Micro-perforated Metal Screen with Breathable Waterproof Coating
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Solution Overview
Problem
Current heat shields with layered constructions face limitations in long-term resistance and mechanical stress absorption due to the juxtaposition of different layers, which compromises their permeance, impermeability, and durability.
Innovation Solution
A method involving a micro-perforated metal sheet coated with a breathable and waterproof thermoplastic polymer layer, where the metal sheet is rolled to ensure flatness and uniformity, and hot coating is used to seal the micro-perforations, enhancing adhesion and mechanical resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple layers are juxtaposed to achieve permeance and impermeability, then the screen obtains the required protective properties, but the resistance over time and mechanical stress absorption are limited
Solution Approach 1:
The patent merges multiple functional layers into a single integrated structure where the breathable waterproof layer is directly coated onto the micro-perforated metal sheet, eliminating the need for separate adhesive layers and intermediate structures. This consolidation maintains all required protective properties while improving long-term resistance and mechanical stress absorption.
Solution Approach 2:
The invention creates a composite structure combining a micro-perforated metal sheet with a breathable waterproof polymer coating in a single laminated element. This composite material approach allows the screen to achieve both permeance and impermeability while improving mechanical properties and durability compared to traditional layered constructions.
2Strength
If multiple layers are juxtaposed to achieve permeance and impermeability, then the screen obtains the required protective properties, but the mechanical stress absorption is restricted
Solution Approach 1:
The patent combines the metal sheet and polymer coating into a single integrated structure that acts as one cohesive unit for absorbing mechanical stresses, eliminating the weaknesses of separate layered constructions while maintaining all protective functions.
Solution Approach 2:
The composite structure of metal sheet with polymer coating provides superior mechanical stress absorption compared to traditional layered constructions, while the single-element design simplifies the overall structure and improves durability.
3Reliability
If a coating is applied to seal micro-perforations, then impermeability is achieved, but the coating material may flow through the perforations during application
Solution Approach 1:
The patent applies a size agent to the micro-perforated metal sheet before coating to prevent the coating material from flowing through the perforations during application. This preliminary action ensures clean coating application while maintaining the integrity of the micro-perforations for the final impermeable seal.
Solution Approach 2:
The size agent acts as an intermediary substance that temporarily blocks the micro-perforations during coating application, preventing coating material from penetrating through. After coating, the size agent is removed to allow the final impermeable seal to form properly.
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 impermeable screen exhibits improved mechanical resistance, enhanced durability, and better permeance and impermeability, forming a monolithic assembly that effectively absorbs mechanical stresses and maintains thermal barrier properties.
Implementation Method 1
an evaporation phase during which the water contained in the product aqueous film-forming product is evaporated
Implementation Method 2
the coating step consists of hot coating
Implementation Method 3
Metal foil 102 forms a thermal reflection barrier
Data Source
Figure 1~2
AI summary
The invention relates to a method (200) for producing an impermeable screen, said production method (200) comprising: a supply step (202) during which a metal sheet with micro-perforations is supplied; a laminating step (208) during which the micro-perforated metal sheet is laminated; and a coating step (206) during which a layer made of a breathable and impermeable material is applied to the surface of the metal sheet laminated in this way.