Layered Absorbent Article Elastics for Fit and Skin Comfort

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Solution Overview

Problem

Disposable wearable absorbent articles with multiple elastic structures, such as shaping and anchoring elastics, often fail to work together effectively, leading to discomfort, poor performance, and unattractive appearance due to excessive force concentration on the wearer's skin.

Innovation Solution

The elastic structures are separated into multiple layers, allowing shaping elastics to provide a conforming fit and distribute contact forces independently from anchoring elastics, which hold the article in place, by using nonwoven webs and elastomeric films with thermoplastic elastomers like styrenic block copolymers and polyolefins.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If anchoring elastics are used to hold the article in place, then the article stability is improved, but the shaping elastics cannot function independently to provide conforming fit

Engineering Contradiction:

Improvearticle stabilityVSAvoidindependent elastic function

Core Design Contradiction:

Stability of the object's compositionVSAdaptability or versatility

Solution Approach 1:

The elastic structures are divided into multiple layers: anchoring elastics are placed in an outer belt portion while shaping elastics are placed in an inner belt portion. This segmentation allows each elastic type to function independently without interfering with the other, resolving the contradiction between stability and adaptability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent introduces a vertical dimension by stacking elastic structures in multiple layers (outer and inner belt portions) rather than placing them in the same plane. This dimensional separation enables independent functionality of anchoring and shaping elastics while maintaining overall article stability.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Stability of the object's composition

If anchoring elastics transfer loads to the wearer's body, then the article is held in place, but excessive forces are concentrated against the wearer's skin causing discomfort

Engineering Contradiction:

Improvearticle positioningVSAvoidskin discomfort

Core Design Contradiction:

Stability of the object's compositionVSObject-affected harmful factors

Solution Approach 1:

The load transfer function is segmented from the shaping function. Anchoring elastics in the outer belt portion handle load transfer to the wearer's body, while shaping elastics in the inner belt portion handle conforming fit. This segmentation prevents excessive force concentration on the skin by distributing forces through separate functional layers.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The inner belt portion with shaping elacts acts as an intermediary layer between the outer anchoring elastics and the wearer's skin. This intermediary distributes and softens the forces before they reach the skin, reducing discomfort while maintaining positioning stability.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Shape

If shaping elastics are used to provide conforming fit, then the article appearance is improved, but the anchoring elastics cannot effectively transfer loads to intended parts of the wearer's body

Engineering Contradiction:

Improveconforming fitVSAvoidload transfer effectiveness

Core Design Contradiction:

ShapeVSStability of the object's composition

Solution Approach 1:

The patent segments the elastic structures into distinct layers: shaping elastics in the inner belt portion provide conforming fit and attractive appearance, while anchoring elastics in the outer belt portion effectively transfer loads to the wearer's body. This segmentation eliminates the interference that would occur if both functions were combined in a single layer.

Inventive Principle:

Principle #1Segmentation

4Device complexity

If multiple elastic structures are combined in a single layer, then the device complexity is reduced, but the elastic structures do not work together effectively

Engineering Contradiction:

Improveelastic structure configurationVSAvoidelastic function performance

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

Instead of combining multiple elastic structures in a single plane (which would be simpler but ineffective), the patent arranges them in multiple vertical layers (outer and inner belt portions). This dimensional organization maintains functional independence and effectiveness while managing the complexity through structured layering.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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 solution results in absorbent articles that are comfortable, attractive, and perform well by allowing elastic structures to function independently, providing a better fit and stability without skin discomfort.

Implementation Method 1

elastomeric films with thermoplastic elastomers like styrenic block copolymers and polyolefins

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentEP4360604B1Absorbent articles with elastics in multiple layers

Publication Date: 2025.10.22 PROCTER & GAMBLE CO

Figure 1A
Figure 1B~1C
Figure 1D

AI summary

Absorbent articles that include elastics in multiple layers are disclosed herein.