Absorbent Pad Elastic Layout for Leakage Control and Positioning
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Solution Overview
Problem
Existing absorbent pads face challenges in manufacturing efficiency and material spillage during production, particularly for shaped cores, and lack effective measures to prevent lateral leakage and ensure correct placement and security against rear-end leakage.
Innovation Solution
The absorbent pad design features an elastic element between the topsheet and backsheet outside the longitudinal side edges, with a varying width of no more than 25 mm, promoting a cup-shape and visual cues for correct placement, reducing lateral leakage, and ensuring the rear portion remains flat for improved security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If shaped absorbent core is used for indication of correct positioning, then correct positioning is improved, but material spillage during forming and cutting increases
Solution Approach 1:
The elastic elements are pre-positioned outside the longitudinal side edges of the absorbent core, creating visual cues and structural guidance before the product is even used. This preliminary arrangement guides correct placement without requiring complex shaping of the absorbent core itself, thereby reducing material waste during core formation and cutting operations.
Solution Approach 2:
Instead of relying solely on the shape of the absorbent core (two-dimensional contour), the invention adds elastic elements positioned outside the core edges, creating a three-dimensional structural indication system. This multi-dimensional approach provides clear visual and tactile cues for correct positioning while keeping the absorbent core itself simple and rectangular, minimizing material spillage during manufacturing.
2Reliability
If elastic elements are added for shaping and forming, then lateral leakage is reduced, but device complexity increases
Solution Approach 1:
The elastic elements are extracted from the traditional position within or along the edges of the absorbent core and repositioned outside the longitudinal side edges. This separation allows the elastic elements to function independently for shaping and lateral leakage prevention without complicating the absorbent core structure itself, maintaining manufacturing simplicity while achieving the desired reliability.
Solution Approach 2:
The elastic elements positioned outside the core serve multiple functions simultaneously: they provide structural shaping, prevent lateral leakage, and create visual cues for correct positioning. This multi-functionality reduces the need for additional separate components, thereby limiting the increase in device complexity while achieving multiple performance improvements.
3Adaptability or versatility
If elastic elements extend along front and intermediate portions, then fitting in crotch region is enhanced, but manufacturing complexity increases
Solution Approach 1:
The elastic elements are strategically positioned to extend along the front and intermediate portions of the absorbent pad, providing enhanced fitting and shaping exactly where needed in the crotch region. The rear portion maintains a simpler flat structure. This localized application of complexity achieves superior adaptability where required while keeping overall manufacturing complexity manageable through clear, segmented design guidelines.
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 minimizes material spillage during production, enhances fitting in the crotch region, reduces lateral leakage, and provides visual cues for correct placement, thereby improving user confidence and security against rear-end leakage.
Implementation Method 1
an elastic element is disposed between the fluid permeable topsheet and the backsheet outside of a respective longitudinal side edge of the absorbent core
Data Source
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Figure 2
AI summary
The absorbent pad (1) as disclosed herein has first and second longitudinal pad side edges (2, 3) and front and rear pad end edges (4, 5). The absorbent pad (1) comprises a fluid permeable topsheet (6), a backsheet (7) and an absorbent core (8) including a first core layer (18) being located between the topsheet (6) and the backsheet (7). The absorbent core (8) has first and second longitudinal side edges (8a, 8b) and front and rear end edges (8c, 8d). The absorbent core (8) in its longitudinal direction (L) has a front portion (9), a rear portion (10) and an intermediate portion (11) located between the front portion (9) and the rear portion (10), the front portion (9), the rear portion (10) and the intermediate portion (11) being of equal lengths. An elastic element (12, 13) is disposed between the fluid permeable topsheet (6) and the backsheet (7) outside of the respective longitudinal core side edges (8a, 8b). A width (w) of the absorbent core (8) in the front portion (9) and the intermediate portion varies no more than 25 mm along a length (l) of the absorbent core (8) extending in the longitudinal direction (L) of the absorbent core (8). The respective elastic elements (12, 13) each extends along at least a part of the front portion (9) and over at least 30% of the intermediate portion (10).