Reinforced Fiber Web Structure for Antimicrobial Moisture Management

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Solution Overview

Problem

Existing wound care products face challenges with cationic antiseptics being sequestered or deactivated by anionic materials, limiting their effectiveness, and there is a need for materials that facilitate wound healing while maintaining a moist environment.

Innovation Solution

A reinforced fiber web structure with a reinforcing mesh and water-sensitive fibers, combined with an antimicrobial layer, providing structural integrity and effective antimicrobial activity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If anionic materials such as alginate and carboxymethyl cellulose are used in wound care products to create a moist environment, then the ability to absorb and hold moisture is improved, but cationic antiseptics are sequestered and deactivated

Engineering Contradiction:

Improvemoisture absorption capacityVSAvoidantiseptic effectiveness

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The wound care product is divided into distinct functional layers: a first wound contact layer containing cationic antiseptics, a reinforcing layer providing structural integrity, and a second wound contact layer with hydrophilic fibers for moisture management. This segmentation prevents the anionic materials from直接接触 and deactivating the cationic antiseptics while maintaining both functions in the same product.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The reinforcing layer acts as an intermediary barrier between the cationic antiseptics in the first wound contact layer and the anionic hydrophilic materials in the second wound contact layer. This intermediate layer prevents direct interaction that would cause sequestration and deactivation, allowing both components to function effectively.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Quantity of substance

If rayon is used as a highly hydrophilic material in wound care products to maintain moisture, then moisture retention is improved, but cationic antimicrobial molecules are bound and rendered ineffective

Engineering Contradiction:

Improvemoisture retentionVSAvoidantimicrobial activity

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The product structure segments the antimicrobial function and moisture retention function into separate layers. The first wound contact layer contains cationic antiseptics without anionic materials, while the second wound contact layer contains hydrophilic rayon fibers for moisture retention, eliminating the harmful interaction.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The reinforcing layer serves as an intermediary barrier that prevents direct contact between the cationic antimicrobial molecules in the first wound contact layer and the anionic rayon fibers in the second wound contact layer, preventing binding and maintaining antimicrobial effectiveness.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Strength

If a reinforcing mesh is added to maintain structural integrity of the absorbent member, then mechanical strength is improved, but the complexity of the product structure increases

Engineering Contradiction:

Improvestructural integrityVSAvoidproduct structure complexity

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The reinforcing mesh is strategically placed only in the core structure between the two wound contact layers, providing local reinforcement where mechanical strength is most needed while keeping the wound contact surfaces simple and compliant for optimal wound interaction.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The product employs a composite structure combining a reinforcing mesh material with soft absorbent wound care layers. This composite approach integrates the rigid mesh for structural integrity with the flexible wound contact layers, achieving both strength and wound care functionality.

Inventive Principle:

Principle #40Composite materials

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 structure maintains a moist wound environment, enhances wound healing, and effectively prevents a wide range of microbial infections.

Implementation Method 1

water-sensitive fibers, wherein the water-sensitive fibers comprise a first copolymer comprising divalent hydroxyethylene monomer units and divalent dihydroxybutylene monomer units

Methodology Applied

Scientific EffectCapillary action: Capillary Action

Implementation Method 2

the first and second fiber webs are physically entangled with each other and the reinforcing mesh

Methodology Applied

Scientific EffectMechanical interlocking: Mechanical Fastener

Data Source

PatentEP4284314B1Reinforced fiber web and wound dressing material containing it

Publication Date: 2025.08.06 SOLVENTUM INTELLECTUAL PROPERTIES CO

Figure 1~4

AI summary

A reinforced fiber web has first and second opposed major sides and comprises first and second fiber webs having a reinforcing mesh disposed therebetween. The first and second fiber webs are physically entangled with each other and the reinforcing mesh. A wound dressing material comprises the reinforced fiber web, a first wound-contact scrim, and a first antimicrobial layer sandwiched therebetween. The first wound-contact scrim comprises water-sensitive fibers comprising a copolymer comprising divalent hydroxyethylene monomer units and divalent dihydroxybutylene monomer units.