Reactive Functional Surface for Closed-Cell Foam Insulation Bonding
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Solution Overview
Problem
Existing covering systems struggle to securely attach components made of closed-cell foam materials due to their unfavorable surface properties, limiting material choices for facade elements.
Innovation Solution
A covering system with a reactive functional surface, such as a thermo-adhesive polyurethane resin film, is bonded under pressure and temperature to a closed-cell foam substrate, forming a secure bond through a melting process, allowing attachment to components like expanded or foam glass.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If adhesive bonding is used to attach components to the substrate, then the attachment process is simple and quick, but the bonding security is insufficient for components with unfavorable surface properties such as closed-cell foam materials
Solution Approach 1:
The patent changes the bonding parameters from standard adhesive bonding to reactive bonding under elevated temperature (e.g., 80-200°C) and pressure conditions. This parameter change enables the reactive functional surface to chemically react with closed-cell foam materials, creating strong covalent bonds that overcome the unfavorable surface properties of these materials while maintaining a relatively simple attachment process.
Solution Approach 2:
The patent introduces a reactive functional surface as an intermediary layer between the substrate and the closed-cell foam components. This intermediary surface contains reactive groups that can chemically bond to both the substrate and the foam material, mediating the bonding process and enabling secure attachment where direct adhesive bonding would fail.
2Adaptability or versatility
If conventional adhesive fasteners are used, then the attachment method is universally applicable to various materials, but it cannot securely bond to closed-cell foam materials with unfavorable surface properties
Solution Approach 1:
The patent applies local quality by creating a reactive functional surface with specific chemical properties tailored for bonding to closed-cell foam materials. Rather than using a universal adhesive that works poorly on all materials, the reactive surface is locally optimized with specific functional groups that can chemically interact with the unfavorable surface properties of closed-cell foams, achieving high bond strength for this specific material type.
3Reliability
If a reactive functional surface is introduced to bond with closed-cell foam materials, then bonding security is improved, but the device complexity increases due to additional components and processing steps
Solution Approach 1:
The patent merges the reactive functional surface with the substrate or the connecting device structure, eliminating the need for separate bonding agents or additional components. By integrating the reactive bonding capability directly into the existing structure, the system achieves secure bonding to closed-cell foam materials without significantly increasing overall device complexity.
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 secure attachment of closed-cell foam materials by creating a permanent bond, even with unfavorable surface properties, using a thermo-adhesive film that chemically bonds with the substrate during molding, ensuring structural integrity and versatility.
Implementation Method 1
A reactive functional surface, in particular in the form of a thermo-adhesive polyurethane resin film, is attached to the side of the carrier surface... This method involves a melting process under pressure at a reaction temperature between the substrate and the component
Implementation Method 2
the polyurethane ideally also chemically bonds with the binder, which is typically added to the foam glass... enables a secure bond between the substrate and components, even if the components have surface properties unsuitable for conventional adhesive bonds
Data Source
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AI summary
1. Covering system for insulation devices on building structures and load-bearing structures 2. A covering system for insulation devices (2) on building structures and load-bearing structures, with a connecting device (24), consisting of a support surface (28) which has adhesive closure elements (30) which can be connected with correspondingly designed adhesive closure elements (22), is characterized in that on the side (34) of the support surface (28) facing away from the adhesive closure elements (30) a reactive functional surface (36) is attached as a further component of the connecting device (24), which permanently bonds with a preferably closed-cell foam material (4; 26) of the respective insulation device (2) under a predefinable forming pressure and a predefinable reaction temperature.