Size reversion in alkaline papermaking

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Webbby Martin A. Hubbe, North Carolina State University, [email protected] WebbLater in the century they made a size from flour starch which was added to the paper pulp in the tub or to the finished sheet after forming. In the mid 8th century papermaking was introduced to the Arab world ... After the emulsion settled, the excess alkaline liquors were skimmed off the top and discarded. Some papermakers let the size sit ...

Retention of Fines and Fillers During Papermaking, Item #0102B

WebbSize reversion in e Pap Robert W. Novak and Dominic S. Rende ABSTRACT ciency is the relationship between the Size response is hebped in uhdinepupmking by response and … WebbHydrophobes in Surface Treatment Formulations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .111 Retention ... the young ones ade edmondson

Visible Sizing– Causes for Sizing Loss and undesired Interactions

WebbEffects of Temperature, pH and Alkalinity on ASA Sizing in Alkaline Papermaking, 1996 Papermakers Conference Proceedings WebbScholarWorks at WMU WebbOnly the paper having the lowest AKD-dosage suffered from reduced water-resistance, the Cobb 60 -value changed from 34 to 79 g/m 2. The PCC filled papers stored in the same conditions lost some of their sizing, to a higher extent in the case of … the young ones characters names

Separation and analysis techniques for bound and unbound alkyl …

Alkyl Ketene Dimer Sizing Reversion and Efficiency in Papers

WebbEcolab Webbsystems is unsuitable in the alkaline environment. Instead, synthetic siz- ing agents such as alkyl ketene dimer (AKD) and alkenyl succinic anhy- dride (ASA) are the choice. AKD … safeway lewelling san leandroWebbChanges in wet end of alkaline papermaking affect the size development as well as sizing loss. These changes include pH, alkalinity and type of filler used. Precipitated and … safeway lexington

"WebbArticle “Size reversion in alkaline papermaking.” Detailed information of the J-GLOBAL is a service based on the concept of Linking, Expanding, and Sparking, linking science and technology information which hitherto stood alone to support the generation of ideas. " - Size reversion in alkaline papermaking

Size reversion in alkaline papermaking

Webb1 nov. 2016 · Alkyl ketene dimer (AKD) is the reactive synthetic sizing agent that is used in alkaline or neutral papermaking conditions to provide certain level of hydrophobicity to the paper and board. The sizing mechanism of AKD involves its reaction with the hydroxyl groups on cellulose. WebbSize reversion is the loss of size response with time after the paper has been made. The work reported here suggests that size reversion increases at higher pH. Both authors are at Nalco Chemical Co. "Pilot Plant Dynamics and AKD Sizing," by H.W. Kropholler and A. Mendes de Sousa.

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WebbSize reversion over days and weeks was also a problem depending on the PCC used, with larger PCC particles causing fewer problems but giving lower opacity. ... In alkaline papermaking, one will get improved sizing by using higher levels of high DS cationic starch. WebbFiber loading improvements in papermaking专利检索，Fiber loading improvements in papermaking属于 ...无机化合物专利检索，找专利汇即可免费查询专利， ...无机化合物专利汇是一家知识产权数据服务商，提供专利分析，专利查询，专利检索等数据服务功能。

WebbIncreasing paper drying temperature in the 180 to 2700F range reduced initial sizing for papers filled with precipitated calcium carbonate pigment. The negative effect of … Webb9 okt. 2024 · Changes of the morphology and pore structure of old corrugated container (OCC) fibers during an alkyl ketene dimer (AKD) sizing process were studied. The resulting samples were characterized by scanning electron microscopy (SEM), atomic force microscopy (AFM), contact angle, and BET surface area analysis. The length of fibers …

Webb7 juni 2008 · papermaking systems has been transformed to neutral-alkaline papermaking conditions, and in parallel, the use of acidic alum-rosin sizing has decreased.2 Under neutral-alkaline papermaking conditions, alum tends to be converted to neutral aluminum ﬂoc, Al(OH) 3, which is not an effective species for retaining rosin particle on ﬁber … WebbThe specific mechanism of AKD reversion is unclear. However, several processes have been suggested to explain the observed reversion. The most likely mechanisms from the literature are' Hydrolysis of AKD to form the less efficient sizing ketone, 2 Interaction of AKD with additives in the papermaking fixmish, 3,4,s,6,7

WebbSemantic Scholar extracted view of "Size reversion in alkaline papermaking." by W. NovakR et al. Skip to search form Skip to main content Skip to account menu. Semantic Scholar's Logo. Search 210,177,960 papers from all fields of …

Webb27 mars 2014 · In order to make the mechanism of size reversion for alkenyl succinic anhydride (ASA)-sized papers clear, an ASA-sized and CaCO3-filled commercial paper … the young ones british comedyWebbSize reversion in alkaline papermaking, TAPPI JOURNAL, August 1993, Vol. 76 (8) TAPPI conference proceedings and presentations, technical papers, and publication articles … safeway lethbridge westWebb31 mars 2024 · Paper sizing was found to be achieved by bound AKD. This means that an even lower additional level of AKD would be sufficient to ensure good paper sizing provided that it forms a chemical bond with furnish. This result is believed to be important in solving some problems associated with AKD sizing. the young ones cast listWebb13 apr. 2024 · The fabrication of pH-sensitive lignin-based materials has received considerable attention in various fields, such as biomass refining, pharmaceuticals, and detecting techniques. However, the pH-sensitive mechanism of these materials is usually depending on the hydroxyl or carboxyl content in the lignin structure, which hinders the … safeway lethbridge flyerWebb1 sep. 2000 · In order to make the mechanism of size reversion for alkenyl succinic anhydride (ASA)-sized papers clear, an ASA-sized and CaCO3-filled commercial paper … the young ones cast cliff richardWebbadvantages, technical teams in many papermaking mills want to switch to neutral-to-alkaline-pH papermaking systems without abandoning rosin-based sizing. Consequently, modified rosin sizes have attracted interest in the field (Ozaki and Sawatari 1997; Kitaoka et al. 2000; Matsushita et al. 2004). Alternatively, some the young ones cliff richard youtube safeway lethbridge jobs