Segmented Foam Sealing Tape for Construction Joint Integrity
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Solution Overview
Problem
Existing joint sealing methods, particularly in dry construction, are labor-intensive, prone to cracking, and require precise measurement, often failing to ensure adequate sealing against noise, smoke, and fire due to limited expansion and compressibility of sealants, and require access to both sides of the drywall for installation.
Innovation Solution
A joint sealing tape with an elongated carrier and separate compressible sealing elements that are only partially connected to the carrier, allowing for precise fitting and self-adjustment to component surfaces, ensuring effective sealing against unevenness and movement, and optionally providing fire-resistant properties through slow-burning foam materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sealant is used to seal the gap between plasterboard and ceiling, then sealing against sound and smoke is achieved, but the sealant cracks over time under excessive stress and has limited expansion and compression capacity
Solution Approach 1:
The sealing system is divided into multiple foam sealing tapes arranged in parallel on a carrier layer, with each tape independently bonded to the carrier. This segmentation allows each sealing element to deform independently under stress, preventing crack propagation across the entire sealing system and improving overall reliability under excessive stress.
Solution Approach 2:
The invention uses a composite structure combining a flexible carrier layer with multiple foam sealing tapes. The foam material provides compressibility and expansion capacity (exceeding 25%), while the carrier layer maintains structural integrity. This composite design resolves the contradiction by providing both sealing reliability and stress resistance through material combination.
2Length of moving object
If the gap between plasterboard and ceiling is reduced to minimize joint width, then material usage is optimized, but the sealant is squeezed out of the gap due to limited compressibility
Solution Approach 1:
The foam sealing tapes are designed with high compressibility parameters, capable of exceeding 25% compression without permanent deformation. This parameter change allows the sealing system to accommodate reduced joint widths while maintaining sealing integrity, as the foam can compress sufficiently to fill smaller gaps without being squeezed out.
3Reliability
If the gap between plasterboard and ceiling is increased to accommodate sealant expansion, then sealing reliability is improved, but the joint width becomes excessively large requiring more material
Solution Approach 1:
The foam sealing tapes possess exceptional expansion capacity exceeding 25%, allowing them to fill larger gaps effectively. This parameter enables reliable sealing in wider joints while maintaining compact dimensions, resolving the contradiction between sealing reliability and joint width optimization.
4Reliability
If sealant is applied to seal the joint, then sealing is achieved, but the application process is labor-intensive and requires access to both sides of the drywall
Solution Approach 1:
The foam sealing tapes are pre-attached to a carrier layer in a factory setting, creating a pre-assembled sealing unit. This preliminary action eliminates the need for on-site application procedures requiring access to both sides of the drywall, as the entire sealing system can be installed from one side, significantly improving installation ease while maintaining sealing effectiveness.
5Adaptability or versatility
If the sealant is made more compressible to accommodate joint movement, then expansion and compression capacity is improved, but the sealant loses structural stability and may detach from substrate
Solution Approach 1:
The foam sealing tapes are bonded to a stable carrier layer, creating a composite structure where the foam provides compressibility and expansion capacity for joint movement accommodation, while the carrier layer maintains structural stability and prevents detachment. This composite approach resolves the contradiction between adaptability and stability.
Solution Approach 2:
The sealing system is segmented into multiple independently bonded foam tapes on the carrier, allowing each segment to deform under stress while maintaining overall structural integrity. This segmentation enables high compressibility for joint movement while the distributed bonding pattern maintains stability and prevents detachment.
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 simplifies the sealing process, ensures reliable and permanent sealing against sound, smoke, and fire, allows for easy adjustment without additional tools, and maintains sealing integrity even under stress, reducing the need for large joint widths and minimizing the risk of sealant detachment.
Implementation Method 1
at least two separate compressible sealing elements of predetermined width, which are spaced apart and arranged side by side in the longitudinal direction of the carrier
Implementation Method 2
the sealing elements are each only firmly connected to the carrier over a part of their broad side
Data Source
Figure 1~2
Figure 3a~3c
Figure 4~5
AI summary
The invention relates to a joint-sealing tape, comprising an elongate carrier and at least two separate sealing elements of predetermined width, which are arranged on one side of the carrier in such a way that the sealing elements extend in a carrier longitudinal direction at a distance from each other and adjacent to each other and which each have two opposite broad sides and two narrow sides, which extend transversely to the broad sides and connect the broad sides, wherein the sealing elements are arranged on the carrier by means of one broad side, wherein the sealing elements are each firmly connected to the carrier only over part of the broad side thereof. The invention further relates to a sealing assembly for sealing construction joints, in particular for sealing against sound and/or smoke and optionally against fire, comprising such a joint-sealing tape.