Passive antimicrobial sponge

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Solution Overview

Problem

Conventional cleaning sponges are prone to microbial contamination and cross-contamination due to their inability to dry quickly, leading to prolonged bacterial growth and the spread of pathogens, and existing solutions rely heavily on chemical antimicrobial agents that can lose effectiveness and contribute to antimicrobial resistance.

Innovation Solution

A trapezoidal-shaped sponge with a tacky, soft elastomer gel base that adheres to surfaces, allowing the sponge to stand upright and dry faster, reducing microbial growth and cross-contamination risks without using chemical agents.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional sponges are used with chemical antimicrobial agents, then antimicrobial action is provided, but effectiveness is lost via washout and environmental release occurs

Engineering Contradiction:

Improveantimicrobial effectivenessVSAvoidchemical agent washout

Core Design Contradiction:

ReliabilityVSLoss of substance

Solution Approach 1:

The patent removes chemical antimicrobial agents from the sponge system entirely, extracting the harmful substance while maintaining the core antimicrobial function through a different mechanism - the physical structure that promotes rapid drying to prevent microbial growth

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The sponge's own structural design (trapezoidal shape with wide base) enables it to self-dry rapidly when placed upright, creating a self-regulating system that prevents microbial growth without requiring external chemical agents that can be washed out

Inventive Principle:

Principle #25Self-service

2Stability of the object's composition

If sponges are stowed horizontally, then they are stable, but drying time increases and microbial growth is promoted

Engineering Contradiction:

Improvestowing stabilityVSAvoiddrying time

Core Design Contradiction:

Stability of the object's compositionVSLoss of time

Solution Approach 1:

The sponge is designed with an asymmetric trapezoidal shape where the base is wider than the top, creating inherent instability when horizontal but stability when upright. This asymmetric geometry automatically guides the user to the correct vertical stowing orientation for optimal drying

Inventive Principle:

Principle #4Asymmetry

Solution Approach 2:

The invention transitions the stable stowing orientation from the traditional horizontal plane to the vertical dimension. By making the base wider than the top, the sponge achieves stability in the vertical dimension while maximizing exposure to air for drying

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Reliability

If chemical antimicrobial agents are used, then antimicrobial action is achieved, but antimicrobial resistance and environmental impact increase

Engineering Contradiction:

Improveantimicrobial actionVSAvoidantimicrobial resistance

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent converts the previously harmful reliance on chemical agents into a benefit by using a physical mechanism (rapid drying through specific geometry) that achieves the same antimicrobial outcome without the harmful side effects of chemical resistance and environmental contamination

Inventive Principle:

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

Solution Approach 2:

The invention replaces the chemical system (antimicrobial agents) with a mechanical/physical system (geometric shape that promotes air flow and rapid drying), fundamentally substituting the mechanism of action while achieving the same protective function

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 sponge design significantly reduces microbial growth by promoting faster drying and preventing cross-contamination, making it a safer, chemical-free, and more sanitary option for various environments.

Implementation Method 1

a tacky, soft elastomer gel base that adheres to surfaces

Methodology Applied

Scientific EffectAdhesion: Adhesive

Implementation Method 2

both of its major faces are directly exposed to open air... the time required for it to dry is longer than that for a sponge placed on a surface in a 'vertical' orientation

Methodology Applied

Scientific EffectEvaporation: Evaporation

Data Source

PatentUS11337576B2Passive antimicrobial sponge

Publication Date: 2022.05.24 ACCARDO THOMAS

AI summary

A sponge used as a cleaning article that employs passive means to deter the growth of microorganisms within the sponge and reduces the possibility of cross-contamination. The sponge is capable of being placed or stowed on a surface in a vertical orientation such that its outer surfaces will be maximally exposed to air, thereby increasing the rate at which moisture can evaporate from the sponge, and therefore, making it less susceptible and more inhospitable to microbial growth. To achieve a practical and reliable degree of stability, a sticky elastomeric gel is incorporated onto the sponge's bottom surface, possessing sufficient adhesive strength to securely maintain the sponge in an upright position, yet permitting the sponge to be easily removed from the surface, while at the same time providing a prophylactic barrier between the sponge and the surface, further reducing the possibility of cross-contamination.