Facade Waterproof Layer Adhesive Bonding
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Solution Overview
Problem
Existing facade constructions for thermal insulation and cladding of building outer walls are labor-intensive, costly, and prone to moisture damage, limiting design flexibility and increasing the risk of frost damage due to inadequate protection of thermal insulation layers.
Innovation Solution
A facade construction method involving a waterproof layer with reinforcement and a double-sided adhesive system using polyurethane adhesive or foam, where cladding panels are directly glued to the waterproof layer, eliminating the need for extensive anchoring and allowing for moisture transport through diffusion-open or vapor-retardant designs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thermal insulation layers are protected by traditional anchoring methods with outer shells spaced apart, then mechanical protection is provided, but the construction becomes labor-intensive and costly
Solution Approach 1:
The patent combines the waterproofing function and the cladding function into a single integrated system. The waterproof layer serves dual purposes: protecting the thermal insulation from moisture and providing a continuous bonding surface for cladding panels. This eliminates the need for separate anchoring systems and outer shells, reducing construction complexity while maintaining mechanical protection.
Solution Approach 2:
The patent extracts the anchoring function from the traditional multi-component system and replaces it with direct adhesive bonding. By removing the mechanical anchoring elements (dowels, anchors, spaced outer shells) and using only adhesive connection between the waterproof layer and cladding panels, the construction process becomes significantly simpler and less labor-intensive.
2Reliability
If traditional waterproofing methods are used with thick adhesive layers, then moisture protection is achieved, but construction time increases due to lengthy drying periods
Solution Approach 1:
The patent changes the physical-chemical parameters of the adhesive material by using polymer-based adhesives with optimized formulation. These adhesives achieve full moisture protection and bonding strength with much thinner layers (1-5 mm) compared to traditional cement-based adhesives, reducing drying time from days to hours while maintaining equivalent or superior moisture protection performance.
Solution Approach 2:
The patent employs composite material systems combining polymer adhesives with reinforcing fibers or mesh embedded in the adhesive layer. This composite approach provides both moisture protection and mechanical strength in a thin, fast-drying formulation, eliminating the need for thick traditional adhesive layers.
3Ease of manufacture
If cladding panels are directly glued to thermal insulation layers, then construction is simplified, but moisture ingress risk increases without proper waterproofing
Solution Approach 1:
The patent creates a universal waterproof layer that performs multiple functions simultaneously: it protects the thermal insulation from moisture ingress, provides a continuous bonding surface for direct adhesive attachment of cladding panels, and allows for vapor diffusion. This multi-functional layer eliminates the need for separate waterproofing and bonding systems, simplifying construction while preventing moisture damage.
Solution Approach 2:
The patent introduces a specialized waterproof layer as an intermediary between the thermal insulation and cladding panels. This intermediate layer serves as both the waterproof barrier and the adhesive substrate, mediating between the moisture protection requirement and the direct bonding simplification, thereby preventing moisture ingress while enabling construction simplicity.
4Strength
If conventional adhesive systems are used with thick layers for mechanical strength, then bonding strength is sufficient, but design flexibility is reduced
Solution Approach 1:
The patent utilizes polymer-based adhesives with adjustable rheological and mechanical properties that allow achieving high bonding strength in thin layers (1-5 mm). The adhesive formulation can be tailored to provide optimal balance between strength, flexibility, and drying time, enabling diverse design configurations without requiring thick adhesive applications that would constrain design options.
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
This method reduces construction time and costs, enhances durability by preventing moisture ingress, and offers design flexibility while ensuring mechanical stability and aesthetic appeal, thereby minimizing frost damage and environmental impact.
Implementation Method 1
at least one adhesive layer made of polyurethane adhesive or polyurethane foam
Implementation Method 2
The thermal insulation layer and the adhesive layer can in each case be designed to be open to diffusion or vapor-retardant in order to enable moisture transport
Data Source
Figure 1~4
Figure 5
AI summary
The invention relates to a façade construction for thermally insulating and cladding external walls of buildings, comprising a thermal insulation layer (2) arranged on the external wall (1) of a building, a watertight layer and at least one cladding panel (6), wherein the cladding panel (6) is adhesively secured to the watertight layer by way of at least one adhesive portion and the watertight layer comprises a watertight reinforcement (3) mounted on the thermal insulation layer (2) and/or a watertight coating (4) of the/a reinforcement (3) mounted on the thermal insulation layer (2).