Sterilization Wrap With Wet-Laid Non-Woven Inner Layer
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Solution Overview
Problem
Conventional sterilization wraps, particularly those used in simultaneous wrapping, face challenges with moisture dissipation during steam sterilization, leading to wet packs and the need for additional trayliners, which can cause inefficiencies and errors in the sterilization process.
Innovation Solution
A sterilization wrap system comprising an absorbent wet-laid non-woven inner layer and a thermoplastic outer layer, bonded by ultrasonic welding, which enhances moisture absorption and wicking properties, allowing for faster drying times and eliminating the need for trayliners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional sterilization wraps are used, then the sterilization process can be performed, but moisture dissipation is poor leading to wet packs and requiring additional trayliners
Solution Approach 1:
The sterilization wrap combines an outer thermoplastic layer with an inner wet-laid non-woven layer that has superior moisture wicking properties. This composite structure allows the wrap to maintain barrier integrity while actively transporting moisture away from the sterilized contents, eliminating wet packs without requiring additional trayliners.
Solution Approach 2:
The wet-laid non-woven inner layer utilizes a porous fibrous structure that enables rapid moisture absorption and wicking. The interconnected pores allow steam and condensation to be drawn through the material via capillary action, significantly improving moisture dissipation compared to conventional solid or less porous materials.
2Reliability
If additional trayliners are used to prevent wet packs, then moisture management improves, but device complexity and potential for errors increase
Solution Approach 1:
The moisture management function previously requiring a separate trayliner component is merged into the sterilization wrap itself. The inner wet-laid layer performs the moisture wicking function that would otherwise require an additional absorbent layer or trayliner, simplifying the overall system to a single integrated wrap.
Solution Approach 2:
The sterilization wrap is designed to perform multiple functions simultaneously: providing the sterile barrier function of the outer thermoplastic layer while the inner wet-laid layer provides active moisture management. This multi-functional design eliminates the need for separate specialized components like trayliners.
3Duration of action of stationary object
If conventional sterilization wraps are used, then the process can be completed, but drying time is extended increasing turnaround time
Solution Approach 1:
The porous structure of the wet-laid non-woven inner layer provides numerous capillary channels that rapidly draw moisture away from the sterilized contents. This high surface area and interconnected pore network accelerates evaporation and drying, significantly reducing the post-sterilization drying time compared to conventional wraps.
Solution Approach 2:
The passive drying process is replaced with active moisture transport through the hydrophilic wet-laid layer. Instead of relying on slow evaporation from the wrap surface, the capillary action within the porous material actively pulls moisture through and away from the contents, dramatically accelerating the drying process.
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 system improves commercial robustness, reduces wet-pack formation, and decreases sterilization costs and turnaround times by ensuring faster drying and maintaining necessary strength and barrier properties.
Implementation Method 1
an inner layer comprising a wet-laid non-woven material
Implementation Method 2
enhances moisture absorption and wicking properties
Implementation Method 3
bonded by ultrasonic welding
Data Source
Figure 1~2
Figure 3~4
AI summary
Disclosed herein are advantageous sterilization wraps, and related methods of fabrication and use thereof. More particularly, the present disclosure provides advantageous sterilization wraps having an outer layer comprising a thermoplastic material and an inner layer comprising a wet-laid non-woven material, with the outer layer secured and bonded to the inner layer by at least a first weld area. The present disclosure also provides for a method for fabricating a sterilization wrap including providing an outer layer comprising a thermoplastic material, and providing an inner layer comprising a wet-laid non-woven material, and securing and bonding the outer layer to the inner layer by at least a first weld area.