Lightweight Insulation Panel Using Expanded Graphite and Swelling Clays
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Solution Overview
Problem
Current sound-absorbing and fire-resistant insulation materials face issues such as heavy weight, weakness to fire, health hazards from dust generation, and poor sound absorption performance, with existing materials like Styrofoam, glass fiber, waste timber, and cement concrete being either flammable, harmful, or inefficient.
Innovation Solution
A lightweight sound-absorbing and fire-resistant insulation panel is developed using expanded graphite and swelling clays, with a binder and flame-retardant composition, which provides excellent sound absorption, thermal insulation, and flame retardancy without sintering, simplifying manufacturing processes and reducing production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If Styrofoam is used for building insulation materials or sound absorption materials, then lightweight and good insulation and sound absorption effects are achieved, but weak durability and easiness in ignition and flash occur, generating toxic gas on fire
Solution Approach 1:
The patent uses a composite material system consisting of expanded graphite particles dispersed in a binder matrix. The expanded graphite provides fire resistance and structural integrity while the binder maintains lightweight properties and workability. This composite approach allows simultaneous achievement of light weight and fire resistance that neither material could provide alone.
2Reliability
If glass fiber is used for building insulation materials or sound absorption materials, then fire safety is achieved, but harmful dust is generated during construction and aging
Solution Approach 1:
The patent replaces durable but harmful glass fiber with a material system that prioritizes health safety. The expanded graphite-binder composite provides fire resistance without generating harmful dust during construction or aging, even if the material has different durability characteristics. This substitution eliminates the harmful dust issue while maintaining fire safety.
3Object-affected harmful factors
If waste timber is used for building insulation materials or sound absorption materials, then eco-friendliness is achieved, but weakness to fire and low sound absorption performance occur
Solution Approach 1:
The patent fundamentally changes the material parameters by using expanded graphite with its unique porous structure and carbon-based chemistry. This material inherently provides fire resistance through char formation and low thermal conductivity, eliminating the need for fire retardant treatments required for organic materials like waste timber, while maintaining eco-friendly characteristics.
4Reliability
If cement concrete materials are used for sound absorption material, then fire resistance is achieved, but high specific gravity occurs, making the product heavy
Solution Approach 1:
The patent employs expanded graphite which possesses a highly porous, flake-like structure with low density. This porous structure provides fire resistance through thermal insulation and char formation mechanisms, while the low density ensures light weight. The binder system maintains this porous structure while providing cohesion, achieving both fire resistance and light weight that cement concrete cannot provide.
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 panel achieves lightweightness, improved sound absorption, thermal insulation, and fire resistance with reduced manufacturing costs, offering better safety and performance compared to traditional materials.
Implementation Method 1
lightweight sound-absorbing and fire-resistant insulation panel
Implementation Method 2
swelling clays which could be swollen as much as 20 to 50 times in the distance between the layers
Implementation Method 3
fire-resistant insulation panel
Implementation Method 4
a binder; expanded graphite; and swelling clays
Data Source
Figure 1a~1b
Figure 1c~2a
Figure 2b~2c
AI summary
The present invention relates to a lightweight sound-absorbing and fire-resistant insulation panel including: a binder; expanded graphite; and swelling clays, and the swelling clays are formed of honeycomb-shaped layered clays containing water molecules in interlayers and have particle sizes in the range of 50 to 200 µm. Further, the expanded graphite is present in an amount of from 10 to 100 parts by weight per 100 parts by weight of the swelling clays. According to the present invention, the insulation panel is made of the expanded graphite and the honeycomb-shaped swelling clays, thus providing excellent lightweightness, sound absorption, insulation, fire resistance and flame retardancy, and further, the insulation panel is manufactured without having any sintering, thus providing simple manufacturing processes and lowering production costs.