• us5098520a papermaking process with improved

    US5098520A Papermaking process with improved

    A papermaking process includes the steps of adding to the papermaking celllulosic slurry first a high molecular weight cationic polymer and then a medium weight anionic polymer. The cationic polymer is added after the addition of filler, but before at least one of the shear stages to which the slurry is subjected prior to sheet formation and drainage.

  • us5185062a papermaking process with improved

    US5185062A Papermaking process with improved

    A papermaking process includes the steps of adding to the papermaking cellulosic slurry first a high molecular weight cationic polymer and then a medium molecular weight anionic polymer, to improve drainage and retention. The anionic polymer includes ionizable sulfonate.

  • au656541b2 papermaking process with improved

    AU656541B2 Papermaking process with improved

    AU656541B2 Papermaking process with improved retention and drainage Google Patents Papermaking process with improved retention and drainage Download PDF Info Publication number AU656541B2. AU656541B2 AU88319/91A AU8831991A AU656541B2 AU 656541 B2

  • jph04245998a papermaking process with improved

    JPH04245998A Papermaking process with improved

    PURPOSE: To improve both the retention and the drainage in papermaking and facilitate the feed of an additive therefor to a paper machine. CONSTITUTION: This method for papermaking includes steps of initially adding a high-molecular weight cationic polymer to a papermaking cellulosic slurry and then adding a medium molecular weight anionic polymer thereto.

  • papermaking process with improved retention

    Papermaking process with improved retention

    1992-03-24· It is at least theoretically believed that as the retention mechanisms of a given papermaking process shift from filtration to adsorption, the deleterious effect on formation, as high retention levels are achieved, will diminish, and a good combination of high retention with good formation is attributed to the use of bentonite in U.S. Pat. No

  • papermaking process with improved retention and drainage

    Papermaking process with improved retention and drainage

    Papermaking process with improved retention and drainage Abstract. A papermaking process includes the steps of adding to the papermaking celllulosic slurry first a high molecular weight cationic polymer and then a medium weight anionic polymer. The cationic polymer is added after the addition of filler, but before at least one of the shear

  • us5266164a papermaking process with improved

    US5266164A Papermaking process with improved

    The invention provides a method for improving the retention of mineral fillers and cellulose fibers on a cellulosic fiber sheet. The method comprising the steps of preparing a cellulose pulp slurry; adding before a shearing step an effective amount of a copolymer flocculant to the cellulose pulp slurry, the copolymer flocculant is a high molecular weight cationic copolymer of acrylamide and

  • papermaking process with improved retention

    Papermaking process with improved retention

    1993-02-09· Papermaking process with improved retention and drainage . United States Patent 5185062 . Abstract: A papermaking process includes the steps of adding to the papermaking cellulosic slurry first a high molecular weight cationic polymer and then a medium molecular weight anionic polymer, to improve drainage and retention. The anionic polymer includes ionizable sulfonate.

  • flocculation, retention and drainage in papermaking: a

    Flocculation, Retention and Drainage in Papermaking: A

    Flocculation, Retention and Drainage in Papermaking: A Comparative Study of Polymeric Additives Article in The Canadian Journal of Chemical Engineering 85(2):240 248 · April 2007 with 560 Reads

  • retention, drainage and formation aids for paper

    Retention, Drainage And Formation Aids For Paper

    Aries offers a comprehensive line of retention, drainage and formation aids for paper making to help papermakers balance wet end performance. We help businesses keep costs under control, eliminates waste, improve the quality of the paper and reduce environmental impact.

  • correlating retention and drainage in papermaking

    CORRELATING RETENTION AND DRAINAGE IN PAPERMAKING

    that it is possible to correlate the flocculation process evaluated by LDS with the flocculant’s performance in the drainage test. Introduction In papermaking, chemical flocculation is fundamental for achieving high retention and high drainage rate simultaneously (1, 2, 3). The flocculation

  • how retention and drainage chemicals impact

    How Retention and Drainage Chemicals Impact

    But, the letters are used to describe two other important terms called “Retention” and “Drainage”. These words describe a lot about the operation quality, performance, and profitability of running papermaking machines. Retention and drainage chemicals are used in the process of optimizing fiber retention as well as water drainage. This

  • papermaking process with improved drainage

    Papermaking process with improved drainage

    1993-11-30· The invention provides a method for improving the retention of mineral fillers and cellulose fibers on a cellulosic fiber sheet. The method comprising the steps of preparing a cellulose pulp slurry; adding before a shearing step an effective amount of a copolymer flocculant to the cellulose pulp slurry, the copolymer flocculant is a high molecular weight cationic copolymer of acrylamide and

  • papermaking process with improved drainage

    Papermaking process with improved drainage

    Papermaking process with improved drainage and retention Nov 13, 1992 Nalco Chemical Company The invention provides a method for improving the retention of mineral fillers and cellulose fibers on a cellulosic fiber sheet.

  • use of new branched cationic polyacrylamides to

    Use of New Branched Cationic Polyacrylamides to

    Cationic polyacrylamides of very high molecular weight and with different charge densities and degrees of branching have been investigated as retention aids for papermaking. The effects of polymer charge density and polymer branching on drainage and retention of a suspension containing fibers and precipitated calcium carbonate have been correlated with flocs properties.

  • use of new branched polyacrylamides to improve

    Use of new branched polyacrylamides to improve

    These findings indicate that the use of highly branched CPAMs with very high molecular weight is very promising as a retention aid method to improve the papermaking process. Read more Article

  • papermaking process nalco chemical company

    Papermaking process Nalco Chemical Company

    1997-01-21· A papermaking process comprising forming an aqueous cellulosic papermaking slurry and adding a cationic polymer and an anionic polymer to the slurry to increase retention and/or drainage is disclosed. The anionic polymer comprises a formaldehyde condensate of a naphthalene sulfonic acid salt (NSF) with a molecular weight range of 500 to 120,000

  • papermaking process with improved retention

    Papermaking process with improved retention

    A papermaking process includes the steps of adding to the papermaking cellulosic slurry first a high molecular weight cationic polymer and then a medium molecular weight anionic polymer, to improve drainage and retention. The anionic polymer includes ionizable sulfonate.

  • method for improving retention and drainage

    Method for improving retention and drainage

    before the sheet forming process to make the papermaking process less costly or more rapid, or to attain specific properties in the final paper product. The paper industry continuously strives to improve paper quality, increase process speeds, and reduce manufacturing costs. The dewatering, or drainage,

  • how retention and drainage chemicals impact

    How Retention and Drainage Chemicals Impact

    The R and D department in the paper mill is nothing to do with manufacturing process. But, after doing through research, the paper making process takes place which is called Retention and Drainage

  • papermaking an overview sciencedirect topics

    Papermaking an overview ScienceDirect Topics

    Enzymatic modification of papermaking properties of chemical, mechanical, and recycled pulps has been widely studied during the past decades. The main aims have been to improve the strength properties of fibers through increased fibrillation or to affect the amount of fines in pulp to increase the drainage or water retention of pulp. Directed

  • use of new branched cationic polyacrylamides to

    Use of New Branched Cationic Polyacrylamides to

    Use of New Branched Cationic Polyacrylamides to Improve Retention and Drainage in Papermaking Article in Industrial & Engineering Chemistry Research 47(23) ·

  • (pdf) correlating retention and drainage in papermaking

    (PDF) Correlating retention and drainage in papermaking

    Correlating retention and drainage in papermaking with flocculation: Effect of polyelectrolyte branching. Article (PDF Available) · November 2008 with 640 Reads How we measure 'reads' A 'read' is

  • modern papermaking feb 2018 pdf slideshare

    Modern papermaking feb 2018 pdf SlideShare

    2018-02-12· Modern papermaking feb 2018 pdf flash mixing of chemicals with correct order and late addition after pressure screens can save chemicals as well as improve formation, retention and drainage. 30 31.

  • papermaking process using multi-polymer retention

    Papermaking process using multi-polymer retention

    1997-08-20· It is at least theoretically believed that as the retention mechanisms of a given papermaking process shift from filtration to adsorption, the deleterious effect on formation, as high retention levels are achieved, will diminish, and a good combination of high retention with good formation is attributed to the use of bentonite in U. S. Patent

  • use of new branched cationic polyacrylamides to improve

    Use of New Branched Cationic Polyacrylamides to Improve

    9370 Ind. Eng. Chem. Res. 2008, 47, 9370–9375 Use of New Branched Cationic Polyacrylamides to Improve Retention and Drainage in Papermaking Elisabete Antunes,† Fernando A. P. Garcia,‡ Paulo Ferreira,† Angeles Blanco,§ Carlos Negro,§ and M. Grac¸a Rasteiro*,† Research Centre for Chemical Processes Engineering and Forest Products, Chemical Engineering Department, Coimbra UniVersity

  • papermaking science and technology book series

    Papermaking Science and Technology Book Series

    TAPPI currently partners with the Forest Products Engineers based in Finland.As part of our partnership, we offer the Papermaking Science and Technology book series featuring 20 volumes that cover the entire paper manufacturing process from wood raw material to end product.

  • new microparticulate system to improve retention

    New microparticulate system to improve retention

    Request PDF New microparticulate system to improve retention and drainage performances The papermaking process uses a wide variety of additives to improve wet-end drainage and fines retention.

  • retention aid pulp paper mill

    Retention Aid pulp paper mill

    2012-11-14· The best retention of fine particles and colloids in the papermaking process normally occurs when the zeta potential is near to zero and retention aid doing that. The main functions of retention aid are following:-Accelerate drainage, hence increased machine speed; Improved retention of fines and fillers; Reduced wet-end additives and sizing usage

  • retention and drainage aid in papermaking balaji

    Retention and Drainage Aid in Papermaking Balaji

    Need for Retention and Drainage Agents in Paper making Process. In the filtration process during paper making, the paper machine wire cloth is used as a continuous filter that filters the solids from the ready pulp solution, but some fine particles drain out with the water and create so many troubles in the paper formation process. In the

  • the retention and drainage behavior of cross-linked

    The retention and drainage behavior of cross-linked

    "The retention and drainage behavior of cross-linked gelatin with glutaraldehyde in a papermaking system," BioRes. 11(3), 6162-6173. Abstract A type of novel retention aid, cross-linked gelatin, was prepared using low-grade industrial gelatin as the raw material

  • retention and drainage chemical suppliers

    Retention and Drainage Chemical Suppliers

    The R and D department in the paper mill is nothing to do with manufacturing process. But, after doing through research, the paper making process takes place which is called retention and Drainage.. The R-word called retention aid can impact the papermaking efficiency in three ways-One of these ways is by cutting down on solids losses, an issue that also depends on save-all performance.

  • papermaking support solenis

    PAPERMAKING SUPPORT Solenis

    papermaking productivity and product quality. Retention and Drainage A thorough understanding of pulp, wet end chemistry, additives, and operating conditions allows optimization of balanced retention and drainage/dewatering performance leading to improved paper and board machine productivity, efficiency, and quality.

  • papermaking process additives wet end chemistry

    Papermaking Process Additives Wet End Chemistry

    Differentiate between the two classes of papermaking additives; Describe the composition of "anionic trash" Describe the purpose and function of common paper and board machine process additives, including pH control chemicals, charge neutralizers, retention and drainage aids, pitch control additives, biocides, and foam control additives

  • retention, drainage & clarification technology

    RETENTION, DRAINAGE & CLARIFICATION TECHNOLOGY

    Case in point: Chemical additives that are part of retention programs provide benefits to the overall machine process but can also impact formation. Retention and drainage must be balanced with formation to achieve the desired sheet quality at an effective production cost. Retention, drainage and clarification programs from Solenis

  • papermaking dispersant polyacrylamide pam, cationic

    Papermaking Dispersant Polyacrylamide PAM, Cationic

    Papermaking Dispersant Polyacrylamide PAM, Cationic Retention Drainage Poly Acrylamide CPAM for Pape(id:5488212), View quality polyacrylamide, PAM, cationic details from Shandong Nuoer Biological Technology Co.,Ltd storefront on EC21. Buy best Papermaking Dispersant Polyacrylamide PAM, Cationic Retention Drainage Poly Acrylamide CPAM for Pape with escrow buyer protection.

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