1986 Volume 40 Issue 2 Pages 160-165
Aiming at development of high consistency papermaking technology, optical measurement was made on the extent of dispersion and on the consistency fluctuation in the pulp suspension flowing in a closed channel provided with some turbulence generating elements. At the same time, a Laser Doppler Anemometer (LDA) measured the relationship between the dispersion and the flow characteristics.
A headbox incorporating prospective elements was trially made, and papermaking was conducted in combination with a twin wire test former. The paper made in this manner at 2.3% headbox consistency shows sheet formation index close to the commercially available paper.
A pilot plant started operation for proving high consistency papermaking technology, and for survey of overall paper quality.
