Method for producing a coated length of fibre sheet, in particular paper or cardboard

摘要

The method for producing a special fibrous web such as a coated paper or paperboard, comprises forming web from a fibrous material mixture with a headbox (2) and a wire section (3), dewatering the web in a pressing section (4), pre-drying the formed fibrous web (7) to obtain a residual moisture content, coating both web sides (7a, 7b) of the fibrous web, and redrying and rolling the fibrous web. In an on-line process, the web side is provided triply with coating section (11, 17, 18). The two last coating sections are applied directly with a 1:1-coating unit without intermediate drying. The method for producing a special fibrous web such as a coated paper or paperboard, comprises forming web from a fibrous material mixture with a headbox (2) and a wire section (3), dewatering the web in a pressing section (4), pre-drying the formed fibrous web (7) to obtain a residual moisture content, coating both web sides (7a, 7b) of the fibrous web, and redrying and rolling the fibrous web. In an on-line process, the web side is provided triply with coating section (11, 17, 18). The two last coating sections are applied directly with a 1:1-coating unit without intermediate drying, i.e. wet on wet manner. The first coating layer and/or a further and/or second coating section are applied indirectly with a film spreading unit and/or directly with a bladecoater. The first coating layer and/or the further and/or second coating layer are applied directly with a 1:1-coating unit. The first coating layer, a pigment containing pre-coating, a middle coating layer, a function layer and the last coating layer represent a covering and/or a protective layer. The first and second web sides are coated in multilayer manner. The coating layer has a coat weight of 70-120 g/m 2>of total or per web side. A curtain-coat coating unit or spray coating unit is used as 1:1-coating unit. Calendering of the fibrous material web is carried out before the pre-coating and/or the first coating layer and/or after the pre-coating and/or the first coating layer and/or before rolling. Independent claims are included for: (1) a machine for the production of a coated fibrous web; and (2) a special paper.