Non-combustible Absorber Element for Heat and Sound Damping
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Solution Overview
Problem
Existing absorber elements for thermal and sound insulation, typically using mineral wool encased in polyethylene film, face challenges such as inadequate fire protection classification, mechanical instability, and sound insulation deficiencies, particularly failing to meet the required fire protection class A2, especially in public buildings, and suffer from issues like fiber leakage and dimensional mismatches.
Innovation Solution
An absorber element comprising a fibrous insulating material, such as mineral wool, encased in a flat covering material with distinct properties, where the carrier and covering materials are connected to form a closed bag, using plastic films or fabrics with varying thicknesses and reinforcement, and incorporating binders and flame retardants to achieve a calorific value ≤3.0 MJ/kg, ensuring fire protection class A2 compliance and improved mechanical stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If polyethylene film is used to encase mineral wool for fiber containment, then fiber leakage is prevented, but fire protection classification deteriorates (cannot achieve class A2)
Solution Approach 1:
The patent uses a composite covering material consisting of a non-combustible base layer (metal mesh, glass fiber fabric, or rock wool fabric) combined with a flame-retardant coating layer. This composite structure provides both fiber containment functionality and fire protection class A2 compliance, replacing the single-material polyethylene film solution.
Solution Approach 2:
The patent changes the material parameters by selecting covering materials with specific fire resistance properties (non-combustible base materials) and applying flame-retardant coatings with defined thicknesses (0.1-5.0 μm). These parameter changes enable the covering material itself to achieve fire protection class A2 without relying on the combustible polyethylene film.
2Reliability
If thin covering material is used to maintain sound insulation properties, then acoustic transparency is improved, but mechanical stability deteriorates
Solution Approach 1:
The patent employs a composite covering material structure where a mechanically strong non-combustible base layer (metal mesh, glass fiber fabric, or rock wool fabric) provides structural stability, while a thin flame-retardant coating layer (0.1-5.0 μm) provides fire protection. This composite allows the covering to be thin for sound insulation while maintaining mechanical strength through the reinforcement layer.
Solution Approach 2:
The patent applies different material properties to different layers of the covering: the base layer provides mechanical strength and structural integrity, while the thin flame-retardant coating layer provides fire protection and surface properties. This local differentiation of material qualities allows optimization of both mechanical stability and sound insulation.
3Reliability
If flame-retardant coating is applied to achieve fire protection class A2, then fire resistance is improved, but manufacturing complexity increases
Solution Approach 1:
The patent specifies precise parameter ranges for the flame-retardant coating thickness (0.1-5.0 μm) and basis weight (0.01-0.17 kg/m²) to achieve fire protection class A2. By defining these parameters, the patent simplifies manufacturing by providing clear specifications rather than requiring complex quality control processes.
Solution Approach 2:
The patent uses a pre-manufactured non-combustible base material (metal mesh, glass fiber fabric, or rock wool fabric) as an intermediary carrier that already provides structural stability. The flame-retardant coating is then applied as a thin layer on this stable base, simplifying the overall manufacturing process compared to creating fire-resistant materials from scratch.
4Adaptability or versatility
If carrier material with properties different from covering material is used, then functional optimization is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies different material properties to different functional layers: the carrier material provides mechanical support and structural stability, while the covering material provides fire protection and surface properties. This local optimization of material qualities for specific functions allows each layer to be independently selected and manufactured to its optimal specifications.
Solution Approach 2:
The patent uses a composite structure with a non-combustible base layer and a flame-retardant coating layer, where each layer has optimized properties for its specific function. The base layer provides mechanical stability and structural integrity, while the thin coating layer provides fire protection, allowing independent optimization of each component.
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 absorber elements with enhanced fire protection, mechanical stability, and sound insulation properties, meeting the fire protection class A2 requirements while minimizing fiber leakage and dimensional issues, thus suitable for public buildings.
Implementation Method 1
Absorbers are devices that convert the energy contained in sound waves into heat energy
Implementation Method 2
For thermal and/or acoustic insulation, walls and/or ceilings of buildings are fitted with suitable insulating materials
Data Source
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AI summary
The present invention relates to an absorber element for heat and/or sound damping, comprising a flat carrier material (2), a fibrous damping material (3), and a flat cover material (4), wherein the carrier material (2) and the cover material (4) are connected to each other such that bags, which are closed on all sides, are formed, receiving the damping material (3). The present invention further relates to a method for producing corresponding absorber elements.