Disposable Diaper Top-Sheet Moisturizer Pattern for NIR Detection
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Solution Overview
Problem
Disposable diapers cause skin irritation, particularly diaper rash, due to friction and stimulation from body fluids and excreta, with loose stool absorption being a significant issue, and there is a need to confirm the presence of skin care agents like moisturizing agents during manufacturing.
Innovation Solution
A disposable diaper design with a top sheet coated with a moisturizing agent containing glycerin, featuring high and low concentration application regions visible from the use surface, and confirmed using a near-infrared camera to ensure proper application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a moisturizing agent is applied to the top sheet to reduce skin irritation, then skin care function is improved, but it becomes difficult to confirm whether the agent is properly disposed in the manufacturing process
Solution Approach 1:
The patent applies a near-infrared reflective substance to specific regions (peripheral portions in front-back direction and/or width direction) of the top sheet. This substance reflects near-infrared light differently than other portions, creating visible contrast when imaged with a near-infrared camera. This allows automated detection and confirmation of the moisturizing agent's presence and proper disposal during manufacturing, while maintaining the skin care function of reducing irritation through the moisturizing agent.
2Speed
If the top sheet quickly absorbs loose stool to prevent skin stimulation, then absorption speed is improved, but the top sheet becomes clogged and absorption is hindered
Solution Approach 1:
The patent applies the moisturizing agent with different concentrations to different regions of the top sheet. High concentration application regions are disposed in peripheral portions in the front-back direction and/or width direction, while a low concentration application region is disposed in an intermediate region between the high concentration application regions. This local quality differentiation allows the peripheral regions to provide enhanced skin care and absorption initiation, while the intermediate region maintains balanced absorption properties without excessive clogging.
Data Source
AI summary
A disposable diaper includes: a top sheet constituting a use-side surface; a liquid impervious sheet disposed on a back surface side; and an absorbent element interposed therebetween. A moisturizing agent mainly containing glycerin is applied to the top sheet, an application region of the moisturizing agent is an exposed region that can be at least visually recognized directly from a use surface side in an unfolded state of the product, and the exposed region has high concentration application regions Q of the moisturizing agent in at least one of peripheral portions in a front-back direction and peripheral portions in a width direction, and a low concentration application region MZ of the moisturizing agent in an intermediate region between the high concentration application regions.