Absorbent Article Leakage-Preventing Unit Elastic Member Segmentation
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Solution Overview
Problem
Conventional absorbent articles with leakage-preventing units experience deformation and discomfort due to shrinkage of elastic members, leading to the end unit regions falling excessively towards the central absorbing surface, which compromises the article's form stability and wearer comfort.
Innovation Solution
The absorbent article incorporates a leakage-preventing unit design with a central region and end unit regions, where elastic members are fixed at the boundary between the central and end regions, and free ends are not fixed, with joint processing units to stabilize the form and maintain flexibility by controlling the shrinkage of elastic members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If elastic members are extended and fixed at the outer ends in end unit regions, then the leakage-preventing units can expand and contract along the longitudinal direction, but the end unit regions fall excessively towards the central region due to shrinkage, causing deformation of the absorbent article's form
Solution Approach 1:
The leakage-preventing unit is divided into a central region and end unit regions, with elastic members having fixed units in the central region and free ends in the end unit regions. This segmentation allows different parts to have different functions: the central region provides expansion/contraction capability while the end unit regions maintain form stability without excessive falling.
Solution Approach 2:
Different regions of the leakage-preventing unit are given different properties: the central region has elastic members fixed at both ends to enable expansion and contraction, while the end unit regions have elastic members with free ends to prevent excessive falling and maintain local form stability.
2Stability of the object's composition
If the end unit regions are joined to form one part with the absorber to stabilize the form, then the form stability is improved, but the flexibility of the end unit regions is lost, worsening wearer comfort
Solution Approach 1:
The end unit regions are segmented from the absorber through the non-joint processing unit, creating a boundary where the elastic members are free to move. This segmentation allows the end unit regions to maintain form stability through the joint processing unit while preserving flexibility in the non-joint processing unit for wearer comfort.
Solution Approach 2:
The end unit regions have different properties in different zones: the joint processing unit provides form stability through joining with the absorber, while the non-joint processing unit maintains flexibility and softness for wearer comfort, creating local quality differentiation.
3Stability of the object's composition
If the area of joint processing is increased to stabilize the form, then the form stability is improved, but the flexibility of the end unit regions is further reduced, worsening wearer comfort
Solution Approach 1:
Instead of joining the entire end unit region to the absorber, only a partial area (joint processing unit) is joined, while the rest (non-joint processing unit) remains unjoined. This partial action provides sufficient form stability while preserving flexibility in the unjoined area for wearer comfort.
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
This design prevents excessive falling of end unit regions, maintains the absorbent article's stability, and enhances wearer comfort by reducing the area of joint processing, thus minimizing the loss of flexibility and preventing meandering and buckling of free ends.
Implementation Method 1
the leakage-preventing units are configured by elongated elastic members (for example, rubber) that expand and contract in the longitudinal direction of the absorbent article
Data Source
AI summary
A leakage-preventing unit 50 of an absorbent article 1 is formed by elastic members 51 and sheets 52. The leakage-preventing unit 50 includes a central region C and a pair of end unit regions S positioned outside a longitudinal direction L from the central region C.The elastic members 51 includesa fixed unit 51A fixed to the sheet 52 in a state when the elastic members 51 extend in the longitudinal direction L and a free end 51B positioned outside the longitudinal direction L from the fixed unit 51A, which is not fixed to the sheet 52. The end unit regions S includes a joint processing unit 53A in which a joint process for joining the portions where the sheets 52 face each other is performed and a non-joint processing unit 53B in which the joint process is not performed. The free end 51B is arranged in the non-joint processing unit 53B.