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20um Polypropylene Separator for lithium ion battery


Generic Brand 20um Polypropylene(PP) separator film for lithium ion battery. Available in 20 and 25um.

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The separator is of key importance in the battery. The properties of the separator determine the interface structure and resistance of battery, directly influencing the capacitance, safety and other properties. High performance separator is very important to improve the comprehensive performance of the lithium battery.

This separator is a reliable generic separator suitable for most applications. For specific requirements or higher end specifications, please take a look at the Celgard range.

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Width

60 mm x 100m, 85 mm x 60m

20um Separator

Term Unit Inspection value
Appearance Ivory-white
Thickness micron 20±2
Gas permeability Sec/100ml 350-550
Porosity % 38-44
Puncturing Strength g >300
Tensile strength MD Mpa >90
Tensile strength TD Mpa >100
Film close temperature ≤135
Film break temperature ≥147
90℃ heat shrink MD % ≤3.5
90℃ heat shrink TD % ≤2
105℃ heat shrink MD % ≤5
105℃ heat shrink TD % ≤3
120℃ heat shrink MD % ≤20
120℃ heat shrink TD % ≤15

25um Separator

Name PP(polypropylene) Separator
Item Unit Type
PP-25
Thickness um 25
Air Permeability sec/100ml 520
Factor of porosity % 42
Tensile Strength MD Kg/cm2 >1200
TD Kg/cm2 >130
Puncture Strength g >450
Thermal contraction (90℃ 1h) MD % ≤2.5
TD % ≤0.5
Thermal contraction

(105℃ 1h)

MD % ≤4
TD % ≤1
Obturator temperature 153