Thermal Imaging Airflow Visualization in Absorbent Core Channels
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Solution Overview
Problem
Current methods for evaluating airflow and liquid distribution in absorbent cores of hygiene products are inadequate, as they often rely on colored liquids that can distort absorption behaviors and fail to provide clear visualization of airflow, and existing geometric features do not effectively enhance breathability.
Innovation Solution
A method using a thermal imaging camera to visualize airflow through channels in absorbent cores by loading them with warm liquid and spraying with cold fluid, along with geometric features like U-shaped channels that enhance airflow and liquid distribution, allowing for efficient fluid distribution and improved breathability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If colored liquids are used to examine absorption behaviors, then visualization of liquid distribution is achieved, but the color changes ion concentration and distorts absorption behavior
Solution Approach 1:
The patent uses air as an intermediary substance to visualize airflow patterns through the absorbent core channels. By introducing a visible tracer gas (such as helium or sulfur hexafluoride) mixed with air, the airflow paths become observable without introducing substances that would alter the core's absorption properties. This mediator approach allows visualization while maintaining the integrity of the absorption behavior being studied.
Solution Approach 2:
The patent replaces the chemical/physical interference of colored liquids with an optical detection method. Instead of using dye-containing liquids that change ion concentration, the invention uses optical sensors or imaging techniques to detect airflow patterns. This substitution eliminates the harmful chemical interaction while preserving the natural absorption mechanics.
2Object-affected harmful factors
If structural features are added to enhance airflow, then breathability is improved, but device complexity increases
Solution Approach 1:
The patent divides the absorbent core into distinct functional zones separated by channels. These channels segment the core structure into regions that can independently manage fluid and air flow. The segmentation creates pathways that enhance breathability without requiring complete structural redesign, as each segment can be optimized independently.
Solution Approach 2:
The patent utilizes porous materials with controlled pore sizes and distributions to enhance airflow while maintaining structural integrity. The porous structure provides natural capillary channels that facilitate air movement without requiring complex geometric features. This approach improves breathability through material properties rather than intricate structural designs.
3Productivity
If channels are added to the core, then liquid distribution and airflow are improved, but manufacturing complexity increases
Solution Approach 1:
The patent incorporates channels into the absorbent core during the initial manufacturing process rather than adding them as post-processing features. By pre-forming the channels within the core structure during fabrication, the liquid distribution pathways are established before the core is assembled into the final product. This preliminary action ensures proper liquid distribution while avoiding complex secondary manufacturing steps.
Solution Approach 2:
The patent designs the channels to serve multiple functions simultaneously: they facilitate liquid distribution, enable airflow pathways, and provide structural support. This multi-functionality reduces the need for separate components or features, simplifying manufacturing while achieving improved liquid and air management. The same structural element performs multiple roles, reducing overall manufacturing complexity.
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 provides a reliable and reproducible way to measure and visualize airflow and liquid distribution, enhancing the breathability and comfort of absorbent hygiene products by ensuring efficient fluid management and preventing over-saturation.
Implementation Method 1
providing a thermal imaging camera; simultaneously visually recording said absorbent core with said thermal imaging camera
Implementation Method 2
loading the absorbent core with a warm liquid, wherein said warm liquid has a temperature of greater than 30° C.
Implementation Method 3
spraying said channel(s) with a cold fluid, wherein the cold fluid has a temperature of less than 10° C.
Data Source
AI summary
A method for measuring airflow through a channel comprised in an absorbent article core, said method comprising the steps of: providing an absorbent core adapted to be sandwiched between a liquid permeable topsheet and a liquid impermeable backsheet of an absorbent article, wherein the absorbent core comprises at least one channel; providing a thermal imaging camera; loading the absorbent core with a warm liquid, wherein said warm liquid has a temperature of greater than 30° C.; simultaneously visually recording said absorbent core with said thermal imaging camera, and spraying said channel(s) with a cold fluid, wherein the cold fluid has a temperature of less than 10° C.