Embossed Nonwoven Surface Layer for Low-Friction Absorbent Articles

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Solution Overview

Problem

Absorbent articles often cause skin problems due to mechanical friction, especially when in contact with bodily fluids, and existing embossing patterns can be too deep, leading to stiffness and reduced comfort.

Innovation Solution

An absorbent article with a fluid permeable surface layer featuring an embossing pattern covering 3-20% of the surface area, made from an air-through-bonded fibrous nonwoven with bicomponent fibers, providing a soft and compliant surface with enhanced visibility and resilience, and optionally combined with an intermediate layer for improved integrity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Shape

If the embossing pattern is made deep to provide distinct visual appearance, then the aesthetic effect is improved, but the surface layer becomes stiff and uncomfortable for skin contact

Engineering Contradiction:

Improveembossing pattern depthVSAvoidskin comfort

Core Design Contradiction:

ShapeVSEase of operation

Solution Approach 1:

The patent changes the depth parameter of the embossing pattern to an optimal range (0.2-0.8mm) that provides sufficient visual distinction while maintaining surface softness and skin comfort, resolving the contradiction between aesthetic effect and wearability

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses a composite nonwoven structure combining synthetic fibers with specific basis weight (14-30 g/m²) and embossing depth parameters to achieve both visual distinctness and skin friendliness simultaneously

Inventive Principle:

Principle #40Composite materials

2Shape

If the embossing pattern covers a large surface area to enhance visual effect, then the aesthetic appeal is improved, but the surface layer becomes less compliant and increases friction

Engineering Contradiction:

Improveembossing pattern coverageVSAvoidmechanical friction

Core Design Contradiction:

ShapeVSObject-affected harmful factors

Solution Approach 1:

The patent optimizes the embossing coverage area parameter to 3-20% of the total surface area, which provides sufficient visual distinction while maintaining surface compliance and reducing mechanical friction against the skin

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent applies embossing only to specific localized areas rather than the entire surface, creating a patterned appearance while preserving softness and comfort in unembossed regions, thus reducing overall friction

Inventive Principle:

Principle #3Local quality

3Ease of operation

If the surface layer is made softer to improve skin comfort, then the friction is reduced, but the embossing pattern visibility is decreased

Engineering Contradiction:

Improveskin friendlinessVSAvoidembossing pattern distinctness

Core Design Contradiction:

Ease of operationVSShape

Solution Approach 1:

The patent optimizes the basis weight parameter of the nonwoven material to 14-30 g/m², which provides the right balance between softness for skin comfort and sufficient structural integrity to maintain embossing pattern visibility

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent adjusts the embossing depth parameter within 0.2-0.8mm to ensure the pattern remains distinct and visible while the overall surface maintains softness and compliance for skin friendliness

Inventive Principle:

Principle #35Parameter changes

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 reduces mechanical friction and enhances the visibility of the embossing pattern while maintaining comfort, even under wet conditions, without the need for additional lubricants, thus improving skin friendliness and aesthetic appeal.

Implementation Method 1

an air-through-bonded fibrous nonwoven surface layer

Methodology Applied

Scientific EffectAir permeation: Permeation

Implementation Method 2

embossing may communicate or provide a function to the user of such an article. For example, it is known that embossing functions in impeding or directing fluid flow

Methodology Applied

Scientific EffectFluid flow impeding:

Implementation Method 3

absorbent article... used to absorb bodily fluids

Methodology Applied

Scientific EffectAbsorption: Absorption (physical)

Implementation Method 4

fluid permeable surface layer

Methodology Applied

Scientific EffectCapillary action: Capillary Action

Data Source

PatentUS20260033998A1Absorbent article with embossed surface layer

Publication Date: 2026.02.05 ESSITY HYGIENE & HEALTH AB

AI summary

The absorbent article as disclosed herein has longitudinal side edges extending in a longitudinal direction and transverse front and rear end edges extending in a transverse direction. The absorbent article includes a fluid permeable surface layer and a backsheet. The fluid permeable surface layer is an embossed surface layer including an embossing pattern covering from 3% to 20% of the total surface area of said surface layer. The surface layer is an air-through-bonded fibrous nonwoven surface layer comprising synthetic fibers and has a basis weight of from 14 to 30 g/m2.