In this study, the use of modified calcite as a filler in fluting paper production was investigated and its effect on retention some mechanical properties papers investigated. Ground calcium carbonate (GCC/calcite) cationic starch were used for modification. Filler modification with alum CPAM resulted starch-calcite encapsulation. Produced (MC) at certain dosages. Simultaneously, made unmodifie...

At present, the production of flame-retardant paper usually uses impregnation method phos-phorus-nitrogen flame retardants in paper. There are few reports on application an in-pulp addition method. In this paper, solubility ammonium polyphosphate (APP) and its effect were investigated for use It was found that APP particles square, with average particle size 21.88 μm. The decreased significantl...

Abstract In the context of hyperbolic systems balance laws, Shizuta–Kawashima coupling condition guarantees that all variables system are dissipative even though is not totally dissipative. Hence it plays a crucial role in terms sufficient conditions for global time existence classical solutions. However, easy to find physically based models do satisfy this condition, especially several space d...

White ledger is white-grade recycled pulp that replaces the bleached kraft pulp (BKP) that typically forms the top ply of duplex boards. However, sheets made from white ledger are inferior in strength compared with those made from virgin pulp. Therefore, it is necessary to select a proper additive in order to overcome the disadvantages of using white ledger. In this study, the physical properti...