OUR PRODUCTS

FLUXOGRAM OF CELLULOSE PRODUCTION

Get to know the cellulose production flow chart and discover every step of our extensive work.

The process begins in the nursery with research and improvement of eucalyptus seedlings. From nursery the seedlings go to the planting in our horticultural hortos. After a cycle of 7 years the eucalyptus is cut, stripped and transported to the factory.

1. HARVEST

1. HARVEST

After a cycle of 7 years the eucalyptus is cut, stripped and transported to the factory, an operation that takes place inside the plantations where the eucalyptus trees are cultivated. Hulls, leaves and branches stay on the ground to turn organic matter.

2. CAVAC PRODUCTION

2. CAVAC PRODUCTION

After this process, the logs are taken for washing, pruning at predetermined size and sieving. From there, the chips are in a circular fence (wind fence) and silos.

3. COOKING

3. COOKING

In cooking, the chips form a brown paste, also called unbleached pulp. This process, which is called Kraft, occurs at 150º C with addition of Sodium Sulfide, dissolving the lignin and releasing the cellulose as pulp of higher quality paper.

4. DEPURATION, SLIDING AND BLEEDING

4. DEPURATION, SLIDING AND BLEEDING

Purification consists of separating the impurities from the wood and pieces of chips that have not been cooked. Thereafter, lignin, a substance which binds cellulose cells, is removed. In bleaching, the cellulose is subjected to a chemical treatment with oxidizing agents. This operation is done in 3 stages until the desired brightness is reached.

5. DRYING

5. DRYING

On drying, the cellulose water is withdrawn until it reaches a satisfactory balance with the relative humidity of the environment.

6. PACKING

6. PACKING

After drying, the cellulose sheets are cut and organized into bales, making transportation easier.

7. TRANSPORT

7. TRANSPORT

After being stored, the pulp is sent from the private port of the company in Guaíba to the Public Port of Rio Grande through Lake Guaíba and Lagoa dos Patos. One of the differentials of CMPC Celulose Riograndense is to have a location close to BR 290 that facilitates the transportation of wood from the most varied regions of the State.

8. MARKETPLACE

8. MARKETPLACE

The pulp produced at the Guaíba plant is used for the entire external market.

PAPER

CMPC Celulose Riograndense has a manufacturing unit for uncoated (offset) papers with high stiffness and high strength. This product line consists of Primapress papers (weights from 56g / m² to 180g / m²) and Primalaser (in the weight range 70g/m² to 90g/m²).

Aimed at the graphic and publishing industry, both have been developed to fully meet the needs and requirements during the polychrome printing process on both rotary presses and flatbed presses.

The papers of CMPC Celulose Riograndense are produced with 100% eucalyptus hardwood pulp, only with controlled wood and coming from reforested areas in accordance with environmental legislation respecting the community and the environment.

KNOW OUR FOREST PROCESS

As a forest-based company, whose activities depend on natural resources, CMPC Celulose Riograndense
is aware that it is its responsibility to contribute to the use of these renewable natural resources in the future,
both for its own business and for society as a whole.

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