Mineral Wool Thermal Stability via Phosphorus Coating
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional mineral wool fiberizing processes face challenges in achieving thermal stability, mechanical properties, and biodegradability, particularly due to the sensitivity of phosphates to moisture and temperature, which affects adhesion and long-term stability in fire-resistant applications.
Innovation Solution
A thermally stable mineral wool with a specific chemical composition, including SiO2, Al2O3, CaO, MgO, and P2O5, combined with a phosphorus compound linked to carbon, which forms a refractory coating on the fibers, enhancing thermal stability and solubility in a physiological medium, and is fiberized using an internal centrifugal process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If phosphates or polyphosphates are used to form refractory coating on mineral wool fibers, then thermal stability is improved, but sensitivity to moisture and temperature increases, affecting adhesion and long-term stability
Solution Approach 1:
The invention changes the chemical composition parameters by incorporating specific amounts of P2O5 (0.5-5.0 wt%) along with controlled levels of Al2O3 (15-30 wt%), CaO (10-25 wt%), and MgO (5-20 wt%) to optimize both thermal stability and moisture resistance. This compositional adjustment allows the formation of refractory coating while reducing sensitivity to environmental factors
Solution Approach 2:
The invention creates a composite mineral wool material combining multiple oxide components (SiO2, Al2O3, CaO, MgO, P2O5) in specific proportions. This composite approach enables the material to simultaneously achieve thermal stability from phosphorus compounds, moisture resistance from balanced composition, and improved adhesion properties
2Temperature
If mineral wool is made thermally stable with high temperature resistance, then fire resistance capability is improved, but biodegradability and solubility in physiological medium may be compromised
Solution Approach 1:
The invention optimizes the chemical composition parameters by controlling P2O5 content (0.5-5.0 wt%) alongside Al2O3 (15-30 wt%), CaO (10-25 wt%), and MgO (5-20 wt%) to achieve a balance between thermal stability and biodegradability. This parameter optimization allows the material to resist high temperatures while maintaining solubility in physiological media
Solution Approach 2:
The invention applies local quality by forming a refractory coating on the fiber surfaces through phosphorus compounds that react above 100°C, while the core fiber composition remains optimized for biodegradability. This creates a dual-characteristic material with thermally stable surface and biodegradable interior
3Stability of the object's composition
If phosphorus compounds are added to improve thermal stability, then fire resistance is enhanced, but adhesion between fibers and resin-based binder may be reduced
Solution Approach 1:
The invention optimizes the phosphorus compound content parameter (0.5-5.0 wt% P2O5) in conjunction with other compositional parameters (Al2O3: 15-30 wt%, CaO: 10-25 wt%, MgO: 5-20 wt%) to achieve optimal balance between thermal stability and adhesion. This controlled parameter adjustment prevents excessive phosphorus that would harm adhesion while maintaining sufficient thermal resistance
Solution Approach 2:
The invention applies preliminary action by depositing phosphorus compounds on the fiber surfaces before resin binder application. This preliminary coating forms refractory characteristics while the controlled composition ensures subsequent resin adhesion is not compromised, solving both requirements in sequence
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 mineral wool with improved mechanical and thermal stability, maintaining insulation properties at high temperatures and ensuring biosolubility, thus addressing the limitations of existing technologies in fire-resistant construction systems.
Implementation Method 1
said phosphorus compound being capable of reacting at a temperature below 1000° C. with said fibers in order to form a coating on the surface of said fibers
Implementation Method 2
a biodegradability of the mineral wool, namely its capability of rapidly dissolving in a physiological medium
Data Source
AI summary
The invention relates to thermally-stable mineral wool which can dissolve in a physiological medium, comprising fibres containing the following constituents, expressed in percentage by weight, namely: 35-60 % SiO2, preferably 39-55 %; 12-27% Al2O3, preferably 16-25%; 0-35% CaO, preferably 3-25%; 0-30% MgO, preferably 0-15%; 0-17% Na2O, preferably 6-12%; 0-17% K2O, preferably 3-12%; 10-17% R2O (Na2O+K2O), preferably 12-17%; 0-5% P2O5, preferably 0-2%; 0-20% Fe2O3; 0-8% B2O3, preferably 0-4%; and 0-3% TiO2, and at least one phosphorous compound that can react with said fibres at a temperature of less than 1000° C. in order to form a coating on the surface thereof. The invention is characterised in that the phosphorous content of said compound, as expressed in phosphorus atom weight, varies between 0.0005%, in particular more than 0.01%, and 1%, in particular less than 0.5%, of the total weight of the fibres. The invention is also characterised in that a phosphorus compound is a molecule in which the phosphorus atom(s) are bound to at least one carbon atom either directly or by means of an oxygen atom.