EP1319748B9 - Multiply sheet of absorbent paper - Google Patents

Multiply sheet of absorbent paper Download PDF

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Publication number
EP1319748B9
EP1319748B9 EP01403221A EP01403221A EP1319748B9 EP 1319748 B9 EP1319748 B9 EP 1319748B9 EP 01403221 A EP01403221 A EP 01403221A EP 01403221 A EP01403221 A EP 01403221A EP 1319748 B9 EP1319748 B9 EP 1319748B9
Authority
EP
European Patent Office
Prior art keywords
ply
protrusions
embossing
sheet
zones
Prior art date
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.)
Expired - Lifetime
Application number
EP01403221A
Other languages
German (de)
French (fr)
Other versions
EP1319748A1 (en
EP1319748B2 (en
EP1319748B1 (en
Inventor
Pierre Graff
Benoît Hoeft
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Essity Operations France SAS
Original Assignee
Georgia Pacific France SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Application filed by Georgia Pacific France SAS filed Critical Georgia Pacific France SAS
Priority to DE60133828T priority Critical patent/DE60133828T3/en
Priority to PT01403221T priority patent/PT1319748E/en
Priority to ES01403221T priority patent/ES2305043T5/en
Priority to EP01403221A priority patent/EP1319748B9/en
Priority to DK01403221.3T priority patent/DK1319748T4/en
Priority to AT01403221T priority patent/ATE393856T1/en
Priority to MXPA04005261A priority patent/MXPA04005261A/en
Priority to PCT/FR2002/004215 priority patent/WO2003050353A2/en
Priority to US10/498,218 priority patent/US7413630B2/en
Priority to CA2468208A priority patent/CA2468208C/en
Publication of EP1319748A1 publication Critical patent/EP1319748A1/en
Priority to NO20033551A priority patent/NO334198B1/en
Publication of EP1319748B1 publication Critical patent/EP1319748B1/en
Application granted granted Critical
Publication of EP1319748B2 publication Critical patent/EP1319748B2/en
Publication of EP1319748B9 publication Critical patent/EP1319748B9/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • B31F2201/0707—Embossing by tools working continuously
    • B31F2201/0715—The tools being rollers
    • B31F2201/0723—Characteristics of the rollers
    • B31F2201/0733—Pattern
    • 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
    • B31F2201/0707—Embossing by tools working continuously
    • B31F2201/0715—The tools being rollers
    • B31F2201/0723—Characteristics of the rollers
    • B31F2201/0738—Cross sectional profile of the embossments
    • 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
    • B31F2201/0758—Characteristics of the embossed product
    • B31F2201/0761—Multi-layered
    • B31F2201/0766—Multi-layered the layers being superposed tip to tip
    • 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.]
    • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • 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 invention relates to the field of absorbent papers for sanitary or domestic use, including papers creped cellulose wadding.
  • the embossing gives the leaf a bouffant and induces an improvement in the absorption of the liquids, the touch and the softness. It has been sought to further increase the absorption capacity by creating multilayer sheets obtained by combining at least two plies, each consisting of at least one of said embossed sheets.
  • the former is known in the field as "nested" or interlocking. It consists first of embossing each of the plies separately so as to form on the surface protrusions generally substantially frustoconical or truncated pyramid. Then, glue is deposited on the top of the protuberances of one of the folds after it has been embossed but before it is detached from the embossing roll. The pleats are placed so that the faces having the protuberances come opposite, the protuberances of the one between the protuberances of the other. We assemble them finally by bringing them closer to one another.
  • the two plies are bonded by adhesive films between the tops of the protuberances of a fold and non-embossed areas between the protuberances of the other fold.
  • the voids provided by this structure are adapted to ensure the sheet improved absorption.
  • the outer faces have a smooth and soft feel due to the cells formed by the back of the protuberances. This technique is illustrated by the patent US 3,867,225 .
  • the second mode of assembly is known in the field under the designation "tip to point". It differs from the previous one by the relative disposition of the two folds. After they have been embossed separately, these are brought together so as to make the tops of the protuberances coincide, all or at least in part. The folds are linked together by the tops of the protuberances, tips against points. This technique is illustrated by the patent US 3,414,459 .
  • a pattern of this type is of interest to the extent that it is clearly visible to the consumer.
  • the plaintiff has set itself the goal of producing products with patterns whose relief was accentuated and whose perception was improved.
  • the visual perception of the first pattern is increased by creating on the outer face second zones whose level is different from that of the first zones comprising the first pattern.
  • the three-dimensional effect is reinforced. It is also observed that the thickness of the sheet remains more homogeneous. This effect is further accentuated by the higher density of the pattern of the protuberances of the second zones.
  • the protuberances are divided into distinct zones with shapes and / or different dimensions.
  • the invention also includes other features taken individually or in combination.
  • the protuberances disposed on the first zones have a density of less than 20 cm 2 , preferably less than 12 cm 2 . Such a distribution of the first protuberances corresponds to heights of protuberances of between 1 and 2 mm. This creates spaces between the first embossed ply and the second ply ensuring good absorption without losing resistance to crushing. This is particularly true when the second ply is not embossed in the areas facing said first and second areas.
  • the protuberances disposed on the second zones have a smaller height than the first protuberances and a density greater than 30 cm 2 , preferably greater than 40 cm 2 . By their higher density and their different height, the second protuberances form trays that improve the contrast effect with the first zones.
  • the first zones and the second zones are adjacent.
  • Third wall-shaped protuberances connect two adjacent first protuberances of an alignment.
  • wall-shaped protuberances are created which reinforce the layout of the alignments without affecting the tear resistance.
  • the second ply is of the through-blow drying type.
  • the combination of a wadded fold of cellulose wadding, obtained by conventional wet pressing, with a fold of the through-blow drying type is particularly advantageous in the context of the invention. This optimizes the absorption with respect to the mechanical strength.
  • the invention also proposes a cylinder on which the first ply is waffled.
  • This comprises first pins forming alignments in first zones and second pins having a lower height and a higher density.
  • the vertices of the first and second pins are located in the same tangent planes along the generatrices of the cylinder.
  • the invention also provides a method of manufacturing a product according to the invention.
  • FIG. 1 An exemplary embodiment of a multiple sheet of absorbent paper.
  • This sheet comprises two folds arranged one on the other: a first so-called upper fold 12 and a second fold 14 said lower.
  • This sheet is intended for wiping on a general plan, and for use as a household paper towel in particular.
  • Such a product is in the form of a roll comprising fifty pre-cut coupons.
  • the paper is cellulose wadding weighing between 12 and 35 g / m 2 .
  • the upper fold 12 is, for example, of the type obtained by a method with conventional wet pressing, and known in the field under the acronym "CWP".
  • the fold 14 is preferably of the type obtained by a method with through air drying and known in the field under the acronym "TAD". according to another embodiment the two folds are of type "TAD"
  • the second fold is not embossed.
  • a method of making paper, CWP type consists of depositing the fibers in suspension in water on a fabric to form a sheet. The sheet is drained and then transferred to a felt which will allow to apply it with a press against a drying cylinder. The sheet is peeled off and is creped by means of a doctor blade. It is finally reeled waiting for a transformation into a finished product.
  • Such a technique, presented here in a summary way, is said to be conventional. There are of course variants.
  • This technique which is designated in the field under the acronym TAD, makes it possible to obtain a thicker sheet with a greater mass volume than the conventional technique.
  • the sheet 10 is oriented in two directions, one longitudinal and the other transverse, represented on the figures 1 and 2 by the arrows L and T which respectively correspond to the direction of travel of the sheet during manufacture, running direction, and the direction perpendicular thereto, cross direction.
  • the first embossing pattern 16 on the upper fold generally appears at the figure 1 and more in detail on the figure 2 . It is composed of first protuberances 18 of generally frustoconical shape projecting inside the sheet. Each protuberance corresponds to a cell on the other side of the fold 12, facing outwards. The protuberances are arranged in alignments, here concentric circles, inside first zones.
  • the protuberances 18 have a first height H1 which is between 0.5 mm and 1.5 mm. Their number inside the first zones is between 6 per cm 2 and 20 per cm 2 , preferably between 9 and 12 per cm 2 .
  • the vertices 19 of the protuberances are in contact with the lower fold 14.
  • first areas 16 are here in the form of disks.
  • the latter are themselves arranged according to two crossed directions of a square-meshed network, here at 45 ° with respect to the running direction L.
  • These protuberances 38 have a height H2 lower than that of the first protuberances 18. It is between 0.2 mm and 1.5 mm, as can be seen in FIG. figure 2 .
  • the second protuberances form a plate of smaller thickness. From the outer face, we see a cell to the right of each protrusion 38. The distribution of the protuberances 38 in the second zones 36 is tighter than those of the first zones 16.
  • the density of the pattern is between 30 per cm 2 and 80 per cm 2 , preferably between 40 and 60 per cm 2 .
  • the tray-shaped appearance comes from the relatively tight arrangement of the second protuberances which are distributed substantially uniformly in this area. On the edge of this zone, which is adjacent to the first zones, there is a very marked enhancement.
  • the top of the second protuberances is in contact with the fold 14.
  • a film of glue forms a connection between the vertex 39 of the protuberances and the fold 14. It is the same for vertices of the protuberances 18 of the first zones. It is understood that the vertices 19 and 39 are in the same plane as the fold 14.
  • the second fold 20 is not embossed.
  • the difference in height between H1 and H2 is between 0.3 mm and 1.3 mm.
  • FIG. 3 shows the general appearance of the surface of the cylinder with the lines of pins 28 and 48 arranged according to the pattern of the figure 1 .
  • the detail of the figure 4 corresponding to reference D4 on the figure 3 shows first frustoconical studs 28 with a vertex 29 forming a flattened surface.
  • the protuberances have a rather steep slope, between 70 ° and 75 °.
  • the protuberances 48 also have a frustoconical shape, with a top forming a flat surface 49.
  • the flats 49 are at the same altitude relative to the axis of rotation of the cylinder as the vertices 29.
  • the depth of the etching H ' 2 is less H'2 ⁇ H'1.
  • the protuberances 48 are distributed homogeneously in the second zones.
  • the pins have a frustoconical shape with a circular base.
  • Other forms are possible, including rhombus or truncated pyramid polygonal base or linear basis.
  • the method of making a sheet as claimed is to emboss a fold of creped cellulose wadding on the roll by pressing the fold on the roll by means of a rubber roll or other resilient material.
  • the embossing pressure must be sufficient for the cellulose wadding to enter the space between the pins of the first zones.
  • the paper in the first zones, the paper must descend to a depth greater than H '2.
  • the tray shape, with a tight pattern, second zones limits the penetration of paper between the pins of the second zones.
  • the rubber is rather pushed towards the periphery of the second zones. This results in an increased marking effect in this boundary portion between the first zones and the second zones.
  • glue is deposited on the flats 29 and 49. Since they are at the same height, it can simply be deposited by means of a cylinder. glue applicator. Next, we approach a non-embossed fold and press it on the vertices to form bonds between the two folds along these vertices. Once assembled, cut the sheet, and wind it to make a finished product as is common.
  • the binding of the folds is increased with respect to a two-level embossing method of the prior art because all the peaks of the pins are linked.
  • the sheet is double. It is within the scope of the invention to provide more than two folds.
  • the embossed fold may itself be double; the non-embossed fold also.
  • the pattern shown is given only as an example. Other reasons are conceivable insofar as they repeat the teaching of the invention.
  • a particular embodiment comprises a pattern consisting at least in part of second protuberances linear profile, for example drawing a flower.
  • the figure 5 represents another embodiment of the first zones which makes it possible to further improve the visible character of the embossed decoration.
  • a portion of the pins of the first zone is represented, in fact, pins on one of the alignments of this zone.
  • wall-shaped reliefs 30 have been disposed between the adjacent pins 28 of an alignment.
  • the pins 28 are frustoconical or truncated pyramid with a flat at the top 29.
  • the top 31 of the walls 30 is at a lower level with respect to the vertices 29.
  • the difference chosen is between 0.4 mm and 0.9 mm . In other words, it is also the difference between their height H'1 and H'3.
  • the thickness "e" of the walls 30 is less than that of the pins 28. That is to say, same height, it is smaller than the diameter of the pins.
  • the thickness of the walls is thus 10 to 50% lower than that of the pins, in particular to limit the additional embossing pressure resulting from the presence of low walls.
  • Their slope is preferably the same as that of the pins.
  • the difference between the heights H'1 and H'3 is sufficient for the rubber to come into contact with the upper surface 31 of the wall at the time of embossing and thus to conform the sheet to the wall at least partially.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Laminated Bodies (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Sanitary Thin Papers (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

The multilayer absorbent paper sheet, comprising two layers (12, 14) of cellulose wadding, each with a weight of 15 - 35 g/sq m, has the first layer embossed with a first set of motifs in selected zones (16), made from embossed protuberances (18) projecting towards the second layer (14) and forming open cells in the sheet's outer surface. <??>At least some of the protuberances (18) have their tips (19) attached to the inner surface of the second layer. The first layer of the paper has a second set of motifs made from a series of smaller embossed protuberances (38) of smaller dimensions than the first and having a higher density. The second set of protuberances are set in recesses (36) so that their tips (39) are in contact with the second layer and some are attached to it.

Description

L'invention se rapporte au domaine des papiers absorbants à usage sanitaire ou domestique, et notamment aux papiers en ouate de cellulose crêpée.The invention relates to the field of absorbent papers for sanitary or domestic use, including papers creped cellulose wadding.

Elle se rapporte en particulier au domaine des papiers destinés à l'essuyage dans un usage ménager, domestique ou industriel. Pour cette application, on utilise des papiers présentant une résistance à l'humidité conférée par l'addition d'une résine spécifique dans la pâte contenant les fibres papetières en suspension, avant la formation de la feuille. Cette résine, une fois réticulée, forme un réseau résistant au moins temporairement au pouvoir désagrégeant de l'eau.It relates in particular to the field of paper intended for wiping in domestic, domestic or industrial use. For this application, papers having a moisture resistance imparted by the addition of a specific resin in the pulp containing the suspended paper fibers before the formation of the sheet are used. This resin, once cured, forms a network resistant at least temporarily to the disintegrating power of water.

Dans ce domaine il est connu de confectionner des feuilles de papier composées de plusieurs plis crêpés de grammage compris entre 12 et 30-35 g/m2 munis de protubérances qui sont obtenues par gaufrage.In this field it is known to make sheets of paper composed of several crimped plies of grammage of between 12 and 30-35 g / m 2 provided with protuberances which are obtained by embossing.

En effet, le gaufrage donne du bouffant à la feuille et il induit une amélioration de l'absorption des liquides, du toucher et de la douceur. On a cherché à augmenter davantage la capacité d'absorption en créant des feuilles multicouches obtenues en associant au moins deux plis, constitués chacun d'au moins une desdites feuilles gaufrées.In fact, the embossing gives the leaf a bouffant and induces an improvement in the absorption of the liquids, the touch and the softness. It has been sought to further increase the absorption capacity by creating multilayer sheets obtained by combining at least two plies, each consisting of at least one of said embossed sheets.

On obtient ainsi une feuille multiple qui présente des caractéristiques mécaniques, telle que la résistance à la traction, ainsi qu'une capacité d'absorption déterminées.This gives a multiple sheet which has mechanical characteristics, such as tensile strength, as well as a specific absorption capacity.

Deux modes de gaufrage et d'assemblage des plis sont couramment mis en oeuvre selon les caractéristiques désirées du produit final.Two modes of embossing and ply assembly are commonly employed depending on the desired characteristics of the final product.

Le premier est connu dans le domaine sous la désignation "nested" ou à emboîtement. Il consiste d'abord à gaufrer chacun des plis séparément de manière à former en surface des protubérances généralement sensiblement tronconiques ou en troncs de pyramide. Ensuite, on dépose de la colle sur le sommet des protubérances de l'un des plis après qu'il a été gaufré mais avant qu'on le détache du cylindre gaufreur. On place les plis de façon que les faces présentant les protubérances viennent en vis-à-vis, les protubérances de l'un entre les protubérances de l'autre. On les assemble enfin en les rapprochant l'un de l'autre. Ainsi les deux plis sont liés par des pellicules de colle entre les sommets des protubérances d'un pli et des zones non gaufrées entre les protubérances de l'autre pli. Les vides ménagés par cette structure sont propres à assurer à la feuille une absorption améliorée. En outre, les faces extérieures ont un toucher lisse et moelleux en raison des alvéoles formés par le dos des protubérances. Cette technique est illustrée par le brevet US 3,867,225 .The former is known in the field as "nested" or interlocking. It consists first of embossing each of the plies separately so as to form on the surface protrusions generally substantially frustoconical or truncated pyramid. Then, glue is deposited on the top of the protuberances of one of the folds after it has been embossed but before it is detached from the embossing roll. The pleats are placed so that the faces having the protuberances come opposite, the protuberances of the one between the protuberances of the other. We assemble them finally by bringing them closer to one another. Thus the two plies are bonded by adhesive films between the tops of the protuberances of a fold and non-embossed areas between the protuberances of the other fold. The voids provided by this structure are adapted to ensure the sheet improved absorption. In addition, the outer faces have a smooth and soft feel due to the cells formed by the back of the protuberances. This technique is illustrated by the patent US 3,867,225 .

Le second mode d'assemblage est connu dans le domaine sous la désignation « pointe à pointe ». Il se distingue du précédent par la disposition relative des deux plis. Après qu'ils ont été gaufrés séparément, on amène ceux-ci l'un sur l'autre de façon à faire coïncider les sommets des protubérances, tous ou au moins en partie. Les plis sont liés entre eux par les sommets des protubérances, pointes contre pointes. Cette technique est illustrée par le brevet US 3,414,459 .The second mode of assembly is known in the field under the designation "tip to point". It differs from the previous one by the relative disposition of the two folds. After they have been embossed separately, these are brought together so as to make the tops of the protuberances coincide, all or at least in part. The folds are linked together by the tops of the protuberances, tips against points. This technique is illustrated by the patent US 3,414,459 .

Les produit fabriqués selon ces techniques ont longtemps présenté un motif de gaufrage simple dans lequel les protubérances étaient alignées selon deux directions croisées, de manière uniforme. Un tel motif permet d'obtenir des propriétés homogènes mais présente peu d'attrait visuel.The products made by these techniques have long exhibited a simple embossing pattern in which the protuberances were aligned in two crossed directions, uniformly. Such a pattern provides homogeneous properties but has little visual appeal.

Cependant depuis quelques années, on a cherché à rendre l'aspect du produit moins banal en répartissant différemment les protubérances. La demanderesse commercialise ainsi un essuie-tout dont les alvéoles en surface sont disposés selon des cercles concentriques évoquant la propagation de l'absorption d'un liquide que l'on verse sur une feuille absorbante ou bien la propagation des ondes en surface lorsqu'une goutte d'eau tombe dans un liquide. Ce motif notamment est composé de premières zones distinctes en forme de disques définis par trois ou quatre cercles concentriques. Les disques sont eux-mêmes disposés régulièrement selon des directions croisées. Des secondes zones, définies entre les disques adjacents, ont une forme générale de losange.However, in recent years, attempts have been made to make the appearance of the product less ordinary by distributing the protuberances differently. The applicant thus markets a paper towel whose surface cells are arranged in concentric circles evoking the propagation of the absorption of a liquid that is poured onto an absorbent sheet or the propagation of surface waves when a drop of water falls into a liquid. This particular pattern is composed of first distinct disk-shaped areas defined by three or four concentric circles. The discs are themselves arranged regularly in crossed directions. Second zones, defined between the adjacent disks, have a general diamond shape.

Un motif de ce type présente un intérêt dans la mesure où il est bien visible par le consommateur.A pattern of this type is of interest to the extent that it is clearly visible to the consumer.

La demanderesse s'est fixé comme objectif la réalisation de produits présentant des motifs dont le relief était accentué et dont la perception était améliorée.The plaintiff has set itself the goal of producing products with patterns whose relief was accentuated and whose perception was improved.

Elle est parvenue à réaliser cet objectif avec une feuille multiple selon la revendication 1.It has achieved this goal with a multiple sheet according to claim 1.

Grâce à la structure ainsi définie, on augmente la perception visuelle du premier motif en créant sur la face externe des secondes zones dont le niveau est différent de celui des premières zones comportant le premier motif. L'effet tridimensionnel est renforcé. On observe également que l'épaisseur de la feuille reste plus homogène. Cet effet est en outre accentué par la densité plus élevée du motif des protubérances des secondes zones.By virtue of the structure thus defined, the visual perception of the first pattern is increased by creating on the outer face second zones whose level is different from that of the first zones comprising the first pattern. The three-dimensional effect is reinforced. It is also observed that the thickness of the sheet remains more homogeneous. This effect is further accentuated by the higher density of the pattern of the protuberances of the second zones.

Le brevet US 2177490 porte sur une feuille d'emballage constituée de deux plis gaufrés dont chacun présente des protubérances sur les deux faces. Les protubérances sont réparties en zones distinctes avec des formes et/ou des dimensions différentes.The US Patent 2177490 door on a packing sheet consisting of two embossed folds each of which has protuberances on both sides. The protuberances are divided into distinct zones with shapes and / or different dimensions.

L'invention comprend également d'autres caractéristiques prises individuellement ou en combinaison.The invention also includes other features taken individually or in combination.

Les protubérances disposées sur les premières zones ont une densité inférieure à 20 au cm2 de préférence inférieure à 12 au cm2. Une telle répartition des premières protubérances correspond à des hauteurs de protubérances comprises entre 1 et 2 mm. Cela permet de créer entre le premier pli gaufré et le second pli des espaces assurant une bonne absorption sans perdre en résistance à l'écrasement. Cela vaut en particulier lorsque le second pli n'est pas gaufré dans les zones faisant face auxdites premières et secondes zones.The protuberances disposed on the first zones have a density of less than 20 cm 2 , preferably less than 12 cm 2 . Such a distribution of the first protuberances corresponds to heights of protuberances of between 1 and 2 mm. This creates spaces between the first embossed ply and the second ply ensuring good absorption without losing resistance to crushing. This is particularly true when the second ply is not embossed in the areas facing said first and second areas.

Les protubérances disposées sur les secondes zones ont par rapport aux premières protubérances une hauteur plus faible et une densité supérieure à 30 au cm2 de préférence supérieure à 40 au cm2. Par leur densité plus élevée et leur hauteur différente, les secondes protubérances forment des plateaux qui améliorent l'effet de contraste avec les premières zones.The protuberances disposed on the second zones have a smaller height than the first protuberances and a density greater than 30 cm 2 , preferably greater than 40 cm 2 . By their higher density and their different height, the second protuberances form trays that improve the contrast effect with the first zones.

Les premières zones et les secondes zones sont adjacentes.The first zones and the second zones are adjacent.

Des troisièmes protubérances en forme de muret relient deux premières protubérances adjacentes d'un alignement. Afin d'améliorer encore la visibilité du motif des premières protubérances, on crée des protubérances en forme de muret qui renforcent le tracé des alignements sans pour autant nuire à la résistance à la déchirure.Third wall-shaped protuberances connect two adjacent first protuberances of an alignment. In order to further improve the visibility of the pattern of the first protuberances, wall-shaped protuberances are created which reinforce the layout of the alignments without affecting the tear resistance.

Le second pli est du type à séchage par soufflage traversant. La combinaison d'un pli gaufré d'ouate de cellulose, obtenue par pressage humide conventionnel, avec un pli du type à séchage par soufflage traversant est particulièrement avantageuse dans le cadre de l'invention. On optimise ainsi l'absorption par rapport à la résistance mécanique.The second ply is of the through-blow drying type. The combination of a wadded fold of cellulose wadding, obtained by conventional wet pressing, with a fold of the through-blow drying type is particularly advantageous in the context of the invention. This optimizes the absorption with respect to the mechanical strength.

L'invention propose aussi un cylindre sur lequel on gaufre le premier pli. Celui-ci comprend des premiers picots formant des alignements dans des premières zones et des seconds picots dont la hauteur est plus faible et la densité plus élevée. Les sommets des premiers et des seconds picots sont situés dans les mêmes plans tangents le long des génératrices du cylindre.The invention also proposes a cylinder on which the first ply is waffled. This comprises first pins forming alignments in first zones and second pins having a lower height and a higher density. The vertices of the first and second pins are located in the same tangent planes along the generatrices of the cylinder.

L'invention propose également un procédé de fabrication d'un produit conforme à l'invention.The invention also provides a method of manufacturing a product according to the invention.

D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description détaillée qui suit pour la compréhension de laquelle on se reportera aux dessins annexés sur lesquels :

  • la figure 1 représente, vu de dessus, un exemple de réalisation d'une feuille de papier multiple gaufré conforme à l'invention,
  • la figure 2 est une vue schématique, en coupe et en perspective cavalière, d'une feuille de papier multiple conforme à l'invention,
  • la figure 3 est une vue schématique, en perspective, montrant la surface d'un cylindre de gaufrage,
  • la figure 4 est une vue agrandie de la surface du cylindre de la figure 3 non selon la revendication 1.
  • la figure 5 est une vue, en perspective, d'un autre mode de réalisation des picots de la première zone selon l'invention,
  • la figure 6 est une représentation photographique d'une feuille de l'invention.
Other characteristics and advantages of the invention will appear on reading the detailed description which follows for the understanding of which reference will be made to the appended drawings in which:
  • the figure 1 represents, seen from above, an embodiment of a sheet of embossed multiple paper according to the invention,
  • the figure 2 is a schematic view, in cross-section and in perspective view, of a sheet of multiple paper according to the invention,
  • the figure 3 is a schematic view, in perspective, showing the surface of an embossing cylinder,
  • the figure 4 is an enlarged view of the cylinder surface of the figure 3 not according to claim 1.
  • the figure 5 is a view, in perspective, of another embodiment of the pins of the first zone according to the invention,
  • the figure 6 is a photographic representation of a sheet of the invention.

On a représenté sur les figures 1 et 2 un exemple de réalisation d'une feuille multiple 10 de papier absorbant. Cette feuille comprend deux plis disposés l'un sur l'autre : un premier pli dit supérieur 12 et un second pli 14 dit inférieur. Cette feuille est destinée à l'essuyage sur un plan général, et à un usage comme essuie-tout ménager notamment. Un tel produit se présente sous la forme de rouleau comprenant une cinquantaine de coupons prédécoupés. Le papier est de l'ouate de cellulose de grammage compris entre 12 et 35 g/m2. Le pli supérieur 12 est, par exemple, du type obtenu selon un procédé avec pressage conventionnel humide, et connu dans le domaine sous le sigle « CWP ». Le pli 14 est lui de préférence du type obtenu selon un procédé avec séchage par air traversant et connu dans le domaine sous le sigle « TAD ». selon un autre mode de réalisation les deux plis sont de type « TAD »We have shown on figures 1 and 2 an exemplary embodiment of a multiple sheet of absorbent paper. This sheet comprises two folds arranged one on the other: a first so-called upper fold 12 and a second fold 14 said lower. This sheet is intended for wiping on a general plan, and for use as a household paper towel in particular. Such a product is in the form of a roll comprising fifty pre-cut coupons. The paper is cellulose wadding weighing between 12 and 35 g / m 2 . The upper fold 12 is, for example, of the type obtained by a method with conventional wet pressing, and known in the field under the acronym "CWP". The fold 14 is preferably of the type obtained by a method with through air drying and known in the field under the acronym "TAD". according to another embodiment the two folds are of type "TAD"

Selon le mode de réalisation représenté, le second pli n'est pas gaufré.According to the embodiment shown, the second fold is not embossed.

Un procédé de fabrication du papier, de type CWP consiste à déposer les fibres en suspension dans l'eau sur une toile pour former une feuille. On égoutte la feuille, puis on la transfère sur un feutre qui va permettre de l'appliquer avec une presse contre un cylindre de séchage. La feuille en est décollée et est crêpée au moyen d'une lame formant racle. Elle est enfin mise en bobine en attente d'une transformation en produit fini. Une telle technique, présentée ici de façon sommaire, est dite conventionnelle. Il existe bien sûr des variantes.A method of making paper, CWP type consists of depositing the fibers in suspension in water on a fabric to form a sheet. The sheet is drained and then transferred to a felt which will allow to apply it with a press against a drying cylinder. The sheet is peeled off and is creped by means of a doctor blade. It is finally reeled waiting for a transformation into a finished product. Such a technique, presented here in a summary way, is said to be conventional. There are of course variants.

Une technique de type TAD consiste après égouttage à sécher la feuille sans exercer de pression, en partie au moins, jusqu'à une siccité suffisante pour figer les fibres au sein de la feuille. Le cas échéant, on termine le séchage par application de la feuille sur un cylindre chauffé. Grâce à ce premier séchage, on peut presser la feuille sur le cylindre. Elle conserve une partie de son volume. Ce cylindre permet en outre son crêpage. On réalise le séchage sans pression en soufflant de l'air chaud au travers de la feuille après son égouttage. Cette technique, que l'on désigne dans le domaine sous le sigle TAD, permet d'obtenir une feuille plus épaisse, de plus grand volume massique que la technique conventionnelle.A technique of TAD type after draining to dry the sheet without exerting pressure, at least in part, to a sufficient dryness to freeze the fibers within the sheet. If necessary, the drying is completed by applying the sheet to a heated cylinder. With this first drying, the sheet can be pressed onto the cylinder. It retains part of its volume. This cylinder also allows its creping. The drying is carried out without pressure by blowing hot air through the sheet after draining. This technique, which is designated in the field under the acronym TAD, makes it possible to obtain a thicker sheet with a greater mass volume than the conventional technique.

La feuille 10 est orientée selon deux directions, l'une longitudinale et l'autre transversale, représentées sur les figures 1 et 2 par les flèches L et T qui correspondent respectivement à la direction de défilement de la feuille lors de sa fabrication, sens marche, et la direction perpendiculaire à celle-ci, sens travers.The sheet 10 is oriented in two directions, one longitudinal and the other transverse, represented on the figures 1 and 2 by the arrows L and T which respectively correspond to the direction of travel of the sheet during manufacture, running direction, and the direction perpendicular thereto, cross direction.

Le premier motif de gaufrage 16 sur le pli supérieur apparaît globalement à la figure 1 et plus en détail sur la figure 2. Il est composé de premières protubérances 18 de forme générale tronconique faisant saillie à l'intérieur de la feuille. A chaque protubérance correspond un alvéole sur l'autre face du pli 12, tournée vers l'extérieur. Les protubérances sont disposées selon des alignements, ici des cercles concentriques, à l'intérieur de premières zones. Les protubérances 18 ont une première hauteur H1 qui est comprise entre 0,5 mm et 1,5 mm. Leur nombre à l'intérieur des premières zones est compris entre 6 par cm2 et 20 par cm2, de préférence entre 9 et 12 par cm2. Les sommets 19 des protubérances sont au contact du pli inférieur 14.The first embossing pattern 16 on the upper fold generally appears at the figure 1 and more in detail on the figure 2 . It is composed of first protuberances 18 of generally frustoconical shape projecting inside the sheet. Each protuberance corresponds to a cell on the other side of the fold 12, facing outwards. The protuberances are arranged in alignments, here concentric circles, inside first zones. The protuberances 18 have a first height H1 which is between 0.5 mm and 1.5 mm. Their number inside the first zones is between 6 per cm 2 and 20 per cm 2 , preferably between 9 and 12 per cm 2 . The vertices 19 of the protuberances are in contact with the lower fold 14.

Ces premières zones 16 sont donc ici en forme de disques. Ces derniers sont eux-mêmes ordonnés selon deux directions croisées d'un réseau à maille carrée, ici à 45° par rapport au sens marche L. A l'intérieur de chaque maille, formée par les disques des premières zones, on trouve des secondes protubérances 38 formant des secondes zones 36. Ces protubérances 38 ont une hauteur H2 plus faible que celle des premières protubérances 18. Elle est comprise entre 0,2 mm et 1,5 mm comme on le voit bien sur la figure 2. Les secondes protubérances forment un plateau d'épaisseur plus faible. Depuis la face externe, on voit un alvéole au droit de chaque protubérance 38. La répartition des protubérances 38 dans les secondes zones 36 est plus serrée que celles des premières zones 16. La densité du motif est comprise entre 30 par cm2 et 80 par cm2, de préférence entre 40 et 60 par cm2. L'aspect en forme de plateau vient de la disposition relativement serrée des secondes protubérances qui sont réparties sensiblement uniformément dans cette zone. En bordure de cette zone qui est adjacente aux premières zones, on observe un rehaussement très net. Le sommet des secondes protubérances est en contact avec le pli 14. Au moins pour certains, et en particulier pour l'ensemble, une pellicule de colle forme une liaison entre le sommet 39 des protubérances et le pli 14. Il en est de même des sommets des protubérances 18 des premières zones. On comprend que les sommets 19 et 39 sont dans le même plan que le pli 14.These first areas 16 are here in the form of disks. The latter are themselves arranged according to two crossed directions of a square-meshed network, here at 45 ° with respect to the running direction L. Inside each mesh, formed by the disks of the first zones, there are seconds protuberances 38 forming second zones 36. These protuberances 38 have a height H2 lower than that of the first protuberances 18. It is between 0.2 mm and 1.5 mm, as can be seen in FIG. figure 2 . The second protuberances form a plate of smaller thickness. From the outer face, we see a cell to the right of each protrusion 38. The distribution of the protuberances 38 in the second zones 36 is tighter than those of the first zones 16. The density of the pattern is between 30 per cm 2 and 80 per cm 2 , preferably between 40 and 60 per cm 2 . The tray-shaped appearance comes from the relatively tight arrangement of the second protuberances which are distributed substantially uniformly in this area. On the edge of this zone, which is adjacent to the first zones, there is a very marked enhancement. The top of the second protuberances is in contact with the fold 14. At least for some, and in particular for the assembly, a film of glue forms a connection between the vertex 39 of the protuberances and the fold 14. It is the same for vertices of the protuberances 18 of the first zones. It is understood that the vertices 19 and 39 are in the same plane as the fold 14.

Le second pli 20 n'est pas gaufré. L'écart de hauteur entre H1 et H2 est compris entre 0,3 mm et 1,3 mm.The second fold 20 is not embossed. The difference in height between H1 and H2 is between 0.3 mm and 1.3 mm.

Pour gaufrer le pli supérieur, on utilise un cylindre gravé comme on peut le voir sur les figures 3 et 4. La figure 3 montre l'aspect général de la surface du cylindre avec les lignes de picots 28 et 48 disposés selon le motif de la figure 1. Le détail de la figure 4, correspondant à la référence D4 sur la figure 3, montre des premiers picots de forme tronconique 28 avec un sommet 29 formant un méplat. Les protubérances ont une pente assez raide, entre 70° et 75°. La hauteur H'1 des picots entre les méplats 29 et le fond de la gravure 28 est au moins égale à H1 : H'1>=H1. Les protubérances 48 ont aussi une forme tronconique, avec un sommet formant un méplat 49. Les méplats 49 sont à la même altitude par rapport à l'axe de rotation du cylindre que les sommets 29. En revanche, la profondeur de la gravure H'2 est moindre H'2<H'1. Les protubérances 48 sont réparties de façon homogène dans les secondes zones.To emboss the upper fold, we use an engraved cylinder as we can see on the Figures 3 and 4 . The figure 3 shows the general appearance of the surface of the cylinder with the lines of pins 28 and 48 arranged according to the pattern of the figure 1 . The detail of the figure 4 , corresponding to reference D4 on the figure 3 shows first frustoconical studs 28 with a vertex 29 forming a flattened surface. The protuberances have a rather steep slope, between 70 ° and 75 °. The height H'1 of the pins between the flats 29 and the bottom of the etching 28 is at least equal to H1: H'1> = H1. The protuberances 48 also have a frustoconical shape, with a top forming a flat surface 49. The flats 49 are at the same altitude relative to the axis of rotation of the cylinder as the vertices 29. On the other hand, the depth of the etching H ' 2 is less H'2 <H'1. The protuberances 48 are distributed homogeneously in the second zones.

Dans l'exemple représenté, les picots ont une forme tronconique à base circulaire. D'autres formes sont possibles, losange notamment ou bien tronc de pyramide à base polygonale ou encore à base linéaire.In the example shown, the pins have a frustoconical shape with a circular base. Other forms are possible, including rhombus or truncated pyramid polygonal base or linear basis.

Le procédé de fabrication d'une feuille 10 telle que revendiquée consiste à gaufrer un pli d'ouate de cellulose crêpée sur le cylindre en pressant le pli sur le cylindre au moyen d'un cylindre en caoutchouc ou en une autre matière résiliente. La pression de gaufrage doit être suffisante pour que l'ouate de cellulose pénètre dans l'espace entre les picots des premières zones. En particulier, dans les premières zones, le papier doit descendre à une profondeur supérieure à H'2. La forme en plateau, avec un motif serré, des secondes zones en revanche limite la pénétration du papier entre les picots des secondes zones. Le caoutchouc est plutôt refoulé vers la périphérie des secondes zones. Il en résulte un effet de marquage accru dans cette partie frontière entre les premières zones et les secondes zones.The method of making a sheet as claimed is to emboss a fold of creped cellulose wadding on the roll by pressing the fold on the roll by means of a rubber roll or other resilient material. The embossing pressure must be sufficient for the cellulose wadding to enter the space between the pins of the first zones. In particular, in the first zones, the paper must descend to a depth greater than H '2. The tray shape, with a tight pattern, second zones on the other hand limits the penetration of paper between the pins of the second zones. The rubber is rather pushed towards the periphery of the second zones. This results in an increased marking effect in this boundary portion between the first zones and the second zones.

Pour fabriquer une feuille à deux plis selon l'enseignement de l'invention, on dépose de la colle sur les méplats 29 et 49. Comme ils se trouvent à la même hauteur, on peut déposer simplement celle-ci au moyen d'un cylindre applicateur de colle. Ensuite, on approche un pli non gaufré et le presse sur les sommets pour former des liaisons entre les deux plis le long de ces sommets. Une fois assemblée, on découpe la feuille, et on l'enroule pour en faire un produit fini comme cela est courant.To manufacture a two-ply sheet according to the teaching of the invention, glue is deposited on the flats 29 and 49. Since they are at the same height, it can simply be deposited by means of a cylinder. glue applicator. Next, we approach a non-embossed fold and press it on the vertices to form bonds between the two folds along these vertices. Once assembled, cut the sheet, and wind it to make a finished product as is common.

Suivant ce procédé, on augmente la liaison des plis entre eux par rapport à un procédé de gaufrage à deux niveaux de l'art antérieur car tous les sommets des picots sont liés.According to this method, the binding of the folds is increased with respect to a two-level embossing method of the prior art because all the peaks of the pins are linked.

Dans la description qui précède, la feuille est double. Il entre dans le cadre de l'invention de prévoir plus de deux plis. Par exemple, le pli gaufré peut être lui-même double ; le pli non gaufré également. Bien entendu, le motif représenté n'est donné qu'à titre d'exemple. D'autres motifs sont envisageables dans la mesure où ils reprennent l'enseignement de l'invention. En particulier, un mode particulier de réalisation comprend un motif constitué au moins en partie de deuxièmes protubérances à profil linéaire, dessinant par exemple une fleur.In the foregoing description, the sheet is double. It is within the scope of the invention to provide more than two folds. For example, the embossed fold may itself be double; the non-embossed fold also. Of course, the pattern shown is given only as an example. Other reasons are conceivable insofar as they repeat the teaching of the invention. In particular, a particular embodiment comprises a pattern consisting at least in part of second protuberances linear profile, for example drawing a flower.

La figure 5 représente un autre mode de réalisation des premières zones qui permet d'améliorer encore le caractère visible du décor gaufré.The figure 5 represents another embodiment of the first zones which makes it possible to further improve the visible character of the embossed decoration.

On a représenté une partie des picots de la première zone, en fait des picots sur un des alignements de cette zone. Selon ce mode de réalisation on a disposé des reliefs en forme de murets 30 entre les picots adjacents 28 d'un alignement. Les picots 28 sont tronconiques ou en tronc de pyramide avec un méplat au sommet 29. Le sommet 31 des murets 30 est à un niveau inférieur par rapport aux sommets 29. L'écart choisi est compris entre 0,4 mm et 0,9 mm. Autrement dit, c'est aussi la différence entre leur hauteur H'1 et H'3.A portion of the pins of the first zone is represented, in fact, pins on one of the alignments of this zone. According to this embodiment, wall-shaped reliefs 30 have been disposed between the adjacent pins 28 of an alignment. The pins 28 are frustoconical or truncated pyramid with a flat at the top 29. The top 31 of the walls 30 is at a lower level with respect to the vertices 29. The difference chosen is between 0.4 mm and 0.9 mm . In other words, it is also the difference between their height H'1 and H'3.

L'épaisseur « e » des murets 30 est inférieure à celle des picots 28. C'est à dire à même hauteur, elle est inférieure au diamètre des picots. L'épaisseur des murets est ainsi inférieure de 10 à 50% par rapport à celle des picots, de façon à notamment limiter la pression de gaufrage supplémentaire résultant de la présence des murets. Leur pente est de préférence la même que celle des picots.The thickness "e" of the walls 30 is less than that of the pins 28. That is to say, same height, it is smaller than the diameter of the pins. The thickness of the walls is thus 10 to 50% lower than that of the pins, in particular to limit the additional embossing pressure resulting from the presence of low walls. Their slope is preferably the same as that of the pins.

L'écart entre les hauteurs H'1 et H'3 est suffisant pour que le caoutchouc vienne au contact de la surface supérieure 31 du muret au moment du gaufrage et ainsi conformer la feuille au muret au moins partiellement.The difference between the heights H'1 and H'3 is sufficient for the rubber to come into contact with the upper surface 31 of the wall at the time of embossing and thus to conform the sheet to the wall at least partially.

Claims (9)

  1. A multi-ply sheet for wiping comprising a first ply (12) and a second ply (14) incorporating a wet strength resin, each ply being made of tissue paper and exhibiting a specific surface weight between 12 and 35 g/m2, the first ply comprising a first embossing pattern in first zones (16) including first protrusions (18) projecting from an inner surface of the first ply and having corresponding alveoles on an opposite side, said first protrusions having tops (19) of which at least more than one is connected to an opposite inner surface of the second ply (14), and wherein said first ply (12) further comprises a second embossing pattern (36) including second protrusions projecting (38) from the inner surface of the first ply (12), said second protrusions having a height (H2) which is less than a height (H1) of said first protrusions characterized by the fact that the density of said first protrusions is less than 20/cm2, said second protrusions (38) are configured in second zones (36) and have a density greater than 30 protusions/cm2, and at least more than one top (39) of said second protrusions situated in a plane also containing tops (19) of the first protrusions (18) and is connected to an inside surface of the second ply (14), third protrusions (30) wall shaped connect two first protuberances adjacent in line.
  2. Multi-ply sheet as claimed in claim 1, wherein the first protrusions have a density of less than 12/cm2.
  3. Multi-ply sheet according to any of the preceding claims, wherein the second protrusions have a density more than 40/cm2.
  4. Sheet as claimed in claim 2 or 3, wherein the first zones and the second zones are adjacent.
  5. Sheet according to any of the preceding claims, wherein the second ply (14) is made by a through-air-drying method.
  6. Sheet according to any of the preceding claims, wherein the second ply (14) is unembossed.
  7. An embossing cylinder engraved with a pattern corresponding to a pattern of the sheet according to any of the preceding claims, wherein the cylinder comprises first embossing tips (26) constituting arrays in first zones and second embossing tips (46) of a shallower height than said first embossing tips and exhibiting a greater density per unit area, tops of the first embossing tips and of the second embossing tips being situated in a same plane extending tangentially along generatrices of the cylinder.
  8. A method for manufacturing a sheet using an assembly including the embossing cylinder of the preceding claim, wherein said method comprises embossing a first creped tissue paper ply (12) on said cylinder, applying an adhesive film onto the tops of the first protrusions and the second protrusions using an adhesive depositing cylinder, and linking said first ply to said second ply.
  9. Manufacturing method as claimed in the preceding claim, wherein said second ply (14) is unembossed.
EP01403221A 2001-12-12 2001-12-12 Multiply sheet of absorbent paper Expired - Lifetime EP1319748B9 (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
DE60133828T DE60133828T3 (en) 2001-12-12 2001-12-12 Multi-ply web of absorbent paper
PT01403221T PT1319748E (en) 2001-12-12 2001-12-12 Multiply sheet of absorbent paper
ES01403221T ES2305043T5 (en) 2001-12-12 2001-12-12 MULTIPLE ABSORBENT PAPER SHEET.
EP01403221A EP1319748B9 (en) 2001-12-12 2001-12-12 Multiply sheet of absorbent paper
DK01403221.3T DK1319748T4 (en) 2001-12-12 2001-12-12 Multilayer absorbent paper
AT01403221T ATE393856T1 (en) 2001-12-12 2001-12-12 MULTI-LAYER SHEET OF ABSORBENT PAPER
US10/498,218 US7413630B2 (en) 2001-12-12 2002-12-06 Multi-layer sheet of absorbent paper
PCT/FR2002/004215 WO2003050353A2 (en) 2001-12-12 2002-12-06 Multi-layer sheet of absorbent paper
MXPA04005261A MXPA04005261A (en) 2001-12-12 2002-12-06 Multi-layer sheet of absorbent paper.
CA2468208A CA2468208C (en) 2001-12-12 2002-12-06 Multi-layer sheet of absorbent paper
NO20033551A NO334198B1 (en) 2001-12-12 2003-08-11 Multilayer absorbent paper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP01403221A EP1319748B9 (en) 2001-12-12 2001-12-12 Multiply sheet of absorbent paper

Publications (4)

Publication Number Publication Date
EP1319748A1 EP1319748A1 (en) 2003-06-18
EP1319748B1 EP1319748B1 (en) 2008-04-30
EP1319748B2 EP1319748B2 (en) 2010-12-01
EP1319748B9 true EP1319748B9 (en) 2011-11-02

Family

ID=8183018

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01403221A Expired - Lifetime EP1319748B9 (en) 2001-12-12 2001-12-12 Multiply sheet of absorbent paper

Country Status (11)

Country Link
US (1) US7413630B2 (en)
EP (1) EP1319748B9 (en)
AT (1) ATE393856T1 (en)
CA (1) CA2468208C (en)
DE (1) DE60133828T3 (en)
DK (1) DK1319748T4 (en)
ES (1) ES2305043T5 (en)
MX (1) MXPA04005261A (en)
NO (1) NO334198B1 (en)
PT (1) PT1319748E (en)
WO (1) WO2003050353A2 (en)

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Also Published As

Publication number Publication date
EP1319748A1 (en) 2003-06-18
ES2305043T5 (en) 2011-04-15
DE60133828T2 (en) 2009-05-20
US20050034828A1 (en) 2005-02-17
NO20033551L (en) 2003-10-13
PT1319748E (en) 2008-07-29
CA2468208A1 (en) 2003-06-19
WO2003050353A2 (en) 2003-06-19
EP1319748B2 (en) 2010-12-01
DK1319748T4 (en) 2011-03-07
US7413630B2 (en) 2008-08-19
DK1319748T3 (en) 2008-09-01
ATE393856T1 (en) 2008-05-15
DE60133828D1 (en) 2008-06-12
NO334198B1 (en) 2014-01-13
NO20033551D0 (en) 2003-08-11
EP1319748B1 (en) 2008-04-30
WO2003050353A3 (en) 2008-01-03
DE60133828T3 (en) 2011-06-22
ES2305043T3 (en) 2008-11-01
CA2468208C (en) 2010-08-24
MXPA04005261A (en) 2005-03-23

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