Flame Retardant Foam Substrate Curing Process
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Solution Overview
Problem
Commercial aircraft insulation materials face challenges in meeting stringent flammability tests, particularly radiant panel flammability, vertical burn, and combustion smoke generation regulations, making it difficult for foam insulation materials to consistently pass these tests.
Innovation Solution
A method involving a foam substrate treated with a flame-retardant solution containing organic phosphate esters in water, where the substrate is cured at elevated temperatures for extended periods, and optionally mechanically deformed to enhance penetration and distribution of the solution, ensuring compliance with flammability regulations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If foam insulation materials are used to provide lightweight thermal and acoustic insulation, then weight reduction and ease of installation are achieved, but flammability requirements are not met
Solution Approach 1:
The patent applies parameter changes by modifying the chemical composition parameters of the foam material through controlled decomposition reactions. When exposed to fire, the foam undergoes thermal decomposition that releases non-flammable gases (carbon dioxide and water vapor), effectively changing the material's flammability parameter from combustible to flame-retardant. This resolves the contradiction by maintaining the lightweight foam structure while achieving fire resistance through chemical parameter transformation.
Solution Approach 2:
The patent utilizes phase transitions in the form of thermal decomposition reactions. The foam material undergoes endothermic decomposition when exposed to heat, transitioning from a solid foam structure to a charred residue while releasing non-flammable gases. This phase transition process absorbs heat and prevents flame propagation, resolving the contradiction between lightweight foam construction and fire safety requirements.
2Object-affected harmful factors
If traditional mineral-based insulation materials are used to meet flammability requirements, then fire resistance is achieved, but installation complexity and manufacturing costs increase
Solution Approach 1:
The patent creates a composite material system by combining organic foam base material with flame-retardant chemical additives. This composite structure integrates the advantages of both lightweight foam and fire-resistant properties into a single material that maintains ease of installation while achieving fire safety. The composite material approach eliminates the need for separate mineral insulation layers, reducing installation complexity.
3Object-affected harmful factors
If foam materials are treated with flame-retardant solutions to improve fire resistance, then flammability requirements are met, but processing time and curing requirements increase
Solution Approach 1:
The patent applies preliminary action by pre-incorporating flame-retardant chemicals into the foam material during the manufacturing process or through pre-treatment before installation. This preliminary incorporation ensures that the fire-retardant properties are already embedded in the material, eliminating the need for extended post-installation curing times and allowing immediate compliance with flammability requirements.
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 treated foam exhibits improved resistance to flame propagation while maintaining its original thermal and acoustic properties, flexibility, and lightweight characteristics, thus meeting rigorous flammability requirements.
Implementation Method 1
the flame-retardant solution includes an organic phosphate ester in water, wherein, after contacting, the foam substrate was cured at a predetermined temperature for a predetermined amount of time
Data Source
Figure 1
AI summary
A method for making a flame propagation foam from a foam substrate including the steps of preparing a flame-retardant solution that includes an organic phosphate ester in water, immersing the foam substrate in the flame-retardant solution to obtain a partially treated foam substrate and curing the partially treated foam substrate at a predetermined temperature for a predetermined amount of time.