Antimicrobial Face Covering With Nanoparticle Outer Layer
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Solution Overview
Problem
Current antimicrobial and antiviral products for surfaces and textiles in clinical and public settings are inadequate in preventing the spread of pathogens, particularly in medical facilities and high-touch areas, as they do not effectively inhibit or prevent pathogen growth on fomite materials.
Innovation Solution
The development of articles with a substrate layer incorporating metal particles, specifically sized between 1 to 200 nanometers, integrated into cellulosic fibers and polymers, which are configured to inhibit or prevent pathogen growth, including face coverings, medical articles, wound dressings, packaging, and adhesive articles, utilizing a continuous process for nanoparticle synthesis that enhances production efficiency and retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current antimicrobial paper-based filters impregnated with copper particles or silver particles are used, then some antimicrobial and antiviral efficacy is achieved, but the pathogen growth inhibition is insufficient for enhanced protection in medical facilities and high-touch areas
Solution Approach 1:
The patent applies composite materials by combining cellulosic fibers with thermoplastic fibers to create a blended substrate structure. This composite approach enhances the mechanical strength and durability of the substrate while maintaining its antimicrobial and antiviral properties, thereby improving pathogen growth inhibition efficacy without excessive complexity
Solution Approach 2:
The patent applies local quality by incorporating metal particles specifically into the outer protection layer that contacts external environments, while the inner layer adjacent to skin uses a different fiber composition. This localized enhancement of antimicrobial properties where most needed improves overall efficacy while optimizing resource distribution
2Reliability
If metal particles are incorporated into substrates to inhibit pathogen growth, then antiviral and antimicrobial efficacy is enhanced, but manufacturing complexity and production challenges increase
Solution Approach 1:
The patent applies preliminary action by incorporating metal particles during the substrate formation process itself, rather than as a separate post-treatment step. This integration into the manufacturing process ensures uniform distribution of antimicrobial agents while simplifying production workflow and reducing additional manufacturing complexity
Solution Approach 2:
The patent merges the substrate formation process with metal particle incorporation, combining what could be separate steps into a unified manufacturing process. This integration enhances antimicrobial efficacy while maintaining ease of manufacture by avoiding additional complex processing steps
3Reliability
If multi-layer structures with bonded outer regions are used, then pathogen transmission prevention is improved, but device complexity and production time increase
Solution Approach 1:
The patent applies segmentation by dividing the substrate into distinct functional layers: an inner layer for comfort, a middle layer for filtration, and an outer protection layer for enhanced pathogen inhibition. This segmentation allows each layer to be optimized for its specific function while maintaining overall production efficiency through standardized manufacturing processes
Solution Approach 2:
The patent applies universality by designing a multi-layer structure where each layer serves multiple functions: the outer protection layer provides both mechanical protection and enhanced antimicrobial activity, the middle layer provides filtration and structural support, and the inner layer provides comfort and moisture management. This multi-functionality reduces the need for additional specialized components, maintaining productivity
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
These articles demonstrate significant antiviral and antimicrobial efficacy, achieving log reduction values of at least 4.0, average filtration efficiencies of 99.71%, and bacterial filtration efficiencies of 99.37%, effectively preventing pathogen transmission and colonization on surfaces.
Implementation Method 1
The metal particles being configured to inhibit or prevent pathogen growth
Implementation Method 2
At least portion of the outer region of the inner layer and the outer region of the outer protection layer are bonded together
Data Source
AI summary
An embodiment is an article configured to inhibit or prevent pathogen growth. The article includes an inner layer configured to face a wearer's skin when the face covering article is applied to the face of the wearer; a middle layer adjacent to the inner layer; and an outer protection layer adjacent to the middle layer and opposite the inner layer and comprising a substrate and metal particles in the substrate, wherein the metal particles are configured to inhibit or prevent pathogen growth.