Absorbent Article Three-Dimensional Mesh Sheet Fluid Transport
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Solution Overview
Problem
Thin absorbent articles using air-laid pulp non-woven fabrics face challenges with low body fluid absorption capacity and gel blocking issues due to excessive high-absorbent polymers, leading to shape loss and inefficient fluid transport.
Innovation Solution
A five-layer structure absorbent article with a three-dimensional opening hole mesh sheet and mechanical emboss processing to form concave portions, combined with a high-absorbent polymer A and B layer configuration, enhances fluid absorption and prevents polymer migration, using a high-absorbent polymer A with rapid water absorption and high-absorbent polymer B with high absorption capacity, and an air-through non-woven fabric for continuous fluid transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the weight per unit area of the air-laid absorber is increased to compensate for low body fluid absorption capacity, then the absorption capacity improves, but the absorber is thickened and the reason for using air-laid is lost
Solution Approach 1:
The invention uses a composite structure combining air-laid pulp non-woven fabric with high-absorbent polymer particles. The air-laid provides bulk and porosity while the high-absorbent polymer particles (superabsorbent polymers) provide enhanced fluid absorption capacity. This composite approach allows achieving high absorption capacity without increasing overall thickness, as the polymer particles are distributed within the air-laid structure rather than adding significant bulk.
Solution Approach 2:
The air-laid pulp non-woven fabric provides a porous three-dimensional structure that allows fluid penetration while the high-absorbent polymer particles are embedded within this porous matrix. The porous structure enables efficient fluid transport to the polymer particles without requiring increased thickness, as the fluid can reach the absorption sites through the existing voids in the air-laid structure.
2Quantity of substance
If the mixed amount of high-absorbent polymer is excessively increased to compensate for low absorption capacity, then the absorption capacity improves, but gel blocking occurs and the absorbent article loses shape
Solution Approach 1:
The invention optimizes the content ratio of high-absorbent polymer particles within the air-laid absorber to a specific range (5-50 mass%). This parameter optimization ensures sufficient absorption capacity while preventing excessive polymer concentration that would cause gel blocking. The controlled polymer content maintains the structural integrity and shape stability of the absorbent article while achieving the desired absorption performance.
Solution Approach 2:
The high-absorbent polymer particles are distributed throughout the air-laid structure rather than concentrated in specific areas. This uniform distribution ensures that absorption capacity is enhanced locally at the particle level without creating excessive polymer concentrations in any single region, thereby preventing gel blocking and maintaining overall shape stability.
3Quantity of substance
If the mixed amount of high-absorbent polymer is excessively increased to compensate for low absorption capacity, then the absorption capacity improves, but the high-absorbent polymer migrates and the absorbent article easily loses shape
Solution Approach 1:
The invention controls the high-absorbent polymer content within the optimal range of 5-50 mass% to prevent migration. This parameter control ensures that enough polymer is present for adequate absorption capacity while preventing excessive polymer that would migrate and compromise shape stability. The optimized content ratio maintains polymer particles in place within the air-laid structure.
Solution Approach 2:
The absorbent article is structured as a composite of air-laid pulp non-woven fabric and discrete high-absorbent polymer particles. This segmentation separates the structural function (air-laid) from the absorption function (polymer particles), preventing polymer migration while maintaining shape stability. The polymer particles are embedded within the air-laid matrix rather than forming a continuous phase that could migrate.
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 solution significantly increases body fluid absorption capacity, prevents gel blocking and shape loss, and ensures rapid fluid transport, maintaining a comfortable fit and efficient fluid handling.
Implementation Method 1
a high-absorbent polymer A layer, and a high-absorbent polymer B layer... as a high-absorbent polymer comprising the high-absorbent polymer A layer, a high-absorbent polymer that has physical values of a high water absorption rate
Implementation Method 2
a high-absorbent polymer that has physical values of a high water absorption rate relative to a high-absorbent polymer comprising the high-absorbent polymer B layer
Implementation Method 3
as the high-absorbent polymer comprising the high-absorbent polymer B layer, a high-absorbent polymer that has physical values of a high absorption capacity
Implementation Method 4
a high-absorbent polymer that has physical values of a high absorption capacity relative to the high-absorbent polymer comprising the high-absorbent polymer A layer
Implementation Method 5
mechanical emboss processing is performed on the three-dimensional opening hole mesh sheet to form a large number of concave portions recessed to a non-skin side
Implementation Method 6
the concave portions temporarily function as a reservoir, the body fluid flows from the small holes rapidly and easily
Implementation Method 7
an air-through non-woven fabric for continuous fluid transfer
Implementation Method 8
an air-through non-woven fabric that has a porous structure
Data Source
AI summary
In an absorbent article a three-dimensional opening hole mesh sheet, having a face which faces skin of a wearer of the absorbent article and a reverse or opposite side face within the absorbent article, is combined with an absorber which includes an air-laid pulp non-woven fabric. The mesh sheet has an array of mechanically embossed concave portions forming protrusions on the skin-facing face of the mesh sheet and recesses on the reverse or opposite face, i.e., the unexposed face inside the absorbent article.