EP1270196A1 - Method of making embossed tissue paper, embossing cylinder and product obtained - Google Patents

Method of making embossed tissue paper, embossing cylinder and product obtained Download PDF

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Publication number
EP1270196A1
EP1270196A1 EP01401741A EP01401741A EP1270196A1 EP 1270196 A1 EP1270196 A1 EP 1270196A1 EP 01401741 A EP01401741 A EP 01401741A EP 01401741 A EP01401741 A EP 01401741A EP 1270196 A1 EP1270196 A1 EP 1270196A1
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EP
European Patent Office
Prior art keywords
pins
sheet
base
embossing
paper
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.)
Granted
Application number
EP01401741A
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German (de)
French (fr)
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EP1270196B1 (en
Inventor
Michel Basler
Pierre Graff
Benoít Hoeft
Sébastien Jeannot
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
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Georgia Pacific France SAS
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Filing date
Publication date
Priority to DK01401741T priority Critical patent/DK1270196T3/en
Application filed by Georgia Pacific France SAS filed Critical Georgia Pacific France SAS
Priority to PT01401741T priority patent/PT1270196E/en
Priority to DE60118322T priority patent/DE60118322T2/en
Priority to AT01401741T priority patent/ATE321650T1/en
Priority to ES01401741T priority patent/ES2260179T3/en
Priority to EP01401741A priority patent/EP1270196B1/en
Priority to CA2391570A priority patent/CA2391570C/en
Priority to US10/179,947 priority patent/US6942755B2/en
Publication of EP1270196A1 publication Critical patent/EP1270196A1/en
Application granted granted Critical
Publication of EP1270196B1 publication Critical patent/EP1270196B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • B31F2201/0728—Material
    • 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
    • B31F2201/0707—Embossing by tools working continuously
    • B31F2201/0715—The tools being rollers
    • B31F2201/0741—Roller cooperating with a non-even counter roller
    • B31F2201/0743—Roller cooperating with a non-even counter roller having a matching profile
    • 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
    • B31F2201/0756—Characteristics of the incoming material, e.g. creped, embossed, corrugated
    • 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
    • B31F2201/0784—Auxiliary operations
    • B31F2201/0787—Applying adhesive
    • 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
    • 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
    • Y10T156/1039—Surface deformation only of sandwich or lamina [e.g., embossed panels]
    • 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 papers for sanitary use or domestic, in particular to a process for manufacturing a sheet of paper absorbent in creped cellulose wadding, having an embossing pattern.
  • the invention also relates to the product obtained by the process as well as the cylinder allowing the implementation of the process.
  • Cellulose wadding also called “tissue paper”, is a light weight absorbent paper, between 15 and 35 g / m 2 , which can be manufactured so as to have a certain elongation capacity.
  • a conventional technique consists in applying and sticking the still wet sheet on a drying cylinder, and then detaching it by means of a doctor blade to create creping undulations. Then, by the known embossing technique, one can improve or at least modify one or other of its characteristics, such as softness, flexibility, absorption, thickness or appearance. .
  • the embossing operation is carried out either on high-rate paper humidity, i.e. on paper machine in its wet part or on paper with low humidity, i.e. partly transformed dried.
  • the invention relates to embossing paper with low humidity.
  • the embossing pattern is most commonly made up of protrusions or bosses in the form of pyramids with square section or truncated cone with round or oval section, distributed evenly or not on the surface of the leaf. Note that at a protrusion on one side of the sheet corresponds a cavity on the other side.
  • a rigid cylinder with a surface spikes we generally use a rigid cylinder with a surface spikes.
  • the sheet is applied to the cylinder and pressed using of another cylinder having a coating which can deform, in rubber for example. She thus marries the relief.
  • a more or less significant deformation is obtained depending on the parameters that we have chosen, such as the flexibility of the rubber, for its ability to deform and conform to the relief of the engraving, and the pressure embossing.
  • the two cylinders have on the surface reliefs with complementary shapes, male and female.
  • the pins are produced by engraving the cylinder, for example using of a wheel itself engraved. Depending on the material used, you can also machine the pins directly.
  • the pins have a generally frustoconical shape, with circular section, oval or pyramidal with square section.
  • the half angle at the top of the cone registered is usually between 25 ° and 35 °.
  • Their size, their distribution, their density - i.e. their number on a portion of given surface - are chosen according to the desired performances for the product.
  • spikes of very low height from 0.4 to 0.6 mm distributed according to a high density pattern, more than 30 or even 80 dots per cm 2 .
  • a paper intended for wiping, household paper towel in particular, one seeks on the contrary to deform significantly the sheet to create air pockets between the folds after assembly. These pockets significantly increase the absorption capacity of "tissue paper”.
  • the height of the pins can then go up to 2.5 mm for a low pattern density, less than 10 pins per cm 2 .
  • an embossing pattern composed mainly of frustoconical pins is characterized both by the height of the latter and by its density.
  • the Applicant has set itself the objective of improving the thickness embossing, for the same pattern and for the same embossing pressure. In other words, it sought to obtain the highest possible thickness by sacrificing as little as possible in loss of resistance.
  • the Applicant has also set itself the objective of increasing the maximum embossing thickness that can be obtained for a pattern given.
  • This process in which the sheet is embossed using a embossing cylinder with at least part of its surface provided with spikes, the so-called spikes having a frustoconical base and a portion of vertex, is characterized by the fact that said vertex portion forms a flat whose surface represents from 0.01% to 75% of the smallest section of the basic portion.
  • the flat is the distal surface of the spike, usually flat or large radius of curvature.
  • the surface of the portion of vertex joining the base to the flat has a curved profile so that there is no sharp edge between the trunk and the flat.
  • the width of the flat is less than 20%. Indeed we found that the stresses applied on the sheet were better distributed when the area of the flat was reduced, taking into account the other technical imperatives such as, in particular, the need to apply a adhesive film for bonding the sheet to another sheet.
  • the surface area of the flat is reduced until it forms only one point. This mode of realization is suitable for a sheet which is not bound by the tops of protuberances.
  • the density of the pattern of pins is between 20 and 100 per cm 2 , the height of the latter being between 0.1 and 1.5 mm or more particularly between 0.1 and 0.6 mm .
  • the solution of the invention is particularly advantageous when we consider the patterns of the micro-embossing type because the fine pins have a certain perforating effect. It is therefore possible to increase the embossing pressure without risking piercing the sheet.
  • the present invention also relates to the sheet obtained according to the process.
  • a first embossed sheet is combined on pins which do not have almost no flat with a second sheet with a flat sufficient size to receive a film of glue. This solution reduces the loss of strength as much as possible on the first ply resulting from embossing.
  • FIG. 1 Schematically shown in Figure 1, an embossing installation 10 of a sheet 15.
  • a first cylinder 12 is made of steel or other rigid material and has on its surface pins 14, the size of which is exaggerated in the figure.
  • a cylinder 11 made of rubber or any material liable to deform under pressure is rotatably mounted parallel to the first cylinder 12 with a certain tightening. It involves between the two cylinders a cellulose wadding sheet to be embossed.
  • the sheet 15 can be a single ply, but it can also be composed of two or more plies superimposed. Each of the plies is made of creped cellulose wadding, with a grammage between 15 and 35 g / m 2 . The creping rate is sufficient to authorize the embossing treatment.
  • the sheet is deformed by the pins, the shape of which it follows.
  • Figures 2a and 2b represent the pins 14 on the surface of the cylinder.
  • Figure 2a is a view from above, partial and developed, of the surface of the engraved cylinder 12.
  • the pins 14 arranged in this example in a staggered pattern of not walking direction and cross direction determined. Being a very motive dense, the steps are respectively 1.75 mm and 1.4 mm for a height of 0.5 mm pin.
  • the pin 14 is shown in transparency in FIG. 3; there are two parts: a base 14a and a top portion 14b.
  • the base 14a is frustoconical with axis ab.
  • the half angle at the top of the surface tapered here is 30 °.
  • This part 14a is extended by a portion of vertex 14b which forms a flat 14c at its summit. Between the flat 14c and the base 14a, the portion 14b has a curved profile 14d. It could be advantageously of an arc of a circle. Preferably the profile 14d is tangent to the truncated cone 14a along the virtual dividing line 14e between the two parts 14a and 14b. According to the invention, the area of the flat 14c is at most equal to 75% of the area delimited by the closed line 14e. Of preferably, it is less than 20% of the surface delimited by 14e. he can even be advantageous to reduce the flat to a point, represented by the value 0.01%.
  • impressions were made dynamically at a machine speed of 50m / min. on a sheet of carbonless paper.
  • This imprint is shown in Figure 4a.
  • impressions were made of an identical pattern with the difference that the tops of the pins were of the standard type with a flat corresponding to that of the truncated cone. the characteristics of such a pattern are as follows: 80 spikes / cm 2 , 0.5 mm in height and spikes in a truncated cone, the flat of which is a disk with a radius of 0.2 mm.
  • the imprint is shown in Figure 4b. Note that the fingerprints of the pins according to the invention are reduced to a point while those of the pins of the prior art are different. The prints form a ring. The entire periphery of the peaks seems crushed.
  • An embossing pressure corresponds to a width of the rubber mark on the steel cylinder. It is therefore commonly defined in the technical field of the invention, the level of embossing pressure by the width of this mark, also called imprint. There are thus five fingerprints: 20, 25, 30, 35 and 39 mm. Then we glued a fold thus embossed with a fold of the same cellulose wadding but not embossed (column I1). By way of comparison, a product with the same structure but embossed with a pattern from the prior art (column A1) was manufactured.
  • A2 Thickness in mm A2 Cross direction resistance ST in N / m I2 Thickness in mm I2 Cross direction resistance ST in N / m 20 0.28 102 0.31 97 25 0.33 96 0.35 90 30 0.37 84 0.41 78 35 0.42 75 0.45 74 39 0.42 68 0.46 70
  • FIG 5 there is shown an installation for make a multi-ply sheet of which at least one ply is embossed according to the method of the invention.
  • a first embossing unit with a engraved cylinder 112 and a rubber-coated cylinder 111 and a second embossing unit 112 'and 111'.
  • a gluing device applies glue on the tops of the protrusions of one of the two units.
  • one or both of the spike units can be fitted according to the invention.

Abstract

The method for making the sheet comprises embossing it on an embossing cylinder having a part of its surface provided with picots. The picot has a truncated base (14a) and a top portion (14b) having a flat (14c). Independent claims are included for a sheet obtained using the method and an embossing cylinder

Description

L'invention se rapporte au domaine des papiers à usage sanitaire ou domestique, notamment à un procédé de fabrication d'une feuille de papier absorbant en ouate de cellulose crêpée, comportant un motif de gaufrage. L'invention vise également le produit obtenu par le procédé ainsi que le cylindre permettant la mise en oeuvre du procédé.The invention relates to the field of papers for sanitary use or domestic, in particular to a process for manufacturing a sheet of paper absorbent in creped cellulose wadding, having an embossing pattern. The invention also relates to the product obtained by the process as well as the cylinder allowing the implementation of the process.

L'ouate de cellulose, appelée également « papier tissu » est un papier absorbant de faible grammage, entre 15 et 35 g/m2, qui peut être fabriqué de manière à présenter une certaine capacité d'allongement. Une technique conventionnelle consiste à appliquer et coller la feuille encore humide sur un cylindre sécheur, et à l'en détacher ensuite au moyen d'une lame formant racle pour créer des ondulations de crêpage. Ensuite, par la technique connue du gaufrage, on peut en améliorer ou à tout le moins, modifier l'une ou l'autre de ses caractéristiques, telles que la douceur, la souplesse, l'absorption, l'épaisseur ou l'aspect.Cellulose wadding, also called “tissue paper”, is a light weight absorbent paper, between 15 and 35 g / m 2 , which can be manufactured so as to have a certain elongation capacity. A conventional technique consists in applying and sticking the still wet sheet on a drying cylinder, and then detaching it by means of a doctor blade to create creping undulations. Then, by the known embossing technique, one can improve or at least modify one or other of its characteristics, such as softness, flexibility, absorption, thickness or appearance. .

L'opération de gaufrage s'effectue soit sur du papier à fort taux d'humidité, c'est à dire sur machine à papier dans sa partie humide soit sur du papier à faible taux d'humidité, c'est à dire en transformation en partie sèche. L'invention concerne le gaufrage du papier à faible taux d'humidité. Le motif de gaufrage est le plus communément constitué de protubérances ou bossages en forme de pyramides à section carrée ou de tronc de cône à section ronde ou ovale, répartis régulièrement ou non à la surface de la feuille. On notera qu'à une protubérance sur une face de la feuille correspond une cavité sur l'autre face.The embossing operation is carried out either on high-rate paper humidity, i.e. on paper machine in its wet part or on paper with low humidity, i.e. partly transformed dried. The invention relates to embossing paper with low humidity. The embossing pattern is most commonly made up of protrusions or bosses in the form of pyramids with square section or truncated cone with round or oval section, distributed evenly or not on the surface of the leaf. Note that at a protrusion on one side of the sheet corresponds a cavity on the other side.

Pour gaufrer l'ouate de cellulose, conformément à une première technique, on utilise généralement un cylindre rigide présentant en surface des picots. On applique la feuille sur le cylindre et on la presse au moyen d'un autre cylindre présentant un revêtement pouvant se déformer, en caoutchouc par exemple. Elle en épouse ainsi le relief. Pour un même motif, on obtient une déformation plus ou moins importante selon les paramètres que l'on a choisis, tels la souplesse du caoutchouc, pour sa capacité à se déformer et se conformer au relief de la gravure, et la pression de gaufrage. For embossing cellulose wadding, in accordance with a first technique, we generally use a rigid cylinder with a surface spikes. The sheet is applied to the cylinder and pressed using of another cylinder having a coating which can deform, in rubber for example. She thus marries the relief. For the same pattern, a more or less significant deformation is obtained depending on the parameters that we have chosen, such as the flexibility of the rubber, for its ability to deform and conform to the relief of the engraving, and the pressure embossing.

Selon une autre technique, les deux cylindres comportent en surface des reliefs avec des formes complémentaires, mâles et femelles.According to another technique, the two cylinders have on the surface reliefs with complementary shapes, male and female.

On réalise les picots en gravant le cylindre, par exemple au moyen d'une molette elle-même gravée. Selon le matériau employé, on peut aussi usiner directement les picots.The pins are produced by engraving the cylinder, for example using of a wheel itself engraved. Depending on the material used, you can also machine the pins directly.

Les picots ont une forme générale tronconique, à section circulaire, ovale ou pyramidale à section carrée. Le demi-angle au sommet du cône inscrit est usuellement compris entre 25° et 35°. Leur dimension, leur répartition, leur densité - c'est à dire leur nombre sur une portion de surface donnée - sont choisies en fonction des performances recherchées pour le produit.The pins have a generally frustoconical shape, with circular section, oval or pyramidal with square section. The half angle at the top of the cone registered is usually between 25 ° and 35 °. Their size, their distribution, their density - i.e. their number on a portion of given surface - are chosen according to the desired performances for the product.

Par exemple, lorsqu'on souhaite donner un aspect textile à la feuille et l'assouplir sans rechercher particulièrement à améliorer sa capacité d'absorption, on choisit des picots de très faible hauteur : de 0,4 à 0,6 mm répartis selon un motif de densité élevée, plus de 30, voire 80 picots par cm2. En revanche pour un papier destiné à l'essuyage, essuie-tout ménager notamment, on cherche au contraire à déformer de façon importante la feuille pour créer des poches d'air entre les plis après assemblage. Ces poches accroissent de façon sensible la capacité d'absorption du « papier tissu ». La hauteur des picots peut alors aller jusqu'à 2,5 mm pour une densité de motif faible, inférieure à 10 picots par cm2. Ainsi un motif de gaufrage composé en majeure partie de picots tronconiques se caractérise à la fois par la hauteur de ces derniers et par sa densité.For example, when one wishes to give a textile appearance to the sheet and to soften it without seeking in particular to improve its absorption capacity, one chooses spikes of very low height: from 0.4 to 0.6 mm distributed according to a high density pattern, more than 30 or even 80 dots per cm 2 . On the other hand for a paper intended for wiping, household paper towel in particular, one seeks on the contrary to deform significantly the sheet to create air pockets between the folds after assembly. These pockets significantly increase the absorption capacity of "tissue paper". The height of the pins can then go up to 2.5 mm for a low pattern density, less than 10 pins per cm 2 . Thus, an embossing pattern composed mainly of frustoconical pins is characterized both by the height of the latter and by its density.

En déformant la feuille au-delà de sa limite de déformation élastique, on détruit toujours une partie des liaisons entre les fibres du papier. Toute opération de gaufrage entraíne donc une diminution de sa résistance à la déchirure. En revanche, le nombre de liaisons ayant diminué, la feuille est plus souple.By deforming the sheet beyond its elastic deformation limit, part of the bonds between the paper fibers is always destroyed. all embossing operation therefore results in a decrease in its resistance to tear. On the other hand, the number of connections having decreased, the sheet is more flexible.

Lorsque l'on gaufre de l'ouate de cellulose au moyen d'une unité de gaufrage constituée d'un cylindre gravé et d'un cylindre en caoutchouc, la déformation de la feuille, donc son épaisseur, dépend de la pression exercée par ce dernier. Pour un même motif, la perte de résistance à la déchirure est donc liée à l'épaisseur du gaufrage obtenu, et croít avec elle. Cela est particulièrement vrai pour les valeurs maximales. A une valeur maximale d'épaisseur correspond la perte de résistance maximale. When embossing cellulose wadding using a unit of embossing consisting of an engraved cylinder and a rubber cylinder, the deformation of the sheet, therefore its thickness, depends on the pressure exerted by the latter. For the same reason, the loss of tear resistance is therefore related to the thickness of the embossing obtained, and increases with it. That is particularly true for maximum values. Has a maximum value thickness corresponds to the maximum resistance loss.

La Demanderesse s'est fixé comme objectif d'améliorer l'épaisseur du gaufrage, pour un même motif et pour une même pression de gaufrage. Autrement dit, elle a cherché à obtenir l'épaisseur la plus élevée possible en sacrifiant le moins possible en perte de résistance.The Applicant has set itself the objective of improving the thickness embossing, for the same pattern and for the same embossing pressure. In other words, it sought to obtain the highest possible thickness by sacrificing as little as possible in loss of resistance.

La Demanderesse s'est fixé également comme objectif d'augmenter l'épaisseur de gaufrage maximale qu'il est possible d'obtenir pour un motif donné.The Applicant has also set itself the objective of increasing the maximum embossing thickness that can be obtained for a pattern given.

Grâce au procédé de fabrication conforme à l'invention on atteint ces objectifs. Ce procédé, selon lequel on gaufre la feuille au moyen d'un cylindre de gaufrage avec au moins une partie de sa surface pourvue de picots, les dits picots comportant une base tronconique et une portion de sommet, est caractérisé par le fait que la dite portion de sommet forme un méplat dont la surface représente de 0,01 % à 75 % de la plus petite section de la portion de base.Thanks to the manufacturing process according to the invention, these Goals. This process, in which the sheet is embossed using a embossing cylinder with at least part of its surface provided with spikes, the so-called spikes having a frustoconical base and a portion of vertex, is characterized by the fact that said vertex portion forms a flat whose surface represents from 0.01% to 75% of the smallest section of the basic portion.

Le méplat est la surface distale du picot, généralement plane ou à grand rayon de courbure.The flat is the distal surface of the spike, usually flat or large radius of curvature.

Conformément à une autre caractéristique, la surface de la portion de sommet joignant la base au méplat a un profil courbe de façon qu'il n'y ait pas d'arête vive entre le tronc et le méplat.According to another characteristic, the surface of the portion of vertex joining the base to the flat has a curved profile so that there is no sharp edge between the trunk and the flat.

En particulier, la largeur du méplat est inférieure à 20 %. En effet on a constaté que les contraintes appliquées sur la feuille étaient mieux réparties lorsqu'on réduisait la surface du méplat, compte tenu des autres impératifs techniques tels que, notamment, la nécessité d'appliquer une pellicule d'adhésif permettant de lier la feuille à une autre feuille. Conformément à un mode de réalisation particulier de l'invention, la surface du méplat est réduite jusqu'à ne former qu'un point. Ce mode de réalisation convient à une feuille qui n'est pas liée par les sommets des protubérances.In particular, the width of the flat is less than 20%. Indeed we found that the stresses applied on the sheet were better distributed when the area of the flat was reduced, taking into account the other technical imperatives such as, in particular, the need to apply a adhesive film for bonding the sheet to another sheet. In accordance with a particular embodiment of the invention, the surface area of the flat is reduced until it forms only one point. This mode of realization is suitable for a sheet which is not bound by the tops of protuberances.

On connaít le brevet US 3414459 qui décrit une feuille de papier à deux plis gaufrés, disposés de telle façon que les protubérances sont placées pointe contre pointe. Sur les figures du brevet, on a représenté les picots gravés à la surface des cylindres de gaufrage. Ces picots ont une forme cylindrique de section sensiblement rectangulaire, avec deux faces planes parallèles orientées dans le sens marche de la machine. Le sommet des picots est plat et présente une partie arrondie. Il apparaít que les rayons de courbure aussi bien sens marche que sens travers indiqués sur les figures sont différents. On observe que la forme parallélépipédique des picots entraíne des efforts de cisaillement sur la feuille qui contribuent à un affaiblissement important de sa résistance. L'invention au contraire par la forme optimale du picot permet une amélioration des caractéristiques de la feuille.We know US Patent 3414459 which describes a sheet of paper to two embossed folds, arranged so that the protrusions are placed point against point. In the patent figures, the pins engraved on the surface of the embossing cylinders. These pins have a cylindrical shape of substantially rectangular section, with two faces parallel planes oriented in the machine running direction. The top spikes is flat and has a rounded part. It appears that the rays of curvature in both direction and cross direction indicated in the figures are different. We observe that the parallelepiped shape of the pins causes shear forces on the sheet which contribute to a significant weakening of its resistance. The invention, on the contrary, by optimal shape of the pin allows an improvement in the characteristics of the leaf.

Les avantages apportés par le procédé sont également d'ordre industriel. Pour une même installation, en utilisant les picots de l'invention, on peut obtenir jusqu'à 15% d'épaisseur en plus à pression de gaufrage égale. Il s'ensuit une exploitation industrielle plus facile car on peut alors réduire cette pression. Le caoutchouc s'use moins. Inversement on dispose d'une réserve d'épaisseur plus importante en cas de besoin.The advantages brought by the process are also of order industrial. For the same installation, using the pins of the invention, you can get up to 15% more thickness at embossing pressure equal. It follows an easier industrial exploitation because one can then reduce this pressure. The rubber wears less. Conversely, we have a greater thickness reserve if necessary.

Conformément à une autre caractéristique, la densité du motif de picots est comprise entre 20 et 100 par cm2, la hauteur de ces derniers étant comprise entre 0,1 et 1,5 mm ou plus particulièrement entre 0,1 et 0,6 mm. En effet, la solution de l'invention est particulièrement avantageuse quand on considère les motifs du type à micro-gaufrage car les picots fins ont un certain effet perforant. On peut donc augmenter la pression de gaufrage sans risquer de percer la feuille.According to another characteristic, the density of the pattern of pins is between 20 and 100 per cm 2 , the height of the latter being between 0.1 and 1.5 mm or more particularly between 0.1 and 0.6 mm . Indeed, the solution of the invention is particularly advantageous when we consider the patterns of the micro-embossing type because the fine pins have a certain perforating effect. It is therefore possible to increase the embossing pressure without risking piercing the sheet.

La présente invention vise également la feuille obtenue selon le procédé. En particulier, conformément à une caractéristique de l'invention, on combine une première feuille gaufrée sur des picots ne présentant quasiment pas de méplat avec une deuxième feuille présentant un méplat de dimension suffisante pour recevoir une pellicule de colle. Cette solution permet de réduire au maximum sur le premier pli la perte de résistance résultant du gaufrage.The present invention also relates to the sheet obtained according to the process. In particular, in accordance with a characteristic of the invention, a first embossed sheet is combined on pins which do not have almost no flat with a second sheet with a flat sufficient size to receive a film of glue. This solution reduces the loss of strength as much as possible on the first ply resulting from embossing.

D'autres caractéristiques et avantages apparaítront à la lecture de la description qui suit d'un mode de réalisation de l'invention, en référence aux dessins sur lesquels :

  • La figure 1 représente schématiquement une installation de gaufrage permettant de mettre en oeuvre le procédé de l'invention.
  • La figure 2a représente des picots conformes à l'invention, sur une partie de la surface du cylindre gravé, vus de dessus.
  • La figure 2b est une vue selon la coupe AA de la figure 2a.
  • La figure 3 est une représentation en perspective d'un picot conforme à l'invention.
  • La figure 4a représente l'empreinte du motif de l'invention sur une feuille sensible à la pression.
  • La figure 4b représente l'empreinte d'un motif de l'art antérieur sur une feuille sensible à la pression.
  • La figure 5 représente une installation permettant de réaliser une feuille multipli.
    • Other characteristics and advantages will appear on reading the following description of an embodiment of the invention, with reference to the drawings in which:
  • Figure 1 schematically shows an embossing installation for implementing the method of the invention.
  • FIG. 2a represents pins according to the invention, on a part of the surface of the engraved cylinder, seen from above.
  • Figure 2b is a view along section AA of Figure 2a.
  • Figure 3 is a perspective representation of a pin according to the invention.
  • FIG. 4a represents the imprint of the motif of the invention on a pressure-sensitive sheet.
  • Figure 4b shows the imprint of a pattern of the prior art on a pressure-sensitive sheet.
  • FIG. 5 represents an installation making it possible to produce a multi-ply sheet.

    • On a représenté schématiquement sur la figure 1, une installation de gaufrage 10 d'une feuille 15. Un premier cylindre 12 est en acier ou autre matériau rigide et comporte à sa surface des picots 14, dont la taille est exagérée sur la figure. Un cylindre 11 en caoutchouc ou tout matériau susceptible de se déformer sous la pression est monté rotatif parallèlement au premier cylindre 12 avec un certain serrage. On entraíne entre les deux cylindres une feuille d'ouate de cellulose à gaufrer. La feuille 15 peut être à un seul pli, mais elle peut aussi être composée de deux plis ou plus superposés. Chacun des plis est en ouate de cellulose crêpée, de grammage compris entre 15 et 35 g/m2. Le taux de crêpage est suffisant pour autoriser le traitement de gaufrage. Au niveau de l'intervalle entre les eux cylindres, la feuille est déformée par les picots dont elle épouse la forme.Schematically shown in Figure 1, an embossing installation 10 of a sheet 15. A first cylinder 12 is made of steel or other rigid material and has on its surface pins 14, the size of which is exaggerated in the figure. A cylinder 11 made of rubber or any material liable to deform under pressure is rotatably mounted parallel to the first cylinder 12 with a certain tightening. It involves between the two cylinders a cellulose wadding sheet to be embossed. The sheet 15 can be a single ply, but it can also be composed of two or more plies superimposed. Each of the plies is made of creped cellulose wadding, with a grammage between 15 and 35 g / m 2 . The creping rate is sufficient to authorize the embossing treatment. At the interval between the cylinders, the sheet is deformed by the pins, the shape of which it follows.

    En référence aux figures 2 et 3, on décrit ci-après un exemple de réalisation de picots conformes à l'invention. Les figures 2a et 2b représentent les picots 14 à la surface du cylindre. La figure 2a est une vue de dessus, partielle et développée, de la surface du cylindre gravé 12. On y voit les picots 14 disposés dans cet exemple selon un motif en quinconce de pas sens marche et sens travers déterminés. S'agissant d'un motif très dense, les pas sont respectivement 1,75 mm et 1,4 mm pour une hauteur de picot de 0,5 mm. Le picot 14 est représenté en transparence sur la figure 3 ; on distingue deux parties : une base 14a et une portion de sommet 14b. La base 14a est tronconique d'axe ab. Le demi angle au sommet de la surface tronconique est ici de 30°. Cette partie 14a est prolongée par une portion de sommet 14b qui forme un méplat 14c à son sommet. Entre le méplat 14c et la base 14a, la portion 14b a un profil 14d courbe. Il peut s'agir avantageusement d'un arc de cercle. De préférence le profil 14d est tangent au tronc de cône 14a le long de la ligne de séparation virtuelle 14e entre les deux parties 14a et 14b. Conformément à l'invention, l'aire du méplat 14c est au plus égale à 75% de la surface délimitée par la ligne fermée 14e. De préférence, elle est inférieure à 20% de la surface délimitée par 14e. Il peut être même avantageux de réduire le méplat à un point, représenté par la valeur 0,01%. En effet, sans être lié par cette hypothèse, on pense qu'en réduisant la surface au sommet, on permet au caoutchouc pressant la feuille de se déformer progressivement le long du picot, assurant une déformation plus homogène de celle-ci. Il s'ensuit qu'il se forme moins de zones de faiblesse de la feuille. La perte de résistance est donc plus faible.With reference to Figures 2 and 3, an example of production of pins in accordance with the invention. Figures 2a and 2b represent the pins 14 on the surface of the cylinder. Figure 2a is a view from above, partial and developed, of the surface of the engraved cylinder 12. There sees the pins 14 arranged in this example in a staggered pattern of not walking direction and cross direction determined. Being a very motive dense, the steps are respectively 1.75 mm and 1.4 mm for a height of 0.5 mm pin. The pin 14 is shown in transparency in FIG. 3; there are two parts: a base 14a and a top portion 14b. The base 14a is frustoconical with axis ab. The half angle at the top of the surface tapered here is 30 °. This part 14a is extended by a portion of vertex 14b which forms a flat 14c at its summit. Between the flat 14c and the base 14a, the portion 14b has a curved profile 14d. It could be advantageously of an arc of a circle. Preferably the profile 14d is tangent to the truncated cone 14a along the virtual dividing line 14e between the two parts 14a and 14b. According to the invention, the area of the flat 14c is at most equal to 75% of the area delimited by the closed line 14e. Of preferably, it is less than 20% of the surface delimited by 14e. he can even be advantageous to reduce the flat to a point, represented by the value 0.01%. Indeed, without being bound by this hypothesis, we think that reducing the surface at the top, the rubber pressing sheet is allowed gradually deform along the spike, ensuring deformation more homogeneous of it. As a result, less areas of weakness of the leaf. The loss of resistance is therefore lower.

    Afin de confirmer ce résultat, on a réalisé plusieurs essais.In order to confirm this result, several tests were carried out.

    On a effectué un premier essai visuel sur une machine pilote avec un cylindre portant des picots selon l'exemple mentionné ci-dessus, soit :

    • 80 picots /m2,
    • 0,5 mm de hauteur,
    • une portion de sommet en forme de dôme de rayon 0,2 mm.
    A first visual test was carried out on a pilot machine with a cylinder carrying spikes according to the example mentioned above, namely:
    • 80 pins / m 2 ,
    • 0.5 mm high,
    • a dome-shaped apex portion with a radius of 0.2 mm.

    On a réalisé des empreintes en dynamique à une vitesse machine de 50m/min. sur une feuille de papier autocopiant. Cette empreinte est représentée sur la figure 4a. En comparaison on a réalisé des empreintes d'un motif identique avec cette différence que les sommets des picots étaient de type standard avec un méplat correspondant à celui du tronc de cône . les caractéristiques d'un tel motif sont les suivantes : 80 picots/cm2, 0,5 mm de hauteur et des picots en tronc de cône dont le méplat est un disque de rayon 0,2 mm. L'empreinte est montrée sur la figure 4b. On remarque que les empreintes des picots conformes à l'invention sont réduites à un point alors que celles des picots de l'art antérieur sont différentes. Les empreintes forment un anneau. Toute la périphérie des sommets paraít écrasée.Impressions were made dynamically at a machine speed of 50m / min. on a sheet of carbonless paper. This imprint is shown in Figure 4a. In comparison, impressions were made of an identical pattern with the difference that the tops of the pins were of the standard type with a flat corresponding to that of the truncated cone. the characteristics of such a pattern are as follows: 80 spikes / cm 2 , 0.5 mm in height and spikes in a truncated cone, the flat of which is a disk with a radius of 0.2 mm. The imprint is shown in Figure 4b. Note that the fingerprints of the pins according to the invention are reduced to a point while those of the pins of the prior art are different. The prints form a ring. The entire periphery of the peaks seems crushed.

    On a réalisé d'autres essais comparatifs avec les mêmes motifs, à plusieurs pressions de gaufrage. A une pression de gaufrage correspond une largeur de la marque du caoutchouc sur le cylindre acier. On définit donc communément dans le domaine technique de l'invention, le niveau de pression de gaufrage par la largeur de cette marque, appelée également empreinte. On a ainsi cinq empreintes : 20, 25, 30, 35 et 39 mm. Ensuite on a collé un pli ainsi gaufré avec un pli de la même ouate de cellulose mais non gaufré (colonne I1). A titre de comparaison, on a fabriqué un produit de même structure mais gaufré avec un motif de l'art antérieur (colonne A1). Le tableau ci-dessous montre que pour une même empreinte, c'est à dire pour un même réglage de machine, on obtient un produit (colonne I1) présentant une épaisseur supérieure à celle d'un produit fabriqué selon l'art antérieur (colonne A1). Cela implique comme avantage par exemple, que l'on peut diminuer la charge sur les cylindres. Il s'ensuit alors une moindre usure du caoutchouc notamment.
    Par ailleurs, au réglage maximal de la pression, soit à une empreinte de 39 mm, on obtient 10 à 15% de plus d'épaisseur avec les picots de l'invention. On dispose ainsi d'un potentiel d'épaisseur supplémentaire avec ces derniers. En outre pour une même valeur de la résistance sens travers, on obtient plus d'épaisseur en particulier pour les épaisseurs les plus élevées. Enfin, pour des épaisseurs égales, on obtient un papier gaufré plus résistant. Empreinte en mm A1 Epaisseur en mm A1 Résistance sens travers ST en N /m I1 Epaisseur en mm I1 Résistance sens travers ST en N/m 20 0,27 116 0,29 114 25 0,31 107 0,34 102 30 0,35 102 0,40 93 35 0,41 90 0,45 86 39 0,42 84 0,48 82 On a réalisé les mêmes essais dans les mêmes conditions mais cette fois-ci en associant un pli gaufré à un pli non gaufré par moletage. On constate avec le tableau ci-dessous que l'on obtient des résultats semblables : colonne A2 pour le produit de l'art antérieur, colonne 12 pour le produit fabriqué conformément à l'invention. Empreinte en mm. A2 Epaisseur en mm A2 Résistance sens travers ST en N /m I2 Epaisseur en mm I2 Résistance sens travers ST en N/m 20 0,28 102 0,31 97 25 0,33 96 0,35 90 30 0,37 84 0,41 78 35 0,42 75 0,45 74 39 0,42 68 0,46 70     Other comparative tests were carried out with the same patterns, at several embossing pressures. An embossing pressure corresponds to a width of the rubber mark on the steel cylinder. It is therefore commonly defined in the technical field of the invention, the level of embossing pressure by the width of this mark, also called imprint. There are thus five fingerprints: 20, 25, 30, 35 and 39 mm. Then we glued a fold thus embossed with a fold of the same cellulose wadding but not embossed (column I1). By way of comparison, a product with the same structure but embossed with a pattern from the prior art (column A1) was manufactured. The table below shows that for the same footprint, that is to say for the same machine setting, a product is obtained (column I1) having a thickness greater than that of a product manufactured according to the prior art (column A1). This implies as an advantage, for example, that the load on the cylinders can be reduced. This results in less wear of the rubber in particular.
    Furthermore, at the maximum pressure setting, ie at a footprint of 39 mm, 10 to 15% more thickness is obtained with the pins of the invention. There is thus a potential for additional thickness with these. In addition, for the same cross resistance value, more thickness is obtained, in particular for the higher thicknesses. Finally, for equal thicknesses, a more resistant embossed paper is obtained. Footprint in mm A1 Thickness in mm A1 Cross direction resistance ST in N / m I1 Thickness in mm I1 Cross direction resistance ST in N / m 20 0.27 116 0.29 114 25 0.31 107 0.34 102 30 0.35 102 0.40 93 35 0.41 90 0.45 86 39 0.42 84 0.48 82 The same tests were carried out under the same conditions but this time by associating an embossed ply with an unembossed ply by knurling. It can be seen from the table below that similar results are obtained: column A2 for the product of the prior art, column 12 for the product produced in accordance with the invention. Footprint in mm. A2 Thickness in mm A2 Cross direction resistance ST in N / m I2 Thickness in mm I2 Cross direction resistance ST in N / m 20 0.28 102 0.31 97 25 0.33 96 0.35 90 30 0.37 84 0.41 78 35 0.42 75 0.45 74 39 0.42 68 0.46 70

    Sur la figure 5, on a représenté une installation permettant de fabriquer une feuille multi-pli dont au moins un pli est gaufré selon le procédé de l'invention. On dispose une première unité de gaufrage avec un cylindre gravé 112 et un cylindre à revêtement en caoutchouc 111 et une seconde unité de gaufrage 112' et 111'. Un dispositif d'encollage applique la colle sur les sommets des protubérances de l'une des deux unités. On comprend que l'on peut équiper l'une ou les deux unités de picots conformes à l'invention. Pour tirer parti au mieux des avantages de l'invention, on peut par exemple dans le cas d'un essuie-tout ménager adapter des picots à sommet entièrement arrondi sur l'unité (111/112) qui ne reçoit pas la colle et conserver une certaine surface aux méplats de l'unité 111'/112' qui reçoit la colle.In Figure 5, there is shown an installation for make a multi-ply sheet of which at least one ply is embossed according to the method of the invention. We have a first embossing unit with a engraved cylinder 112 and a rubber-coated cylinder 111 and a second embossing unit 112 'and 111'. A gluing device applies glue on the tops of the protrusions of one of the two units. We understands that one or both of the spike units can be fitted according to the invention. To make the most of the benefits of the invention, for example in the case of a household paper towel fit pins with a fully rounded top on the unit (111/112) which does not receive the glue and keep a certain area on the flats of unit 111 '/ 112' which receives the glue.

    Claims (16)

    Procédé pour fabriquer une feuille de papier tissu par lequel on gaufre celle-ci au moyen d'un cylindre de gaufrage avec au moins une partie de sa surface pourvue de picots, lesdits picots comportant une portion de base tronconique et une portion de sommet, caractérisé par le fait que la dite portion de sommet forme un méplat dont la surface représente moins de 75% de la plus petite section de la portion de base.Method for manufacturing a sheet of tissue paper by which it is embossed by means of an embossing cylinder with at least part of its surface provided with pins, said pins having a frustoconical base portion and an apex portion, characterized by the fact that said top portion forms a flat whose surface represents less than 75% of the smallest section of the base portion. Procédé selon la revendication précédente, caractérisé par le fait que la surface du méplat représente moins de 20% de la surface de la plus petite section de la base.Method according to the preceding claim, characterized in that the surface of the flat represents less than 20% of the surface of the smallest section of the base. Procédé selon la revendication précédente, caractérisé par le fait que le profil de la portion de sommet entre la base et le méplat est une courbe convexe.Method according to the preceding claim, characterized in that the profile of the crown portion between the base and the flat is a convex curve. Procédé selon la revendication précédente, caractérisé par le fait que ledit profil est en arc de cercle.Method according to the preceding claim, characterized in that the said profile is in an arc. Procédé selon l'une des revendications précédentes, caractérisé par le fait que le demi-angle au sommet de la surface tronconique de la base est compris entre 25° et 35°.Method according to one of the preceding claims, characterized in that the half-angle at the top of the frustoconical surface of the base is between 25 ° and 35 °. Procédé selon la revendication précédente, caractérisé par le fait que ledit profil est un demi-cercle.Method according to the preceding claim, characterized in that the said profile is a semicircle. Procédé selon l'une des revendications précédentes, caractérisé par le fait que la surface de la base est tangente à ladite portion de sommet.Method according to one of the preceding claims, characterized in that the surface of the base is tangent to said vertex portion. Procédé selon l'une des revendications précédentes, caractérisé par le fait que la base est à section circulaire.Method according to one of the preceding claims, characterized in that the base is of circular section. Procédé selon l'une des revendications précédentes, caractérisé par le fait que la densité du motif de picots est comprise entre 20 et 100 par cm2, leur hauteur étant comprise entre 0,1 et 1,5 mm.Method according to one of the preceding claims, characterized in that the density of the pattern of spikes is between 20 and 100 per cm 2 , their height being between 0.1 and 1.5 mm. Procédé selon la revendication précédente, caractérisé par le fait que la hauteur des picots est comprise entre 0,1 et 0,6 mm. Method according to the preceding claim, characterized in that the height of the pins is between 0.1 and 0.6 mm. Procédé selon l'une des revendications 1 à 8, caractérisé par le fait que la densité du motif des picots est comprise entre 4 et 20 par cm2 ; leur hauteur étant comprise entre 1 et 2, 5 mm.Method according to one of claims 1 to 8, characterized in that the density of the pattern of the pins is between 4 and 20 per cm 2 ; their height being between 1 and 2.5 mm. Feuille de papier, obtenue selon le procédé de l'une des revendications 9 et 10, avec des protubérances formées par lesdits picots, caractérisée par le fait qu'elle comprend, sur au moins 50% de sa surface, des protubérances dont la surface unitaire est comprise entre 0,3 mm2 et 2 mm2, le nombre de protubérances étant compris entre 20 et 100 par cm2.Sheet of paper, obtained according to the method of one of Claims 9 and 10, with protuberances formed by said pins, characterized in that it comprises, on at least 50% of its surface, protuberances whose unitary surface is between 0.3 mm 2 and 2 mm 2 , the number of protrusions being between 20 and 100 per cm 2 . Feuille de papier à usage notamment d'essuie-tout, obtenue selon le procédé de la revendication 11, avec des protubérances formées par lesdits picots, caractérisée par le fait qu'elle comprend, sur au moins 50% de sa surface, des protubérances dont la surface unitaire est comprise entre 0,3 mm2 et 4 mm2, le nombre de protubérances étant compris entre 4 et 20 par cm2.Sheet of paper used in particular for paper towels, obtained according to the method of claim 11, with protuberances formed by said pins, characterized in that it comprises, on at least 50% of its surface, protuberances of which the unit surface is between 0.3 mm 2 and 4 mm 2 , the number of protrusions being between 4 and 20 per cm 2 . Feuille de papier, obtenue selon le procédé de l'une des revendications 1 à 11, avec des protubérances formées par lesdits picots ou selon les revendications 12 et 13, caractérisée par le fait qu'elle est associée à au moins une autre feuille pour former un produit multi-pli.Sheet of paper, obtained according to the method of one of Claims 1 to 11, with protuberances formed by said pins or according to Claims 12 and 13, characterized in that it is associated with at least one other sheet to form a multi-ply product. Feuille selon la revendication précédente, caractérisée par le fait que ladite autre feuille est gaufrée selon un motif différent dudit motif.Sheet according to the preceding claim, characterized in that the said other sheet is embossed in a pattern different from the said pattern. Cylindre de gaufrage pour mettre en oeuvre le procédé selon l'une des revendications 1 à 11, caractérisé par le fait qu'il comporte des picots avec une base de forme tronconique et une portion de sommet, ce dernier présentant un méplat dont la surface représente moins de 75% et de préférence moins de 20% de la section tronconique.Embossing cylinder for implementing the method according to one of Claims 1 to 11, characterized in that it comprises pins with a frustoconical base and a crown portion, the latter having a flat whose surface represents less than 75% and preferably less than 20% of the frustoconical section.
    EP01401741A 2001-06-29 2001-06-29 Method of making embossed tissue paper and embossing cylinder Expired - Lifetime EP1270196B1 (en)

    Priority Applications (8)

    Application Number Priority Date Filing Date Title
    PT01401741T PT1270196E (en) 2001-06-29 2001-06-29 PROCESS FOR THE MANUFACTURE OF A COTTON SHEET OF CELLULOSE, CELLULOSE, GOFRADA, AND GRINDING CYLINDER
    DE60118322T DE60118322T2 (en) 2001-06-29 2001-06-29 Method for producing embossed paper and embossing cylinder
    AT01401741T ATE321650T1 (en) 2001-06-29 2001-06-29 METHOD FOR PRODUCING EMBOSSED PAPER AND EMBOSSING CYLINDER
    ES01401741T ES2260179T3 (en) 2001-06-29 2001-06-29 MANUFACTURING PROCEDURE OF A GOFRADA CELLULOSE GUATA SHEET AND GOFRADO CYLINDER.
    DK01401741T DK1270196T3 (en) 2001-06-29 2001-06-29 Process for making an embossed sheet of cellulose wadding, the product obtained and stamping roll
    EP01401741A EP1270196B1 (en) 2001-06-29 2001-06-29 Method of making embossed tissue paper and embossing cylinder
    CA2391570A CA2391570C (en) 2001-06-29 2002-06-25 Method for fabricating an embossed sheet of cellulose tissue, a product so made and an embossing cylinder
    US10/179,947 US6942755B2 (en) 2001-06-29 2002-06-26 Method for fabricating an embossed sheet of cellulose tissue, a product so made and an embossing cylinder

    Applications Claiming Priority (1)

    Application Number Priority Date Filing Date Title
    EP01401741A EP1270196B1 (en) 2001-06-29 2001-06-29 Method of making embossed tissue paper and embossing cylinder

    Publications (2)

    Publication Number Publication Date
    EP1270196A1 true EP1270196A1 (en) 2003-01-02
    EP1270196B1 EP1270196B1 (en) 2006-03-29

    Family

    ID=8182787

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP01401741A Expired - Lifetime EP1270196B1 (en) 2001-06-29 2001-06-29 Method of making embossed tissue paper and embossing cylinder

    Country Status (8)

    Country Link
    US (1) US6942755B2 (en)
    EP (1) EP1270196B1 (en)
    AT (1) ATE321650T1 (en)
    CA (1) CA2391570C (en)
    DE (1) DE60118322T2 (en)
    DK (1) DK1270196T3 (en)
    ES (1) ES2260179T3 (en)
    PT (1) PT1270196E (en)

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    WO2006133389A2 (en) * 2005-06-08 2006-12-14 The Procter & Gamble Company Improved process for producing deep-nested embossed paper products
    US7413630B2 (en) * 2001-12-12 2008-08-19 Georgia-Pacific France Multi-layer sheet of absorbent paper
    US7494564B2 (en) * 2003-03-07 2009-02-24 Georgia-Pacific France Absorbent paper product having improved embossing
    US7540939B2 (en) * 2002-01-25 2009-06-02 Georgia-Pacific France Absorbent embossed paper sheet

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    DK1270196T3 (en) * 2001-06-29 2006-07-31 Georgia Pacific France Process for making an embossed sheet of cellulose wadding, the product obtained and stamping roll
    ES2282221T3 (en) * 2001-12-27 2007-10-16 Georgia-Pacific France GOFRADA PAPER SHEET.
    US20050247397A1 (en) * 2003-09-29 2005-11-10 The Procter & Gamble Company Process for producing embossed products
    US7435313B2 (en) * 2004-05-21 2008-10-14 The Procter & Gamble Company Process for producing deep-nested embossed paper products
    US7799169B2 (en) * 2004-09-01 2010-09-21 Georgia-Pacific Consumer Products Lp Multi-ply paper product with moisture strike through resistance and method of making the same
    US20060112689A1 (en) * 2004-11-30 2006-06-01 Savage Patrick W Jr Divided housing turbocharger with a variable nozzle area
    US7597777B2 (en) * 2005-09-09 2009-10-06 The Procter & Gamble Company Process for high engagement embossing on substrate having non-uniform stretch characteristics
    ITFI20060072A1 (en) * 2006-03-15 2007-09-16 Perini Fabio Spa EMBOSSING ROLLER AND ITS PROCEDURE FOR ITS PRODUCTION
    US7971526B2 (en) * 2006-04-17 2011-07-05 Kimberly-Clark Worldwide, Inc. Embossing or bonding device containing facetted impression elements
    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
    JP5515650B2 (en) * 2008-12-09 2014-06-11 セイコーエプソン株式会社 Image recording method and image recording system
    JP5426690B2 (en) 2009-12-28 2014-02-26 株式会社フジクラ Mold and manufacturing method thereof
    ES2547422T3 (en) * 2012-07-10 2015-10-06 Sca Tissue France A non-woven textile material with a fabric-like texture comprising papermaking fibers, a calendering roller and method of manufacturing it
    EP2692948B2 (en) * 2012-08-03 2023-04-19 Sca Tissue France Multi-ply tissue paper product and method for manufacturing the same
    US10052237B2 (en) 2013-06-19 2018-08-21 The Procter & Gamble Company Bonding apparatus and method
    JP2016526963A (en) 2013-06-19 2016-09-08 ザ プロクター アンド ギャンブル カンパニー Joining apparatus and method
    US10654244B2 (en) 2016-10-14 2020-05-19 Gpcp Ip Holdings Llc Laminated multi-ply tissue products with improved softness and ply bonding
    CA180015S (en) * 2018-03-08 2019-02-05 Cascades Canada Ulc Embossed tissue sheet

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    US5620776A (en) * 1992-12-24 1997-04-15 James River Corporation Of Virginia Embossed tissue product with a plurality of emboss elements
    US5874156A (en) * 1992-12-24 1999-02-23 Fort James Corporation High softness embossed tissue
    US6173496B1 (en) * 1996-10-16 2001-01-16 Fort James Corporation Embossing system including sleeved rolls
    US6176819B1 (en) * 1997-12-19 2001-01-23 Boegli-Gravures S.A. Device and method for embossing a foil
    DE19960658A1 (en) * 1999-12-15 2001-06-28 A & E Ungricht Gmbh & Co Kg Embossing patterns on tissue webs uses a pair of rollers with an engraved roller bearing against a counter roller, using a secondary pattern with local pressure points to reduce wear on the counter roller

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    US7413630B2 (en) * 2001-12-12 2008-08-19 Georgia-Pacific France Multi-layer sheet of absorbent paper
    US7540939B2 (en) * 2002-01-25 2009-06-02 Georgia-Pacific France Absorbent embossed paper sheet
    US7494564B2 (en) * 2003-03-07 2009-02-24 Georgia-Pacific France Absorbent paper product having improved embossing
    WO2006133389A2 (en) * 2005-06-08 2006-12-14 The Procter & Gamble Company Improved process for producing deep-nested embossed paper products
    WO2006133389A3 (en) * 2005-06-08 2007-02-01 Procter & Gamble Improved process for producing deep-nested embossed paper products

    Also Published As

    Publication number Publication date
    DE60118322D1 (en) 2006-05-18
    DK1270196T3 (en) 2006-07-31
    EP1270196B1 (en) 2006-03-29
    ATE321650T1 (en) 2006-04-15
    PT1270196E (en) 2006-07-31
    US6942755B2 (en) 2005-09-13
    CA2391570C (en) 2011-02-15
    ES2260179T3 (en) 2006-11-01
    US20030008109A1 (en) 2003-01-09
    CA2391570A1 (en) 2002-12-29
    DE60118322T2 (en) 2006-11-02

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