| 초록 |
If RDA needs additional dilution of stock in order to enhance the formation of RDA sheet more, introduction of post dilution water in “Stock Tank” and pre-filling water in “Forming Tank” could be considered. Post dilution water means additional water for dilution of stock where the whole additives are already added. Although excessive dilution of stock before the introduction of additives could result in unreal mixing of wet–end chemicals, the additional introduction of dilution water in “Stock Tank” may not cause the above mentioned error. If the total volume of slurry in “Forming Tank” exceeds 2,500 mL, installation of extension ring on “Forming Tank” could be suggested in order to prevent the overflow of stock. With a view to dilute the stock at “Forming Tank”, forming tank could be filled with certain amount of dilution water called “Pre-Filling Water”. According to the introduction of slurry from “Stock Tank”, mixing of stock and “Pre-Filling Water” is to be made consequently. Here the volume of “Pre-Filling Water” should be smaller than that of introducing stock from “Stock Tank”. Otherwise sufficient mixing by falling action could not be made due to the deficiency of mixing power. |
