Expandable Graphite Coating for Flame-Resistant Roofing Membranes
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Solution Overview
Problem
Coated fabrics used in construction lack effective flame resistance and resistance to flame spread, which poses risks in fire-prone applications.
Innovation Solution
Incorporating expandable graphite into the coating of fabrics, combined with a polymeric binder and optional additional binders and fillers, to create a fire-resistant and flame-retardant material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional coating materials (mineral pigment, polymer latex adhesive, inorganic binder) are used, then the coating provides basic protective functions, but the flame resistance and resistance to flame spread are insufficient
Solution Approach 1:
The patent applies composite materials by combining expandable graphite with conventional coating materials (polymer latex adhesive, inorganic binder, mineral pigment) to create a multi-component coating system. This composite approach integrates the fire-retardant properties of expandable graphite with the adhesive and protective functions of conventional materials, achieving both basic protection and enhanced flame resistance simultaneously
Solution Approach 2:
The patent utilizes parameter changes by incorporating expandable graphite particles that undergo dramatic volumetric expansion when exposed to fire temperatures. This phase transition transforms the graphite from a compact state to an expanded foam-like structure, creating an insulating barrier that changes the thermal parameters of the coating system and prevents flame spread
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 coated fabrics exhibit enhanced fire resistivity and resistance to flame spread, making them suitable for use in construction materials that require improved flame resistance.
Implementation Method 1
expandable graphite dispersed throughout the binder
Data Source
AI summary
A method for preparing a roofing membrane in the form of a roll, comprising the steps of: providing a polymeric membrane; providing a fabric having a coating disposed thereon; attaching the polymeric membrane to the fabric to form a composite; and rolling the composite. Wherein the coating includes expandable graphite dispersed within a binder.