Manufacturing process

Manufacturing process

Understanding the pulp production process

The manufacture of paper pulp needs cellulose fibers from harvest wood. These fibers mainly come from forestry by-products (wood from thinning forest operation, wood chips, etc.). The diagram below shows the different stages of this production.

Process
Wood chip cooking

Wood chip cooking

As part of the production process, the timber is debarked and shredded, then cooked using the combined action of heat and chemicals (white liquor) to extract the cellulose which composes the pulp.

Deuxième étape

Washing

The cellulose is washed.

Bleaching process

The cellulose is then bleached (only for bleached kraft pulp at the Saint-Gaudens site).

 

Pulp formation

Pulp formation

Pulp is then pressed dried before being cut into large sheets.

Packaging and shipping

Packaging and shipping

The pulp sheet is packaged into 250 kg bales. These are shipped to customers in batches of 8.

Technical data sheets

BHKP X BHKP T

BSKP X  BSKP T

UKP

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