Wireless recognition tag for tire installation and its manufacturing method

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 wireless recognition tag for tire attachment (embedding), and more particularly to a wireless recognition tag for tire attachment that can be completely attached (embedded) inside a tire by inserting rubber between an antenna and a substrate during tire vulcanization, and a method for manufacturing the same.

Background Art

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

[0003] Particularly, in the Product Liability Law, it is stipulated that when a product defect infringes on the life, body, or property of others, the manufacturing enterprise has the responsibility to compensate for the losses incurred regardless of the presence or absence of negligence. Therefore, manufacturing enterprises must thoroughly manage each tire.

[0004] Therefore, tire manufacturing enterprises are using RFID tags as wireless recognition tags that can store product history and usage history in order to manage each tire (by adhering them).

[0005] Most conventional wireless recognition tags are of the helical type. However, since such a helical type is inserted into the tire with the inside of the helical (spiral) structure empty, the air inside the helical structure cannot be completely discharged. That is, conventional wireless recognition tags are inserted into the tire with air present inside the helical structure and commercialized, but such a part acts as a defective element.

[0006] For example, there is a risk of air bubbles forming inside the tire, which could weaken the adhesive strength of the wireless recognition tag and cause it to easily detach. Furthermore, there is a possibility that the durability of the tire with the embedded wireless recognition tag may decrease due to continuous impacts applied during vehicle operation, depending on road conditions, vehicle condition, etc.

[0007] To address the problems mentioned above, wireless recognition tags with built-in antennas have been developed. However, these wireless recognition tags with built-in antennas have a problem in that only the circuit board is directly attached to the tire, and the circuit board attached to the tire can be damaged, resulting in insufficient durability.

[0008] Research into methods for manufacturing wireless recognition tags is needed to address these problems. [Prior art documents] [Patent Documents]

[0009] [Patent Document 1] Korean Registered Patent No. 10-2332843 (November 25, 2021) [Overview of the project] [Problems that the invention aims to solve]

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

[0011] The present invention aims to achieve the technical problems described above, and one embodiment of the present invention provides a wireless recognition tag for tire attachment, comprising a PCB substrate including a main body and antenna mounting portions extending from both sides of the main body, an RFID chip installed on the main body, and an antenna having a predetermined length and formed in a helical shape, which is fitted along the length direction of the antenna mounting portion, wherein the internal front / rear width of the helical shape of the antenna is formed to be larger than the front / rear width of the PCB substrate, thereby forming a space between the antenna mounting portion and the antenna at a predetermined distance apart.

[0012] Furthermore, in the wireless recognition tag for tire attachment according to one embodiment of the present invention, fitting holes are formed in the main body and the antenna mounting portion, and one end of the antenna can be connected to the fitting hole in the main body, and the other end of the antenna can be connected to the fitting hole in the antenna mounting portion.

[0013] Furthermore, the wireless recognition tag for tire attachment according to one embodiment of the present invention can be configured such that a break guide groove is formed in the portion of the antenna mounting section that connects to the main body section.

[0014] Furthermore, a wireless recognition tag for tire attachment according to one embodiment of the present invention may be configured to further include a protective cap formed by molding the main body portion to protect the RFID chip.

[0015] Furthermore, the wireless recognition tag for tire attachment according to one embodiment of the present invention can be configured such that at least one rubber insertion hole is formed along the longitudinal direction of the antenna installation portion.

[0016] A method for manufacturing a wireless recognition tag for tire attachment according to one embodiment of the present invention is technically characterized by including the steps of: preparing a PCB substrate including a main body portion to which an RFID chip is attached and antenna mounting portions extending on both sides of the main body portion; manufacturing a metal antenna having a predetermined length and formed in a helical shape, wherein the front / rear width of the interior of the helical shape is greater than the front / rear width of the PCB substrate; inserting and fitting the antenna into the end of the antenna mounting portion; and bonding the fitted antenna and the RFID chip so that they are connected.

[0017] Furthermore, a method for manufacturing a wireless recognition tag for tire attachment according to one embodiment of the present invention may include the steps of: molding a protective cap onto the main body of a PCB substrate to which the antenna is attached; applying a primer to the PCB substrate; and applying a rubber solution to the PCB substrate.

[0018] Furthermore, a method for manufacturing a wireless recognition tag for tire attachment according to one embodiment of the present invention may further include the step of forming a break guide groove in the portion of the antenna installation section that connects to the antenna.

[0019] Furthermore, a method for manufacturing a wireless recognition tag for tire attachment according to one embodiment of the present invention may further include the step of forming at least one rubber insertion hole along the longitudinal direction of the antenna installation portion. [Effects of the Invention]

[0020] According to the present invention, since rubber is inserted between the antenna and the substrate during tire vulcanization, the wireless recognition tag can be completely attached to the inside of the tire, thereby improving the adhesion force of the wireless recognition tag to the tire and improving its durability.

[0021] Also, according to the present invention, the excellent adhesion of the wireless recognition tag to the tire can be maintained for a long period of time, and thereby the durability of the tire to which the wireless recognition tag is attached can be further improved.

[0022] Also, according to the present invention, by forming the break guide groove, the substrate is first broken at the break guide groove portion, suppressing the breakage of other portions, and even if the break guide groove portion is broken, the connectivity between the RFID chip and the antenna is maintained, so that the wireless recognition tag can still operate.

Brief Description of the Drawings

[0023] [Figure 1] It is a configuration diagram of a wireless recognition tag for tire attachment according to an embodiment of the present invention. [Figure 2] It is a configuration diagram of a PCB substrate 100 according to an embodiment of the present invention. [Figure 3] It is a drawing showing a state in which an antenna 200 is coupled to the PCB substrate 100 of FIG. 2. [Figure 4] It is a configuration diagram of a PCB substrate 100 according to another embodiment of the present invention. [Figure 5] It is a drawing showing a state in which an antenna 200 is coupled to the PCB substrate 100 of FIG. 4. [Figure 6] It is a side view of a wireless recognition tag for tire attachment according to an embodiment of the present invention. [Figure 7] It is a partial cross-sectional view of a normal tire to which a wireless recognition tag according to an embodiment of the present invention is attached. [Figure 8] It is a sequence diagram for explaining a manufacturing method of a wireless recognition tag for tire attachment according to an embodiment of the present invention.

Modes for Carrying Out the Invention

[0024] The method for manufacturing a wireless recognition tag for tire attachment with improved durability and adhesive strength according to the present invention will be described in more detail below with specific examples. However, the following embodiments are provided as examples so that the concept of the present invention can be adequately conveyed to those skilled in the art.

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

[0026] In this context, unless otherwise defined, technical and scientific terms used have the meaning typically understood by a person of ordinary skill in the art to which this invention pertains, and are defined in consideration of the function of the present invention, which may vary depending on the intent or practice of the user or operator. Therefore, definitions of such terms must be based on the overall content of this specification, and descriptions of known functions and configurations that could unnecessarily obscure the gist of the present invention in the following description are omitted.

[0027] Furthermore, the singular form used in the specification and attached claims may also include the plural form unless otherwise indicated in the context.

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

[0029] Figure 1 is a diagram of the configuration of a wireless recognition tag for tire attachment according to one embodiment of the present invention, Figure 2 is a diagram of the configuration of a PCB substrate 100 according to one embodiment of the present invention, Figure 3 is a diagram showing the state in which an antenna 200 is attached to the PCB substrate 100 of Figure 2, Figure 4 is a diagram of the configuration of a PCB substrate 100 according to another embodiment of the present invention, and Figure 5 is a diagram showing the state in which an antenna 200 is attached to the PCB substrate 100 of Figure 4.

[0030] Referring to Figures 1 to 3, a wireless recognition tag for tire attachment according to one embodiment of the present invention includes a PCB substrate 100 including a main body portion 110 and antenna mounting portions 120 extending on both sides of the main body portion, an RFID chip 111 installed on the main body portion 110, and an antenna 200 having a predetermined length and formed in a helical shape, which is fitted along the longitudinal direction of the antenna mounting portion 120. By forming the internal front / rear width of the helical shape of the antenna 200 to be larger than the front / rear width of the PCB substrate 100, a space can be formed between the antenna mounting portion 120 and the antenna 200 at a predetermined distance apart.

[0031] In this invention, a PCB substrate refers to a printed circuit board (PCB), which is an article structure in which copper foil for wiring is completed in a single shape by techniques such as pattern printing and etching on a substrate made of laminated copper plates. Printed circuit boards constructed in this way can usually be used in various electronic devices (home appliances, computers, mobile communication devices, or artificial satellites, etc.) with components such as semiconductors, capacitors, or resistors mounted on them. In the example shown in the figure, the PCB substrate 100 can be formed in the shape of a plate.

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

[0033] When FR-4 is used as the PCB substrate 100, the wireless recognition tag can be manufactured to be light and thin, and may have the effect of 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 may preferably be 0.1 to 0.5 mm thick, 1 to 5 mm wide, and 25 to 75 mm long. More preferably, it may be 0.3 mm thick, 3.5 mm wide, and 40 mm long. When the size of the PCB substrate is 0.2 mm thick, 3 mm wide, and 40 mm long, even when inserted into a tire, the original performance of the tire is not reduced, and recognition errors can be reduced.

[0034] In the present invention, the PCB substrate 100 is composed of a main body portion 110 and antenna mounting portions 120 extending from both sides of the main body portion 110. The antenna 200 has a predetermined length, is formed in a helical shape, and is fitted along the length direction of the antenna mounting portion 120. The internal front / rear width of the helical shape of the antenna 200 is formed to be larger than the front / rear width of the PCB substrate 100, thereby forming a space between the antenna mounting portion 120 and the antenna 200 at a predetermined distance apart. The front / rear width may be, for example, the width in the front-to-back direction, and the front-to-back direction may be a direction that intersects (generally orthogonal to) the length direction.

[0035] In this configuration, fitting holes are formed in both the main body portion 110 and the antenna mounting portion 120, allowing one end of the antenna 200 to be connected to the fitting hole in the main body portion 110 and the other end of the antenna 200 to be connected to the fitting hole in the antenna mounting portion 120. Such connection between the main body portion 110 and the antenna 200, and between the antenna mounting portion 120 and the antenna 200, can be performed by soldering.

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

[0037] Furthermore, the antenna 200 can be formed in various shapes, such as circular, square, or horizontal, and the number of turns can be appropriately selected between 6 and 20.

[0038] Thus, in the wireless recognition tag for tire attachment according to one embodiment of the present invention, the antenna 200 is not formed in complete contact with the PCB substrate 100, but rather a space is formed at a predetermined distance. This space further improves the adhesive strength when the wireless recognition tag is attached to the tire, and further improves durability after adhesion, enabling long-term use.

[0039] The wireless recognition tag is attached to the tire, or more specifically, embedded to a predetermined depth inside the tire.

[0040] In this invention, the rubber constituting the tire is inserted into the space, and the wireless recognition tag is completely integrated with the rubber and embedded inside the tire along with the helical structure. The inserted tire rubber plays a role in holding both the PCB substrate 100 and the antenna 200, thus improving the adhesive strength of the wireless recognition tag to the tire. Furthermore, this improvement in adhesive strength further enhances the tire's durability.

[0041] Furthermore, in one embodiment of the present invention, a break guide groove 121 can be formed in the portion of the antenna mounting part 120 that connects with the main body part 110.

[0042] For example, the fracture guide groove 121 can be formed such that the main body portion 110 maintains a rectangular shape, while the groove is sloped from the end portion of the antenna mounting portion 120 towards the main body portion 110. In the example shown in the figure, the fracture guide groove 121 is formed by cutting out the main body portion 110 such that the front-to-back width of the main body portion 110 decreases from the end portion of the antenna mounting portion 120 towards the center of the main body portion 110.

[0043] When subjected to an impact exceeding a predetermined value by such a fracture guide groove 121, the PCB substrate 100 will fracture first at the fracture guide groove 121 portion.

[0044] Since the tire is used with a wireless recognition tag attached inside, the PCB substrate 100 may be subjected to impacts of various strengths while the vehicle is in motion. When subjected to an impact exceeding a predetermined value, the PCB substrate 100 may break, but the break guide groove 121 is formed in such a way that the break guide groove 121 breaks before other parts.

[0045] As shown in the drawing, the break guide groove 121 is formed in the portion of the antenna mounting section 120 that connects to the main body section 110. This portion (for example, the connecting portion, the break guide groove 121 portion) is at a certain distance from the RFID chip 111 located on the main body section 110, so that even if the break guide groove 121 portion is broken, the RFID chip 111 will not be broken.

[0046] Furthermore, if the fracture guide groove 121 is fractured, the antenna mounting section 120 and the main body section 110 may separate from each other, or even if they do not separate, the connection between the antenna mounting section 120 and the main body section 110 may weaken, potentially causing a change in the shape of the wireless recognition tag for tire attachment while it is attached inside the tire. However, even if such a change in shape or separation occurs, the antenna 200 itself can maintain its inherent operation of transmitting / receiving signals.

[0047] In other words, in the present invention, even if a considerable impact is applied that damages the PCB substrate 100, the connectivity between the antenna 200 and the RFID chip 111 installed on the main body 110 can be maintained. This results in the effect that even if the PCB substrate 100 is damaged, it can still be used while maintaining its functionality.

[0048] Furthermore, the structure of the fracture guide groove 121 described above is such that the antenna mounting section 120 is sloped as it approaches the main body section 110. A part of the antenna 200 can be fitted into such a fracture guide groove 121, and the direction of the slope of the fracture guide groove 121 is the same as the helical direction (spiral direction) of the antenna 200, so that a part of the antenna 200 can be naturally fitted into the fracture guide groove 121. In addition to the function of being the first to break when an impact occurs, such a fracture guide groove 121 has the function of naturally guiding the antenna 200, which has a helical structure, during the joining process, making the joining process of the antenna 200 even easier.

[0049] Furthermore, in the present invention, the fracture guide groove 121 can be configured to have a "v" shape as needed.

[0050] A wireless recognition tag for tire attachment according to one embodiment of the present invention may be configured to include a protective cap 112 formed on the main body 110 to protect the RFID chip 111.

[0051] The protective cap 112 can be formed larger than the RFID chip 111 to protect the RFID chip 111, and smaller than the main body 110, and can also be formed to cover the antenna 200 if necessary to further improve durability. Specifically, it may be a structure that covers the intermediate portion where the RFID chip 111 and the antenna 200 are connected by solder (for example, the portion of the antenna 200 from the portion fitted into the break guide groove 121 to the portion extending toward the RFID chip 111, and the portion of the antenna 200 from the portion fitted into the break guide groove 121 to the portion that extends toward the RFID chip 111 by solder). Furthermore, the shape of the protective cap 112 can be formed as an ellipse as shown in the drawing, and can be formed as a rectangle if necessary.

[0052] Furthermore, in one embodiment of the present invention, the wireless recognition tag for tire attachment may have at least one rubber insertion hole 122 formed along the length direction of the antenna mounting portion 120. As shown in Figure 2, three rubber insertion holes 122 may be formed in each of the antenna mounting portions 120, and if necessary, one rubber insertion hole 122 may be formed in each of the antenna mounting portions 120 as shown in Figure 4. Each rubber insertion hole 122 may be along the length direction. Also, the number of rubber insertion holes 122 is not limited to these.

[0053] The rubber insert hole 122 can be fitted with the rubber that makes up the tire, thereby allowing the wireless recognition tag to be completely integrated with the rubber and embedded inside the tire. Furthermore, since the fitted tire rubber plays a role in holding both the PCB substrate 100 and the antenna 200, the adhesive force of the wireless recognition tag to the tire can be further improved.

[0054] Figure 8 is a sequence diagram illustrating a method for manufacturing a wireless recognition tag for tire attachment according to one embodiment of the present invention.

[0055] Referring to Figure 8, a method for manufacturing a wireless recognition tag for tire attachment according to one embodiment of the present invention can be configured to include: step S100 of preparing a PCB substrate 100 including a main body portion 110 to which an RFID chip 111 is attached and antenna mounting portions 120 extending on both sides of the main body portion 110; step S200 of manufacturing a metal antenna 200 having a predetermined length and formed in a helical shape, with the internal front / rear width of the helical shape being larger than the front / rear width of the PCB substrate 100; step S300 of inserting and fitting the antenna 200 into the end of the antenna mounting portion 120; and step S400 of bonding the fitted antenna 200 and the RFID chip 111 so that they are connected.

[0056] Step S100 is the step of preparing a PCB board 100 which includes a main body 110 to which an RFID chip 111 is attached and antenna mounting portions 120 extending on both sides of the main body 110. For example, the front / rear width of the PCB board 100 may be 0.1 to 0.5 mm, and preferably 0.3 mm. In this case, the front / rear width of the PCB board 100 is based on Figure 1 or Figure 2.

[0057] Furthermore, in step S100 of preparing the PCB substrate, fitting holes 113 and 123 can be formed on the PCB substrate 100, into which the RFID chip 111 can be attached and the end of the antenna 200 can be inserted and connected.

[0058] For example, fitting holes 113 and 123 can be formed in the main body portion 110 and the antenna mounting portion 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 portion 110. The fitting holes 123 are formed adjacent to the end of each antenna mounting portion 120 that is away from the main body portion 110.

[0059] Step S200 is a step to manufacture a metal antenna 200 having a predetermined length and formed in a helical shape, wherein the front / rear width of the interior formed by the helical shape is greater than the front / rear width of the PCB substrate 100. For example, the antenna 200 can be manufactured using stainless steel as the main material. For example, the front / rear width of the interior formed by the helical shape, i.e., the front / rear width of the internal 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 internal space of the antenna 200 is based on Figure 1 or Figure 2.

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

[0061] Step S300 is the step of inserting and fitting the antenna 200 into the end of the antenna mounting section 120, and is the step of fitting the antenna 200 which is manufactured in a helical shape. Referring to Figure 2, the antenna 200 can be fitted into the end of the antenna mounting section 120 formed on the left side and the right side, respectively.

[0062] For example, one end of the antenna 200 can be connected to the fitting hole 113 of the main body 110, and the other end of the antenna 200 can be connected to the fitting hole 123 of the antenna mounting section 120.

[0063] Step S400 is a step of bonding the mated antenna 200 and the RFID chip 111 so that they are connected, wherein a metal wire can be formed and bonded so that the mated antenna 200 and the RFID chip 111 are electrically connected. The metal wire may consist of brass wire or galvanized wire, and the metal wire may be formed of brass-plated steel wire to ensure durability. It may consist of at least one of the metals that can operate the antenna 200 and the RFID chip 111.

[0064] Furthermore, in the manufacturing method of a wireless recognition tag for tire attachment according to one embodiment of the present invention, surface mounting (SMT, Surface Mount Technology) and coating with non-modifying ink can be performed in the preparation step 100 of the PCB substrate 100.

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

[0066] Since the modified ink is photosensitive, when exposed to ultraviolet light, only the parts that receive light harden, and the remaining parts can be removed with a developer. The non-modified ink protects the circuits attached to the PCB substrate and has the effect of preventing the occurrence of solder bridges between circuits during the wave soldering process that accompanies mounting components on the PCB substrate.

[0067] The aforementioned non-modifying 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, acrylic 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.

[0068] The epoxy acrylate oligomer may, but is not limited to, a diacrylate oligomer or triacrylate oligomer with adjusted viscosity. The inclusion of the epoxy acrylate oligomer in the immutable ink may result in advantages such as improved curing properties with photocuring agents, prevention of yellowing, or enhanced adhesion.

[0069] The epoxy acrylate oligomer can, but is not limited to, be in a form in which adipic acid is replaced at a concentration of 0.01 to 10 mol / L. This replacement of the epoxy acrylate oligomer with adipic acid can improve curing properties, curing properties, and insulating properties.

[0070] The 1,3,5-triglycidyl isocyanurate (TGIC) can have a curing function (curing agent), improving electrical insulation while enhancing adhesion, thereby enabling the stable formation of a coating layer.

[0071] The aforementioned photoinitiator is 2-methyl-4'-(methylthio)-2-morpholinopro Pyofenone (2-Methyl-4'-(Methylthio)-2-M The photoinitiator may be, but is not limited to, orpholinopropiophenone, oligomeric alpha hydroxy ketone, 2-hydroxy-2-methyl-1-phenylpropane, or a mixture thereof. The inclusion of the photoinitiator in the immutable ink results in a faster curing rate and allows it to bond with the colorant to effectively exhibit hue.

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

[0073] The inorganic filler may be, but is not limited to, barium sulfate, potassium permanganate (KMnO4), or similar compounds. Including the inorganic filler in the non-modifying ink can improve printability, heat resistance, and other properties.

[0074] The aforementioned solvent is C9~C 16 The material may contain naphtha or diethylene glycol monoethyl ether acetate (carbitol acetate), which are aromatic hydrocarbons having carbon atoms and a boiling point of 165°C to 290°C. By adding the solvent to the immutable ink, the viscosity of the immutable ink can be adjusted by the solubility of the solvent.

[0075] In the step of coating with the immutable ink, the coating thickness of the immutable ink may be 80 to 120 μm, but is not limited thereto. If the coating thickness of the immutable ink is less than 80 μm, heat resistance and sensitivity may decrease, making it difficult to provide circuit protection. If it exceeds 120 μm, undercuts, which are grooves created next to the conductor pattern by etching, and rapid curing may occur, which may reduce the wireless recognition efficiency of the wireless recognition tag.

[0076] Furthermore, according to one embodiment of the present invention, the configuration may include step S500 of molding a protective cap 112 onto the main body portion 110 of the PCB substrate 100 to which the antenna 200 is attached.

[0077] The antenna 200 can be attached to the PCB board 100 through steps S100 to S400, and then molded onto the main body 110. Through this molding, the protective cap 112 can be formed.

[0078] The protective cap 112 can be formed by molding through epoxy resin coating in the S500 step, or by EMC molding.

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

[0080] EMC (Epoxy Molding Compound) materials are inorganic / organic composite materials that combine inorganic materials to enhance the functionality of a material based on a thermosetting polymer material that forms a three-dimensional hardened structure by external heat, and have the advantage of excellent molding properties and mechanical properties.

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

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

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

[0084] The primer having the solid content and viscosity improves the wettability of the primer applied to the surface of the PCB substrate 100, enhances the bonding strength with the rubber solution, and reduces the phenomenon of dripping of the liquid coating material before drying, which can lead to a thinner film thickness.

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

[0086] The polyolefin resin may, but is not limited to, a polyolefin resin having at least one reactive functional group with an inmodified ink and a rubber solution.

[0087] When the polyolefin resin is used as the primer, it may exhibit excellent adhesion to both the non-modifying ink coated on the PCB substrate 100 and the rubber solution described later, and may maintain excellent adhesion even at operating temperatures of 100°C or higher.

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

[0089] Furthermore, the primer may further contain graphene with a particle size of approximately 20 to 50 nm. The graphene may have at least one of the following particle forms: spherical, plate-shaped, needle-shaped, load-shaped, and tubular. Preferably, a spherical particle form can be used, but if a form other than spherical is used, the graphene particles may be formed in a angular shape, and the adhesive strength may be reduced by the angular portions. When applying the primer containing the graphene, there is less risk of the primer dripping, and the primer can be firmly maintained between the non-modifying ink coated on the PCB substrate 100 and the rubber solution during the application of the rubber solution described later. The graphene has a non-surface area of ​​1,000 to 2,000 m². 2 It is preferably / g, and more preferably 1,500m 2 / g is also acceptable.

[0090] The graphene may be modified graphene that has been surface-treated, or it may be surface-treated by irradiating it with microwaves.

[0091] Furthermore, the primer may have a particle size of 10 to 60 nm, but is not limited to this. Preferably, the primer may have a particle size of 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 greater the non-surface area and the larger the contact interface. This may hinder the effect of uniformly applying the primer to the RFID tag surface while reducing the coating thickness, and at the same time improving the adhesion strength with the non-modifying ink surface coated on the surface of the PCB substrate 100.

[0093] In the step of applying the primer, the application method and 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 primer application thickness is reached. Specifically, the primer can be applied to the PCB substrate 100 to a thickness of 5 to 15 μm each. When the primer is applied to the aforementioned thickness using the above application method, the wettability is good and the adhesion between the non-modifying ink and the rubber solution can be improved, and the phenomenon of the liquid coating material dripping before the primer dries, which reduces the film thickness, can be reduced.

[0094] Furthermore, after the primer application step S700, the PCB substrate 100 to which the primer has been applied can be dried using a drying oven. For example, it can be dried at a temperature of 50 to 100°C for 1 to 20 minutes, but is not limited to this. Preferably, it can be dried at a temperature of 60 to 90°C for 1 to 10 minutes.

[0095] When drying the PCB substrate 100 coated with primer under the above drying conditions, the adhesion between the non-modifying ink coated on the PCB substrate 100 and the rubber solution can be best achieved in the optimal primer drying state.

[0096] In step S700, in which a rubber solution is applied to the PCB substrate 100 after the steps described above, when the rubber solution is applied, the raw rubber remaining after the solvent evaporates from the mixed rubber solution and the tire intermediate layer become the same interface, improving adhesion and providing the effect of exhibiting semi-permanent adhesion between the PCB substrate 100 coated with the rubber solution and the tire when it is directly inserted into the tire and integrally molded. Furthermore, the risk of damage from external sources can be reduced, insulation can be improved to prevent malfunction of the wireless recognition tag, and protection from external moisture can provide a corrosion prevention effect for the wireless recognition tag.

[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 zincizing agent, and 140 to 190 parts by weight of a solvent, relative to 100 parts by weight of raw rubber.

[0098] The aforementioned raw material rubber may include, but is not limited to, natural rubber (NR), synthetic rubber (SR), or mixtures thereof, and is used in ordinary tire rubber compositions.

[0099] When using a mixture of natural rubber and synthetic rubber as the raw material, synthetic rubber has good elasticity, abrasion resistance, and low-temperature properties, but its mechanical properties are not good. Mixing it with natural rubber can provide the effect of having high mechanical properties.

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

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

[0102] The aforementioned synthetic rubbers include styrene-butadiene rubber (SBR), modified styrene-butadiene rubber, butadiene rubber (BR), modified butadiene rubber, chlorosulfonated polyethylene rubber (CSM), epichlorohydrin rubber (ECO), fluororubber (FRM / FKM), silicone rubber (SI), vinyl-methyl silicone rubber (VMQ), halogenated silicone rubber (FMQ), nitrile rubber (NBR), hydrogenated nitrile rubber (HNBR), butyl rubber (IIR), nitrile butadiene rubber (NBR), and modified nitrile butadiene rubber. 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 RubberOne or more materials selected from the group consisting of (Rubber), vinyl-benzyl-chloride-styrene-butadiene rubber, bromo-methyl-styrene-butyl rubber, Malaysian styrene-butadiene rubber, styrene-butadiene carboxylate rubber (XSBR, Carboxylic Styrene Butadiene Rubber), epoxy-isoprene rubber, Malaysian ethylene-propylene rubber, nitrile-butadiene rubber, and BIMS (brominated polyisobutyl isoprene-co-paramethyl styrene) may be used, but is not limited to these.

[0103] The raw material rubber can 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 aforementioned raw rubber materials in the aforementioned weight ratio, the durability of the wireless recognition tag can be improved by appropriately combining the advantages of natural rubber, which has excellent abrasion resistance, and synthetic rubber, which has excellent oil resistance, corrosion resistance, and friction resistance.

[0105] The inorganic filler can be selected from, but is not limited to, carbon black, alumina, aluminosilicate, calcium carbonate (CaCO3), diatomaceous earth, bentonite, montmorillonite, nontronite, beidellite, volkonskoite, hectorite, saponite, sauconite, vermiculite, halloysite, sericite, or mixtures thereof. Preferably, it may be carbon black and calcium carbonate.

[0106] The carbon black may be of various origins and types commonly used. For example, it could be 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 the carbon black in the rubber solution, the rubber product is strengthened by its high surface area characteristics, and the fine particle size of the carbon black allows it to disperse easily in the rubber solution, improving the molding speed and increasing the durability, oil resistance, and heat resistance of the rubber product.

[0108] The carbon black may be 30 to 70 parts by weight relative to 100 parts by weight of raw rubber in relation to the rubber solution, but is not limited thereto. Preferably, it may be 40 to 60 parts by weight relative to 100 parts by weight of raw rubber in relation to the rubber solution.

[0109] The calcium carbonate may be of various origins and types commonly used, and may be 10 to 30 parts by weight relative to 100 parts by weight of raw rubber in the rubber solution, but is not limited thereto. Preferably, it may be 15 to 25 parts by weight relative to 100 parts by weight of raw rubber in the rubber solution.

[0110] The aforementioned vulcanizing agent can be selected from the group consisting of sulfur-based vulcanizing agents, including inorganic 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), tetraethyltriuram disulfide (TETD), and dithiodimorpholine, but is not limited to these. 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 to further illustrate the present invention, 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 intersecting the length) 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 (length in the length direction) of 40 mm. Furthermore, the PCB board 100 was formed with a main body portion 110 with a left / right length of 7 mm and positioned in the center, and antenna mounting portions 120 were formed on both sides of the main body portion 110. As a result, each of the antenna mounting portions 120 has a left / right length of 16.5 mm.

[0114] A helical antenna 200 was fabricated, and a version with an internal front / rear width of 0.35 mm was used. In addition, a wireless recognition tag was used on the PCB board 100, in which the antenna 200 was fitted into each of the antenna mounting sections 120 to form a space.

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

[0116] <Example 3> The same wireless recognition tag as in Embodiment 1 was used, except that the break guide groove 121 was formed in the portion of the antenna mounting section 120 that is in contact with the main body section 110.

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

[0118] A helical antenna 200 was fabricated, and a version with an internal front / rear width of 0.3 mm was used. In addition, a wireless recognition tag was used in which the antenna 200 was fitted into each of the antenna mounting sections 120, so that no empty space was formed.

[0119] <Experimental Example 1> - Adhesion Strength Test To evaluate the adhesive strength improvement effect of the RFID tags manufactured according to Examples 1-3 and Comparative Example 1, tire specimens measuring 0.2 cm thick, 11 cm long, and 3 cm wide were prepared by directly inserting the RFID tags manufactured according to Examples 1-3 and Comparative Example 1 into the intermediate layer of a tire and integrally molding them. The bonding strength was then measured using the ASTM D429 (Method B) test method.

[0120] The RFID tags manufactured according to the examples and comparative examples were attached to tire specimens, which were left at room temperature for 30 minutes. The bonding strength was then evaluated by peeling them off at a speed of 100 mm / min using a universal tensile testing machine. Five bonded specimens were measured, and the average value is shown in Table 1 below. Here, bonding strength is defined as the width of the bonded specimen divided by the average load.

[0121] [Table 1] Table 1 above confirms that the bonding strength of the wireless recognition tag for tire attachment according to Example 1 is improved compared to Comparative Example 1.

[0122] Furthermore, examining Examples 1 to 3, it can be confirmed that Example 2, in which the protective cap 112 was molded into an elliptical shape, and Example 3, in which a fracture guide groove 121 was formed, showed improved bonding strength compared to Example 1.

[0123] <Experimental Example 2> - Durability Test The durability test involves testing under conditions that can be assumed to have reached the end of the tire's lifespan within a short period of time to estimate the evaluation of the actual vehicle test. The durability test was conducted under the conditions of a speed of 200-240 km / h, a load of 440-830 kg, an air pressure of 44-51 psi, a temperature of 35-40°C, and a running time of 60-80 minutes. The test involved driving at 200 km / h for 20 minutes, which is more than twice the normal speed, followed by driving at 210 km / h for 10 minutes, 220 km / h for 10 minutes, 230 km / h for 20 minutes, and 240 km / h for 10 minutes.

[0124] In addition, mileage was recorded in 10,000 km increments, and the tag status was checked every 10,000 km.

[0125] [Table 2] Table 2 above confirms that the durability of the wireless recognition tag for tire attachment according to Example 1 is improved compared to Comparative Example 1.

[0126] Furthermore, examining Examples 1 to 3, it can be confirmed that Example 2, in which the protective cap 112 was molded into an elliptical shape, and Example 3, in which a fracture guide groove 121 was formed, showed improved durability compared to Example 1.

[0127] A detailed description of preferred embodiments of the present invention disclosed above has been provided so that those skilled in the art may realize and implement the present invention. While preferred embodiments of the present invention have been described above with reference, those skilled in the art will understand that the present invention can be modified and altered in various ways without departing from the scope of the invention. For example, those skilled in the art may use the configurations described in the above embodiments in combination with each other.

[0128] Therefore, the present invention is not intended to be limited to the embodiments shown herein, but rather to grant the broadest possible scope consistent with the principles and novel features disclosed herein.

[0129] The present invention can be embodied in other specific forms without departing from the spirit and essential features of the invention. Therefore, the above detailed description should not be interpreted restrictively in all respects, but should be considered illustrative. The scope of the invention should be determined by a reasonable analysis of the appended claims, and all modifications within the equivalent scope of the invention are included within the scope of the invention. The invention is not intended to be limited to the embodiments shown herein, but rather to provide the broadest possible scope consistent with the principles and novel features disclosed herein. Furthermore, examples may be formed by combining claims that are not explicitly referenced in the claims, or by including them as new claims through amendments after filing. [Explanation of symbols]

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

Claims

1. A PCB board including a main body and antenna mounting sections extending from both sides of the main body, The RFID chip installed in the main body, The antenna includes having a predetermined length and being formed in a helical shape, and is fitted along the longitudinal direction of the antenna mounting portion, A wireless recognition tag for embedding in tires, characterized in that the internal front / rear width of the helical shape of the antenna is formed to be larger than the front / rear width of the PCB substrate, thereby forming a space between the antenna mounting portion and the antenna at a predetermined distance apart.

2. Fitting holes are formed in the main body and the antenna mounting portion, One end of the antenna is connected to the fitting hole of the main body. The wireless recognition tag for tire embedding according to claim 1, characterized in that the other end of the antenna is coupled to the fitting hole of the antenna mounting portion.

3. The wireless recognition tag for tire embedding according to claim 1, characterized in that a break guide groove is formed in the portion of the antenna mounting section that connects with the main body section.

4. The wireless recognition tag for tire embedding according to claim 1, further comprising a protective cap formed by molding the main body to protect the RFID chip.

5. The wireless recognition tag for tire embedding according to claim 1, characterized in that at least one rubber insertion hole is formed along the longitudinal direction of the antenna mounting portion.

6. The steps include preparing a PCB board that includes a main body to which an RFID chip is attached and antenna mounting sections extending from both sides of the main body, A step of manufacturing a metal antenna having a predetermined length and formed in a helical shape, wherein the front / rear width of the interior of the helical shape is formed to be greater than the front / rear width of the PCB substrate, The steps include inserting and fitting the antenna into the end of the antenna mounting section, and The steps include bonding the mated antenna and the RFID chip so that they are connected, A method for manufacturing a wireless recognition tag for tire embedding, characterized by including the following:

7. The steps include: molding a protective cap onto the main body of the PCB board to which the antenna is attached; The steps include applying a primer to the PCB substrate and The steps include applying a rubber solution to the PCB substrate, A method for manufacturing a wireless recognition tag for tire embedding according to claim 6, characterized by including the above.

8. The method for manufacturing a wireless recognition tag for tire embedding according to claim 6, further comprising the step of forming a break guide groove in the portion of the antenna mounting section that connects to the antenna.

9. The method for manufacturing a wireless recognition tag for tire embedding according to claim 6, further comprising the step of forming at least one rubber insertion hole along the longitudinal direction of the antenna mounting portion.

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