Porous Polymer Layer for Automatic Wet Surface Detection
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Solution Overview
Problem
Wet surfaces, such as floors and pavements, pose a safety hazard due to the risk of slippage, and existing methods like placing warning signs are inefficient as they require human intervention and storage, while spills of flammable liquids and water on roofs can cause damage and are difficult to monitor.
Innovation Solution
A laminated product with a first layer carrying an indication and a second layer comprising a porous polymer that is opaque when dry and transparent when wet, revealing the indication without human intervention, which can be used on various surfaces to monitor liquid presence and alert users to hazards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If warning signs are placed on wet surfaces, then safety hazard is indicated, but human intervention and storage space are required
Solution Approach 1:
The floor covering automatically indicates wet surfaces through the optical property change of its porous polymer layer when absorbing liquid, eliminating the need for human intervention to place or remove warning signs. The system serves itself by detecting and signaling the hazardous condition autonomously.
Solution Approach 2:
The patent replaces the mechanical system of physically placing and removing warning signs with an optical detection system. The porous polymer layer's refractive index change upon liquid absorption triggers an automatic visual signal, substituting manual mechanical action with an automated optical indication mechanism.
2Reliability
If warning signs are placed on wet surfaces, then safety hazard is indicated, but response time is delayed
Solution Approach 1:
The floor covering is pre-configured with the porous polymer layer and indication mechanism during manufacturing, so that it is immediately ready to detect and signal wet conditions as soon as liquid contact occurs, eliminating the time delay associated with retrieving and placing warning signs after a spill happens.
Solution Approach 2:
The automated optical detection system replaces the delayed mechanical process of human response, enabling immediate detection and signaling of wet conditions the moment liquid contacts the surface, thus eliminating response time delays.
3Extent of automation
If porous polymer layer is used, then automatic indication is achieved, but material complexity increases
Solution Approach 1:
The patent employs a porous polymer layer within the floor covering structure that automatically changes its optical properties when liquid is absorbed. This porous material serves dual purposes: it detects the presence of liquid through refractive index changes and provides the mechanism for automatic visual indication, achieving automation without requiring complex external sensing systems.
Solution Approach 2:
The floor covering is designed as a composite structure integrating the porous polymer layer with the base flooring material and indication elements. This composite approach combines multiple materials with complementary properties to achieve automatic liquid detection and signaling while maintaining structural integrity and aesthetic appearance.
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 product automatically alerts users to wet surfaces or liquid presence, reducing the risk of accidents and damage by providing a visible warning without the need for human placement of signs, and can be used on floors, roofs, and other surfaces to monitor humidity and liquid presence effectively.
Implementation Method 1
the second layer is opaque when dry such that the indication is masked and transparent when wet such that the indication is revealed
Data Source
AI summary
A product (20) for use on a surface or as part of a surface, the product comprising: a first layer (22) which carries an indication; and a second layer (26) which overlies at least a portion of the first layer (22), the second layer (26) comprising a porous polymer; wherein the second layer (26) is opaque when dry such that the indication is masked and transparent when wet such that the indication is revealed.