Absorbent Core Grooves and SAP Density for Fit
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Solution Overview
Problem
Existing absorbent cores in absorbent articles face challenges in maintaining excellent fit and absorbency due to difficulties in adjusting the average basis weight of super absorbent polymer particles, particularly in the longitudinal region, leading to issues such as reduced wearing comfort and absorbency over time.
Innovation Solution
The absorbent core is partitioned into abdomen-side, crotch, and back-side regions with a narrow part in the crotch region containing crotch region grooves, where the average basis weight of super absorbent polymer particles is higher than the overall core, and the density distribution is optimized to enhance liquid diffusion and retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the absorbent core is integrally molded with uniform distribution of super absorbent polymer particles, then the manufacturing process is simple, but the absorbency and fit in different longitudinal regions cannot be optimized
Solution Approach 1:
The patent applies local quality by creating region-specific density distributions of super absorbent polymer particles within the integrally molded absorbent core. The crotch region has a higher average basis weight of SAP particles compared to other regions, optimizing absorbency where it is most needed while maintaining manufacturing simplicity through a single molding process.
2Reliability
If the average basis weight of super absorbent polymer particles is increased in the crotch region, then the absorbency is improved, but the overall weight of the absorbent core increases
Solution Approach 1:
The patent concentrates super absorbent polymer particles in the crotch region where absorbency is most critical, rather than uniformly distributing them throughout the entire core. This localized concentration improves absorbency performance while minimizing the total weight increase of the absorbent core.
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 absorbent body achieves excellent fit and maintain high absorbency even with repeated liquid absorption, reducing the likelihood of leakage and discomfort by optimizing the distribution of super absorbent polymer particles.
Implementation Method 1
an absorbent body for an absorbent article, comprising an integrally molded absorbent core, the absorbent core comprising pulp fibers and super absorbent polymer particles
Implementation Method 2
the absorbent core comprises a plurality of crotch region grooves in the narrow part in the crotch region which extend along the longitudinal direction
Data Source
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AI summary
The purpose of the present disclosure is to provide an absorber having an exceptional fit when worn and having exceptional absorption properties. An absorber according to the present disclosure has the following configuration. An absorber (7) including an integrally formed absorption core (9) for an absorbent article, the absorption core (9) including pulp fiber (39) and super-absorbent polymer particles (37), wherein the absorber (7) is characterized in that: the absorption core (9) is provided with a narrow-width part (35) that has a low length in the width direction (W) and that is disposed in a crotch region (19); in the narrow-width part (35) in the crotch region (19), the absorption core (9) is provided with a plurality of crotch region grooves (41) that extend along the longitudinal direction (L) and that are set apart from each other in the width direction (W); and in the absorption core (9), the average basis weight of the super-absorbent polymer particles (37) in the crotch region (19) is higher than the average basis weight of the super-absorbent polymer particles (37) in the absorption core (9) as a whole.