EP1159487B3 - Absorbent paper product comprising two or three plies - Google Patents

Absorbent paper product comprising two or three plies Download PDF

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Publication number
EP1159487B3
EP1159487B3 EP00900524A EP00900524A EP1159487B3 EP 1159487 B3 EP1159487 B3 EP 1159487B3 EP 00900524 A EP00900524 A EP 00900524A EP 00900524 A EP00900524 A EP 00900524A EP 1159487 B3 EP1159487 B3 EP 1159487B3
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EP
European Patent Office
Prior art keywords
protuberances
embossed
product
plies
ply
Prior art date
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Expired - Lifetime
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EP00900524A
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German (de)
French (fr)
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EP1159487A1 (en
EP1159487B1 (en
Inventor
Gilles Roussel
Pierre Laurent
Rémy Ruppel
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Essity Operations France SAS
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Georgia Pacific France SAS
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Application filed by Georgia Pacific France SAS filed Critical Georgia Pacific France SAS
Priority to DE60000977.7T priority Critical patent/DE60000977T3/en
Publication of EP1159487A1 publication Critical patent/EP1159487A1/en
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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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/30—Multi-ply
    • D21H27/40—Multi-ply at least one of the sheets being non-planar, e.g. crêped
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1007—Running or continuous length work
    • Y10T156/1023—Surface deformation only [e.g., embossing]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
    • Y10T428/24446—Wrinkled, creased, crinkled or creped
    • Y10T428/24455—Paper
    • Y10T428/24463—Plural paper components
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y10T428/24562—Interlaminar spaces
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y10T428/24612—Composite web or sheet

Definitions

  • the present invention relates to absorbent paper products and more particularly cellulose wadding for sanitary or domestic use and aims a sheet consisting of at least two plies, one of which is embossed for the realization of toilet paper.
  • cellulose wadding or wadded fabric In the sanitary and domestic paper industry, use is made, for the production of these products, of a generally creped absorbent paper of slight weight, designated: cellulose wadding or wadded fabric. It takes advantage of the capacity of elongation of the structure conferred for example by creping to emboss the sheet, that is to say permanently deform in places and obtain protrusions on a face corresponding to recessed areas on the other side.
  • the present invention relates to paper converted into dry part.
  • embossing patterns consist of a repetition on a geometric basis of elementary protuberances of small cross section and simple geometric shape.
  • An example is described in the patent US-A-3,414,459 which relates to a sheet with two or three plies, ie consisting of a plurality of elementary sheets, called folds, bound or glued together.
  • the plies are embossed with a frequency of distribution of the protuberances and a height of the protuberances adapted to the production of water-absorbing products such as essule-tout, the number of elements ranging from 5 to 30 cm 2 .
  • the Applicant has developed, for toilet paper in particular, patterns whose number of elements is greater, ranging from 30 to 80 cm 2 .
  • absorbent paper products consist of two plies but obtained according to a different association technique.
  • a fold or a set of two superposed folds is waffled and, on the other hand, a second fold by means of two distinct embossing devices.
  • the first fold and the second fold are embossed in relief patterns consisting of protuberances.
  • the density of patterns necessarily remains low: less than 20 protuberances / cm 2 for this type of product.
  • the two plies are associated by means of a marrying cylinder so that the distal surfaces of the protuberances of the two superimposed folds are disposed opposite the surfaces between two protuberances in the plane of the second fold. This technique is still called “nested" process.
  • the two plies are waffled. If the embossing brings thickness to each of the folds, however, it causes a significant reduction in its resistance to breakage. Indeed, the mechanical work on the sheet is accompanied by a loosening of interfiber bonds in the embossed areas.
  • the invention thus has for first objective the production of a double sheet whose breaking strength is improved compared to a double embossed sheet of the same thickness.
  • the second object of the invention is the production of a double sheet whose thickness and / or visibility of the embossing pattern is improved with respect to a double embossed sheet of the prior art while having a good breaking strength. .
  • a toilet paper satisfying one or the other of the two objectives referred to above consisting of two plies of cellulose wadding of weight 10 to 40 g / m 2 each one of which is embossed with relief patterns, consisting at least in part of discrete protuberances oriented towards the inside of the sheet, and the other being unembossed, is characterized in that the embossed ply has at least 30% of the total area at the minus 30 and less than 90 protuberances per cm 2 , the top surface of which is less than 1 mm 2 , preferably less than 0.7 mm 2 .
  • a double sheet thus characterized has the same thickness as a double sheet made with two embossed folds in the same manner as the embossed ply of the invention and assembled in spikes point position.
  • the surface at the top of the protuberances is even weaker as the number of these latter is locally high. It is preferably less than 0.7 mm 2 for 30 protuberances per cm 2 and preferably less than or equal to 0.4 mm 2 for 50 protuberances per cm 2 .
  • thickness in the present technical field is meant the thickness measured on a stack of a certain number of sheets (12-ply for example) on which a slight pressure (2 kPa for example) is applied. It follows that the thickness takes into account a certain resistance to crushing of the structure. Thus without wishing to be bound by an explanation, the preservation of the thickness of the structure of the invention results from the better crush resistance of a ply which has been embossed with a high density pattern.
  • the product according to the invention has at least 50% of the total surface area at least 30 protuberances per cm 2 .
  • the number of protuberances is at least 50 per cm 2 .
  • the product has a second embossing pattern between said surface portions.
  • this pattern may be of linear type, ie consisting of protuberances whose surface at the apex is of linear shape.
  • the product 1 according to the invention comprises two plies, an embossed ply 2, and a non-embossed or smooth ply 4.
  • the embossed ply comprises protuberances 11 distributed at a fixed constant pitch over a surface portion.
  • the protuberances of the embossed ply are oriented towards the inside.
  • the two plies are preferably linked together. In particular, they can be linked together at the distal surfaces of the protuberances of the embossed fold.
  • the two plies are linked by gluing
  • the product according to the invention has a basis weight of about 20 to 80 g / m 2 .
  • Each of the plies is made of cellulose wadding.
  • Cellulose wadding is a creped paper of low basis weight between 10 and 40 g / cm 2 which has been dried on a heated cylinder and from which it has been detached by means of a metal blade, called a creping blade.
  • the embossed ply On surface portions together representing at least 30% of the total area, the embossed ply has a pattern density greater than 30 protuberances / cm 2 and a density less than 90 protuberances / cm 2 . It can also present in addition one or more types of different patterns and whose pattern densities are different. The protuberances can then be of different height, and the fold has patterns of different levels.
  • European patent applications EP-A-0 426 548 and EP-A-0 797 705 illustrate embossed products according to these principles but having two embossed folds.
  • the second ply is not embossed.
  • the fibrous and / or chemical composition of the plies may be the same or different.
  • the unembossed ply may have a fibrous composition essentially based on long fibers such as resin fibers, and the embossed ply, a fibrous composition essentially based on short fibers. This combination makes it possible to obtain a more resistant product without sacrificing the softness provided by the short fibers.
  • the non-embossed ply may comprise a temporary or possibly permanent wet resistant additive. If this additive is already present in a certain amount in the embossed fold, the non-embossed fold may contain a larger amount.
  • a wet-resistant additive is a compound of the polyamine epichlorohydrin type, marketed under the name KYMENE SLX by the company HERCULES.
  • the embossed fold can mean a softener or debinding.
  • the sheet thus formed has a very good wet strength and therefore good strength, in particular because of the composition of the non-embossed ply. It also offers a softness of surface by the choice of the fibrous and chemical composition of the embossed fold.
  • Each fold may further consist of one or more layers forming a laminate.
  • the layers in this case may also have a different fibrous and / or chemical composition.
  • the sheet is represented with the two folds 2 and 4 superimposed. They are arranged so that the protuberances are inside the sheet.
  • the two plies can be bonded to each other in any manner known to those skilled in the art, such as, for example, mechanically by knurling, that is to say by passing the sheet between a wheel and a smooth counter cylinder.
  • the two plies are bonded to one another by means of an adhesive substance interposed between the vertices of the protuberances of the folds represented which come into contact.
  • the adhesive substance is then preferably deposited on the highest vertices of the elements of the pattern, and is advantageously colored in order to bring out the details.
  • a first embossing cylinder 10 has been etched in a pattern with spikes of a shape adapted to the desired protuberances.
  • the method consists of embossing a fold of cellulose wadding 20 unwound from a not shown reel, between the embossing roll 10 and a rubber roll 12 and then coming together by means of a marrying roll 14 a fold non-embossed cellulose wadding 40, also unwound from a not shown spool, on the first 20 while it is still in contact with the embossing roll.
  • the adhesive substance preferably water-based, has been applied to the tops of the embossed fold by means of a sizing roll 16.
  • the products according to the invention have very advantageous characteristics compared to products consisting of two plies existing on the market.
  • Example A the pattern is one currently sold under the trademark LOTUS and comprises 80 protuberances per cm 2. The surface at the top of these is less than 0.4 mm 2 . The standard product is then associated in point / tip mode.
  • the pattern is composed of surface protuberances at the apex also less than 1 mm 2 . They are distributed in alignments along which the pattern density is greater than 30 protuberances per cm 2 , the alignments being separated from each other with sufficient spacing to allow assembly in the nested position.
  • the average density is 15 p / cm 2 .
  • Example C the pattern is the same as for B but the embossing specific pressure was higher. This gives a higher thickness than for the standard product assembled in "nested".
  • Standard 1 Invention 2 Standard 3 Invention 4 Number of folds per sheet. 2 2 2 2 Weight of the sheet in g / m 2 . 32.3 32.1 44 43.8 O) Control sheet made with two non-embossed folds Thickness in mm 0.19 0.19 0.31 0.31 Resistance in N / m: Sense through ST 92 90 76 74 SM walking direction 174 158 214 216 Elongation 27% 27% 34% 33%
  • Transformation of two plies embossing pattern with 80p / cm 2 and assembly points / points for the standard product.
  • an embossed product was produced with a pattern consisting of protuberances on the engraved cylinder 1.3 mm high, at a rate of 7 per cm 2 .
  • the standard method with "nested" assembly of the two embossed folds gives a sheet thickness of 0.28 mm for a cross-directional strength of 80 N / m.
  • a product with a single embossed fold has a thickness loss of nearly 20% even if there is a slight increase in resistance, less than 9%. By increasing the pressure, a similar thickness will only be obtained at the cost of a strongly degraded resistance.
  • an engraved cylinder 10 having first pins and second pins is used.
  • the first pins are distributed in a first pattern having on at least one surface portion at least 30 pins per cm 2 , and preferably 50 pins per cm 2 .
  • the second pins are distributed in a second pattern, the number of second pins is lower.
  • the vertices of the second spikes are at a higher level than those of the first spikes.
  • the second protuberances of the fold 20 formed on the cylinder 10 receive the glue of the gluing cylinder 16.
  • the connection with the non-embossed fold 40 is thus provided by the second protuberances.
  • a second non-embossed ply 40 ' represented by an arrow on the spindle, is introduced between the cylinder 10 thus etched and the marrying roll 14. figure 2 .

Abstract

The invention concerns an absorbent paper product with a basic weight ranging from about 20 to 80 g/m<2 >comprising an embossed ply including raised designs consisting at least partly of discrete protuberances oriented inwards of the structure and a non-embossed ply. The invention is characterised in that the embossed ply has at least over part of its surface at least 30 protuberances per cm<2 >whereof the top surface area is less than 1 mm<2 >preferably less than 0.7 mm<2>.

Description

La présente Invention concerne les produits en papier absorbant et plus particulièrement en ouate de cellulose, à usage sanitaire ou domestique et vise une feuille constituée d'au moins deux plis dont l'un est gaufré destinée à la réalisation de papier toilette.The present invention relates to absorbent paper products and more particularly cellulose wadding for sanitary or domestic use and aims a sheet consisting of at least two plies, one of which is embossed for the realization of toilet paper.

Dans l'industrie du papier sanitaire et domestique, on utilise, pour la réalisation de ces produits, un papier absorbant généralement crêpé de faible grammage, désigné : ouate de cellulose ou tissu ouaté. On profite de la capacité d'allongement de la structure conférée par exemple par le crêpage pour gaufrer la feuille, c'est-à-dire la déformer par endroits de façon permanente et obtenir des protubérances sur une face correspondant à des zones en creux sur l'autre face.In the sanitary and domestic paper industry, use is made, for the production of these products, of a generally creped absorbent paper of slight weight, designated: cellulose wadding or wadded fabric. It takes advantage of the capacity of elongation of the structure conferred for example by creping to emboss the sheet, that is to say permanently deform in places and obtain protrusions on a face corresponding to recessed areas on the other side.

En effet, la tendance de ces dernières années, en ce qui concerne les produits d'hygiène a été de les rendre plus doux, plus moelleux en travaillant leurs caractéristiques d'épaisseur et de résistances, notamment par le gaufrage.
Ce dernier permet en outre d'améliorer l'attrait visuel du produit. La présente invention concerne le papier transformé en partie sèche.Indeed, the trend in recent years, in terms of hygiene products has been to make them softer, softer by working their characteristics of thickness and strength, including embossing.
The latter also makes it possible to improve the visual appeal of the product. The present invention relates to paper converted into dry part.

Les motifs de gaufrage les plus répandus sont constitués d'une répétition sur une base géométrique de protubérances élémentaires de faible section transversale et de forme géométrique simple. Un exemple est décrit dans le brevet US-A-3 414 459 qui porte sur une feuille à deux ou trois plis, c'est à dire constituée d'une pluralité de feuilles élémentaires, appelées plis, liées ou collées ensemble. Les plis sont gaufrés avec une fréquence de répartition des protubérances et une hauteur des protubérances adaptées à la réalisation de produits absorbant l'eau tels que des essule-tout, le nombre d'éléments allant de 5 à 30 au cm2. Par ailleurs, la Demanderesse a développé, pour du papier toilette notamment, des motifs dont le nombre d'éléments est supérieur, allant de 30 à 80 au cm2. Dans ce cas, en raison de leur nombre, ces éléments forment des protubérances de hauteur plus faible et ont nécessairement une surface élémentaire au sommet également très faible, inférieure à 1 mm2. On obtient pour ces dernières réalisations un aspect qui imite celui d'un produit tissé. On a décrit un exemple dans le brevet EP-A-26 548 . Ce type de gaufrage affecte principalement les caractéristiques liées à l'épaisseur de la feuille, d'une part, et à sa rigidité et sa résistance, d'autre part. Ces motifs permettent de réaliser un bon compromis entre les améliorations souhaitées des caractéristiques lorsque l'on transforme le produit semi-fini en produit fini, et les conditions de marche industrielle ; ils permettent, notamment, l'application d'une Intensité de gaufrage suffisante. Ils présentent toutefois un attrait visuel limité.The most widespread embossing patterns consist of a repetition on a geometric basis of elementary protuberances of small cross section and simple geometric shape. An example is described in the patent US-A-3,414,459 which relates to a sheet with two or three plies, ie consisting of a plurality of elementary sheets, called folds, bound or glued together. The plies are embossed with a frequency of distribution of the protuberances and a height of the protuberances adapted to the production of water-absorbing products such as essule-tout, the number of elements ranging from 5 to 30 cm 2 . Moreover, the Applicant has developed, for toilet paper in particular, patterns whose number of elements is greater, ranging from 30 to 80 cm 2 . In this case, because of their number, these elements form protuberances of lower height and necessarily have an elementary surface at the top also very low, less than 1 mm 2 . For these last embodiments, an aspect is obtained which mimics that of a woven product. An example has been described in the patent EP-A-26,548 . This type of embossing mainly affects the characteristics related to the thickness of the sheet, on the one hand, and its rigidity and strength, on the other hand. These patterns make it possible to achieve a good compromise between the desired improvements in the characteristics when converting the semi-finished product into a finished product, and the industrial operating conditions; they allow, in particular, the application of a sufficient embossing intensity. However, they have a limited visual appeal.

D'autres produits en papier absorbant sont constitués de deux plis mais obtenus suivant une technique d'association différente. On gaufre d'une part un pli ou un ensemble de deux plis superposés et d'autre part un deuxième pli au moyen de deux dispositifs distincts de gaufrage. Le premier pli ainsi que le deuxième pli sont gaufrés selon des motifs en relief constitués de protubérances. La densité de motifs reste nécessairement faible: inférieure à 20 protubérances/cm2 pour ce type de produit. En effet les deux plis sont associés au moyen d'un cylindre marieur de manière que les surfaces distales des protubérances des deux plis superposés soient disposées en face des surfaces situées entre deux protubérances dans le plan du deuxième pli. Cette technique est encore appelée procédé « nested ». Avec une structure de ce type on cherche à obtenir des produits épais ayant une bonne main. Cependant, surtout pour l'application au papier toilette, la douceur n'est pas optimale en raison du gaufrage relativement grossier. En outre, il est nécessaire de gaufrer fortement pour obtenir l'épaisseur importante souhaitée.Other absorbent paper products consist of two plies but obtained according to a different association technique. On one hand, a fold or a set of two superposed folds is waffled and, on the other hand, a second fold by means of two distinct embossing devices. The first fold and the second fold are embossed in relief patterns consisting of protuberances. The density of patterns necessarily remains low: less than 20 protuberances / cm 2 for this type of product. Indeed the two plies are associated by means of a marrying cylinder so that the distal surfaces of the protuberances of the two superimposed folds are disposed opposite the surfaces between two protuberances in the plane of the second fold. This technique is still called "nested" process. With a structure of this type one seeks to obtain thick products having a good hand. However, especially for the application to toilet paper, the softness is not optimal because of the relatively coarse embossing. In addition, it is necessary to emboss strongly to obtain the desired large thickness.

Dans l'un et l'autre mode de réalisation d'une feuille double, on gaufre les deux plis. Si le gaufrage apporte de l'épaisseur à chacun des plis il entraîne cependant une réduction sensible de sa résistance à la rupture. En effet, le travail mécanique sur la feuille s'accompagne d'un relâchement des liaisons interfibres dans les zones gaufrées.In one and the other embodiment of a double sheet, the two plies are waffled. If the embossing brings thickness to each of the folds, however, it causes a significant reduction in its resistance to breakage. Indeed, the mechanical work on the sheet is accompanied by a loosening of interfiber bonds in the embossed areas.

L'invention a ainsi pour premier objectif la réalisation d'une feuille double dont la résistance à la rupture est améliorée par rapport à une feuille double gaufrée de même épaisseur.The invention thus has for first objective the production of a double sheet whose breaking strength is improved compared to a double embossed sheet of the same thickness.

Inversement, en augmentant la pression de gaufrage on accroît l'épaisseur de la feuille et/ou la qualité du marquage du motif de gaufrage mais on est limité par la nécessité de ne pas induire une perte en résistance à la rupture trop importante.Conversely, increasing the embossing pressure increases the thickness of the sheet and / or the quality of the embossing pattern marking but is limited by the need not to induce excessive loss of resistance to breakage.

L'invention a pour second objectif la réalisation d'une feuille double dont l'épaisseur et/ou la visibilité du motif de gaufrage est améliorée par rapport à une feuille double gaufrée de l'art antérieur tout en présentant une bonne résistance à la rupture.The second object of the invention is the production of a double sheet whose thickness and / or visibility of the embossing pattern is improved with respect to a double embossed sheet of the prior art while having a good breaking strength. .

Conformément à l'invention un papier toilette satisfaisant à l'un ou l'autre des deux objectifs visés ci-dessus, constituée de deux plis d'ouate de cellulose de grammage 10 à 40 g/m2 chacun dont l'un est gaufré avec des motifs en relief, consistant au moins en partie de protubérances discrètes orientées vers l'intérieur de la feuille, et l'autre est non gaufré, est caractérisée en ce que le pli gaufré présente sur au moins 30% de la surface totale au moins 30 et moins de 90 protubérances par cm2 dont la surface au sommet est inférieure à 1 mm2, de préférence inférieure à 0,7 mm2.According to the invention a toilet paper satisfying one or the other of the two objectives referred to above, consisting of two plies of cellulose wadding of weight 10 to 40 g / m 2 each one of which is embossed with relief patterns, consisting at least in part of discrete protuberances oriented towards the inside of the sheet, and the other being unembossed, is characterized in that the embossed ply has at least 30% of the total area at the minus 30 and less than 90 protuberances per cm 2 , the top surface of which is less than 1 mm 2 , preferably less than 0.7 mm 2 .

En effet, la Demanderesse a constaté avec surprise qu'une double feuille ainsi caractérisée présente la même épaisseur qu'une double feuille réalisée avec deux plis gaufrés de la même manière que le pli gaufré de l'invention et assemblés en position pointes pointes.Indeed, the Applicant has found with surprise that a double sheet thus characterized has the same thickness as a double sheet made with two embossed folds in the same manner as the embossed ply of the invention and assembled in spikes point position.

Cette propriété n'a été observée que pour des densités du motif au moins égales à 30 picots par cm2 sur des portions de surface couvrant au moins 30 % de la surface totale.This property has been observed only for densities of the motif at least equal to 30 pins per cm 2 on surface portions covering at least 30% of the total area.

La surface au sommet des protubérances est d'autant plus faible que le nombre de ces dernières est localement élevé. Elle est de préférence inférieure à 0,7 mm2 pour 30 protubérances par cm2 et de préférnce inférieure ou égale à 0,4 mm2 pour 50 protubérances par cm2.The surface at the top of the protuberances is even weaker as the number of these latter is locally high. It is preferably less than 0.7 mm 2 for 30 protuberances per cm 2 and preferably less than or equal to 0.4 mm 2 for 50 protuberances per cm 2 .

Par épaisseur, dans le présent domaine technique, on entend l'épaisseur mesurée sur un empilement d'un certain nombre de feuilles (12 plis par exemple) sur lequel on applique une légère pression (2 kPa par exemple). Il s'ensuit que l'épaisseur prend en compte une certaine résistance à l'écrasement de la structure. Ainsi sans vouloir être lié par une explication, la conservation de l'épaisseur de la structure de l'invention résulte de la meilleure résistance à l'écrasement d'un pli qui a été gaufré avec un motif à densité élevée.By thickness, in the present technical field is meant the thickness measured on a stack of a certain number of sheets (12-ply for example) on which a slight pressure (2 kPa for example) is applied. It follows that the thickness takes into account a certain resistance to crushing of the structure. Thus without wishing to be bound by an explanation, the preservation of the thickness of the structure of the invention results from the better crush resistance of a ply which has been embossed with a high density pattern.

Conformément à une autre caractéristique le produit selon l'invention présente sur au moins 50% de la surface totale au moins 30 protubérances par cm2.According to another characteristic, the product according to the invention has at least 50% of the total surface area at least 30 protuberances per cm 2 .

Conformément à une autre caractéristique le nombre de protubérances est au moins de 50 par cm2.According to another characteristic, the number of protuberances is at least 50 per cm 2 .

Conformément à une autre caractéristique le produit présente un second motif de gaufrage entre lesdites portions de surface. Avantageusement ce motif peut être de type linéaire, c'est à dire constitué de protubérances dont la surface au sommet est de forme linéaire.According to another feature the product has a second embossing pattern between said surface portions. Advantageously, this pattern may be of linear type, ie consisting of protuberances whose surface at the apex is of linear shape.

L'invention est décrite plus de détail dans la présentation qui suit d'un mode de réalisation avec les dessins annexés sur lesquels:

  • la figure 1 représente schématiquement une coupe agrandie de la structure réalisée conformément à l'invention ;
  • la figure 2 représente une installation permettant de réaliser l'invention.
The invention is described in more detail in the following presentation of an embodiment with the appended drawings in which:
  • the figure 1 schematically represents an enlarged section of the structure made according to the invention;
  • the figure 2 represents an installation for carrying out the invention.

En référence à la figure 1, le produit 1 selon l'invention comprend deux plis, un pli gaufré 2, et un pli non gaufré ou lisse 4. Le pli gaufré comprend des protubérances 11 réparties suivant un pas constant déterminé sur une portion de surface. Dans la structure du produit selon l'invention, les protubérances du pli gaufré sont orientées vers l'intérieur. Les deux plis sont de préférence liés entre eux. En particulier, Ils peuvent être liés entre eux au niveau des surfaces distales des protubérances du pli gaufré. Avantageusement les deux plis sont liés par collageWith reference to the figure 1 , the product 1 according to the invention comprises two plies, an embossed ply 2, and a non-embossed or smooth ply 4. The embossed ply comprises protuberances 11 distributed at a fixed constant pitch over a surface portion. In the structure of the product according to the invention, the protuberances of the embossed ply are oriented towards the inside. The two plies are preferably linked together. In particular, they can be linked together at the distal surfaces of the protuberances of the embossed fold. Advantageously, the two plies are linked by gluing

Le produit selon l'invention a un grammage d'environ 20 à 80 g/m2. Chacun des plis est en ouate de cellulose. L'ouate de cellulose est un papier crêpé de faible grammage compris entre 10 et 40 g/cm2 qui a été séché sur un cylindre chauffé et dont II a été détaché au moyen d'une lame métallique, appelée racle de crêpage.The product according to the invention has a basis weight of about 20 to 80 g / m 2 . Each of the plies is made of cellulose wadding. Cellulose wadding is a creped paper of low basis weight between 10 and 40 g / cm 2 which has been dried on a heated cylinder and from which it has been detached by means of a metal blade, called a creping blade.

Sur des portions de surface représentant ensemble au moins 30 % de la surface totale, le pli gaufré a une densité de motifs supérieure à 30 protubérances/cm2 et une densité inférieure à 90 protubérences/cm2. Il peut encore présenter en plus un ou plusieurs types de motifs différents et dont les densités de motif sont différentes. Les protubérances peuvent alors être de hauteur différente, et le pli présente des motifs de niveaux différents. Les demandes de brevet européen EP-A-0 426 548 et EP-A-0 797 705 illustrent des produits gaufrés selon ces principes mais comportant deux plis gaufrés.On surface portions together representing at least 30% of the total area, the embossed ply has a pattern density greater than 30 protuberances / cm 2 and a density less than 90 protuberances / cm 2 . It can also present in addition one or more types of different patterns and whose pattern densities are different. The protuberances can then be of different height, and the fold has patterns of different levels. European patent applications EP-A-0 426 548 and EP-A-0 797 705 illustrate embossed products according to these principles but having two embossed folds.

Dans le produit selon l'invention, le deuxième pli n'est pas gaufré.In the product according to the invention, the second ply is not embossed.

La composition fibreuse et/ou chimique des plis peut être identique ou différente. Par exemple, le pli non gaufré peut avoir une composition fibreuse essentiellement à base de fibres longues telles que des fibres de résin eux, et le pli gaufré, une composition fibreuse essentiellement à base de fibres courtes. Cette combinaison permet d'obtenir un produit plus résistant sans sacrifier à la douceur apportée par les fibres courtes. Le pli non gaufré peut comprendre un additif résistant humide temporaire ou éventuellement permanent. Si cet additif est déjà présent dans une certaine quantité dans le pli gaufré, le pli non gaufré pourra en contenir une quantité plus importante. Un exemple d'additif résistant humide est un composé du type polyamine épichlorhydrine, commercialisé sous le nom KYMENE SLX par la société HERCULES. Le pli gaufré peut quant à lui comprendre un adoucissant ou déliant. La feuille ainsi constituée présente une très bonne résistance humide et donc une bonne solidité du fait en particulier de la composition du pli non gaufré. Elle offre par ailleurs une douceur de surface par le choix de la composition fibreuse et chimique du pli gaufré.The fibrous and / or chemical composition of the plies may be the same or different. For example, the unembossed ply may have a fibrous composition essentially based on long fibers such as resin fibers, and the embossed ply, a fibrous composition essentially based on short fibers. This combination makes it possible to obtain a more resistant product without sacrificing the softness provided by the short fibers. The non-embossed ply may comprise a temporary or possibly permanent wet resistant additive. If this additive is already present in a certain amount in the embossed fold, the non-embossed fold may contain a larger amount. An example of a wet-resistant additive is a compound of the polyamine epichlorohydrin type, marketed under the name KYMENE SLX by the company HERCULES. The embossed fold can mean a softener or debinding. The sheet thus formed has a very good wet strength and therefore good strength, in particular because of the composition of the non-embossed ply. It also offers a softness of surface by the choice of the fibrous and chemical composition of the embossed fold.

Chaque pli peut encore être constitué d'une ou plusieurs couches formant un stratifié. Les couches dans ce cas peuvent également avoir une composition fibreuse et/ou chimique différente.Each fold may further consist of one or more layers forming a laminate. The layers in this case may also have a different fibrous and / or chemical composition.

On a représenté la feuille avec les deux plis 2 et 4 superposés. Ils sont disposés de telle sorte que les protubérances sont à l'intérieur de la feuille. On peut lier les deux plis l'un à l'autre de toute manière connue de l'homme du métier, telle que, par exemple, mécaniquement par moletage, c'est-à-dire en faisant passer la feuille entre une molette et un contre-cylindre lisse.The sheet is represented with the two folds 2 and 4 superimposed. They are arranged so that the protuberances are inside the sheet. The two plies can be bonded to each other in any manner known to those skilled in the art, such as, for example, mechanically by knurling, that is to say by passing the sheet between a wheel and a smooth counter cylinder.

De préférence cependant, on lie les deux plis l'un à l'autre au moyen d'une substance adhésive interposée entre les sommets des protubérances des plis représentés qui viennent en contact. La substance adhésive est alors de préférence déposée sur les sommets les plus élevés des éléments du motif, et est avantageusement colorée afin d'en faire ressortir les détails. Ainsi lorsque le pli gaufré présente des protubérances dont les sommets sont à des niveaux différents, on réalise un produit partiellement associé sur une faible surface. On obtient un produit particulièrement souple lorsque la surface est inférieure à 5 %.Preferably, however, the two plies are bonded to one another by means of an adhesive substance interposed between the vertices of the protuberances of the folds represented which come into contact. The adhesive substance is then preferably deposited on the highest vertices of the elements of the pattern, and is advantageously colored in order to bring out the details. Thus, when the embossed ply has protuberances whose vertices are at different levels, a partially associated product is produced on a small surface. We obtain a product particularly soft when the surface is less than 5%.

On a représenté sur la figure 2 une machine permettant de fabriquer une telle structure de feuille. Elle est constituée essentiellement d'éléments faisant partie de l'état de la technique. Un premier cylindre de gaufrage 10 a été gravé selon un motif avec des picots de forme adaptée aux protubérances souhaitées. Le procédé consiste à gaufrer un pli d'ouate de cellulose 20, déroulé à partir d'une bobine non représentée, entre le cylindre de gaufrage 10 et un cylindre en caoutchouc 12 puis à venir assembler au moyen d'un cylindre marieur 14 un pli d'ouate de cellulose non gaufré 40, déroulé également à partir d'une bobine non représentée, sur le premier 20 alors qu'il est toujours en contact avec le cylindre de gaufrage. Auparavant on a appliqué le cas échéant de la substance adhésive, de préférence à base aqueuse, sur les sommets du pli gaufré, au moyen d'un cylindre d'encollage 16.We have shown on the figure 2 a machine for making such a sheet structure. It consists essentially of elements forming part of the state of the art. A first embossing cylinder 10 has been etched in a pattern with spikes of a shape adapted to the desired protuberances. The method consists of embossing a fold of cellulose wadding 20 unwound from a not shown reel, between the embossing roll 10 and a rubber roll 12 and then coming together by means of a marrying roll 14 a fold non-embossed cellulose wadding 40, also unwound from a not shown spool, on the first 20 while it is still in contact with the embossing roll. Previously, the adhesive substance, preferably water-based, has been applied to the tops of the embossed fold by means of a sizing roll 16.

Les produits selon l'invention présentent des caractéristiques très avantageuses par rapport aux produits constitués de deux plis existants sur le marché.The products according to the invention have very advantageous characteristics compared to products consisting of two plies existing on the market.

Ceci est illustré par l'exemple suivant où l'on a réalisé, à partir de feuilles d'ouate de cellulose de qualité papier hygiénique et de grammages différents, des produits selon une technique standard (référencés 1 et 3) tels que ceux vendus sous la marque LOTUS, et des produits (référencés 2 et 4) selon l'invention, c'est à dire avec un seul pli gaufré.This is illustrated by the following example, which was made from sheets of tissue wadding of hygienic quality and different weights, products according to a standard technique (referenced 1 and 3) such as those sold under the mark LOTUS, and products (referenced 2 and 4) according to the invention, that is to say with a single embossed fold.

Dans l'exemple A, le motif est celui qui est actuellement commercialisé sous la marque LOTUS et comprend 80 protubérances par cm2. La surface au sommet de ces dernières est inférieure à 0,4 mm2. Le produit standard est alors associé en mode pointes/pointes.In Example A, the pattern is one currently sold under the trademark LOTUS and comprises 80 protuberances per cm 2. The surface at the top of these is less than 0.4 mm 2 . The standard product is then associated in point / tip mode.

Dans l'exemple B, le motif est composé de protubérances de surface au sommet également inférieure à 1 mm2. Elles sont réparties selon des alignements le long desquels la densité de motif est supérieure à 30 protubérances par cm2, les alignements étant séparés entre eux avec des espacements suffisants pour permettre un assemblage en position nested. La densité moyenne est de 15 p/cm2. Un tel motif est décrit dans la demande de brevet déposée par la Demanderesse sous le numéro FR-A-98 05147 le 24 avril 1998 .In Example B, the pattern is composed of surface protuberances at the apex also less than 1 mm 2 . They are distributed in alignments along which the pattern density is greater than 30 protuberances per cm 2 , the alignments being separated from each other with sufficient spacing to allow assembly in the nested position. The average density is 15 p / cm 2 . Such a pattern is described in the patent application filed by the Applicant under the number FR-A-98 05147 April 24, 1998 .

Dans l'exemple C, le motif est le même que pour B mais la pression spécifique de gaufrage était supérieure. Cela donne une épaisseur plus élevée que pour le produit standard assemblé en « nested ». Standard 1 Invention 2 Standard 3 Invention 4 Nombre de plis par feuille. 2 2 2 2 Grammage de la feuille en g/m2. 32.3 32.1 44 43.8 O) Feuille témoin réalisée avec deux plis non gaufrés Epaisseur en mm 0.19 0.19 0.31 0.31 Résistance en N/m : Sens travers ST 92 90 76 74 Sens marche SM 174 158 214 216 Allongement 27% 27% 34% 33% A) Transformation de deux plis : gaufrage avec motif de 80p/cm2 et assemblage pointes/pointes pour le produit standard. Nombre de plis gaufrés par feuille 2 1 2 1 Epaisseur en mm, d'une feuille (écart par rapport au témoin) 0.27 (+42%) 0.27 (+42%) 0.32 (+3%) 0.32 (+3%) Résistance du produit en N/m (écart/témoin) Sens travers ST 75 (-18%) 80 (-11%) 67 (-12%) 70 (-5%) Sens marche SM 147 (-15%) 157 (-1%) 190 (-11%) 200 (-7%) Allongement 23% 25% 28% 30% B) Transformation de deux plis : gaufrage avec motif de 15 p/cm2 en moyenne, assemblage « nested » pour le standard. Nombre de plis gaufrés 2 1 2 1 Epaisseur de la feuille (mm) 0.30 0.31 0.41 0.38 Résistance du produit : ST (N/m) 85 96 64 70 C) Transformation de deux plis : gaufrage avec motif de 15 p/cm2 en moyenne, assemblage « nested » pour le standard. Nombre de plis gaufrés 2 1 Epaisseur de la feuille (mm) 0.30 0.36 Résistance du produit : ST (N/m) 85 86 In Example C, the pattern is the same as for B but the embossing specific pressure was higher. This gives a higher thickness than for the standard product assembled in "nested". Standard 1 Invention 2 Standard 3 Invention 4 Number of folds per sheet. 2 2 2 2 Weight of the sheet in g / m 2 . 32.3 32.1 44 43.8 O) Control sheet made with two non-embossed folds Thickness in mm 0.19 0.19 0.31 0.31 Resistance in N / m: Sense through ST 92 90 76 74 SM walking direction 174 158 214 216 Elongation 27% 27% 34% 33% A) Transformation of two plies: embossing pattern with 80p / cm 2 and assembly points / points for the standard product. Number of embossed folds per sheet 2 1 2 1 Thickness in mm, of a leaf (deviation from the control) 0.27 (+ 42%) 0.27 (+ 42%) 0.32 (+ 3%) 0.32 (+ 3%) Product resistance in N / m (deviation / control) Sense through ST 75 (-18%) 80 (-11%) 67 (-12%) 70 (-5%) SM walking direction 147 (-15%) 157 (-1%) 190 (-11%) 200 (-7%) Elongation 23% 25% 28% 30% B) Transformation of two plies: embossing with a pattern of 15 p / cm 2 on average, assembly "nested" for the standard. Number of embossed folds 2 1 2 1 Thickness of the sheet (mm) 0.30 0.31 0.41 0.38 Product resistance: ST (N / m) 85 96 64 70 C) Transformation of two plies: embossing with a pattern of 15 p / cm 2 on average, assembly "nested" for the standard. Number of embossed folds 2 1 Thickness of the sheet (mm) 0.30 0.36 Product resistance: ST (N / m) 85 86

CAS A - Comparaison avec un produit standard en assemblage pointes/pointesCASE A - Comparison with a standard product in spike / tip assembly

En comparant les colonnes 1 et 2, on constate de façon surprenante que si l'on applique lors de la transformation du produit standard et du produit de l'invention des pressions de gaufrage respectives de manière à obtenir la même épaisseur (0.27 mm) dans les deux cas, on perd beaucoup moins en résistance avec le produit de l'invention. En fait, dans l'exemple, on avait la même pression de gaufrage pour le produit standard et pour le produit de l'invention. Ainsi pour le produit de l'invention on a perdu par le gaufrage et l'opération de transformation seulement 1% de résistance en sens marche et 11 % en résistance en sens travers alors que dans le produit standard de l'art antérieur, on a perdu respectivement 15% et 18%. On fait la même observation quand on considère les colonnes 3 et 4. Avec une association de pli conforme à l'invention, la transformation entraîne une perte de seulement 5 et 7 % contre 12 et 11% pour obtenir la même épaisseur de produit, 0.32 mm.Comparing columns 1 and 2, it is surprisingly found that if the standard product and the product of the invention are subjected to respective embossing pressures in order to obtain the same thickness (0.27 mm) in In both cases, much less resistance is lost with the product of the invention. In fact, in the example, there was the same embossing pressure for the standard product and for the product of the invention. Thus, for the product of the invention, only 1% resistance in the running direction and 11% resistance in the transverse direction have been lost by the embossing and the transformation operation, whereas in the standard product of the prior art, lost respectively 15% and 18%. The same observation is made when considering columns 3 and 4. With a fold association according to the invention, the transformation causes a loss of only 5 and 7% against 12 and 11% to obtain the same thickness of product, 0.32 mm.

En outre la douceur du produit de l'invention n'est de façon surprenante pas altérée par rapport au produit standard. Un test consommateur effectué sur un panel de 20 personnes au cours duquel on leur a demandé de donner leur avis sur la douceur au toucher des produits du présent cas, a donné les résultats suivants (dans une échelle allant de -3 à +3) :

  • Produit standard (1) : 1,6 +/- 0,2
  • Produit de l'invention (2) : 1,7 +/- 0,2
  • Produit standard (3) : 2 +/- 0,2
  • Produit de l'invention (4) : 2 +/- 0,2
In addition the softness of the product of the invention is surprisingly not impaired compared to the standard product. A consumer test conducted on a panel of 20 people in which they were asked to give their opinion on the softness of the products in this case, gave the following results (on a scale from -3 to +3):
  • Standard product (1): 1,6 +/- 0,2
  • Product of the invention (2): 1.7 +/- 0.2
  • Standard product (3): 2 +/- 0,2
  • Product of the invention (4): 2 +/- 0.2

CAS B - comparaison avec un produit standard en assemblage « nested »CASE B - comparison with a standard product in "nested" assembly

En comparant les résultats des colonnes 1 et 2 entre elles ou 3 et 4, on constate qu'en transformant les feuilles de façon à obtenir des produits ayant sensiblement la même épaisseur, on améliore nettement la résistance du produit de l'invention.By comparing the results of columns 1 and 2 between them or 3 and 4, it is found that by transforming the sheets so as to obtain products having substantially the same thickness, significantly improves the strength of the product of the invention.

CAS C - comparaison avec un produit standard en assemblage « nested »CASE C - Comparison with a standard product in "nested" assembly

En comparant les résultats des colonnes 1 et 2, on constate qu'en visant la réalisation de produits présentant la même résistance sens travers, on peut gaufrer le pli de manière plus intense dans le cas de l'invention. On obtient une épaisseur de 0,36 mm pour la feuille de l'invention contre seulement 0,30 mm par le produit standard. Du point de vue du consommateur, on réalise donc une feuille plus épaisse et d'aspect amélioré par un marquage plus net sans sacrifier à sa résistance mécanique.Comparing the results of columns 1 and 2, it is found that by aiming at the production of products having the same cross-directional resistance, it is possible to emboss the fold more intensively in the case of the invention. A thickness of 0.36 mm is obtained for the sheet of the invention against only 0.30 mm by the standard product. From the point of view of the consumer, therefore, a thicker and improved-looking sheet is produced by a clearer marking without sacrificing its mechanical strength.

A titre de contre exemple, on a réalisé un produit gaufré avec un motif constitué de protubérances sur le cylindre gravé de 1,3 mm de hauteur, à raison de 7 par cm2. Le procédé standard avec assemblage en « nested » des deux plis gaufrés donne une épaisseur de feuille de 0,28 mm pour une résistance sens travers de 80 N/m. Dans les mêmes conditions un produit avec un seul pli gaufré présente une perte en épaisseur de près de 20 % même si on constate un faible accroissement en résistance, inférieur à 9 %. En augmentant la pression on ne va obtenir une épaisseur similaire qu'au prix d'une résistance fortement dégradée.By way of example, an embossed product was produced with a pattern consisting of protuberances on the engraved cylinder 1.3 mm high, at a rate of 7 per cm 2 . The standard method with "nested" assembly of the two embossed folds gives a sheet thickness of 0.28 mm for a cross-directional strength of 80 N / m. Under the same conditions a product with a single embossed fold has a thickness loss of nearly 20% even if there is a slight increase in resistance, less than 9%. By increasing the pressure, a similar thickness will only be obtained at the cost of a strongly degraded resistance.

Conformément à un autre mode de réalisation de l'invention, on utilise un cylindre gravé 10 présentant des premiers picots et des seconds picots. Les premiers picots sont répartis selon un premier motif présentant sur au moins une portion de surface au moins 30 picots par cm2, et de préférence 50 picots par cm2. Les seconds picots sont répartis selon un second motif, le nombre des seconds picots est plus faible. Les sommets des seconds picots sont à un niveau supérieur de ceux des premiers picots. Ainsi ce cylindre permet-il de gaufrer un pli 20 selon des premières protubérances correspondant aux premiers picots et des secondes protubérances correspondant aux seconds picots. Le gaufrage est à deux niveaux. En raison de leur proéminence, les secondes protubérances du pli 20 formées sur le cylindre 10 reçoivent la colle du cylindre encolleur 16. La liaison avec le pli non gaufré 40 est ainsi assurée par les secondes protubérances. Conformément à cet autre mode de réalisation on introduit entre le cylindre 10 ainsi gravé et le cylindre marieur 14, un second pli non gaufré 40' représenté par une flèche sur la figure 2. En choisissant notamment correctement la quantité d'adhésif appliqué sur les secondes protubérances du pli 20 et la pression du cylindre marieur, on assure une répartition de la colle sur les deux faces du pli 40 et la formation d'une liaison entre le pli 40' et le pli 40 au niveau du sommet des secondes protubérances. On obtient ainsi un produit à trois plis à la fois épais et souple. Au lieu d'appliquer l'adhésif sur les sommets des protubérances on peut le pulvériser sur les deux faces du premier pli non gaufré.According to another embodiment of the invention, an engraved cylinder 10 having first pins and second pins is used. The first pins are distributed in a first pattern having on at least one surface portion at least 30 pins per cm 2 , and preferably 50 pins per cm 2 . The second pins are distributed in a second pattern, the number of second pins is lower. The vertices of the second spikes are at a higher level than those of the first spikes. Thus, this cylinder makes it possible to emboss a fold 20 according to first protuberances corresponding to the first pins and second protuberances corresponding to the second pins. The embossing is on two levels. Because of their prominence, the second protuberances of the fold 20 formed on the cylinder 10 receive the glue of the gluing cylinder 16. The connection with the non-embossed fold 40 is thus provided by the second protuberances. According to this other embodiment, a second non-embossed ply 40 ', represented by an arrow on the spindle, is introduced between the cylinder 10 thus etched and the marrying roll 14. figure 2 . By choosing in particular correctly the amount of adhesive applied to the second protuberances of the fold 20 and the pressure of the marrying cylinder, it ensures a distribution of the adhesive on both sides of the fold 40 and the formation of a connection between the fold 40 ' and the fold 40 at the top of the second protuberances. This produces a product with three plies both thick and flexible. Instead of applying the adhesive to the tops of the protuberances it can be sprayed on both sides of the first non-embossed ply.

Claims (9)

  1. Toilet paper product with a paper weight from about 20 g/m2 to about 80 g/m2 comprising an embossed ply having raised patterns consisting at least partially of discreet protuberances oriented towards the interior of the structure and a non-embossed ply, characterised in that the embossed ply has on at least 30% of the total surface at least 30 and less than 90 protuberances per cm2 of which the peak surface is less than 1 mm2 preferably less than 0.7 mm2.
  2. Toilet paper product as claimed in the preceding claim, characterised in that the embossed ply has on least 50% of the total surface at least 30 protuberances per cm2.
  3. Toilet paper product as claimed in any one of the preceding claims, characterised in that the number of protuberances is at least 50 per cm2, and their peak surface is less than equal to 0.4 mm2.
  4. Toilet paper product as claimed in any one of the preceding claims, characterised in that it has a second pattern of embossed protuberances between said surface portions.
  5. Toilet paper product as claimed in any one of the preceding claims, characterised in that the plies are joined together.
  6. Toilet paper product as claimed in the preceding claim, characterised in that the plies are joined together by connection of the distal surfaces from at least some of the protuberances of the embossed ply to said non-embossed ply.
  7. Toilet paper product as claimed in Claims 4 and 6, characterised in that the connection is obtained by means of adhesively joining the protuberances of the second pattern at least partially.
  8. Toilet paper product as claimed in any one of Claims 4 to 7, characterised in that it has a second non-embossed ply.
  9. Method to achieve a product as claimed in Claim 8, characterised in that it consists of embossing a ply of paper on an engraved cylinder having points whose peaks are at different levels, of placing an assembly formed of two superimposed non-embossed plies of paper in contact with the peaks of said protuberances by means of an adhesive, and of exerting a pressure in order to guarantee the connection of the embossed ply with the two non-embossed plies.
EP00900524A 1999-01-05 2000-01-05 Absorbent paper product comprising two or three plies Expired - Lifetime EP1159487B3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE60000977.7T DE60000977T3 (en) 1999-01-05 2000-01-05 TWO OR THREE-LAYER VOIDABLE PAPER PRODUCT

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9900033A FR2788066B1 (en) 1999-01-05 1999-01-05 NEW ABSORBENT PAPER PRODUCT COMPRISING TWO FOLD
FR9900033 1999-01-05
PCT/FR2000/000007 WO2000040800A1 (en) 1999-01-05 2000-01-05 Absorbent paper product comprising two plies

Publications (3)

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EP1159487A1 EP1159487A1 (en) 2001-12-05
EP1159487B1 EP1159487B1 (en) 2002-12-11
EP1159487B3 true EP1159487B3 (en) 2010-06-16

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EP00900524A Expired - Lifetime EP1159487B3 (en) 1999-01-05 2000-01-05 Absorbent paper product comprising two or three plies

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US (1) US6656569B1 (en)
EP (1) EP1159487B3 (en)
AT (1) ATE229594T1 (en)
CA (1) CA2357832C (en)
DE (1) DE60000977T3 (en)
DK (1) DK1159487T5 (en)
ES (1) ES2187436T7 (en)
FR (1) FR2788066B1 (en)
PT (1) PT1159487E (en)
TR (1) TR200101919T2 (en)
WO (1) WO2000040800A1 (en)

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EP1330352B1 (en) * 2000-09-27 2006-03-15 Georgia-Pacific France Method for making a multiply absorbent paper sheet
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
US20050230069A1 (en) * 2001-02-16 2005-10-20 Klaus Hilbig Method of making a thick and smooth embossed tissue
US7407560B2 (en) * 2001-02-16 2008-08-05 The Procter & Gamble Company Lotioned and embossed tissue paper
PT1319748E (en) 2001-12-12 2008-07-29 Georgia Pacific France Multiply sheet of absorbent paper
EP1455014B1 (en) * 2003-03-07 2011-08-17 Georgia-Pacific France Embossed absorbent paper sheet
US7694379B2 (en) 2005-09-30 2010-04-13 First Quality Retail Services, Llc Absorbent cleaning pad and method of making same
US7962993B2 (en) 2005-09-30 2011-06-21 First Quality Retail Services, Llc Surface cleaning pad having zoned absorbency and method of making same
EP1878830B1 (en) * 2006-07-11 2009-09-02 The Procter & Gamble Company A multiply tissue article having a particular configuration of embossed depressions, and containing a softening lotion
FR2928383B1 (en) * 2008-03-06 2010-12-31 Georgia Pacific France WAFER SHEET COMPRISING A PLY IN WATER SOLUBLE MATERIAL AND METHOD FOR PRODUCING SUCH SHEET
WO2009117794A1 (en) * 2008-03-24 2009-10-01 Wagner Do Brasil Ltda Process of manufacturing a multilayer absorbent product and product obtained
WO2009151544A2 (en) * 2008-05-27 2009-12-17 Georgia-Pacific Consumer Products Lp Ultra premium bath tissue
US8678806B2 (en) * 2008-08-07 2014-03-25 Sca Hygiene Products Gmbh Apparatus and method for ply bonding as well as multi-ply product
US8894813B2 (en) 2012-08-17 2014-11-25 Kimberly-Clark Worldwide, Inc. Absorbent barrier tissue
US20140050890A1 (en) 2012-08-17 2014-02-20 Kenneth John Zwick High Basis Weight Tissue with Low Slough
US9283730B2 (en) 2012-08-17 2016-03-15 Kimberly-Clark Worldwide, Inc. High basis weight creped tissue
KR101884583B1 (en) 2015-03-20 2018-08-01 킴벌리-클라크 월드와이드, 인크. Soft, high-basis tissue

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FR2653793B1 (en) 1989-10-30 1992-01-03 Kaysersberg Sa
GB2255745A (en) * 1991-05-16 1992-11-18 Kent Paper Products Limited Paper or like laminate
FR2728152B1 (en) * 1994-12-16 1997-01-24 Kaysersberg Sa COMBINED EMBOSSED ABSORBENT PAPER

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Publication number Publication date
EP1159487A1 (en) 2001-12-05
ES2187436T3 (en) 2003-06-16
US6656569B1 (en) 2003-12-02
DE60000977D1 (en) 2003-01-23
DK1159487T3 (en) 2003-04-14
DE60000977T2 (en) 2003-07-24
WO2000040800A1 (en) 2000-07-13
ATE229594T1 (en) 2002-12-15
CA2357832A1 (en) 2000-07-13
ES2187436T7 (en) 2011-08-01
PT1159487E (en) 2003-04-30
DK1159487T5 (en) 2010-10-11
CA2357832C (en) 2008-09-16
DE60000977T3 (en) 2018-07-19
FR2788066B1 (en) 2001-02-16
FR2788066A1 (en) 2000-07-07
EP1159487B1 (en) 2002-12-11
ES2187436T8 (en) 2011-09-22
TR200101919T2 (en) 2002-03-21

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