Multi-layered Absorbent Core Fluid Management
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Solution Overview
Problem
Existing absorbent articles face challenges with leakage, poor fluid distribution, skin irritation, and bulkiness due to limitations in materials and design of the absorbent core.
Innovation Solution
A multi-layered absorbent core comprising an acquisition layer, a surge layer, a primary core, a secondary core, and an optional storage layer, each with specific materials and embossing patterns to enhance fluid management, absorption, and retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single-layer absorbent core is used, then the structure is simple and manufacturing is easy, but the fluid distribution is poor and leakage occurs
Solution Approach 1:
The absorbent core is divided into multiple functional layers: a top layer with first absorbent particles, a middle layer with second absorbent particles, and a bottom layer with third absorbent particles. Each layer segments the fluid absorption process, with each layer handling specific portions of fluid intake and distribution, thereby improving overall fluid management effectiveness while maintaining manufacturability through systematic layer construction.
2Quantity of substance
If high-absorbency materials are used to increase fluid capacity, then the absorbency is improved, but the bulkiness increases making the article uncomfortable
Solution Approach 1:
Different regions of the absorbent core are assigned different absorbent particle types with varying absorption characteristics. The top layer uses first absorbent particles optimized for rapid fluid intake, the middle layer uses second absorbent particles for fluid distribution, and the bottom layer uses third absorbent particles for fluid retention. This local differentiation allows high overall absorbency while minimizing bulkiness by optimizing each region's contribution.
Solution Approach 2:
The absorbent core employs a composite structure combining multiple types of absorbent particles (first, second, and third absorbent particles) with different physical and chemical properties. This composite approach enables the system to achieve high fluid absorption capacity while controlling bulkiness through the synergistic effects of different particle types working together in layered configuration.
3Speed
If quick-absorbency materials are used, then the fluid intake rate is improved, but the fluid re-wetting occurs compromising skin health
Solution Approach 1:
The top layer of the absorbent core is designed with first absorbent particles that perform preliminary rapid absorption of fluid upon contact. This preliminary action quickly captures the bulk of the fluid, preventing it from reaching the skin surface. The subsequent middle and bottom layers then handle fluid distribution and retention, working together to prevent re-wetting while maintaining fast initial absorption response.
4Reliability
If the absorbent core is made thicker to increase absorbency, then the fluid management is improved, but the wearer comfort is reduced due to bulkiness
Solution Approach 1:
Instead of using a single thick layer, the absorbent core is segmented into multiple thinner functional layers. Each layer is optimized for specific fluid management tasks (intake, distribution, retention), achieving effective fluid management through coordinated action of thinner layers rather than a single bulky thick layer, thereby maintaining wearer comfort.
Solution Approach 2:
The absorbent core transitions from a single-dimensional thick structure to a multi-dimensional layered architecture. By organizing absorbent particles in vertical layers with different functions, the system achieves enhanced fluid management effectiveness without proportionally increasing bulkiness, as each layer contributes efficiently to the overall performance while maintaining a compact profile.
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 multi-layered absorbent core effectively manages fluid intake and distribution, reduces leakage and re-wetting, and minimizes bulkiness, thereby enhancing wearer comfort and skin health.
Implementation Method 1
The surge layer can include a high permeability super absorbent polymer, which is essential for managing one or more significant fluid surges and distributing such fluid surges evenly across the core
Implementation Method 2
The primary core can include a mix of super absorbent polymer and fluff, with the super absorbent polymer proportion specifically tailored to optimize fluid absorption and retention
Implementation Method 3
The primary core can be embossed with a straight pattern and can include a primary elongate void to facilitate rapid fluid absorption and prevent leakage
Data Source
AI summary
An absorbent article designed for improved fluid management is provided. The absorbent article features a multi-layered absorbent core comprising an acquisition layer, a surge layer, primary and secondary cores, and an optional storage layer. Each layer can be configured to optimize fluid intake, distribution, and retention, enhancing the overall performance of the article. The surge layer includes a super absorbent polymer with specific absorption rates and capacities, while the primary and secondary cores are designed with embossed patterns and voids to facilitate fluid movement and increase absorption efficiency. The absorbent core design reduces leakage, minimizes re-wetting, and decreases bulkiness, thereby improving wearer comfort and discretion. This technology is applicable to various types of absorbent articles, including diapers, training pants, and incontinence pads, addressing the needs of diverse user groups.