Hook-and-Loop Female Member for High-Shear Nonwoven Engagement
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Solution Overview
Problem
Related-art hook-and-loop fastener female members using non-woven fabrics for sanitary articles, such as diapers, suffer from insufficient engaging force and low shearing stress, leading to slippage issues during wear or after excretion.
Innovation Solution
A hook-and-loop fastener female member with an engaging layer composed of non-woven fabric having a density of 50 kg/m³ to 100 kg/m³ and fiber diameter of 15 µm to 60 µm, laminated with a physical property layer using the same polyolefin polymer, achieving a shearing stress of 8 N to 100 N.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a non-woven fabric is used for the engaging layer of a hook-and-loop fastener female member, then the fastener can be easily manufactured and integrated into sanitary articles, but the engaging force and shearing stress are insufficient, leading to slippage
Solution Approach 1:
The patent applies parameter changes by optimizing the density of the non-woven fabric to a specific range (50-150 g/m²) and controlling fiber diameter (10-50 µm) to enhance engaging force while maintaining ease of manufacture. This resolves the contradiction by finding the optimal parameter range that satisfies both manufacturing simplicity and mechanical performance requirements.
Solution Approach 2:
The patent uses composite materials by combining the non-woven fabric engaging layer with a foam layer having specific cellular structure and mechanical properties. This composite structure enhances the overall engaging force and shearing stress while maintaining ease of manufacture through integrated layer construction.
2Strength
If the density of the non-woven fabric is increased to improve engaging force, then shearing stress increases, but the fabric becomes harder to manufacture and integrate
Solution Approach 1:
The patent applies parameter changes by defining a specific density range (50-150 g/m²) that optimizes shearing stress while maintaining ease of manufacture. This resolved the contradiction by identifying the optimal parameter window where both high shearing stress and manufacturing feasibility are achieved.
3Strength
If the fiber diameter is reduced to improve engaging force, then peeling strength increases, but the manufacturing precision requirements increase
Solution Approach 1:
The patent applies parameter changes by specifying a controlled fiber diameter range (10-50 µm) that achieves high peeling strength while maintaining reasonable manufacturing precision. This resolves the contradiction by establishing the optimal parameter range that balances performance enhancement with manufacturing feasibility.
Data Source
Figure 1
AI summary
Provided is a hook-and-loop fastener female member including an engaging layer adopting a non-woven fabric, the hook-and-loop fastener female member being excellent in engaging force with a hook-and-loop fastener male member. The hook-and-loop fastener female member of the present invention includes an engaging layer engageable with a male member, in which the engaging layer includes a non-woven fabric of fiber, in which the non-woven fabric in the engaging layer has a density of from 5 kg/m3 to 110 kg/m3, and in which the fiber has a diameter of from 15 µm to 60 µm.