Sanitary Napkin Wing Layout for Heavy Bleeding Leakage Control
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Solution Overview
Problem
Sanitary napkins for heavy menstrual bleeding fail to provide adequate length and discretion, leading to increased risk of leakage and discomfort, and insufficient fluid absorption and distribution.
Innovation Solution
A sanitary napkin design with offset fold back wings and embossed channels, ensuring a length ratio of L*(L1/L2) > 29 cm and featuring an hourglass-shaped central channel with disconnected longitudinal channels, enhancing fluid distribution and absorption capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sanitary napkin is made longer to provide adequate coverage for heavy bleeding, then leakage protection is improved, but discretion and user comfort deteriorate
Solution Approach 1:
The napkin is divided into functional zones with different lengths: the absorbent core and channels are concentrated in the rear region (15-25 cm from front edge) while the front region (0-15 cm) has minimal extension. This segmentation allows the napkin to provide adequate coverage where needed while maintaining discretion in visible areas.
Solution Approach 2:
Different regions of the napkin are designed with different properties: the rear region has high absorption capacity with embossed channels and extended length, while the front region has reduced length and simpler structure. This local differentiation optimizes both leakage protection in critical areas and overall discretion.
2Quantity of substance
If the absorbent core capacity is increased to handle heavy bleeding, then absorption capability is improved, but fluid distribution efficiency deteriorates
Solution Approach 1:
Embossed channels are introduced as intermediary structures within the absorbent core to facilitate fluid distribution. These channels act as conduits that guide fluid flow from the surface into the deep absorbent layers, ensuring efficient distribution throughout the high-capacity core material.
Solution Approach 2:
The embossed channels create a three-dimensional fluid distribution network within the absorbent core, transforming fluid flow from simple surface absorption into a multi-directional distribution system that penetrates deep into the core structure, thereby utilizing the full absorbent capacity.
3Reliability
If the fold back wings are positioned to maximize napkin extension, then security and coverage are improved, but discretion and comfort deteriorate
Solution Approach 1:
The fold back wings are positioned asymmetrically at a specific offset from the centerline (1-5 cm) rather than symmetrically at the center. This asymmetric positioning creates an optimal balance point that provides sufficient rear coverage for security while limiting front extension to maintain discretion under clothing.
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
The design provides secure and discreet protection with improved fluid handling, ensuring effective absorption and reduced leakage, as demonstrated by increased absorbent capacity and user satisfaction.
Implementation Method 1
embossed channels to contribute to an efficient absorption and distribution of fluids
Data Source
AI summary
A secure and discreet sanitary napkin (1) having fold back wings (3) positioned along the longitudinal sides (9) of the sanitary napkin (1) so that an overall length ratio corresponds to the equation L*(L1/L2)>29 cm, where L is the total length of the sanitary napkin (1) taken along its longitudinal central axis (y-y), L1 is the distance from the transverse axis (x-x) of the fold back wings (3) to the front edge (6) of the sanitary napkin (1), and L2 is the distance from the transverse axis (x-x) of the sanitary napkin (1) to the rear edge (7) of the sanitary napkin (1).