Process for enhanced deposition and retention of particulate filler on papermaking fibers

  • US 5,679,220 A
  • Filed: 01/19/1995
  • Issued: 10/21/1997
  • Est. Priority Date: 01/19/1995
  • Status: Expired due to Term
First Claim
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1. A method for the deposition of particulate filler on papermaking fibers comprising the steps of,in separate vessels,preparing a first slurry of papermaking fibers,preparing a second slurry of calcium hydroxide or the equivalent thereof,and thereafter,combining said first and second slurries with a gaseous precipitant in a flowing stream, under conditions whereby shear is imparted to said gaseous precipitant,to form in situ calcium carbonate on at least the external surfaces of the fibers.

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