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1. Disintegration
The aim of this disintegration (or pulping) phase is to separate the fibers from each other, so as to obtain a homogeneous fibrous suspension.
When the pulp is manufactured in the mill itself (integrated mill or using recovered paper), this suspension phase is not necessary. In the case of non-integrated mills, i.e. when raw materials are purchased externally, pulp usually arrives in the form of bales, made up of pulp sheets with a moisture content of around 10%. These sheets must be disintegrated and suspended in water.
As is customary in the industry, the percentages given are, unless otherwise specified, percentages by mass.
This operation is generally carried out in cylindrical containers (pulpers) equipped with toothed or bladed rotors, capable of creating...
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