Absorbent Article Top Sheet with High-Density Joined Recesses
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Solution Overview
Problem
Absorbent articles with through-hole sections in the top sheet suffer from low joining strength between the top sheet and the absorbent body, leading to potential detachment and impaired absorption performance during user movement.
Innovation Solution
The absorbent article features a top sheet with raised sections and furrow sections, where the second recess sections are joined to the absorbent body at the second bottom sections with high fiber density, while the first bottom sections are not joined, allowing for increased peel strength and deformation to absorb external forces, minimizing detachment and maintaining softness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If through-hole sections are provided in the top sheet to increase freedom of movement and softness, then the softness and skin feel are improved, but the joining strength between the top sheet and absorbent body is reduced
Solution Approach 1:
The top sheet is designed with different fiber densities in different regions: high fiber density at the bottom sections (for strong joining) and low fiber density at the surface sections (for softness). This local differentiation allows the bottom sections to provide strong anchoring to the absorbent body while the surface sections maintain softness and comfort against the skin.
Solution Approach 2:
The top sheet is segmented into multiple functional regions: raised sections, furrow sections, first recess sections, and second recess sections. The second recess sections specifically provide through-holes for freedom of movement, while the bottom sections provide joining areas. This segmentation allows different parts to fulfill different functions simultaneously.
2Ease of manufacture
If the perimeter sections of through-hole sections are used for joining, then the top sheet can be attached to the absorbent body, but the contact area is too small to ensure sufficient joining strength
Solution Approach 1:
Instead of relying solely on the perimeter sections (one-dimensional boundary) for joining, the invention utilizes the entire bottom section area (two-dimensional surface) for joining. The bottom sections extend into the absorbent body, providing a much larger contact area and significantly enhancing joining strength.
Solution Approach 2:
The bottom sections are specifically designed with high fiber density to provide strong joining capability, while other regions maintain different properties for their respective functions. This local quality differentiation ensures optimal joining strength at the interface with the absorbent body.
3Strength
If the top sheet is joined to the absorbent body at multiple points, then joining strength is improved, but the freedom of movement and softness of the top sheet is reduced
Solution Approach 1:
The top sheet is divided into joined regions (bottom sections) and non-joined regions (surface sections and raised sections). This segmentation allows the bottom sections to provide anchoring while the surface sections maintain freedom of movement and softness, resolving the contradiction between joining strength and flexibility.
Solution Approach 2:
Different regions of the top sheet have different joining characteristics: the bottom sections have high fiber density and are joined to the absorbent body, while the surface sections have low fiber density and remain unjoined to maintain softness. This local differentiation allows simultaneous achievement of strong joining and freedom of movement.
Data Source
AI summary
An absorbent article for minimizing detachment between a top sheet and absorbent body, for stably maintaining an absorption performance, while maintaining a satisfactory feel on a skin of the top sheet. The top sheet has a plurality of raised sections extended in a lengthwise direction at predetermined intervals in a widthwise direction, and a plurality of furrow sections extended in the lengthwise direction between the raised sections. The furrow section has a first recess section including a first bottom section, and a plurality of second recess sections inside the first recess section. The second recess section includes a second bottom section having a highest fiber density of the top sheet. A portion at a second surface of a top section of the raised section is not joined to an absorbent body. The second bottom section of the second recess section of the furrow section is joined to the absorbent body.