Antimicrobial Polymeric Straw Design to Reduce Surface Contamination
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Solution Overview
Problem
Conventional fluid conveying conduits, such as drinking straws and medical tubing, are prone to contamination with microorganisms due to their external surfaces being exposed and handled, leading to potential infections and cross-contamination.
Innovation Solution
A polymeric tubular conduit design featuring an outer tubular layer with an antimicrobial agent that inhibits the growth or kills microorganisms on its surface, either externally or internally, to prevent contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional fluid conveying conduits are used with exposed external surfaces, then ease of operation and handling is improved, but microbial contamination and infection risk increase
Solution Approach 1:
The patent incorporates antimicrobial agents directly into the conduit material, converting the inherent risk of microbial contamination into a beneficial protective function. The antimicrobial agents are integrated during manufacturing to provide continuous protection without affecting handling properties
Solution Approach 2:
The patent modifies the chemical composition parameters of the conduit by incorporating antimicrobial agents at specific concentrations (e.g., 0.1-10% by weight). This changes the surface properties to be antimicrobial while maintaining the mechanical and handling properties of the original material
2Object-affected harmful factors
If antimicrobial agents are incorporated into the conduit material, then microbial contamination is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent merges the antimicrobial function with the structural conduit material by incorporating antimicrobial agents during the extrusion or molding process. This combination eliminates the need for separate coating or treatment steps, simplifying the overall manufacturing process despite the added functional requirement
3Reliability
If antimicrobial agents are added to the polymeric material, then antimicrobial effectiveness is improved, but material cost increases
Solution Approach 1:
The patent optimizes the concentration parameter of antimicrobial agents to achieve effective protection at minimal doses. By carefully controlling the amount and type of antimicrobial agent (e.g., silver ions, zinc oxide), the patent achieves 99.9%+ microbial reduction while minimizing material cost through efficient dosage
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 agent effectively reduces microbial contamination by 99.999% on the conduit surfaces, providing a safer and cleaner interface for use.
Implementation Method 1
the outer tubular layer includes an amount of antimicrobial agent. The amount of antimicrobial agent can be sufficient to kill or inhibit growth of microorganisms in contact with a polymeric tubular conduit wall external surface
Data Source
AI summary
A polymeric tubular conduit including a polymeric tubular conduit wall having an outer tubular layer coaxially overlaying an inner tubular layer which defines a continuous tubular passage along a polymeric tubular conduit length of the polymeric tubular conduit; whereby the outer tubular layer, the inner tubular layer, or combinations thereof, include an amount of antimicrobial agent. The amount of antimicrobial agent can be sufficient to kill or inhibit growth of microorganisms in contact with a corresponding polymeric tubular conduit wall external surface, polymeric tubular conduit wall internal surface, or combinations thereof, of the polymeric tubular conduit wall.