美國celgard隔膜 Trilayer PP/PE/PP Celgard's proprietary trilayer technology is a key feature which differentiates Celgard? battery separators from those manufactured by other battery separator suppliers. This unique process capability allows Celgard to combine the inherent benefits of polypropylene (PP) and polyethylene (PE) membranes into a single flat-sheet lithium battery separator. Features of Celgard? PP/PE/PP Trilayer Separators: Produced using a dry-stretch manufacturing process Excellent resistance to acids, bases, and most chemicals Uniform pore structure with high chemical and thermal stability Zero TD shrinkage for reduced internal shorting and improved high temperature dimensional stability PP outer layers that provide oxidation resistance for excellent cycling & trickle charge performance PE inner layer that provides high-speed shutdown capability Celgard? Commercial Trilayer PP/PE/PP Separators: Product Thickness JIS Gurley Porosity TD Shrinkage 2325 25 μm 620 seconds Medium 0% 2320 20 μm 530 seconds Medium 0% C210 16 μm 460 seconds Medium 0% M825 16 μm 460 seconds Medium 0% M1473 14 μm 425 seconds Medium 0% M824 12 μm 425 seconds Medium 0%