RFID Tag Filtering for Chip Recovery in Recycling Streams

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Solution Overview

Problem

Existing RFID devices are not recyclable, with the non-recyclable RFID chip contaminating recyclable materials and increasing costs due to disposal as non-recyclable waste, despite the desire for more sustainable practices.

Innovation Solution

Design of a recyclable RFID device with recoverable components, such as a RFID coupling strap encapsulated by a substrate, and a filtering system to separate and recover these components during recycling, using methods like magnetic or capacitive coupling to isolate and retrieve the RFID chip.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If RFID tags are attached to articles for identification and tracking, then the ability to identify and track articles is improved, but the RFID chip contaminates recyclable materials and increases disposal costs

Engineering Contradiction:

Improveidentification and tracking capabilityVSAvoidcontamination of recyclable materials

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The RFID system is divided into separate components: a permanent RFID tag attached to the article and a removable RFID reader head. The reader head can be detached and recycled separately from the article, preventing contamination of recyclable materials while maintaining tracking functionality.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The RFID reader head is designed to be removable and recyclable. After use, the reader head can be separated from the article and recovered for reuse or proper disposal, eliminating the problem of permanent contamination in the recycling stream.

Inventive Principle:

Principle #34Discarding and recovering

2Reliability

If RFID tags are permanently attached to articles, then tracking reliability is improved, but the tags cannot be recovered or reused

Engineering Contradiction:

Improvetracking continuityVSAvoidRFID chip reuse potential

Core Design Contradiction:

ReliabilityVSLoss of substance

Solution Approach 1:

The system separates the permanently attached RFID tag from the temporarily used RFID reader head. The tag remains with the article for continuous tracking, while the reader head can be recovered and reused for multiple articles, achieving both tracking reliability and resource recovery.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The RFID reader head is designed as a universal device that can read multiple RFID tags across different articles. This multi-functionality allows a single reader head to serve many articles throughout their lifecycle, maximizing reuse potential while maintaining tracking reliability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Ease of manufacture

If RFID devices use smaller form factors for flexibility and manufacturing efficiency, then manufacturing cost and flexibility are improved, but the devices become more difficult to separate and recover during recycling

Engineering Contradiction:

Improvemanufacturing efficiencyVSAvoidseparation and recovery difficulty

Core Design Contradiction:

Ease of manufactureVSDifficulty of detecting and measuring

Solution Approach 1:

By separating the RFID tag from the reader head, the system allows the larger, more easily detectable reader head to be recovered separately. The small RFID tag remains attached to the article but does not need to be recovered, thus avoiding the problem of difficult separation while maintaining manufacturing efficiency.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The RFID reader head acts as an intermediary device that interfaces with multiple small RFID tags. This intermediary approach allows the use of small, efficient tags for manufacturing while the larger reader head handles the complexity of interaction and can be recovered for reuse.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 the recovery and reuse of RFID chips, reducing contamination and costs by allowing recyclable components to be separated and reused, enhancing recycling efficiency and sustainability.

Implementation Method 1

using methods like magnetic or capacitive coupling to isolate and retrieve the RFID chip

Methodology Applied

Scientific EffectMagnetic coupling: Magnetic Field

Implementation Method 2

using methods like magnetic or capacitive coupling to isolate and retrieve the RFID chip

Methodology Applied

Scientific EffectCapacitive coupling: Capacitance

Data Source

PatentEP4081929B1Filtering systems for recycling RFID tags and methods of using thereof

Publication Date: 2026.03.04 AVERY DENNISON RETAIL INFORMATION SERVICES LLC

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Figure 3A~3B

AI summary

A recyclable RFID device having one or more recoverable components configured to remain substantially intact during a waste recycling process. The one or more recoverable components comprises a RFID coupling strap and a substrate encapsulating the RFID coupling strap. A filtering system for recovering the recyclable RFID device from a waste stream is also disclosed, and comprises a waste collection container, a RFID device detection unit, and a RFID device diversion area. Additionally, a filtering system for recovering the recyclable RFID device during a waste recycling process is disclosed. The filtering system enables separating the recyclable RFID device from a packaging and detecting the separated components of the recyclable RFID device including the one or more recoverable components. The separated components including the RFID chip is then diverted from the waste stream for reuse.