Fire-Resistant Coating on Carrier Veil
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for applying fire-resistant coatings to substrates, such as wood products, are inefficient and inconsistent, leading to challenges in achieving uniform thickness and desired fire-resistant properties, and can compromise the structural integrity of the materials over time.
Innovation Solution
A method involving a pliable carrier veil coated with a fire-resistant substance, such as a magnesium oxychloride slurry, is drawn through rollers to control the coating thickness and applied over a substrate, with heat used to accelerate curing, eliminating the need for adhesives and ensuring a consistent fire-resistant layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fire retardant chemicals are impregnated into cellulosic materials under pressure, then fire resistance is improved, but structural stability deteriorates and process complexity increases
Solution Approach 1:
The fire protection system is segmented into two independent parts: (1) a fire-resistant coating layer applied on the surface of the substrate, and (2) the substrate itself which maintains its original structure. The coating is applied to the surface without penetrating into the substrate's cellular structure, thus preserving the substrate's structural stability while providing fire resistance through the separate coating layer.
Solution Approach 2:
A carrier veil serves as an intermediary between the fire-resistant coating and the substrate. The veil is impregnated with fire-retardant chemicals and then applied to the substrate surface, acting as a buffer that provides fire protection without requiring direct impregnation of the substrate, thereby maintaining structural integrity.
2Ease of operation
If fire retardant coatings are applied by brushing or spraying, then application flexibility is improved, but coating uniformity deteriorates
Solution Approach 1:
The manual or semi-automatic brushing/spraying mechanical system is replaced with a controlled coating apparatus that uses rollers or extruders to apply the fire-resistant coating. This mechanical substitution enables precise control of coating thickness and uniformity through controlled dispensing mechanisms while maintaining operational efficiency.
Solution Approach 2:
The coating application process controls the volume, viscosity, and flow rate of the fire-resistant coating material to achieve uniform thickness. By adjusting these parameters during application, the system ensures consistent coating quality across the entire substrate surface while maintaining operational flexibility.
3Reliability
If multiple layers of fire retardant coating are applied to build sufficient volume, then fire resistance is improved, but production time increases
Solution Approach 1:
The carrier veil is pre-impregnated with fire-retardant chemicals before application to the substrate. This preliminary impregnation allows a single layer application to provide sufficient fire-resistant properties, eliminating the need for multiple sequential coating layers and the associated drying/curing time between applications.
Solution Approach 2:
The system uses a composite structure combining the carrier veil impregnated with fire-retardant chemicals and the substrate. This composite approach consolidates multiple functions (structural support, fire resistance, and chemical impregnation) into a single integrated component, reducing the number of application steps required.
4Reliability
If fabric impregnation with fire retardant coating is performed, then fire resistance is improved, but coating consistency deteriorates due to fabric variability
Solution Approach 1:
The system applies fire-resistant coating with controlled local distribution, ensuring that the coating volume and concentration are uniformly managed across different areas. The coating apparatus controls the dispensing to account for variations in substrate or veil properties, maintaining consistent fire-resistant properties throughout the entire surface.
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 method enables efficient, consistent, and durable fire-resistant coating applications that maintain structural integrity and enhance fire resistance without the use of adhesives, reducing production costs and improving scalability.
Implementation Method 1
applying heat to the coated carrier veil sufficient to accelerate a curing reaction in the fire-resistant substance
Data Source
AI summary
A method for coating a fire-resistant substance onto a carrier veil and products containing fire-resistant substances are provided. The method includes delivering a pliable carrier veil in a traveling web, drawing the carrier veil web through a reservoir defined by a nip of two rollers and containing the fire-resistant substance, where the carrier veil is coated with the fire-resistant substance. The method also includes controlling the amount of fire-resistant substance on the carrier veil web by setting a nip dimension between the two rollers, passing the carrier veil through the nip of the two rollers and providing the fire-resistant substance as a slurry suitable to coat the veil exiting the nip with a layer effective to provide a selected fire resistance.