Conductive Roofing Board Coating for Electronic Leak Detection

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Solution Overview

Problem

Existing electronic leak detection systems for roofing membranes require the application of a conductive primer in the field, which increases installation time, risks affecting the integrity of roofing materials, and results in inconsistent coating application.

Innovation Solution

Manufacturing conductive roofing boards with a pre-applied conductive coating, applied during the manufacturing process using methods like roll coating or spray coating, ensuring uniformity and curing the coating before installation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a water and/or solvent-based conductive primer is applied in the field, then the roofing structure can support electronic leak detection systems, but the installation time increases due to drying requirements

Engineering Contradiction:

Improveelectronic leak detection system functionalityVSAvoidinstallation time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The conductive coating is applied to the facer during the manufacturing process before the roofing board is installed. This preliminary action eliminates the need for field application and subsequent drying time, as the coating is already in place and cured when the board arrives at the installation site.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The conductive coating application process is extracted from the field installation process and moved to the controlled manufacturing environment. This separates the coating application from the installation timeline, allowing installation to proceed without waiting for drying.

Inventive Principle:

Principle #2Taking out (Extraction)

2Reliability

If a water and/or solvent-based conductive primer is applied in the field, then the roofing structure can support electronic leak detection systems, but the integrity of facers or boards may be compromised

Engineering Contradiction:

Improveelectronic leak detection system functionalityVSAvoidintegrity of facers or boards

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The harmful water and/or solvent components are eliminated by applying the conductive coating in a solvent-free or low-solvent formulation during manufacturing, preventing damage to the facer or board integrity that would occur with field application of traditional primers.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The coating formulation is changed from a water/solvent-based primer to a coating that can be applied and cured without harmful solvents, altering the chemical parameters to eliminate the harmful effect on roofing materials.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If a conductive primer is applied by hand in the field, then the roofing structure can support electronic leak detection systems, but the coating weight and thickness become inconsistent

Engineering Contradiction:

Improveelectronic leak detection system functionalityVSAvoidcoating weight uniformity

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The manual hand-application method is replaced with an automated coating application system used during manufacturing. This substitution of the application mechanism ensures consistent coating weight and thickness through controlled, repeatable processes rather than variable manual application.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The manufacturing process itself provides the coating application service, integrating the coating step into the board production line. This self-service approach ensures that every board receives a consistent coating during manufacturing, eliminating the variability introduced by field application.

Inventive Principle:

Principle #25Self-service

4Reliability

If excess conductive primer is applied in the field, then the roofing structure can support electronic leak detection systems, then material waste increases

Engineering Contradiction:

Improveelectronic leak detection system functionalityVSAvoidexcess primer material

Core Design Contradiction:

ReliabilityVSLoss of substance

Solution Approach 1:

The uncontrolled hand-application process is replaced with a controlled manufacturing process that precisely applies the required coating weight, preventing over-application and material waste through automated dosage control.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The manufacturing process incorporates control mechanisms that monitor and regulate the coating application, providing feedback to ensure the correct amount of coating is applied to each board, thereby preventing excess material application and waste.

Inventive Principle:

Principle #23Feedback

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

This approach reduces installation time by eliminating the need for field-applied conductive materials, ensures consistent and even conductive coverage, and prevents potential disruptions to the roofing membrane's integrity.

Implementation Method 1

laminating the polyisocyanurate foam and the facer to cure the polyisocyanurate foam

Methodology Applied

Scientific EffectPolymerization: Photopolymerisation

Implementation Method 2

exposing the roofing board and the conductive coating to a heating device to cure the conductive coating

Methodology Applied

Scientific EffectThermal curing: Heating

Data Source

PatentUS20250075504A1Commercial roofing specifically in the area of roofing insulation and coverboards

Publication Date: 2025.03.06 JOHNS MANVILLE CORP

AI summary

A method of manufacturing a conductive roofing board may include pouring a polyisocyanurate foam on top of a facer. The method may include laminating the polyisocyanurate foam and the facer to cure the polyisocyanurate foam and adhere the polyisocyanurate foam to the facer to form a roofing board. The method may include applying a conductive coating to an exposed surface of the facer, wherein the conductive coating has a coating weight of between about 0.1 lb/100 sqft and 10 lb/100 sqft. The method may include exposing the roofing board and the conductive coating to a heating device to cure the conductive coating.