High Aspect Ratio Graphite Resin for Fire Resistance and Hardness
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Solution Overview
Problem
Thermally expandable resin compositions face challenges in achieving both high expansion and high residue hardness after combustion, as high expansion typically results in reduced residue hardness.
Innovation Solution
Increasing the number of graphite pieces in the resin composition by using thermally expandable graphite with a high average aspect ratio of 20 or more, along with a resin component and an inorganic filler, to enhance both expansion and residue hardness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the expansion of the resin composition is increased to improve fire resistance, then the fire-resistant performance is improved, but the residue hardness is remarkably reduced
Solution Approach 1:
The invention changes the physical parameters of the graphite additive by specifying an aspect ratio of 5 or more, which fundamentally alters how the graphite behaves during thermal expansion. This parameter change allows the graphite to maintain structural integrity while expanding, thereby improving fire resistance without sacrificing residue hardness
Solution Approach 2:
The invention creates a composite material system combining resin composition with high aspect ratio graphite particles. This composite structure leverages the unique properties of graphite with high aspect ratio to simultaneously achieve both high expansion for fire resistance and maintained hardness for structural integrity
2Volume of stationary object
If the number of graphite pieces is increased to improve expansion, then the expansion is improved, but the residue hardness is reduced
Solution Approach 1:
The invention changes the dimensional parameters of graphite particles by specifying an aspect ratio of 5 or more, which allows for better packing and distribution of graphite pieces. This parameter optimization enables increased graphite content and improved expansion while maintaining residue hardness through efficient spatial arrangement
3Reliability
If the resin composition is designed for high expansion to prevent fire spread, then the fire resistance is improved, but the shape retention is deteriorated
Solution Approach 1:
The invention changes the geometric parameters of graphite particles by specifying an aspect ratio of 5 or more, which provides directional stability during expansion. This parameter optimization allows the material to expand uniformly while maintaining its overall shape, achieving both fire resistance and shape retention
Solution Approach 2:
The invention creates a composite structure where high aspect ratio graphite particles are distributed within the resin matrix. This composite architecture provides both the expansion needed for fire resistance and the structural framework necessary for shape retention
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 resulting thermally expandable fire-resistant resin composition exhibits excellent fire resistance, high expansion, and shape retention, enabling long-time stable extrusion molding of complex shapes like sashes.
Implementation Method 1
thermally expandable graphite has an average aspect ratio of 20 or more
Data Source
AI summary
This invention relates to a thermally expandable fire-resistant resin composition comprising a resin component in an amount of 100 parts by weight, thermally expandable graphite in an amount of 3 to 300 parts by weight, and an inorganic filler in an amount of 2 to 200 parts by weight, wherein the thermally expandable graphite has an average aspect ratio of 20 or more.