Gravure paper and manufacturing process for this paper

A method of manufacturing gravure paper having a maximal roughness depth of approximately 1.40 μm in a paper machine comprising a forming system, a first press section, and a drying section, the method comprising:

• producing a stock suspension comprising a stock having a freeness of greater than or equal to approximately 50 ml CSF;
• forming an unfinished fibrous material web from the stock suspension;
• and
• applying at least one of a pigment and a filler slurry to the unfinished fibrous material web between a beginning of the forming system and a position at which the dry matter content of the unfinished fibrous material web is approximately ≦90%,
• wherein the applying further comprises applying at least one of the pigment and the filler on both sides of the unfinished fibrous material web.

A method of manufacturing gravure paper having a maximal roughness depth of approximately 1.40 μm in a paper machine comprising a forming system, a first press section, and a drying section, the method comprising:

• producing a stock suspension comprising a stock having a freeness of greater than or equal to approximately 50 ml CSF;
• forming an unfinished fibrous material web from the stock suspension;
• and
• applying at least one of a pigment and a filler slurry to the unfinished fibrous material web between a beginning of the forming system and a position at which the dry matter content of the unfinished fibrous material web is approximately ≦90%,
• wherein the applying of the at least one of the pigment and the filler slurry to the unfinished fibrous material web occurs in the press section of the paper machine.

A method of manufacturing gravure paper having a maximal roughness depth of approximately 1.40 μm in a paper machine comprising a forming system, a first press section, and a drying section, the method comprising:

• producing a stock suspension comprising a stock having a freeness of greater than or equal to approximately 50 ml CSF;
• forming an unfinished fibrous material web from the stock suspension;
• and
• applying at least one of a pigment and a filler slurry to the unfinished fibrous material web between a beginning of the forming system and a position at which the dry matter content of the unfinished fibrous material web is approximately ≦90%,
• wherein the applying is performed through a wire.

A method of manufacturing gravure paper having a maximal roughness depth of approximately 1.40 μm in a paper machine comprising a forming system having a headbox, a first press section, and a drying section, the method comprising:

• producing a stock suspension comprising a stock having a freeness of greater than or equal to approximately 50 ml CSF;
• producing a coating suspension comprising at least one of a filler and a pigment, the coating suspension having a fiber content in the range of between approximately 10% to approximately 95%;
• forming a fibrous material web comprising at least two layers with the headbox, wherein at least one layer is formed from the coating suspension and another layer is formed from the stock suspension;
• and
• forming a paper web by guiding the fibrous material web through the forming system, the first press section, and the drying section.

A gravure paper having a maximal surface roughness depth of 1.40 μm which is made in a paper machine comprising a forming system, a first press section, and a drying section by a method comprising:

• producing a stock suspension comprising a stock having a freeness of greater than or equal to approximately 50 ml CSF;
• forming an unfinished fibrous material web from the stock suspension;
• and
• applying at least one of a pigment and a filler slurry to the unfinished fibrous material web between a beginning of the forming system and a position at which the dry matter content of the unfinished fibrous material web is approximately ≦90%,
• wherein the stock suspension comprises a stock having a freeness of between approximately 50 ml to approximately 120 ml CSF.

A gravure paper having a maximal surface roughness depth of 1.40 μm which is made, in a paper machine comprising a forming system, a first press section, and a drying section, by a method comprising:

• producing a stock suspension comprising a stock having a freeness of greater than or equal to approximately 50 ml CSF;
• forming an unfinished fibrous material web from the stock suspension;
• and
• applying at least one of a pigment and a filler slurry to the unfinished fibrous material web between a beginning of the forming system and a position at which the dry matter content of the unfinished fibrous material web is approximately ≦90%,
• wherein the applying further comprises applying at least one of the pigment and the filler on both sides of the unfinished fibrous material web.

A gravure paper having a maximal surface roughness depth of 1.40 μm which is made, in a paper machine comprising a forming system, a first press section, and a drying section, by a method comprising:

• producing a stock suspension comprising a stock having a freeness of greater than or equal to approximately 50 ml CSF;
• forming an unfinished fibrous material web from the stock suspension;
• and
• applying at least one of a pigment and a filler slurry to the unfinished fibrous material web between a beginning of the forming system and a position at which the dry matter content of the unfinished fibrous material web is approximately ≦90%,
• wherein the applying further comprises simultaneously applying at least one of the pigment and the filler on both sides of the unfinished fibrous material web.

A gravure paper having a maximal surface roughness depth of 1.40 μm which is made, in a paper machine comprising a forming system, a first press section, and a drying section, by a method comprising:

• producing a stock suspension comprising a stock having a freeness of greater than or equal to approximately 50 ml CSF;
• forming an unfinished fibrous material web from the stock suspension;
• and
• applying at least one of a pigment and a filler slurry to the unfinished fibrous material web between a beginning of the forming system and a position at which the dry matter content of the unfinished fibrous material web is approximately ≦90%,
• wherein the applying of the at least one of the pigment and the filler slurry to the unfinished fibrous material web occurs in the press section of the paper machine.

A gravure paper having a maximal surface roughness depth of 1.40 μm which is made, in a paper machine comprising a forming system, a first press section, and a drying section, by a method comprising:

• producing a stock suspension comprising a stock having a freeness of greater than or equal to approximately 50 ml CSF;
• forming an unfinished fibrous material web from the stock suspension;
• and
• applying at least one of a pigment and a filler slurry to the unfinished fibrous material web between a beginning of the forming system and a position at which the dry matter content of the unfinished fibrous material web is approximately ≦90%,
• wherein the applying is performed through a wire.

A gravure paper having a maximal surface roughness depth of 1.40 μm which is made in a paper machine comprising a forming system having a headbox, a first press section, and a drying section by a method comprising:

• producing a stock suspension comprising a stock having a freeness of greater than or equal to approximately 50 ml CSF;
• producing a coating suspension comprising at least one of a filler and a pigment, the coating suspension having a fiber content in the range of between approximately 2% to approximately 60%;
• forming a fibrous material web comprising at least two layers with the headbox, wherein at least one layer is formed from the coating suspension and another layer is formed from the stock suspension;
• and
• forming a paper web by guiding the fibrous material web through the forming system, the first press section, and the drying section.