Reusable Swim Nappy Moisture Management via Layered Fabric
Solution Overview
Problem
Existing reusable and disposable diapers are unsuitable for infants and young children to wear during water activities due to bulkiness, water absorption, and safety hazards, and they often cause discomfort and skin irritation when wet.
Innovation Solution
A reusable swim diaper designed as briefs with an elastic closure, featuring an outer layer of elastic knitted or woven fabric, a water-absorbing intermediate layer, and a water vapor-permeable inner layer made of synthetic fibers, with seamless construction to minimize moisture contact with the skin and ensure breathability and waterproofness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional disposable diapers or reusable cloth diapers are used for swimming, then they provide absorbency and comfort on land, but they become too bulky and absorb too much water during water activities, creating safety hazards and discomfort
Solution Approach 1:
The patent changes the material parameters of the diaper by using a multi-layer construction with specific fabric combinations (waterproof outer layer, breathable membrane, moisture-wicking inner layer) that fundamentally alter how the diaper interacts with water compared to traditional single-material diapers
Solution Approach 2:
The patent employs composite materials by combining multiple fabric layers with different properties (waterproof, breathable, absorbent) into a single diaper structure, allowing it to repel external water while managing internal moisture effectively
2Object-affected harmful factors
If waterproof materials are used to prevent water penetration, then water resistance is improved, but breathability and moisture vapor transmission are reduced, causing discomfort
Solution Approach 1:
The patent uses a waterproof membrane or coating layer that acts as a flexible barrier, allowing the outer layer to be impermeable to liquid water while maintaining flexibility and comfort for the wearer
Solution Approach 2:
The patent employs breathable waterproof membranes with microporous structures that are hydrophobic to liquid water but hydrophilic to water vapor, allowing moisture vapor to escape while blocking liquid water penetration
3Ease of operation
If absorbent materials like cotton are used to wick moisture away from the body, then moisture management is improved, but the materials store moisture and do not release it, maintaining wetness against the skin
Solution Approach 1:
The patent extracts the moisture storage function from the moisture-wicking layer by introducing a separate absorbent insert that can be removed or is contained within the diaper structure, preventing moisture accumulation against the skin
Solution Approach 2:
The patent incorporates a disposable absorbent insert within the reusable diaper shell, allowing the absorbent component to be discarded after use, eliminating the problem of moisture retention in reusable fabrics
4Ease of operation
If microporous membranes are used for breathability, then water vapor permeability is improved, but body oils and sweat clog the pores, reducing functionality over time
Solution Approach 1:
The patent introduces a protective intermediary layer or treatment on the microporous membrane that prevents body oils and sweat from clogging the pores, maintaining breathability functionality over extended use
Solution Approach 2:
The patent modifies the surface parameters of the microporous membrane through coatings or treatments that change its interaction with body oils and sweat, making it resistant to clogging while maintaining vapor permeability
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 swim diaper provides comfort and keeps the skin and environment dry, reducing the risk of skin irritation and enhancing safety during water activities by effectively managing moisture and maintaining breathability while preventing water penetration.
Implementation Method 1
materials must be used that are breathable on the one hand and have water vapor permeability on the other
Implementation Method 2
a water-absorbing intermediate layer, wherein the water-absorbing intermediate layer is made of a textile fabric
Data Source
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AI summary
The invention describes a reusable swim diaper (10) in the form of briefs, with an elasticated waistband (12) and/or leg opening, comprising: a) an outer layer (14), wherein the outer layer is made of an elastic knitted fabric or a woven fabric; b) a water-absorbing intermediate layer (18), wherein the water-absorbing intermediate layer is made of a textile fabric; c) a water vapor permeable inner layer (16), wherein the water vapor permeable inner layer is made of a knitted fabric of synthetic fiber materials; d) and wherein the water-absorbing intermediate layer (18) is applied essentially without a seam between the outer and inner layers.