| 摘要 |
The improvements are characterized in that the aqueous, acid, saline bath contains ammonium sulphate, especially being an aqueous solution containing sulphuric acid, ammonium sulphate and sodium sulphate, and/or - preferably and - in that, after the desulfurization of the cellulose hydrate tube, the latter is treated with a first amount of a plasticising material, subjected to a first drying step in the blown form, treated with the second amount of a plasticising material, internally coated with a lubricating material optionally further containing one or more materials of the group consisting of colouring, aromatizing and flavouring agents, subjected to a second drying step in the blown form, flattened, optionally wound and optionally shirred. The humidification may be carried out between the (only or second) drying and the winding or during the shirring by applying water or a portion or all of the lubricating material. |
