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 | Fiber Potential Analyzer |
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Measurement of the Zeta potential of fiber suspensions
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Determination of the adsorption of additives on fibers
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Surface charges of fibers, fillers, particles or colloidal dissolved matters in stock suspension are defined by the Zeta Potential on their surfaces. The charge of the stock suspension can be split into the colloidal and particle charge, measured with the CAS Charge
Analyzing System, while the fiber and filler charge is measured with the FPA Potential Analyzer. All both charge levels together defining the overall Zeta Potential fiber suspensions.
The knowledge of the fiber charges in the pulp is the key for optimized dosage of chemical aids which should adsorb on the fiber. The mostly negative (anionic) charged fiber adsorbing the positive (cationic) charged additives in the papermaking process. The optimized dosage of such aids always depends on the Zeta Potential within the pulp.
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The FPA is designed to determine the Zeta Potential of fibers according to the Helmholtz-Smoluchowski equation by simultaneously measuring conductivity, pressure and the streaming current potential. The measuring principle is based on the streaming current potential measuring method in a fiber plug. That fiber plug is automatical build up on a screen electrode in the measuring cell of the FPA by (with the help) a vacuum. By periodically changing the vacuum during the measurement the charge clouds absorbed on the fibers are moving with the liquid stream and generating the streaming current potential measured by the screen and ring electrode.
The knowledge of the fiber charge enables a correct and effective dosage of the charged chemical additives. The fiber adsorption of cationic starch, wet strength resin, and many other chemical aids can be easily measured with original samples on-site to optimize the dosage of chemicals in the wet end of the paper manufacturing process.
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technical data:
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Power Supply:
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100-240 VAC, 50/60 Hz, 40 W
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Weight:
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approx 15 kg
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Device dimensions:
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330 x 350 x 245 mm (WxHxD)
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Available screen electrodes:
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30-315 micrometer
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Sample requirements
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Min Sample Volume:
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400-800 ml
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Analytical findings:
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Zeta potential:
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resolution: 0.1 mV
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pH:
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resolution: 0,01 pH
measuring range: pH 0 - 14
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included accessories:
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Measuring cell, beaker, temperature compensated pH probe, PC Software, USB-CF-Card Reader, Power cable, RS232 cable
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features:
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All components (measuring electronics, micro controller, control systems) are at the latest technological standard
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simple handling, robust design, high accuracy and reproducibility
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Portable: only one device, low weight, transportation case with rolls
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Measuring results compatible to comparable devices
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Menu controlled fully automatic measuring procedure
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Automatic removal of the fiber plug after the measurement
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Omission of the big and noisy external vacuum pump
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Vacuum pump water protected: pump cannot be destroyed by filtrate overflow
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Omission of the manual adjustment of pressure control: pressure is controlled automatically by computer
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Integrated pH Measurement
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Simple removal of filtrate for charge analysis/titration
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Controlling of device and processing of data by most modern micro controller
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Automatic, menu controlled cleaning of the system
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Omission of the external connection cable for electrodes - thereby prevention of handling errors
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Storage of data on an internal memory card to export and evaluation by PC
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High performance PC software for data logging, display, evaluation and storage
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Trend display is possible
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Data readout via display and integrated printer
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Here you can download the product folder:
fpaeng.pdf [243 KB]
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