Tampon Pledget Fiber Gradient for Leakage Balance
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Solution Overview
Problem
Conventional tampons often face a trade-off between reducing kinetic and bypass leakage, as designs that enhance expansion can lead to increased fluid transfer and leakage, while those that minimize leakage may not adequately contact vaginal walls, leading to inefficient fluid distribution.
Innovation Solution
The development of tampons with a mass of absorbent material that balances fluid distribution and expansion, featuring a Fiber Kinetic Value (FKV) of less than 35 and an average dynamic expansion of greater than 18.7 mm, utilizing fiber-integrated nonwoven materials to optimize fluid absorption and expansion properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluid is rapidly transported along the pledget to the withdrawal end to enhance expansion, then the likelihood of bypass leakage is reduced, but the likelihood of kinetic leakage increases
Solution Approach 1:
The pledget is designed with varying fiber composition and structure at different locations. The withdrawal end contains hydrophilic fibers that attract and hold fluid, creating localized fluid retention zones. This gradient in material properties allows fluid to be transported to the withdrawal end for expansion while preventing excessive fluid movement that causes kinetic leakage.
Solution Approach 2:
The pledget combines hydrophilic fibers (rayon, cotton) with hydrophobic fibers (polyester, polypropylene) in specific ratios and distributions. This composite structure creates a balance between fluid transport and fluid retention, enabling the pledget to expand reliably without generating harmful kinetic leakage.
2Object-generated harmful factors
If fluid is transported slowly along the pledget to reduce kinetic leakage, then the likelihood of kinetic leakage is reduced, but the likelihood of bypass leakage increases
Solution Approach 1:
Different regions of the pledget have specialized functions: the insertion end allows fluid entry, the middle section transports fluid through capillary action, and the withdrawal end retains fluid for expansion. This spatial differentiation of properties ensures adequate fluid transport without excessive velocity that would cause kinetic leakage.
Solution Approach 2:
The pledget's fiber distribution, porosity, and capillary dimensions are varied along its length to control fluid transport parameters. This gradient in physical parameters enables optimized fluid flow velocity that prevents both bypass and kinetic leakage.
3Ease of operation
If the pledget is compressed to a small size for simple insertion, then ease of insertion is improved, but the ability to expand and contact vaginal walls is reduced
Solution Approach 1:
The pledget transitions from a compressed static state for insertion to an expanded dynamic state after fluid absorption. The material structure is designed to be compressible for insertion while maintaining the ability to expand dynamically upon fluid contact, achieving both ease of insertion and reliable vaginal wall contact.
Solution Approach 2:
The pledget undergoes parameter changes from a compressed state with small dimensions to an expanded state with larger dimensions after fluid absorption. This controlled parameter change enables easy insertion followed by effective expansion to contact vaginal walls and prevent bypass leakage.
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
These tampons effectively reduce both kinetic and bypass leakage by achieving a balance in fluid distribution and expansion, ensuring better absorption and expansion capabilities without excessive fluid transfer, thereby enhancing menstrual protection.
Implementation Method 1
fluid absorbed by the pledget must be transferred to the withdrawal end of the pledget
Implementation Method 2
mass of absorbent material
Implementation Method 3
the absorbent pledget must then expand in order to reduce the likelihood of leakage
Data Source
AI summary
An absorbent tampon is disclosed herein. The absorbent tampon strikes a balance between fluid distribution and expansion to reduce the likelihood of kinetic leakage and bypass leakage. The tampons have a fluid kinetic value “FKV” and a dynamic expansion value which are associated with their respective Syngyna ratings.