RFID Tag Cover Rubber Composition for Signal Range and Durability
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Solution Overview
Problem
Current RFID tags in tires face challenges in durability and radio wave recognition distance, which affects logistics and history management in the tire industry, as they are prone to physical and mechanical impacts and suffer from signal interference.
Innovation Solution
A rubber composition for electromagnetic tag covers is developed, comprising a base rubber, reinforcing filler (such as carbon black or boron nitride), and insulating filler (like silica, titanium dioxide, or calcium carbonate), providing a specific resistance of 107 Ω·m or more, which enhances durability and radio wave recognition efficiency by limiting electrical signal and radio wave emission to the tag's internal area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional rubber composition is used for electromagnetic tag cover, then the tag is protected from physical impacts, but radio wave recognition distance is limited due to signal interference
Solution Approach 1:
The patent changes the electrical resistance parameter of the rubber composition by adjusting the filler content. Specifically, it increases the specific resistance to 10^7 Ω·m or more by optimizing the ratio and amount of insulating fillers (silica, titanium dioxide, talc, or calcium carbonate) combined with reinforcing fillers (carbon black or boron nitride), thereby reducing signal interference and extending radio wave recognition distance
Solution Approach 2:
The patent uses a composite rubber composition combining multiple filler materials with different properties. The composition includes both reinforcing fillers (for mechanical strength) and insulating fillers (for electrical resistance), creating a multi-functional material that simultaneously provides physical protection and electromagnetic shielding
2Strength
If the cover material provides mechanical protection, then durability is improved, but electrical conductivity increases causing signal interference
Solution Approach 1:
The patent optimizes the electrical resistance parameter by controlling the filler composition and ratios. By increasing insulating filler content to achieve specific resistance of 10^7 Ω·m or more, it suppresses electrical signal interference while maintaining mechanical durability through the reinforcing filler network
Solution Approach 2:
The patent applies different filler types in specific combinations to achieve localized functional optimization. The reinforcing fillers (carbon black or boron nitride) provide mechanical strength, while insulating fillers (silica, titanium dioxide, talc, or calcium carbonate) are strategically combined to create zones of high electrical resistance that block signal interference
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
The rubber composition effectively protects the RFID tag from physical impacts, improves mechanical properties, and increases the radio wave recognition distance, leading to enhanced signal transmission and recognition efficiency, thereby improving tire logistics and history management.
Implementation Method 1
the rubber composition for electromagnetic tag cover includes a base rubber, a reinforcing filler and an insulating filler, and has a specific resistance of 10^7 Ω·m or more
Data Source
AI summary
A rubber composition for covering an electromagnetic tag is proposed. The rubber composition may include a base rubber and a reinforcing filler comprising carbon black or boron nitride. The rubber composition may also include an insulating filler comprising at least one selected from silica, titanium dioxide, talc and calcium carbonate. The rubber composition may further include a reinforcing resin comprising an alkyl phenol formaldehyde resin or a resorcinol formaldehyde resin. Based on 100 parts by weight of the base rubber, the total amount of the reinforcing filler and the insulating filler may be 40 parts by weight or more, the amount of the insulating filler may be 10 parts by weight or more, and the amount of the reinforcing resin may be 0.5 parts by weight to 5 parts by weight.