Microperforated Composite Coating for Sound-Absorbing Elements
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Solution Overview
Problem
The development of acoustically effective and aesthetically appealing soundproofing elements for indoor use is challenged by increasing fire protection requirements, particularly in public buildings, where combustible materials are often used, making it difficult to achieve strict fire protection classifications while maintaining mechanical stability and acoustic effectiveness.
Innovation Solution
A method for producing a microperforated composite cover layer involves reducing the thickness of a decorative layer from an initial thickness to a final thickness of at most 0.6 mm, using a non-combustible support layer, and creating continuous microperforations between the decorative and support layers, ensuring mechanical stability and reduced fire load while maintaining acoustic effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a thick decorative layer is used to ensure mechanical stability and aesthetic quality, then the mechanical stability and aesthetic appearance are improved, but the fire load increases and fire protection classification deteriorates
Solution Approach 1:
The patent applies composite materials by combining a thin decorative layer with a non-combustible support layer to create a composite top layer. The decorative layer provides aesthetic quality while the non-combustible support layer provides mechanical stability and low fire load, achieving both requirements simultaneously through material composition rather than increasing decorative layer thickness
Solution Approach 2:
The top layer is segmented into two functional components: a thin decorative layer for aesthetics and a separate non-combustible support layer for structural integrity and fire protection. This segmentation allows each layer to be optimized for its specific function without compromising the other, solving the contradiction between thickness requirements and fire safety
2Object-affected harmful factors
If the decorative layer thickness is reduced to lower fire load, then fire protection classification is improved, but mechanical stability deteriorates
Solution Approach 1:
By using composite materials with a non-combustible support layer, the patent achieves mechanical stability without relying on the thickness of the decorative layer. The support layer compensates for the reduced thickness, maintaining structural integrity while minimizing fire load
Solution Approach 2:
The non-combustible support layer acts as an intermediary that transfers and distributes mechanical loads, compensating for the thinness of the decorative layer. This intermediary structure provides the necessary mechanical stability that would otherwise require a thicker decorative layer
3Strength
If a thick decorative layer is used to ensure mechanical stability, then mechanical stability is improved, but the fire load increases and requires thicker non-combustible support layer
Solution Approach 1:
The composite structure allows the decorative layer to be thin because the non-combustible support layer assumes the primary structural function. This eliminates the need for excessive thickness in either layer, optimizing the total material quantity while maintaining mechanical stability
4Shape
If combustible materials are used in decorative layer to achieve aesthetic quality, then aesthetic appearance is improved, but fire protection classification deteriorates
Solution Approach 1:
The patent uses composite materials where the decorative layer can be made of aesthetically pleasing materials while the non-combustible support layer ensures fire protection. The combination allows aesthetic quality and fire safety to coexist without requiring the decorative layer itself to be thick or made of non-combustible material
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 method achieves a reduced fire load and improved aesthetic quality by minimizing the decorative layer's thickness, ensuring compliance with strict fire protection classifications while maintaining the acoustic effectiveness of the soundproofing element.
Implementation Method 1
the sound-absorbing effect of micro-perforated absorbers results essentially from the air friction in a large number of small holes or slits (i.e. the micro-perforations) which absorb sound energy
Implementation Method 2
sound waves penetrating into the micro-perforation of the cover layer and being absorbed in cooperation with the continuous channels of the carrier layer
Data Source
Figure 1a~1b
Figure 1c~1d
Figure 2~3
AI summary
A method for producing a microperforated composite top layer (2) for a sound-absorbing element (100) is disclosed. The method comprises bonding a decorative layer and a support layer, subsequently reducing the thickness of the decorative layer, e.g., by grinding, and providing the composite top layer with continuous microperforation. The method is suitable for producing sound-absorbing elements with improved fire protection. Composite top layers for sound-absorbing elements, sound-absorbing elements, and methods for producing sound-absorbing elements are also disclosed.