Intumescent Layered Composite Poles for Fire Resistance
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Solution Overview
Problem
Traditional composite utility poles are susceptible to fire damage, which reduces their strength and lifespan, and existing fire-resistant solutions compromise the cohesion of the resin matrix or require time-consuming and expensive coating processes.
Innovation Solution
A method involving the systematic application of structural layers with intumescent infused resin coatings and a spirally wrapped intumescent veil layer, followed by a final intumescent infused coating, using materials like high temperature mineral fibers, exfoliating graphite, and alumina trihydrate to enhance fire resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If fire-resistant additives are added to the resin matrix during manufacture, then fire resistance is improved, but the cohesion of the resin matrix to the fiberglass is reduced
Solution Approach 1:
The fire protection function is segmented from the structural resin matrix. Instead of mixing fire-resistant additives throughout the entire resin matrix, the patent applies intumescent coatings only on the outer surface of the composite pole, separating the fire protection function from the structural bonding function.
Solution Approach 2:
Fire-resistant properties are applied locally only where needed for fire protection (the outer surface exposed to fire), rather than throughout the entire resin matrix. The intumescent coating provides fire resistance at the surface while the underlying resin matrix maintains its full cohesive strength for bonding fiberglass.
2Object-affected harmful factors
If a fireproofing coating is applied to the outside of a fully formed pole, then fire resistance is improved, but manufacturing time and expense are increased
Solution Approach 1:
The intumescent coating is applied during the manufacturing process itself, before the pole is completed and shipped. This preliminary application of fire protection eliminates the need for separate post-manufacturing coating steps, reducing overall time and expense.
Solution Approach 2:
The fireproofing coating application is merged with the existing manufacturing process steps. The intumescent coating is applied as part of the pole fabrication process rather than as a separate post-processing step, combining multiple functions into a unified manufacturing workflow.
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 method enhances the fire resistance of composite poles, maintaining structural integrity and reducing the risk of damage from high temperatures while avoiding the drawbacks of previous solutions.
Implementation Method 1
the present invention relates to an improved fire resistant composite pole which incorporates an intumescent layer within the bonded layers of the pole
Implementation Method 2
High temperatures around a composite pole can reduce the pole's strength and lifespan. Additionally, high temperatures can damage internal wires and cables
Implementation Method 3
using materials like high temperature mineral fibers, exfoliating graphite, and alumina trihydrate to enhance fire resistance
Data Source
AI summary
The present invention provides an improved fire resistant composite pole and a method for producing the same. In accordance with preferred embodiments, the composite utility pole of the present invention includes a composite structure having integrally bonded layers of resin impregnated fiberglass extending along the length of the pole. According to a preferred embodiment, the composite structure of the pole includes an intumescent layer which includes: high temperature mineral fibers, exfoliating graphite, organic binders. and alumina trihydrate (ATH).