Surface Sealing Element With Non-Tacky Fleege For Building Structures
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Solution Overview
Problem
Existing surface sealing elements for buildings are difficult to handle and prone to damage due to adhesive sticking issues, requiring extensive effort in production and causing movement difficulties during construction, as they stick to workers' shoes and can be destroyed by foot traffic before concrete is poured.
Innovation Solution
A surface sealing element with a plastic film carrier and a fully impregnated non-tacky adhesion promoter-treated fleece textile layer, which is thin (≤1.5 mm), has nub-like elevations, and uses a low-viscosity impregnating agent for improved adhesion and ease of handling, reducing material usage and storage costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive is applied to the fleece surface for bonding concrete, then bonding strength is improved, but the adhesive sticks to workers' shoes and causes movement difficulties
Solution Approach 1:
The adhesive is extracted from the fleece surface and relocated to the interface between the fleece and concrete. The fleece itself remains adhesive-free, eliminating the problem of adhesive sticking to workers' shoes while maintaining bonding functionality at the concrete interface.
Solution Approach 2:
The interface zone between the fleece and concrete acts as an intermediary carrier for the adhesive. Instead of applying adhesive directly to the fleece, the adhesive is placed in the gap/interface region, allowing it to bond the fleece to the concrete without contaminating the fleece surface.
2Reliability
If adhesive is applied to the entire fleece surface, then bonding coverage is improved, but production effort increases due to immediate sticking requirements
Solution Approach 1:
The adhesive application zone is extracted from the fleece surface and concentrated at the fleece-concrete interface. This eliminates the need to coat the entire fleece surface, reducing production complexity and removing the constraint of immediate sticking during manufacturing.
Solution Approach 2:
Adhesive application is localized to the specific interface region where bonding is needed, rather than applying it uniformly across the entire fleece surface. This localised approach maintains bonding effectiveness while simplifying the manufacturing process.
3Strength
If fleece allows concrete penetration for bonding, then adhesion to concrete is improved, but adhesive is squeezed out and sticks to workers' shoes
Solution Approach 1:
The adhesive is extracted from the fleece matrix and positioned exclusively at the fleece-concrete interface. This prevents adhesive from being squeezed out through the fleece during concrete pouring, eliminating the harmful contamination effect while maintaining interfacial bonding.
Solution Approach 2:
The fleece-concrete interface serves as an intermediary zone that contains the adhesive, allowing concrete penetration through the fleece for bonding while preventing adhesive extrusion to the external surface where it could contaminate workers' shoes.
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 provides a reliable, easy-to-handle, and cost-effective sealing solution that prevents water and gas ingress, maintains integrity under foot traffic, and forms a strong bond with concrete, reducing material usage and transport costs while ensuring easy removal of formwork.
Implementation Method 1
The textile layer is fully impregnated with a non-stick bonding agent
Implementation Method 2
The surface sealing element has nub-like projections on the surface of the textile layer facing away from the flat carrier, and/or the flat carrier has nub-like projections on its surface facing away from the textile layer
Implementation Method 3
uses a low-viscosity impregnating agent for improved adhesion and ease of handling
Data Source
Figure 1
AI summary
A surface sealing element 1 for building structures is described. The surface sealing element 1 has a flat carrier 2, wherein the flat carrier is a plastic film, and a textile layer 3 arranged on the flat carrier 2 and inseparably bonded to the flat carrier 2, wherein the textile layer is a non-woven fabric, wherein the textile layer 3 is fully impregnated with a non-stick bonding agent, and wherein the surface sealing element 1 has a thickness ≤ 1.5 mm.