Disposable Absorbent Pad Layering for Skin Dryness and Strength
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Solution Overview
Problem
Current products do not effectively address the need for an absorbent pad that maintains skin dryness, protects bed and linens, allows air circulation, and enables caregivers to reposition bedridden patients without compromising skin health or hygiene.
Innovation Solution
The absorbent pad consists of multiple layers, including a fluid-permeable first layer, a super-absorbent second layer, and a base layer with hydrophobic and breathable properties, designed to absorb moisture, prevent leakage, allow air circulation, and maintain strength even when wet.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple disposable underpads are combined to absorb moisture and protect bedding, then moisture absorption and protection improve, but the products increase shear and friction on the patient's skin, and the layers slide and shift against each other
Solution Approach 1:
The patent combines multiple functional layers (fluid-acquisition layer, fluid-distribution layer, absorbent core, and leak-protection layer) into a single integrated underpad structure. This merging eliminates the sliding and shifting problems associated with multiple separate layers while maintaining effective moisture absorption and protection. The layers are bonded together to prevent relative motion, thereby reducing shear and friction on the patient's skin.
Solution Approach 2:
The underpad utilizes composite material construction with different functional layers made from specialized materials. The fluid-acquisition layer uses hydrophilic materials, the absorbent core uses superabsorbent polymers, and the leak-protection layer uses hydrophobic materials. This composite structure provides optimized performance for each function while working together as a unified system that minimizes skin friction.
2Reliability
If reusable cloth underpads are used to protect bed and linens and enable patient lifting, then protection and repositioning capability improve, but air circulation is prevented, causing heat buildup
Solution Approach 1:
The underpad incorporates porous materials in the fluid-distribution layer and absorbent core that allow air to pass through while maintaining structural integrity. This porosity enables air circulation to prevent heat buildup between the underpad and patient's skin, while the overall structure remains strong enough to support patient lifting and repositioning activities.
3Reliability
If conventional disposable pads are used to absorb moisture, then moisture absorption improves, but the pads disintegrate when wet, losing strength for patient repositioning
Solution Approach 1:
The underpad uses composite materials where the absorbent core contains superabsorbent polymers bonded to a three-dimensional network structure. This composite structure allows the material to absorb large amounts of fluid while maintaining structural integrity and tensile strength. The bonding network prevents disintegration even when fully saturated, enabling safe patient repositioning.
Solution Approach 2:
Different regions of the underpad have specialized local properties: the fluid-acquisition layer has high fluid uptake capability, the fluid-distribution layer has controlled porosity for even distribution, and the leak-protection layer has hydrophobic properties. Each local region is optimized for its specific function while contributing to overall structural strength when wet.
4Reliability
If the absorbent pad is made thick to improve moisture absorption and protection, then absorption capacity improves, but the thickness interferes with pressure management beds and surfaces that distribute weight
Solution Approach 1:
The underpad is segmented into thin functional layers, each performing a specific function. The fluid-acquisition layer, fluid-distribution layer, absorbent core, and leak-protection layer are arranged in thin sequences that collectively provide high absorption capacity without excessive overall thickness. This segmentation allows the underpad to be thin enough to work with pressure management beds while maintaining effective moisture management.
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 pad effectively maintains skin dryness, protects bedding, allows for air circulation to prevent heat buildup, and retains strength for patient repositioning, even when wet, thus addressing the limitations of existing products.
Implementation Method 1
a fluid-permeable first layer, a super-absorbent second layer
Implementation Method 2
super absorbent material
Implementation Method 3
a base layer with hydrophobic and breathable properties
Implementation Method 4
breathable properties... allowing air circulation
Implementation Method 5
allow air circulation... to prevent heat buildup
Data Source
AI summary
The present invention relates to a disposable absorbent pad comprising multiple layers. In particular, the absorbent pad of the present invention maintains skin dryness by absorbing moisture while preventing leakage to the skin or the bed linens, allowing air circulation at the surface of the patient's skin to prevent heat buildup, and is strong enough to allow the patient to be repositioned, even when the pad is wet. In a particular embodiment the first layer is comprised of a fluid-permeable, porous material, the second layer is disposed under the first layer and is comprised of at least one super absorbent material, and a base layer disposed under the second layer.