First pass retention tappi
WebMeasurement of the first-pass retention of white ledger stock First-pass retention was measured in terms of TAPPI T261 cm-10 (2010). The white ledger stock was diluted to … WebWithout use of the retention aid,the first-pass retention of all solids com- ponents decreased to 26%.The efflu- ent concentration of the saveall increased from 100 ppm to 300 ppm. Estimated overall retention of PCC was less than 60%.The remain- ing 40% PCC was lost in the sewage. The expected economic benefits did not result. Paper properties
First pass retention tappi
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WebAug 2, 2013 · First-pass retention gives a practical indication of the efficiency by which fine materials are retained in a web of paper as it is being formed. First-pass retention … WebMar 1, 2007 · first-pass retention, sizing, and other produc-tion goals. (24-25) ... for the feed water of retention aids,” Proc. Tappi. Papermakers Conf., T APPI Press, Atlanta, 2, 775-784 (2002).
WebOct 15, 2024 · First pass retention is defined by 100% × (HB-WW) / HB where HB is the filterable solids content at a given time in the headbox and WW is the filterable solids in the white water or “tray water” that flows through the forming fabric (WW is sometimes a combination of tray and press section filterable solids). http://www.papergrease.com/glossary/first-pass-retention/
WebChapter 7 - Control and optimization of retention 7-1 Retention of fine particles during paper forming 7-1-1 Whitewater 7-1-2 Calculating first pass retention 7-2 Factors impacting retention 7-3 Brief Overview of retention chemicals and their effects 7-3-1 Charge neutralization 7-3-2 Patching 7-3-3 Bridging 7-3-4 Complex and network flocculation WebFirst-pass retention was measured in terms of TAPPI T261 cm-10 (2010). The white ledger stock was diluted to 0.5% using tap water. Next, the C-PAMs were diluted to a concentration of 0.1% with distilled water. ... (TAPPI T244 cm-99 1999) of the handsheets were measured. PEER-REVIEWED ARTICLE bioresources.com
WebFirst pass retention of paper stuff is a primary indicator for reservation situation of fibre and other solid content on the forming fabric in estimating paper manufacture wet …
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. chips imcdbWeb80 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. graphene analogoushttp://www.papergrease.com/glossary/first-pass-retention/ chip sim cardWebThe first pass filler retention target was 50%. Refined eucalyptus pulp was blended with cationic starch and mixed for 2 minutes. Calcium carbonate was added and mixed for 30 seconds at a 1.0% consistency. The stock was diluted in the handsheet machine to a consistency of 0.6%. chips imdb season 3WebOct 1, 2024 · First pass retention is of ext reme importance to the papermaker because it influences paper machine runnability, material loss levels, an d chemical use effici encies. chips im backofen knusprigWebAlmost 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; … chip sim cell phoneWeb1. The stock (1-10 g/kg solids, 6 to 18 mm layer thickness) gets on the wire. 2. Drainage is assisted by foils (upto ~ 20 g/kg) and then by suction boxes. 3. The formed web leaves the "couch" at 100-200 g/kg solids. Banks of foils formed web polyester woven felt suction boxes (1) (2) (3) Papermaking www.sveacon.se Formation Viewed as Filtration chips imagen