Refastenable Absorbent Article Side Seam Closure
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Solution Overview
Problem
Refastenable pull-on disposable absorbent articles, such as diapers, often have side seams that are easily opened but poorly secured after re-closing, leading to inadequate side seam strength and security.
Innovation Solution
The design incorporates separate closure members for the initial and subsequent waist opening forces, with fastening components initially disposed in a non-engaged orientation to allow independent control of opening forces, and permanent side seams formed using bonding techniques like thermal or ultrasonic bonding for robust closure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fastening components are designed to deliver low initial opening force, then ease of operation is improved, but side seam strength deteriorates
Solution Approach 1:
The closure system is divided into two distinct components: a first closure member (permanent bond) for initial closure and a second closure member (refastenable fasteners) for subsequent refastening. This segmentation allows each component to be optimized for its specific function - the permanent bond provides strong initial closure while the refastenable fasteners provide easy opening and closing operations.
Solution Approach 2:
Different regions of the absorbent article have different closure properties. The first closure member creates a permanent bond along the side seam for structural strength, while the second closure member provides localized refastenable fasteners at specific positions for ease of operation. Each region is tailored to its specific functional requirement.
2Device complexity
If fastening components are initially engaged, then device complexity is reduced, but adaptability deteriorates
Solution Approach 1:
The closure system separates the initial closure function (permanent bond) from the refastening function (refastenable fasteners). This allows the fastening components to be initially engaged for simple application, yet the refastenable portion can be independently controlled for adaptability during use.
Solution Approach 2:
The closure system transitions from a static initially-engaged state to a dynamic refastenable state. The refastenable fasteners allow the closure to be opened and re-closed multiple times, providing adaptability while maintaining a relatively simple overall structure.
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 approach enhances the security and stability of the side seam closure after refastening, providing a more reliable and robust attachment system while maintaining ease of application and removal for caregivers.
Implementation Method 1
permanent side seams formed using bonding techniques like thermal or ultrasonic bonding
Implementation Method 2
permanent side seams formed using bonding techniques like thermal or ultrasonic bonding
Data Source
AI summary
An absorbent article is provided that comprises a front waist region, a back waist region, a crotch region disposed between the front waist region and the back waist region, a front waist end edge, a back waist end edge, a longitudinal axis extending from a mid-point of the front waist end edge to a mid-point of the back waist end edge, a first longitudinally extending side edge, a second longitudinally extending side edge, an exterior surface, an interior surface, a topsheet, a backsheet, and an absorbent core disposed between the backsheet and the topsheet. A portion of the front waist region and a portion of the back waist region are joined in a surface to surface relationship to form a pant comprising a first permanent side edge seam and a laterally opposed second permanent side edge seam. The first and second permanent side edge seams define an initial waist opening circumference and a pair of leg openings. The absorbent article comprises a first fastening component comprising a first fastening surface and a first attachment surface. The absorbent article comprises a second fastening component comprising a second fastening surface. The initial waist opening circumference formed by the first and second permanent side edge seams is configured to be opened. The first fastening surface and the second fastening surface are configured to be refastenably engaged and separated with each other.