Task: Translation
Input (Czech): Separ tor je sestaven z hmoty vz jemn  propleten²ch vl ken, z nich v podstat  vÜechna maj  pr m r vl kna ne v tÜ  ne  p°ibli n  20 .mi.m, a z nich  alespo  5 procent hmotnostn ch m  pr m r vl kna menÜ  ne  1 .mi.m. V t chto skeln²ch vl knech je rozlo eno od 0,2 procent hmotnostn ch do 20 procent hmotnostn ch celul zov²ch vl ken z kaÜe maj c  kanadsk² stupe  mlet  dostate n  n zk². Akumul tor vyroben² s t mto separ torem m   ivotnost p°i cyklick m pou  v n  alespo  o 10 procent v tÜ  ne  akumul tor vyroben² s jinak shodn²m separ torem, ve kter m skeln  vl kna maj c  pr m rn² pr m r v tÜ  ne  1 .mi.m nahrazuj  celul zov  vl kna.\
Output (English): A glass fiber separator material is disclosed. The separator is composed of a mass of intermeshed glass fibers substantially all of which have a fiber diameter not greater than about 20 micrometers, and at least 5 percent by weight of which have a fiber diameter less than 1 micrometer, distributed through the glass fibers, and from 0.2 percent b weight to 20 percent by weight of cellulose fibrils. The fibrils are from a slurry having a Canadian freeness sufficiently low that a battery made with the separator has a service life, when cycled, at least 10 percent greater than an otherwise identical separator where glass fibers having an average diameter greater than 1 micrometer replace the cellulose fibrils.