Composite membrane and method for producing same
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing acoustic components face challenges in protecting sensitive electronic components from harmful liquids, nanoscale dust, and environmental factors without compromising sound quality, as conventional membranes are either impermeable to air or contain harmful substances.
Innovation Solution
A composite with an electro-spinning membrane formed from superimposed nanofibers or microfibers, creating a three-dimensional network with defined pore structure for high porosity and air permeability, while maintaining water resistance and being free from halogens and harmful compounds, combined with a plasma coating for enhanced oil, grease, and water-repellent properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional membranes are used to protect electronic components, then protection against liquids is improved, but air permeability deteriorates
Solution Approach 1:
The patent employs a microporous membrane with specifically engineered pore structures that allow air molecules to pass through while blocking liquid penetration. The membrane features a hydrophobic pore surface that repels liquid while maintaining open pores for gas transmission, achieving both protection and breathability simultaneously
Solution Approach 2:
The invention uses composite membrane structures combining different materials with complementary properties - a hydrophobic barrier layer for liquid rejection and a porous support layer for mechanical strength and air permeability. This multi-material approach resolves the contradiction between liquid protection and gas transmission
2Quantity of substance
If electrospinning membrane with high porosity is used, then air permeability is improved, but protection against liquids deteriorates
Solution Approach 1:
The patent applies different properties to different regions of the membrane - the pore walls are treated with hydrophobic coatings while the overall structure maintains high porosity. This local differentiation allows the membrane to be permeable to air while resisting liquid penetration at the pore level
Solution Approach 2:
The invention controls the pore size distribution and hydrophobicity parameters of the membrane to achieve optimal performance. By adjusting pore diameter, porosity, and surface energy parameters, the membrane simultaneously achieves high air permeability and effective liquid barrier properties
3Object-affected harmful factors
If plasma coating is applied to enhance water resistance, then protection against moisture is improved, but manufacturing complexity deteriorates
Solution Approach 1:
The patent incorporates hydrophobic properties directly into the membrane fabrication process through electrospinning parameter control and material selection, rather than requiring subsequent plasma coating steps. This preliminary integration of water resistance reduces manufacturing complexity while maintaining protection performance
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 composite provides effective protection against moisture, sweat, grease, and dust while allowing air permeability, meeting strict protection standards and ensuring the sound quality of acoustic components, with a water column pressure of up to 35 m and air permeability of up to 50 L/m²*s, and is free from harmful substances like PFOA.
Implementation Method 1
a membrane is formed on the carrier layer using an electro-spinning process
Implementation Method 2
The membrane is coated with a coating applied by a plasma coating process
Data Source
Figure 1~4
Figure 5
AI summary
The invention relates to a composite membrane with at least one carrier layer and an electro-spinning membrane which is arranged on the at least one carrier layer, the electro-spinning membrane being formed from fibers lying one on top of the other, forming a pore structure. The pore structure of the composite is designed in such a way that the composite has a water column of at least 1 m and an air permeability of at least 5 L/m2*s. The invention also relates to a method for producing a composite membrane, in which a carrier layer is provided and a membrane is formed on the carrier layer using the electro-spinning process, the membrane being produced from fibers lying on top of one another and having a pore structure.