초록 ▼

The invention concerns a method for producing a paper web. According to the method a stock is produced from the fibrous raw material and the stock is formed to a web which is dried on a paper machine. According to the invention the stock is formed from a mechanical pulp prepared from wood material o

The invention concerns a method for producing a paper web. According to the method a stock is produced from the fibrous raw material and the stock is formed to a web which is dried on a paper machine. According to the invention the stock is formed from a mechanical pulp prepared from wood material of the Populus family and from bleached chemical spruce pulp, whereby the amount of the mechanical pulp is 20 to 70 weight-% and the amount of the bleached chemical softwood pulp is 80 to 30 weight-% of the dry matter of the stock. It is preferred to use an aspen pulp, over 70% of the fiber fractions of which comprise fiber fractions +100, +200 and -200, and the proportion of the -200 fraction is 45% or less. A coated fine paper can be produced from the paper web whose properties are better than those of a traditional fine paper having the corresponding bulk and grammage, on the same capacity level the paper produced by the invention will give a yield gain of up to more than 20%.

대표청구항 ▼

1. Method of producing a coated fine paper, comprisingforming a stock from a) a pressure ground wood pulp of a wood raw material of the Populus family, about 10 to 20% of the fiber sizes of the pressure ground wood pulp being between +28 and +48 mesh, and the fiber fractions +100, +200 and -200 bein

1. Method of producing a coated fine paper, comprisingforming a stock from a) a pressure ground wood pulp of a wood raw material of the Populus family, about 10 to 20% of the fiber sizes of the pressure ground wood pulp being between +28 and +48 mesh, and the fiber fractions +100, +200 and -200 being more than 50% of the fiber fractions of the pulp, and b) a bleached chemical softwood pulp, wherein the amount of pressure ground wood pulp is 20 to 70 weight-% and the amount of bleached softwood pulp is 80 to 30 weight-% of the dry matter of the stock, forming the stock into a web and drying the web to form a base paper having a grammage of 30 to 200 g/m2, and coating the base paper to produce a coated fine paper having a grammage of 50 to 220 g/m2 and exhibiting an opacity over 90%, a brightness over 90% and a gloss over 70%.