EP0570579B1 - Complex sheets of absorbent paper - Google Patents

Complex sheets of absorbent paper Download PDF

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Publication number
EP0570579B1
EP0570579B1 EP93902304A EP93902304A EP0570579B1 EP 0570579 B1 EP0570579 B1 EP 0570579B1 EP 93902304 A EP93902304 A EP 93902304A EP 93902304 A EP93902304 A EP 93902304A EP 0570579 B1 EP0570579 B1 EP 0570579B1
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EP
European Patent Office
Prior art keywords
pattern
bosses
sheet
sheets
embossings
Prior art date
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Expired - Lifetime
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EP93902304A
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German (de)
French (fr)
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EP0570579A1 (en
Inventor
Rémy Ruppel
Pierre Laurent
Joel Hungler
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Essity Operations France SAS
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Individual
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/07—Embossing, i.e. producing impressions formed by locally deep-drawing, e.g. using rolls provided with complementary profiles
    • 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
    • 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
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24752—Laterally noncoextensive components
    • Y10T428/24769—Cellulosic
    • 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.]
    • Y10T428/24777—Edge feature
    • Y10T428/24785—Edge feature including layer embodying mechanically interengaged strands, strand portions or strand-like strips [e.g., weave, knit, etc.]
    • 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.]
    • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
    • 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.]
    • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
    • Y10T428/24992—Density or compression of components

Definitions

  • the present invention relates to new sheets paper towel complexes.
  • the invention relates more particularly to papers usable in the household and domestic field, in particular embossed papers based on crepe paper such as cotton wool cellulose.
  • embossed papers based on crepe paper such as cotton wool cellulose.
  • crepe paper such as cotton wool cellulose.
  • a first type consists in making two embossings identical on two separate folds of paper, so as to make protuberances on the leaves, and to form a laminate from of these two sheets, the protuberances of the two sheets being directed towards the internal part of the laminate and glued together by their peaks.
  • This system does what we agree to call a "point-to-point" assembly.
  • Such a process, as well as the laminates obtained, is described in patent US-A-3,414,459. It basically allows you to make papers for two layers with the structure shown in Figure 6 of the patent US-A-3,414,459.
  • Another variant described in this patent consists, as shown in Figure 7, to insert, before bonding spikes, an unembossed sheet between the two embossed sheets.
  • the object of the present invention is to improve the feel, flexibility and visual appearance of the complex sheets of absorbent paper known in the prior art and in particular of the products assembled according to the tip-tip technique or the "nested" technique mentioned. above, each fold of which has an embossing pattern with bosses of height between approximately 0.5 mm and 2.5 mm, density between 3 and 20 bosses per cm 2 , and representing 5 to 60% of the total from the surface.
  • this result is achieved with a complex sheet of paper of the type described above, characterized in that said embossed sheet comprises a second embossing pattern with bosses 0.1 to 0.30 mm high surrounding the bosses of the first pattern, and whose density is between 20 and 300 bosses per cm 2 .
  • This embossing which can be described as micro-embossing, occupying the spaces between the bosses of greater depth, gives the sheet a more textile, pleasing to the eye. In addition, it improves the feel and flexibility of it.
  • the density of the second pattern is less than 300 bosses per cm 2 (because beyond 300, it is no longer possible to discern the bosses; the sheet appears smooth), it is preferably between 40 and 100.
  • the ratio between the density of the second pattern and that of the first pattern is greater than 2 so that at least one micro-boss is between any two bosses of the first pattern.
  • the complex sheet of the present invention is distinguished from that proposed by this patent, by the first pattern which is of density greater than 3 bosses per cm 2 with a covered area of 5 to 60%, whereas in the patent this one consists of relatively large bosses, each reproducing the design of a flower according to the example presented, and widely spaced from each other.
  • the bosses of the second pattern have a maximum depth of 0.30 mm (the depth chosen depends essentially on the grammage: 0.1 mm for a low grammage and 0.30 mm for a grammage heavier)
  • the bosses of the second pattern according to US-A-4 320 162 have a depth of 0.38 to 1.27 mm, determined according to the weight of the embossed sheet, and their function is to come into contact through their top of the is precisely the large spacing of the bosses of the first pattern.
  • FIG. 1 there is shown, in enlarged section, a complex sheet according to the invention.
  • This complex sheet consists of two sheets (1) and (2) of crepe absorbent paper, the characteristics of which are commonly a function of the desired application: toilet paper, paper towel, table napkin, tablecloth, etc.
  • This paper is of grammage between 12 and 30 g / m 2 , also according to the envisaged application, and its creping rate is preferably between 10 and 30%.
  • the thickness of such a creped sheet, before any embossing, is between 0.07 and 0.2 mm.
  • each sheet (1) and (2) comprises a first relatively deep embossing pattern (3).
  • the two sheets are linked together and glued by the tops of bosses of this first motif. This assembly is known as point-to-point.
  • the bosses have a height H of between 0.5 mm and 2.5 mm (the height is measured between the plane of the plane face and the plane defined by the top of the bosses). They are distributed in a pattern, generally regular, any with a density of 3 to 19 bosses per cm 2 and occupy 5 to 60% of the surface.
  • the boss section can be any: circular, oval or other.
  • At least one sheet, both in the example shown, of the complex sheet comprises a second embossing pattern (4) consisting of thinner bosses and of small height h, between 0.1 and 0 , 30 mm, distributed between the bosses of the first pattern.
  • the choice of height depends on the grammage and the creping rate of the paper; for example, for a paper of 30g / m 2 with a coarse creping, the height of the bosses will be chosen at 0.25 or 0.30 mm. For a light weight paper, this height may be between 0.1 and 0.2 mm.
  • the density of the bosses of this pattern is greater than that of the first pattern, preferably it must be in a ratio at least greater than 2.
  • FIG 2 there is shown an assembly of sheets (1) and (2) according to the so-called "nested" mode where the bosses (3) of the sheet (1) corresponding to the first pattern are nested between the bosses (3) of the second sheet (2).
  • the connection between the two folds is provided by a layer of glue deposited on the top of the bosses of the first motif of one of the two leaves.
  • a first pair of cylinders (101, 103) having an engraved metal cylinder (101) on the surface of which are embossed according to the pattern wish.
  • the metal cylinder is rotated around a horizontal axis and is associated with a rubber cylinder (103) which is parallel to it. and with which he spares an interval clamping (101, 103). Passing through this interval, a leaf of absorbent paper in cellulose wadding undergoes deformations permanent mechanical by the pressure exerted by the reliefs of the metal cylinder.
  • the reliefs of the cylinder are divided into two patterns: a first pattern with protrusions with a height of at least 2 mm and a second pattern with protrusions of height equal to 0.6 mm for example.
  • the installation comprises a second pair of cylinders of embossing with a metal cylinder (105) of the same diameter and rotating in the same horizontal plane as the cylinder (101), it cooperates with a rubber cylinder (107) for embossing.
  • the cylinders (101) and (105) provide a gap between them tightening (101, 105) and are driven at rotational speeds opposite, synchronous, so as to roll over each other without slip.
  • the installation also includes a gluing system (110) with applicator cylinder (111) (rubber or other material equivalent) bearing on the cylinder (101) upstream of the tightening interval (101, 105).
  • a transfer cylinder (113) transfers the adhesive from a plunger cylinder (115) to the applicator cylinder (111).
  • the plunger cylinder (115) takes the glue in a tray.
  • the sheets (1, 2) of absorbent paper to be combined are supplied from coils (11, 12).
  • the sheet (1) is guided around the rubber cylinder (103) and passes in the meantime clamping (101, 103) from which it emerges embossed, by marrying the relief surface of the metal cylinder (101).
  • the cylinder applicator (111) then deposits adhesive, in metered quantity, on the surface of the protuberances of the sheet, forming flats.
  • the second sheet (2) also undergoes treatment mechanical embossing, by passing through the clamping interval (105, 107), then is associated with the sheet (1) in the interval of tightening (101, 105).
  • the resulting complex sheet is put in coil pending further processing.

Landscapes

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

Abstract

The compound sheet made of absorbent paper consists of at least two crepe paper sheets with a specific weight between 12 and 30 g/m2. At least one sheet includes a first embossing pattern with bosses pointing inward the compound sheet and having a height of between 0.5 and 2.5 mm, a density of between 3 and 20 bosses per cm2 and covering 5 to 60% of the surface. The compound sheet is characterized in that the embossed sheet comprises a second embossing pattern with bosses 0.1 to 0.30 mm high.

Description

La présente invention a pour objet de nouvelles feuilles complexes de papier absorbant.The present invention relates to new sheets paper towel complexes.

L'invention concerne plus particulièrement les papiers utilisables dans le domaine ménager et domestique, en particulier les papiers gaufrés à base de papier crêpé de type ouate de cellulose. Dans ce domaine, on recherche tout particulièrement des papiers ayant de bonnes qualités d'absorption associées à une grande douceur et de bonnes propriétés de résistance mécanique.The invention relates more particularly to papers usable in the household and domestic field, in particular embossed papers based on crepe paper such as cotton wool cellulose. In this area, we are particularly looking for papers having good absorption qualities associated with a great softness and good mechanical resistance properties.

On s'est orienté dans ce domaine, depuis de nombreuses années, vers des papiers présentant plusieurs couches, en général deux ou trois, préalablement gaufrées, puis collées légèrement entre elles, de la colle étant déposée sur le sommet des protubérances réalisées au cours de l'opération de gaufrage.We have been oriented in this area for many years, towards papers having several layers, in general two or three, previously embossed, then lightly glued together, glue being deposited on the top of the protuberances produced during the embossing operation.

Deux systèmes différents de gaufrage, d'assemblage et collage sont actuellement utilisés conduisant à deux types de structure différents. Un premier type consiste à réaliser deux gaufrages identiques sur deux plis séparés de papier, de façon à réaliser des protubérances sur les feuilles, et à former un stratifié à partir de ces deux feuilles, les protubérances des deux feuilles étant dirigées vers la partie interne du stratifié et collées entre elles par leurs sommets. Ce système réalise ce que l'on conviendra d'appeler un assemblage "pointe-pointe". Un tel procédé, ainsi que les stratifiés obtenus, est décrit dans le brevet US-A-3 414 459. Il permet essentiellement de confectionner des papiers à deux couches avec la structure représentée à la figure 6 du brevet US-A-3 414 459. Une autre variante décrite dans ce brevet consiste, comme cela apparaít à la figure 7, à insérer, avant le collage des pointes, une feuille non gaufrée entre les deux feuilles gaufrées.Two different embossing, assembly and bonding systems are currently used leading to two types of structure different. A first type consists in making two embossings identical on two separate folds of paper, so as to make protuberances on the leaves, and to form a laminate from of these two sheets, the protuberances of the two sheets being directed towards the internal part of the laminate and glued together by their peaks. This system does what we agree to call a "point-to-point" assembly. Such a process, as well as the laminates obtained, is described in patent US-A-3,414,459. It basically allows you to make papers for two layers with the structure shown in Figure 6 of the patent US-A-3,414,459. Another variant described in this patent consists, as shown in Figure 7, to insert, before bonding spikes, an unembossed sheet between the two embossed sheets.

Un autre procédé décrit en particulier dans le brevet US-A-3 867 225 consiste à réaliser un stratifié entre deux feuilles gaufrées placées également de façon que les protubérances soient dirigées vers l'intérieur du stratifié : on encolle les sommets des protubérances de l'une des deux feuilles et on réalise le collage dans une position telle que les protubérances de l'une des feuilles viennent s'emboíter entre deux protubérances de l'autre feuille. On conviendra d'appeler structure "emboítée" ou "nested" la structure obtenue.Another process described in particular in the patent US-A-3,867,225 consists of making a laminate between two sheets embossed also placed so that the protrusions are directed towards the inside of the laminate: we glue the tops of the protuberances of one of the two sheets and bonding is carried out in a position such that the protrusions of one of the leaves come to fit between two protrusions of the other sheet. We agree to call structure "nested" or "nested" the structure obtained.

La présente invention a pour objet d'améliorer le toucher, la souplesse et l'aspect visuel des feuilles complexes de papier absorbant connues dans l'art antérieur et en particulier des produits assemblés selon la technique pointe-pointe ou la technique "nested" mentionnées ci-dessus dont chaque pli présente un motif de gaufrage avec des bossages de hauteur comprise entre environ 0,5 mm et 2,5 mm, de densité comprise entre 3 et 20 bossages par cm2, et représentant 5 à 60 % de la totalité de la surface.The object of the present invention is to improve the feel, flexibility and visual appearance of the complex sheets of absorbent paper known in the prior art and in particular of the products assembled according to the tip-tip technique or the "nested" technique mentioned. above, each fold of which has an embossing pattern with bosses of height between approximately 0.5 mm and 2.5 mm, density between 3 and 20 bosses per cm 2 , and representing 5 to 60% of the total from the surface.

Conformément à l'invention on parvient à ce résultat avec une feuille complexe de papier de type décrit ci-dessus caractérisée en ce que ladite feuille gaufrée comprend un deuxième motif de gaufrage avec des bossages de 0,1 à 0,30 mm de haut entourant les bossages du premier motif, et dont la densité est comprise entre 20 et 300 bossages par cm2.In accordance with the invention, this result is achieved with a complex sheet of paper of the type described above, characterized in that said embossed sheet comprises a second embossing pattern with bosses 0.1 to 0.30 mm high surrounding the bosses of the first pattern, and whose density is between 20 and 300 bosses per cm 2 .

Ce gaufrage, que l'on peut qualifier de micro-gaufrage, en occupant les espaces entre les bossages de profondeur plus importante, confère à la feuille un aspect plus textile, agréable à la vue. En outre, il améliore le toucher et la souplesse de celle-ci.This embossing, which can be described as micro-embossing, occupying the spaces between the bosses of greater depth, gives the sheet a more textile, pleasing to the eye. In addition, it improves the feel and flexibility of it.

La densité du deuxième motif est inférieure à 300 bossages par cm2 (car au delà de 300, il n'est plus possible de discerner les bossages ; la feuille paraít lisse), elle est de préférence entre 40 et 100.The density of the second pattern is less than 300 bosses per cm 2 (because beyond 300, it is no longer possible to discern the bosses; the sheet appears smooth), it is preferably between 40 and 100.

Avantageusement, le rapport entre la densité du deuxième motif et celle du premier motif est supérieur à 2 de telle sorte qu'au moins un micro-bossage soit compris entre deux bossages quelconques du premier motif.Advantageously, the ratio between the density of the second pattern and that of the first pattern is greater than 2 so that at least one micro-boss is between any two bosses of the first pattern.

La Demanderesse connaít le brevet US-A- 4 320 162 qui a proposé une structure à deux feuilles de papier présentant chacune deux motifs de gaufrage : un premier motif relativement espacé avec des bossages larges et profonds de 1 à 2,3 mm, et un deuxième motif plus serré avec des bossages minces, entourant les premiers, profonds de 0,38 à 1,27 mm seulement. Les deux feuilles sont collées entre elles par le sommet des bossages du premier motif. Il est précisé que l'espacement relativement large des bossages du premier motif permet aux bossages du deuxième motif de venir en contact par leur sommet, du fait de la flexion de la feuille. Ce deuxième motif confère ainsi douceur, absorption et volume à la double feuille, et améliore son aspect.The Applicant is aware of US Pat. No. 4,320,162 which has proposed a structure with two sheets of paper each having two embossing patterns: a first pattern relatively spaced with wide and deep bosses of 1 to 2.3 mm, and a second, tighter pattern with thin bosses, surrounding the first, deep from 0.38 to 1.27 mm only. The two sheets are glued together by the top bosses of the first motif. It should be noted that the relatively wide spacing of bosses of the first pattern allows the bosses of the second pattern to come into contact by their top, due to the bending of the sheet. This second pattern gives softness, absorption and volume to the double sheet, and improves its appearance.

La feuille complexe de la présente invention se distingue, de celle proposée par ce brevet, par le premier motif qui est de densité supérieure à 3 bossages par cm2 avec une surface couverte de 5 à 60 %, alors que dans le brevet celui-ci est constitué de bossages relativement larges, chacun reproduisant le dessin d'une fleur selon l'exemple présenté, et largement espacés les uns des autres. En outre, alors que, selon l'invention, les bossages du deuxième motif ont une profondeur maximale de 0,30 mm (la profondeur choisie dépendant essentiellement du grammage : 0,1 mm pour un faible grammage et 0,30 mm pour un grammage plus lourd) les bossages du deuxième motif selon US-A- 4 320 162 ont une profondeur de 0,38 à 1,27 mm, déterminée selon le poids de la feuille gaufrée, et leur fonction est de venir en contact par leur sommet du fait précisément du large espacement des bossages du premier motif.The complex sheet of the present invention is distinguished from that proposed by this patent, by the first pattern which is of density greater than 3 bosses per cm 2 with a covered area of 5 to 60%, whereas in the patent this one consists of relatively large bosses, each reproducing the design of a flower according to the example presented, and widely spaced from each other. In addition, while, according to the invention, the bosses of the second pattern have a maximum depth of 0.30 mm (the depth chosen depends essentially on the grammage: 0.1 mm for a low grammage and 0.30 mm for a grammage heavier) the bosses of the second pattern according to US-A-4 320 162 have a depth of 0.38 to 1.27 mm, determined according to the weight of the embossed sheet, and their function is to come into contact through their top of the is precisely the large spacing of the bosses of the first pattern.

D'autres caractéristiques et avantages de la feuille complexe conforme à l'invention apparaítront à la lecture de la description qui suit de deux modes de réalisation accompagnée des dessins annexés sur lesquels

  • la figure 1 représente une feuille complexe conforme à l'invention assemblée selon le mode pointe-pointe.
  • la figure 2 représente une feuille complexe conforme à l'invention assemblée selon le mode "nested".
  • la figure 3 représente une installation permettant la réalisation de feuilles selon l'invention.
Other characteristics and advantages of the complex sheet according to the invention will appear on reading the following description of two embodiments accompanied by the accompanying drawings in which
  • Figure 1 shows a complex sheet according to the invention assembled according to the tip-tip mode.
  • FIG. 2 represents a complex sheet in accordance with the invention assembled according to the "nested" mode.
  • FIG. 3 represents an installation allowing the production of sheets according to the invention.

Sur la figure 1 on a représenté, en coupe agrandie, une feuille complexe selon l'invention. Cette feuille complexe est constituée de deux feuilles (1) et (2) de papier absorbant crêpé dont les caractéristiques sont communément fonction de l'application souhaitée : papier toilette, essuie-tout, serviette de table, nappe, etc... Ce papier est de grammage compris entre 12 et 30g/m2, également selon l'application envisagée, et son taux de crêpage est de préférence compris entre 10 et 30 %. L'épaisseur d'une telle feuille crêpée, avant tout gaufrage, est comprise entre 0,07 et 0,2 mm. In Figure 1 there is shown, in enlarged section, a complex sheet according to the invention. This complex sheet consists of two sheets (1) and (2) of crepe absorbent paper, the characteristics of which are commonly a function of the desired application: toilet paper, paper towel, table napkin, tablecloth, etc. This paper is of grammage between 12 and 30 g / m 2 , also according to the envisaged application, and its creping rate is preferably between 10 and 30%. The thickness of such a creped sheet, before any embossing, is between 0.07 and 0.2 mm.

Comme on peut la voir sur la figure chaque feuille (1) et (2) comprend un premier motif de gaufrage (3) relativement profond. Les deux feuilles sont liées entre elles et collées par les sommets des bossages de ce premier motif. Cet assemblage est connu sous le nom pointes-pointes.As can be seen in the figure each sheet (1) and (2) comprises a first relatively deep embossing pattern (3). The two sheets are linked together and glued by the tops of bosses of this first motif. This assembly is known as point-to-point.

Dans ce type de produit, les bossages ont une hauteur H comprise entre 0,5 mm et 2,5 mm (la hauteur est mesurée entre le plan de la face plane et le plan défini par le sommet des bossages). Ils sont répartis selon un motif, généralement régulier, quelconque avec une densité de 3 à 19 bossages au cm2 et occupent 5 à 60 % de la surface. La section des bossages peut être quelconque : circulaire, ovale ou autre.In this type of product, the bosses have a height H of between 0.5 mm and 2.5 mm (the height is measured between the plane of the plane face and the plane defined by the top of the bosses). They are distributed in a pattern, generally regular, any with a density of 3 to 19 bosses per cm 2 and occupy 5 to 60% of the surface. The boss section can be any: circular, oval or other.

Conformément à l'invention, au moins une feuille, les deux dans l'exemple représenté, de la feuille complexe comprend un deuxième motif de gaufrage (4) constitué de bossages plus fins et de faible hauteur h, comprise entre 0,1 et 0,30 mm, repartis entre les bossages du premier motif. Le choix de la hauteur dépend du grammage et du taux de crêpage du papier ; par exemple, pour un papier de 30g/m2 avec un crêpage grossier, la hauteur des bossages sera choisie à 0,25 ou 0,30 mm. Pour un papier de grammage léger, cette hauteur pourra être comprise entre 0,1 et 0,2 mm. La densité des bossages de ce motif est supérieure à celle du premier motif, de préférence elle devra être dans un rapport au moins supérieur à 2.According to the invention, at least one sheet, both in the example shown, of the complex sheet comprises a second embossing pattern (4) consisting of thinner bosses and of small height h, between 0.1 and 0 , 30 mm, distributed between the bosses of the first pattern. The choice of height depends on the grammage and the creping rate of the paper; for example, for a paper of 30g / m 2 with a coarse creping, the height of the bosses will be chosen at 0.25 or 0.30 mm. For a light weight paper, this height may be between 0.1 and 0.2 mm. The density of the bosses of this pattern is greater than that of the first pattern, preferably it must be in a ratio at least greater than 2.

Il est possible de prévoir une troisième feuille intercalée entre les deux feuilles gaufrées sans sortir pour autant du cadre de l'invention.It is possible to provide a third interleaved sheet between the two embossed sheets without leaving the frame of the invention.

Sur la figure 2, on a représenté un assemblage de feuilles (1) et (2) selon le mode dit "nested" où les bossages (3) de la feuille (1) correspondant au premier motif sont emboítés entre les bossages (3) de la deuxième feuille (2). La liaison entre les deux plis est assurée par une couche de colle déposée sur le sommet des bossages du premier motif de l'une des deux feuilles.In Figure 2, there is shown an assembly of sheets (1) and (2) according to the so-called "nested" mode where the bosses (3) of the sheet (1) corresponding to the first pattern are nested between the bosses (3) of the second sheet (2). The connection between the two folds is provided by a layer of glue deposited on the top of the bosses of the first motif of one of the two leaves.

On décrit ci-après une installation connue en soi, permettant de réaliser la feuille de l'invention.An installation known per se is described below, allowing to make the sheet of the invention.

Sur la figure 3, on a représenté une première paire de cylindres (101, 103) comportant un cylindre métallique gravé (101) à la surface duquel sont implantés des reliefs selon le motif souhaité. Le cylindre métallique est entraíné en rotation autour d'un axe horizontal et est associé à un cylindre en caoutchouc (103) qui lui est parallèle. et avec lequel il ménage un intervalle de serrage (101, 103). En passant dans cet intervalle, une feuille de papier absorbant en ouate de cellulose subit des déformations mécaniques permanentes par la pression exercée par les reliefs du cylindre métallique.In Figure 3, a first pair of cylinders (101, 103) having an engraved metal cylinder (101) on the surface of which are embossed according to the pattern wish. The metal cylinder is rotated around a horizontal axis and is associated with a rubber cylinder (103) which is parallel to it. and with which he spares an interval clamping (101, 103). Passing through this interval, a leaf of absorbent paper in cellulose wadding undergoes deformations permanent mechanical by the pressure exerted by the reliefs of the metal cylinder.

Pour la réalisation du gaufrage souhaité, les reliefs du cylindre sont répartis selon deux motifs : un premier motif avec des protubérances de hauteur au moins égale à 2 mm et un deuxième motif avec des protubérances de hauteur égale à 0,6 mm par exemple.For the desired embossing, the reliefs of the cylinder are divided into two patterns: a first pattern with protrusions with a height of at least 2 mm and a second pattern with protrusions of height equal to 0.6 mm for example.

L'installation comporte une deuxième paire de cylindres de gaufrage avec un cylindre métallique (105) de même diamètre et tournant dans le même plan horizontal que le cylindre (101), il coopére avec un cylindre en caoutchouc (107) pour le gaufrage.The installation comprises a second pair of cylinders of embossing with a metal cylinder (105) of the same diameter and rotating in the same horizontal plane as the cylinder (101), it cooperates with a rubber cylinder (107) for embossing.

Les cylindres (101) et (105) ménagent entre eux un intervalle de serrage (101, 105) et sont entraínés à des vitesses de rotation opposées, synchrones, de manière à rouler l'un sur l'autre sans glissement.The cylinders (101) and (105) provide a gap between them tightening (101, 105) and are driven at rotational speeds opposite, synchronous, so as to roll over each other without slip.

L'installation comprend également un système d'encollage (110) avec cylindre applicateur (111) (en caoutchouc ou autre matériau équivalent) venant en appui sur le cylindre (101) en amont de l'intervalle de serrage (101, 105). Un cylindre de transfert (113), transfère l'adhésif depuis un cylindre plongeur (115) sur le cylindre applicateur (111). Le cylindre plongeur (115) prélève la colle dans un bac.The installation also includes a gluing system (110) with applicator cylinder (111) (rubber or other material equivalent) bearing on the cylinder (101) upstream of the tightening interval (101, 105). A transfer cylinder (113), transfers the adhesive from a plunger cylinder (115) to the applicator cylinder (111). The plunger cylinder (115) takes the glue in a tray.

Les feuilles (1, 2) de papier absorbant à associer sont alimentées depuis des bobines (11, 12). La feuille (1) est guidée autour du cylindre en caoutchouc (103) et passe dans l'intervalle de serrage (101, 103) dont elle ressort gaufrée, en épousant la surface en relief du cylindre métallique (101). Le cylindre applicateur (111) dépose ensuite de la colle, en quantité dosée, sur la surface des protubérances de la feuille, formant méplats.The sheets (1, 2) of absorbent paper to be combined are supplied from coils (11, 12). The sheet (1) is guided around the rubber cylinder (103) and passes in the meantime clamping (101, 103) from which it emerges embossed, by marrying the relief surface of the metal cylinder (101). The cylinder applicator (111) then deposits adhesive, in metered quantity, on the surface of the protuberances of the sheet, forming flats.

La deuxième feuille (2) subit également un traitement mécanique de gaufrage, par passage dans l'intervalle de serrage (105, 107), puis est associée à la feuille (1) dans l'intervalle de serrage (101, 105). La feuille complexe qui en résulte est mise en bobine en attendant d'être transformée ultérieurement. The second sheet (2) also undergoes treatment mechanical embossing, by passing through the clamping interval (105, 107), then is associated with the sheet (1) in the interval of tightening (101, 105). The resulting complex sheet is put in coil pending further processing.

Il est possible de réaliser les feuilles de l'invention en deux étapes. C'est à dire gaufrer préalablement l'une et/ou les deux feuilles avec le second motif puis gaufrer à nouveau selon le premier motif.It is possible to produce the sheets of the invention by two step. In other words, emboss one and / or the two sheets with the second pattern then emboss again according to the first motif.

Le mode de réalisation de la figure 3 s'applique préférentiellement à une association de type pointe/pointe.The embodiment of Figure 3 applies preferentially to a tip / tip type association.

Pour l'association "nested", on utilisera préférentiellement des installations connues de l'art antérieur.For the "nested" association, we preferentially use installations known from the prior art.

Claims (6)

  1. Complex sheet of absorbent paper composed of at least two sheets (1, 2) of crêpe paper with a grammage between 12 and 30 g/m2, at least one having a first embossed pattern (3) with embossings directed towards the interior of the complex, having a height of between 0.5 and 2.5 mm, a density of between 3 and 20 embossings per cm2, and representing 5 to 60 % of the surface area, characterized in that the said embossed sheet comprises a second embossed pattern (4) with embossings 0.1 to 0.30 mm in height, its density being between 20 and 300 embossings to the cm2.
  2. Complex sheet according to claim 1, characterized in that the height of the embossings of the second pattern (4) is between 0.1 and 0.2 mm.
  3. Complex sheet according to claim 2, characterized in that the density of the second pattern (4) is between 40 and 100 embossings to the cm2.
  4. Complex sheet according to claim 1 or 2, characterized in that the ratio of the density of the second pattern (4) to that of the first pattern (3) is greater than 2.
  5. Complex sheet according to one of the preceding claims, characterized in that the two sheets are embossed and are bonded by the embossings of the first pattern (3) by the so-called "point-to-point" method.
  6. Complex sheet according to one of claims 1 to 3, characterized in that the two sheets are embossed and are bonded by the embossings of the first pattern on one and the embossings of the second pattern on the other by the so-called "nested" method.
EP93902304A 1991-12-09 1992-12-07 Complex sheets of absorbent paper Expired - Lifetime EP0570579B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9115209 1991-12-09
FR9115209A FR2684599B1 (en) 1991-12-09 1991-12-09 COMPLEX SHEET OF ABSORBENT PAPER.
PCT/FR1992/001156 WO1993012293A1 (en) 1991-12-09 1992-12-07 Complex sheets of absorbent paper

Publications (2)

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EP0570579A1 EP0570579A1 (en) 1993-11-24
EP0570579B1 true EP0570579B1 (en) 1998-03-04

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EP93902304A Expired - Lifetime EP0570579B1 (en) 1991-12-09 1992-12-07 Complex sheets of absorbent paper

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US (1) US6287676B1 (en)
EP (1) EP0570579B1 (en)
AT (1) ATE163701T1 (en)
DE (1) DE69224628T2 (en)
DK (1) DK0570579T3 (en)
ES (1) ES2114033T3 (en)
FI (1) FI98946C (en)
FR (1) FR2684599B1 (en)
NO (1) NO301895B1 (en)
WO (1) WO1993012293A1 (en)

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FR2808816B1 (en) * 2000-05-12 2003-05-30 Fort James France ABSORBENT PAPER PRODUCT WITH DISSYMMETRIC STRUCTURE
US7407560B2 (en) * 2001-02-16 2008-08-05 The Procter & Gamble Company Lotioned and embossed tissue paper
US20050230069A1 (en) * 2001-02-16 2005-10-20 Klaus Hilbig Method of making a thick and smooth embossed tissue
US7083845B2 (en) * 2001-02-23 2006-08-01 Georgia-Pacific France Sheet of absorbent creped paper, cylinder for embossing such a sheet and an embossing process
EP1321576A1 (en) * 2001-12-20 2003-06-25 SCA Hygiene Products AB A laminated tissue paper and a method of forming it
ES2282221T3 (en) * 2001-12-27 2007-10-16 Georgia-Pacific France GOFRADA PAPER SHEET.
EP1391174B1 (en) * 2002-08-22 2008-07-23 Georgia-Pacific France Roll of cellulose wadding sheets and process for producing the same
EP1455014B1 (en) * 2003-03-07 2011-08-17 Georgia-Pacific France Embossed absorbent paper sheet
ITFI20040053A1 (en) * 2004-03-04 2004-06-04 Perini Fabio Spa MULTI-SPEED PRODUCT IN PAPER OR SIMILAR, METHOD FOR ITS PRODUCTION AND RELATED PLANT
EP1712163A1 (en) * 2005-04-12 2006-10-18 Comercial Feragus Ltda. A disposable place mat manufactured out of embossed paper which has publicity printed on its upper face and which serves as a cleaning device once it has been used
ES2371663T3 (en) * 2006-08-17 2012-01-05 Sca Hygiene Products Gmbh METHOD FOR PRODUCING A DECORATIVE MULTI-PAPER PAPER PRODUCT AND SUCH MULTI-PAPER PAPER PRODUCT.
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ITBO20110121A1 (en) * 2011-03-14 2012-09-15 Andrea Bernacchi MULTILAYER EMBOSSED PAPER AND METHOD FOR THE IMPLEMENTATION OF SUCH EMBOSSED PAPER
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US9915034B2 (en) 2014-05-16 2018-03-13 Gpcp Ip Holdings Llc High bulk tissue product
USD840163S1 (en) 2014-05-16 2019-02-12 Gpcp Ip Holdings Llc Paper product
US20170328011A1 (en) * 2016-05-13 2017-11-16 First Quality Tissue, Llc Multi-ply tissue containing laminated and non-laminated embossed areas
US20230347639A1 (en) 2022-04-27 2023-11-02 Sofidel S.P.A. Embossing-laminating device with double height engraved rollers

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Also Published As

Publication number Publication date
FI933496A (en) 1993-08-06
NO932807D0 (en) 1993-08-06
FI933496A0 (en) 1993-08-06
EP0570579A1 (en) 1993-11-24
FI98946B (en) 1997-05-30
FI98946C (en) 1997-09-10
NO301895B1 (en) 1997-12-22
NO932807L (en) 1993-08-06
WO1993012293A1 (en) 1993-06-24
ES2114033T3 (en) 1998-05-16
FR2684599B1 (en) 1994-01-28
DE69224628D1 (en) 1998-04-09
US6287676B1 (en) 2001-09-11
DE69224628T2 (en) 1998-07-16
ATE163701T1 (en) 1998-03-15
FR2684599A1 (en) 1993-06-11
DK0570579T3 (en) 1998-03-30

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