EP1584458B1 - Method for manufacturing a multi-ply fibrous cellulosic product - Google Patents

Method for manufacturing a multi-ply fibrous cellulosic product Download PDF

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Publication number
EP1584458B1
EP1584458B1 EP05290711A EP05290711A EP1584458B1 EP 1584458 B1 EP1584458 B1 EP 1584458B1 EP 05290711 A EP05290711 A EP 05290711A EP 05290711 A EP05290711 A EP 05290711A EP 1584458 B1 EP1584458 B1 EP 1584458B1
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EP
European Patent Office
Prior art keywords
cylinder
ply
embossing
pattern
glue
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
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EP05290711A
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German (de)
French (fr)
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EP1584458A1 (en
Inventor
Sylvain Breteau
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Essity Operations France SAS
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Georgia Pacific France SAS
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/07—Embossing, i.e. producing impressions formed by locally deep-drawing, e.g. using rolls provided with complementary profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0758—Characteristics of the embossed product
    • B31F2201/0761—Multi-layered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0758—Characteristics of the embossed product
    • B31F2201/0761—Multi-layered
    • B31F2201/0764—Multi-layered the layers being nested
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0771—Other aspects of the embossing operations
    • B31F2201/0774—Multiple successive embossing operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0784—Auxiliary operations
    • B31F2201/0787—Applying adhesive

Definitions

  • the invention relates to the field of cellulose wadding products for sanitary or domestic use and aims in particular products cut into formats such as napkins or tissues.
  • Cellulose wadding also referred to as tissue paper in the field, is a lightweight and absorbent material that has been developed for the above mentioned applications. It enhances the qualities of softness or wet or dry resistance according to the particular use for which it is intended. For example, for a tissue paper, it puts priority softness because it comes into contact with the skin, especially the nose is very sensitive. In the case of a napkin, it favors the textile touch and a certain stiffness to imitate the drape of textile towels. In order to be able to combine several qualities, it is necessary to combine several plies of cellulose wadding of low grammage, embossed or not, each having different properties or not.
  • the Applicant has developed a napkin or tissue product consisting of several plies of cellulose wadding assembled by edge gluing along its periphery.
  • This product is covered by the patent EP 670,773 .
  • a method of manufacturing this product with three or four plies is represented on the figure 1 .
  • the machine is composed of a cylinder engraved according to the pattern forming the peripheral zone of the product; the pattern is composed for example of pins regularly distributed along strips arranged so as to form a frame.
  • the etching pattern corresponds to several juxtaposed products as described in FIG. EP 0893242 .
  • the cylinder 10 cooperates with a pressure cylinder 12 of parallel axis, made of rubber or other equivalent material, for embossing a first sheet of tissue paper 100 which is engaged between the two.
  • a sheet 100 with two superposed plies.
  • the double sheet is driven onto the cylinder 10 against the etching of which it is applied by the cylinder 12.
  • Glue preferably water-based, such as a polyvinyl glue, is deposited on the raised surfaces of the etching by means of
  • the gluing device shown comprises a cylinder communicating with a doctor chamber in which it takes a metered quantity of glue, and an applicator cylinder on which it deposits the glue.
  • the applicator roll deposits the glue on the surface elements in relief of the sheet 100, against which it is supported.
  • the cylinder 10 cooperates with a second pressure cylinder 16, said marrying cylinder, to ensure the connection of the first sheet 100 with a second sheet (or strip) of tissue paper 110.
  • the sheet or strip of tissue paper 100 is transferred in part onto the inner face of the second sheet which is brought into contact with the first sheet at the marrying roll.
  • the pressure exerted by the marrying cylinder 16 on the two strips of paper ensures the formation of a bond.
  • the second strip 110 is one or two plies.
  • tissue paper eg 60g / m 2
  • This combines good resistance in use and softness to the touch.
  • the delamination resistance in particular that of the outer ply corresponding to the second ply of the strip 110 above, is not satisfactory for the products with four plies.
  • this method of gluing does not make it easy to dose the amount of glue to be applied for the formation of the connection so as to provide an amount just sufficient to bind the plies between them without too much stiffen the handkerchief.
  • second fold of tissue paper 107 moves around a pressure cylinder 110, and is embossed on a second embossing cylinder 112 of steel or other equivalent material.
  • a printing unit 113 (containing pigments) prints the tissue paper 107 at the second embossing roll 112.
  • the two folds 101 and 107 are then assembled by passing together between the first embossing roll 104 and a match roll 117.
  • the assembly here is of the "nested" type, that is to say that the protuberances formed on the fold 101 fit between the protuberances formed on the fold 107.
  • the advantage of the solution disclosed in this patent is to confine the pigments between the two plies and to synchronize the print pattern with the embossing pattern.
  • the Applicant has also developed a method of manufacturing products in format having a peripheral edge and a printing pattern.
  • glue is applied to a first ply along a defined glue pattern to form a seal along the edge of the product, a second ply of paper is applied to the first to form a partial bond, the assembly to a printing station where it is printed on one of its surfaces and the connection is completed by an embossing step.
  • This process makes it possible to produce products of good print quality thanks to the prior binding of the folds to one another, but it does not make it possible to print folds separately.
  • the applicant has set as its goal the production of cut products in tissues of the type handkerchief or towel of at least three folds, combining the advantages of a good combination of plies and decoration patterns that can be varied, and possibly colored differently on both sides of the products.
  • the invention has the double advantage sought. It makes it possible to associate the last fold with the others effectively by the second glue, while allowing, by the pattern of the second cylinder, to bring an additional decoration on the rear face of the final product.
  • the advantages induced by the process are also to obtain a product whose backside is smooth because it is not necessary to exert significant pressure by the second pressure cylinder.
  • the product remains flexible despite a deposit of glue on a large surface of the product.
  • the second cylinder can be etched according to a second etching pattern.
  • the glue is deposited on the third fold by means of an applicator roll, without prior embossing of the fold on the second roll.
  • This solution keeps the third fold its initial thickness and softness.
  • the glue is deposited on the third fold by means of an applicator roll the sheet having been previously embossed on the second roll.
  • This solution allows to vary the patterns in case some would not be printed satisfactorily without embossing.
  • it proceeds in such a way that the embossing leads to the formation of protuberances on the third fold of low height, in particular less than 0.1mm.
  • the first cylinder is etched in a pattern representing the periphery of a product cut in the format.
  • At least the glue applied to the third fold is colored.
  • the pattern corresponding to the glued surface is clearly visible on the finished product.
  • the second pressure cylinder has a hardness greater than that of the first cylinder.
  • a first sheet (or ply) 201 of cellulose wadding, single or double, is guided from a reel not shown, to an embossing unit comprising a first engraved cylinder 210 and a first pressure cylinder 212 of rubber or other material with the appropriate hardness.
  • the sheet is embossed by passing through the nip between the two cylinders 210 and 212.
  • the sheet is pressed against the first cylinder 210 which it matches the relief.
  • the engraving on the first cylinder 210 forms, for example, strips arranged in a square or rectangle in the manner of frames of a determined width, as reported in the applicant's patent EP 684132 .
  • a sizing unit 214 comprising an applicator roll 214 'deposits glue, preferably water based such as a polyvinyl glue, on the raised parts of the sheet pressed against the cylinder. 210 and whose form she marries.
  • glue preferably water based such as a polyvinyl glue
  • the cylinder then brings the sheet 201 to an area where it is accosted by a second sheet (or fold) 202, fed from a second reel for example of tissue paper.
  • the sheet 202 is itself accosted by a third sheet 203 of tissue paper, on its other side. This sheet 203 is also derived from a mother reel not shown.
  • the third sheet 203 is guided around a second cylinder 215 whose axis is coplanar with that of the first engraved cylinder 210, and having on the surface a printing pattern type pattern.
  • the second cylinder 215 preferably does not exert pressure on the first cylinder 210.
  • the third sheet 203 preferably a single ply, is glued by a second gluing unit 216 when in contact with the cylinder 215 .
  • the sheet 203 is not subjected to the pressure of a pressure cylinder before it passes between the second gluing unit 216 and the second engraving cylinder 215.
  • the pressure exerted by the gluing cylinder (not referenced) of the second gluing unit 216 is sufficient to transfer the glue to the portions of the third sheet 203 supported by the print pattern etched on the second cylinder 215.
  • the glue can be advantageously colored so that the pattern is visible on the finished product.
  • the third sheet 203 accost the sheet 202 in the region forming the gap between the first (210) and second (215) cylinders.
  • the three sheets 201, 202 and 203 thus superimposed are then subjected to the pressure of a marrying cylinder 218 disposed downstream, and the sheets are bonded together at this level.
  • the pattern engraved on the second cylinder 215 preferably comprises a zone which overlaps at least partially the pattern engraved on the first engraved cylinder 210 so that the glue provided by the second sizing unit 216 effectively participates in the connection of the third fold 203 on the second fold 202.
  • the amount of glue provided by the glue 216 then need not be important; it suffices that it allows the connection of the second fold 202 to the third fold 203.
  • the marrying cylinder 218 no longer needs to exert a significant pressure on the plywood sheet because the glue does not have to cross the thickness of a fold to ensure the binding of the plies.
  • the hardness of the marrying cylinder 218 is greater than that of the first pressure cylinder 212.
  • the first embossing cylinder may have a hardness of 60 shore while that of the pressure cylinder of 55 shore.
  • this embodiment also makes it possible to easily vary the pattern printed by the second engraved cylinder 215.
  • the technical constraints to make a so-called printing cylinder are much less than those required for the production of an embossing cylinder.
  • it is much freer to the extent that it does not fulfill any technical function related in particular to the softness, the thickness or the breaking strength of the sheet.
  • the second cylinder 215 may be smooth. It then cooperates with a cylinder of the gluing unit 216 which itself has a raised pattern.
  • a pressure cylinder (not shown) may be provided in order to perform an embossing upstream of the gluing of the third sheet 203.
  • the height of the protuberances formed by the pattern will be less than 0.1 mm.
  • FIG 4 an example of cut products according to the invention with a first common face A and a rear face whose decorations are different.
  • four different decorations B1, B2, B3, B4 have been represented, these four decorations being able to be made in different colors B'1, B'2, B'3 and B'4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Laminated Bodies (AREA)
  • Artificial Filaments (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Abstract

To produce a multi-layer cellulose fiber web, for use as table napkins or handkerchiefs, at least one web layer (201) is embossed between an embossing (210) and a pressure (212) roller, and a glue is applied to the embossed relief peaks in the layer as it is carried by the embossing roller through a glue stattion(214) where a roller (214') transfers the glue. A second layer (202) is applied to the glued embossed peaks. A third layer (203) is glued (216) and applied by a structured roller (215) with a further embossing pattern, to be carried through a gap between the embossing roller and a further press roller (218) which bonds the layers together with an embossed pattern.

Description

L'invention concerne le domaine des produits en ouate de cellulose à usage sanitaire ou domestique et vise en particulier les produits découpés en formats tels que des serviettes de table ou des mouchoirs.The invention relates to the field of cellulose wadding products for sanitary or domestic use and aims in particular products cut into formats such as napkins or tissues.

L'ouate de cellulose, désignée aussi papier tissue dans le domaine, est un matériau léger et absorbant qui a été développé pour les applications mentionnées ci dessus. On en renforce les qualités de douceur ou de résistance à l'état humide ou sec en fonction de l'usage particulier à laquelle elle est destinée. Par exemple pour un mouchoir en papier, on met en priorité la douceur car il vient au contact de la peau, en particulier du nez qui est très sensible. Dans le cas d'une serviette de table, on privilégie le toucher textile et une certaine raideur pour imiter le drapé des serviettes textiles. Afin de pouvoir associer plusieurs qualités, on est amené à combiner entre eux plusieurs plis d'ouate de cellulose de faible grammage, gaufrés ou non, présentant chacun des propriétés distinctes ou non.Cellulose wadding, also referred to as tissue paper in the field, is a lightweight and absorbent material that has been developed for the above mentioned applications. It enhances the qualities of softness or wet or dry resistance according to the particular use for which it is intended. For example, for a tissue paper, it puts priority softness because it comes into contact with the skin, especially the nose is very sensitive. In the case of a napkin, it favors the textile touch and a certain stiffness to imitate the drape of textile towels. In order to be able to combine several qualities, it is necessary to combine several plies of cellulose wadding of low grammage, embossed or not, each having different properties or not.

La demanderesse a développé un produit de type serviette de table ou mouchoir constitué de plusieurs plis d'ouate de cellulose assemblés par collage de bord le long de sa périphérie. Ce produit est couvert par le brevet EP 670 773 . Un mode de fabrication de ce produit à trois ou quatre plis est représenté sur la figure 1. La machine est composée d'un cylindre gravé 10 selon le motif formant la zone périphérique du produit ; le motif est composé par exemple de picots répartis régulièrement le long de bandes disposées de manière à former un cadre. De préférence, le motif de gravure correspond à plusieurs produits juxtaposés comme cela est décrit dans le brevet EP 0893242 . Le cylindre 10 coopère avec un cylindre de pression 12 d'axe parallèle, en caoutchouc ou en un autre matériau équivalent, pour gaufrer une première feuille de papier tissue 100 que l'on engage entre les deux. Sur la figure 1, on a représenté une feuille 100 à deux plis superposés. La feuille double est entraînée sur le cylindre 10 contre la gravure duquel elle est appliquée par le cylindre 12. De la colle, à base aqueuse de préférence, telle qu'une colle polyvinylique, est déposée sur les surfaces en relief de la gravure au moyen d'un dispositif encolleur 14. Le dispositif encolleur représenté comprend un cylindre communiquant avec une chambre à racle dans laquelle il prélève une quantité dosée de colle, et un cylindre applicateur sur lequel il dépose la colle. Le cylindre applicateur dépose à son tour la colle sur les éléments de surface en relief de la feuille 100, contre lesquels il est maintenu en appui.The Applicant has developed a napkin or tissue product consisting of several plies of cellulose wadding assembled by edge gluing along its periphery. This product is covered by the patent EP 670,773 . A method of manufacturing this product with three or four plies is represented on the figure 1 . The machine is composed of a cylinder engraved according to the pattern forming the peripheral zone of the product; the pattern is composed for example of pins regularly distributed along strips arranged so as to form a frame. Preferably, the etching pattern corresponds to several juxtaposed products as described in FIG. EP 0893242 . The cylinder 10 cooperates with a pressure cylinder 12 of parallel axis, made of rubber or other equivalent material, for embossing a first sheet of tissue paper 100 which is engaged between the two. On the figure 1 there is shown a sheet 100 with two superposed plies. The double sheet is driven onto the cylinder 10 against the etching of which it is applied by the cylinder 12. Glue, preferably water-based, such as a polyvinyl glue, is deposited on the raised surfaces of the etching by means of The gluing device shown comprises a cylinder communicating with a doctor chamber in which it takes a metered quantity of glue, and an applicator cylinder on which it deposits the glue. The applicator roll deposits the glue on the surface elements in relief of the sheet 100, against which it is supported.

Le cylindre 10 coopère avec un deuxième cylindre de pression 16, dit cylindre marieur, pour assurer la liaison de la première feuille 100 avec une deuxième feuille (ou bande) de papier tissue 110. La colle encore humide sur les parties en relief de la première feuille ou bande de papier tissue 100 est transférée en partie sur la face interne de la deuxième feuille qui est mise en contact avec la première feuille au niveau du cylindre marieur. La pression exercée par le cylindre marieur 16 sur les deux bandes de papier assure la formation d'une liaison. Selon que l'on souhaite réaliser un produit à trois ou quatre plis, la deuxième bande 110 est à un ou deux plis.The cylinder 10 cooperates with a second pressure cylinder 16, said marrying cylinder, to ensure the connection of the first sheet 100 with a second sheet (or strip) of tissue paper 110. The still wet glue on the raised parts of the first The sheet or strip of tissue paper 100 is transferred in part onto the inner face of the second sheet which is brought into contact with the first sheet at the marrying roll. The pressure exerted by the marrying cylinder 16 on the two strips of paper ensures the formation of a bond. According to whether it is desired to produce a product with three or four plies, the second strip 110 is one or two plies.

Pour fabriquer un mouchoir en papier par exemple de 60g/m2, on préfère associer quatre plis de faible grammage 15g/m2 plutôt que trois plis de 20g/m2. On allie ainsi une bonne résistance en usage et une douceur au toucher. On constate cependant que la résistance au délaminage, notamment celle du pli extérieur correspondant au deuxième pli de la bande 110 ci-dessus, n'est pas satisfaisante pour les produits à quatre plis.To make a tissue paper eg 60g / m 2 , it is preferred to combine four plies of light weight 15g / m 2 rather than three plies of 20g / m 2 . This combines good resistance in use and softness to the touch. However, it is noted that the delamination resistance, in particular that of the outer ply corresponding to the second ply of the strip 110 above, is not satisfactory for the products with four plies.

On constate aussi que ce mode de collage ne permet pas de doser aisément la quantité de colle à appliquer pour la formation de la liaison de manière à en apporter une quantité juste suffisante pour lier les plis entre eux sans trop rigidifier le mouchoir.It is also noted that this method of gluing does not make it easy to dose the amount of glue to be applied for the formation of the connection so as to provide an amount just sufficient to bind the plies between them without too much stiffen the handkerchief.

On est ainsi conduit à maintenir la pression spécifique exercée par le deuxième cylindre de pression à un niveau élevé. Cela présente non seulement un problème sur le plan industriel mais aussi sur la qualité du produit ; en effet, en gaufrant fortement la feuille par le deuxième cylindre, on obtient un produit qui présente un envers moins doux.It is thus necessary to maintain the specific pressure exerted by the second pressure cylinder at a high level. This presents not only a problem on the industrial level but also on the quality of the product; indeed, by strongly embossing the sheet by the second cylinder, a product is obtained which has a softer reverse.

La demanderesse a obtenu par ailleurs un brevet, EP 567 604 , sur un procédé d'impression gaufrage de feuilles d'ouate de cellulose à deux plis ou davantage selon lequel l'impression d'un des plis est effectuée directement sur le cylindre de gaufrage au moyen d'un ou plusieurs groupes d'impression installés sur les unités de gaufrage et ce pli est associé à un autre pli gaufré et encollé pour former une feuille de telle sorte que les pigments d'impression se trouvent sur la face interne de la feuille entre les deux ou plusieurs plis. La figure 2 reproduit une des figures du brevet EP 567 604 . Un pli de papier tissue 101 se déplace depuis une bobine mère en passant autour d'un cylindre de pression en caoutchouc 102 puis est appliqué et gaufré sur un premier cylindre de gaufrage 104. Le pli est encollé par un groupe d'encollage 105. Un second pli de papier tissue 107 se déplace en passant autour d'un cylindre de pression 110, et est gaufré sur un deuxième cylindre de gaufrage 112 en acier ou autre matériau équivalent. Une unité d'impression 113 (contenant des pigments) imprime le papier tissue 107 au niveau du deuxième cylindre de gaufrage 112. Les deux plis 101 et 107 sont ensuite assemblés en passant ensemble entre le premier cylindre de gaufrage 104 et un cylindre marieur 117. L'assemblage est ici de type « nested », c'est à dire que les protubérances formées sur le pli 101 s'emboîtent entre les protubérances formées sur le pli 107. L'avantage de la solution exposée dans ce brevet est de confiner les pigments entre les deux plis et de synchroniser le motif d'impression avec le motif de gaufrage.The plaintiff also obtained a patent, EP 567 604 on a process for embossing two or more ply cellulose wadding sheets in which the printing of one of the plies is performed directly on the embossing roll by means of one or more printing groups installed on the embossing units and this fold is associated with another embossed and glued fold to form a sheet so that the printing pigments are on the inner face of the sheet between the two or more folds. The figure 2 reproduced one of the figures of the patent EP 567 604 . A fold of tissue paper 101 moves from a master spool passing around a rubber pressure roll 102 and is then applied and embossed on a first embossing roll 104. The fold is glued by a sizing group 105. second fold of tissue paper 107 moves around a pressure cylinder 110, and is embossed on a second embossing cylinder 112 of steel or other equivalent material. A printing unit 113 (containing pigments) prints the tissue paper 107 at the second embossing roll 112. The two folds 101 and 107 are then assembled by passing together between the first embossing roll 104 and a match roll 117. The assembly here is of the "nested" type, that is to say that the protuberances formed on the fold 101 fit between the protuberances formed on the fold 107. The advantage of the solution disclosed in this patent is to confine the pigments between the two plies and to synchronize the print pattern with the embossing pattern.

La demanderesse a également développé un procédé de fabrication de produits en format ayant un bord périphérique et un motif d'impression. Selon ce procédé, tel que décrit dans le brevet EP 684 132 , on applique de la colle sur un premier pli le long d'un motif de collage défini pour former un joint le long du bord du produit, on applique un deuxième pli de papier sur le premier de façon à former une liaison partielle, on dirige l'ensemble vers un poste d'impression où il est imprimé sur l'une de ses surfaces et on achève la liaison par une étape de gaufrage. Ce procédé permet de réaliser des produits de belle qualité d'impression grâce à la liaison préalable des plis entre eux mais il ne permet pas d'imprimer des plis séparément.The Applicant has also developed a method of manufacturing products in format having a peripheral edge and a printing pattern. According to this process, as described in the patent EP 684 132 glue is applied to a first ply along a defined glue pattern to form a seal along the edge of the product, a second ply of paper is applied to the first to form a partial bond, the assembly to a printing station where it is printed on one of its surfaces and the connection is completed by an embossing step. This process makes it possible to produce products of good print quality thanks to the prior binding of the folds to one another, but it does not make it possible to print folds separately.

La demanderesse s'est fixé comme objectif la réalisation de produits découpés en formats du type mouchoir ou bien serviette d'au moins trois plis, combinant les avantages d'une bonne association des plis et de motifs de décoration pouvant être variés, et éventuellement colorés différemment sur les deux faces des produits.The applicant has set as its goal the production of cut products in tissues of the type handkerchief or towel of at least three folds, combining the advantages of a good combination of plies and decoration patterns that can be varied, and possibly colored differently on both sides of the products.

On parvient à cet objectif conformément à l'invention avec un procédé de fabrication d'un produit cellulosique fibreux multiplis découpé en format, comprenant les étapes selon lesquelles :

  • on applique au moins un pli de matériau cellulosique fibreux sur un cylindre présentant des reliefs et on le gaufre sur le cylindre au moyen d'un premier cylindre de pression,
  • on dépose de la colle sur des premières zones en relief formées sur le pli,
  • on applique au moins un deuxième pli sur le premier pli,
caractérisé par le fait qu'il comprend également les étapes selon lesquelles,
  • on entraîne un troisième pli autour d'un deuxième cylindre,
  • on dépose de la colle sur le troisième pli,
  • on applique le troisième sur le deuxième pli, et
  • on assemble les trois plis au moyen d'un deuxième cylindre de pression en appui contre le premier cylindre de gaufrage.
This object is achieved in accordance with the invention with a method of manufacturing a size-cut, multiply-cut cellulosic fibrous product comprising the steps of:
  • at least one ply of fibrous cellulosic material is applied to a cylinder having reliefs and is waffed on the cylinder by means of a first pressure cylinder,
  • depositing glue on first raised areas formed on the fold,
  • at least one second fold is applied to the first fold,
characterized in that it also comprises the steps according to which
  • we draw a third fold around a second cylinder,
  • we put glue on the third fold,
  • we apply the third on the second fold, and
  • the three plies are assembled by means of a second pressure cylinder bearing against the first embossing cylinder.

L'invention présente le double avantage recherché. Elle permet d'associer le dernier pli aux autres de manière efficace par le deuxième encolleur, tout en permettant, par le motif du deuxième cylindre, d'apporter un décor supplémentaire sur la face arrière du produit final. Les avantages induits par le procédé sont aussi l'obtention d'un produit dont l'envers est bien lisse car il n'est pas nécessaire d'exercer une pression importante par le deuxième cylindre de pression.The invention has the double advantage sought. It makes it possible to associate the last fold with the others effectively by the second glue, while allowing, by the pattern of the second cylinder, to bring an additional decoration on the rear face of the final product. The advantages induced by the process are also to obtain a product whose backside is smooth because it is not necessary to exert significant pressure by the second pressure cylinder.

Par ailleurs, le produit reste souple malgré un dépôt de colle sur une surface importante du produit.Moreover, the product remains flexible despite a deposit of glue on a large surface of the product.

Avantageusement, le deuxième cylindre peut être gravé selon un deuxième motif de gravure.Advantageously, the second cylinder can be etched according to a second etching pattern.

Conformément à un premier mode de réalisation du procédé, on dépose la colle sur le troisième pli au moyen d'un cylindre applicateur, sans gaufrage préalable du pli sur le deuxième cylindre. Cette solution permet de conserver au troisième pli son épaisseur et sa douceur initiales.According to a first embodiment of the method, the glue is deposited on the third fold by means of an applicator roll, without prior embossing of the fold on the second roll. This solution keeps the third fold its initial thickness and softness.

Conformément à un second mode de réalisation, on dépose la colle sur le troisième pli au moyen d'un cylindre applicateur la feuille ayant été gaufrée au préalable sur le deuxième cylindre. Cette solution permet de varier les motifs au cas où certains ne seraient pas imprimés de manière satisfaisante sans gaufrage. De préférence dans ce cas, on procède de telle façon que le gaufrage conduit à la formation de protubérances sur le troisième pli de faible hauteur, en particulier inférieure à 0,1mm.According to a second embodiment, the glue is deposited on the third fold by means of an applicator roll the sheet having been previously embossed on the second roll. This solution allows to vary the patterns in case some would not be printed satisfactorily without embossing. Preferably in this case, it proceeds in such a way that the embossing leads to the formation of protuberances on the third fold of low height, in particular less than 0.1mm.

Conformément à une autre caractéristique, le premier cylindre est gravé selon un motif représentant la périphérie d'un produit découpé au format.According to another feature, the first cylinder is etched in a pattern representing the periphery of a product cut in the format.

Conformément à une autre caractéristique, au moins la colle appliquée sur le troisième pli est colorée. Ainsi, le motif correspondant à la surface encollée est bien visible sur le produit fini.According to another characteristic, at least the glue applied to the third fold is colored. Thus, the pattern corresponding to the glued surface is clearly visible on the finished product.

Conformément à une caractéristique, le deuxième cylindre de pression présente une dureté supérieure à celle du premier cylindre.According to one characteristic, the second pressure cylinder has a hardness greater than that of the first cylinder.

On décrit ci-après un mode de réalisation préféré, mais non limitatif de l'invention en référence aux dessins sur lesquels :

  • la figure 1 représente une installation conforme à l'art antérieur pour la réalisation de produits découpés au format, avec collage des bords,
  • la figure 2 représente une installation telle que décrite dans le brevet EP 567604 pour l'impression de produits à au moins deux plis et gaufrés,
  • la figure 3 représente une installation pour la mise en oeuvre d'un procédé selon l'invention,
  • la figure 4 représente un produit obtenu conformément à l'invention.
A preferred, but not limitative, embodiment of the invention is described below with reference to the drawings in which:
  • the figure 1 represents an installation according to the prior art for the production of products cut to size, with edge gluing,
  • the figure 2 represents an installation as described in the patent EP 567604 for the printing of products with at least two folds and embossed,
  • the figure 3 represents an installation for implementing a method according to the invention,
  • the figure 4 represents a product obtained according to the invention.

En se reportant à la figure 3, on voit une installation qui permet l'assemblage de bandes d'ouate de cellulose, par exemple de grammage compris entre 12 et 40 g/m2, en une feuille continue à plusieurs plis. Après assemblage, cette feuille est ensuite guidée vers un autre poste où elle peut être découpée en formats, et transformée en serviette ou mouchoirs.Referring to the figure 3 , we see an installation that allows the assembly of cellulose wadding strips, for example of grammage between 12 and 40 g / m 2 , into a continuous sheet with several plies. After assembly, this sheet is then guided to another post where it can be cut into formats, and transformed into napkins or tissues.

Une première feuille (ou pli) 201 d'ouate de cellulose, simple ou double, est guidée depuis une bobine mère non représentée, jusqu'à une unité de gaufrage comprenant un premier cylindre gravé 210 et un premier cylindre de pression 212 en caoutchouc ou autre matériau à la dureté adaptée. La feuille est gaufrée par passage dans l'intervalle de pincement ménagé entre les deux cylindres 210 et 212. La feuille est plaquée contre le premier cylindre 210 dont elle épouse le relief. Pour la fabrication de produits tels que des mouchoirs ou des serviettes, la gravure sur le premier cylindre 210 forme par exemple des bandes disposées en carré ou en rectangle à la manière de cadres d'une largeur déterminée, comme cela est rapporté dans le brevet de la demanderesse EP 684132 .A first sheet (or ply) 201 of cellulose wadding, single or double, is guided from a reel not shown, to an embossing unit comprising a first engraved cylinder 210 and a first pressure cylinder 212 of rubber or other material with the appropriate hardness. The sheet is embossed by passing through the nip between the two cylinders 210 and 212. The sheet is pressed against the first cylinder 210 which it matches the relief. For the manufacture of products such as tissues or towels, the engraving on the first cylinder 210 forms, for example, strips arranged in a square or rectangle in the manner of frames of a determined width, as reported in the applicant's patent EP 684132 .

En aval du premier cylindre de pression 212, une unité d'encollage 214 comprenant un cylindre applicateur 214' dépose de la colle, à base aqueuse de préférence telle qu'une colle polyvinylique, sur les parties en relief de la feuille plaquée contre le cylindre 210 et dont elle épouse la forme. En poursuivant sa rotation, le cylindre amène ensuite la feuille 201 à une zone où elle est accostée par une deuxième feuille (ou pli) 202, alimentée depuis une deuxième bobine mère par exemple de papier tissue. La feuille 202 est elle-même accostée par une troisième feuille 203 de papier tissue, sur son autre face. Cette feuille 203 est aussi issue d'une bobine mère non représentée. La troisième feuille 203 est guidée autour d'un deuxième cylindre 215 dont l'axe est coplanaire avec celui du premier cylindre gravé 210, et comportant en surface un motif de type motif d'impression. Le deuxième cylindre 215 n'exerce de préférence pas de pression sur le premier cylindre 210. La troisième feuille 203, de préférence à un seul pli, est encollée par une deuxième unité d'encollage 216 lorsqu'elle est en contact avec le cylindre 215. Sur la figure 3, on voit que la feuille 203 n'est pas soumise à la pression d'un cylindre de pression avant son passage entre la deuxième unité d'encollage 216 et le deuxième cylindre graveur 215.Downstream of the first pressure cylinder 212, a sizing unit 214 comprising an applicator roll 214 'deposits glue, preferably water based such as a polyvinyl glue, on the raised parts of the sheet pressed against the cylinder. 210 and whose form she marries. By continuing its rotation, the cylinder then brings the sheet 201 to an area where it is accosted by a second sheet (or fold) 202, fed from a second reel for example of tissue paper. The sheet 202 is itself accosted by a third sheet 203 of tissue paper, on its other side. This sheet 203 is also derived from a mother reel not shown. The third sheet 203 is guided around a second cylinder 215 whose axis is coplanar with that of the first engraved cylinder 210, and having on the surface a printing pattern type pattern. The second cylinder 215 preferably does not exert pressure on the first cylinder 210. The third sheet 203, preferably a single ply, is glued by a second gluing unit 216 when in contact with the cylinder 215 . On the figure 3 it can be seen that the sheet 203 is not subjected to the pressure of a pressure cylinder before it passes between the second gluing unit 216 and the second engraving cylinder 215.

La pression exercée par le cylindre encolleur(non référencé)de la deuxième unité d'encollage 216 suffit à transférer la colle sur les parties de la troisième feuille 203 supportée par le motif d'impression gravé sur le deuxième cylindre 215.The pressure exerted by the gluing cylinder (not referenced) of the second gluing unit 216 is sufficient to transfer the glue to the portions of the third sheet 203 supported by the print pattern etched on the second cylinder 215.

La colle peut être avantageusement colorée afin que le motif soit visible sur le produit fini.The glue can be advantageously colored so that the pattern is visible on the finished product.

La troisième feuille 203 accoste la feuille 202 dans la zone formant l'intervalle entre les premier (210) et deuxième (215) cylindres. Les trois feuilles 201, 202 et 203 ainsi superposées sont ensuite soumises à la pression d'un cylindre marieur 218 disposé en aval, et les feuilles sont liées entre elles à ce niveau.The third sheet 203 accost the sheet 202 in the region forming the gap between the first (210) and second (215) cylinders. The three sheets 201, 202 and 203 thus superimposed are then subjected to the pressure of a marrying cylinder 218 disposed downstream, and the sheets are bonded together at this level.

On observe que le motif gravé sur le deuxième cylindre 215 comprend de préférence une zone qui chevauche au moins partiellement le motif gravé sur le premier cylindre gravé 210 afin que la colle apportée par la deuxième unité d'encollage 216 participe efficacement à la liaison du troisième pli 203 sur le deuxième pli 202. La quantité de colle apportée par l'encolleur 216 n'a alors pas besoin d'être importante ; il suffit qu'elle permette la liaison du deuxième pli 202 au troisième pli 203.It is observed that the pattern engraved on the second cylinder 215 preferably comprises a zone which overlaps at least partially the pattern engraved on the first engraved cylinder 210 so that the glue provided by the second sizing unit 216 effectively participates in the connection of the third fold 203 on the second fold 202. The amount of glue provided by the glue 216 then need not be important; it suffices that it allows the connection of the second fold 202 to the third fold 203.

On observe aussi que dans ce cas le cylindre marieur 218 n'a plus besoin d'exercer une pression importante sur la feuille multiplis car la colle n'a pas à traverser l'épaisseur d'un pli pour assurer la liaison des plis.It is also observed that in this case the marrying cylinder 218 no longer needs to exert a significant pressure on the plywood sheet because the glue does not have to cross the thickness of a fold to ensure the binding of the plies.

De préférence la dureté du cylindre marieur 218 est supérieure à celle du premier cylindre de pression 212. A titre illustratif, le premier cylindre de gaufrage peut présenter une dureté de 60 shore tandis que celle du cylindre de pression de 55 shore.Preferably the hardness of the marrying cylinder 218 is greater than that of the first pressure cylinder 212. As an illustration, the first embossing cylinder may have a hardness of 60 shore while that of the pressure cylinder of 55 shore.

On comprend que ce mode de réalisation permet aussi de varier aisément le motif imprimé par le deuxième cylindre gravé 215. Les contraintes techniques pour réaliser un cylindre dit d'impression sont bien moindres que celles requises pour la réalisation d'un cylindre de gaufrage. En outre, il est beaucoup plus libre dans la mesure où il ne remplit aucune fonction technique liée notamment à la douceur, l'épaisseur ou la résistance à la rupture de la feuille.It is understood that this embodiment also makes it possible to easily vary the pattern printed by the second engraved cylinder 215. The technical constraints to make a so-called printing cylinder are much less than those required for the production of an embossing cylinder. In addition, it is much freer to the extent that it does not fulfill any technical function related in particular to the softness, the thickness or the breaking strength of the sheet.

Par ailleurs, sans sortir du cadre de l'invention, le deuxième cylindre 215 peut être lisse. Il coopère alors avec un cylindre de l'unité d'encollage 216 qui présente lui-même un motif en relief.Furthermore, without departing from the scope of the invention, the second cylinder 215 may be smooth. It then cooperates with a cylinder of the gluing unit 216 which itself has a raised pattern.

On note cependant que pour certains motifs, il peut être nécessaire de marquer la feuille avec le motif au préalable afin de permettre un transfert plus net de colle sur la feuille. Dans cette hypothèse, l'application d'une légère pression de gaufrage en amont du passage sous l'encolleur sera suffisante. Selon cette variante de l'invention, un cylindre de pression (non représenté) peut être prévu afin de réaliser un gaufrage en amont de l'encollage de la troisième feuille 203. Par exemple, la hauteur des protubérances formées par le motif sera inférieure à 0,1 mm.Note however that for some reasons, it may be necessary to mark the sheet with the pattern beforehand to allow a clearer transfer of glue on the sheet. In this case, the application of a slight embossing pressure upstream of the passage under the glue will be sufficient. According to this variant of the invention, a pressure cylinder (not shown) may be provided in order to perform an embossing upstream of the gluing of the third sheet 203. For example, the height of the protuberances formed by the pattern will be less than 0.1 mm.

Pour illustrer les possibilités offertes par le procédé, on a représenté sur la figure 4, un exemple de produits découpés conformes à l'invention avec une première face commune A et une face arrière dont les décors sont différents. Par exemple on a représenté quatre décors différents B1, B2, B3, B4, ces quatre décors pouvant être réalisés en des couleurs différentes B'1, B'2, B'3 et B'4.To illustrate the possibilities offered by the process, it is shown on the figure 4 an example of cut products according to the invention with a first common face A and a rear face whose decorations are different. For example, four different decorations B1, B2, B3, B4 have been represented, these four decorations being able to be made in different colors B'1, B'2, B'3 and B'4.

Claims (10)

  1. Method of manufacturing a multi-ply fibrous cellulosic product comprising the steps according to which:
    - at least one ply (201) of fibrous cellulosic material is applied to an embossing cylinder (210) having reliefs in a first pattern and is embossed on the cylinder (210) by means of a first pressure cylinder (212),
    - adhesive is deposited on first areas of the ply in relief,
    - at least a second ply (202) is applied to the first ply,
    characterised by the fact that it also comprises the steps according to which:
    - a third ply (203) is drawn around a second cylinder (215),
    - adhesive is deposited on the third ply (203), the third is applied to the second ply (202), and
    - the three plies (201, 202, 203) are assembled by means of a second pressure cylinder (218) in abutment against the first embossing cylinder (210).
  2. Method according to claim 1, according to which said second cylinder (215) is engraved in a second pattern.
  3. Method according to claim 1, according to which said second cylinder (215) is smooth and the adhesive is deposited on the third ply (203) by means of an applicator cylinder of a gluing unit (216) that has a pattern in relief.
  4. Method according to any one of the preceding claims, according to which the adhesive is deposited on the third ply (203) by means of an applicator cylinder of a gluing unit (216) without prior embossing of the ply on the second cylinder (215).
  5. Method according to any one of claims 1 to 3, according to which the adhesive is deposited on the third ply (203) by means of an applicator cylinder of a gluing unit, the sheet having been previously embossed on the second cylinder.
  6. Method according to the preceding claim, according to which the embossing on the third ply (203) leads to the formation of low protuberances, in particular less than 0.1 mm.
  7. Method according to one of the preceding claims, wherein the first cylinder (210) is engraved in a pattern representing the periphery of a product cut to format.
  8. Method according to claim 1, wherein at least the adhesive applied to the third ply (203) is coloured.
  9. Method according to one of the preceding claims, wherein the second pressure cylinder (218) has a hardness greater than that of the first pressure cylinder (212).
  10. Method according to any one of the preceding claims, characterised in that the product is cut in formats.
EP05290711A 2004-04-09 2005-03-31 Method for manufacturing a multi-ply fibrous cellulosic product Not-in-force EP1584458B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0403750A FR2868731B1 (en) 2004-04-09 2004-04-09 PROCESS FOR MANUFACTURING MULTIPLE FIBROUS CELLULOSIC PRODUCT
FR0403750 2004-04-09

Publications (2)

Publication Number Publication Date
EP1584458A1 EP1584458A1 (en) 2005-10-12
EP1584458B1 true EP1584458B1 (en) 2010-03-17

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Application Number Title Priority Date Filing Date
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EP (1) EP1584458B1 (en)
AT (1) ATE461035T1 (en)
DE (1) DE602005019937D1 (en)
ES (1) ES2342301T3 (en)
FR (1) FR2868731B1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2698314B1 (en) * 1992-11-24 1994-12-23 Kaysersberg Sa Laminated product in cellulose wadding.
FR2707311B1 (en) * 1993-07-09 1995-09-08 Kaysersberg Sa Multilayer embossed papers, device and procedure for their preparation.
FR2775698B1 (en) * 1998-03-06 2000-04-21 Fort James France NEW ABSORBENT PAPER PRODUCT COMPRISING THREE PLY AND MANUFACTURING METHOD THEREFOR
IT1307887B1 (en) * 1999-06-18 2001-11-19 Perini Fabio Spa EMBOSSING METHOD AND DEVICE FOR THE PRODUCTION OF MULTI-LEVEL STRUCTURAL MATERIALS, AND PRODUCT SO OBTAINED.
EP1081284B1 (en) * 1999-08-31 2008-01-02 Georgia-Pacific France Absorbent paper product comprising at least three plies, and process for making the same
IT1314877B1 (en) * 2000-11-22 2003-01-16 Perini Fabio Spa METHOD AND DEVICE FOR THE PRODUCTION OF A MULTIPLE-SHEET PAPER MATERIAL AND PRODUCT SO OBTAINED

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Publication number Publication date
ATE461035T1 (en) 2010-04-15
ES2342301T3 (en) 2010-07-05
FR2868731A1 (en) 2005-10-14
FR2868731B1 (en) 2006-06-02
DE602005019937D1 (en) 2010-04-29
EP1584458A1 (en) 2005-10-12

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