Electrolytic Copper Foil Filtration
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Copper is widely used in lithium-ion batteries and printed circuit boards for its conductive properties. As copper is developing into thinner, high ductility foils for use in the electronics industry today, electrolyte purification is increasingly important to improve the quality of copper foil. Feature-Tec has various solutions to reduce operational complexity, element change-out frequency and air pollution reduction.


Copper Contaminants   

Contaminants Sources Impact
 Particulates Oil,
 hydrocarbons, etc
 Feed & pipeline
 Corrosion contamination
 Pitting, holes in copper foil


Time Consuming & Complex Maintenance

Strainers, cartridge & bag filters are commonly used today for electrolyte filtration processes. As manual washing and change-out is required, the complicated process exposes technicians to harmful particles. The problem can be solved by using larger housings with more elements, increasing the process working time to reduce duration of contact with harmful materials.


Feature-Tec Filtration System

Fully Automatic, Simple Maintenance, High Precision

Feature-Tec multi-stage filtration system purifies electrolytes by installing filters before and after heat exchangers. The SelfClear automatic filtration system provides efficient, fully sealed performance compared to manual change-out filter housings, effectively controlling the purity of electrolytes.


Filter Applications

Different filters are used at each stage to remove contaminants, ensuring purity of the end product.


Filter  Micron Rating  Features Applications
 SelfClear  1um
 Fully automatic
 Minimal manual operation 
 High Efficiency
 Fully automatic
 Minimal manual operation
 High Efficiency
 Oil Absorption
 Filter Bag
 Absorbs oil
 High precision
 Effectively filters electrolytes
 Prevents heat exchanger fouling 
 Removes particles & pump oil
 Jumbo Filter
 0.5 - 1um
 Large filtration area
 Long service life
 High precision
 Improves electrolyte purity
 Removes pipeline particles
 Assures copper quality


Feature-Tec provides filtration solutions according to our clients’ work process and required filtration precision. The micron rating of filters can be adjusted, while oil absorption pillows can be added for increased oil absorption from the process.


Surface Treatment


Bath liquids used for treating copper foils should be  filtered to remove contaminants, ensuring high product quality.

As treatment of copper foils requires many complex steps involving circulating washing liquids, the Jumbo filter system extends the service life of the fluids by filtering the fluids before reuse

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