高濃度抄紙技術の研究開発 (第2報)

ヘッドボックスに関する研究開発

抄録

Development of an improved headbox, an important component in the high consistency forming process, resulted in the following : Fundamental analysis of changes in non-uniformity of consistency in high consistency pulp suspension, conducted in a duct model with various turbulence generators, proved possibility of dispersing flocks with little re-flocculation where a proper shape, dimension and arrangement were selected.
Saw-blade type flow channel created from such findings was the most preferable as a headbox element, with acceptable sheet formation resulting from good dispersion and smooth jet surface.
Survey was made on the pilot plant about the combination of headbox and former.
Samples obtained from the pilot plant tests well coincided with the headboxes' valuation.