Diaper Core Concave Structure for Faster Urine Absorption
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Solution Overview
Problem
Existing diapers have a smooth surface that causes urine to accumulate on the surface, leading to poor absorption and a poor user experience due to the fluffy fabric inside not being fully utilized.
Innovation Solution
A diaper core design with a wrapping fabric, fluffy fabric, and non-woven fabric, featuring recessed concave parts and openings to guide urine to absorption areas, enhancing absorption capacity and rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a smooth surface is used in the diaper, then the surface is easy to manufacture and has good comfort, but urine accumulates on the surface and absorption capacity decreases
Solution Approach 1:
The diaper surface is designed with different local qualities: the surface layer maintains smoothness for comfort and ease of manufacture, while the absorption layer contains concave parts and openings to enhance urine absorption. This local differentiation allows the smooth surface to coexist with high absorption capacity.
Solution Approach 2:
The invention introduces vertical dimensionality by creating concave parts and openings in the absorption layer, transforming the flat two-dimensional surface into a three-dimensional structure with varying depths and volumes, thereby increasing urine storage and absorption capacity without compromising surface smoothness.
2Ease of manufacture
If a smooth surface is used in the diaper, then the manufacturing process is simple, but urine absorption rate is slow
Solution Approach 1:
The absorption layer is designed with local quality variations through concave parts and openings, creating high-absorption zones that accelerate urine uptake, while the surface layer remains smooth for manufacturing simplicity. This localized enhancement improves absorption rate without complicating overall manufacturing.
Solution Approach 2:
The concave parts and openings are pre-formed in the absorption layer during manufacturing, creating ready-made channels and spaces that immediately guide and accelerate urine flow to absorption materials, thereby improving absorption rate from the outset without requiring complex post-processing.
3Ease of manufacture
If the fluffy fabric is covered with a smooth surface layer, then the surface is comfortable and easy to manufacture, but the fluffy fabric cannot be fully utilized
Solution Approach 1:
By creating concave parts and openings in the absorption layer, the invention adds vertical dimensionality that allows urine to penetrate directly to the fluffy fabric in three-dimensional spaces, bypassing the smooth surface layer and fully utilizing the absorption capacity of the fluffy fabric.
Solution Approach 2:
The concave parts and openings act as intermediaries between the smooth surface layer and the fluffy fabric, facilitating efficient urine transfer from the surface to the absorption materials, thereby enabling the fluffy fabric to be fully utilized despite being covered by the smooth surface layer.
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
Improves urine absorption capacity and rate, reducing surface accumulation and enhancing hygiene and user experience.
Implementation Method 1
the non-woven fabric is recessed downwards at a position corresponding to the opening of the fluffy fabric until it is connected to the wrapping fabric lower surface, thereby forming a non-woven fabric concave part on the non-woven fabric
Implementation Method 2
the fluffy fabric being attached with polymer particles
Data Source
Figure 1~2B
Figure 3~4B
Figure 4C~5B
AI summary
The present invention relates to a diaper core, a diaper equipped with the diaper core, and a method for preparing the same. The diaper core comprises: a wrapping fabric comprising a wrapping fabric lower surface, a wrapping fabric side surface, and a wrapping fabric upper surface that are integrally connected to form a receiving cavity inside the wrapping fabric; at least one layer of fluffy fabric disposed inside the receiving cavity and above the wrapping fabric lower surface, the middle of the fluffy fabric being provided with an opening of a predetermined length and predetermined width, and the fluffy fabric being attached with polymer particles; and a non-woven fabric disposed in the receiving cavity and located above the at least one layer of fluffy fabric; wherein the upper surface of the wrapping fabric and the non-woven fabric are recessed downwards at a position corresponding to the opening of the fluffy fabric until they are connected to the wrapping fabric lower surface, thereby forming a wrapping fabric concave part on the wrapping fabric upper surface and a non-woven fabric concave part on the non-woven fabric. The present invention improves capacity and rate of the diaper core to absorb urine, thereby enhancing hygiene and user experience of the diaper.