Face Mask Offset Creases Fluid Resistance
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Solution Overview
Problem
Face masks with aligned creases in the body portion are more susceptible to fluid penetration, leading to higher failure rates in fluid resistance tests, as the folding process weakens the mask and allows energy and fluid to be transferred between layers during a splash, increasing the risk of fluid penetration.
Innovation Solution
The face mask design features a body portion with first and second layers that have misaligned creases, preventing direct fluid travel through the creases and enhancing fluid resistance by eliminating a potential weak spot, while also allowing for vertical extension and secure binding to the face.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the body portion is folded simultaneously with all layers, then the manufacturing process is simple, but the creases are nested and aligned which increases fluid penetration susceptibility
Solution Approach 1:
The folding process is segmented into independent steps for each layer. The first layer is folded to form first creases, then the second layer is folded separately to form second creases that are offset from the first creases. This segmentation prevents nested alignment of creases while maintaining manufacturing simplicity.
Solution Approach 2:
The creases in different layers are deliberately made asymmetric relative to each other. The second creases are offset from the first creases, creating an asymmetric pattern that prevents direct alignment. This asymmetric arrangement blocks fluid penetration paths while preserving the simplicity of the folding process.
2Reliability
If thicker materials or additional layers are used to improve fluid resistance, then fluid resistance is improved, but the porosity is reduced and cost increases
Solution Approach 1:
Instead of increasing material thickness or adding more layers in the vertical dimension, the invention uses the horizontal dimension by offsetting creases laterally. The creases in the second layer are positioned offset from the first layer's creases, creating a staggered pattern that blocks fluid penetration without requiring additional material quantity.
Solution Approach 2:
The invention creates a composite structure where multiple layers with offset crease patterns work together to achieve fluid resistance. The first and second layers are combined with their respective crease patterns, forming a composite configuration that provides fluid resistance without increasing overall material porosity or thickness.
3Stability of the object's composition
If the creases are completely nested and aligned, then the layers are tightly configured, but more energy and fluid are transferred between layers during splash
Solution Approach 1:
The invention extracts the nested alignment of creases from the layer configuration. By offsetting the second creases from the first creases, the design removes the harmful nested alignment that enables energy and fluid transfer between layers, while maintaining a stable and tightly configured multilayer structure.
Solution Approach 2:
The offset crease configuration acts as an intermediary barrier between layers. The misaligned creases create a staggered pattern that interferes with direct fluid and energy transfer paths between the first and second layers, effectively mediating against harmful energy transfer while preserving layer stability.
Data Source
AI summary
A face mask for improved fluid resistance is provided. The face mask may include a body portion with a first layer and a second layer. The first and second layers may have a plurality of folds that form a plurality of first creases in the first layer and a plurality of second creases in the second layer. The body portion may have an outer facing surface and an inner facing surface opposite from the outer facing surface. At least one of the first creases may be misaligned with at least one of the second creases in order to provide improved fluid resistance of the body portion.