Colored Foam Sealing Tape for Exterior Joints
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Solution Overview
Problem
Existing joint-sealing tapes in the construction industry face challenges in recovering their shape after compression and providing an aesthetic appearance, especially when exposed to the exterior and subject to weather, as they either stick to joints or tear upon expansion, and lack a unified color appearance.
Innovation Solution
A roll of flexible foam joint-sealing tape with laterally colored surfaces, where the colorant is applied to create a continuous colored appearance at partial expansion, using a binder like paraffin-based wax or solvents to ensure uniform recovery and aesthetic appeal without compromising sealing properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the foam is impregnated with adhesive substances to achieve sealing properties, then the sealing performance is improved, but the recovery speed of the foam is delayed
Solution Approach 1:
The adhesive impregnate is applied locally to the cell walls and surfaces of the foam structure rather than uniformly throughout the entire foam volume. This localized application provides sealing functionality at the contact surfaces while minimizing the overall amount of impregnate, thus reducing the delay in recovery performance.
2Ease of operation
If the foam is compressed and inserted into the joint, then the installation ease is improved, but the aesthetic appearance deteriorates due to visible compression marks and uneven surfaces
Solution Approach 1:
The foam is pre-compressed to a controlled degree during manufacturing or storage, allowing it to be easily inserted into the joint. After installation, the foam gradually recovers to its original shape, providing both ease of installation and acceptable aesthetic appearance over time.
Solution Approach 2:
The foam exhibits dynamic recovery behavior, transitioning from a compressed insertion state to a recovered functional state. This dynamic property allows the foam to be easily installed in compressed form while automatically achieving its final aesthetic appearance as it recovers in the installed position.
3Reliability
If the foam is allowed to fully expand in the joint, then the sealing effectiveness is improved, but the foam may stick to the joint sides and tear if expansion is too great
Solution Approach 1:
The foam's expansion characteristics are controlled by adjusting parameters such as cell structure, material composition, and pre-compression level. This allows the foam to achieve sufficient expansion for effective sealing while limiting the maximum expansion to prevent sticking and tearing.
Solution Approach 2:
The foam is pre-compressed to a specific degree before installation, which cushions the expansion process. This pre-compression ensures that the foam expands gradually and controlledly within the joint, achieving sealing effectiveness without excessive force that could cause sticking or tearing.
4Ease of operation
If the joint-sealing tape is left uncovered in exterior areas, then the installation simplicity is improved, but the aesthetic appearance deteriorates due to visibility and weather exposure
Solution Approach 1:
The foam is manufactured in various colors or with colored coatings that match common building materials and aesthetics. This allows the foam to be left exposed in exterior applications without compromising appearance, while maintaining the installation simplicity of uncovered foam tape.
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 allows for effective sealing and recovery of shape after compression, expanding application in exterior joints while providing a superior aesthetic impression without altering the foam's basic properties or color consistency across lots.
Implementation Method 1
The edge area of at least one of the two lateral surfaces of the joint-sealing tape is uniformly colored with the colorant to a depth of up to a few millimeters by means of dipping, spraying, or spreading.
Implementation Method 2
joint-sealing tape of flexible foam capable of recovery after compression
Implementation Method 3
using a binder like paraffin-based wax or solvents to ensure uniform recovery and aesthetic appeal
Data Source
AI summary
The joint-sealing tape of flexible foam capable of recovering its shape after compression with two lateral surfaces (3, 4) is colored on at least one of the two lateral surfaces (3, 4) with a colorant in such a way that, in a partially expanded functional state of the sealing tape, i.e., in a state of partial recovery after compression, the coloring on the lateral surface (3, 4), when viewed from the side, appears to the human eye as a continuous colored surface.