Darak®

DARAK is a microporous duroplastic separator. Due to its high temperature stability, low electrical resistance and very low acid displacement, DARAK separators are suited for batteries with gelled electrolyte or in conventional flooded high performance batteries.

Features:

  • Used in gelled electrolyte & flooded lead acid batteries
  • Proven reliability in over 30 years of commercial use
  • Ease of handling (manual or fully automated)
  • Available in various profile designs and dimensions
  • High porosity and small average pore size (microporous)
  • Low acid displacement and electrical resistance
  • Low level of trace elements
  • Separator is stable against additives, such as phosphoric acid
  • Resistant to cracking under mechanical forces

Benefits:

  • High oxidation resistance ensures long battery
  • PVC-free (does not release chlorides to the electrolyte, no issues with recycling, no potential corrosion issues)
  • Rapid separator wet-out with electrolyte
  • Mechanically stable under pressure and temperature
  • Not susceptible to corner breaks

Features:

  • Used in gelled electrolyte & flooded lead acid batteries
  • Proven reliability in over 30 years of commercial use
  • Ease of handling (manual or fully automated)
  • Available in various profile designs and dimensions
  • High porosity and small average pore size (microporous)
  • Low acid displacement and electrical resistance
  • Low level of trace elements
  • Separator is stable against additives, such as phosphoric acid
  • Resistant to cracking under mechanical forces

Benefits:

  • High oxidation resistance ensures long battery
  • PVC-free (does not release chlorides to the electrolyte, no issues with recycling, no potential corrosion issues)
  • Rapid separator wet-out with electrolyte
  • Mechanically stable under pressure and temperature
  • Not susceptible to corner breaks
Attributes Units DARAK 2003 DARAK 2000 DARAK 5005 DARAK 5000
Backweb Thickness mm 0.350 0.400 0.500 0.600
Porosity % 70 70 70 70
Electrical Resistance Ω-cm2
0.08 0.09 0.10 0.11
Acid Displacement ml/m2 140 160 220 240
Wettability sec 3 3 4 5

*Typical values; depends on profile thickness