WebIdentify the most important factors affecting first-pass retention and the rate of drainage of water from the fiber mat during paper formation. Identify classes of wet-end chemical additives that can be used to achieve paper property objectives in various grades. Webfirst-pass retention evaluations.The control with no aid is an average of three tests.Figure 2shows the lab-oratory drainage rate results as per-centage improvement over no treat …
Retention and Formation in Papermaking - Sveacon
WebVariations due to retention efficiency can be minimized by such practices as aiming for a higher level of first-pass retention (reducing the fines content of the white water), online control of white-water solids, and online control of cationic demand. ... Hubbe, M. A., “Retention and Hydrodynamic Shear,” Tappi J. 69 (8): 116 (1986). Web80 July 1991 Tappi Journal II. PEI: ExamDle of newsmint mill trial data 1171 Control Trial Concentration of PEI, YO 0 0.04 Machine speed, mlmin 990 990 Output, tonsth 22.8 22.8 Consistency after press section, Ye 42.0 42.6 Steam consumption, tons/ton of paper 1.40 1.31 A 10% increase in first-pass retention was realized. 2. fitness therapy san mateo
THE PERFORMANCE OF ANIONIC POLYACRYLAMIDE AS A …
WebAll drivers who fail to update their medical history or pass the annual physical examination within the established time limits (See Regulation 4140, Physical and Medical … WebAlmost any retention aid is apt to improve the drainage rate as fines and fillers are removed from the white water, which decreases the solids content of the white water; … WebFirst-pass retention (FPR) values are calculated from two consistency measurements: the headbox consistency and the white water consistency where cHB and cWW are the headbox and white water consistency, respectively. ABB KPM KC9 Optical Consistency Transmitters are designed for low consistency applications. fitness therme wien oberlaa