Connect with UPEX
Your trusted partner in membrane innovation.
Unique biaxial
stretched PP & PE
The only company in the world
(successfully mass-produced biaxially-stretched polypropylene(PP) membranes)
Separator (Secondary Battery)
Implementation of low resistance to enhance the rapid charging of lithium secondary batteries, despite adopting an eco-friendly separator manufacturing method.
High-Efficiency Separator for Fast Charging.
Secondary Battery
Secondary Battery
Separator
Role
- Maintains the isolation function between the cathode/anode even in abnormal conditions to prevent internal short circuits.
- Provides a smooth passage for lithium ion movement between the cathode/anode during charging and discharging.
Composition
- Base Film (Substrate)
- A porous membrane responsible for mechanical strength.
- Porous biaxially-stretched PE → New eco-friendly low-resistance developed product
- Coating
- Introduction of safety-enhancing inorganic particles to strengthen heat resistance characteristics.
- Introduction of an adhesive layer for the assembly process and long lifespan.
Differentiation Strategy
Excellent Mechanical Properties
- Uniform pore structure
- High porosity (~65%), high air permeability
- Crystal formation through the "Flow-induced crystallization" method to secure the recovery modulus and prevent film rupture of PP film
High Energy Density, Fast Charge/Discharge
- Thin film possible (7-12 ㎛)
- Electronic Resistance (ER) decreases by 50% or less
- Ion conductivity increases by 100% or more
Eco-friendly
- Dry process (no solvent extraction)
- No use of harmful substances (Methylene Chloride / MC-Free)
- Reduced energy and carbon emissions