formed in the main body and the antenna installation part, and one end of the antenna can be coupled to the fitting hole in the main body and the other end of the antenna can be coupled to the fitting hole in the antenna installation part.

[0013] In addition, the wireless identification tag for attachment to a tire according to an embodiment of the present invention may be configured so that a break guide groove is formed in a portion of the antenna installation portion that is connected to the main body portion.

[0014] In addition, the wireless identification tag for attachment to a tire according to an embodiment of the present invention may further include a protective cap formed by molding on the body portion to protect the RFID chip.

[0015] In addition, the wireless identification tag for attachment to a tire according to an embodiment of the present invention may be configured so that at least one rubber insertion hole is formed along the length of the antenna installation portion.

[0016] A method for manufacturing a radio frequency identification tag to be attached to a tire according to one embodiment of the present invention includes the steps of: preparing a PCB substrate including a main body having an RFID chip attached thereto and antenna installation portions extending from both sides of the main body; manufacturing a metal antenna having a predetermined length and formed in a helical shape, the front and rear widths of the interior of the helical shape being larger than the front and rear widths of the PCB substrate; inserting and fitting the antenna into the ends of the antenna installation portions; and bonding the fitted antenna and the RFID chip so that they are connected to each other.

[0017] In addition, a manufacturing method of a radio identification tag to be attached to a tire according to one embodiment of the present invention may include the steps of molding a protective cap on a main body of a PCB substrate to which the antenna is coupled, applying a primer to the PCB substrate, and applying a rubber solution to the PCB substrate.

[0018] In addition, the method for manufacturing a wireless identification tag to be attached to a tire according to an embodiment of the present invention may further include forming a break guide groove in a portion of the antenna installation portion where the antenna is coupled to the antenna.

[0019] In addition, the method for manufacturing a radio identification tag for attachment to a tire according to an embodiment of the present invention may further include forming at least one rubber insertion hole along a length direction of the antenna installation portion. [Effects of the Invention]

[0020] According to the present invention, rubber is inserted between the antenna and the substrate during tire vulcanization, allowing the wireless identification tag to be completely attached to the inside of the tire, thereby improving the attachment strength of the wireless identification tag to the tire and improving its durability.

[0021] Furthermore, according to the present invention, the excellent adhesive strength of the wireless identification tag to the tire can be maintained for a long period of time, thereby further improving the durability of the tire to which the wireless identification tag is attached.

[0022] Furthermore, according to the present invention, the formation of a fracture guide groove allows the substrate to fracture first at the fracture guide groove portion, thereby preventing fracture of other portions. Even if the fracture guide groove portion is fractured, the connectivity between the RFID chip and the antenna is maintained, so the wireless identification tag can still function. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a diagram illustrating the configuration of a wireless identification tag to be attached to a tire according to an embodiment of the present invention. [Figure 2] 1 is a diagram illustrating the configuration of a PCB board 100 according to an embodiment of the present invention. [Figure 3] 3 is a diagram illustrating a state in which an antenna 200 is coupled to the PCB board 100 of FIG. 2. [Figure 4] FIG. 10 is a diagram illustrating the configuration of a PCB board 100 according to another embodiment of the present invention. [Figure 5] 5 is a diagram illustrating a state in which an antenna 200 is coupled to the PCB board 100 of FIG. 4. [Figure 6] 1 is a side view of a wireless identification tag to be attached to a tire according to an embodiment of the present invention. [Figure 7] 1 is a partial cross-sectional view of a conventional tire to which a radio identification tag according to an embodiment of the present invention is attached. [Figure 8] 1 is a flowchart illustrating a method for manufacturing a wireless identification tag to be attached to a tire according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0024] The method for manufacturing a radio frequency identification tag for affixing to a tire having improved durability and adhesive strength according to the present invention will be described in more detail below with reference to specific examples. However, the following examples are provided as examples to fully convey the concept of the present invention to those skilled in the art.

[0025] Therefore, the present invention is not limited to the examples presented below, but may be embodied in other forms. The examples presented below are merely described to clarify the concept of the present invention, and the present invention is not limited thereto.

[0026] In this case, unless otherwise defined, the technical and scientific terms used have the meanings commonly understood by a person of ordinary skill in the art to which this invention belongs, and are terms defined in consideration of the functions in the present invention, which may vary depending on the intentions or practices of users and operators. Therefore, the definitions of such terms should be based on the overall content of this specification, and in the following description, descriptions of well-known functions and configurations that may unnecessarily obscure the gist of the present invention will be omitted.

[0027] Also, as used in the specification and the appended claims, the singular forms "a," "an," and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0028] The present invention will now be described in detail.

[0029] FIG. 1 is a structural diagram of a radio identification tag to be attached to a tire according to one embodiment of the present invention, FIG. 2 is a structural diagram of a PCB board 100 according to one embodiment of the present invention, FIG. 3 is a diagram illustrating a state in which an antenna 200 is coupled to the PCB board 100 of FIG. 2, FIG. 4 is a structural diagram of a PCB board 100 according to another embodiment of the present invention, and FIG. 5 is a diagram illustrating a state in which an antenna 200 is coupled to the PCB board 100 of FIG. 4.

[0030] 1 to 3, a wireless identification tag to be attached to a tire according to one embodiment of the present invention includes a PCB board 100 including a main body 110 and an antenna installation part 120 extending from both sides of the main body, an RFID chip 111 installed on the main body 110, and an antenna 200 formed in a helical shape with a predetermined length and fitted along the length of the antenna installation part 120. The front and rear widths of the interior defined by the helical shape of the antenna 200 are larger than the front and rear widths of the PCB board 100, so that a predetermined distance is formed between the antenna installation part 120 and the antenna 200 to form a space.

[0031] In the present invention, PCB board refers to a printed circuit board (PCB), which is an article configured by completing a copper foil for wiring in a single pattern on a copper plate laminated board using techniques such as pattern printing and etching. Printed circuit boards configured in this manner can be used in various electronic devices (such as home appliances, computers, mobile communication devices, and artificial satellites) with components such as semiconductors, capacitors, or resistors mounted on them. In the illustrated example, PCB board 100 can be formed in a plate shape.

[0032] The PCB substrate 100 may be made of, but is not limited to, paper phenol, glass-based epoxy (FR-4), glass-based epoxy (CEM-1, CEM-3), Teflon, metal, or ceramic. Preferably, FR-4 (Flame Retardant-4) material may be used for the PCB substrate.

[0033] When FR-4 is used for the PCB substrate 100, the radio frequency identification tag can be manufactured with a light weight and thin thickness, and can have the effect of having high heat resistance. The circuit of the PCB substrate 100 can be printed with gold and copper, and the size of the PCB substrate 100 can be preferably 0.1 to 0.5 mm thick, 1 to 5 mm wide, and 25 to 75 mm long. More preferably, it can be 0.3 mm thick, 3.5 mm wide, and 40 mm long. When the PCB substrate is 0.2 mm thick, 3 mm wide, and 40 mm long, there is little degradation in the tire's original performance when it is inserted into a tire, and recognition errors can be reduced.

[0034] In the present invention, the PCB board 100 includes a main body 110 and an antenna installation part 120 extending from both sides of the main body 110. The antenna 200 has a predetermined length and is formed in a helical shape to be fitted along the length of the antenna installation part 120, and the front / rear widths of the interior of the helical shape of the antenna 200 are larger than the front / rear widths of the PCB board 100, so that a predetermined distance is formed between the antenna installation part 120 and the antenna 200, forming a space. The front / rear width may be, for example, a width in the front / rear direction, and the front / rear direction may be a direction intersecting (approximately perpendicular to) the length direction.

[0035] At this time, a fitting hole is formed in each of the main body 110 and the antenna installation part 120, and one end of the antenna 200 may be coupled to the fitting hole of the main body 110, and the other end of the antenna 200 may be coupled to the fitting hole of the antenna installation part 120. The coupling between the main body 110 and the antenna 200 and the coupling between the antenna installation part 120 and the antenna 200 may be performed by soldering.

[0036] For reference, the antenna 200 may be made of a metal material, for example, a brass-coated steel wire. The antenna 200 may be formed in a helical or spring shape, and may have 8 to 12 turns.

[0037] The antenna 200 may be formed in various shapes such as a circular shape, a square shape, a horizontal shape, etc., and the number of turns may be appropriately selected between 6 and 20.

[0038] As described above, in the wireless identification tag for attachment to a tire according to one embodiment of the present invention, the antenna 200 is not formed in perfect contact with the PCB substrate 100, but a space is formed at a predetermined distance. Due to this space, the adhesive strength of the wireless identification tag is further improved when it is attached to the tire, and after attachment, durability is further improved, allowing it to be used for a long period of time.

[0039] The radio identification tag is attached to the tire, and more specifically, is embedded to a predetermined depth inside the tire.

[0040] In the present invention, the rubber constituting the tire is inserted into the space, and the RFID tag is completely embedded inside the tire as a single unit with the rubber along with the helical structure, and the inserted tire rubber serves to hold both the PCB board 100 and the antenna 200, thereby improving the attachment (adhesion) of the RFID tag to the tire. In addition, this improved adhesion further improves the durability of the tire during use.

[0041] In addition, in the wireless identification tag to be attached to a tire according to an embodiment of the present invention, a break guide groove 121 may be formed in the antenna installation part 120 at a portion where the antenna installation part 120 is joined to the body part 110 .

[0042] For example, as shown in the drawings, the break guide groove 121 may be formed such that the groove is inclined from the end portion of the antenna installation part 120 toward the body part 110 while the body part 110 maintains its rectangular shape. In the example shown in the drawings, the break guide groove 121 is formed by cutting out the body part 110 such that the front-to-rear width of the body part 110 becomes smaller from the end portion of the antenna installation part 120 toward the center of the body part 110.

[0043] When the PCB board 100 receives an impact of a predetermined magnitude or more due to the fracture guide groove 121, the PCB board 100 is fractured first at the fracture guide groove 121 portion.

[0044] Since a tire is used with a wireless identification tag attached inside the tire, various impacts of different strengths may be applied to the PCB board 100 while the vehicle is running. When the PCB board 100 receives an impact exceeding a predetermined value, the PCB board 100 may break, and the break guide groove 121 is formed so that the portion of the break guide groove 121 breaks before other portions.

[0045] As shown in the drawing, the fracture guide groove 121 is formed at the joining portion of the antenna installation portion 120 with the main body portion 110, and this portion (e.g., the joining portion, the fracture guide groove 121 portion) is at a certain distance from the RFID chip 111 placed in the main body portion 110, so that even if the fracture guide groove 121 portion is broken, the RFID chip 111 will not be broken.

[0046] In addition, when the breaking guide groove 121 breaks, the antenna installation part 120 and the main body part 110 may separate from each other, or even if they do not separate, the bond between the antenna installation part 120 and the main body part 110 may weaken, and the shape of the tire-attached wireless identification tag when attached inside the tire may change. However, even if such a change in shape or separation occurs, the antenna 200 itself can maintain its inherent operation of transmitting and receiving signals.

[0047] In other words, in the present invention, even if a significant impact is applied to the PCB board 100 that may cause it to break, the connectivity between the antenna 200 and the RFID chip 111 installed in the main body 110 can be maintained, thereby achieving the effect that even if the PCB board 100 is damaged, it can still maintain its functionality and be used.

[0048] Furthermore, the structure of the break guide groove 121 as described above is such that the angle is gradually increased from the antenna installation portion 120 toward the main body portion 110, and a portion of the antenna 200 can be fitted into the break guide groove 121, and the angle of the break guide groove 121 is the same as the helical direction (spiral direction) of the antenna 200, so that a portion of the antenna 200 can be naturally fitted into the break guide groove 121. The break guide groove 121 has a function of naturally guiding the helical structured antenna 200 during the coupling operation, in addition to the function of being broken first when an impact occurs, and can further facilitate the coupling operation of the antenna 200.

[0049] In addition, in the present invention, the fracture guide groove 121 may be configured to have a "v" shape, if necessary.

[0050] The wireless identification tag for attachment to a tire according to an embodiment of the present invention may include a protection cap 112 formed on the body 110 to protect the RFID chip 111 .

[0051] The protective cap 112 may be larger than the RFID chip 111 to protect the RFID chip 111 and smaller than the main body 110. If necessary, the protective cap 112 may be formed to cover the antenna 200 to further improve durability. Specifically, the protective cap 112 may be structured to cover an intermediate portion where the RFID chip 111 and the antenna 200 are connected by soldering (for example, a portion of the antenna 200 between a portion fitted in the break guide groove 121 and a portion extending toward the RFID chip 111, or a portion of the antenna 200 between a portion fitted in the break guide groove 121 and a portion extending toward the RFID chip 111 by soldering). The protective cap 112 may be oval as shown in the drawings, or rectangular if necessary.

[0052] Furthermore, in the RFID tag for attachment to a tire according to an embodiment of the present invention, at least one rubber insertion hole 122 may be formed along the length of the antenna installation portion 120. As shown in Fig. 2, three rubber insertion holes 122 may be formed in each of the antenna installation portions 120, and if necessary, as shown in Fig. 4, one rubber insertion hole 122 may be formed in each of the antenna installation portions 120. Each rubber insertion hole 122 may be formed along the length. Furthermore, the number of rubber insertion holes 122 is not limited to these.

[0053] The rubber that constitutes the tire can be inserted into the rubber insertion hole 122, so that the wireless identification tag can be completely embedded in the tire as a single unit with the rubber. In addition, the inserted tire rubber serves to hold both the PCB board 100 and the antenna 200, further improving the adhesion of the wireless identification tag to the tire.

[0054] FIG. 8 is a flowchart illustrating a method for manufacturing a wireless identification tag to be attached to a tire according to an embodiment of the present invention.

[0055] 8, a manufacturing method of a wireless identification tag to be attached to a tire according to an embodiment of the present invention may include step S100 of preparing a PCB board 100 including a main body 110 to which an RFID chip 111 is attached and antenna installation parts 120 extended from both sides of the main body 110; step S200 of manufacturing a metallic antenna 200 having a predetermined length and formed in a helical shape, the front and rear widths of the interior of the helical shape being larger than the front and rear widths of the PCB board 100; step S300 of inserting and fitting the antenna 200 into an end of the antenna installation part 120; and step S400 of bonding the fitted antenna 200 and the RFID chip 111 so that they are connected to each other.

[0056] Step S100 is a step of preparing a PCB board 100 including a main body 110 to which an RFID chip 111 is attached and antenna installation sections 120 extending from both sides of the main body 110. For example, the front and rear widths of the PCB board 100 may be 0.1 to 0.5 mm, and preferably 0.3 mm. In this case, the front and rear widths of the PCB board 100 are based on FIG. 1 or FIG. 2.

[0057] In addition, in step S100 of preparing the PCB board, an RFID chip 111 can be attached to the PCB board 100, and fitting holes 113 and 123 into which the ends of the antenna 200 can be inserted and coupled can be formed.

[0058] For example, fitting holes 113, 123 may be formed in the main body 110 and the antenna installation part 120, respectively. In the example shown in the figure, the fitting holes 113 are formed adjacent to both sides of the RFID chip 111 in the longitudinal direction (length direction) in the main body 110. Also, the fitting holes 123 are formed adjacent to the end of each antenna installation part 120 on the side farther from the main body 110.

[0059] Step S200 is a step of manufacturing a metal antenna 200 having a predetermined length and a helical shape, with the front and rear widths of the interior of the helical shape being larger than the front and rear widths of the PCB substrate 100. For example, the antenna 200 may be manufactured primarily from stainless steel. For example, the front and rear widths of the interior of the helical shape, i.e., the front and rear widths of the interior space of the antenna 200, may be 0.15 to 1.0 mm, and preferably 0.35 mm. In this case, the width of the interior space of the antenna 200 is based on FIG. 1 or 2.

[0060] The diameter of the antenna 200 can be manufactured to be 0.15 mm to 0.35 mm, and preferably 0.22 mm to 0.25 mm.

[0061] Step S300 is a step of inserting and fitting the antenna 200 into the end of the antenna installation part 120, and is a step of fitting the antenna 200 manufactured in a helical shape. Referring to FIG. 2, the antenna 200 can be fitted into the ends of the antenna installation parts 120 formed on the left and right sides, respectively.

[0062] For example, one end of the antenna 200 may be coupled to the fitting hole 113 of the main body 110 , and the other end of the antenna 200 may be coupled to the fitting hole 123 of the antenna installation part 120 .

[0063] Step S400 is a step of bonding the fitted antenna 200 and the RFID chip 111 to connect them, and a metal wire may be formed and bonded to electrically connect the fitted antenna 200 and the RFID chip 111. The metal wire may be made of brass wire or zinc-plated wire, and may be made of brass-plated steel wire to ensure durability. The metal wire may be made of at least one of metals that can operate the antenna 200 and the RFID chip 111.

[0064] In addition, in the manufacturing method of the RFID tag for attachment to a tire according to one embodiment of the present invention, in the step 100 of preparing the PCB substrate 100, surface mounting technology (SMT) and coating with permanent ink can be performed.

[0065] The permanent ink used in the permanent ink coating may include, but is not limited to, UV ink, thermally curable ink (IR ink), and PSR ink (photo-imageable solder resist ink). Preferably, photo-imageable solder resist black (PSR black) may be used. When the photo-imageable solder resist black is used as the permanent ink, a mixture of a thermally curable component and a photo-curable component is used, and a desired image can be formed through exposure and development.

[0066] The modified ink is photosensitive, so when exposed to ultraviolet light, only the exposed areas are hardened, and the remaining areas can be removed with a developer. The unmodified ink protects the circuits attached to the PCB board and prevents the occurrence of solder bridges between circuits during the wave soldering process involved in mounting components on the PCB board.

[0067] The permanent ink may contain 10 to 45 parts by weight of epoxy acrylate oligomer, 0.5 to 5 parts by weight of 1,3,5-triglycidyl isocyanurate, 1 to 20 parts by weight of epoxy resin, acrylate resin, 3 to 15 parts by weight of photoinitiator, 10 to 30 parts by weight of pigment, 0.5 to 30 parts by weight of inorganic fillers, 10 to 40 parts by weight of solvent naphtha, and 5 to 25 parts by weight of diethylene glycol monoethyl ether acetate solvent.

[0068] The epoxy acrylate oligomer may be, but is not limited to, a viscosity-adjusted diacrylate oligomer or triacrylate oligomer. The inclusion of an epoxy acrylate oligomer in the permanent ink may provide advantages such as improved curing properties with a photocuring agent, prevention of yellowing, and improved adhesive strength.

[0069] The epoxy acrylate oligomer may be substituted with adipic acid at a ratio of 0.01 to 10 mol / L, but is not limited thereto, and the epoxy acrylate oligomer may be substituted with adipic acid, which may improve hardening properties, curing properties, and insulating properties.

[0070] The 1,3,5-triglycidyl isocyanurate (TGIC) may have a curing function, and may improve electrical insulation and adhesive strength, thereby enabling a stable coating layer to be formed.

[0071] The photoinitiator is 2-methyl-4'-(methylthio)-2-morpholinopropyl Pyophenone (2-Methyl-4'-(Methylthio)-2-M The photoinitiator may be, but is not limited to, oligomeric alpha hydroxy ketone, 2-hydroxy-2-methyl-1-phenyl propane, or a mixture thereof. The inclusion of the photoinitiator in the permanent ink allows for a fast curing speed and effective color expression by combining with the colorant.

[0072] The colorant may be, but is not limited to, titanium dioxide (TiO2) or zinc oxide (ZnO). By including the colorant in the permanent ink, the permanent ink can have an ultraviolet absorbing function and improve the insulating properties of the permanent ink coating layer.

[0073] The inorganic filler may be, but is not limited to, barium sulfate, potassium permanganate (KMnO4), or a similar compound, and the inclusion of the inorganic filler in the permanent ink can improve printability, heat resistance, and the like.

[0074] The solvent is C9 to C 16 The solvent may be naphtha or diethylene glycol monoethyl ether acetate (carbitol acetate), which is an aromatic hydrocarbon having 165° C. to 290° C. and a boiling point of 165° C. to 290° C. By including the solvent in the immutable ink, the viscosity of the immutable ink can be adjusted depending on the solubility of the solvent.

[0075] In the step of coating the immutable ink, the coating thickness of the immutable ink may be, but is not limited to, 80 to 120 μm. If the coating thickness of the immutable ink is less than 80 μm, heat resistance and sensitivity may be reduced, making it difficult to achieve circuit protection, and if the coating thickness exceeds 120 μm, undercuts, which are grooves formed next to the conductor pattern due to etching, and rapid curing may occur, reducing the wireless identification efficiency of the wireless identification tag.

[0076] Also, according to an embodiment of the present invention, the method may include a step S500 of molding a protective cap 112 on the body 110 of the PCB substrate 100 to which the antenna 200 is coupled.

[0077] After the antenna 200 is coupled to the PCB substrate 100 through steps S100 to S400, molding can be performed on the body 110, and the protective cap 112 can be formed through this molding.

[0078] In step S500, molding is performed through epoxy resin coating or EMC molding to form the protective cap 112.

[0079] When the epoxy resin coating is applied, the length, width and thickness of the epoxy resin coating may vary depending on the size of the body portion 110 on which the RFID chip is installed.

[0080] EMC (Epoxy Molding Compound) material is an inorganic / organic composite material that combines inorganic materials to enhance the functionality of the material based on thermosetting polymer materials that form a three-dimensional hardened structure when exposed to external heat, and has the advantages of excellent molding and mechanical properties.

[0081] Furthermore, according to one embodiment of the present invention, the method may include step S600 of applying a primer to the PCB board 100, and step S700 of applying a rubber solution to the PCB board 100 on which the primer has been applied.

[0082] In the present invention, by manufacturing a wireless identification tag including step S600 of applying a primer, the adhesive strength between the epoxy-based permanent ink coated on the surface of the PCB substrate 100 and the rubber solution can be improved.

[0083] The primer may be a liquid polymer compound having a solid content of 26 to 30% and a viscosity of 800 to 1500 cps, but is not limited thereto.

[0084] When the primer has the solid content and viscosity, the wetting property of the primer applied to the surface of the PCB substrate 100 is good, and the adhesive strength with the rubber solution can be improved, and the phenomenon of the liquid coating material dripping before drying and thinning of the film thickness can be reduced.

[0085] The primer may be a liquid mixture and may be made of resins such as, but not limited to, polyamide, polyester, polyurethane, epoxy, synthetic resin, polyolefin, etc. Preferably, the primer may be a polyolefin resin.

[0086] The polyolefin resin may be a polyolefin resin having at least one functional group reactive with the permanent ink and the rubber solution, but is not limited thereto.

[0087] When the polyolefin resin is used as the primer, it may have excellent adhesive strength to the permanent ink coated on the PCB substrate 100 and the rubber solution described below, and may have excellent adhesive strength even at operating temperatures of 100°C or higher.

[0088] The primer contains 45 to 50 parts by weight of xylene (C6H4(CH3)2), ethyl benzene (C8H 10 The binder resin may contain 25 to 35 parts by weight of zinc oxide (ZnO), 1 to 5 parts by weight of carbon black (C), 0.1 to 1.0 part by weight of silica (SiO2), 10 to 15 parts by weight of synthetic resin, and 5 to 10 parts by weight of modified polyethylene.

[0089] The primer may further include graphene having a particle size of about 20 to 50 nm. The graphene may have at least one particle shape selected from the group consisting of spherical, plate-like, needle-like, rod-like, and tubular. Preferably, the graphene may have a spherical particle shape. However, if the graphene has a shape other than a spherical shape, the graphene particles may be formed with corners, which may reduce adhesive strength. When applying the primer containing graphene, there is little risk of the primer dripping, and during the process of applying the rubber solution described below, the primer can be firmly maintained between the permanent ink coated on the PCB substrate 100 and the rubber solution. The graphene has a non-surface area of ​​1,000 to 2,000 m. 2 / g, and more preferably 1,500m 2 / g.

[0090] The graphene may be modified by surface treatment, or may be surface-treated by microwave irradiation.

[0091] The particle size of the primer may be, but is not limited to, 10 to 60 nm, and preferably, the particle size of the primer may be 30 to 40 nm.

[0092] If the particle size of the primer deviates from the above conditions, the smaller the particle size of the primer, the larger the non-surface area and the larger the contact interface. As a result, the primer is applied uniformly to the RFID tag surface while reducing its application thickness, but at the same time, the effect of improving the adhesive strength with the permanent ink surface coated on the surface of the PCB substrate 100 may be hindered.

[0093] In the step of applying the primer, the application method and application thickness of the primer are not limited, but preferably, the primer can be applied to a thickness of 1 to 20 μm using a spray application method, and the primer can be applied multiple times until the desired primer application thickness is reached. Specifically, the primer can be applied to each of the PCB substrates 100 to a thickness of 5 to 15 μm. When the primer is applied to the desired thickness using the application method, it has good wettability, which can improve the adhesive strength between the permanent ink and the rubber solution, and can reduce the phenomenon of the liquid application material dripping before the primer dries, resulting in a thin film thickness.

[0094] After the primer application step S700, the PCB substrate 100 coated with the primer may be dried using a dryer. For example, the PCB substrate 100 may be dried at a temperature of 50 to 100°C for 1 to 20 minutes, but is not limited thereto. Preferably, the PCB substrate 100 may be dried at a temperature of 60 to 90°C for 1 to 10 minutes.

[0095] When the PCB substrate 100 coated with the primer is dried according to the drying conditions, the adhesion between the permanent ink coated on the PCB substrate 100 and the rubber solution can be most excellent in the optimal drying state of the primer.

[0096] In step S700, a rubber solution is applied to the PCB substrate 100 after the above steps. When the rubber solution is applied, the raw rubber that remains after the solvent evaporates from the mixed rubber solution and the tire intermediate layer share the same interface, improving adhesion. This allows the PCB substrate 100 coated with the rubber solution to exhibit semi-permanent adhesion to the tire when it is directly inserted into the tire and integrally molded. In addition, the risk of external damage can be reduced, insulation can be improved to prevent malfunction of the RFID tag, and corrosion of the RFID tag can be prevented by protecting it from external moisture.

[0097] In the present invention, the rubber solution may be prepared by mixing 40 to 100 parts by weight of an inorganic filler, 0.1 to 10 parts by weight of a vulcanizing agent, 2 to 10 parts by weight of a vulcanization accelerator, 6 to 12 parts by weight of a lubricant, 4 to 10 parts by weight of a zincating agent, and 140 to 190 parts by weight of a solvent, relative to 100 parts by weight of raw rubber.

[0098] The raw rubber may include natural rubber (NR), synthetic rubber (SR), or a mixture thereof, and is not limited to those used in conventional tire rubber compositions.

[0099] When natural rubber and synthetic rubber are mixed together as the raw rubber, the synthetic rubber has good elasticity, abrasion resistance, and low-temperature properties, but poor mechanical properties. By mixing natural rubber with synthetic rubber, it is possible to obtain high mechanical properties.

[0100] The raw rubber may be natural rubber, synthetic rubber, or a mixture thereof, and may be contained in a concentration of 10 to 50 wt %.

[0101] The natural rubber is preferably polyisoprene rubber obtained from nature.

[0102] The synthetic rubbers include styrene butadiene rubber (SBR, Styrene-Butadiene Rubber), modified styrene butadiene rubber, butadiene rubber (BR, Butadiene Rubber), modified butadiene rubber (Modified Butadiene Rubber), chlorosulfonated polyethylene rubber (CSM, Chlorosulphonated Polyethylene Rubber), epichlorohydrin rubber (ECO, Epichlorohydrin Rubber), fluororubber (FRM / FKM), silicone rubber (SI, Silicone rubber), vinyl-methyl silicone rubber (VMQ, Vinyl-Methyl Silicone Rubber), halogenated silicone rubber (FMQ Fluorosilicone Rubber), nitrile rubber (NBR, Acrylonitrile-Butadiene Rubber), hydrogenated nitrile rubber (HNBR, Hydrogenated Nitrile Rubber), butyl rubber (IIR, Isobutene-Isoprene Rubber), nitrile butadiene rubber (NBR, Nitrile Butadiene Rubber), and modified nitrile butadiene rubber (Modified Nitrile Butadiene Rubber, Chlorinated polyethylene rubber, Styrene-Ethylene-Butylene-Styrene rubber (SEBS), Ethylene-Propylene Rubber (EPM), Ethylene-Propylene-Diene Rubber (EPDM), Hypalon Rubber, Chloroprene Rubber (CR), Ethylene-Vinyl Acetate Rubber (EVM), Ethylene-Acrylic Rubber (AEM), Polyacrylate Rubber (ACM), Hydrin RubberRubber, Vinyl-Benzyl-Chloride-Styrene-Butadiene Rubber, Bromo-Methyl-Styrene-Butyl Rubber, Maleic Styrene Butadiene Rubber (Malaysian Styrene Butadiene Rubber), Carboxylic Styrene Butadiene Rubber (XSBR), Epoxy Isoprene Rubber, Maleic Ethylene Propylene Rubber (Malaysian Ethylene Propylene Rubber), Carboxylic Nitrile Butadiene Rubber, and BIMS (brominated polyisobutyl isoprene-co-paramethyl styrene) may be used, but are not limited to these.

[0103] The raw rubber may be a mixed rubber in which natural rubber and synthetic rubber are mixed in a weight ratio of 50:50.

[0104] By using a mixed rubber obtained by mixing the raw rubbers in the above weight ratio, the advantages of natural rubber, which has excellent abrasion resistance, and synthetic rubber, which has excellent oil resistance, corrosion resistance, and friction resistance, can be appropriately taken into account, thereby improving the durability of the wireless identification tag.

[0105] The inorganic filler may be selected from, but is not limited to, carbon black, alumina, aluminosilicate, calcium carbonate (CaCO), diatomaceous earth, bentonite, montmorillonite, nontronite, beidellite, volkonskoite, hectorite, saponite, sauconite, vermiculite, halloysite, sericite, or a mixture thereof. Preferably, the inorganic filler is carbon black or calcium carbonate.

[0106] The carbon black may be any of various commonly used carbon blacks from various sources, such as N110, N121, N134, N220, N231, N234, N242, N293, N299, S315, N326, N330, N332, N339, N343, N347, N351, N358, N375, N539, N550, N582, N630, N642, N650, N683, N754, N762, N765, N774, N787, N907, N908, N990, or N991.

[0107] By including carbon black in the rubber solution, the rubber product is strengthened due to its high surface area characteristics, and the carbon black has a fine particle diameter and is easily dispersed in the rubber solution, thereby improving the molding speed and increasing the durability, oil resistance, and heat resistance of the rubber product.

[0108] The amount of carbon black in the rubber solution may be, but is not limited to, 30 to 70 parts by weight per 100 parts by weight of raw rubber, and preferably 40 to 60 parts by weight per 100 parts by weight of raw rubber.

[0109] The calcium carbonate may be any of various types and origins that are commonly used, and may be, but is not limited to, 10 to 30 parts by weight per 100 parts by weight of raw rubber in the rubber solution, preferably 15 to 25 parts by weight per 100 parts by weight of raw rubber in the rubber solution.

[0110] The vulcanizing agent may be selected from, but is not limited to, inorganic sulfur-based vulcanizing agents such as powdered sulfur (S), insoluble sulfur (S), precipitated sulfur (S), and colloidal sulfur, or organic vulcanizing agents such as tetramethylthiuram disulfide (TMTD), tetraethylthiuram disulfide (TETD), and dithiodimorpholine. Powdered sulfur is preferred.

[0111] The present invention will be described in more detail below with reference to examples and comparative examples.

[0112] However, the following examples and comparative examples are merely illustrative examples for explaining the present invention in more detail, and the present invention is not limited to the following examples and comparative examples.

[0113] Example 1 A PCB board 100 made of FR-4 material was used, with a front / rear width (width in the direction crossing the lengthwise direction) of 0.3 mm, a top / bottom width (width in the thickness direction of the plate) of 3.5 mm, and a left / right length (lengthwise length) of 40 mm. The PCB board 100 also had a body part 110 with a left / right length of 7 mm, which was positioned in the center, and antenna installation parts 120 were formed on both sides of the body part 110. As a result, each of the antenna installation parts 120 had a left / right length of 16.5 mm.

[0114] The antenna 200 was fabricated with a helical structure, and the internal front / rear width of the antenna 200 was 0.35 mm. In addition, a wireless identification tag was used in which the antenna 200 was fitted into each of the antenna installation parts 120 of the PCB board 100 to form a space.

[0115] <Example 2> The same RFID tag as in Example 1 was used, except that a protective cap 112 was molded into an oval shape to cover the RFID chip installed in the body 110 .

[0116] Example 3 The same wireless identification tag as in Example 1 was used, except that the fracture guide groove 121 was formed in the portion of the antenna installation portion 120 that contacted the main body portion 110.

[0117] <Comparative Example 1> A PCB board 100 made of FR-4 material and having a front / rear width of 0.3 mm, a top / bottom width of 3.5 mm, and a left / right length of 40 mm was used. The PCB board 100 also had a body part 110 with a left / right length of 7 mm and positioned in the center, and antenna installation parts 120 were formed on both sides of the body part 110. As a result, each of the antenna installation parts 120 had a left / right length of 16.5 mm.

[0118] The antenna 200 was fabricated with a helical structure, and the antenna 200 had an internal front / rear width of 0.3 mm. In addition, a wireless identification tag was used in which the antenna 200 was fitted into each of the antenna installation parts 120 and no space was formed.

[0119] <Experimental Example 1> - Adhesion test To evaluate the adhesive strength improvement effect of the RFID tags manufactured in Examples 1 to 3 and Comparative Example 1, the RFID tags manufactured in Examples 1 to 3 and Comparative Example 1 were directly inserted into the intermediate layer of a tire and integrally molded to prepare tire specimens with a thickness of 0.2 cm, a length of 11 cm, and a width of 3 cm, and the adhesive strength was measured using the ASTM D429 (Method B) test method.

[0120] The tire specimens with RFID tags attached thereto according to the examples and comparative examples were left at room temperature for 30 minutes, and then peeled at a speed of 100 mm / min using a universal tensile tester to evaluate the bonding strength. Five bonded specimens were measured, and the average values ​​calculated are shown in Table 1. Here, the bonding strength is the value obtained by dividing the width of the bonded specimen by the average load.

[0121] [Table 1] From Table 1, it can be seen that the bonding strength of the wireless identification tag for affixing to a tire according to Example 1 is improved compared to Comparative Example 1.

[0122] Furthermore, when examining Examples 1 to 3, it can be seen that Example 2, in which the protective cap 112 is molded to form an elliptical shape, and Example 3, in which the fracture guide groove 121 is formed, have improved bonding strength compared to Example 1.

[0123] <Experimental Example 2>-Durability test The durability test is conducted under conditions that can be assumed to indicate the tire has reached the end of its lifespan within a short period of time, and is used to estimate the evaluation results from actual vehicle tests. The durability test was conducted under the following conditions: speed 200-240km / h, load 440-830kg, air pressure 44-51psi, temperature 35-40℃, running time 60-80 minutes. The speed was more than twice the normal speed, 200km / h, for 20 minutes, followed by 10 minutes at 210km / h, 10 minutes at 220km / h, 20 minutes at 230km / h, and 10 minutes at 240km / h.

[0124] In addition, the mileage was measured in 10,000km increments, and the condition of the tag was checked every 10,000km.

[0125] [Table 2] From Table 2, it can be seen that the durability of the wireless identification tag for affixing to a tire according to Example 1 is improved compared to Comparative Example 1.

[0126] Furthermore, when examining Examples 1 to 3, it can be seen that Example 2, in which the protective cap 112 is molded to form an oval shape, and Example 3, in which the fracture guide groove 121 is formed, have improved durability compared to Example 1.

[0127] The detailed description of the preferred embodiments of the present invention disclosed above is provided to enable those skilled in the art to realize and practice the present invention. Although the present invention has been described above with reference to the preferred embodiments, those skilled in the art will understand that various modifications and variations of the present invention can be made without departing from the scope of the present invention. For example, those skilled in the art may utilize the various configurations described in the above embodiments in combination with each other.

[0128] Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0129] The present invention may be embodied in other specific forms without departing from the spirit and essential characteristics of the present invention. Therefore, the above detailed description should not be construed as limiting in all respects, but should be considered as illustrative. The scope of the present invention should be determined by a reasonable analysis of the appended claims, and all modifications within the scope of the equivalents of the present invention are included within the scope of the present invention. The present invention is not intended to be limited to the embodiments shown herein, but is intended to be accorded the widest scope consistent with the principles and novel features disclosed herein. Furthermore, claims that do not have an explicit reference relationship in the claims may be combined to form embodiments, or may be included as new claims by amendment after filing. [Explanation of symbols]

[0130] 110: Main body, 111: RFID chip, 112: Protective cap, 113: Fitting hole, 120: Antenna installation part, 121: Break guide groove, 122: Insertion hole, 123: Fitting hole, 200: Antenna

Claims

1. a PCB substrate including a main body and antenna installation portions extending from both sides of the main body; an RFID chip installed in the main body; an antenna having a predetermined length and formed in a helical shape and fitted along the length of the antenna installation part, The antenna has a helical shape, and the front and rear widths of the antenna are larger than the front and rear widths of the PCB board, so that the antenna installation portion and the antenna are spaced apart by a predetermined distance to form a space.

2. a fitting hole is formed in each of the main body portion and the antenna installation portion; One end of the antenna is coupled to a fitting hole in the main body, 2. The tire-buried radio identification tag according to claim 1, wherein the other end of the antenna is coupled to a fitting hole in the antenna installation portion.

3. 2. The radio identification tag for embedding in a tire according to claim 1, wherein a break guide groove is formed in the antenna installation portion at a portion where the antenna installation portion is joined to the main body portion.

4. 2. The tire-buried radio frequency identification tag according to claim 1, further comprising a protective cap formed by molding on the main body portion to protect the RFID chip.

5. 2. The tire-buried radio identification tag according to claim 1, wherein at least one rubber insertion hole is formed along the length of the antenna installation portion.

6. preparing a PCB substrate including a main body portion to which an RFID chip is attached and antenna installation portions extending from both sides of the main body portion; manufacturing a metal antenna having a predetermined length and formed in a helical shape, the front and rear widths of the interior of the helical shape being larger than the front and rear widths of the PCB substrate; Inserting and fitting the antenna into the end of the antenna installation part; and bonding the fitted antenna and the RFID chip so that they are connected to each other; A method for manufacturing a radio identification tag to be buried in a tire, comprising:

7. molding a protective cap onto a body portion of the PCB substrate to which the antenna is coupled; applying a primer to the PCB substrate; and applying a rubber solution to the PCB substrate; 7. The method for producing a radio frequency identification tag to be embedded in a tire according to claim 6, comprising:

8. 7. The method for manufacturing a radio frequency identification tag to be embedded in a tire according to claim 6, further comprising the step of forming a break guide groove in a portion of the antenna installation portion where the antenna is connected.

9. 7. The method for manufacturing a radio frequency identification tag for embedding in a tire according to claim 6, further comprising the step of forming at least one rubber insertion hole along the length of the antenna installation portion.

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