Wing-Shaped Flap Embossing for Absorbent Article Curl Prevention
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Solution Overview
Problem
Wing-shaped flaps with irregular outlines in absorbent articles tend to curl or twist during attachment, leading to an unnatural fit due to insufficient hardness at protruding portions.
Innovation Solution
The implementation of dot embosses along the outer edge of the wing-shaped flaps, with larger functional embosses at convex portions to increase hardness and prevent curling, and strategically placing these embosses relative to the outline's convex and concave features to enhance attachment and design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the wing-shaped flaps have wavy or curved outlines to improve exterior design and facilitate attachment, then the aesthetic appearance and ease of attachment are improved, but the structural stability is worsened causing curling or twisting
Solution Approach 1:
The patent applies different embossing patterns at different locations on the wing-shaped flap. Dot embosses are provided along the entire outer edge, while functional embosses (larger in area) are specifically placed at convex portions where the outline protrudes outward. This local differentiation provides targeted structural support at critical areas without compromising the overall wavy or curved shape design.
Solution Approach 2:
The embosses are pre-formed on the wing-shaped flap before attachment to the undergarment. These embosses create preliminary hardness and structural rigidity in the flap material, particularly at convex portions, preventing curling or twisting during the subsequent folding and attachment process.
2Reliability
If the wing-shaped flaps are folded and bonded to the undergarment to achieve secure fixation, then the attachment reliability is improved, but the natural fit is worsened due to curling or twisting
Solution Approach 1:
Functional embosses are strategically placed at convex portions of the wing-shaped flap outline, providing localized hardness exactly where needed during folding and bonding. This ensures that the protruding areas maintain their shape and do not curl or twist, enabling reliable attachment while preserving natural fit.
Solution Approach 2:
The embosses are formed in advance on the wing-shaped flap to provide preemptive structural support. This preliminary hardening prevents deformation during the attachment process, ensuring that when the flap is folded and bonded to the undergarment, it maintains its intended shape and provides both secure fixation and natural fit.
Data Source
Figure 1
Figure 2~3
Figure 4(A)~4(B)
AI summary
[Problem to be Solved] To prevent curling of wing-shaped flaps to reduce an unnatural fit. [Solution] At least a part of the outline of a wing-shaped flap W has a wavy or curved line or wavy and curved lines in combination. A plurality of dot embosses 22 are provided on an outer edge along the outline of the wing-shaped flap W. Moreover, functional embosses 23 relatively larger in area than the dot embosses 22 are provided at the positions of convex portions 20 where the outline of the wing-shaped flap protrudes outward. Furthermore, central embosses 24 relatively larger in area than the dot embosses 22 are provided in a region where the dot emboss 22 is not provided, at the center of the wing-shaped flap.