RFID Label Adhesive Segmentation for Curved Medical Devices
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Solution Overview
Problem
Conventional RFID tags attached to curved surfaces tend to peel off over time, posing a challenge for maintaining long-term attachment to medical devices like blood collection tubes.
Innovation Solution
An RFID label design featuring a label body with a first adhesive layer and a second adhesive layer, where the first adhesive layer has an intermediate portion and an outer peripheral portion, ensuring secure attachment to the medical device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional RFID tag is attached to a curved surface through adhesive, then the RFID tag can be attached to the adherend, but the RFID tag peels off over time and cannot maintain attachment for a long time
Solution Approach 1:
The adhesive layer is divided into multiple functional regions: a first adhesive region extending beyond the RFID inlay boundaries and a second adhesive region within the RFID inlay boundaries. This segmentation allows the outer peripheral portion to provide robust edge anchoring while the intermediate portion ensures continuous adhesive coverage, preventing peeling at the vulnerable edges of curved surfaces.
Solution Approach 2:
Different regions of the adhesive layer are assigned different functional qualities: the outer peripheral portion provides strong mechanical anchoring at the edges, while the intermediate portion ensures continuous bonding coverage. This local differentiation of adhesive function optimizes attachment performance specifically for curved surfaces where edge peeling is the primary failure mode.
2Ease of manufacture
If the adhesive layer is reduced to minimize material usage, then manufacturing cost decreases, but attachment reliability on curved surfaces deteriorates
Solution Approach 1:
The adhesive layer is applied excessively at the outer peripheral region where it extends beyond the RFID inlay boundaries, while maintaining minimal coverage at the center. This partial excessive action concentrates adhesive material at the critical edge regions where peeling forces are highest, achieving reliable curved surface attachment with optimized material distribution.
Solution Approach 2:
The adhesive layer exhibits local quality variation with higher concentration at the outer peripheral portion and reduced concentration toward the center. This localized adhesive distribution matches the stress distribution on curved surfaces, providing enhanced attachment reliability at peeling-prone edges while minimizing overall material usage.
Data Source
AI summary
An RFID label for a medical device according to the present invention is an RFID label for a medical device to be attached to the medical device, the RFID label including a label body having a first surface on which printing is possible and a second surface; a first adhesive layer provided on the second surface of the label body; an RFID inlay including a base film having a first surface attached to the second surface of the label body through the first adhesive layer and a second surface on an opposite side of the first surface, and having an area smaller than that of the label body, an antenna, and an IC chip; and a second adhesive layer provided on the second surface of the base film, wherein the first adhesive layer has an intermediate portion arranged between the label body and the base film, and an outer peripheral portion surrounding an outer periphery of the base film, and a label attachment surface is formed by a surface of the outer peripheral portion of the first adhesive layer on an opposite side of the label body and a surface of the second adhesive layer on the opposite side of the label body.