Polypropylene Mask Coating for Pathogen Binding

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Solution Overview

Problem

Conventional facial masks produced in limited sizes fail to fit a substantial portion of the human population tightly, leading to incomplete prevention of airborne infectious particle transmission, and often cause discomfort, especially for children, while also allowing substantial ingress of infectious particles between the mask and the wearer's face.

Innovation Solution

A polypropylene-based facial mask coated with a composition comprising citric acid, polyvinyl alcohol, and nonionic surfactants, potentially combined with bactericidal, fungicidal, or viricidal agents like copper acetate and zinc acetate, featuring multiple layers and a design that enhances fit around the nose, including a flap that inverts to bind infectious particles.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If conventional facial masks are produced in limited sizes, then manufacturing costs are reduced, but fit quality and pathogen prevention effectiveness deteriorate

Engineering Contradiction:

Improvemanufacturing costVSAvoidpathogen prevention effectiveness

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent applies parameter changes by treating the polypropylene mask material with a chemical composition (citric acid, polyvinyl alcohol, and nonionic surfactant) that alters its surface properties. This treatment increases the material's affinity for binding infectious particles, transforming the mask from a purely mechanical barrier into an active pathogen-capturing device that works effectively regardless of fit imperfections.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces reliance on mechanical fit (seals, elastic bands, precise sizing) with a chemical mechanism. The treated polypropylene material uses chemical interactions to bind and inactivate pathogens, substituting the mechanical interception system with a chemical inactivation system that is less sensitive to fit variations.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If elastic bands are added to seal the mask against the face, then fit quality improves, but wearer comfort deteriorates

Engineering Contradiction:

Improveseal qualityVSAvoidwearer comfort

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent substitutes the mechanical sealing system (elastic bands creating pressure seals) with a chemical system. The treated polypropylene material binds pathogens through chemical interactions, eliminating the need for tight mechanical seals and the associated discomfort from pressure and deformation.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent converts the limitation of polypropylene's hydrophobicity (which repels moisture and prevents binding) into a benefit by applying a chemical treatment that selectively modifies the surface. The treatment allows the material to maintain its bulk hydrophobicity for comfort while creating a surface layer that actively binds and inactivates pathogens.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Ease of operation

If mask material hydrophobicity is increased to maintain comfort, then wearer comfort improves, but pathogen binding capability deteriorates

Engineering Contradiction:

Improvewearer comfortVSAvoidpathogen binding capability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent applies local quality by creating a dual-nature material structure. The bulk polypropylene maintains hydrophobicity for comfort and breathability, while the surface layer (treated with citric acid, polyvinyl alcohol, and surfactant) acquires hydrophilic and pathogen-binding properties. This local differentiation allows simultaneous achievement of comfort and pathogen binding.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent creates a composite material system combining polypropylene base material with a chemical treatment layer. The composite structure integrates the hydrophobic bulk material (for comfort) with a hydrophilic surface treatment (for pathogen binding), achieving properties that neither material possesses alone.

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 solution provides improved fit and reduced transmission of human pathogens by binding infectious particles, enhancing comfort and effectiveness in preventing both ingress and egress of airborne pathogens, while maintaining airflow and being suitable for large-scale manufacturing.

Implementation Method 1

The composition for coating a polypropylene-based fabric or polypropylene-based material... comprises an aqueous solution of citric acid, polyvinyl alcohol and one or more than one nonionic surfactant

Methodology Applied

Scientific EffectAdsorption: Adsorption

Implementation Method 2

The composition comprises an aqueous solution of citric acid, polyvinyl alcohol and one or more than one nonionic surfactant

Methodology Applied

Scientific EffectSurfactant action: Surfactant

Data Source

PatentUS9963611B2Composition for use in decreasing the transmission of human pathogens

Publication Date: 2018.05.08 INNONIX TECH

AI summary

A composition for coating a polypropylene-based fabric or polypropylene-based material for use in decreasing the transmission of human pathogens. A device such as a protective face mask made from a polypropylene-based fabric or polypropylene-based material coated with the composition.