Refractory Adhesive Sealing Device with Intumescent Coating
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Solution Overview
Problem
Existing refractory adhesive sealing devices for building and vehicle openings are inadequate in resisting high temperatures and fires, as the adhesive loses its properties, allowing smoke, flames, and water to pass through, posing risks to occupants and potentially causing explosions in electric vehicles.
Innovation Solution
A refractory adhesive sealing device comprising a metallic pellet with a crosslinkable acrylic polymer adhesive and an intumescent coating, where the intumescent coating is applied on one side of the pellet to protect the adhesive and pellet from heat, maintaining integrity and preventing smoke and flames from passing through.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a traditional adhesive sealing device is used, then the device is thin and easy to install, but it pierces quickly under naked flame exposure allowing fumes and flames to pass through
Solution Approach 1:
The sealing device uses a composite structure combining a metallic pellet substrate with an intumescent coating layer. The metallic pellet provides structural integrity and thermal resistance, while the intumescent coating expands under heat to form an insulating barrier. This composite material approach enables the thin sealing device to maintain effectiveness for several minutes under naked flame exposure, preventing fume and flame penetration while keeping the device installable.
2Temperature
If an intumescent material is added to the adhesive mass, then fire resistance is improved, but the adhesive properties are significantly reduced and the device detaches from the support
Solution Approach 1:
The sealing device is segmented into two distinct functional layers: a metallic pellet substrate that provides structural support and thermal resistance, and an intumescent coating layer applied only on one face that provides fire protection. This segmentation separates the adhesive bonding function (performed by the metallic pellet with adhesive applied to it) from the intumescent expansion function, preventing the adhesive from losing its properties while maintaining fire resistance.
Solution Approach 2:
The intumescent coating is applied locally only on one face of the metallic pellet, specifically the face that will be exposed to the through-opening. This local application ensures that the intumescent material provides fire protection where needed without interfering with the adhesive bonding on the other face, maintaining both fire resistance and reliable attachment to the support.
3Ease of operation
If the sealing device is made thin for easy installation, then ease of operation is improved, but the device is pierced quickly by naked flame allowing rapid fire spread
Solution Approach 1:
The thin metallic pellet substrate combined with the intumescent coating creates a composite material that maintains structural integrity under fire exposure. The metallic pellet provides baseline thermal resistance even at thin dimensions, while the intumescent coating expands under heat to create an insulating barrier that prevents rapid fire penetration, enabling the device to remain both easy to install and effective against fire.
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 solution effectively prevents smoke and flames from passing through the opening by maintaining the adhesive's integrity and protecting the pellet, ensuring the sealing device remains functional for several minutes, significantly longer than existing solutions, and allows for mechanized installation and removal.
Implementation Method 1
an intumescent coating which covers at least a portion of the second face of the pellet
Data Source
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AI summary
The invention relates to a refractory adhesive sealing device (1) for a through opening (O) in an element (E) of a building or an element (E) of a vehicle, this refractory adhesive sealing device (1) comprises, on the one hand, a pellet (2), which is made of a metallic material, which has a thickness between 10 microns and 150 microns, and which has a first face (20) as well as a second face (21), on the other hand, an adhesive (3), which covers at least a part of the first face (20) of the pellet (2), and which is configured to adhere to said element (E), and, on the other hand, an intumescent coating (4) which covers at least a part of the second face (21) of the pellet (2). The invention also relates to a method for manufacturing such a refractory adhesive sealing device (1) and an installation for implementing this method.