Disposable Diaper Absorber with Variable Bending Rigidity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional disposable diapers face difficulties in easily disengaging the convex and concave members, leading to skin stimulation and crease formation, which can cause the fastening tape to become unsecured during movement.
Innovation Solution
The disposable diaper design incorporates a first region with higher bending rigidity and a second region with lower bending rigidity in the absorber, along with leg and crotch stretch units, to maintain the secured state of the fastening tape while preventing skin stimulation and crease formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the convex member and concave member are made difficult to disengage to prevent leakage, then the fastening security is improved, but the diaper cannot deform with wearer movement and causes skin stimulation
Solution Approach 1:
The absorber is designed with a first region having higher bending rigidity and a second region having lower bending rigidity. The boundary between these regions is positioned between the leg stretch units and the target unit. This local differentiation allows the diaper to maintain fastening security in the front waistline region while enabling deformation in the crotch and leg regions to adapt to wearer movement.
Solution Approach 2:
The absorber is segmented into multiple regions with different rigidity characteristics. The first region (higher rigidity) provides structural support for fastening, while the second region (lower rigidity) allows deformation. This segmentation resolves the contradiction by distributing different functional requirements to different parts of the same component.
2Reliability
If the convex member and concave member are made difficult to disengage to prevent leakage, then the fastening security is improved, but creases are formed that can unsecure the target tape
Solution Approach 1:
By positioning the boundary between high-rigidity and low-rigidity regions at a specific location (between the leg stretch units and target unit), the design allows creases to form in the low-rigidity second region away from the fastening area, preventing crease-induced unsecuring while maintaining fastening security through the high-rigidity first region.
3Stability of the object's composition
If the absorber has uniform high bending rigidity to maintain structure, then the fastening tape remains secured, but the diaper cannot adapt to body shape changes
Solution Approach 1:
The absorber exhibits different bending rigidities in different regions: the first region maintains higher rigidity for structural stability and fastening support, while the second region has lower rigidity to allow deformation and adaptation to body shape changes. This local quality differentiation resolves the contradiction between stability and adaptability.
Solution Approach 2:
The diaper structure transitions from a static uniform rigidity design to a dynamic system where different regions can deform independently. The low-rigidity second region dynamically adapts to body movements while the high-rigidity first region maintains fastening stability, allowing the system to respond to changing conditions.
Data Source
AI summary
An absorber 40 of a disposable diaper 10 includes a first region extending from an end at the side of the front waistline region of the absorber towards the side of the crotch region, and a second region arranged adjacent to the first region at the side of the crotch region from the first region, and having a lower bending rigidity than the first region. A boundary between the first region and the second region is arranged at the side of the front waistline region from the end at the side of the front waistline region of the leg stretch units, and is arranged at the side of the crotch region from the end at the side of the crotch region of the target unit.