Regionally Weighted Absorbent Assembly for Leakage Security
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Solution Overview
Problem
Existing disposable absorbent hygiene products face challenges in achieving effective liquid handling and leakage security while minimizing material usage and cost, particularly in incontinence products for adults, which often require large dimensions to fit the urogenital area and ensure proper fit.
Innovation Solution
A disposable absorbent hygiene product design with an absorbent assembly divided into front, central, and back regions, where the central region concentrates 70-100% of the absorption capacity, using a mixture of cellulosic fibers and super absorbent polymers, and the front and back regions extend the total length for enhanced liquid handling and fit, while maintaining a low cellulosic fiber basis weight for cost efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the absorbent assembly uses uniform distribution of absorption materials throughout its length, then the product provides consistent absorption along the entire length, but material usage and cost increase unnecessarily in regions where less absorption is needed
Solution Approach 1:
The absorbent assembly implements non-uniform distribution of absorption materials with different basis weights in different longitudinal regions. The front and back regions have a first basis weight (50-200 g/m²), while the central region has a second basis weight (200-500 g/m²). This local quality differentiation ensures sufficient absorption capacity is concentrated where liquid exudate is most likely to occur (central region), while reducing material usage in front and back regions where less absorption is needed, thus resolving the contradiction between material usage and liquid handling performance.
Solution Approach 2:
The patent applies parameter changes by varying the basis weight parameter of the absorbent assembly along its longitudinal direction. The basis weight is changed from 50-200 g/m² in front and back regions to 200-500 g/m² in the central region. This parameter variation optimizes the distribution of absorption capacity to match the actual liquid handling needs at different positions, reducing overall material usage while maintaining reliable liquid handling performance where it is most critical.
2Reliability
If the absorbent assembly is made with higher material quantity to ensure adequate absorption capacity, then liquid handling and leakage security improve, but product cost and material usage increase
Solution Approach 1:
The absorbent assembly uses local quality differentiation with higher basis weight (200-500 g/m²) concentrated in the central region where liquid handling and leakage security are most critical, while using lower basis weight (50-200 g/m²) in front and back regions. This strategic material distribution ensures adequate absorption capacity and leakage security are provided where needed, while minimizing overall material usage and product cost.
Solution Approach 2:
The patent implements parameter changes by varying the basis weight parameter along the longitudinal direction of the absorbent assembly. The central region has a higher basis weight parameter (200-500 g/m²) to ensure reliable liquid handling and leakage security, while front and back regions have a lower basis weight parameter (50-200 g/m²). This parameter optimization achieves the required leakage security with reduced overall material usage and cost.
3Quantity of substance
If the absorbent assembly uses lower cellulosic fiber basis weight to reduce cost, then material cost decreases, but absorption capacity may be insufficient in critical regions
Solution Approach 1:
The absorbent assembly applies local quality by using lower cellulosic fiber basis weight (50-200 g/m²) in front and back regions where cost reduction is prioritized, and higher basis weight (200-500 g/m²) in the central region where absorption capacity is critical for reliable liquid handling. This spatial differentiation of material quality reduces overall material cost while ensuring sufficient absorption capacity in the most critical central region.
Solution Approach 2:
The patent uses parameter changes to vary the basis weight parameter along the longitudinal direction, with 50-200 g/m² in front and back regions and 200-500 g/m² in the central region. This parameter optimization reduces material cost in less critical areas while maintaining adequate absorption capacity in the central region where liquid handling reliability is most important.
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 design provides improved absorption capacity where needed, enhances user confidence through moisture absorption and fit, and reduces material usage, thereby improving comfort and leakage security while maintaining cost-effectiveness.
Implementation Method 1
an absorbent assembly arranged between the topsheet and the backsheet. The absorbent assembly has a longitudinal length of from 500 to 1000 mm and a transversal width of from 200 to 450 mm
Implementation Method 2
the absorbent assembly comprises cellulosic fibers, optionally mixed with super absorbent polymers, with a super absorbent polymer concentration of from 0 to 30 wt %, and a cellulosic fiber basis weight of from 50 to 200 g/m2
Data Source
AI summary
A disposable absorbent hygiene product is provided, including a main part having a body facing surface intended to face the body of a user and a garment facing surface intended to face away from the body of a user. The main part includes a liquid permeable topsheet at the body facing surface, a liquid impermeable backsheet at the garment facing surface, and an absorbent assembly arranged between the topsheet and the backsheet. In front and back regions of the absorbent assembly, the absorbent assembly includes cellulosic fibers mixed with super absorbent polymers, with a central region of the absorbent assembly providing from 70% to 100% of the total retention capacity of the absorbent assembly.