Method for adjusting the fibrous properties of pulp

Details Method for adjusting the fibrous properties of pulp Method for adjusting the fibrous properties of pulp

D - Textiles, Paper

21

B

D21B 1/00 (2006.01) B07C 5/14 (2006.01) D21C 1/00 (2006.01)

Patent

CA 2478363

The invention relates to a method for adjusting the fibrous properties of chemical pulp, mechanical pulp or chemi-mechanical pulp, for adjusting the smoothness of the properties and for decreasing any variation in quality. According to the method, in the manufacture of pulp, a wood material is used, which is selected according to the number of the tree~s annual rings. The wood material is classified according to the number of annual rings into categories that represent a certain fibre dimension property, such as the fibre length or the fibre coarseness. The wood material is classified by log or group of logs at any stage in connection with the felling of the wood or in the plant or at some stage of the chain between the stub and pulping and grinding or a refiner.

L'invention porte sur un procédé visant à ajuster les propriétés fibreuses de la pâte chimique, de la pâte mécanique ou de la pâte chimio-mécanique, ajuster le lissé et réduire toute variation de qualité. Selon ce procédé, on utilise, dans la fabrication de la pâte, un produit ligneux sélectionné en fonction du nombre des cernes de l'arbre. En fonction du nombre des cernes, on classe le produit ligneux en catégories qui représentent une certaine propriété de dimension des fibres telle que leur longueur ou leur grosseur. On classe le produit ligneux par grume ou groupe de grumes à n'importe quel stade de l'abattage du bois ou de la moisson de la plante ou à n'importe quel stade de la chaîne, entre la souche et la réduction en pâte et entre le défibrage ou le raffinage

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