RFID Strap Webs with Release Liners for Antenna Connection
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Solution Overview
Problem
Existing RFID strap webs are inconvenient to use in their wide format, with residual adhesive on the conductive side, requiring separation before connection to antennas, and lack efficient methods for producing narrow webs with high antenna density.
Innovation Solution
A method involving a composite web structure with a carrier web and a conductive adhesive web, where the adhesive web is applied to the wide strap web, heated to adhere, and then slit into narrow webs, allowing for easy connection to antennas, and a process of forming antennas by cutting slots in a flexible metal web and applying patterned adhesives to create narrow antenna webs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wide strap webs are used with high strap density, then manufacturing efficiency is improved, but the residual adhesive on the conductive side causes connection problems with antennas
Solution Approach 1:
The patent extracts the adhesive from the conductive side of the strap by introducing a release liner between the adhesive and the conductive surface. This allows the adhesive to be applied to the strap during manufacturing while preventing it from bonding to subsequent layers, thereby eliminating the connection problem with antennas while maintaining high-density wide web manufacturing
Solution Approach 2:
The release liner acts as an intermediary layer between the adhesive on the strap and other components. It allows the adhesive to be applied and then easily released without contaminating the conductive side, enabling both high manufacturing efficiency and reliable antenna connection
2Reliability
If wide strap webs are co-wound with adhesive or conductive tape, then connectivity is improved, but the device complexity and processing difficulty increase
Solution Approach 1:
Instead of adding separate adhesive webs or conductive tapes, the patent extracts the necessary adhesive function by applying adhesive only to the back side of the strap with a release liner. This eliminates the need for separate adhesive layers while maintaining connectivity, thereby reducing device complexity
Solution Approach 2:
The adhesive layer on the back of the strap serves multiple functions: it provides mechanical support during handling and enables connection to antennas. By integrating these functions into a single layer rather than requiring separate adhesive webs or tapes, the overall system complexity is reduced
3Ease of operation
If narrow webs of straps are produced by cutting from wide webs, then ease of use is improved, but productivity and manufacturing efficiency decrease
Solution Approach 1:
The patent prepares the wide strap web in advance with adhesive applied to the back side and release liner in place. This preliminary preparation allows the wide web to be manufactured efficiently, and then it can be easily cut into narrow strips that are ready for immediate use without requiring additional adhesive application or processing steps
4Quantity of substance
If high density straps are arranged in parallel columns, then quantity of straps is improved, but residual adhesive creates harmful effects on the conductive side
Solution Approach 1:
The release liner extracts the adhesive from the conductive side by being positioned between the adhesive and the conductive surface. This allows high-density strap arrangement with adhesive on the back without the adhesive contaminating the conductive side, thereby eliminating the harmful effect while maintaining high quantity of straps
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient production of narrow RFID strap webs with improved connectivity to antennas, reducing waste and simplifying the manufacturing process, facilitating the creation of high-density antenna webs for RFID transponders.
Implementation Method 1
the adhesive web is applied to the wide strap web, heated to adhere
Implementation Method 2
moving the heated drums to bring the straps and the antenna web together to connect the straps to the antennas
Implementation Method 3
the adhesive coating containing electrically conductive particles
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
RFID transponder webs and intermediate webs such as RFID strap webs and antenna webs.