Paper and process for manufacturing paper using microfibrillated cellulose in the cellulose pulp
AssigneeKlabin S.A.
InventorsRenato Augusto Pereira Damásio, Marcelo Coelho Dos Santos Muguet Soares
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Abstract
The present invention relates to a papermaking process of kraft paper, sackraft or paperboard comprising adding 1.0 to 1.5% by weight of MFC with a preferred average diameter between 1 and 568 nanometers and starch ranging from 1.0 to 10.0 kg/ton, preferably 5.0 kg/ton, generating a pulp with higher concentration of microfibers and improved strength, and consequently, a final paper with grammage ranging from 60 to 440 g/m2 and with improved strength properties for use in packaging materials.
Claims10
A paper comprising microfibrillated cellulose in an amount of 1.0 to 1.5% in weight of a cellulose pulp and starch in an amount of 1.0 to 10.0 kg/ton of the cellulose pulp, wherein the paper has grammage from 60 to 440 g/m2, and wherein the microfibrillated cellulose is used as a strength additive and has diameter from 99 to 568 nanometers, wherein the paper is made by mixing the cellulose pulp with said microfibrillated cellulose and said starch in a mixing tank, the paper being a kraftliner, testliner, sack kraft, corrugated paper, or paperboard.
A process for making a paper, comprising:
- mixing microfibrillated cellulose (MFC) in an amount of 1.0 to 1.5% in weight of a cellulose pulp and starch in an amount of 1.0 to 10.0 kg/ton of the cellulose pulp with the cellulose pulp in a mixing tank to provide a pulp mixture, and
- forming the paper from the pulp mixture,
- wherein the paper has grammage from 60 to 440 g/m2 and diameter of the microfibrillated cellulose is from 99 to 568 nanometers.
Dependencies are inferred from the claim text.