EP0670773A1 - Laminated product made of cellulose wad. - Google Patents

Laminated product made of cellulose wad.

Info

Publication number
EP0670773A1
EP0670773A1 EP94900863A EP94900863A EP0670773A1 EP 0670773 A1 EP0670773 A1 EP 0670773A1 EP 94900863 A EP94900863 A EP 94900863A EP 94900863 A EP94900863 A EP 94900863A EP 0670773 A1 EP0670773 A1 EP 0670773A1
Authority
EP
European Patent Office
Prior art keywords
product
product according
folds
bonding
plies
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
EP94900863A
Other languages
German (de)
French (fr)
Other versions
EP0670773B1 (en
Inventor
Pierre Laurent
Remy Ruppel
Pierre Probst
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Essity Operations France SAS
Original Assignee
Kaysersberg SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
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Application filed by Kaysersberg SA filed Critical Kaysersberg SA
Priority to EP97100688A priority Critical patent/EP0776758B1/en
Publication of EP0670773A1 publication Critical patent/EP0670773A1/en
Application granted granted Critical
Publication of EP0670773B1 publication Critical patent/EP0670773B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41B—SHIRTS; UNDERWEAR; BABY LINEN; HANDKERCHIEFS
    • A41B15/00—Handkerchiefs
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D27/00—Details of garments or of their making
    • A41D27/24—Hems; Seams
    • A41D27/245—Hems; Seams made by welding or gluing
    • 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
    • B31D—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C
    • B31D1/00—Multiple-step processes for making flat articles ; Making flat articles
    • B31D1/04—Multiple-step processes for making flat articles ; Making flat articles the articles being napkins, handkerchiefs, towels, doilies, or the like
    • 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
    • B31F2201/0758—Characteristics of the embossed product
    • B31F2201/0761—Multi-layered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0784—Auxiliary operations
    • B31F2201/0787—Applying adhesive
    • 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
    • B31F2201/0792—Printing
    • 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
    • Y10T428/24793—Comprising discontinuous or differential impregnation or bond
    • 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.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]

Definitions

  • the invention relates to the field of sanitary and domestic paper; it relates to the production of laminated products composed of at least two plies or cellulose wadding sheet, in particular for the use of a handkerchief, napkin or other similar applications.
  • the handkerchiefs generally packaged in cases, which are currently found on the market are made up of several sheets of creped absorbent paper, also called cellulose wadding, supe ⁇ osed, and held together by a mechanical connection at the periphery.
  • This connection is obtained by an embossing operation, of the steel / steel or steel / paper type, according to which the sheets are passed between two cylinders meshing one on the other.
  • One of the cylinders has reliefs on the surface and the other has corresponding cavities.
  • the sheets are thus locally deformed into zones which constitute attachment points.
  • a known embossing pattern consists of a multitude of spikes of small diameter and of small height tightened against each other linearly, or in both directions in the running direction and in the transverse direction.
  • Another known pattern consists of fine edge bars arranged in tight parallels. This bonding method is satisfactory when the grammage of the plies is not too high, of the order of 10 to 20 g / m 2 , and when using cellulose wa
  • the invention remedies these drawbacks by providing a product, such as a handkerchief or towel, produced by combining at least two individual plies, or sheets, of superimposed cellulose wadding, cut to the desired format and linked together along '' a peripheral zone characterized in that said folds are bonded by bonding along said zone so as to have a minimum resistance to delamination of 1 g / cm, said peripheral zone representing less than 50% of the total surface of the product
  • Bonding is carried out using any adhesive product generally used in the field of sanitary and household papers to associate folds together.
  • any adhesive product generally used in the field of sanitary and household papers to associate folds together.
  • the bonding is carried out along the four edges of the folds. It is assumed, for simplicity, that it is a rectangular or square format.
  • the invention also includes the case where only two opposite edges are linked.
  • the bonding is carried out along a peripheral zone covering a strip the width of which can vary between a lower limit corresponding to sufficient resistance to delamination and an upper limit where the product would become too stiff.
  • the linked area must represent less than 50% of the product: handkerchief or napkin. According to a particularly preferred embodiment, said zone represents between 30 and 40% of the total surface.
  • the bonding can be carried out by continuous coating of adhesive but also by application thereof on a plurality of surfaces of small extent arranged in a linear pattern or according to points distributed uniformly.
  • a preferred method of binding is then in the latter case, that described in French patent application 89 14202 which makes it possible to ensure a uniform deposit of adhesive in the bonding area without stiffening the sheet.
  • the proposed solution makes it possible to produce laminated products such as choppers, towels or the like, that is to say in the form of individual sheets, having excellent resistance to delamination without being made rigid. in the center, that is to say in the functional area of use, or be likely to irritate the skin by bonding.
  • the tests show that it is very easy to obtain products whose resistance to delamination is much higher than that of a mechanical bond of the prior art.
  • sheets having a different fibrous and / or chemical composition are combined by peripheral bonding.
  • a sheet incorporating an additive is added to increase the resistance in the wet state of the paper to at least one sheet without additive or incorporating an additive to improve the softness. This results in a laminate complex combining properties that cannot be found together on a single-layer product.
  • Figure 1 shows a product, handkerchief for example, with a peripheral connection area of the different folds. A corner has been delaminated to show the folds.
  • Figure 2 shows an installation capable of allowing the production of a product according to the invention.
  • Figure 3 shows a detail of the installation of Figure 2.
  • a choir or a napkin (1) square format consisting of 3 sheets (the , lb, le) of cellulose wadding bonded together, by bonding at the periphery, along an area (3) of determined width.
  • the bonding was effected by points (5) so as not to stiffen the complex; in accordance with the invention, the central area is not glued; it may, if necessary, include an embossing intended to improve the appearance thereof.
  • the peripheral zone (3) covers less than 50% of the total surface of the towel or towel, preferably this zone represents 30% to 40%.
  • a napkin of dimension 40 cm x 40 cm will be bordered by a connecting strip formed by gluing the sheets from the edge line over a width of 4 cm.
  • the linked area thus covers 36% of the total surface of the towel
  • the connection effectively leaves the edge of the folds so as to avoid any yawning of the folds or else the formation of folds at the periphery which adversely affect the appearance of the product.
  • any known installation can be used, for example the one shown in Figure 2.
  • the folds (11) and (12), one being optionally double, of cellulose wadding coming from their respective reel, not shown, are guided to come around the rubber cylinders (13) and (14) then between them and embossing cylinders (15) and (16) in steel provided with appropriate reliefs. These reliefs can be distributed according to the pattern in Figure 1, for example.
  • One of the folds (12) is glued by means of a rubber applicator cylinder (18) shown in FIG. 3.
  • This cylinder comprises, in accordance with one embodiment of the invention, a part (181) in relief, the design of which corresponds to that of the peripheral area for gluing the sheets, so that the adhesive entrained by the applicator cylinder is distributed according to this pattern.
  • one or both sheets can be embossed over their entire surface. Gluing is only carried out on the periphery corresponding to the part (181) of the gluing cylinder.
  • one or both cylinders (15, 16) are provided with reliefs, along a peripheral zone of the desired product format. We can then use a smooth gluing cylinder.
  • the folds (11) and (12) are assembled in the pincer interval formed between the embossing cylinders (15) and (16) which rotate at equal and opposite speeds.
  • the multi-ply sheet from the device is driven to a processing facility where it is cut and folded in accordance with the intended application: handkerchiefs, towels or the like.
  • the plies (11) and (12) can come from the same coil with 2 plies, and have been subjected to a common calendering so as to effect a smoothing of the external face and confer greater sweetness. Then, only the two layers are separated to be embossed separately and individually.
  • a fold, single or double is embossed between a rubber cylinder and a suitably engraved steel cylinder, that is to say with reliefs according to the periphery of the desired product format.
  • the adhesive is deposited on the tops of the reliefs.
  • a second fold is applied to the fold respectively, using a third rubber cylinder of the matchmaker type. This third cylinder ensures both the embossing of the second respectively third fold and its marriage with the first.
  • a steel or paper cylinder can also be used.
  • a test was carried out to test the behavior of the product on delamination compared to a control handkerchief.
  • a handkerchief was made by tying, using an adhesive in solution in water, PVA, 3 folds of format 21.5 x 21.5 cm, at the periphery on a strip of 2 cm wide.
  • bonding makes it possible to produce a product offering a greatly increased resistance to delamination, both in the forward direction (SM) and in the cross direction (ST).
  • a handkerchief was made from 3 plies of cellulose wadding, made up of 60% softwood fibers and 40% hardwood fibers, each having a basis weight of 18 g / m 2 and incorporating an additive, at a rate of 1.5 kg per ton having a deliant effect on the fibers to improve the softness (product marketed by the ENKA NOBEL company under the brand BEROCELL 595).
  • the connection was made by peripheral bonding. Such a product would not be possible with the prior technique of peripheral embossing due to the presence of the additive.
  • control sample III Compared to the control sample III, it can be seen that the invention allows the production of products having a wide range of characteristics depending on the application envisaged.

Abstract

The cellulose fibre tissue product (1), for use as handkerchief or napkin, is made by at least two ply cellulose pads (1a,1b). These are cut to required form and joined together along a peripheral border (3), by adhesive. The join presents a minimal resistance to delamination of 1 g/cm., the border area being less than 50% of total tissue surface area. The adhesive may be on the border of each ply, distributed as discontinuous spots (5). Alternatively, the borders may also be embossed, like waffles. The several ply may have differing composition.

Description

PRODUIT STRATIFIE EN OUATE DE CELLULOSE LAMINATE PRODUCT IN CELLULOSE WADDING
L'invention se rapporte au domaine du papier sanitaire et domestique ; elle vise la réalisation de produits stratifiés composés d'au moins deux plis ou feuille d'ouate de cellulose, notamment à usage de mouchoir, serviette de table ou autres applications similaires.The invention relates to the field of sanitary and domestic paper; it relates to the production of laminated products composed of at least two plies or cellulose wadding sheet, in particular for the use of a handkerchief, napkin or other similar applications.
Les mouchoirs en papier, conditionnés généralement en étui, que l'on trouve actuellement dans le commerce sont constitués de plusieurs feuilles de papier absor¬ bant crêpé, désigné également ouate de cellulose, supeφosées, et maintenues ensemble par une liaison mécanique à la périphérie. Cette liaison est obtenue par une opération de gaufrage, du type acier/acier ou acier/papier, selon laquelle on fait passer les feuilles entre deux cylindres engrenant l'un sur l'autre. Un des cylindres comporte des reliefs en surface et l'autre des cavités correspondantes. Les feuilles sont ainsi déformées localement en des zones qui constituent des points d'attache. Un motif de gaufrage connu est constitué d'une multitude de pointes de faible diamètre et de faible hauteur serrées les unes contre les autres linéairement, ou selon les deux directions sens marche et sens travers. Un autre motif connu est constitué de fines barres d'arêtes disposées en parallèles serrées. Ce mode de liaison donne satisfaction lorsque le grammage des plis n'est pas trop élevé, de l'ordre de 10 à 20 g/m2, et lorsque l'on uti¬ lise de l'ouate de cellulose sans additif.The handkerchiefs, generally packaged in cases, which are currently found on the market are made up of several sheets of creped absorbent paper, also called cellulose wadding, supeφosed, and held together by a mechanical connection at the periphery. This connection is obtained by an embossing operation, of the steel / steel or steel / paper type, according to which the sheets are passed between two cylinders meshing one on the other. One of the cylinders has reliefs on the surface and the other has corresponding cavities. The sheets are thus locally deformed into zones which constitute attachment points. A known embossing pattern consists of a multitude of spikes of small diameter and of small height tightened against each other linearly, or in both directions in the running direction and in the transverse direction. Another known pattern consists of fine edge bars arranged in tight parallels. This bonding method is satisfactory when the grammage of the plies is not too high, of the order of 10 to 20 g / m 2 , and when using cellulose wadding without additives.
Cependant il présente un certain nombre d'inconvénients :However, it has a number of drawbacks:
- le choix des motifs de gaufrage est limité ; il est guidé par la nécessité d'ob¬ tenir un accrochage entre les plis ;- the choice of embossing patterns is limited; it is guided by the need to obtain a hook between the folds;
- il devient inopérant lorsque l'on souhaite utiliser des papiers présentant des caractéristiques différentes entre les plis, un allongement différentiel entre les plis par exemple ou bien une différence de composition fibreuse ou chimique. Ainsi l'addition d'un produit à effet déliant destiné à conférer de la douceur au papier n'est pas possi¬ ble. On constate dans ce cas qu'il ne se produit aucun accrochage entre les plis.- It becomes ineffective when it is desired to use papers having different characteristics between the folds, a differential elongation between the folds for example or else a difference in fibrous or chemical composition. Thus the addition of a deliant effect product intended to impart softness to the paper is not possible. It is noted in this case that there is no snagging between the folds.
- Le gaufrage donne un aspect rugueux qui se révèle désagréable pour une application en tant que mouchoir ;- The embossing gives a rough appearance which proves unpleasant for application as a handkerchief;
L'invention remédie à ces inconvénients en fournissant un produit, tel que mouchoir ou serviette, réalisé par association d'au moins deux plis individuels, ou feuilles, d'ouate de cellulose superposés, découpés au format désiré et liés entre eux le long d'une zone périphérique caractérisée en ce que lesdits plis sont liés par collage le long de ladite zone de manière à présenter une résistance minimale à la delamination de 1 g/cm, ladite zone périphérique représentant moins de 50 % de la surface totale du produitThe invention remedies these drawbacks by providing a product, such as a handkerchief or towel, produced by combining at least two individual plies, or sheets, of superimposed cellulose wadding, cut to the desired format and linked together along '' a peripheral zone characterized in that said folds are bonded by bonding along said zone so as to have a minimum resistance to delamination of 1 g / cm, said peripheral zone representing less than 50% of the total surface of the product
Le collage est effectué au moyen de tout produit adhésif généralement utilisé dans le domaine des papiers sanitaires et domestiques pour associer des plis entre eux tel que, par exemple, un alcool polyvinylique en solution dans un milieu aqueux.Bonding is carried out using any adhesive product generally used in the field of sanitary and household papers to associate folds together. such as, for example, a polyvinyl alcohol in solution in an aqueous medium.
De préférence, le collage est réalisé le .'ong des quatre bords des plis. On sup¬ pose, pour simplifier, qu'il s'agit d'un format rectangulaire ou carré. L'invention comprend également le cas où seulement deux bords opposés sont liés.Preferably, the bonding is carried out along the four edges of the folds. It is assumed, for simplicity, that it is a rectangular or square format. The invention also includes the case where only two opposite edges are linked.
Le collage est effectué le long d'une zone périphérique couvrant une bande dont la largeur peut varier entre une limite inférieure correspondant à une résistance suffisante à la delamination et une limite supérieure où le produit deviendrait trop ri¬ gide. La zone liée doit représenter moins de 50 % du produit : mouchoir ou serviette de table. Selon un mode de réalisation particulièrement préféré, ladite zone représente entre 30 et 40 % de la surface totale.The bonding is carried out along a peripheral zone covering a strip the width of which can vary between a lower limit corresponding to sufficient resistance to delamination and an upper limit where the product would become too stiff. The linked area must represent less than 50% of the product: handkerchief or napkin. According to a particularly preferred embodiment, said zone represents between 30 and 40% of the total surface.
Le long de cette zone, le collage peut être effectué par enduction continue d'adhésif mais aussi par application de celui-ci sur une pluralité de surfaces de faible étendue disposées selon un motif linéaire ou selon des points répartis uniformément. Un mode de liage préféré est alors dans ce dernier cas, celui décrit dans la demande de brevet français 89 14202 qui permet d'assurer un dépôt de colle uniforme dans la zone liaison sans rigidifier la feuille.Along this zone, the bonding can be carried out by continuous coating of adhesive but also by application thereof on a plurality of surfaces of small extent arranged in a linear pattern or according to points distributed uniformly. A preferred method of binding is then in the latter case, that described in French patent application 89 14202 which makes it possible to ensure a uniform deposit of adhesive in the bonding area without stiffening the sheet.
Certes, la Demanderesse n'ignore pas qu'il est déjà connu de réaliser des ser¬ viettes en ouate de cellulose où les plis sont collés entre eux. Ainsi, par exemple, le brevet US 3673060 décrit une serviette de table réalisée de cette manière : deux plis de ouate de cellulose sont placés l'un sur l'autre de façon que leurs lignes de crêpage soient parallèles entre elles, et sont collés entre eux par points. Il est à noter que ce collage est uniformément réparti sur toute la surface de la serviette suivant des points rapprochés ; un collage limité aux bords de la feuille n'est pas envisagé.Admittedly, the Applicant is not unaware that it is already known to produce towels made of cellulose wadding where the folds are glued together. Thus, for example, US Pat. No. 3,673,060 describes a table napkin produced in this way: two plies of cellulose wadding are placed one on the other so that their creping lines are parallel to each other, and are glued between them by points. It should be noted that this bonding is uniformly distributed over the entire surface of the towel according to close points; bonding limited to the edges of the sheet is not envisaged.
Ce type de produit n'est pas satisfaisant dans la mesure où la zone centrale, fonctionnelle, présente un état de surface et une souplesse plus ou moins altérés par le collage.This type of product is not satisfactory insofar as the central, functional zone has a surface state and a flexibility more or less affected by the bonding.
La solution proposée permet de réaliser des produits stratifiés de type mou¬ choirs, serviettes ou autres produits semblables, c'est-à-dire se présentant sous la forme de feuilles individuelles, possédant une excellente résistance à la delamination sans pour autant être rendues rigides au centre, c'est-à-dire dans la zone fonctionnelle d'utilisation, ni être susceptibles d'irriter la peau par le collage. Les tests montrent que l'on peut obtenir très facilement des produits dont la résistance à la delamination est largement supérieure à celle d'une liaison mécanique de l'art antérieur. Ainsi la solution proposée offre de nombreux avantages :The proposed solution makes it possible to produce laminated products such as choppers, towels or the like, that is to say in the form of individual sheets, having excellent resistance to delamination without being made rigid. in the center, that is to say in the functional area of use, or be likely to irritate the skin by bonding. The tests show that it is very easy to obtain products whose resistance to delamination is much higher than that of a mechanical bond of the prior art. Thus the proposed solution offers many advantages:
- Le nombre de possibilités offertes au fabricant pour décorer son produit et le rendre plus attractif est considérablement accru.- The number of possibilities offered to the manufacturer to decorate his product and make it more attractive is considerably increased.
Par exemple, il peut ne pas être gaufré à la périphérie ; il reste alors parfaitement plat et son conditionnement est plus facile ;For example, it may not be embossed at the periphery; it then remains perfectly flat and its packaging is easier;
- On peut teinter la colle de manière à créer un effet de liséré plaisant à l'oeil. L'adhésif étant appliqué entre les plis, les pigments ne sont pas susceptibles de venir au contact de la peau ;- You can tint the glue to create an edging effect pleasing to the eye. The adhesive being applied between the folds, the pigments are not likely to come into contact with the skin;
- On peut choisir un motif de gaufrage quelconque sans aucune contrainte sur la forme des reliefs, le motif du gaufrage et le type d'association : pointe/pointe ou emboîté ; on n'est pas lié par la nécessité d'assurer une liaison mécanique entre les feuilles par ce moyen.- You can choose any embossing pattern without any constraint on the shape of the reliefs, the embossing pattern and the type of association: tip / tip or nested; one is not bound by the need to ensure a mechanical connection between the sheets by this means.
Conformément à une autre caractéristique de l'invention, on associe par col¬ lage périphérique des feuilles présentant des compositions fibreuses et/ou chimiques différentes.According to another characteristic of the invention, sheets having a different fibrous and / or chemical composition are combined by peripheral bonding.
Conformément à un mode de réalisation particulier, on associe une feuille in¬ corporant un additif pour accroître la résistance à l'état humide du papier à au moins une feuille sans additif ou bien incorporant un additif pour améliorer la douceur. On obtient de la sorte un complexe stratifié combinant des propriétés que l'on ne peut trouver ensemble sur un produit à couche unique.According to a particular embodiment, a sheet incorporating an additive is added to increase the resistance in the wet state of the paper to at least one sheet without additive or incorporating an additive to improve the softness. This results in a laminate complex combining properties that cannot be found together on a single-layer product.
Conformément à un autre mode de réalisation, on associe des plis réalisés avec des pâtes différentes. Par exemple, pour un mouchoir à trois plis, on peut choisir de réaliser le pli central avec des pâtes de moindre coût que les plis de couverture, telles que CTMP ou au bisulfite.According to another embodiment, we combine folds made with different pastes. For example, for a three-ply handkerchief, one can choose to make the central ply with pastes of lower cost than the cover plies, such as CTMP or bisulfite.
Il est certain également que l'on peut y incorporer ou non des additifs chimi¬ ques connus de l'homme du métier.It is also certain that it is possible to incorporate therein or not chemical additives known to those skilled in the art.
D'autres caractéristiques et avantages apparaîtront à la lecture de la descrip¬ tion non limitative qui suit faisant référence aux dessins annexés sur lesquelsOther characteristics and advantages will appear on reading the non-limiting description which follows, referring to the attached drawings in which
La Figure 1 représente un produit, mouchoir par exemple, avec une zone de liaison périphérique des différents plis. Un coin a été délaminé pour montrer les plis.Figure 1 shows a product, handkerchief for example, with a peripheral connection area of the different folds. A corner has been delaminated to show the folds.
La Figure 2 représente une installation susceptible de permettre la réalisation d'un produit selon l'invention.Figure 2 shows an installation capable of allowing the production of a product according to the invention.
La Figure 3 représente un détail de l'installation de la Figure 2. Sur la Figure 1 on a représenté schématiquement, et vu de dessus, un mou¬ choir ou une serviette de table (1) de format carré constitué de 3 feuilles (la, lb, le) d'ouate de cellulose liées entre elles, par collage à la périphérie, le long d'une zone (3) de largeur déterminée. Selon le mode de réalisation représenté, le collage a été effec¬ tué par points (5) de manière à ne pas rigidifier le complexe ; conformément à l'in¬ vention, la zone centrale n'est pas encollée ; elle peut, le cas échéant, comporter un gaufrage visant à en améliorer l'aspect.Figure 3 shows a detail of the installation of Figure 2. In Figure 1 there is shown schematically, and seen from above, a choir or a napkin (1) square format consisting of 3 sheets (the , lb, le) of cellulose wadding bonded together, by bonding at the periphery, along an area (3) of determined width. According to the embodiment shown, the bonding was effected by points (5) so as not to stiffen the complex; in accordance with the invention, the central area is not glued; it may, if necessary, include an embossing intended to improve the appearance thereof.
La zone périphérique (3) couvre moins de 50 % de la surface totale du mou¬ choir ou de la serviette, de préférence cette zone en représente 30 % à 40 %.The peripheral zone (3) covers less than 50% of the total surface of the towel or towel, preferably this zone represents 30% to 40%.
Par exemple une serviette de table de dimension 40 cm x 40 cm sera bordée par une bande de liaison formée par le collage des feuilles depuis la ligne de bord sur une largeur de 4 cm. La zone liée couvre ainsi 36 % de la surface totale de la serviette Selon une forme particulièrement préférée de l'invention, la liaison part effecti¬ vement du bord des plis de façon à éviter tout bâillement des plis ou bien la formation de pliures à la périphérie qui nuisent à l'aspect du produit.For example, a napkin of dimension 40 cm x 40 cm will be bordered by a connecting strip formed by gluing the sheets from the edge line over a width of 4 cm. The linked area thus covers 36% of the total surface of the towel According to a particularly preferred form of the invention, the connection effectively leaves the edge of the folds so as to avoid any yawning of the folds or else the formation of folds at the periphery which adversely affect the appearance of the product.
Pour réaliser ce type de produit on peut utiliser toute installation connue, par exemple celle représentée à la Figure 2. Les plis (11) et (12), l'un étant éventuellement double, de ouate de cellulose venant de leur dévidoir respectif, non représentés, sont guidés pour venir passer autour des cylindres en caoutchouc (13) et (14) puis entre ceux-ci et des cylindres gaufreurs (15) et (16) en acier pourvus de reliefs appropriés. Ces reliefs peuvent être répartis selon le motif de la Figure 1, par exemple. L'un des plis (12) est encollé au moyen d'un cylindre applicateur (18) en caoutchouc représenté à la Figure 3. Ce cylindre comporte, conformément à un mode de réalisation de l'in¬ vention, une partie (181) en relief dont le dessin correspond à celui de la zone périphérique d'encollage des feuilles, de façon que la colle entraînée par le cylindre applicateur soit répartie selon ce motif. Selon ce mode de réalisation on peut gaufrer une ou les deux feuilles sur toute leur surface. L'encollage n'est effectué que sur la périphérie correspondant à la partie (181) du cylindre d'encollage. Selon un autre mode de réalisation, l'un ou les deux cylindres (15, 16) sont pourvus de reliefs, le long d'une zone périphérique du format de produit désiré. On peut alors utiliser un cylindre d'encollage lisse.To make this type of product, any known installation can be used, for example the one shown in Figure 2. The folds (11) and (12), one being optionally double, of cellulose wadding coming from their respective reel, not shown, are guided to come around the rubber cylinders (13) and (14) then between them and embossing cylinders (15) and (16) in steel provided with appropriate reliefs. These reliefs can be distributed according to the pattern in Figure 1, for example. One of the folds (12) is glued by means of a rubber applicator cylinder (18) shown in FIG. 3. This cylinder comprises, in accordance with one embodiment of the invention, a part (181) in relief, the design of which corresponds to that of the peripheral area for gluing the sheets, so that the adhesive entrained by the applicator cylinder is distributed according to this pattern. According to this embodiment, one or both sheets can be embossed over their entire surface. Gluing is only carried out on the periphery corresponding to the part (181) of the gluing cylinder. According to another embodiment, one or both cylinders (15, 16) are provided with reliefs, along a peripheral zone of the desired product format. We can then use a smooth gluing cylinder.
Après encollage, les plis (11) et (12) sont assemblés dans l'intervalle de pince¬ ment ménagé entre les cylindres gaufreurs (15) et (16) qui tournent à des vitesses égales et opposées. La feuille multipli issue du dispositif est entraînée vers une instal¬ lation de transformation où elle est découpée et pliée conformément à l'application envisagée : mouchoirs, serviettes ou autres.After gluing, the folds (11) and (12) are assembled in the pincer interval formed between the embossing cylinders (15) and (16) which rotate at equal and opposite speeds. The multi-ply sheet from the device is driven to a processing facility where it is cut and folded in accordance with the intended application: handkerchiefs, towels or the like.
Selon une variante du procédé, les plis (11) et (12) peuvent être issus d'une même bobine à 2 plis, et avoir été soumis à un calandrage commun de façon à opérer un lissage de la face extérieure et conférer une plus grande douceur. Ensuite, seule¬ ment, les deux nappes sont séparées pour être gaufrées séparément et individuellement.According to a variant of the method, the plies (11) and (12) can come from the same coil with 2 plies, and have been subjected to a common calendering so as to effect a smoothing of the external face and confer greater sweetness. Then, only the two layers are separated to be embossed separately and individually.
Selon une autre variante du procédé, non représentée, on gaufre un pli, simple ou double, entre un cylindre en caoutchouc et un cylindre acier convenablement gravé, c'est-à-dire avec des reliefs selon la périphérie du format de produit désiré. On dépose l'adhésif sur les sommets des reliefs. Enfin on vient appliquer sur le pli un se¬ cond respectivement troisième pli, au moyen d'un troisième cylindre en caoutchouc de type marieur. Ce troisième cylindre assure à la fois le gaufrage du second respectivement troisième pli et son mariage avec le premier. Pour le troisième cylindre on peut utiliser également un cylindre acier ou en papier.According to another variant of the process, not shown, a fold, single or double, is embossed between a rubber cylinder and a suitably engraved steel cylinder, that is to say with reliefs according to the periphery of the desired product format. The adhesive is deposited on the tops of the reliefs. Finally, a second fold is applied to the fold respectively, using a third rubber cylinder of the matchmaker type. This third cylinder ensures both the embossing of the second respectively third fold and its marriage with the first. For the third cylinder, a steel or paper cylinder can also be used.
On a réalisé un essai pour tester le comportement du produit à la delamination par rapport à un mouchoir témoin. On a confectionné un mouchoir en liant, au moyen d'une colle en solution dans l'eau, PVA, 3 plis de format 21,5 x 21,5 cm, à la périphérie sur une bande de 2 cm de large.A test was carried out to test the behavior of the product on delamination compared to a control handkerchief. A handkerchief was made by tying, using an adhesive in solution in water, PVA, 3 folds of format 21.5 x 21.5 cm, at the periphery on a strip of 2 cm wide.
On a découpé des éprouvettes de 15 mm de large dans la zone liée des mou¬ choirs et on a procédé au test de delamination à 180°. Ce test consiste à mesurer la force moyenne de delamination d'une éprouvette à une vitesse constante déterminée de 100 mm/min. Pour cela on enserre entre deux paires de mâchoires les extrémités de deux plis dont on veut mesurer la force de delamination, on écarte les deux paires de mâchoires l'une de l'autre, à vitesse constante, et on mesure la force exercée. Sa valeur est ramenée à l'unité de largeur.15 mm wide test pieces were cut in the bonded area of the handkerchiefs and the delamination test was carried out at 180 °. This test consists in measuring the average delamination force of a test piece at a determined constant speed of 100 mm / min. For this, the ends of two folds are clamped between two pairs of jaws, the delamination force of which is to be measured, the two pairs of jaws are separated from one another, at constant speed, and the force exerted is measured. Its value is reduced to the unit of width.
Delamination à 180° témoin lié par échantillon simple gaufrage avec collage de l'art antérieurDelamination at 180 ° bonded witness by simple embossing sample with bonding of the prior art
Force moyenne (g/ cm)/ force maximale relevéeAverage force (g / cm) / maximum force noted
SM 0.55/1 2.4/6.4 ST 0.65/1 6.2/20SM 0.55 / 1 2.4 / 6.4 ST 0.65 / 1 6.2 / 20
On constate donc que le collage permet de réaliser un produit offrant une ré¬ sistance à la delamination fortement accrue, aussi bien sens marche (SM) que sens travers (ST).It can therefore be seen that bonding makes it possible to produce a product offering a greatly increased resistance to delamination, both in the forward direction (SM) and in the cross direction (ST).
Des mesures effectuées par ailleurs, sur un grand nombre d'échantillons de produits existants dans le commerce ont permis de constater que, quel que soit le mo¬ tif de gaufrage réalisé soit à partir de pointes soit à partir de barres d'arêtes, on ne peut obtenir de façon constante de liaison mécanique dont la résistance à la delamina¬ tion atteint 1 g/cm sens marche ou sens travers.Measurements carried out moreover, on a large number of samples of products existing on the market have shown that, whatever the embossing pattern produced either from tips or from edge bars, can not obtain a constant mechanical connection whose resistance to delamina¬ tion reaches 1 g / cm running direction or cross direction.
Exemples :Examples:
Produit IProduct I
On a confectionné un mouchoir à partir de 3 plis d'ouate de cellulose, consti¬ tuée de 60 % de fibres de résineux et de 40 % de fibres de feuillus, ayant chacun un grammage de 18 g/m^ et incorporant un additif, à raison de 1,5 kg par tonne ayant un effet déliant sur les fibres pour améliorer la douceur (produit commercialisé par la so¬ ciété ENKA NOBEL sous la marque BEROCELL 595). La liaison a été réalisée par collage périphérique. Un tel produit ne serait pas réalisable avec la technique anté¬ rieure de gaufrage périphérique du fait de la présence de l'additif Produit IIA handkerchief was made from 3 plies of cellulose wadding, made up of 60% softwood fibers and 40% hardwood fibers, each having a basis weight of 18 g / m 2 and incorporating an additive, at a rate of 1.5 kg per ton having a deliant effect on the fibers to improve the softness (product marketed by the ENKA NOBEL company under the brand BEROCELL 595). The connection was made by peripheral bonding. Such a product would not be possible with the prior technique of peripheral embossing due to the presence of the additive. Product II
On a confectionné un mouchoir avec un pli central réalisé à partir d'un mé¬ lange de pâtes de résineux (75 %), de feuillus (10 %) et d'une pâte chimicothermomé- canique (grammage : 21 g/m2) incorporant un additif améliorant ses caractéristiques de résistance quand il est à l'état humide (produit commercialisé par la société HERCULES sous la marque KYMENE 557 H), et deux plis de couverture réalisés avec un mélange de pâtes de résineux (65 %) et de feuillus (35 %) (grammage : 14,5 g/m2) incorporant un additif (BEROCELL 595) pour la douceur. La liaison a été réalisée par collage périphérique.We made a handkerchief with a central fold made from a mixture of softwood pulp (75%), hardwood (10%) and a chemical thermal paste (grammage: 21 g / m 2 ) incorporating an additive improving its resistance characteristics when it is in the wet state (product marketed by the company HERCULES under the brand KYMENE 557 H), and two cover plies made with a mixture of softwood pulp (65%) and hardwood (35%) (grammage: 14.5 g / m 2 ) incorporating an additive (BEROCELL 595) for softness. The connection was made by peripheral bonding.
Produit IIIProduct III
On a confectionné un mouchoir témoin à partir de 3 plis (18 g/m2) sans additifWe made a control handkerchief from 3 plies (18 g / m 2 ) without additives
- Liaison par gaufrage.- Connection by embossing.
La mesure des résistances, sèche et humide et de l'éclatement, a été effectuée sur des éprouvettes de 15 mm de large découpées dans la zone de liaison des plis et est exprimée en longueur de rupture pour chacun des trois produits (cm) rassemblés dans le tableau ci-dessous :The measurement of the resistances, dry and wet and of the bursting, was carried out on specimens of 15 mm wide cut out in the zone of connection of the folds and is expressed in length of rupture for each of the three products (cm) gathered in the table below:
Par rapport à l'échantillon témoin III, on constate que l'invention permet la réalisation de produits présentant un large éventail de caractéristiques selon l'applica¬ tion envisagée. Compared to the control sample III, it can be seen that the invention allows the production of products having a wide range of characteristics depending on the application envisaged.

Claims

REVENDICATIONS
1) Produit cellulosique fibreux tel que mouchoir ou serviette, réalisé par asso¬ ciation d'au moins deux plis individuels, ou feuilles, d'ouate de cellulose, supeφosés, découpés au format désiré et liés entre eux le long d'une zone périphérique caractérisé en ce que lesdits plis sont liés le long de ladite zone par collage, de manière à présen¬ ter une résistance minimale à la delamination de 1 g/cm, ladite zone périphérique re¬ présentant moins de 50 % de la surface totale du produit.1) Fibrous cellulosic product such as handkerchief or towel, produced by combining at least two individual plies, or sheets, of cellulose wadding, supeφosed, cut to the desired format and linked together along a peripheral zone characterized in that said folds are bonded along said zone by bonding, so as to present a minimum resistance to delamination of 1 g / cm, said peripheral zone re¬ having less than 50% of the total surface of the product .
2) Produit selon la revendication 1 caractérisé en ce que le collage est réalisé sur tout le pourtour des feuilles.2) Product according to claim 1 characterized in that the bonding is carried out around the entire periphery of the sheets.
3) Produit selon l'une des revendications précédentes caractérisé en ce que la colle est déposée par points répartis dans ladite zone de manière discontinue.3) Product according to one of the preceding claims, characterized in that the glue is deposited by points distributed in said zone discontinuously.
4) Produit selon l'une des revendications précédentes caractérisé en ce qu'il présente un gaufrage dans la zone de liaison.4) Product according to one of the preceding claims characterized in that it has an embossing in the bonding area.
5) produit selon l'une des revendications précédentes caractérisé en ce que les plis ont des compositions chimiques et/ou fibreuses différentes.5) product according to one of the preceding claims, characterized in that the plies have different chemical and / or fibrous compositions.
6) Produit selon la revendication 5 caractérisé en ce que l'un des plis comprend un additif améliorant les caractéristiques mécaniques de la feuille à l'état humide.6) Product according to claim 5 characterized in that one of the plies comprises an additive improving the mechanical properties of the sheet in the wet state.
7) Produit selon la revendication 5 ou 6 caractérisé en ce que l'un des plis comprend un additif améliorant la douceur.7) Product according to claim 5 or 6 characterized in that one of the plies comprises an additive improving the softness.
8) Produit selon l'une des revendications 5 à 7 caractérisé en ce que les plis sont réalisés avec des pâtes différentes. 8) Product according to one of claims 5 to 7 characterized in that the folds are made with different pastes.
EP94900863A 1992-11-24 1993-11-22 Laminated product made of cellulose wad Expired - Lifetime EP0670773B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP97100688A EP0776758B1 (en) 1992-11-24 1993-11-22 Method end apparatus for producing a laminated product made of cellulose wad

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9214063A FR2698314B1 (en) 1992-11-24 1992-11-24 Laminated product in cellulose wadding.
FR9214063 1992-11-24
PCT/FR1993/001146 WO1994012343A1 (en) 1992-11-24 1993-11-22 Laminated product made of cellulose wad

Related Child Applications (2)

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EP97100688A Division EP0776758B1 (en) 1992-11-24 1993-11-22 Method end apparatus for producing a laminated product made of cellulose wad
EP97100688.7 Division-Into 1997-01-17

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EP97100688A Expired - Lifetime EP0776758B1 (en) 1992-11-24 1993-11-22 Method end apparatus for producing a laminated product made of cellulose wad

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EP (2) EP0670773B1 (en)
AT (2) ATE156062T1 (en)
CA (1) CA2150023C (en)
DE (2) DE69312730T2 (en)
DK (2) DK0776758T3 (en)
ES (2) ES2105600T3 (en)
FI (1) FI115125B (en)
FR (1) FR2698314B1 (en)
GR (1) GR3024908T3 (en)
NO (1) NO316430B1 (en)
PT (1) PT776758E (en)
WO (1) WO1994012343A1 (en)

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Also Published As

Publication number Publication date
CA2150023C (en) 2006-01-17
NO952026L (en) 1995-07-19
EP0670773B1 (en) 1997-07-30
GR3024908T3 (en) 1998-01-30
EP0776758A2 (en) 1997-06-04
DK0776758T3 (en) 2002-03-18
ATE212904T1 (en) 2002-02-15
DK0670773T3 (en) 1997-10-20
CA2150023A1 (en) 1994-06-09
FI115125B (en) 2005-03-15
FI952513A (en) 1995-05-23
ES2170289T3 (en) 2002-08-01
FR2698314B1 (en) 1994-12-23
DE69312730D1 (en) 1997-09-04
PT776758E (en) 2002-07-31
US6048603A (en) 2000-04-11
FR2698314A1 (en) 1994-05-27
EP0776758B1 (en) 2002-02-06
ES2105600T3 (en) 1997-10-16
FI952513A0 (en) 1995-05-23
EP0776758A3 (en) 1998-03-11
NO316430B1 (en) 2004-01-26
ATE156062T1 (en) 1997-08-15
WO1994012343A1 (en) 1994-06-09
DE69331555D1 (en) 2002-03-21
NO952026D0 (en) 1995-05-22
DE69331555T2 (en) 2002-08-22
DE69312730T2 (en) 1997-11-27

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