A thin, flexible, waterproof, washable label in the UHF band

Abstract

The application relates to the radio frequency identification technical field and discloses a UHF frequency band thin type soft waterproof wash-resistant label, which comprises, from top to bottom, a top waterproof film, an antenna layer, a chip, a base layer flexible plate and a bottom waterproof film which are sequentially stacked, the antenna layer is printed on the upper surface of the base layer flexible plate, and the chip is electrically connected with the antenna layer through conductive glue.In the utility model, through the optimized combination of the layer structures, the top waterproof film and the bottom waterproof film form a double waterproof barrier, the gap filling and the edge hot press sealing of the flexible waterproof adhesive layer are matched, a complete waterproof system is constructed, the flexible material of the base layer flexible plate and the waterproof film is matched, the label is good in softness, has no obvious foreign body sensation when being attached to textiles, the antenna layer and the base layer flexible plate are tightly combined through a printing process, the layers are firmly bonded through the flexible waterproof adhesive layer, and it is ensured that the label can still maintain a complete structure and stable radio frequency identification function after multiple washing, rubbing and other operations.

Description

Technical Field

[0001] This application relates to the field of radio frequency identification technology, and in particular to a thin, flexible, waterproof, and wash-resistant tag for the UHF band. Background Technology

[0002] With the popularization of RFID technology, UHF band tags are widely used for item tracking and management due to their advantages such as long reading distance and fast identification speed. In scenarios such as clothing retail and hotel linen management, tags need to be attached to textiles such as clothing and sheets and withstand frequent washing, drying and rubbing operations, which puts strict requirements on the tags' waterproofness, washability and physical flexibility. Existing UHF tags mostly use rigid substrates or single waterproof coatings, which have the following drawbacks: First, they are hard and heavy, which can cause a foreign body sensation when attached to textiles, affecting wearing or use comfort; second, the waterproof structure is not perfect, and water can easily penetrate into the internal chip and antenna connection during washing, causing short circuit failure; third, the wash resistance is insufficient, and the antenna layer is easy to fall off and the substrate is easy to be damaged after repeated washing, making it impossible to maintain long-term stable identification function. Therefore, a thin, flexible, waterproof, and wash-resistant UHF band tag is proposed to solve the above problems. Utility Model Content

[0003] The purpose of this invention is to provide a thin, flexible, waterproof, and wash-resistant label for the UHF band to solve the problems mentioned in the background art.

[0004] This application provides a thin, flexible, waterproof, and wash-resistant UHF band label using the following technical solution: A thin, flexible, waterproof, and washable label for the UHF band includes, from top to bottom, a top waterproof membrane, an antenna layer, a chip, a base flexible board, and a bottom waterproof membrane. The antenna layer is printed on the upper surface of the base flexible board. The chip is electrically connected to the antenna layer via conductive adhesive. The top waterproof membrane covers the upper surfaces of the antenna layer and the chip. The bottom waterproof membrane covers the lower surface of the base flexible board, and the edges of the top and bottom waterproof membranes are sealed together by heat pressing. Flexible waterproof adhesive layers are provided between the top waterproof membrane and the antenna layer, and between the bottom waterproof membrane and the base flexible board.

[0005] Preferably, both the top and bottom waterproof membranes are made of polyimide waterproof membranes with a thickness of 10-30 μm, and the surfaces are coated with a fluorocarbon waterproof coating.

[0006] Preferably, the base flexible plate is a polyester film with a thickness of 20-50μm, and its surface is treated with corona.

[0007] Preferably, the antenna layer is made by printing with silver paste, has a thickness of 5-15μm, has a dipole-type antenna pattern, and operates in the frequency band of 860-960MHz.

[0008] Preferably, the flexible waterproof adhesive layer is a modified acrylic waterproof adhesive with a thickness of 5-10 μm.

[0009] Preferably, the chip is a UHF band passive chip with a size no larger than 3mm × 3mm and a reading distance of no less than 3m.

[0010] In summary, this application includes the following beneficial technical effects: Through the optimized combination of each layer, the top and bottom waterproof membranes form a double waterproof barrier. Combined with the gap filling of the flexible waterproof adhesive layer and the edge heat-sealing, a complete waterproof system is constructed. The flexible material of the base flexible board and the waterproof membrane gives the label good flexibility, and there is no obvious foreign body feeling when it is attached to textiles. The antenna layer and the base flexible board are tightly bonded through the printing process. Each layer is firmly bonded by the flexible waterproof adhesive layer, ensuring that the label can still maintain structural integrity and stable radio frequency identification function after multiple washing, rubbing and other operations. Attached Figure Description

[0011] Figure 1 This is an overall schematic diagram of an embodiment of the application; Figure 2 This is a first exploded view of an embodiment of the application; Figure 3 This is a second exploded diagram of an embodiment of the application.

[0012] Explanation of reference numerals in the attached diagram: 1. Top waterproof membrane; 2. Antenna layer; 3. Chip; 4. Base flexible board; 5. Bottom waterproof membrane; 6. Flexible waterproof adhesive layer. Detailed Implementation

[0013] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0014] This application discloses a thin, flexible, waterproof, and washable label for the UHF band. (See also...) Figure 1-3 A thin, flexible, waterproof, and washable label for the UHF band includes a top waterproof membrane 1, an antenna layer 2, a chip 3, a base flexible board 4, and a bottom waterproof membrane 5 stacked from top to bottom. A flexible waterproof adhesive layer 6 is provided between the top waterproof membrane 1 and the antenna layer 2, and between the bottom waterproof membrane 5 and the base flexible board 4.

[0015] Reference Figure 3As shown, the base flexible board 4 serves as the basic support structure for the tag. The antenna layer 2 is printed on the upper surface of the base flexible board 4 to achieve a tight bond between the two. Then, conductive adhesive is used to bond the chip 3 to the preset feed point position of the antenna layer 2. After the conductive adhesive cures, a stable electrical connection path is formed to ensure smooth signal transmission between the chip 3 and the antenna layer 2.

[0016] Reference Figure 2 As shown, the top waterproof membrane 1 completely covers the upper surface of the antenna layer 2 and the chip 3, and the bottom waterproof membrane 5 covers the lower surface of the base flexible plate 4. Before covering, a flexible waterproof adhesive layer 6 has been applied between the top waterproof membrane 1 and the antenna layer 2, and between the bottom waterproof membrane 5 and the base flexible plate 4. The adhesive layer evenly fills the gaps between each layer. Finally, the edges of the top waterproof membrane 1 and the bottom waterproof membrane 5 are heat-sealed to form a gapless connection and build a fully enclosed protective structure.

[0017] In this embodiment, the top waterproof membrane 1 and the bottom waterproof membrane 5 are selected as polyimide waterproof membranes, and a fluorocarbon waterproof coating is uniformly coated on their surface. The polyimide material itself has good chemical corrosion resistance and mechanical strength. Combined with the low surface energy characteristics of the fluorocarbon waterproof coating, it can effectively repel liquids such as water and detergents. The dual protective structure further enhances the waterproof performance of the label.

[0018] The base flexible board 4 is made of polyester film, and its surface is treated with corona before use. Corona treatment increases the surface roughness and active groups by bombarding the film surface with high-energy particles, which significantly improves the adhesion of silver paste when printing the antenna layer 2. At the same time, the flexible properties of the polyester film itself also ensure the overall flexibility of the label.

[0019] Antenna layer 2 is fabricated using a silver paste printing process. During the printing process, it is coated according to a pre-set dipole-type structural pattern to ensure that the antenna's radiation characteristics meet the design standards. The finished antenna layer operates in the UHF general frequency band, enabling long-distance reception and transmission of radio frequency signals.

[0020] The flexible waterproof adhesive layer 6 is made of modified acrylic waterproof adhesive. When the adhesive layer is applied, it forms a uniform film that can not only firmly bond the top waterproof membrane 1 to the antenna layer 2 and the bottom waterproof membrane 5 to the base flexible board 4 to prevent the layers from separating, but also fill the tiny gaps between the components and block the path of water penetration.

[0021] Chip 3 is a UHF band passive chip that can operate by receiving radio frequency energy through an antenna without the need for a built-in power supply. The chip is small in size and has a reading distance of no less than 3 meters, which can meet the needs of batch rapid identification in scenarios such as clothing and home textiles.

[0022] The implementation principle of a thin, flexible, waterproof, and wash-resistant UHF band tag in this application embodiment is as follows: The tag adopts a passive working mode, and its core function relies on the synergistic effect of the chip and the antenna layer. When the tag enters the radio frequency field range of the UHF band (860-960MHz) reader, the radio frequency signal emitted by the reader is received by the dipole-type antenna layer 2. The antenna layer 2 converts the received electromagnetic energy into electrical energy to power the UHF band passive chip 3, thereby activating the chip 3 from its dormant state. After activation, the chip 3 establishes a communication link with the reader through the antenna layer 2. The built-in storage unit of the chip 3 can store data such as item identification and traceability. Under the command control of the reader, the chip 3 modulates the stored data into radio frequency signals and then transmits them back to the reader through the antenna layer 2. The reader demodulates and decodes the received signals to obtain the information in the tag and realize the long-distance identification function. The base flexible board 4 uses a polyester film treated with corona. Its excellent flexibility allows the label to bend with the deformation of the textile, avoiding structural damage that could affect the antenna shape. At the same time, the corona treatment enhances the adhesion between the antenna layer 2 and the base flexible board 4, ensuring that the silver paste antenna will not fall off or deform during rubbing and washing, maintaining the antenna's resonant frequency in the UHF working band, and ensuring signal transmission efficiency. The top waterproof membrane 1 and the bottom waterproof membrane 5 form a double physical barrier, directly blocking the intrusion of liquids such as water and detergents. The two waterproof membranes are bonded to the middle structure through a flexible waterproof adhesive layer 6. The adhesive layer fills the tiny gaps between the components, eliminating liquid penetration channels. Combined with the edge hot pressing or waterproof adhesive sealing connection, a fully enclosed sealed structure is constructed, keeping the chip 3 and antenna layer 2 in a dry environment to avoid circuit short circuit failure. The flexible waterproof adhesive layer 6 has high and low temperature resistance from -40℃ to 80℃, which can adapt to temperature changes during washing and drying, and it is firmly bonded to each component. The silver paste material of the antenna layer 2 itself has a certain degree of chemical corrosion resistance. Combined with the isolation effect of the waterproof membrane, it can resist the erosion of detergents. The overall tensile strength of the label is not less than 20MPa, which can withstand the mechanical tension during washing, ensuring that the structure of each layer does not separate, thereby maintaining the long-term stability of the radio frequency identification function. In scenarios involving frequent washing of clothing and home textiles, the label must simultaneously withstand liquid immersion, temperature fluctuations, and mechanical forces. Through the barrier of a double-layer waterproof membrane, the sealing of a waterproof adhesive layer, and the buffering of a flexible substrate, the internal circuitry of the label remains in a stable physical and chemical environment. The reliable connection between antenna layer 2 and chip 3, as well as the stability of the antenna structure, ensure that the reception and transmission efficiency of radio frequency signals are not affected by the environment. Even after multiple standard washing processes or immersion in 80°C hot water, the label can still maintain its complete structure and normal energy conversion and signal transmission functions, enabling continuous identification and tracking of items.

[0023] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other. Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A thin, flexible, waterproof, and wash-resistant label for the UHF band, characterized in that: The device comprises, from top to bottom, a top waterproof membrane (1), an antenna layer (2), a chip (3), a base flexible board (4), and a bottom waterproof membrane (5). The antenna layer (2) is printed on the upper surface of the base flexible board (4). The chip (3) is electrically connected to the antenna layer (2) through conductive adhesive. The top waterproof membrane (1) covers the upper surfaces of the antenna layer (2) and the chip (3). The bottom waterproof membrane (5) covers the lower surface of the base flexible board (4). The edges of the top waterproof membrane (1) and the bottom waterproof membrane (5) are sealed by heat pressing. Flexible waterproof adhesive layers (6) are provided between the top waterproof membrane (1) and the antenna layer (2) and between the bottom waterproof membrane (5) and the base flexible board (4).

2. The UHF band thin, flexible, waterproof, and washable label according to claim 1, characterized in that: Both the top waterproof membrane (1) and the bottom waterproof membrane (5) are made of polyimide waterproof membrane with a thickness of 10-30μm and are coated with fluorocarbon waterproof coating.

3. The UHF band thin, flexible, waterproof, and washable label according to claim 1, characterized in that: The base flexible plate (4) is a polyester film with a thickness of 20-50μm and its surface is treated with corona.

4. The UHF band thin, flexible, waterproof, and washable label according to claim 1, characterized in that: The antenna layer (2) is made by printing with silver paste, with a thickness of 5-15μm. The antenna pattern is a dipole-type structure, and the operating frequency band is 860-960MHz.

5. A thin, flexible, waterproof, and washable label for the UHF band according to claim 1, characterized in that: The flexible waterproof adhesive layer (6) is a modified acrylic waterproof adhesive with a thickness of 5-10 μm.

6. A thin, flexible, waterproof, and washable label for the UHF band according to claim 1, characterized in that: The chip (3) is a UHF band passive chip with a size of no more than 3mm×3mm and a reading distance of no less than 3m.

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