| 摘要 |
A stock feed system for a multi-layer headbox in which a stock concept is passed into each inlet header in the multi-layer headbox. The stock concepts are produced out of the same fresh stock by adding chemicals and fillers to divided portions of that fresh stock. To this end, the system includes a single fresh-stock container, and stock lines into which the fillers, additives and equivalent are added in compliance with the requirements of each concept. The stock feed system also includes at least one fiber distributor for transferring long fibers out of the stock that is destined to form the surface layer of the paper into the stock that is destined to form a layer placed in the interior of the paper, preferably the middle layer. Fibers having a shorter length, compared with the average distribution of fibers in the basic stock derived from the stock container, are allowed to remain in the surface layer of the paper/board, and longer fibers, compared with the average distribution of fibers, are allowed to remain in the middle layer and/or are transferred into the middle layer.
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