Multiple-Body Diaper with Leg Cuffs for Reusable Containment

Solution Overview

Problem

Existing diaper articles with multiple absorbent bodies face challenges in maintaining containment and wear comfort during both initial and subsequent uses, and there is a need for sustainable material usage.

Innovation Solution

A pant-type absorbent article with a first absorbent body and a second absorbent body, each comprising specific components like permeable and impermeable layers, cuffs, and elastic elements, designed to allow easy removal of the first absorbent body while maintaining leg tensile strength and preventing leakage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Duration of action of moving object

If a single absorbent body is used in traditional diaper articles, then the structure is simple and easy to manufacture, but the diaper cannot be reused after soiling and requires complete removal and replacement

Engineering Contradiction:

Improveusage durationVSAvoidstructure complexity

Core Design Contradiction:

Duration of action of moving objectVSDevice complexity

Solution Approach 1:

The diaper article is divided into a reusable chassis and a removable first absorbent body. The chassis contains a second absorbent body that remains in place after the first absorbent body is removed, enabling reuse. This segmentation allows the diaper to be used multiple times while maintaining a relatively simple overall structure.

Inventive Principle:

Principle #1Segmentation

2Duration of action of moving object

If multiple absorbent bodies are stacked, then reuse is enabled, but the leg opening containment and wear comfort deteriorate after removal of the first absorbent body

Engineering Contradiction:

Improveusage durationVSAvoidcontainment performance

Core Design Contradiction:

Duration of action of moving objectVSReliability

Solution Approach 1:

The chassis is pre-configured with a second absorbent body and cuff structures that are designed to provide adequate containment and wear comfort even after the first absorbent body is removed. The cuff elastic elements and leg opening structures are positioned and sized to ensure proper fit and leakage prevention during reuse.

Inventive Principle:

Principle #10Preliminary action

3Loss of substance

If the first absorbent body is removed, then material conservation is achieved, but the leg opening tensile strength and containment may be compromised

Engineering Contradiction:

Improvematerial wasteVSAvoidleg tensile strength

Core Design Contradiction:

Loss of substanceVSStrength

Solution Approach 1:

The diaper article is divided into a reusable chassis and a removable first absorbent body. The chassis contains a second absorbent body that remains in place after the first absorbent body is removed, enabling reuse. This segmentation allows the diaper to be used multiple times while maintaining a relatively simple structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The chassis is pre-configured with a second absorbent body and cuff structures that are designed to provide adequate containment and wear comfort even after the first absorbent body is removed. The cuff elastic elements and leg opening structures are positioned and sized to ensure proper fit and leakage prevention during reuse.

Inventive Principle:

Principle #10Preliminary action

4Reliability

If cuff structures are added for containment, then leakage prevention is improved, but the device complexity and manufacturing difficulty increase

Engineering Contradiction:

Improveleakage preventionVSAvoidmanufacturing ease

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The cuff structures are integrated into the chassis as cuff material layers that are combined with the backsheets and elastic elements. The first and second cuff structures share common components and positioning, reducing the number of separate parts and simplifying manufacturing while maintaining effective leakage prevention.

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

The design ensures effective containment and comfort throughout multiple uses, facilitating easy diaper changes and reducing material waste by allowing reuse of the second absorbent body.

Implementation Method 1

a first cuff elastic element disposed at the free edge of each first cuff; a chassis cuff elastic element disposed at the free edge of each chassis cuff

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS20250295534A1Diaper article with multiple absorbent bodies having leg cuffs

Publication Date: 2025.09.25 PROCTER & GAMBLE CO

AI summary

Disclosed is a pant type absorbent article comprising an absorbent assembly and an elastic belt.