Fluorine Resin Membrane Structure for Waterproof Air Venting
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Solution Overview
Problem
Existing waterproof membranes for electronic devices face a trade-off between enhancing waterproof performance and maintaining air permeability, with existing technologies not adequately addressing the needs of devices exposed to water or high water pressure.
Innovation Solution
A fluorine resin membrane with a network structure comprising string-shaped bodies of specific diameters and configurations, optimized to enhance waterproof performance while minimizing the sacrifice of air permeability, including a region with controlled numbers and arrangements of string-shaped bodies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the waterproof performance is enhanced by using conventional waterproof membranes, then the waterproof performance is improved, but the air permeability is sacrificed
Solution Approach 1:
The patent employs a porous fluorine resin membrane with a specific network structure comprising string-shaped bodies. The porous structure allows air molecules to pass through while the configuration and size of the pores (with string-shaped bodies having diameters of 200-750 nm) create capillary pressure that prevents water penetration, thus achieving both high air permeability and waterproof performance simultaneously
Solution Approach 2:
The patent optimizes specific parameters of the membrane structure, including the diameter of string-shaped bodies (200-750 nm), the number of string-shaped bodies per unit area (1-5 in an 8.3 μm×6.2 μm region), and the Gurley air permeability (5 seconds/100 mL/μm or less). By precisely controlling these parameters, the membrane achieves a balance between waterproof performance (limit water entry pressure ≥1.6 MPa) and air permeability
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 fluorine resin membrane achieves improved waterproof performance with minimal impact on air permeability, suitable for devices requiring high water resistance and air exchange, such as during water sports or diving.
Implementation Method 1
the network structure includes first string-shaped bodies of the fluorine resin, the first string-shaped bodies have a diameter of 200 nm or more and 750 nm or less when viewed in a direction perpendicular to a principal surface of the fluorine resin membrane
Data Source
AI summary
A membrane is a fluorine resin membrane having a network structure of a fluorine resin. The network structure includes first string-shaped bodies of the fluorine resin. The first string-shaped bodies have a diameter of 200 nm or more and 750 nm or less when viewed in a direction perpendicular to a principal surface of the fluorine resin membrane. When viewed in the direction, the fluorine resin membrane has, on at least one surface thereof, a region A that has a shape of a rectangle having a size of 8.3 μm×6.2 μm and in which a number of the first string-shaped bodies extending from one long side to another long side of the rectangle is 1 or more and 5 or less. This membrane can be used in a waterproof membrane, and is suitable for enhancing waterproof performance while minimizing a sacrifice of air permeation performance.