Cellulose-Free Absorbent Structure With Segmented Pockets
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Solution Overview
Problem
Existing absorbent structures for personal hygiene products, such as diapers, face challenges in achieving flexible, thin, and lightweight designs while maintaining effective liquid absorption, distribution, and retention, often resulting in gel-blocking and reduced performance due to excessive absorbent material distribution and the use of environmentally unfriendly materials like cellulose and thermoplastics.
Innovation Solution
A cellulose-free absorbent structure comprising a carrier layer, an auxiliary layer, and absorbent polymer material with attachments formed via thermal, mechanical, or ultrasonic processes, allowing for controlled immobilization and expansion to manage fluid effectively, reducing gel-blocking and environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If cellulose fibers and thermoplastic materials are used to create absorbent structures, then structural integrity and immobilization are improved, but environmental friendliness deteriorates and product thickness increases
Solution Approach 1:
The patent removes cellulose fibers and thermoplastic materials from the absorbent structure, extracting the harmful components while retaining the essential function of immobilizing absorbent polymer material through alternative means such as physical entanglement and pocket containment
Solution Approach 2:
The patent changes the physical parameters of the absorbent structure by eliminating fibrous materials and using a different architectural approach with pockets and layers that rely on geometric constraints rather than material bonding, thereby reducing thickness and improving environmental compatibility
2Quantity of substance
If absorbent polymer material is distributed extensively to improve absorption, then absorption capability is improved, but gel-blocking occurs and retention performance deteriorates
Solution Approach 1:
The patent divides the absorbent polymer material into discrete pockets and compartments rather than distributing it extensively. This segmentation prevents gel-blocking by isolating absorbed liquid in separate zones while maintaining high absorption capability within each pocket
Solution Approach 2:
The patent concentrates absorbent polymer material in specific localized pockets rather than uniform distribution. Each pocket provides high local absorption capacity while the overall structure prevents gel-blocking through spatial separation of absorbed liquids
3Stability of the object's composition
If absorbent material is immobilized by bonding to carrier layers, then structural coherence is improved, but expansion and swelling capacity deteriorates
Solution Approach 1:
The patent segments the immobilization function into pocket structures that contain absorbent material without rigid bonding. The pockets provide structural coherence through their geometric configuration while allowing the absorbent material within them to expand and swell freely
Solution Approach 2:
The patent introduces pockets as an intermediary structure between the carrier layers and absorbent material. These pockets act as flexible containers that maintain structural coherence while permitting expansion, serving as a mediator that reconciles the conflicting requirements
4Stability of the object's composition
If pockets are provided to confine absorbent polymer material, then immobilization is improved, but distribution of liquids to absorbent areas is hindered
Solution Approach 1:
The patent designs pockets with specific local qualities including controlled size, shape, and distribution. The pockets are configured to immobilize absorbent material effectively while their arrangement and dimensions facilitate liquid distribution to absorbent areas through capillary action and gravity
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 structure enhances absorbency, distribution, and retention capabilities, reduces leakage, and minimizes material usage, resulting in a more efficient and environmentally friendly absorbent article with improved comfort and fit.
Implementation Method 1
the attachments are at least partially formed via a thermal, mechanical, thermo-mechanical and/or ultrasonic process
Implementation Method 2
the attachments are at least partially formed via a thermal, mechanical, thermo-mechanical and/or ultrasonic process
Implementation Method 3
the attachments are at least partially formed via a thermal, mechanical, thermo-mechanical and/or ultrasonic process
Implementation Method 4
the absorbent particulate polymer material is capable of absorbing, distributing and retaining liquid
Data Source
AI summary
The present invention relates to an absorbent structure, preferably for use in absorbent articles as used in the personal hygiene industry such as feminine hygiene garments, baby diapers and pants or adult incontinence garments. The present invention also relates to an absorbent article comprising such absorbent structure and to a method of manufacturing the absorbent structure. The absorbent structures comprise a carrier layer, an auxiliary layer and an absorbent material there between wherein substantially permanent primary attachments and substantially temporary secondary attachments join the carrier layer and auxiliary layer at least partially together, whereby the substantially temporary secondary attachments are loosened as a result of exposing the absorbent structure to a liquid whereas the substantially permanent primary attachments remain substantially intact. The present invention foresees in the need for improved flexible, thin, lightweight absorbent structures for an absorbent article which overcomes the absorbency problems of the prior art during absorption, distribution and retention of liquids with optimal fit.