Antimicrobial Pouch with Dual-Layer Porous Structure for Stable Chlorine Dioxide Release

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Solution Overview

Problem

Existing antimicrobial pouches fail to provide a stable and continuous release of chlorine dioxide under conditions of vibration or shock, posing safety concerns and reducing the persistence of antimicrobial effects when adapted for portable use.

Innovation Solution

An antimicrobial pouch design featuring a first pouch body with fine holes smaller than the inorganic solid carrier particles and a second pouch body with a release hole, allowing controlled release of the antimicrobial substance through air flow, even under vibration or shock, and incorporating a volume ratio and release hole configuration for stable and efficient antimicrobial substance delivery.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the sterilizing antimicrobial agent is adapted for portable use, then the product becomes suitable for carrying and wearing, but the stability and persistence of chlorine dioxide release is compromised under vibration or shock

Engineering Contradiction:

Improveportable use suitabilityVSAvoidstability of chlorine dioxide release

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The pouch is divided into an inner pouch body containing the antimicrobial agent and an outer pouch body providing structural protection. This segmentation allows the inner pouch to be lightweight and flexible for portability while the outer pouch provides rigidity to maintain stability during vibration and shock.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The pouch structure incorporates protective design elements that cushion against vibration and shock before they can affect the antimicrobial agent. The outer pouch body and overall structural design provide preemptive protection to maintain stable chlorine dioxide release conditions during portable use.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

2Duration of action of stationary object

If the product is designed for continuous release, then the persistence of antimicrobial effect is improved, but the risk of sudden high-concentration release or leakage increases under shock

Engineering Contradiction:

Improvepersistence of antimicrobial effectVSAvoidsudden high-concentration release risk

Core Design Contradiction:

Duration of action of stationary objectVSObject-affected harmful factors

Solution Approach 1:

The pouch incorporates porous polyolefin resin that allows controlled diffusion of chlorine dioxide gas. The porous structure enables continuous release through multiple small pathways rather than a single opening, which prevents sudden high-concentration release while maintaining persistent antimicrobial effect. The pore size and distribution control the release rate.

Inventive Principle:

Principle #31Porous materials

Solution Approach 2:

The pouch uses flexible polyolefin resin film that can deform under shock without breaking. This flexibility allows the pouch to absorb impact energy while maintaining its integrity and the controlled release function, preventing sudden release or leakage during vibration and shock conditions.

Inventive Principle:

Principle #30Flexible shells and thin films

3Reliability

If the pouch structure is made complex to ensure stability under vibration, then the reliability is improved, but the device complexity increases

Engineering Contradiction:

Improvestability under vibration or shockVSAvoidpouch structure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The pouch employs composite construction using polyolefin resin that combines flexibility and structural strength. This single material solution provides both the needed durability for vibration resistance and the flexibility for portable use, avoiding the need for complex multi-material assemblies while maintaining reliability.

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 antimicrobial pouch ensures stable and continuous release of chlorine dioxide, maintaining antimicrobial effectiveness over a long term and preventing sudden releases, making it suitable for portable use and safe to carry.

Implementation Method 1

a sterilizing antimicrobial agent produced by an adsorptive retention of chlorine dioxide gas in a porous inorganic carrier

Methodology Applied

Scientific EffectAdsorption: Adsorption

Implementation Method 2

the first pouch body includes fine holes on an entire surface, the fine holes having a diameter smaller than a particle size of the inorganic solid carrier

Methodology Applied

Scientific EffectPhysical barrier filtration: Filter (physical)

Implementation Method 3

chlorine dioxide is slowly dispersed in air through an opening portion by opening a top lid of the container

Methodology Applied

Scientific EffectConvection: Convection

Data Source

PatentUS9078434B2Antimicrobial pouch

Publication Date: 2015.07.14 WAK

AI summary

Provided is a solid antimicrobial agent suitable for portable use, which can continuously release a stable amount of chlorine dioxide even under vibration or shock. An antimicrobial pouch includes: an antimicrobial agent supporting an antimicrobial substance in a porous inorganic solid carrier; a first pouch body receiving the antimicrobial agent; and a second pouch body receiving the first pouch body, wherein the first pouch body includes fine holes on an entire surface, the fine holes having a diameter smaller than a particle size of the inorganic solid carrier, and the second pouch body includes release holes at an edge portion, the release holes through which the antimicrobial substance is released to atmosphere of the second pouch body.