Concave Foam Sealing Strip for Variable Building Joint Widths
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Solution Overview
Problem
Existing pre-compressed sealing tapes for building joints have issues with temperature-dependent expansion rates, limited suitability for varying joint widths, and require multiple stock options, leading to installation challenges and material inefficiencies.
Innovation Solution
A deformable sealing strip with concave and convex sides, adhesive layers, and a deformable foam base, allowing for optimal adaptation to uneven surfaces and varying joint widths, featuring adjustable adhesive strength and torsional stability to facilitate easy installation and reliable sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pre-compressed sealing tapes are used, then sealing function is provided, but expansion rate becomes temperature-dependent causing installation difficulties
Solution Approach 1:
The patent changes the physical state of the foam material from pre-compressed to non-pre-compressed, eliminating temperature-dependent expansion issues. The foam remains in its original state during storage and transport, and only expands when intentionally activated during installation, providing consistent behavior regardless of ambient temperature.
Solution Approach 2:
The patent applies adhesive to the foam surface in advance during manufacturing, but keeps the foam itself uncompressed. This allows the adhesive to be ready for bonding while the foam maintains its stable, non-expanded state until installation, separating the adhesive preparation from the expansion timing.
2Reliability
If pre-compressed sealing tapes are used, then sealing is achieved, but foam strip bears load during installation causing delayed recovery at low temperatures
Solution Approach 1:
The patent changes the compression parameter from pre-compressed to non-pre-compressed state. The foam strip is delivered in its full-volume state and only compressed during the actual sealing installation, eliminating the problem of load-bearing during transport and storage that causes delayed recovery at low temperatures.
3Reliability
If pre-compressed sealing tapes are used, then sealing is provided, but only limited joint widths are suitable requiring multiple stock options
Solution Approach 1:
The patent makes a single foam strip design suitable for multiple joint widths by eliminating pre-compression. The non-pre-compressed foam can be compressed to various degrees during installation to fit different joint sizes, and the adhesive application area can be adjusted accordingly, providing universal applicability across different sealing scenarios.
Solution Approach 2:
The patent introduces dynamic adaptability by allowing the foam compression level to be adjusted during installation rather than being fixed in advance. This enables the same foam strip design to adapt to different joint widths by varying the compression amount, making the system dynamic rather than static.
4Reliability
If pre-compressed sealing tapes are used, then sealing function is achieved, but foam sealing properties against wall are limited
Solution Approach 1:
The patent applies adhesive to the foam surface in advance during manufacturing, preparing the bonding interface before installation. This preliminary adhesive application ensures strong bonding to the wall surface, compensating for the reduced mechanical pressure from foam expansion alone, and creates a more reliable seal through chemical adhesion rather than relying solely on mechanical pressure.
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
Enables quick, reliable, and uniform sealing of joints regardless of temperature and joint width, reducing installation errors and material requirements, while ensuring consistent adhesion and sealing quality on various substrates.
Implementation Method 1
The base body is made of a deformable foam material. The deformable base body allows for optimal adaptation and thus optimized sealing against uneven surfaces and varying joint widths.
Implementation Method 2
An adhesive layer is applied to one side of the foam strip, allowing the sealing tape to be bonded to a component.
Data Source
Figure 1a~1c
Figure 2a~2h
Figure 3
AI summary
The invention relates to a sealing strip (1) for sealing joints, preferably in the construction sector, with an elongated base body (11) which is bounded by a first cheek side (111) on which a first adhesive layer (13) is arranged, a second cheek side (111') on which a second adhesive layer (13') is arranged, a first end face (112) and a second end face (112') and is made of a deformable foam material, wherein the first cheek side (111) is designed to be concave with respect to the base body (11).