Sealing web
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Solution Overview
Problem
Existing sealing paths for building areas, such as roofs and facades, face challenges in being inexpensive to manufacture, having high dimensional stability, low shrinking behavior, and allowing for problem-free mechanical attachment, while also maintaining a smooth surface and facilitating easier recycling compared to those with polyester deposits as reinforcements.
Innovation Solution
A multi-layered sealing system is proposed, comprising outer layers made of polyvinyl chloride (PVC) or PVC copolymer with a low molecular weight plasticizer, and a combination carrier insert consisting of a glass fleece and glass reinforcement made of mesh goods, girts, or knit structures. The glass reinforcement is connected to the glass fleece using a binder, with the binder's weight ranging from 5% to 50% of the total weight of the binder and the combination carrier insert.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polymer plasticizers are used to achieve high impact strength and weather resistance, then the sealing membrane exhibits good processability and durability, but the manufacturing cost increases significantly
Solution Approach 1:
The patent changes the molecular weight parameter of the plasticizer from high (polymer plasticizers with Mw 3,000-12,000) to low (Mw < 1,000, preferably 150-800), which fundamentally alters the cost structure while maintaining the required mechanical properties through optimized plasticizer content (20-40 wt%)
Solution Approach 2:
The patent replaces expensive polymer plasticizers with much cheaper low molecular weight plasticizers, accepting that the plasticizer may migrate or evaporate over time, but compensating for this through the multi-layer construction and binder system that maintains overall membrane integrity
2Strength
If polyester inserts are used for reinforcement, then the sealing membrane achieves high strength, but recycling becomes more difficult and costly
Solution Approach 1:
The patent extracts the polyester reinforcement component from the membrane system and replaces it with glass fleece and glass reinforcement, which can be more easily separated and recycled, while maintaining the required mechanical strength through the multi-layer construction
Solution Approach 2:
The patent enables easier recovery and recycling of reinforcement materials by using glass-based components that can be more easily separated from the PVC matrix compared to polyester, facilitating material recovery at end-of-life
3Ease of operation
If a smooth surface is achieved through specific construction, then the sealing membrane allows problem-free mechanical fastening, but the manufacturing complexity increases
Solution Approach 1:
The patent applies different surface qualities to different locations: the outer surfaces are kept smooth for fastening, while the internal structure uses textured glass fleece and knitted fabric for reinforcement, achieving both smooth external surfaces and structural integrity without excessive complexity
Solution Approach 2:
The patent uses composite construction with PVC outer layers, glass fleece, and knitted fabric reinforcement bonded together, where each layer performs its specific function and the combination achieves the desired smooth surface and mechanical fastening properties
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 achieves a cost-effective, dimensionally stable, and low-shrinkage sealing path with a smooth surface, enabling problem-free mechanical attachment and easier recycling compared to traditional systems. The use of a glass fleece and mesh goods reinforcement provides enhanced strength and durability, while the binder ensures a strong connection between layers.
Implementation Method 1
The glass reinforcement is connected to the glass fleece using a binder, with the binder's weight ranging from 5% to 50% of the total weight of the binder and the combination carrier insert
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention relates to a multi-layer sealing web (10) for a region of a structure, said sealing web comprising outer layers (14, 22, 24), which contain a base polymer and a plasticizer, and a combination carrier insert (16), which is provided between the outer layers and has a glass nonwoven (20) and a glass reinforcement that consists of a knitted fabric (18) or contains same.