Sealing Tape Functional Layer Reduces Complexity
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Solution Overview
Problem
Current sealing tapes for polymeric waterproofing membranes have a complex structure, leading to high production costs and inadequate bonding with cementitious compositions and adhesives, making them unsuitable for cost-effective sealing of joints and patching breaches in pre-applied waterproofing systems.
Innovation Solution
A sealing device comprising a thermoplastic polymer-based waterproofing layer and a functional layer with a solid particulate filler, connected directly or indirectly over their opposing surfaces, and coated with a pressure-sensitive or hot-melt adhesive, which reduces production costs and enhances bonding with cementitious compositions and adhesives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a fiber-based contact layer is used in sealing tapes, then bonding with substrates is improved, but production costs increase and bonding with cementitious compositions deteriorates
Solution Approach 1:
The patent removes the fiber-based contact layer from the sealing tape structure and replaces it with a functional layer containing solid particulate fillers. This extraction eliminates the complexity associated with fiber layers while maintaining bonding capabilities through the adhesive layer and filler particles that interact with cementitious compositions.
Solution Approach 2:
The patent creates a composite functional layer combining thermoplastic polymer matrix with solid particulate fillers (such as mineral fillers, metal powders, or ceramic particles). This composite structure provides both bonding strength through the polymer-adhesive system and improved interaction with cementitious compositions through the particulate fillers, while simplifying the overall structure compared to traditional fiber-based contact layers.
2Strength
If a fiber-based contact layer is used in sealing tapes, then bonding with substrates is improved, but production costs increase
Solution Approach 1:
The patent replaces expensive fiber-based contact layers with a cost-effective functional layer made from thermoplastic polymers and solid particulate fillers. The functional layer achieves sufficient bonding performance through the adhesive layer and filler-cement interaction, eliminating the need for costly fiber materials while maintaining adequate service life for sealing applications.
Solution Approach 2:
The patent changes the material composition parameters by substituting fiber-based materials with a thermoplastic polymer matrix containing solid particulate fillers. This parameter change reduces material costs while maintaining bonding strength through optimized adhesive formulations and filler properties that enhance interaction with both substrates and cementitious compositions.
3Reliability
If conventional sealing tapes are used for polymeric membranes, then sealing is achieved, but bonding with cementitious compositions and adhesives is inadequate
Solution Approach 1:
The patent applies local quality enhancement by incorporating solid particulate fillers specifically in the functional layer that contacts cementitious compositions. These fillers create localized interaction points that improve bonding with cement while the thermoplastic polymer matrix maintains overall sealing integrity. The adhesive layer is also optimized locally to ensure strong bonding with both the functional layer and the polymeric membrane.
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 proposed sealing device offers lower production costs and improved bonding performance, making it suitable for sealing joints and patching breaches in polymeric waterproofing membranes, ensuring effective water resistance and durability.
Implementation Method 1
coated with a pressure-sensitive or hot-melt adhesive
Implementation Method 2
coated with a pressure-sensitive or hot-melt adhesive
Implementation Method 3
coated with a pressure-sensitive or hot-melt adhesive
Data Source
Figure 1~3
AI summary
The invention is directed to a sealing device comprising a waterproofing layer (2), a functional layer (3), and an adhesive layer (4) coated on and at least partially covering the first major surface of the waterproofing layer (2) opposite the side of the functional layer (3). The invention is also directed to a method for producing a sealing device, to a method for waterproofing a substrate, and to use of the sealing device for sealing lapped joints formed between overlapping portions of waterproofing membranes and for patching of breaches in waterproofing membranes.