the container was shaken 3 times and the time for the particles to settle to the bottom of the container was measured with a stop watch the shaking three times and settling time was repeated 7 times for each sample with the following results ______________________________________ settling timeaverage particle settling time standard deviationsize microns seconds seconds ______________________________________3300 1 03 0 38450 5 89 2 21300 39 00 16 00250 130 00 21 00 lt 50 particles float ______________________________________ to an 8000 gallon side agitated blend tank 6000 gallons of water was added 62 5 pounds of hercules as4 chopped carbon fiber having on its surface 0 5 polyvinylpyrrolidone sizing is added to the tank and agitation is continued for 10 minutes to form a well dispersed slurry of individual carbon fibers in water next 250 pounds of pfa 340 disk refined fluoropolymer pulp is added to the water in the tank and agitation continued for an additional 15 minutes this slurry stock is 0 62 consistency weight solids weight water u00d7 100 the stock was then fed at the rate of 110 gallons per minute into the recirculating white water loop of the paper machine providing a dilution to about 0 062 consistency at the head box at the head box a sheet was formed having a dry equivalent basis weight of.