UHF RFID linen label with enhanced washability

Abstract

The utility model relates to the technical field of electronic tags, in particular to a UHF (Ultra High Frequency) RFID (Radio Frequency Identification Device) linen tag with enhanced washability, which is characterized in that a near-field module is arranged on a base material, far-field antennas are arranged on two sides of the near-field module, and the near-field module is arranged in a circular coupling area formed in the middle of the far-field antennas and is not in contact with the near-field module; the near-field module is completely covered by the glue dripping layer, the thickness of the glue dripping layer is 1.5 mm-2mm, and the coverage range of the glue dripping layer is within a circular coupling area formed in the middle of the far-field antenna. The near-field module is completely covered by the glue dripping layer with a certain thickness formed by the glue dripping material with high peel strength and temperature resistance range, so that the invasion of water vapor and chemical substances is isolated, the position stability and the performance stability of the near-field module on the base material are protected, and the requirement of repeated washing in a complex environment is further met.

Description

Technical Field

[0001] This utility model relates to the field of electronic tag technology, specifically a UHF RFID linen tag with enhanced washability. Background Technology

[0002] "Linen" is a general term used in hotels, guesthouses, hospitals, and other similar establishments to refer to textiles such as towels, sheets, duvet covers, and pillowcases. "Linen tag" refers to the tag used to identify linen. "UHF RFID" is ultra-high frequency radio frequency identification technology. It operates in the ultra-high frequency range and features long-range identification, high data transmission speed, and the ability to identify multiple tags simultaneously.

[0003] However, existing UHF RFID linen tags may suffer structural damage such as near-field module displacement and material deformation during repeated washing in complex washing environments (such as high temperature, high pressure, and strong chemical washing), which affects their structural stability and reading effectiveness.

[0004] Based on the above reasons, this utility model designs a UHF RFID linen tag with enhanced washability. By improving the overall material and adjusting the structure of the linen tag, the structural strength and stability in complex washing environments are achieved, ensuring the normal and repeated use of the UHF RFID linen tag. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a UHF RFID linen tag with enhanced wash resistance. By improving the overall material and adjusting the structure of the linen tag, the structural strength and stability in complex washing environments are achieved, ensuring the normal and repeated use of the UHF RFID linen tag.

[0006] To achieve the above objectives, this utility model provides a UHF RFID linen tag with enhanced washability, comprising a substrate, a near-field module disposed on the substrate, far-field antennas disposed on both sides of the near-field module, the near-field module being disposed within a circular coupling area formed in the middle of the far-field antennas and not in contact with the near-field antennas, the near-field module being completely covered by an adhesive layer with a thickness of 1.5mm to 2mm, the coverage area of ​​the adhesive layer being within the circular coupling area formed in the middle of the far-field antennas.

[0007] The far-field antennas are symmetrically distributed on both sides of the near-field module.

[0008] The substrate is a cloth-based substrate.

[0009] The epoxy resin layer is formed by epoxy resin with a peel strength ≥8N / cm and a temperature resistance range of -40℃ to 190℃.

[0010] The epoxy layer is formed by hot melt adhesive epoxy modified polyurethane epoxy.

[0011] The near-field module includes a UHF chip.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This invention uses a flexible material as the substrate and employs a combination of sewing jacquard and hot-pressing processes to firmly embed the far-field antenna into the substrate, maintaining its position and shape. Simultaneously, the near-field module is fixed to the center of the far-field antenna using a 0.2mm precision adhesive application. A high-peel-strength and high-temperature-resistant adhesive layer of a certain thickness completely covers the near-field module, preventing the intrusion of moisture and chemicals. This protects the near-field module, ensuring its stable position and performance on the substrate, and thus meeting the requirements for repeated washing in complex environments. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Explanation of reference numerals in the attached figures:

[0016] 1: Far-field antenna, 2: Near-field module, 3: Epoxy layer, 4: Substrate. Detailed Implementation

[0017] The present invention will now be further described with reference to the accompanying drawings:

[0018] See Figure 1 This utility model provides a UHF RFID linen tag with enhanced washability, including a substrate 4, on which a near-field module 2 containing a UHF chip is disposed. Far-field antennas 1 are disposed on both sides of the near-field module 2. The near-field module 2 is disposed within a circular coupling area formed in the middle of the far-field antennas 1 and is not in contact with the far-field antennas 1. The near-field module 2 is completely covered by an adhesive layer 3 with a thickness of 1.5mm to 2mm. The coverage area of ​​the adhesive layer 3 is within the circular coupling area formed in the middle of the far-field antennas 1.

[0019] The far-field antenna 1 is symmetrically distributed on both sides of the near-field module 2.

[0020] Substrate 4 is a cloth-based substrate.

[0021] The epoxy layer 3 is an epoxy layer formed by epoxy resin with a peel strength ≥8N / cm and a temperature resistance range of -40℃ to 190℃.

[0022] Layer 3 is a layer of adhesive formed by hot melt adhesive-modified polyurethane adhesive.

[0023] Working principle:

[0024] This invention requires minimal adjustment during use. Traditional fabrics or other soft materials are selected as the substrate. Hot melt adhesive or modified polyurethane adhesive is used, but the adhesive material must be resistant to detergent corrosion at pH 3-12 and maintain structural stability at 190℃ after curing. During fabrication, the far-field antenna 1 is first embedded into the substrate 4 using a jacquard stitching and hot-pressing process. A dispensing machine is used to place the near-field module 2 within the circle formed in the center of the far-field antenna 1 with a precision of 0.2mm. Then, adhesive is applied to cover the circle in the center of the far-field antenna 1, completely covering the near-field module 2 and forming a sealing layer with a thickness of 1.5mm-2mm to isolate moisture and chemicals.

[0025] According to ISO 6330 standard, the wash resistance test of this label is as follows:

[0026] After 200 consecutive washes at 95℃ and 1.5MPa water pressure, the label reading success rate is ≥99%.

[0027] When soaked in an alkaline detergent at pH 12 for 48 hours, the signal intensity attenuation rate is <5%.

[0028] The near-field module displacement is less than 0.1mm, which is much lower than the displacement of traditional labels.

[0029] Under industrial drying conditions at 120℃, the labels showed no warping or delamination, and the chip operating frequency remained stable at 860-960MHz.

[0030] The above are merely preferred embodiments of this utility model, intended only to aid in understanding the method and core concept of this application. The scope of protection of this utility model is not limited to the above embodiments; all technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the scope of protection of this utility model.

[0031] This invention comprehensively solves the shortcomings of existing UHF RFID linen tags in complex washing environments (such as high temperature, high pressure, and strong chemical washing) where near-field module displacement and material deformation occur during repeated washing, leading to structural damage. By using a special epoxy layer to completely cover and isolate the near-field module, it protects it from detergent corrosion with pH values ​​of 3-12 and temperatures above 190°C. This results in low displacement, low signal strength attenuation, and high read success rate. The structure is free of warping or delamination, and the chip operates stably at 860-960MHz, maintaining a read rate of over 98% even after hundreds of washes. Furthermore, its cost is controllable, and its manufacturing is convenient. This invention provides assistance for precise management in high-frequency washing scenarios such as medical facilities and hotels, and also possesses significant commercial value.

Claims

1. A UHF RFID linen tag with enhanced wash resistance, comprising a substrate (4), characterized in that, A near-field module (2) is provided on the substrate (4), and far-field antennas (1) are provided on both sides of the near-field module (2). The near-field module (2) is located in the circular coupling area formed in the middle of the far-field antenna (1) and has no contact with the near-field module (2). The near-field module (2) is completely covered by an adhesive layer (3). The thickness of the adhesive layer (3) is 1.5mm to 2mm, and the coverage area of ​​the adhesive layer (3) is the circular coupling area formed in the middle of the far-field antenna (1).

2. The UHF RFID linen tag with enhanced wash resistance according to claim 1, characterized in that, The far-field antenna (1) is symmetrically distributed on both sides of the near-field module (2).

3. The UHF RFID linen tag with enhanced wash resistance according to claim 1, characterized in that, The substrate (4) is a cloth-based substrate.

4. The UHF RFID linen tag with enhanced wash resistance according to claim 1, characterized in that, The epoxy layer (3) is an epoxy layer formed by epoxy resin with a peel strength ≥8N / cm and a temperature resistance range of -40℃ to 190℃.

5. The UHF RFID linen tag with enhanced wash resistance according to claim 4, characterized in that, The epoxy layer (3) is an epoxy layer formed by hot melt adhesive epoxy modified polyurethane epoxy.

6. The UHF RFID linen tag with enhanced wash resistance according to claim 1, characterized in that, The near-field module (2) includes a UHF chip.

Images