Absorbent Core Sealing Arrangement for Sag Prevention
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Solution Overview
Problem
Conventional absorbent articles, such as diapers, tend to sag when wet, leading to discomfort and reduced fit due to inadequate liquid handling and flexibility.
Innovation Solution
An absorbent article design featuring an absorbent core sandwiched between a liquid-permeable topsheet and a liquid-impermeable backsheet, with a sealing arrangement that includes channel sealings and connecting sealings along the longitudinal and transverse axes, providing a closed structure that maintains absorbent material within and enhances rigidity, particularly in the crotch portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the absorbent core is enclosed by a core cover with sealing arrangement, then the absorbent material containment is improved, but the device complexity increases
Solution Approach 1:
The sealing arrangement is divided into multiple functional components: side seams extending along the longitudinal edges and connecting seams joining the side seams at the front and back. This segmentation allows each component to perform its specific sealing function independently, ensuring reliable absorbent material containment while maintaining manufacturing simplicity through modular construction.
2Stability of the object's composition
If the crotch portion is reinforced to prevent sagging, then the stability is improved, but the weight increases
Solution Approach 1:
The core cover and sealing arrangement are specifically configured in the crotch portion to provide enhanced structural support where needed. The side seams and connecting seams create a enclosed structure that prevents sagging in the crotch area without requiring additional materials throughout the entire article, thus maintaining stability improvement while minimizing weight increase.
Data Source
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AI summary
The present disclosure relates to an absorbent article (1) comprising an absorbent core (5) sandwiched between a liquid-permeable topsheet (3) and a liquid-impermeable backsheet (4), said article (1) being arranged along a longitudinal axis (y1) and a transversal axis (x1) extending in a perpendicular direction in relation to the longitudinal axis (y1) and said article (1) defining a front portion (6), a back portion (7) and a crotch portion (8), wherein said absorbent core (5) comprises an absorbent component (5a, 5b, 5c) enclosed by a core cover (11, 12) comprising an upper side (11) and a lower side (12), and a sealing arrangement (15, 16, 27, 28) for joining said upper and lower sides (11, 12), wherein said sealing arrangement (15, 16, 27, 28) comprises two side seams (15, 16) extending along two side edges (25, 26) in the direction of the longitudinal axis (y1) of said core (5), wherein said sealing arrangement (15, 16, 27, 28) further comprises at least one transversally oriented connecting sealing (27, 28), said at least one connecting sealing (27, 28) joining said side seams (15, 16), wherein said sealing arrangement (15, 16, 27, 28) further comprises welding spots (24), wherein the sum of the area of the welding spots (24) is constant along the direction of the transversal axis (x1).