Current lithium ion battery separator technology is based on stretched films, made in general from either polypropylene or from ultra high molecular weight polyethylene, or both. The processing of these films is extraordinarily difficult, and it is a testament to the technical prowess of our competition that they have been able to achieve the consistency and properties needed to make lithium ion batteries.
The difficulty of their processes have heretofore been a huge barrier to entry preventing other companies from entering the lithium ion battery separator market, and so an oligopoly exists with only a few dominant suppliers.
With the advent of Dreamweaver's patent pending nanofiber technology, this has all changed. The combination of nanofibers and microfibers and the flexibility afforded by this technology to vary and control the pore size and the pore size distribution is unprecidented in this marketplace. Now, for the first time, a battery separator can be designed specifically for a target application. Need more current? We can make a separator for that. How about a longer lifetime? We can make a separator for that. Faster recharge? That one, too.
Stretched film technology will likely always have a place in this demanding marketplace. But for everything that can't be done with films, there is the Dreamweaver nanofiber technology!