Molnlycke Ab

Sven Ulrik Aberg

Sven Gunnar Bergdahl

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.

Method for producing fluffed pulp

The present invention relates to fluffed pulp comprising unwashed mechanical pulp with a liquid-diffusing capacity of at least 3.5 grams liquid per gram pulp per minute, a bulk of at least 18 cm.sup.3 /gram and a volume weight in blocks or bales of at most 0.8 grams/cm.sup.3. The invention also comprises a method of producing such a fluffed pulp by means of defibrating the wood and thereafter drying the same with warm air to a dry content of 80-95% by weight without subjecting the pulp to any mechanical compression.

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Molnlycke, Sweden

Sven Ulrik Aberg