Disposable Hygiene Product Topsheet and Acquisition Layer Liquid Handling
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Solution Overview
Problem
Existing disposable absorbent hygiene products face challenges in effectively managing liquid handling and leakage security, particularly in incontinence products for adults, where the distribution of absorption capacity and material efficiency can be improved to enhance user comfort and reduce leakage risks.
Innovation Solution
A disposable absorbent hygiene product design featuring a liquid permeable topsheet and impermeable backsheet with an absorbent assembly divided into front, central, and back regions, where the central region concentrates the majority of the absorption capacity, utilizing hydrophilically treated polypropylene nonwovens and an acquisition layer for enhanced liquid handling and retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the absorbent assembly uses uniform distribution of absorption capacity throughout, then the product provides consistent absorption across the entire area, but the material spend and cost increase without targeted efficiency
Solution Approach 1:
The absorbent assembly implements non-uniform distribution of absorption capacity by concentrating the majority of absorbent material in the central region while reducing material in front and back regions. This local quality differentiation optimizes material spend by placing absorption capacity precisely where it is most needed for leakage security, rather than uniformly distributing material across the entire product area.
Solution Approach 2:
The absorbent assembly is segmented into distinct regions (front region, central region, and back region) with different absorption capacity distributions. This segmentation allows the product to achieve targeted leakage security in the central area while reducing material spend in less critical areas, resolving the contradiction between reliability and material efficiency.
2Reliability
If the product uses larger physical dimensions to cover the urogenital area and ensure proper fitting, then the leakage security and comfort improve, but the material spend and cost increase
Solution Approach 1:
The product applies local quality by concentrating high absorption capacity in the central region where leakage risk is highest, while using reduced absorption capacity in front and back regions. This allows the product to maintain large physical dimensions for proper coverage and fitting while optimizing material spend through non-uniform distribution of absorbent materials.
3Reliability
If the topsheet and acquisition layer use standard materials with conventional properties, then the manufacturing process is simple and cost-effective, but the liquid handling performance and user comfort are insufficient
Solution Approach 1:
The topsheet and acquisition layer utilize parameter changes by selecting materials with specific basis weights and structural properties optimized for liquid handling. The topsheet uses a lighter weight material (8-20 g/m2) while the acquisition layer uses a heavier material (40-60 g/m2), creating a gradient structure that enhances liquid distribution and handling performance while maintaining manufacturability through conventional nonwoven materials.
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 product achieves improved liquid handling and reduced leakage by concentrating absorption capacity in the central region, providing a balanced liquid distribution and retention capacity, thus enhancing user comfort and reducing material usage while maintaining effective leakage security.
Implementation Method 1
The liquid permeable topsheet material comprises hydrophilically treated polypropylene spunbond nonwoven or spunbond/meltblown composite nonwoven
Implementation Method 2
An acquisition layer material is provided sandwiched between the topsheet and the absorbent assembly, being an air through bonded nonwoven having a basis weight of from 40 to 60 g/m2
Data Source
AI summary
A disposable absorbent hygiene product is provided, including a main part having a body facing surface intended to face the body of a user and a garment facing surface intended to face away from the body of a user. The main part includes a liquid permeable topsheet at the body facing surface, a liquid impermeable backsheet at the garment facing surface, and an absorbent assembly arranged between the topsheet and the backsheet. The liquid permeable topsheet material includes a hydrophilically treated polypropylene spunbond nonwoven or spunbond/meltblown composite nonwoven, having a basis weight of from 8 to 20 g/m2. An acquisition layer material is provided sandwiched between said topsheet and said absorbent assembly, being an through air bonded nonwoven.