Transcription of The Pulp and Paper Making Processes
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The Pulp and Paper Making Processes
Chapter 2 The pulp and Paper MakingProcessesCONTENTSPageTHE pulp AND Paper MILL..17 Steps in the pulp and Papermaking ..18 Pulping .. View of Papermaking From Chemical pulp by the Kraft Groundwood pulp Mill Flow..Refiner Groundwood pulp MillSulfite pulp Mill ..Table2-1. MajorCommercial Wood-PulpingProcess..TableTechnologies ..Page..1921..22..25 Page..18 Chapter 2 The pulp and Paper Making ProcessesThe modem manufacture of Paper evolved froman ancient art first developed in China, ca. 105 the modem product differs considerablyfrom its ancestral materials, papermaking retainsdistinct similarities to the Processes developed byTs ai Lun in the Imperial Chinese Court. Inprinciple, Paper is made by: 1) pulping, to separateand clean the fibers; 2) beating and refining thefibers; 3) diluting. to form a thin fiber slurry,suspended in solution; 4) forming a web of fibers ona thin screen; 5) pressing the web to increase thedensity of the material; 6) drying to remove theremaining moisture; and 7) finishing, to provide asuitable surface for the intended end and Paper are made from cellulosic fibers( , fibers from trees) and other plant materials,although some synthetic materials may be used toimpart speci
THE PULP AND PAPER MILL Although there are several chemical and mechani-cal pulping methods used for delignifying wood (table 2-l), separating fibers, and removing discol-oration, all integrated pulp and paper mills involve the same general steps in the manufacture of pulp and paper. These steps include: 1 ) raw material
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