Radio frequency function small-size tag for shoe industry

Abstract

The utility model discloses a shoe industry radio frequency function size small label in the radio frequency label technology field, comprising a radio frequency resonant cavity assembly and a high temperature resin layer, the outer edge size of the radio frequency resonant cavity assembly is less than 20mm * 20mm, the high temperature resin layer is arranged on the surface of the radio frequency resonant cavity assembly, and the radio frequency resonant cavity assembly is provided with a radio frequency antenna. The radio frequency resonant cavity assembly is mounted on a commodity through a high-temperature resin layer; or, the radio frequency resonant cavity assembly is installed on the washing label cloth through the high-temperature resin layer, and the washing label cloth is sewn on the commodity. According to the utility model, common size small labels in the shoe industry can be upgraded into the size small labels with the radio frequency function, so that each product has an independent radio frequency identification function, the automation of the whole process of production, quality inspection, sorting, boxing (bagging) in and out of a warehouse and the like is realized, and the informatization of the shoe industry is promoted. The cost performance of the label is higher than that of a widely used paper radio frequency shoe and clothing label.

Description

TECHNICAL FIELD

[0001] The utility model relates to radio frequency label technical field, specifically, it is related to a shoe and clothing industry radio frequency function size small label. BACKGROUND

[0002] Size small label is the only small label on shoe and clothing industry, handbag industry, home textile product industry, linen product industry, and the feature of size small label is that the size is only about 20mm*25mm, and the size of product (such as m or XL, which represents that the clothing is medium or large) is printed on it, so that the consumer can identify it. In order to facilitate the identification of clothing production process, two-dimensional code or bar code is printed on the small label. The area of bar code and two-dimensional code in the traditional size small label is small, and in the identification process, it needs to be aligned with the identification scanner, and it cannot be inclined and cannot have an obstruction, so the identification efficiency of sorting and boxing (bagging) is low, which affects the efficiency of clothing production and management.

[0003] In order to increase the radio frequency identification function of the label, it is necessary to use ultra-high frequency label, but the frequency channel of ultra-high frequency is located at 860MHz~960MHz, and the length of radio frequency antenna is greater than 40mm, so the size of traditional size small label is too small, and it is difficult to set the radio frequency function on the size small label.

[0004] In addition, because the radio frequency chip cannot be installed on the size small label, a large size paper radio frequency label is used in shoe and clothing industry, which solves the efficiency of clothing production and management, but this structure increases the operation cost of shoe and clothing industry, resulting in that many shoe and clothing industries cannot use radio frequency technology due to the cost of paper radio frequency label, label printing cost and installation cost.

[0005] How to realize the radio frequency function on the size small label is a technical challenge of existing shoe and clothing industry. UTILITY MODEL CONTENT

[0006] In order to overcome the shortcomings of the existing technology, the utility model provides a shoe and clothing industry radio frequency function size small label.

[0007] The technical scheme of the utility model is as follows:

[0008] A shoe and clothing industry radio frequency function size small label, comprising a radio frequency resonant cavity assembly and a high-temperature resin layer, the radio frequency resonant cavity assembly is directly installed on the commodity such as clothing through the high-temperature resin layer; the shoe and clothing industry radio frequency function size small label can further comprise a water-washing label cloth, the radio frequency resonant cavity assembly is installed on the water-washing label cloth through the high-temperature resin layer, and the water-washing label cloth is sewn on the commodity such as clothing.

[0009] The outer edge dimension of the RF resonant cavity assembly is less than 20 mm × 20 mm, allowing it to be formed into small size labels. The RF resonant cavity assembly includes a PET substrate film layer, an aluminum foil resonant cavity, and an RF chip. The aluminum foil resonant cavity is located on the surface of the PET substrate film layer. The RF chip is flip-encapsulated in the aluminum foil resonant cavity via conductive resin at the aluminum foil chip mounting position, so that the equivalent capacitance inside the RF chip and the equivalent inductance of the aluminum foil resonant cavity are connected in series to form a series resonance.

[0010] When the radio frequency (RF) resonator assembly is directly mounted onto clothing or other merchandise via a high-temperature resin layer, the high-temperature resin layer is bonded to the front of the RF resonator assembly at high temperature, and label information is printed on the back of the PET base film layer within the RF resonator. When the RF resonator assembly is mounted onto a washable label fabric via a high-temperature resin layer, the RF resonator assembly is bonded to the front of the washable label fabric via the high-temperature resin layer, and label information is printed on the back of the washable label fabric.

[0011] The washable label fabric can be combined with the RF resonant cavity assembly to form a single-layer sewn RF size label: the RF resonant cavity assembly is fixed to one end of the washable label fabric near the end of the fabric via a high-temperature resin layer, and the opposite end of the fabric has a sewing position for the washable label fabric, which is then sewn onto the product. In this case, the washable label fabric is 25-30 mm long and 20 mm wide.

[0012] The washable label fabric can also be combined with the RF resonant cavity assembly to form a double-layer sewn RF size label: the RF resonant cavity assembly is fixed to one end of the washable label fabric via a high-temperature resin layer. Both this end and the opposite end of the washable label fabric have sewing positions for the washable label fabric, so that when the washable label fabric is folded in half, the two sewing positions overlap, and the washable label fabric is sewn onto the product through this overlapping position. In this case, the washable label fabric is 50-60 mm long and 20 mm wide.

[0013] When using only the aluminum foil resonator as the antenna, the signal transmission distance is approximately 0.5 meters, which meets the requirements for conventional short-range RFID. For long-range identification, to achieve a longer RFID signal transmission distance, the washable label fabric is sewn onto the product using copper wire. This copper wire is coupled to the external RFID antenna of the RFID resonator assembly, creating a long-range RFID tag. The copper wire is formed by twisting bare copper wire and sewing thread together.

[0014] The advantages of this utility model based on the above-described solution are as follows: By applying the radio frequency resonant cavity assembly, this utility model can be applied to the size of existing small size tags in the footwear and apparel industry, balancing small size design with radio frequency functionality. This allows each product to have independent radio frequency identification capabilities, achieving full automation of the production, quality inspection, sorting, boxing (bagging), and warehousing processes, thus promoting the informatization of the footwear and apparel industry. Its cost-effectiveness is higher than that of widely used paper-based radio frequency footwear and apparel tags.

[0015] In this invention, the radio frequency resonant cavity assembly can be directly mounted on the product or mounted on the product using a washable label cloth, allowing the small size label to be used in different situations and broadening its application range. Furthermore, this invention can extend the radio frequency identification distance to over 7 meters, making it suitable for long-distance radio frequency identification applications. Attached Figure Description

[0016] Figure 1a This is a schematic diagram of the structure of the resin-bonded radio frequency functional size tag in this utility model;

[0017] Figure 1b This is a side sectional view of the resin-bonded radio frequency functional size tag of this utility model.

[0018] Figure 2a This is a schematic diagram of the structure of the single-layer fabric sewn radio frequency functional size tag of this utility model;

[0019] Figure 2b This is a side cross-sectional view of the single-layer fabric sewn radio frequency functional size tag of this utility model.

[0020] Figure 3a This is a schematic diagram of the structure of the double-layer fabric sewn radio frequency functional size tag of this utility model;

[0021] Figure 3b This is a side cross-sectional view of the double-layer fabric sewn radio frequency functional size tag of this utility model.

[0022] Figure 4 This is a schematic diagram of the external antenna coupling in this utility model.

[0023] In the diagram, the labels are as follows:

[0024] 1. PET base film layer; 2. Aluminum foil resonant cavity; 2-1. Resonant cavity aluminum foil chip mounting position; 2-2. External RF antenna coupling position; 3. RF chip; 4. High temperature resin layer; 5. Washable label cloth; 5-1. Sewing position of washable label cloth; 6. External sewing antenna. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0026] like Figures 1a to 4 As shown, this utility model addresses the shortcomings of existing small-size labels, which are limited by size and difficult to upgrade into RFID-enabled small-size labels. It proposes an RFID-enabled size label for the footwear and apparel industry, upgrading the most commonly used size labels in the industry to RFID-enabled labels. This gives each product a unique RFID chip, automating the entire process from production, quality inspection, sorting, and packaging (packaging) to warehousing, thus promoting informatization in the footwear and apparel industry. Its cost-effectiveness is higher than that of widely used paper RFID footwear and apparel labels.

[0027] The RFID size tag for footwear and apparel includes an RFID resonant cavity assembly and a high-temperature resin layer 4. The RFID resonant cavity assembly is directly installed on clothing and other products through the high-temperature resin layer. The RFID size tag for footwear and apparel may also include a washable label fabric 5. The RFID resonant cavity assembly is installed on the washable label fabric 5 through the high-temperature resin layer 4, and the washable label fabric 5 is then sewn onto clothing and other products.

[0028] The outer edge dimension of the RF resonant cavity assembly is less than 20 mm × 20 mm, enabling it to form a small size label. The high-temperature resin layer 4 serves as the mounting medium for the RF resonant cavity assembly, allowing it to be mounted onto the product. In one implementation, the high-temperature resin layer 4 is disposed on the surface of the RF resonant cavity assembly, and the RF resonant cavity assembly is mounted onto the product via the high-temperature resin layer 4. In another implementation, the RF resonant cavity assembly is mounted onto a washable label fabric 5 via the high-temperature resin layer 4, and the washable label fabric 5 is sewn onto the product. This invention, through the above structure, can form resin-bonded RF functional small size labels, single-layer sewn RF functional small size labels, and double-layer sewn RF functional small size labels.

[0029] 1. Resin-bonded radio frequency functional size tag

[0030] like Figure 1a , Figure 1b As shown, the resin-bonded radio frequency functional size tag includes a radio frequency resonant cavity assembly and a high-temperature resin layer 4.

[0031] (1) Radio frequency resonant cavity assembly

[0032] The radio frequency (RF) resonant cavity assembly includes a PET substrate film layer 1, an aluminum foil resonant cavity 2, and an RF chip 3. The aluminum foil resonant cavity 2 is disposed on the surface of the PET substrate film layer 1, and the RF chip 3 is disposed at the aluminum foil chip mounting position 2-1 of the aluminum foil resonant cavity 2, so that the equivalent capacitance inside the RF chip 3 is connected in series with the equivalent inductance of the aluminum foil resonant cavity 2 to form a series resonance. The PET substrate film layer 1 serves as the forming basis for the RF resonant cavity assembly, the aluminum foil resonant cavity 2 is used as an antenna, and the RF chip 3 is used to implement the RF function.

[0033] The outer edge dimension of the PET base film layer 1 is less than 20 mm × 20 mm, and its thickness is less than 50 micrometers. This size meets the size requirements of existing size labels.

[0034] The aluminum foil resonant cavity 2 is formed by etching aluminum foil on the surface of the PET substrate film layer 1, and its outer edge dimension is smaller than that of the PET substrate film layer 1. The outer edge dimension of the aluminum foil resonant cavity 2 is 16 mm × 18 mm, and its radio frequency resonant center frequency is 900 MHz.

[0035] The aluminum foil resonant cavity 2 is annular with an opening, which serves as the aluminum foil chip mounting position 2-1 for mounting the radio frequency (RF) chip 3. The RF chip 3 is encapsulated in the opening using conductive resin. The center frequency of the RF chip 3 is 900MHz, forming an RF signal with a resonant center frequency of 900MHz when connected in series with the aluminum foil resonant cavity 2. In this invention, the RF chip 3 can be a commonly available traditional chip, or it can be a custom chip. The custom chip can contain a hardware customization code corresponding to the brand manufacturer, giving it anti-counterfeiting functionality. The specific structure and function of the custom chip are not improvements of this invention and will not be described further here.

[0036] (2) High-temperature resin layer

[0037] The high-temperature resin becomes a colloid at 170 degrees Celsius, exhibiting adhesiveness. It is uniformly coated on the surface of the aluminum foil resonant cavity 2 and the RF chip 3. At room temperature, it becomes solid, protecting the RF chip 3 and allowing the high-temperature resin layer 4 to solidify at high temperature on the front side of the RF resonant cavity 2 assembly. After cooling and solidifying with the fabric surface of clothing and other goods, the high-temperature resin exhibits extremely high peel strength, reaching 20N, and is water-resistant, making it suitable for applications requiring washing.

[0038] In this resin-bonded radio frequency functional size label, the aluminum foil resonant cavity 2 and the radio frequency chip 2 are located on the front side of the PET substrate film layer 1, and the high-temperature resin layer 4 is located on the surface of the aluminum foil resonant cavity 2 and the radio frequency chip 3. The periphery of the high-temperature resin layer 4 is connected to the PET substrate film layer 1, so that the aluminum foil resonant cavity 2 and the radio frequency chip 3 are encapsulated between the PET substrate film layer 1 and the high-temperature resin layer 4. At this time, label information (text, barcode, QR code, etc.) can be printed on the back side of the PET substrate film layer 1.

[0039] 2. Single-layer fabric sewn-on radio frequency size tag

[0040] like Figure 2a , Figure 2bAs shown, the single-layer fabric sewn-on RF functional size label includes an RF resonant cavity assembly, a high-temperature resin layer 4, and a washable label fabric 5. In the single-layer fabric sewn-on RF functional size label, the aluminum foil resonant cavity 2 and the RF chip 3 are located on the front side of the PET base film layer 1, and the high-temperature resin layer 4 is located on the back side of the PET base film layer 1. The high-temperature resin layer 4 fixes the RF resonant cavity assembly to the washable label fabric 5, and label information can be printed on the back side of the washable label fabric 5.

[0041] High-temperature resin is transformed into a colloid under high temperature and pressure. This colloid is coated on the back of the PET base film layer 1. After cooling and solidification, the radio frequency resonant cavity assembly is fixed onto the washable label fabric 5, forming a single-layer sewn radio frequency functional size label. The radio frequency resonant cavity assembly is fixed to one end of the washable label fabric 5 near the end of the high-temperature resin layer 4. The opposite end of the washable label fabric 5 has a sewing position 5-1, through which the washable label fabric 5 is sewn onto the product.

[0042] The washable label fabric 5 is the same size as traditional small size labels for clothing, etc., with a length of 25-30 mm and a width of 20 mm.

[0043] 3. Double-layer fabric sewn-in RF function size tag

[0044] like Figure 3a , Figure 3b As shown, unlike the single-layer sewn RFID size label, the length of the washable label fabric 5 in the double-layer sewn RFID size label is twice that of the single-layer sewn RFID size label. That is, the length of the washable label fabric 5 is 50-60 mm and its width is 20 mm, so that the washable label fabric 5, when folded in half, forms a label fabric with a length of 25-30 mm.

[0045] The radio frequency resonant cavity assembly is fixed to one end of the washable label fabric 5 via a high-temperature resin layer 4. This ensures that when the washable label fabric 5 is folded in half, the radio frequency resonant cavity assembly is positioned between the two folded layers of washable label fabric 5, providing protection for the radio frequency resonant cavity assembly and improving its resistance to washing and high-temperature ironing. Both this end and the opposite end of the washable label fabric 5 have sewing positions 5-1, ensuring that the sewing positions 5-1 of the two washable label fabrics overlap after folding, and the washable label fabric 5 is sewn onto the product through this overlapping position.

[0046] In the aforementioned single-layer fabric sewn-on RFID size tags and double-layer fabric sewn-on RFID size tags, the washable label fabric 5 can be sewn onto the product using traditional sewing thread, or it can be sewn onto the product using copper wire sewing thread. This copper wire sewing thread forms an external sewing antenna 6 for the RFID resonant cavity assembly, enabling the size tag to have a longer RFID transmission distance. Specifically, the washable label fabric 5 is sewn onto the product using copper wire sewing thread, and the copper wire sewing thread is coupled to the external RFID antenna coupling position 2-2 of the RFID resonant cavity assembly, allowing the copper wire sewing thread to couple with the RFID resonant cavity assembly to form a long-distance transmission RFID tag.

[0047] like Figure 4 As shown, copper wire sewing thread is formed by twisting bare copper wire and sewing thread together. The diameter of the sewing thread is 0.12 mm, and the diameter of the bare copper wire is 0.06 mm to 0.07 mm. Its circuit strength per meter is less than 7.5 ohms, ensuring better toughness. When sewing with traditional sewing thread, the radio frequency distance of a small size label is approximately 0.5 meters. After sewing with copper wire sewing thread, the radio frequency distance of the small size label is approximately 7 meters or more.

[0048] When long-distance radio frequency transmission is required, copper wire sewing thread can be used instead of ordinary sewing thread to sew and fix the radio frequency functional tag. The length of the copper wire sewing thread is determined to be between 80 mm and 85 mm, which becomes the antenna fin of the radio frequency functional tag. The reading distance of the radio frequency functional tag can reach more than 7 meters.

[0049] This utility model of a radio frequency functional size tag for footwear and apparel has the following functional features:

[0050] (1) In addition to the traditional size label function, each piece of clothing, shoes, handbags, backpacks, linens, home textiles, etc. is equipped with an RFID chip. The RFID chip is used to record the product's brand, model, size, color, left-hand shoe, right-hand shoe, production date, sales region and other information. It can also be equipped with a unique serial number for each item, which can realize full tracking from production, warehousing, logistics to sales and provide traceability services.

[0051] (2) This utility model can also extend the radio frequency identification distance by using copper wire sewing thread. Because of its small size, the radio frequency size tag has a radio frequency reading distance of only 0.5 meters, which meets the identification needs of production lines, sorting lines, and packaging lines, and also meets the identification needs of the sales process. By using copper wire sewing thread to sew the radio frequency size tag onto the edge of clothing, shoes, handbags, backpacks, linens, and home textiles, it becomes a copper wire sewing thread UHF antenna, and is coupled close to the external radio frequency antenna of the size tag, thus coupling with the radio frequency size tag to form a long-distance identification radio frequency tag, extending the reading distance to more than 7 meters.

[0052] Compared with traditional RFID clothing tags, the RFID-enabled size tag for footwear and apparel has the following advantages:

[0053] (1) Low manufacturing cost: Since the size label has the smallest area compared to other clothing labels, its manufacturing cost is low.

[0054] (2) Low cost of use: This utility model only requires writing information to the radio frequency chip of the size label on the garment production line, without surface printing, saving the cost of RFID printer and printing.

[0055] (3) No increase in manpower and no impact on production efficiency: Sewing and installing small size labels is the existing standard production process in the footwear and apparel industry, which does not require manual operation of printing and pasting (hanging) of RFID tags for clothing.

[0056] This utility model of size tags can be applied to textiles, shoes, clothing, backpacks, handbags, carpets, towels, hotel linens, bedding, and fabric toys, and has a wide range of applications.

[0057] 1. Footwear industry

[0058] (1) Various shoes with a slanted tongue: A hot press head is used to press an adhesive radio frequency size tag on the inside of the shoe tongue. The size tag is bonded to the shoe tongue fabric by heating and pressurizing. After cooling, the hot melt resin turns into a solid state, and the radio frequency function tag is fixed on the inside of the shoe tongue. This structure can be applied to sports shoes, cotton shoes, leather shoes, etc.

[0059] During the information recognition process: the text symbols on the size tag are for human visual and scanner recognition; the RFID chip on the size tag on the shoe tongue is for RFID reader recognition. Without opening the shoe box, the shoe model, size, color, left or right shoe can be quickly identified, avoiding errors when the shoes are packed and making it easy to quickly find the required size and color of shoes.

[0060] (2) Fashion shoes and women's shoes without a tongue: A small radio frequency function size label can be pasted on the fabric inside the side of the shoe.

[0061] (3) Sandals and sports shoes with cloth handles on the heel: attach a small radio frequency size label to the inner layer of the cloth handle on the heel.

[0062] 2. Garment industry

[0063] (1) Fixed RFID size tags on the hem of T-shirts or shirts and waistbands: Fixed RFID size tags are placed on the inside of the hem of shirts or T-shirts, or on the waistbands. The adhesive size tags are pressed down with a pressure head and heated. After the hot-melt resin of the tags cools, the RFID tags are fixed onto the garment. This structure can be used in multi-station workflows in garment production, including assembly lines, sorting lines, and packaging lines, to identify information, write new information, identify errors, report errors, and correct errors, thereby improving production efficiency.

[0064] (2) Sewing on small size tags with radio frequency function:

[0065] Single or double-layered size tags are sewn onto designated locations on garments, or sewn onto the garment along with other tags. Copper wire sewing thread is used instead of ordinary sewing thread. The sewing path of the copper wire becomes a super-high frequency antenna, coupling with the small size tag (RF resonant cavity assembly) to form a long-range RFID tag. This structure can replace widely used paper and fabric RFID garment tags, offering advantages such as washability and ironing resistance. It is used for automatic identification and error correction at various stages of garment production, packaging, warehousing, automated inventory management, and sales collection. Furthermore, it automatically identifies items during the washing process, providing information tracking throughout the entire garment manufacturing process.

[0066] 3. Handbag and backpack industry

[0067] (1) A small radio frequency size tag is installed inside the handbag with heating and pressurization, and is fixed on the inside of the handbag or backpack.

[0068] (2) Sewn onto the outside or inside of handbags and backpacks: A single-layer fabric RFID size tag is sewn onto the side of the handbag or backpack, exposing the RFID resonant cavity assembly to indicate that it is a branded product with an RFID chip. Choosing a customized brand logo chip elevates the anti-counterfeiting resources of the handbag from printing and packaging processes to a customized brand logo chip, becoming an insurmountable barrier against counterfeiting. The RFID size tag sewn onto the outside of the handbag has the function of distinguishing authenticity at a glance. To counterfeit a branded handbag, one must imitate the brand logo chip. The chip manufacturing technology and investment make counterfeiters give up.

[0069] 4. Hotel linen industry

[0070] Size tags made of double-layered washable label fabric are sewn onto the edges of sheets, pillowcases, and towels, making them washable and iron-resistant. Each piece of linen has an RFID chip that records its model and size, as well as the owner's code and serial number. This information is used for automatic identification and statistics during laundry washing and sorting, for automatic identification and statistics of received linens in hotels, and for warehousing and distribution management.

[0071] 5. Home textile industry

[0072] Size tags made of single or double-layered washable label fabric are sewn onto the edges of bed sheets, mosquito nets, curtains, blankets, pajamas, bath towels, and hand towels. Each piece of home textile is equipped with a chip for automatic identification.

[0073] 6. Cloth Packaging Industry

[0074] Small size tags are sewn onto the tension straps of ton bags, express and postal container bags, and tobacco leaf bundling straps using copper wire, creating a coupled remote radio frequency tag. This gives each cloth packaging bag an RFID chip. In addition to the code of the cloth packaging bag, the RFID chip also provides information storage space and information communication channels for companies using cloth packaging bags, the transportation industry, and the logistics industry. This promotes the improvement of information management levels in industries related to cloth packaging, such as the building materials industry, the tobacco industry, the express and postal industry, and the transportation industry, achieving the goals of reducing personnel, lowering costs, increasing efficiency, and achieving zero errors.

[0075] This utility model has the following technological contributions when applied to the footwear, clothing, handbag, and home textile industries:

[0076] 1. The traditional size tags in the footwear, apparel, handbag, linen, and home textile industries can be upgraded to size tags with radio frequency (RFID) functionality: (1) More information beyond model and size can be recorded via RFID chips (such as manufacturer information, product production, warehousing information, and product circulation information). (2) RFID resolution can reach 0.5 meters, making it less prone to cross-reading and facilitating transmission lines, sorting lines, and automatic identification and error correction. (3) RFID has strong penetration capabilities, allowing identification of shoe and apparel models and sizes without opening the outer packaging, thus improving the efficiency of warehousing, logistics, and sales. (4) It provides full-process tracking services for the current footwear and apparel industry.

[0077] 2. The small size label is water-resistant, high-temperature resistant, fold-resistant, and iron-resistant, and has a wide range of applications.

[0078] 3. Small size tags have low production costs and are the lowest priced RFID tags.

[0079] 4. Size tags are easy and quick to install on shoes and clothing.

[0080] 5. The size tag has excellent anti-counterfeiting features. The RFID chip stores various relevant product information, facilitating full-process tracking and enhancing anti-counterfeiting capabilities. Furthermore, using a customized "brand identification chip" elevates the anti-counterfeiting platform to the chip manufacturing process. The RFID-enabled size tag is installed on the outer side of shoes, apparel, and handbags, showcasing a unique RFID resonant cavity and chip, making it instantly identifiable as genuine.

[0081] 6. After the size tag application is expanded, the reading distance is increased to 7 meters, which meets the requirements of automatic identification, positioning and quick query and retrieval of goods in the warehouse.

Claims

1. A small size tag with radio frequency function for footwear and apparel, characterized in that, include: A radio frequency (RF) resonant cavity assembly, wherein the outer edge dimension of the RF resonant cavity assembly is less than 20 mm × 20 mm, the RF resonant cavity assembly includes a PET substrate film layer, an aluminum foil resonant cavity, and an RF chip. The aluminum foil resonant cavity is disposed on the surface of the PET substrate film layer. The RF chip is flip-encapsulated in the aluminum foil resonant cavity via conductive resin at the aluminum foil chip mounting position, such that the equivalent capacitance inside the RF chip is connected in series with the equivalent inductance of the aluminum foil resonant cavity to form a series resonance. A high-temperature resin layer is disposed on the surface of the radio frequency resonant cavity assembly, and the radio frequency resonant cavity assembly is mounted on the product through the high-temperature resin layer; or, the radio frequency resonant cavity assembly is mounted on a washable label cloth through the high-temperature resin layer, and the washable label cloth is sewn onto the product.

2. The RFID-enabled size tag for footwear and apparel according to claim 1, characterized in that, The aluminum foil resonant cavity is formed by etching aluminum foil on the surface of the PET substrate film layer. The aluminum foil resonant cavity is annular with an opening, and the radio frequency chip is mounted at the opening.

3. The footwear and apparel industry radio frequency functional size tag according to claim 1, characterized in that, The high-temperature resin layer is solidified on the front side of the radio frequency resonant cavity assembly at high temperature, and the back side of the PET substrate film layer in the radio frequency resonant cavity is printed with label information.

4. The RFID-enabled size tag for footwear and apparel according to claim 1, characterized in that, The radio frequency resonant cavity assembly is fixed to the front side of the washable label cloth through the high-temperature resin layer, and the label information is printed on the back side of the washable label cloth.

5. The RFID-enabled size tag for footwear and apparel according to claim 1, characterized in that, The radio frequency resonant cavity assembly is fixed to one end position near the washable label cloth through the high temperature resin layer. The opposite end of the washable label cloth is provided with a sewing position for the washable label cloth, and the washable label cloth is sewn onto the product through the sewing position of the washable label cloth.

6. The footwear and apparel industry radio frequency functional size tag according to claim 5, characterized in that, The washable label cloth is 25-30 mm long and 20 mm wide.

7. The RFID-enabled size tag for footwear and apparel according to claim 1, characterized in that, The radio frequency resonant cavity assembly is fixed to one end position near the washable label cloth through the high temperature resin layer. Both this end position and the opposite end position of the washable label cloth are provided with sewing positions for the washable label cloth, so that when the washable label cloth is folded in half, the two sewing positions of the washable label cloth overlap each other, and the washable label cloth is sewn onto the product through the overlapping position.

8. The RFID-enabled size tag for footwear and apparel according to claim 7, characterized in that, The washable label cloth is 50-60 mm long and 20 mm wide.

9. The RFID-enabled size tag for footwear and apparel according to claim 1, characterized in that, The washable label fabric is sewn onto the product using copper wire sewing thread, and the copper wire sewing thread is coupled to the external radio frequency antenna of the radio frequency resonant cavity assembly, so that the copper wire sewing thread and the radio frequency resonant cavity assembly are coupled to form a long-distance transmission radio frequency tag.

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