PP Battery Separator Roll by Dry Method (800 m L × 65 mm W × 25 um T) can be used as an excellent Li ion battery separator. 

Specifications

• Material: Polypropylene (PP)
• Thickness: 25 ± 2 um
• Width : 65 mm (suitable for 21700 cylindrical cell)
• Air Permeability: 350±100 s/100ml
• Porosity: 42 ± 3 %
• Area Density: 13.2±1.0 g/m2
• Puncture Strength : ≥450 G
• Tensile Strength: ≥ 1400 Kgf/cm2 (MD); ≥ 1300 Kgf/cm2 (TD)
• Thermal Shrinkage: ≤1.5% (MD); ≤0.5% (TD). Drying at 90℃ for 2 h. 
• Sold in roll only