Tape Diaper Wavy Wing Edges Prevent Skin Folding
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Solution Overview
Problem
Conventional tape-type disposable diapers experience issues with the outward bulging sections of the wavy portions folding between the diaper and the skin, leading to aesthetic impairment, leakage, and a deteriorated wearing feeling, especially when the thighs are bent.
Innovation Solution
The design incorporates a tape-type disposable diaper with obliquely extending lower edges on both the ventral and dorsal parts, featuring wavy portions with a side elastic member that creates a flat gather with a specific elongation range and interval, preventing the bulging sections from folding against the skin while maintaining an aesthetically pleasing frill-like appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If wavy portions with outward bulging sections are provided on the lower edges of wing parts, then the aesthetic appearance is improved, but the projecting sections fold between the diaper and skin causing leakage and deteriorated wearing feeling
Solution Approach 1:
The patent applies curvature by forming wavy portions with multiple peaks and valleys on the lower edges of wing parts. The specific configuration with controlled amplitude (3-10mm) and wavelength (10-20mm) creates a frill-like appearance while the rounded peak shapes prevent sharp folding against the skin, thus maintaining both aesthetics and reliability
2Shape
If the amplitude of wavy portions is increased to enhance aesthetic appearance, then the frill effect is improved, but the projecting sections are more likely to fold between the diaper and skin
Solution Approach 1:
The patent precisely controls the geometric parameters of the wavy portions, specifying an amplitude of 3-10mm and wavelength of 10-20mm. These parameter ranges are optimized to create visible frill effects while keeping the peaks rounded and not too prominent, preventing them from folding against the skin during leg movement
3Adaptability or versatility
If the diaper is designed to accommodate a range of body sizes, then the versatility is improved, but the upper front of thighs comes into tight contact with the wing parts when thighs are bent
Solution Approach 1:
The curved, rounded peaks of the wavy portions create a frill-like structure that maintains spacing between the diaper and the wearer's skin. This curvature prevents the wing parts from making tight contact with the upper front of thighs during leg bending, while still accommodating various body sizes through the flexible wavy structure
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 configuration effectively prevents the outward bulging sections from folding against the skin, enhancing the aesthetic appeal and reducing leakage and discomfort, while ensuring a secure fit and improved leg movement compatibility.
Implementation Method 1
a side elastic member is provided on the center side in the width direction from the wing parts in the side flap portion, a flat gather contracted in the front-back direction by the side elastic member is provided
Data Source
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AI summary
To prevent a projecting section that bulges outward in a wavy portion from being folded between the surface of a diaper and the skin. Lower edges (70, 75) of a wing part (WP) have a wavy portion (80) having a plurality of outwardly bulging peaks, a side elastic member (64) is provided on the width direction center side of the wing part (WP) in the side flap portion (SF), and a flat gather that is contracted in the front-back direction (LD) by the side elastic member (64) is provided, an overlapping range (77) is provided where a front-back direction range in which contraction force of the side elastic member (64) acts and at least a part of a front-back direction range of the wavy portion (80) overlap, the maximum elongation of the flat gather is 150 to 350%, the width direction (WD) interval between the side elastic member (64) and the wavy portion (80) in the overlapping range (77) is 15 to 50 mm at the maximum and 5 to 20 mm at the minimum.