Layered High-Void-Fraction Material with Composite Surface
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Solution Overview
Problem
Existing high-void-fraction insulation materials lack structural strength and bending stiffness, necessitating the use of additional materials and installation steps, which increases labor, material costs, and environmental impact.
Innovation Solution
A layered high-void-fraction material with a composite surface layer comprising structural material and a polyester derived from an aliphatic polyol and an aliphatic polycarboxylic acid, which enhances mechanical strength and allows for potential use without a covering plate material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a separate covering plate material is used with high-void-fraction insulation material, then mechanical strength and surface structure are improved, but installation complexity and material quantity increase
Solution Approach 1:
The patent combines the insulation material and surface covering into a single integrated product. The high-void-fraction insulation material is directly formed with a surface layer that provides both insulation and surface structure functions, eliminating the need for separate covering plate materials and reducing installation steps to a single application process.
Solution Approach 2:
The surface layer of the insulation material serves multiple functions simultaneously: it provides mechanical strength, creates an attractive surface structure for painting or wallpapering, and maintains the insulation properties. This multi-functional design replaces the need for separate covering materials that would traditionally be required for structural support and aesthetic finishing.
2Strength
If solid board materials are used with insulation material, then mechanical strength is improved, but sound-absorbing properties are negated
Solution Approach 1:
The surface layer is designed with specific local properties that differ from the bulk insulation material. It has a denser, more structured composition that provides mechanical strength and sound reflection, while the bulk high-void-fraction insulation material maintains sound absorption. This local differentiation allows each layer to optimize its specific function without compromising the other.
Solution Approach 2:
The patent uses composite materials consisting of the high-void-fraction insulation material combined with a surface layer of structured material. This composite structure allows the material to simultaneously provide both sound absorption (from the porous insulation layer) and mechanical strength (from the surface layer), resolving the contradiction between these two properties.
3Strength
If additional covering materials are added to high-void-fraction material, then mechanical strength is improved, but CO2 footprint increases
Solution Approach 1:
By merging the insulation material and surface covering into a single product, the patent eliminates the need for additional covering materials that would increase CO2 emissions. The surface layer is integrated during the insulation material manufacturing process, ensuring that only one material system is installed rather than multiple separate materials.
Solution Approach 2:
The high-void-fraction insulation material is designed to be self-sufficient by incorporating the surface layer directly into its structure. This self-service design allows the material to provide both insulation and surface structure functions independently, without requiring additional supporting materials that would increase the environmental footprint.
Data Source
AI summary
The invention pertains to a layered high-void-fraction material comprising a composite surface layer comprising structural material and a polyester derived from an aliphatic polyol with 2-15 carbon atoms and an aliphatic polycarboxylic acid with 3 to 15 carbon atoms, wherein the surface layer is connected to a high-void-fraction layer of structural material. As compared to a high-void-fraction material without the composite surface layer, the material has, among others, improved surface properties, and improved bending stiffness, while insolation properties for both sound and heat are maintained. The material may be used, e.g., as insulating material, as filtration material, or in hydroponics.