battery separator suppliers

Polypropylene/PP separator film for lithium ion battery SPECIFICATIONS Length:400m,  width:50mm, Thicness:20umMode:TOB-PP-20 Name  PP Separator paper Item Unit   Type TOB-PP-20 Thickness um 20 Air Permeability sec/100ml 420 Factor of porosity % 40  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   PACKAGE  Email : tob.amy@tobmachine.com  Skype : amywangbest86  Whatsapp/Phone number : +86 181 2071 5609