Water-Resistant Flexible Sensor Tags with Conductive Ink for Discreet RFID
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing RFID tags for textiles are visible, easily removable, and costly, failing to meet the needs of retail logistics for discreet, durable, and cost-effective theft prevention.
Innovation Solution
A thin, flexible, and highly water-resistant sensor tag with a polymer substrate and conductive ink antenna, encapsulated in a TPU coating, integrated into textiles to provide a discreet and durable RFID solution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RFID tags are made visible and easily removable for theft prevention, then theft detection capability is improved, but the tag becomes easily detectable and removable by thieves
Solution Approach 1:
The patent applies conductive ink printing to create RFID tags that are visually indistinguishable from the textile fabric, making them undetectable to the human eye while maintaining full RFID functionality for theft detection
Solution Approach 2:
The patent creates a visual copy of the fabric texture and pattern using conductive ink that replicates the fabric's appearance, allowing the RFID tag to blend seamlessly with the textile material
2Strength
If RFID tags are integrated into textiles using thick coated wires for physical strength, then structural integrity is improved, but the thread becomes felt and visible
Solution Approach 1:
The patent uses conductive ink that matches the fabric color and texture, creating a visually invisible antenna that provides sufficient electrical conductivity without the need for thick coated wires
Solution Approach 2:
The patent replaces mechanical wire structures with printed conductive ink patterns, eliminating the need for thick physical coatings while maintaining electrical functionality and reducing visibility
3Difficulty of detecting and measuring
If RFID tags are made thin and flexible for discreet integration, then aesthetic appearance is improved, but water resistance and durability are reduced
Solution Approach 1:
The patent uses a thin flexible substrate that can be integrated into textiles while providing a protective barrier for the RFID components, maintaining both flexibility and environmental protection
Solution Approach 2:
The patent combines multiple material layers including flexible substrate, conductive ink, and protective coatings to create a composite structure that provides both thin flexible integration and water resistance
4Reliability
If RFID tags are made permanent and water-resistant for garment integration, then durability is improved, but the tag becomes more complex and costly
Solution Approach 1:
The patent combines the RFID antenna, substrate, and protective coating into a single integrated printing process, eliminating the need for separate assembly steps and reducing overall complexity
Solution Approach 2:
The patent uses a self-adhering flexible substrate that bonds automatically to the garment material without requiring additional fastening mechanisms or complex attachment processes
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A method for configuring a sensor tag includes printing one or more antennas on a flexible substrate layer using a conductive ink; depositing one or more sensors on the flexible substrate layer, where at least one of the one or more sensors is deposited to make electric contact with at least one of the one or more antennas; and applying a coating layer over the one or more sensors.