Absorbent Article Channels for Fluid Distribution and Material Reduction

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing absorbent articles face challenges in improving comfort, fit, and efficiency while reducing raw material usage and manufacturing costs, with a need for enhanced fluid distribution and absorption capabilities.

Innovation Solution

The absorbent article features longitudinally-extending channels free of absorbent material, a central absorbent zone, and lateral absorbent zones with varying basis weights, combined with a distribution layer having regions of different basis weights to optimize fluid distribution and absorption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a homogeneous distribution layer is used, then the structure is simple and manufacturing is easier, but fluid distribution efficiency is insufficient

Engineering Contradiction:

Improvefluid distribution efficiencyVSAvoiddistribution layer structure

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The distribution layer is divided into multiple regions with different basis weights: a first region with a first basis weight and a second region with a second basis weight. This local differentiation allows each region to perform its specific function optimally - the first region handles fluid acquisition while the second region distributes fluid evenly, resolving the contradiction between simple structure and efficient fluid distribution.

Inventive Principle:

Principle #3Local quality

2Reliability

If more absorbent material is used, then absorption capacity increases, but material cost and weight increase

Engineering Contradiction:

Improveabsorption capacityVSAvoidraw material usage

Core Design Contradiction:

ReliabilityVSLoss of substance

Solution Approach 1:

The absorbent core is divided into a first absorbent region with a first average basis weight and a second absorbent region with a second average basis weight. This allows concentrated placement of absorbent material where fluid accumulation is most likely, maximizing absorption capacity while minimizing overall material usage and reducing weight.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The absorbent core is segmented into multiple regions with different basis weights rather than using uniform material distribution. This segmentation enables optimized fluid distribution pathways while reducing total absorbent material required, addressing both absorption capacity and material cost concerns.

Inventive Principle:

Principle #1Segmentation

3Productivity

If channels are added to the absorbent core, then fluid distribution is improved, but structural complexity increases

Engineering Contradiction:

Improvefluid distributionVSAvoidabsorbent core structure

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The channels are integrated into the absorbent core structure itself rather than being separate components. The first and second channels are formed within the absorbent material, creating a unified structure that combines fluid distribution functionality with the absorbent core, thereby improving fluid distribution without proportionally increasing structural complexity.

Inventive Principle:

Principle #5Merging (Combining)

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 enhances fluid distribution and absorption efficiency, improves comfort, and reduces material usage, leading to cost-effective manufacturing without compromising performance.

Implementation Method 1

a distribution layer (54) between the topsheet (24) and the absorbent core (28), the distribution layer (54) having a first region (84, 85) having a first basis weight and a second region (82, 83) having a second basis weight, wherein the first basis weight and the second basis weight differ

Methodology Applied

Scientific EffectCapillary action: Capillary Action

Implementation Method 2

an absorbent core (28) between the topsheet (24) and the backsheet (25), the absorbent core (28) comprising: first and second longitudinally-extending channels (86a, 86b) substantially free of absorbent material

Methodology Applied

Scientific EffectAbsorption: Absorption (physical)

Data Source

PatentUS20250213401A1Absorbent article with a distribution layer comprising channels

Publication Date: 2025.07.03 PROCTER & GAMBLE CO

AI summary

An absorbent article comprising an absorbent core comprising: first and second longitudinally-extending channels substantially free of absorbent material; wherein the first longitudinally-extending channel is on one side of the longitudinal axis and the second longitudinally-extending channel is on the other side of the longitudinal axis, wherein the first and second longitudinally-extending channels have a length along a longitudinal axis; a central absorbent zone comprising absorbent material disposed between the first and second longitudinally-extending channels, wherein the central absorbent zone has an average basis weight; first and second lateral absorbent zones comprising absorbent material disposed transversally outwardly of the first longitudinally-extending channel and the second longitudinally-extending channel respectively, wherein the first and second lateral absorbent zones have an average basis weight; and a profiled basis weight configuration spanning the first lateral absorbent zone, the central absorbent zone, and the second lateral absorbent zone profiled in a transversal direction.