Absorbent Composite Material for Sanitary Products
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Solution Overview
Problem
Lofty, resilient nonwoven webs used in sanitary products lack absorbency and exhibit poor rewet properties, releasing fluid under pressure.
Innovation Solution
An absorbent composite material with a fibrous matrix, superabsorbent polymer, and an absorbent mixture, including a binder and adhesive, arranged between a liquid-permeable cover layer and a liquid-impermeable barrier layer, providing superior fluid handling characteristics while maintaining resilience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If lofty, resilient nonwoven webs are used to provide comfort and conformability, then user comfort is improved, but absorbency deteriorates
Solution Approach 1:
The patent combines lofty resilient nonwoven webs with superabsorbent polymers and absorbent mixtures to create a composite absorbent composite material that simultaneously provides comfort and superior absorbency
Solution Approach 2:
The patent applies different materials with different properties to different regions: the nonwoven web provides comfort where it contacts the user, while superabsorbent polymer regions provide absorbency where fluid needs to be captured
2Stability of the object's composition
If lofty, resilient nonwoven webs are used to maintain shape retention, then structural stability is improved, but rewet properties deteriorate
Solution Approach 1:
The composite structure combines shape-retaining nonwoven webs with superabsorbent polymers that lock away fluid, preventing rewet while maintaining structural stability
Solution Approach 2:
The superabsorbent polymer acts as an intermediary that absorbs and locks away fluid, preventing it from migrating back to the nonwoven web and causing rewet
3Ease of operation
If low density nonwoven webs are used to provide softness, then comfort is improved, but fluid absorption capability deteriorates
Solution Approach 1:
The patent creates a composite where low-density nonwoven webs provide softness and comfort, while dispersed superabsorbent polymer particles provide high fluid absorption capability
Solution Approach 2:
Different regions of the absorbent composite material have different properties: the nonwoven web regions provide softness and comfort, while the superabsorbent polymer regions provide fluid absorption capability
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 absorbent composite material achieves superior fluid absorption and retention, maintaining shape in both dry and wet states, and exhibits enhanced resiliency and fluid handling properties.
Implementation Method 1
superabsorbent polymer dispersed within the fiber matrix
Implementation Method 2
the absorbent mixture including superabsorbent polymer and adhesive
Implementation Method 3
lofty, resilient, nonwoven webs that have a high degree of loft and the tendency to retain such loft in both the dry and wet state
Data Source
AI summary
The present invention relates to an absorbent composite material and a absorbent article including such absorbent composite material. More particularly, the present invention relates to an absorbent composite material for use in sanitary absorbent products such as sanitary napkins, pantiliners, diapers, adult incontinence products, and the like.