Size reversion in alkaline papermaking
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 … 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 ...
Size reversion in alkaline papermaking
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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 … 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.
Webb1 juni 2009 · The unfilled papers stored protected from ambient atmosphere after papermaking showed only a marginal reduction in sizing during prolonged storage. Only … 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 …
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 … Webb1 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 …
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 …
Webbalkaline systems are generally re- served for neutral rosin. The Dumas description carefully outlines the step- by-step sequence of events in the alkaline sizing process and describes its greater fragility or sensitivity to other papermaking environmental factors. The rosin-alum system is different because the size precipitate french onion meatball subWebbEcolab french onion one pot pasta recipeWebbFiber 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。 fastly docsWebbSize 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. french onion meatloaf recipeWebbThe amount of dissolved calcium carbonate can be kept low at the relatively high temperature in the wet end and at the pH range 7.5-8.5. An optimal concentration of … french onion pasta recipe tik tokWebbsizing using rosin size due to its better hydrophobicity and lesser size reversion, as well as better durability of paper produced (Lee and Luner, 2005, Song et al., 2012). Conversion … french onion orecchietteWebb1 okt. 2008 · ASAs are generally synthesized by reacting maleic anhydride with alkenes having chain length in the range of about 14e20 carbons via Alder-ene reaction [27,28], … french onion noodle casserole