RFID Tire Insert Bonding With Latex-Resorcinol Adhesive
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Solution Overview
Problem
The integration of electronic devices, such as RFID tags, into rubber articles like tires faces challenges due to inadequate adhesion between insulating layers and rubber, leading to potential device failure and damage to the tire's rubber surface.
Innovation Solution
A method involving a deposition of an adhesive solution comprising a latex of an elastomer rubber and a combination of resorcinol and formaldehyde, followed by a heating process, is applied to ensure strong adhesion between thermoplastic material layers and rubber, enhancing the structural stability of the electronic device within the tire.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If insulating PET layers are used to enclose RFID chips and antennas in a tyre, then the electronic device structure is formed, but the adhesion between the insulating layers and rubber layers is insufficient causing device splitting and rubber damage
Solution Approach 1:
An adhesive layer comprising a latex of an elastomer rubber and a combination of resorcinol and formaldehyde is introduced between the insulating PET layers and the outer rubber layers. This intermediary adhesive layer chemically bonds to both the PET and rubber materials, ensuring strong adhesion and preventing device splitting during tyre production and operation.
Solution Approach 2:
The adhesive properties of the interface between insulating layers and rubber layers are enhanced by changing the chemical parameters of the adhesive solution. The specific combination of resorcinol, formaldehyde, and elastomer rubber latex creates optimal bonding characteristics that match both PET and rubber substrates, resolving the adhesion failure issue.
2Ease of operation
If barcodes are applied on tyres for identification, then production tracking is enabled, but the codes can be cancelled or damaged during production and operation becoming unreadable
Solution Approach 1:
The mechanical barcode system is replaced with an electronic RFID device that uses electromagnetic fields for identification. This electronic system eliminates the mechanical wear and damage issues associated with barcodes, providing reliable, contactless identification that can withstand tyre production and operation conditions.
3Device complexity
If the insulating layers are not correctly adhered to the rubber layers, then manufacturing complexity is reduced, but the RFID device and surrounding rubber can be damaged causing device failure
Solution Approach 1:
The adhesive solution is applied to the insulating PET layers before assembling the complete RFID device and embedding it in the rubber tyre. This preliminary application of adhesive ensures that when the device is assembled and subjected to operational stresses, the layers remain firmly bonded, preventing device failure and rubber damage without adding complex post-assembly adhesion processes.
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
This method significantly improves the adhesion force between the thermoplastic layers and the rubber, preventing device splitting and ensuring the correct operation of electronic components embedded in tires, as demonstrated by adhesion tests.
Implementation Method 1
an adhesive solution consisting of a basic water solution comprising a latex of an elastomer rubber and a combination of resorcinol and formaldehyde is applied on at least one outer surface of one of the layers of thermoplastic material
Implementation Method 2
a heating operation, during which the layers of thermoplastic material on which the adhesive solution was applied are kept at a temperature ranging from 120 to 230°C for an amount of time ranging from 2 to 15 min
Implementation Method 3
This method significantly improves the adhesion force between the thermoplastic layers and the rubber, preventing device splitting
Data Source
AI summary
A method to manufacture an electronic device to be applied to rubber article. The device comprises an electronic element, two layers of thermoplastic material which are arranged in a sandwich-like manner so as to contain, between one another, the electronic element, and at least an outer rubber layer arranged to cover an outer surface of at least one of the respective thermoplastic layers. The method comprises a preliminary step comprising (a) a deposition operation, during which an adhesive solution consisting of a basic water solution comprising a latex of an elastomer rubber and a combination of resorcinol and formaldehyde is applied on at least one outer surface of one of the layers of thermoplastic material; and (b) a heating operation, during which the layers of thermoplastic material on which the adhesive solution was applied are kept at a temperature ranging from 120 to 230°C for an amount of time ranging from 2 to 15 min.