Absorbent Article Elastic Region Arrangement for Fit
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Solution Overview
Problem
Conventional disposable diapers face issues with leakage due to waist deformation and poor fastening, especially in active users, and existing testing methods fail to accurately predict the fit and stability of absorbent articles on users.
Innovation Solution
An absorbent article with strategically arranged elastic regions and a mechanical fastening system, including a hook-and-loop fastening mechanism, to ensure a comfortable, secure fit and prevent slippage during waist expansion and contraction cycles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If elastic material is used in waist portions to provide form-fitting properties, then the fit and appearance of the diaper are improved, but the breathability and cost increase
Solution Approach 1:
The diaper is divided into multiple waist portions (front waist portion and rear waist portion) with different structural configurations. The front waist portion includes elastic gather material integrated into the chassis, while the rear waist portion uses elastic material attached to the backsheet. This segmentation allows each waist portion to be optimized for its specific functional requirements while maintaining overall form-fitting properties.
Solution Approach 2:
Different elastic material configurations are applied to different locations of the diaper. The front waist portion uses elastic gather material with specific grain directions (machine direction and cross direction) to provide gathering and form-fitting. The rear waist portion uses elastic material attached to the backsheet for a different type of fit. This local differentiation optimizes breathability and fit in each specific area.
2Shape
If elastic material is used in waist portions to provide form-fitting properties, then the fit and appearance of the diaper are improved, but the cost increases
Solution Approach 1:
The diaper is divided into multiple waist portions (front waist portion and rear waist portion) with different structural configurations. The front waist portion includes elastic gather material integrated into the chassis, while the rear waist portion uses elastic material attached to the backsheet. This segmentation allows each waist portion to be optimized for its specific functional requirements while maintaining overall form-fitting properties.
Solution Approach 2:
Different elastic material configurations are applied to different locations of the diaper. The front waist portion uses elastic gather material with specific grain directions (machine direction and cross direction) to provide gathering and form-fitting. The rear waist portion uses elastic material attached to the backsheet for a different type of fit. This local differentiation optimizes breathability and fit in each specific area.
3Reliability
If the diaper is fastened tightly around the waist to prevent leakage, then the resistance to leakage is improved, but the comfort and fit deteriorate when the user moves
Solution Approach 1:
The diaper incorporates elastic materials in the waist portions that dynamically adapt to user movement. The elastic gather material in the front waist portion and elastic material in the rear waist portion allow the diaper to expand and contract with the user's waist movements, maintaining both security against leakage and comfort during activity.
Solution Approach 2:
The elastic materials change their physical parameters (extension, contraction) in response to user movement. The elastic gather material can extend when the user's waist expands during movement and contracts when the waist returns to normal, maintaining consistent fit and leakage protection throughout the movement cycle.
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 solution provides a reliable, comfortable fit and prevents leakage by maintaining the absorbent article in place during normal use, even in active users, through tailored elastic regions and a secure fastening system.
Implementation Method 1
a first elastic region in the rear waist region... At least one of the rear side panels has a second elastic region
Implementation Method 2
a mechanical fastening system, especially a hook-and-loop fastening means, for fastening the absorbent article around the waist of a user
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
An elasticized absorbent article having a chassis including a topsheet, a backsheet and an absorbent structure. The rear waist region of the chassis includes a first elastic region. A pair of opposed rear side panels is attached to the chassis at the rear waist region. One or both of the side panels includes a second elastic region. The article also includes fastening means. The elastic regions are arranged so as to reduce the risk of incorrect fastening of the absorbent article around the waist of the user and so that the absorbent article will have an improved and comfortable fit, attractive appearance and the capability to stay in place during normal use. This is achieved by arranging the absorbent structure so that it terminates a first distance from the transverse edge of the rear waist region and a second distance from the first elastic region; and by arranging fastening tabs on a transverse axis extending between the absorbent structure and the first elastic region.