Panel Adhesive Systems with Activatable Debonding for Recycling
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Solution Overview
Problem
Existing panels with multiple materials are difficult to disassemble and recycle due to strong, permanent adhesives that leave contaminants during delamination, hindering effective recycling and reuse.
Innovation Solution
A panel design with a bonding unit that can be decreased in adhesion using a debonding activator, such as heat, humidity, radiation, or chemicals, allowing for clean separation of units with residual adhesive presence minimized.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If permanent adhesives such as thermoset adhesives are used to provide durable bonding of units, then the bonding strength and reliability are improved, but the ease of separation and recycling deteriorates
Solution Approach 1:
The adhesive bonding unit is designed with switchable adhesion properties, allowing it to dynamically change from a strong bond during use to a weak bond during recycling. The adhesive can be activated by external stimuli such as heat, moisture, or chemical agents, enabling easy separation of panel units at end-of-life while maintaining durability during service.
Solution Approach 2:
The adhesive bonding unit's properties are changed by applying external stimuli (heat, moisture, chemicals) to alter its adhesion characteristics. By changing physical or chemical parameters of the adhesive, the bond strength can be reduced to enable clean separation of different panel units for recycling.
2Strength
If strong adhesives are used to connect different materials, then the bonding strength is improved, but the manufacturing precision of separation deteriorates
Solution Approach 1:
The adhesive transitions from a strong, permanent bond during panel use to a weak, easily breakable bond during recycling. This dynamic change allows for clean separation of different materials without damage to the panel units, achieving both strong bonding during service and precise separation during recycling.
Solution Approach 2:
The adhesive bonding unit is designed to be extractable or removable from the panel units during recycling. The adhesive can be completely separated from the panel materials, leaving no contaminants behind, which enables clean delamination and preserves the integrity of recycled materials.
3Reliability
If permanent adhesives are used to ensure durable bonding, then the reliability is improved, but the loss of substance during recycling deteriorates
Solution Approach 1:
The adhesive bonding unit is designed to be completely discarded or separated from the panel materials during recycling. By using switchable adhesives that can be easily removed, the process recovers clean panel units without adhesive contamination, minimizing substance loss and enabling high-quality recycling of different materials.
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
Facilitates efficient separation and recycling of panel components by reducing adhesive bond strength, enabling clean delamination and separate recycling of materials without contamination.
Implementation Method 1
said adhesion is decreasable by a debonding activator, such as heat, humidity, radiation or chemicals
Implementation Method 2
said adhesion is decreasable by a debonding activator, such as heat, humidity, radiation or chemicals
Implementation Method 3
said adhesion is decreasable by a debonding activator, such as heat, humidity, radiation or chemicals
Data Source
AI summary
A panel includes two or more units connected to each other. At least one of the units is a bonding unit that provides adhesion between itself and at least one other of the units. The adhesion is decreasable by a debonding activator. An adhesive system for panels is provided along with use of the adhesive system and a method for disassembling a panel.