Classifications

• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
  • D21H19/00—Coated paper; Coating material
  • D21H19/66—Coatings characterised by a special visual effect, e.g. patterned, textured
• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
  • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
  • D21F11/02—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the Fourdrinier type
  • D21F11/04—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the Fourdrinier type paper or board consisting on two or more layers
• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
  • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
  • D21H27/30—Multi-ply
  • D21H27/38—Multi-ply at least one of the sheets having a fibrous composition differing from that of other sheets
• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
  • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
  • D21H11/14—Secondary fibres
• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
  • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
  • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
  • D21H23/22—Addition to the formed paper
  • D21H23/24—Addition to the formed paper during paper manufacture

Definitions

• the invention relates to a multilayer paper and to a method and a device for the production of this multi-layer paper according to the preamble of the first Claim and claims 4 and 9.
• Packaging papers are currently trying to produce papers that are used in its Z axis (axis perpendicular to the surface) with respect to its fiber and Solid concentration have a strong dependence on depth. So on the one hand tries low-quality materials with the help of multi-layer headboxes (Waste paper base) in the middle layer of the paper and the high quality respectively expensive materials only on the outer layers or an outer layer where they essentially determine the quality of the paper, and so on For example, to be suitable for printability.
• Waste paper base multi-layer headboxes
• Another process uses several headboxes (secondary headboxes) with which individual layers of paper with different properties are applied in succession to one or more Fourdrinier sieves, creating a multi-layer paper that consists of a high-quality, mostly bleached, printable cellulose layer on at least one side (e.g. White Top Liner ").
• second headboxes with which individual layers of paper with different properties are applied in succession to one or more Fourdrinier sieves, creating a multi-layer paper that consists of a high-quality, mostly bleached, printable cellulose layer on at least one side (e.g. White Top Liner ").
• the object of the invention is to produce a new product which is simpler and cheaper To create (paper) which has a better surface in terms of its printability offers.
• a second object of the invention is to develop a method and a device with which a reduction of the drainage energy is possible and only one requires little mechanical effort.
• top layer not a paper layer consisting of expensive raw materials, but one Contains dash.
• the inventors have recognized that existing paper manufacturing machines with the solution according to the invention for single-ply papers in a simple way on a two-ply Product (single-ply paper and top coat) are convertible and surprising Way the above desired properties can be achieved.
• a method for producing a paper or cardboard is used at least one, in particular white top layer, not containing paper fibers proposed, a fiber layer with a headbox and a subsequent Shaper or Fourdrinier wire is produced.
• the fiber layer is at least a press section and then a drying section. It can the wet and / or the dryer section with a glue or film press or another Be equipped.
• At least one stroke is made with the help of a coater or applied to a film press, which gives the paper the top layer (top layer) with the special properties, such as good printability or a special one Appearance e.g. marbled (mottled), gives.
• the process can be an on-line or an off-line process.
• At least one coating device can be installed between the wet end and the winding machine without changing the machine concept, i.e. the existing paper machine, in order to replace the running paper or cardboard web with the top coat instead of the previous, more expensive one white "- fiber layer (paper layer).
• the top coat can be used as a single or multiple stroke or applied without intermediate drying.
• the fibrous layer which according to the invention contains no expensive bleached raw materials, can best be covered with the top coat.
• the top coat (single or multiple coat) can consist only of color, the color in turn consisting of additives, pigments and binders which are suspended in liquid (preferably water).
• the top coat can also contain fiber in addition to the color.
• the properties (solids content, application quantity, composition, Viscosity, pigment size etc.) of the top coat according to the chosen one Commissioned work can be set so that, for example, a homogeneous or marbled impression. This look can of course also with a doctor element as an application element, which has a special defined surface has to be generated.
• the paper provided with the top coat can then still be known Be smoothed in smoothing devices with hard nip; with hard hot Nip; Soft nip; or hot soft nip or any combination of these.

Landscapes

• Paper (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=7818835

Family Applications (1)

Country Status (3)

Cited By (2)

Families Citing this family (7)

Family Cites Families (21)

• 1997
  • 1997-01-31 DE DE19703466A patent/DE19703466A1/de not_active Withdrawn
  • 1997-12-24 EP EP97122892A patent/EP0856607A3/fr not_active Withdrawn
• 1998
  • 1998-01-29 US US09/015,588 patent/US6299728B1/en not_active Expired - Fee Related

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