Masking Layer with See-Through Areas for Diaper Channel Visibility

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Solution Overview

Problem

Existing absorbent articles lack a simple and cost-effective way to visually highlight the presence of channels or fluid-handling structures on the wearer-facing side, which can enhance fluid distribution and retention efficiency.

Innovation Solution

Incorporating a masking layer with see-through areas and a contrasting layer that provides a visible signal through these areas, utilizing a masking layer made of unbonded or loosely bonded fibers and a contrasting layer with a distinct color or texture, ensuring a color difference of at least 2.0 on the CIE L*a*b* scale.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If a masking layer with see-through areas and contrasting layer is added to highlight channels, then visual signal effectiveness is improved, but device complexity increases

Engineering Contradiction:

Improvevisual signal effectivenessVSAvoiddevice complexity

Core Design Contradiction:

Loss of informationVSDevice complexity

Solution Approach 1:

The patent applies color changes by incorporating a contrasting layer with distinct color (e.g., blue, green, or yellow) that differs from the masking layer color (e.g., white or light gray). This color contrast creates visible signals through see-through areas, allowing channels to be highlighted without requiring complex electronic or mechanical systems.

Inventive Principle:

Principle #32Color changes

Solution Approach 2:

The masking layer serves as an intermediary element between the absorbent core and the outer surface. It contains see-through areas that selectively reveal the contrasting layer underneath, acting as a mediator that controls visual information display while maintaining the absorbent article's functional integrity.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Loss of substance

If unbonded or loosely bonded fibers are used in the masking layer, then material usage is reduced, but manufacturing precision decreases

Engineering Contradiction:

Improvematerial usageVSAvoidmanufacturing precision

Core Design Contradiction:

Loss of substanceVSManufacturing precision

Solution Approach 1:

The masking layer is constructed from unbonded or loosely bonded fibers creating a porous structure. This allows the layer to be formed by simple deposition processes without requiring complex bonding mechanisms, reducing material usage while maintaining sufficient structural integrity for visual signaling functionality.

Inventive Principle:

Principle #31Porous materials

Data Source

PatentEP3613395B1Absorbent articles having a contrasting layer and a masking layer

Publication Date: 2025.04.02 PROCTER & GAMBLE CO

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AI summary

Absorbent articles (20) for personal hygiene such as diapers comprising a contrasting layer (16) and a masking layer (54) between the topsheet and the contrasting layer. The masking layer comprises at least one see-through area (86) so that the contrasting layer is at least partially visible on the wearer-facing side of the article through the see-through area. In one execution, the masking layer may be between the topsheet and the absorbent layer and the contrasting layer disposed between the masking layer and the absorbent layer.