Method for producing fluffed pulp

Details Method for producing fluffed pulp Method for producing fluffed pulp

1975-12-01

1978-03-28

Fisher, Richard V.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Waste paper or textile waste

162 28, 162100, 162142, 162147, 241 28, D21B 102, D21B 132, D21D 102, D21F 1114

Patent

active

040813169

ABSTRACT:
Improved fluffed pulp consisting of 95 to 25 percent by weight groundwood and 5 to 75 percent by weight chemical pulp, with a liquid retention capacity of at least 6.5 gram liquid per gram pulp, a liquid dispersing capacity of at least 2.5 gram liquid per gram pulp per minute, a bulk of at least 18 cm.sup.3 /gram and a web strength of at least 0.2 Newton, and a method of producing said pulp by mixing 95 to 25 percent by weight groundwood and 5 to 75 percent by weight chemical pulp beaten in a wet state with each other, dewatering mechanically to a dry solids content of 40 to 50 percent by weight, coarse-defibrating, drying in a flash drying step to 60 to 85 percent by weight, finish-defibrating and finish-drying to 80 to 95 percent by weight dry solids content.

REFERENCES:
patent: 3377234 (1968-04-01), Illingworth
patent: 3446696 (1969-05-01), Illingworth
patent: 3454463 (1969-07-01), Welsh
patent: 3627630 (1971-12-01), Gagnon

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