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  • Paperboard Web Unwinds with Ease (.pdf)
    A&F Corporation, a machinery builder for the paper industry, recently completed the start-up of a slitter/ rewinder machine at a North American paper mill. The slitter/ rewinder is used for processing heavy paperboard into liner-board for beverage packaging. The machine's web unwind-stand has
  • The conversion of a kraft linerboard machine
    THE CONVERSION OF A KRAFT LINERBOARD MACHINE FROM ACID TO ALKALINE SIZING Sappi Technology Centre, Paper Sciences Department, PO Box 3252, Springs, 1560, South Africa ASA, calcium carbonate, white top liner board, Kraft liner board, alkaline sizing, Ngodwana The high quality graphics used
  • Straighter shooter
    barrel, the mill cuts the material to length and heat treats it. After preliminary prep, a Sabre machinist gun-drills the chamber end with a 0.75-in. hole about 11-in. deep. A temporary liner goes in the drilled hole, and the remainder of the barrel is gun-drilled with a 0.490-in. hole. Reaming
    of calcium carbonate, can solve these problems. An integrated mill producing Kraft liner from unbleached Kraft pulp and recycled fibers switched to our carbon dioxide based technology. Some of the benefits were improved process stability, improved runnability, significantly reduced amount of scaling
  • Plastic Bearings
    and electrical switch-gear, rolling-mill, and water-turbine bearings. In small instruments and clock motors, laminated phenolics serve as structural members as well as a bearing material. They have excellent strength and shock resistance coupled with resistance to water, acid, and alkali solutions
  • The conversion
    sizing system in conjunction with calcium carbonate. Laboratory investigations and mill trials were carried out to determine the feasibility of converting the rosin/kaolin system used for the production of white top linerboard at Sappi Ngodwana to an alkenyl succinic anhydride (ASA)/calcium carbonate

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