Disposable Diaper Alignment Marks for Fixing Zone Positioning
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Solution Overview
Problem
Conventional pad-type disposable diapers often fail to be properly aligned and fixed to underwear, leading to slanted positioning of second fixing zones, which can cause leakage and discomfort due to the lack of clear visual cues for accurate alignment.
Innovation Solution
The pad-type disposable diaper features a crotch section with a first fixing zone and second fixing zones, each with a pressure-sensitive adhesive layer, and includes visible marks on the front and back end portions that stick out of the underwear's waist opening edge, allowing for easy visual alignment and repositioning to ensure bilateral symmetry, facilitating proper fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the second fixing zones are fixed to the underwear without visual alignment aids, then the fixing process is simple, but the second fixing zones become slanted with respect to the center line of the underwear
Solution Approach 1:
The patent applies visual marking by providing a pair of right and left marks (41, 42) on the front and back end portions of the diaper. These marks are visually observable and arranged in bilateral symmetry, enabling the user to align the second fixing zones properly with the underwear by observing the symmetry of the marks, thereby preventing slanted positioning.
2Loss of information
If the diaper is fixed without marking aids, then the diaper structure remains simple, but the wearer cannot be aware of the slant of the second fixing zones
Solution Approach 1:
The patent provides visually observable marks (41, 42) on the diaper that enable the wearer to detect whether the diaper is properly aligned. The marks are arranged in bilateral symmetry, and when the diaper is correctly positioned, the marks appear symmetric with respect to the center line of the underwear, providing visual feedback on proper alignment.
3Reliability
If the second fixing zones are fixed without repositioning capability, then the fixing process is quick, but leakage and discomfort occur due to slanted positioning
Solution Approach 1:
The patent incorporates marks (41, 42) that allow the user to check and adjust the positioning of the second fixing zones before final adhesion. The user can peel off the second fixing zones, reposition them to achieve proper alignment as indicated by the symmetric marks, and then re-adhere them, ensuring correct positioning before the adhesive sets.
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 enables easy and accurate positioning of the second fixing zones, preventing slanting and associated issues like leakage and discomfort, thereby improving the wearing experience.
Implementation Method 1
a pressure-sensitive adhesive layer provided on under faces of the first fixing zone and the second fixing zones
Data Source
AI summary
The pad-type disposable diaper allows, with the diaper attached to underwear, easy checking for appropriate positioning. The diaper has a pressure-sensitive adhesive layer on the under faces of a first fixing zone located in the crotch section and the second fixing zones located forward and backward of the first fixing zone, and is to be fixed to the underwear with at least one of the front and back end portions thereof sticking out of the waist opening of the underwear. The at least one of the front and back end portions is provided with right and left marks indicative of the front-back positions so as to be visually observable from the underside of the diaper, and the marks are spaced apart from each other in the width direction and arranged in symmetry with respect to the center line passing the center of the width of the diaper.