Stretchable Waistband Structure to Prevent Diaper Rolling
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Solution Overview
Problem
Open form disposable absorbent articles lack a continuous stretchable waistband that maintains contact with the wearer's body, leading to rolling, flipping, and scrunching during wear, and existing solutions like additional fastening elements or high stiffness compromise comfort and cost-effectiveness.
Innovation Solution
Incorporating a first waist region with a resiliency greater than 5 mJ and stiffness less than 10 N, along with specific design features such as corrugation regularity and uniformity, to create a stretchable waistband that maintains contact with the wearer and minimizes rolling, flipping, and scrunching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If additional fastening elements are used to secure the loose ends of the front of the product, then rolling, flipping and scrunching are reduced, but cost increases and skin irritation risk increases
Solution Approach 1:
The waistband is designed to be self-gathering through its elastic properties and configuration, eliminating the need for additional fastening elements. The elastic waistband automatically adjusts and secures itself to the wearer's body, providing stability without requiring extra components that would increase manufacturing cost or skin irritation risk.
Solution Approach 2:
The invention changes the physical parameters of the waistband by specifying elastic properties (resiliency greater than 5 mJ and stiffness less than 10 N) and configuration (continuous stretchable structure). These parameter changes enable the waistband to provide sufficient stability through its inherent elastic gathering action without requiring additional fastening elements.
2Stability of the object's composition
If regions of high stiffness are used to provide additional support to the waist region, then rolling and flipping are resisted, but comfort decreases due to inability to conform to body changes
Solution Approach 1:
The invention optimizes the stiffness parameter of the waistband by specifying that it should be less than 10 N, which is sufficiently low to allow the waistband to conform to body changes during wear. This parameter change resolves the contradiction by demonstrating that adequate stability can be achieved through proper elastic configuration rather than high stiffness.
Solution Approach 2:
The waistband is designed as a dynamic, elastic structure that can continuously adjust to body movements and shape changes. This dynamic property allows the waistband to maintain stability while adapting to the wearer's posture, breathing, and other body changes, thereby providing both stability and comfort.
3Ease of operation
If stretchable materials are employed in the waist region of an open form absorbent article, then comfort and flexibility are improved, but continuous contact with the body is not maintained leading to rolling and flipping
Solution Approach 1:
The waistband is designed as a dynamic elastic structure that continuously adapts to body movements. The elastic properties allow the waistband to stretch and flex with the wearer while maintaining continuous contact through its self-gathering action, resolving the contradiction between flexibility and continuous contact.
Solution Approach 2:
The elastic waistband serves itself by automatically gathering and securing to the body through its inherent elastic properties. This self-service mechanism ensures continuous contact is maintained without requiring additional fastening elements or high stiffness, thereby maintaining both flexibility and continuous contact.
4Stability of the object's composition
If a continuous stretchable waistband is implemented, then rolling and flipping are prevented, but device complexity increases
Solution Approach 1:
The invention achieves continuous contact and prevents rolling by optimizing the physical parameters of a simple waistband structure. By specifying elastic resiliency greater than 5 mJ and stiffness less than 10 N, the patent demonstrates that a relatively simple waistband configuration can provide the desired stability without requiring complex multi-component structures.
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 comfortable, flexible, and cost-effective waistband that maintains continuous contact with the wearer, resisting rolling, flipping, and scrunching while adapting to body movements.
Implementation Method 1
the first waist region has a resiliency of greater than about 5 mJ and a stiffness of less than about 10 N
Data Source
AI summary
A disposable absorbent article is disclosed that includes a first waist region, a second waist region, a crotch region disposed between the first waist region and second waist region, a waist edge in the first waist region, at least one waistband in the first waist region, at least one fastener in the second waist region, and at least one discrete landing zone in the first waist region, the discrete landing zone comprising an lateral inboard edge, wherein the discrete landing zone and the waistband overlap to form an overlap region in the first waist region, and wherein the waistband does not overlap the lateral inboard edge of the discrete landing zone.