Secondary Battery Separator Film

Secondary Battery Separator Film

The separation membrane is one of the core materials constituting the secondary battery together with the cathode material, 
the anode material, and the electrolyte, 
and it plays a role of preventing the electrical short-circuit due to the 
physical contact between the anode and the cathode, 
it acts as a free pathway. 

Product Features

- Material: Polypropylene 
- Production method: Dry type 

Product Usage

- Battery membrane for electric vehicles 

Product Specification

Properties
Specified Value
Measurement Method
(μm) Thickness
16 ~ 50
Thickness Gauge
(%) Porosity
40 ~ 70
by Calculation
(sec/100ml) Air permeability
50 ~ 300
Gurley Densometer
(kgf/cm2) Tensile strength
MD
1000↑
Tensile Tester
TD
200↑
(%) Tensile rate
MD
120↓
TD
(gf) Puncture Strength
300↑
2mm / sec, Ø1.0mm Dia.
(%) Heat contraction rate
MD
15↓
150°C / 1hr
TD
Shut-down Temperature
163↓
BFI Method

COMPANY: BFI INC. / CEO: Kim yun il  
Address Sujeong-ro, Jangan-myeon, Hwaseong-si, Gyeonggi-do, Korea
Email: bfi354@hanmail.net  / TEL: 031-354-6037

ⓒ 2020 B.F.I.

1st Factory  
Head Office / 1st Factory 224-19 Sujeong-ro, Jangan-myeon, Hwaseong-si, 
Gyeonggi-do, Korea
2nd Factory  
2nd Factory 224-22 Sujeong-ro, Jangan-myeon, Hwaseong-si, Gyeonggi-do, Korea