Absorbent Article Narrow Core Design Leakage Prevention
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Solution Overview
Problem
Modern personal hygiene absorbent articles face challenges with sagging due to fluid absorption, leading to increased leakage risks, particularly at the legs, while maintaining low production costs.
Innovation Solution
The absorbent article features a unique design with a fibrous distribution layer and an absorbent core that includes a narrow portion with a specific width ratio, along with core and distribution channels, to enhance fluid management and maintain fit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the height and width of the inner and outer cuffs are increased to reduce leakage, then leakage prevention is improved, but the chassis design becomes wider and material costs increase
Solution Approach 1:
The absorbent core is designed with a narrow portion at the crotch region that creates localized flexibility, allowing the cuffs to maintain contact with the wearer's thighs without increasing overall cuff dimensions. This localized structural modification provides targeted leakage prevention while avoiding the need for wider cuffs throughout the entire article.
Solution Approach 2:
The narrow portion of the absorbent core is designed to deform dynamically in response to wearer movement and fluid absorption, maintaining the three-dimensional basin shape and cuff contact. This dynamic adaptation allows the system to maintain leakage prevention performance without requiring oversized static cuff structures.
2Quantity of substance
If the absorbent core absorbs more fluid to increase capacity, then absorption capacity is improved, but the article sags and leg cuffs lose contact increasing leakage risk
Solution Approach 1:
The narrow portion of the absorbent core is designed to maintain a three-dimensional basin shape with curved surfaces that accommodate fluid absorption. This curvature allows the core to expand volumetrically while maintaining structural integrity and cuff contact, preventing sagging even as fluid capacity increases.
Solution Approach 2:
The absorbent core's structural parameters are modified by introducing the narrow portion, which changes the stress distribution and deformation characteristics. This structural parameter change allows the core to absorb more fluid while maintaining the geometric configuration needed for cuff contact and leakage prevention.
3Ease of manufacture
If the absorbent core is made thinner to reduce material usage, then material cost is reduced, but absorption kinetics are limited
Solution Approach 1:
The narrow portion introduces a dimensional variation in the absorbent core structure, creating a three-dimensional configuration that enhances fluid distribution pathways. This dimensional change allows thinner cores to achieve improved absorption kinetics by optimizing fluid flow paths and surface area exposure without increasing overall material quantity.
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 design effectively reduces leakage by maintaining better contact between leg cuffs and the wearer's thighs, while also ensuring a comfortable fit and efficient fluid handling, all while keeping production costs low.
Implementation Method 1
a fibrous distribution layer, an absorbent core... The liquid management system can quickly acquire and distribute the liquid away from the topsheet into the absorbent core
Implementation Method 2
The absorbent material typically comprises superabsorbent polymer particles (SAP) blended with cellulose fibers... Absorbent cores can absorb many times their weight of urine
Data Source
AI summary
A personal hygiene absorbent article is disclosed. The personal hygiene absorbent article includes an absorbent layer having a narrow portion between the front edge and the back edge of the absorbent layer, and a distribution layer having a narrow portion between the front edge and the back edge of the distribution layer.