Multilayer Absorbent Article with Waterproof Fluid Containment
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Solution Overview
Problem
Traditional absorbent materials fail to provide a comprehensive barrier against fluid penetration, leading to saturation and seepage, limiting their use in infant care, medical settings, and homecare for adults with special needs.
Innovation Solution
A multilayer structure comprising an outer fabric layer, an absorbent inner layer, and a waterproof inner membrane layer, designed to trap fluids in the absorbent layer while preventing them from passing through to the outer side, using materials like polyester, terrycloth, and thermoplastic polyurethane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional absorbent materials (cotton or polyester layers) are used, then fluid absorption capability is improved, but fluid penetration barrier is worsened
Solution Approach 1:
The protective article is divided into distinct functional layers: an outer fabric layer, an absorbent inner layer, and a waterproof inner membrane layer. This segmentation allows each layer to perform its specific function optimally - the outer layer provides durability and comfort, the inner layer absorbs fluid, and the membrane layer prevents penetration, thereby resolving the contradiction between absorption capacity and penetration barrier.
Solution Approach 2:
The invention uses a composite structure combining different materials with complementary properties: cotton or polyester for the outer layer (durability and comfort), terrycloth or fleece for the absorbent layer (fluid absorption), and thermoplastic polyurethane or polyurethane laminate for the waterproof membrane (penetration barrier). This composite approach enables simultaneous achievement of high absorption capacity and reliable fluid prevention.
2Ease of manufacture
If single or multiple layers of cotton or polyester are used, then ease of manufacture is improved, but fluid protection reliability is worsened
Solution Approach 1:
The three-layer structure segments the manufacturing process into distinct steps for producing each layer, which can then be assembled together. This segmentation maintains ease of manufacture for each individual layer while achieving superior fluid protection through the combined structure, resolving the contradiction between manufacturing simplicity and protection reliability.
Solution Approach 2:
The waterproof inner membrane layer is constructed as a thin film or laminate (thermoplastic polyurethane or polyurethane laminate) that provides effective fluid protection while remaining flexible and integrable with the other layers. This thin film approach maintains ease of manufacture compared to rigid barriers while significantly improving fluid protection reliability.
3Quantity of substance
If traditional absorbent materials are used, then cost is improved, but duration of protection is worsened
Solution Approach 1:
The segmented three-layer structure extends protection duration by ensuring that the waterproof membrane layer continuously prevents fluid penetration regardless of the absorbent layer's saturation status. This segmentation allows the system to maintain protection integrity over extended periods, resolving the contradiction between material cost and protection duration.
Solution Approach 2:
The composite structure combines cost-effective materials (cotton, polyester, terrycloth) with a relatively inexpensive waterproof membrane (thermoplastic polyurethane or polyurethane laminate) to achieve extended protection duration. The synergistic combination allows the system to maintain protective functionality longer than traditional single-material constructions, improving duration without proportionally increasing cost.
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 multilayer design effectively manages fluids, maintaining the dryness and integrity of underlying surfaces, enhancing comfort and hygiene, and extending the usability of protective garments and bedding.
Implementation Method 1
at least one absorbent inner layer disposed underneath the outer fabric layer
Implementation Method 2
effective fluid management by trapping fluids in the absorbent layer
Implementation Method 3
at least one waterproof inner membrane layer disposed underneath the absorbent inner layer... preventing them from passing through to the other side via the waterproof layer
Data Source
AI summary
The invention pertains to a layered article designed for fluid protection, comprising a configuration that includes at least one outer fabric layer, at least one absorbent inner layer situated beneath the outer fabric layer, and at least one waterproof inner membrane layer positioned beneath the absorbent inner layer. This structure provides effective isolation of fluids, ensuring that moisture absorbed by the inner layer does not permeate through to the outer surface, thereby maintaining the dryness and cleanliness of the external environment adjacent to the article. The layered article is adaptable for various applications including protective garments and bedding, offering enhanced utility across different settings.