EP3590400A1 - Roll of fibrous cellulose-based product - Google Patents

Roll of fibrous cellulose-based product Download PDF

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Publication number
EP3590400A1
EP3590400A1 EP19193632.7A EP19193632A EP3590400A1 EP 3590400 A1 EP3590400 A1 EP 3590400A1 EP 19193632 A EP19193632 A EP 19193632A EP 3590400 A1 EP3590400 A1 EP 3590400A1
Authority
EP
European Patent Office
Prior art keywords
sheet
roll
pattern
sheets
peripheral zone
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
EP19193632.7A
Other languages
German (de)
French (fr)
Other versions
EP3590400B1 (en
Inventor
Donald Barredo
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
Essity Operations France SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Essity Operations France SAS filed Critical Essity Operations France SAS
Priority to EP22160956.3A priority Critical patent/EP4029420A1/en
Publication of EP3590400A1 publication Critical patent/EP3590400A1/en
Application granted granted Critical
Publication of EP3590400B1 publication Critical patent/EP3590400B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
    • A47K10/00—Body-drying implements; Toilet paper; Holders therefor
    • A47K10/16—Paper towels; Toilet paper; Holders therefor
    • 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
    • Y10T428/15—Sheet, web, or layer weakened to permit separation through thickness
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
    • Y10T428/24446—Wrinkled, creased, crinkled or creped
    • Y10T428/24455—Paper
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
    • Y10T428/24446—Wrinkled, creased, crinkled or creped
    • Y10T428/24455—Paper
    • Y10T428/24463—Plural paper components
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
    • Y10T428/24826—Spot bonds connect components

Definitions

  • the present invention relates to the field of cellulose wadding products for sanitary or domestic use and relates in particular to products in rolls such as rolls of toilet paper (or toilet paper) and the like.
  • It relates to a roll composed of articles based on a (or essentially made of) a fibrous cellulosic product. More particularly and according to a preferred embodiment, it relates to a roll of which certain sheets, and even more preferably of which each sheet which composes it, has a single unique pattern entirely included in the format of said sheet or sheets, that is that is to say which is not cut by one or more of the four edges which delimit the sheet (generally of rectangular shape or surface).
  • the different superimposed folds of the same size are, depending on the intended use of the sheet and / or the requirements imposed by the wishes of the consumer and / or the constraints of production techniques, more or less strongly linked together using different joining techniques of said plies.
  • association of the plies in a multiply product essentially of cellulose wadding is carried out by applying an adhesive between said plies.
  • Said bonding is carried out by means of any adhesive product generally used in the field of sanitary and household papers for associating folds together such as, for example, an alcohol. polyvinyl in solution in an aqueous medium.
  • This association by gluing can be combined with another type, just as classic, of association of folds which is purely mechanical and which consists in locally deforming, by crushing, the folds to be bound so that the latter, nested one inside the other under the pressure of a cylinder, are held together once the association operation is completed.
  • the adhesive has hitherto been deposited uniformly over the entire surface of the folds of the wound product.
  • the removal of the glue being associated with the embossing pattern this requires an embossing pattern which covers the entire surface of the product.
  • the patterns currently used are therefore relatively small in size and repeated a number of times in the forward and cross direction of each sheet, usually with at least two similar or identical patterns per sheet of paper, for example toilet paper.
  • the resistance at the level of the embossing patterns is weakened in the area of use due in particular to the destruction of the fibers.
  • the present invention aims to overcome at least some of these drawbacks.
  • association points have been moved towards the periphery of the product, that is to say of the sheet and preferably of each sheet present on said roller.
  • Said technical zone which can group together several portions of disjoint zones (which also leave from one or more edges towards the center of the sheet) serves mainly to ensure the association of the plies and gives a certain desired peripheral rigidity, in particular by the consumer himself.
  • the surface of the technical area therefore varies between a lower limit corresponding to sufficient resistance to delamination and an upper limit where the product would become too rigid.
  • Said usage zone which can also group together several portions of disjoint zones (at or near the center of the sheet) is used mainly to impart softness, thickness, flexibility, a barrier effect (diffusion) and / or resistance (for example to piercing).
  • the present invention therefore relates to a roll of sheets based on a fibrous cellulosic product, such as toilet paper, comprising a rolled up strip consisting of a continuous succession of sheets based on cellulose wadding produced by combining at least two individual folds, each sheet being retained, with the option of detachment, with the adjacent sheet or sheets by one or two pre-cut lines, respectively, characterized in that said at least two individual folds of each sheet are bonded or by mechanical pressure along a peripheral zone of each sheet and in that the surface of said peripheral zone represents between 4% and 60% of the total surface of each sheet.
  • a fibrous cellulosic product such as toilet paper
  • the invention also relates to a roller characterized in that at least one sheet, preferably each sheet, present in its central zone not forming part of the peripheral zone, at least one pattern produced by embossing and / or dry marking.
  • the present invention therefore relates to a roll 1 of sheets 2 based on a fibrous cellulosic product, such as toilet paper, comprising a rolled up strip consisting of a continuous succession of sheets 2 based on cellulose wadding produced by association of at least two individual folds 3, each sheet 2 being retained, with the option of detachment, with the adjacent sheet or sheets 2 by one, respectively two pre-cut lines 4, characterized in that said at least two folds 3 individuals of each sheet 2 are bonded by bonding or by mechanical pressure along a peripheral zone 5 of each sheet 2 and in that the surface of said peripheral zone 5 represents between 4% and 60% of the total surface of each sheet 2.
  • a fibrous cellulosic product such as toilet paper
  • the aforementioned surface represents between 50% (excluded) and 60% (included) of the total surface of each sheet 2.
  • connection between said at least two individual plies 3 of each sheet 2 is carried out by gluing.
  • a sheet 2 is made up of at least two individual folds 3 superimposed, generally of the same size and of the same rectangular or even square shape, the standard dimensions of which usually vary between 90 mm and 140 mm for the length (therefore in the running direction SM , that is to say parallel to the direction of travel of the wound product) and between 80 mm and 110 mm for the width (therefore in the transverse direction ST, that is to say perpendicular to the direction of travel of the wound product ).
  • the other folds may be simple folds provided on their entire face with a regular continuous and uniform micro-embossing consisting of standard protuberances at a density of at least 20 protuberances / cm 2 , preferably at due to density included between 30 and 100 protuberances / cm 2 .
  • the folds 3, for example six in number, can be linked together thanks to a peripheral bonding, for example a bonding obtained by applying glue to a conventional embossing consisting of protrusions whose vertices are of circular shape with a diameter between 0.1 mm and 1.5 mm, preferably between 0.6 mm and 1.1 mm evenly distributed according to a density of protuberances between 5 protuberances / cm 2 and 80 protuberances / cm 2 , preferably between 5 protuberances / cm 2 and 30 protrusions / cm 2 .
  • a peripheral bonding for example a bonding obtained by applying glue to a conventional embossing consisting of protrusions whose vertices are of circular shape with a diameter between 0.1 mm and 1.5 mm, preferably between 0.6 mm and 1.1 mm evenly distributed according to a density of protuberances between 5 protuberances / cm 2 and 80 protuberances / cm 2 , preferably between 5 protuberances
  • bonding can be carried out by applying an adhesive to any embossing pattern but located in the peripheral zone 5, such as that resulting from the particular embossing shown in more detail in the figure 2 for another example of roller 1 according to the invention.
  • a preferred mode of binding is that described in the French patent published under the number FR-A-2 653 793 which ensures a uniform glue deposit in the bonding area without stiffening the sheet.
  • connection between said at least two individual plies 3 of each sheet 2 can be carried out by any mechanical connection known to those skilled in the art making it possible to associate, in a purely physical manner, at least two plies 3 between them, for example by mechanical pressure, embossing, knurling, etc.
  • the number of individual plies 3 forming each sheet 2 can be between two and ten and preferably between four and seven individual plies 3.
  • the folds 3 are normally made of cellulose wadding (pure or majority) with a grammage of between 10 g / m 2 and 50 g / m 2 and may include the additives conventionally used in this field insofar as the latter do not not critically interfere with the other technical features of the invention.
  • the grammages and the nature of the plies 3 can vary from one ply 3 to another but are preferably the same or substantially the same for all the plies 3 or for a large part of the plies 3.
  • the grammage of each sheet 2 is understood between 30 g / m 2 and 150 g / m 2 , preferably between 85 g / m 2 and 115 g / m 2 .
  • the roller 1 according to the invention is characterized in that the totality of the connecting surfaces between said plies 3 of at least one sheet 2, preferably of each sheet 2, is less than the surface covered by said peripheral zone 5.
  • the connection surface between said plies 3 at least at least one sheet 2, preferably of each sheet 2 is between 1% and 50%, preferably between 3% and 7% of the total surface covered by said peripheral zone 5.
  • the connecting surface has been adjusted so as to preserve the flexibility of the strip of the roll 1 formed by the succession of the sheets 2 when these are still attached to each other in order in particular to ensure a good winding of the said sheets 2 while keeping good resistance to delamination of the latter.
  • peripheral zone 5 is meant the zone starting from one or more edges, or even from all four edges or ends of the surface defining the sheet 2 (by including or including them) and extending in the direction of the center. of said sheet 2. This avoids any yawning of the folds 3 or the formation of folds which harm the appearance of the product.
  • An example of a simple geometry of this peripheral zone 5 is a continuous rectilinear strip of constant thickness going all around said rectangular sheet 2.
  • the shape of said peripheral zone 5 can be irregular and / or discontinuous and / or curvilinear, etc., as long as it can define a surface in which the association between the plies 3 to be bonded takes place and that it is located on the periphery of sheet 2.
  • the roll 1 according to the invention consists of relatively "thick" sheets 2 which, while keeping a good softness, roll up perfectly to form a roll 1.
  • the roller 1 according to the invention is characterized in that the connection between said at least two individual plies 3 of each sheet 2 is made around the entire periphery of at least one sheet 2, preferably of each sheet 2.
  • connection between said at least two individual plies 3 of each sheet 2 is carried out in said peripheral zone 5 in a discontinuous manner, preferably by connection points 6 and / or by straight lines or portions of connecting lines 7 and / or by 7 'curved connecting line (s).
  • the roller 1 according to the invention is, in a particular example glued, characterized in that the glue is deposited in said peripheral zone 5 discontinuously, here by connection points 6, therefore bonding points (of form round or substantially round) distributed in said peripheral zone 5.
  • connection points 6 bonding points (of form round or substantially round) distributed in said peripheral zone 5.
  • connection points 6 for reasons of clarity, only part of the bonding or bonding points 6 has been shown in the figure 2 , the other connection or bonding points 6 being suggested by dotted lines.
  • the existence of the adjacent sheets 2 to the left and to the right of the sheet 2 shown in the figure 2 was only suggested by drawing the general outline without representing the details of these sheets 2 which are identical to that shown in detail in the center of the figure 2 .
  • connection points 6 are located on at least one portion of connection line 7 originating from one or more of the four corners of at least one sheet 2, preferably of each sheet 2, and directed towards the inside or the edge adjacent to said corner of said one or more sheets 2.
  • the straight line portion (s) 7 are not parallel to the sides defining the length and / or the width of a sheet 2, preferably of each sheet 2.
  • the roller 1 according to the invention is further characterized in that the connection points 6 are located on at least one curved connection line 7 ′ in an arc of a circle whose two ends are located on the same edge d 'one or each sheet 2 and whose concavity is directed towards the inside of said one or more sheets 2.
  • Such curved connecting lines 7' have also been suggested on the figure 2 .
  • the spacing between the adjacent connection points 6 of the same portion of straight connection line 7 or curve 7 ' is not uniform, this on at least one sheet 2, preferably on each sheet 2.
  • connection line 7 can vary and, as shown, for example decrease as we get closer to the center of the sheet 2.
  • connection points 6 is uniform on at least one sheet 2, preferably on each sheet 2.
  • the roller 1 according to the invention is characterized in that at least one sheet 2, preferably each sheet 2, present in its central zone 8 not forming part of the peripheral zone 5, at least one motif 9 produced by embossing and / or dry marking.
  • the pattern or patterns 9 are produced in the form of line (s) and / or point (s) of patterns 9 '.
  • the pattern (s) 9 are produced in the form of at least one closed surface homogeneously embossed at the rate of an overall density of pattern stitches 9 ′ in the form of protrusions due to the embossing comprised between 20 protrusions / cm 2 and 100 protuberances / cm 2 , preferably between 60 protuberances / cm 2 and 100 protuberances / cm 2 , the diameter of the circular section vertices of the protuberances being between 0.1 mm and 1.5 mm, preferably between 0.3 mm and 0.6 mm.
  • motif 9 is a specific square geometric shape or an embossed oval with classic round protuberances.
  • the roller 1 according to the invention is characterized in that at least one sheet 2, preferably each sheet 2, has a single and unique pattern 9 entirely included in the surface not belonging to the zone device 5 of sheet 2 or of each sheet 2.
  • a pattern 9 preferably centered on the sheet 2, is cut by a lateral edge or an edge defined by a pre-cut line 4.
  • pre-cutting line 4 also includes non-rectilinear borders (for example waves) even if straight pre-cutting lines 4 are widely preferred. These lines are classic and formed by all techniques known and usually used by those skilled in the art, for example by stamping or cutting with suitable blades in an ad hoc device at the winding head where the rollers are formed. Pre-cutting can be done using dotted (round) perforations or dashes (segments).
  • the pattern (s) 9 comprise one or more numbers and / or one or more letters.
  • the total number of different types of patterns 9 present on the same complete roll 1 is an integer between 1 and 25, preferably between 1 and 6. In this way, it is possible to provide several different types of patterns 9 simultaneously present on the same roll 1, always at the rate of one pattern per sheet 2.
  • the present invention is also characterized in that said roller 1 comprises at least one sheet 2 having in its central zone 8, not being part of the peripheral zone 5, no pattern 9 produced by embossing and / or dry marking.
  • said roller 1 comprises at least one sheet 2 having in its central zone 8, not being part of the peripheral zone 5, no pattern 9 produced by embossing and / or dry marking.
  • One can thus leave one or more blank sheets 2 at their central zones 8, which further increases the number of combinations of products obtainable.
  • the sheets 2 having a pattern 9 alternate with sheets 2 having no pattern 9.
  • the alternation consists of the succession of a sheet 2 provided with a pattern 9 with exactly one sheet 2 not provided with a pattern 9, etc.
  • any conventional installation known in the paper industry can be used.
  • two main plies 3 of cellulose wadding, one and / or the other possibly being plywood laminates, coming from their Respective reels are guided to pass around two rubber cylinders and then between them and two embossing steel cylinders provided with appropriate reliefs.
  • These reliefs can, for example, be distributed according to the patterns visible to the Figures 1 and 2 .
  • One of the two aforementioned plies 3 is glued by means of a rubber gluing cylinder (or applicator cylinder) which has a raised part whose design corresponds to that of the peripheral zone 5 of gluing the sheets 2 of so that the adhesive entrained by the applicator cylinder is distributed according to this pattern.
  • One or both sheets 2 can be embossed over their entire surface.
  • Gluing is only carried out on the peripheral zone 5 corresponding to the raised part of the gluing cylinder.
  • one of the two or the two cylinders are provided with reliefs, along a peripheral zone 5 of the format of the desired roll product. We can then use a smooth gluing cylinder.
  • the two main folds 3 are assembled in the nip gap formed between the embossing rolls which rotate at equal speeds and in opposite directions.
  • a single or multiple fold 3 is embossed between a rubber cylinder and a suitably engraved steel cylinder, that is to say with reliefs along the periphery of the desired product format.
  • the adhesive is deposited on the tops of the reliefs.
  • a second, respectively third fold 3 is applied to fold 3 by means of a third rubber cylinder of the matchmaker type.
  • the second and third folds 3 can also be embossed before they are combined. This third cylinder thus ensures the association of the second, respectively of the third fold 3 with the first.
  • the third cylinder one can also use a steel cylinder.
  • the multiply sheet 2 thus obtained from the manufacturing device is driven towards a winding head where it is optionally cut to the desired format and where the pre-cutting lines 4 are formed at regular intervals in the strip of sheets 2 by an appropriate device for blades before winding the product in the form of a roll 1.
  • Tests were carried out to verify the technical efficiency of the invention compared to another roll product given by way of comparative example.
  • a first product A in roll of which a detached sheet 2 has been schematically shown in the figure 3 consists of six plies of pure cellulose wadding each weighing 18.7 g / m 2 .
  • This product A was obtained by combining said plies 3 by embossing / gluing with Forbo SWFT L998 / 4 glue according to the pattern shown in the figure 3 where the embossing / bonding is carried out by the connection points 6, namely, bonding in the form of large protrusions 6 and distributed over a large part of the sheet 2 and mainly in the central zone 8 of the latter.
  • the four simply embossed areas (without bonding), for example by a conventional micro-embossing, are located at the four corners of said sheet 2. In these areas the embossing is of the type constituting the pattern 9 on the Figures 1 and 2 , that is to say made up of pattern points 9 '. All the other sheets 2 (not shown) of the roll 1 of product A are produced in the same way.
  • embossing is of the type constituting the pattern 9 on the Figures 1 and 2 , that is to say made up of pattern stitches 9 '. All the other sheets 2 (not shown) of the roll 1 of product B are also produced in the same way.
  • the non-associated central zone 8 offered the best protection for the user. Indeed, the first folds 3 to yield are in central folds, while with the associated use area, the first folds 3 that break are those of the outside.
  • a piercing test was carried out on the two previous products A and B: The test consists in homogeneously distributing drops of ten microliters of distilled water in the central zone 8 of use and in checking whether these drops pass through the product or not.
  • product B according to the invention only 9% of the drops pass through, unlike a traditional embossing / association (product A) where 100% of the drops pass through.
  • the flexibility of the format, expressed in N, is determined by the so-called "Ring & Rod” method which consists in passing a sheet of a given surface through a hole with a diameter slightly greater than the large diameter of a frustum surrounded by the sheet. The tensile force is measured on the sheet (in N) before and during its passage through the hole (in mm). When passing through the hole, the slope of the curve changes and the value of the force is noted at the point of inflection.
  • Comparative consumer tests have been carried out between product B according to the invention and known products, for example of the brand "MOLTONEL” (registered trademark), tests according to which a marked improvement has been recognized as regards both the softness, thickness and economy.
  • the advantage that comes first is relative to the softness, then comes the thickness and then the economy of use.

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  • Health & Medical Sciences (AREA)
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  • Sanitary Thin Papers (AREA)
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Abstract

La présente invention concerne le domaine des produits en ouate de cellulose à usage sanitaire ou domestique et vise en particulier les produits en rouleaux tels que les rouleaux de papier toilette (ou papier hygiénique) et analogues.Elle a pour objet un rouleau de produit cellulosique fibreux caractérisé en ce qu'il comprend une bande enroulée de feuilles (2) d'ouate de cellulose séparées par des ligne perforées ou de pré-découpe (4), les plis (3) individuels de chaque feuille (2) étant collés sur une surface périphérique (5) comprise entre 4 % et 60 % de la surface totale de chaque feuille (2).The present invention relates to the field of cellulose wadding products for sanitary or domestic use and relates in particular to products in rolls such as rolls of toilet paper (or toilet paper) and the like. Its subject is a roll of fibrous cellulosic product characterized in that it comprises a wrapped strip of sheets (2) of cellulose wadding separated by perforated or pre-cut lines (4), the individual folds (3) of each sheet (2) being glued on a peripheral surface (5) between 4% and 60% of the total surface of each sheet (2).

Description

La présente invention concerne le domaine des produits en ouate de cellulose à usage sanitaire ou domestique et vise en particulier les produits en rouleaux tels que les rouleaux de papier toilette (ou papier hygiénique) et analogues.The present invention relates to the field of cellulose wadding products for sanitary or domestic use and relates in particular to products in rolls such as rolls of toilet paper (or toilet paper) and the like.

Elle a pour objet un rouleau composé d'articles à base d'un (ou essentiellement réalisés en un) produit cellulosique fibreux. Plus particulièrement et selon un mode de réalisation préférentiel, elle a pour objet un rouleau dont certaines feuilles, et encore plus préférentiellement dont chaque feuille qui le compose, présente un seul motif unique entièrement compris dans le format de ladite ou desdites feuilles, c'est-à-dire qui ne soit pas coupé par l'un ou plusieurs des quatre bords qui délimitent la feuille (généralement de forme ou surface rectangulaire).It relates to a roll composed of articles based on a (or essentially made of) a fibrous cellulosic product. More particularly and according to a preferred embodiment, it relates to a roll of which certain sheets, and even more preferably of which each sheet which composes it, has a single unique pattern entirely included in the format of said sheet or sheets, that is that is to say which is not cut by one or more of the four edges which delimit the sheet (generally of rectangular shape or surface).

On connaît déjà, d'une façon générale, des produits du type susvisé conditionnés sous la forme de rouleaux. Dans ces rouleaux, les feuilles de produit à distribuer sont habituellement enroulées sur un mandrin central de section cylindrique en carton ou similaire. Dans le domaine concerné, lesdites feuilles enroulées intéressant l'usager sont classiquement réalisées à partir de produits cellulosiques fibreux en (ou majoritairement en) ouate de cellulose et assemblées sous la forme d'un ou de plusieurs plis liés superposés (produits stratifiés ou du type « sandwich ») qui se suivent à la queue leu leu sur le rouleau, lesdites feuilles étant séparées entre elles, dans le sens perpendiculaire au sens de déroulement des feuilles par des lignes perforées ou de pré-découpe permettant d'arracher ou de détacher une ou plusieurs feuilles du rouleau.Already known, in general, products of the above type packaged in the form of rolls. In these rolls, the sheets of product to be dispensed are usually wound on a central mandrel of cylindrical section of cardboard or the like. In the field concerned, said rolled sheets of interest to the user are conventionally produced from fibrous cellulosic products made of (or mainly) cellulose wadding and assembled in the form of one or more superimposed linked plies (laminated products or of the type "Sandwich") which follow each other in line with the tail on the roller, the said sheets being separated from each other, in the direction perpendicular to the direction of unwinding of the sheets by perforated or pre-cut lines making it possible to tear off or detach a or more sheets of the roll.

Dans le cas de rouleaux de feuilles multiplis, les différents plis de même taille superposés sont, selon l'usage destiné de la feuille et/ou les exigences imposées par les désirs du consommateur et/ou les contraintes de techniques de production, plus ou moins fortement liés entre eux en utilisant différentes techniques d'assemblage desdits plis.In the case of rolls of multi-ply sheets, the different superimposed folds of the same size are, depending on the intended use of the sheet and / or the requirements imposed by the wishes of the consumer and / or the constraints of production techniques, more or less strongly linked together using different joining techniques of said plies.

Le plus souvent, l'association des plis dans un produit multipli essentiellement en ouate de cellulose est réalisée par l'application d'une colle entre lesdits plis. Ledit 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. Cette association par collage peut être combinée à un autre type, tout aussi classique, d'association de plis qui est purement mécanique et qui consiste à déformer localement, par écrasement, les plis à lier afin que ces derniers, imbriqués les uns dans les autres sous la pression d'un cylindre, soient retenus ensemble une fois l'opération d'association terminée.Most often, the association of the plies in a multiply product essentially of cellulose wadding is carried out by applying an adhesive between said plies. Said bonding is carried out by means of any adhesive product generally used in the field of sanitary and household papers for associating folds together such as, for example, an alcohol. polyvinyl in solution in an aqueous medium. This association by gluing can be combined with another type, just as classic, of association of folds which is purely mechanical and which consists in locally deforming, by crushing, the folds to be bound so that the latter, nested one inside the other under the pressure of a cylinder, are held together once the association operation is completed.

Dans le cas du collage, la colle était jusqu'à présent déposée de façon uniforme sur toute la surface des plis du produit enroulé. Or la dépose de la colle étant associée au motif de gaufrage, cela nécessite un motif de gaufrage qui couvre toute la surface du produit.In the case of bonding, the adhesive has hitherto been deposited uniformly over the entire surface of the folds of the wound product. However, the removal of the glue being associated with the embossing pattern, this requires an embossing pattern which covers the entire surface of the product.

Les motifs actuellement utilisés sont donc de taille relativement petite et répétés un certain nombre de fois dans le sens marche et sens travers de chaque feuille, habituellement avec au moins deux motifs similaires ou identiques par feuille de papier, par exemple de papier toilette.The patterns currently used are therefore relatively small in size and repeated a number of times in the forward and cross direction of each sheet, usually with at least two similar or identical patterns per sheet of paper, for example toilet paper.

Ceci crée une succession continue de motifs gaufrés tout le long des feuilles qui se suivent lorsque l'on déroule le produit du rouleau, lesdits motifs étant coupés de façon plus ou moins aléatoire lorsqu'ils rencontrent l'un des bords latéraux du ruban formé par la succession des feuilles accrochées entre elles lorsqu'on les déroule dans le sens marche et lorsqu'ils rencontrent un bord transversal qui se forme dans le sens travers lorsque l'utilisateur détache une feuille du rouleau et/ou deux feuilles qui se suivent. Ceci est particulièrement critique et inesthétique lorsque les motifs sont relativement grands au niveau de leur surface par rapport aux dimensions de la feuille puisque ces coupures cassent le motif et peuvent, en raison de la forme géométrique de certains motifs, faire apparaître des zones fragilisées où les liaisons sont, en raison même de la coupure dudit motif, affaiblies par rapport à ce qui serait le cas dans un motif entier non coupé.This creates a continuous succession of embossed patterns all along the sheets which follow one another when the product is rolled out, said patterns being cut more or less randomly when they meet one of the lateral edges of the ribbon formed by the succession of sheets attached to each other when they are unrolled in the running direction and when they meet a transverse edge which is formed in the cross direction when the user detaches a sheet from the roll and / or two sheets which follow one another. This is particularly critical and unsightly when the patterns are relatively large at their surface compared to the dimensions of the sheet since these cuts break the pattern and can, due to the geometric shape of certain patterns, reveal fragile areas where the connections are, by reason of the cut of said pattern, weakened compared to what would be the case in a whole uncut pattern.

Un autre inconvénient lié au type d'association par collage susvisé consiste en une rigidification de la feuille de papier (à cause de la colle) et donc un enroulement plus difficile et plus délicat. Par ailleurs, on constate avec un traitement mécanique de type gaufrage un effet « d'envers » dû aux protubérances notamment dans la zone d'usage, c'est-à-dire dans la zone centrale de la feuille de papier et un transpercement accéléré par un liquide dudit papier par un effet dit « toile de tente » au niveau des protubérances d'association précités.Another drawback linked to the type of association by gluing mentioned above consists in a stiffening of the paper sheet (because of the glue) and therefore a more difficult and more delicate winding. Furthermore, with an embossing type mechanical treatment, there is a “reverse” effect due to the protuberances in particular in the area of use, that is to say in the central area of the sheet of paper and accelerated piercing. by a liquid from said paper by a so-called “tent fabric” effect at the aforementioned association protuberances.

Enfin, la résistance au niveau des motifs de gaufrage est affaiblie dans la zone d'usage en raison notamment de la destruction des fibres.Finally, the resistance at the level of the embossing patterns is weakened in the area of use due in particular to the destruction of the fibers.

Ces inconvénients sont particulièrement importants lorsque le papier enroulé est du papier toilette ou similaire dont les principales qualités recherchées sont avant tout la souplesse, la douceur, la résistance au déchirement (en particulier à l'état mouillé) et l'aspect esthétique.These drawbacks are particularly important when the rolled up paper is toilet paper or the like, the main qualities of which are above all flexibility, softness, resistance to tearing (in particular when wet) and aesthetic appearance.

Il existe donc un réel besoin de pouvoir proposer au consommateur un rouleau de papier de ce type qui allie à la fois une esthétique présentable, de préférence originale et modifiable à volonté à des propriétés de résistance, de souplesse et de douceur au moins équivalentes à celles des produits enroulés connus où les motifs se répètent à des fréquences pouvant être très élevées et qui sont coupés au niveau des bords des feuilles à l'état enroulé ou détaché dudit rouleau.There is therefore a real need to be able to offer the consumer a roll of paper of this type which combines both a presentable aesthetic, preferably original and modifiable at will with resistance, flexibility and softness properties at least equivalent to those known wound products in which the patterns are repeated at frequencies which can be very high and which are cut at the edges of the sheets in the wound or detached state from said roll.

La présente invention a pour but de pallier au moins certains de ces inconvénients.The present invention aims to overcome at least some of these drawbacks.

Elle propose à cet effet un nouveau schéma d'association qui reprend, dans un produit conditionné en rouleau, la configuration standard avec une nouvelle disposition des points de collage et d'association.To this end, it offers a new association scheme which takes up the standard configuration in a product packaged in a roll with a new arrangement of bonding and association points.

En effet, pour obtenir une zone d'usage la plus confortable et performante possible pour l'usager, lesdits points d'association ont été déplacés vers la périphérie du produit, c'est-à-dire de la feuille et de préférence de chaque feuille présente sur ledit rouleau. On crée alors, par feuille, deux zones différentes : une zone dite « technique » ou périphérique partant des bords dans le sens marche et/ou travers et allant vers l'intérieur de la feuille et une zone dite « d'usage » située au niveau du centre de l'unité de produit (une feuille).In fact, in order to obtain the most comfortable and efficient use area for the user, said association points have been moved towards the periphery of the product, that is to say of the sheet and preferably of each sheet present on said roller. We then create, per sheet, two different areas: a so-called “technical” or peripheral area starting from the edges in the direction of travel and / or cross and going towards the inside of the sheet and a so-called “use” area located at the level of the center of the product unit (one sheet).

Ladite zone technique, qui peut regrouper plusieurs portions de zones disjointes (qui partent également d'un ou de plusieurs bords vers le centre de la feuille) sert principalement à assurer l'association des plis et confère une certaine rigidité périphérique souhaitée, en particulier par le consommateur lui-même. La surface de la zone technique varie donc entre une limite inférieure correspondant à une résistance suffisante à la délamination et une limite supérieure où le produit deviendrait trop rigide.Said technical zone, which can group together several portions of disjoint zones (which also leave from one or more edges towards the center of the sheet) serves mainly to ensure the association of the plies and gives a certain desired peripheral rigidity, in particular by the consumer himself. The surface of the technical area therefore varies between a lower limit corresponding to sufficient resistance to delamination and an upper limit where the product would become too rigid.

Ladite zone d'usage qui peut également regrouper plusieurs portions de zones disjointes (au niveau ou à proximité du centre de la feuille) sert principalement à conférer de la douceur, de l'épaisseur, de la souplesse, un effet barrière (diffusion) et/ou de résistance (par exemple au transpercement).Said usage zone which can also group together several portions of disjoint zones (at or near the center of the sheet) is used mainly to impart softness, thickness, flexibility, a barrier effect (diffusion) and / or resistance (for example to piercing).

L'ensemble des surfaces des deux zones précitées ou la réunion des surfaces de toutes les zones partielles techniques et d'usage qui sont complémentaires forme la surface totale de la feuille unitaire dont la succession est enroulée.The combination of the surfaces of the two aforementioned zones or the combination of the surfaces of all the technical and use partial zones which are complementary forms the total surface of the unitary sheet, the succession of which is wound.

La présente invention a donc pour objet un rouleau de feuilles à base d'un produit cellulosique fibreux, tel que papier hygiénique, comprenant une bande enroulée constituée d'une succession continue de feuilles à base d'ouate de cellulose réalisées par association d'au moins deux plis individuels, chaque feuille étant retenue, avec faculté de détachement, avec la ou les deux feuilles adjacentes par une, respectivement deux lignes de pré-découpe, caractérisé en ce que lesdits au moins deux plis individuels de chaque feuille sont liés par collage ou par pression mécanique le long d'une zone périphérique de chaque feuille et en ce que la surface de ladite zone périphérique représente entre 4 % et 60 % de la surface totale de chaque feuille.The present invention therefore relates to a roll of sheets based on a fibrous cellulosic product, such as toilet paper, comprising a rolled up strip consisting of a continuous succession of sheets based on cellulose wadding produced by combining at least two individual folds, each sheet being retained, with the option of detachment, with the adjacent sheet or sheets by one or two pre-cut lines, respectively, characterized in that said at least two individual folds of each sheet are bonded or by mechanical pressure along a peripheral zone of each sheet and in that the surface of said peripheral zone represents between 4% and 60% of the total surface of each sheet.

Selon un mode de réalisation particulièrement préféré, l'invention a également pour objet un rouleau caractérisé en ce qu'au moins une feuille, de préférence chaque feuille, présente dans sa zone centrale ne faisant pas partie de la zone périphérique, au moins un motif réalisé par gaufrage et/ou marquage à sec.According to a particularly preferred embodiment, the invention also relates to a roller characterized in that at least one sheet, preferably each sheet, present in its central zone not forming part of the peripheral zone, at least one pattern produced by embossing and / or dry marking.

L'invention sera mieux comprise, grâce à la description ci-après, qui se rapporte à des modes de réalisation préférés, donnés à titre d'exemples non limitatifs, et expliqués avec référence aux dessins schématiques annexés, dans lesquels :

  • la figure 1 représente, de façon schématique, un premier exemple de rouleau de feuilles selon l'invention ;
  • la figure 2 représente, de façon schématique, une vue agrandie montrant de manière plus précise, et vu de dessus, un extrait d'un second exemple de rouleau de feuilles selon l'invention ;
  • la figure 3 représente, de façon schématique une vue agrandie, et vu de dessus, d'une feuille multipli d'un produit A non conforme à l'invention et donné à titre d'exemple comparatif ; et
  • la figure 4 représente, de façon schématique une vue agrandie, et vu de dessus, d'une feuille multipli d'un produit B selon l'invention.
The invention will be better understood from the following description, which relates to preferred embodiments, given by way of nonlimiting examples, and explained with reference to the appended schematic drawings, in which:
  • the figure 1 shows schematically a first example of a roll of sheets according to the invention;
  • the figure 2 shows, schematically, an enlarged view showing more precisely, and seen from above, an extract from a second example of a roll of sheets according to the invention;
  • the figure 3 shows schematically an enlarged view, and seen from above, of a multi-ply sheet of a product A not in accordance with the invention and given by way of comparative example; and
  • the figure 4 shows schematically an enlarged view, and seen from above, of a multi-ply sheet of a product B according to the invention.

En se référant aux figures 1 et 2, la présente invention a donc pour objet un rouleau 1 de feuilles 2 à base d'un produit cellulosique fibreux, tel que papier hygiénique, comprenant une bande enroulée constituée d'une succession continue de feuilles 2 à base d'ouate de cellulose réalisées par association d'au moins deux plis 3 individuels, chaque feuille 2 étant retenue, avec faculté de détachement, avec la ou les deux feuilles 2 adjacentes par une, respectivement deux lignes de pré-découpe 4, caractérisé en ce que lesdits au moins deux plis 3 individuels de chaque feuille 2 sont liés par collage ou par pression mécanique le long d'une zone périphérique 5 de chaque feuille 2 et en ce que la surface de ladite zone périphérique 5 représente entre 4 % et 60 % de la surface totale de chaque feuille 2.Referring to Figures 1 and 2 , the present invention therefore relates to a roll 1 of sheets 2 based on a fibrous cellulosic product, such as toilet paper, comprising a rolled up strip consisting of a continuous succession of sheets 2 based on cellulose wadding produced by association of at least two individual folds 3, each sheet 2 being retained, with the option of detachment, with the adjacent sheet or sheets 2 by one, respectively two pre-cut lines 4, characterized in that said at least two folds 3 individuals of each sheet 2 are bonded by bonding or by mechanical pressure along a peripheral zone 5 of each sheet 2 and in that the surface of said peripheral zone 5 represents between 4% and 60% of the total surface of each sheet 2.

Selon une variante la surface précitée représente entre 50 % (exclus) et 60 % (inclus) de la surface totale de chaque feuille 2.According to a variant, the aforementioned surface represents between 50% (excluded) and 60% (included) of the total surface of each sheet 2.

De préférence, la liaison entre lesdits au moins deux plis 3 individuels de chaque feuille 2 est réalisée par collage.Preferably, the connection between said at least two individual plies 3 of each sheet 2 is carried out by gluing.

Une feuille 2 est constituée d'au moins deux plis 3 individuels superposés, généralement de même taille et de même forme rectangulaire, voire carrée, dont les dimensions standards varient habituellement entre 90 mm et 140 mm pour la longueur (donc dans le sens marche SM, c'est-à-dire parallèlement au sens de défilement du produit enroulé) et entre 80 mm et 110 mm pour la largeur (donc dans le sens travers ST, c'est-à-dire perpendiculairement au sens de défilement du produit enroulé). Afin de garantir une cohésion suffisante de la feuille 2 et d'éviter toute délamination de cette dernière on pourra avantageusement prévoir une liaison des plis 3 telle que la résistance à la délamination entre chaque pli 3 individuel est d'au moins 1 g/cm.A sheet 2 is made up of at least two individual folds 3 superimposed, generally of the same size and of the same rectangular or even square shape, the standard dimensions of which usually vary between 90 mm and 140 mm for the length (therefore in the running direction SM , that is to say parallel to the direction of travel of the wound product) and between 80 mm and 110 mm for the width (therefore in the transverse direction ST, that is to say perpendicular to the direction of travel of the wound product ). In order to guarantee sufficient cohesion of the sheet 2 and to avoid any delamination of the latter, it is advantageously possible to provide a connection of the plies 3 such that the resistance to delamination between each individual ply 3 is at least 1 g / cm.

Pour plus de clarté, les différents plis 3 individuels superposés n'ont pas été représentés sur les figures annexées. On admet dans le cadre de la présente invention que l'exemple représenté comporte cinq plis superposés rectangulaires de même taille (14 cm x 11 cm), le pli 3 représenté aux figures annexées étant celui situé sur la face externe (visible par l'utilisateur) du rouleau 1 selon l'invention.For clarity, the different individual folds 3 superimposed have not been shown in the accompanying figures. It is accepted in the context of the present invention that the example shown comprises five superimposed rectangular folds of the same size (14 cm x 11 cm), fold 3 shown in the appended figures being that located on the external face (visible by the user ) of the roller 1 according to the invention.

Les autres plis (non représentés) peuvent être des plis simples pourvus sur toute leur face d'un micro-gaufrage régulier continu et uniforme constitué de protubérances standards à raison d'une densité d'au moins 20 protubérances/cm2, de préférence à raison d'une densité comprise entre 30 et 100 protubérances/cm2. Les plis 3, par exemple au nombre de six, peuvent être liés entre eux grâce à un collage périphérique, par exemple un collage obtenu en appliquant de la colle sur un gaufrage classique constitué de protubérances dont les sommets sont de forme circulaire d'un diamètre compris entre 0,1 mm et 1,5 mm, préférentiellement entre 0,6 mm et 1,1 mm répartis de façon homogène selon une densité de protubérances comprise entre 5 protubérances/cm2 et 80 protubérances/cm2, préférentiellement entre 5 protubérances/cm2 et 30 protubérances/cm2.The other folds (not shown) may be simple folds provided on their entire face with a regular continuous and uniform micro-embossing consisting of standard protuberances at a density of at least 20 protuberances / cm 2 , preferably at due to density included between 30 and 100 protuberances / cm 2 . The folds 3, for example six in number, can be linked together thanks to a peripheral bonding, for example a bonding obtained by applying glue to a conventional embossing consisting of protrusions whose vertices are of circular shape with a diameter between 0.1 mm and 1.5 mm, preferably between 0.6 mm and 1.1 mm evenly distributed according to a density of protuberances between 5 protuberances / cm 2 and 80 protuberances / cm 2 , preferably between 5 protuberances / cm 2 and 30 protrusions / cm 2 .

Alternativement, le collage peut être réalisé en appliquant une colle sur un motif de gaufrage quelconque mais situé dans la zone périphérique 5, comme par exemple celui résultant du gaufrage particulier représenté plus en détail à la figure 2 pour un autre exemple de rouleau 1 selon l'invention. Un mode de liage préféré est celui décrit dans le brevet français publié sous le n° FR-A-2 653 793 qui permet d'assurer un dépôt de colle uniforme dans la zone de liaison sans rigidifier la feuille.Alternatively, bonding can be carried out by applying an adhesive to any embossing pattern but located in the peripheral zone 5, such as that resulting from the particular embossing shown in more detail in the figure 2 for another example of roller 1 according to the invention. A preferred mode of binding is that described in the French patent published under the number FR-A-2 653 793 which ensures a uniform glue deposit in the bonding area without stiffening the sheet.

Sans sortir du cadre de la présente invention, la liaison entre lesdits au moins deux plis 3 individuels de chaque feuille 2 peut être réalisée par toute liaison mécanique connue de l'homme du métier permettant d'associer de façon purement physique au moins deux plis 3 entre eux, par exemple par pression mécanique, gaufrage, moletage, etc.Without departing from the scope of the present invention, the connection between said at least two individual plies 3 of each sheet 2 can be carried out by any mechanical connection known to those skilled in the art making it possible to associate, in a purely physical manner, at least two plies 3 between them, for example by mechanical pressure, embossing, knurling, etc.

Le nombre de plis 3 individuels formant chaque feuille 2 peut être compris entre deux et dix et de préférence compris entre quatre et sept plis 3 individuels.The number of individual plies 3 forming each sheet 2 can be between two and ten and preferably between four and seven individual plies 3.

Les plis 3 sont normalement réalisés en ouate de cellulose (pure ou majoritaire) d'un grammage compris entre 10 g/m2 et 50 g/m2 et peuvent comprendre les additifs classiquement employés dans ce domaine dans la mesure où ces derniers n'interfèrent pas de manière critique avec les autres caractéristiques techniques de l'invention. Les grammages et la nature des plis 3 peuvent varier d'un pli 3 à l'autre mais sont préférentiellement les mêmes ou sensiblement les mêmes pour tous les plis 3 ou pour une grande partie des plis 3. Le grammage de chaque feuille 2 est compris entre 30 g/m2 et 150 g/m2, de préférence compris entre 85 g/m2 et 115 g/m2.The folds 3 are normally made of cellulose wadding (pure or majority) with a grammage of between 10 g / m 2 and 50 g / m 2 and may include the additives conventionally used in this field insofar as the latter do not not critically interfere with the other technical features of the invention. The grammages and the nature of the plies 3 can vary from one ply 3 to another but are preferably the same or substantially the same for all the plies 3 or for a large part of the plies 3. The grammage of each sheet 2 is understood between 30 g / m 2 and 150 g / m 2 , preferably between 85 g / m 2 and 115 g / m 2 .

Selon un premier aspect de l'invention, le rouleau 1 selon l'invention est caractérisé en ce que la totalité des surfaces de liaison entre lesdits plis 3 d'au moins une feuille 2, de préférence de chaque feuille 2 est inférieure à la surface couverte par ladite zone périphérique 5. De façon particulièrement préférée, la surface de liaison entre lesdits plis 3 d'au moins une feuille 2, de préférence de chaque feuille 2, est comprise entre 1 % et 50 %, de préférence entre 3 % et 7 % de la surface totale couverte par ladite zone périphérique 5.According to a first aspect of the invention, the roller 1 according to the invention is characterized in that the totality of the connecting surfaces between said plies 3 of at least one sheet 2, preferably of each sheet 2, is less than the surface covered by said peripheral zone 5. In a particularly preferred manner, the connection surface between said plies 3 at least at least one sheet 2, preferably of each sheet 2, is between 1% and 50%, preferably between 3% and 7% of the total surface covered by said peripheral zone 5.

Ainsi, on évite de trop rigidifier la feuille 2, et de façon nouvelle et inattendue on obtient un rouleau 1 formé de feuilles 2 souples.Thus, one avoids stiffening the sheet 2 too much, and in a new and unexpected way one obtains a roller 1 formed of flexible sheets 2.

La surface de liaison a été ajustée de manière à préserver la souplesse de la bande du rouleau 1 formée par la succession des feuilles 2 lorsque celles-ci sont encore accrochées les unes aux autres afin notamment d'assurer un bon enroulement desdites feuilles 2 tout en gardant une bonne résistance à la délamination de ces dernières.The connecting surface has been adjusted so as to preserve the flexibility of the strip of the roll 1 formed by the succession of the sheets 2 when these are still attached to each other in order in particular to ensure a good winding of the said sheets 2 while keeping good resistance to delamination of the latter.

Par zone périphérique 5, on entend la zone partant d'un ou de plusieurs bords, voire de tous les quatre bords ou extrémités de la surface définissant la feuille 2 (en l'incluant ou les incluant) et s'étendant en direction du centre de ladite feuille 2. On évite ainsi tout bâillement des plis 3 ou la formation de pliures qui nuisent à l'aspect du produit. Un exemple de géométrie simple de cette zone périphérique 5 est une bande rectiligne continue d'épaisseur constante faisant tout le tour de ladite feuille 2 rectangulaire. Bien entendu, la forme de ladite zone périphérique 5 peut être irrégulière et/ou discontinue et/ou curviligne, etc., du moment qu'elle puisse définir une surface dans laquelle l'association entre les plis 3 à lier a lieu et qu'elle se situe à la périphérie de la feuille 2.By peripheral zone 5 is meant the zone starting from one or more edges, or even from all four edges or ends of the surface defining the sheet 2 (by including or including them) and extending in the direction of the center. of said sheet 2. This avoids any yawning of the folds 3 or the formation of folds which harm the appearance of the product. An example of a simple geometry of this peripheral zone 5 is a continuous rectilinear strip of constant thickness going all around said rectangular sheet 2. Of course, the shape of said peripheral zone 5 can be irregular and / or discontinuous and / or curvilinear, etc., as long as it can define a surface in which the association between the plies 3 to be bonded takes place and that it is located on the periphery of sheet 2.

De façon tout à fait avantageuse, le rouleau 1 selon l'invention est constitué de feuilles 2 relativement "épaisses" qui, tout en gardant une bonne douceur, s'enroulent parfaitement pour former un rouleau 1.In an entirely advantageous manner, the roll 1 according to the invention consists of relatively "thick" sheets 2 which, while keeping a good softness, roll up perfectly to form a roll 1.

Selon un mode préféré, le rouleau 1 selon l'invention est caractérisé en ce que la liaison entre lesdits au moins deux plis 3 individuels de chaque feuille 2 est réalisée sur tout le pourtour d'au moins une feuille 2, de préférence de chaque feuille 2.According to a preferred embodiment, the roller 1 according to the invention is characterized in that the connection between said at least two individual plies 3 of each sheet 2 is made around the entire periphery of at least one sheet 2, preferably of each sheet 2.

Avantageusement, la liaison entre lesdits au moins deux plis 3 individuels de chaque feuille 2 est réalisée dans ladite zone périphérique 5 de manière discontinue, de préférence par points de liaison 6 et/ou par droites ou portions de droites de liaison 7 et/ou par ligne(s) de liaison courbe(s) 7'.Advantageously, the connection between said at least two individual plies 3 of each sheet 2 is carried out in said peripheral zone 5 in a discontinuous manner, preferably by connection points 6 and / or by straight lines or portions of connecting lines 7 and / or by 7 'curved connecting line (s).

Comme on l'a représenté sur les figures 1 et 2, le rouleau 1 selon l'invention est, dans un exemple particulier collé, caractérisé en ce que la colle est déposée dans ladite zone périphérique 5 de façon discontinue, ici par points de liaison 6, donc points de collage (de forme ronde ou sensiblement ronde) répartis dans ladite zone périphérique 5. Pour des raisons de clarté seulement une partie des points de liaison ou de collage 6 a été représentée à la figure 2, les autres points de liaison ou de collage 6 étant suggérés par des pointillés. Egalement pour des raisons de clarté, l'existence des feuilles 2 voisines à gauche et à droite de la feuille 2 représentée à la figure 2 n'a été suggérée que par le dessin du contour général sans représenter les détails de ces feuilles 2 qui sont identiques à celle représentée de façon détaillée au centre de la figure 2.As shown in the Figures 1 and 2 , the roller 1 according to the invention is, in a particular example glued, characterized in that the glue is deposited in said peripheral zone 5 discontinuously, here by connection points 6, therefore bonding points (of form round or substantially round) distributed in said peripheral zone 5. For reasons of clarity, only part of the bonding or bonding points 6 has been shown in the figure 2 , the other connection or bonding points 6 being suggested by dotted lines. Also for reasons of clarity, the existence of the adjacent sheets 2 to the left and to the right of the sheet 2 shown in the figure 2 was only suggested by drawing the general outline without representing the details of these sheets 2 which are identical to that shown in detail in the center of the figure 2 .

De manière avantageuse, et dans le cas le plus général en ce qui concerne l'association des différents plis 3, les points de liaison 6 précités sont situés sur au moins une portion de droite de liaison 7 ayant pour origine l'un ou plusieurs des quatre coins d'au moins une feuille 2, de préférence de chaque feuille 2, et dirigée(s) vers l'intérieur ou le bord adjacent audit coin de ladite ou desdites feuilles 2.Advantageously, and in the most general case as regards the association of the different plies 3, the aforementioned connection points 6 are located on at least one portion of connection line 7 originating from one or more of the four corners of at least one sheet 2, preferably of each sheet 2, and directed towards the inside or the edge adjacent to said corner of said one or more sheets 2.

Selon un autre aspect, la ou les portions de droite de liaison 7 ne sont pas parallèles aux côtés définissant la longueur et/ou la largeur d'une feuille 2, de préférence de chaque feuille 2.According to another aspect, the straight line portion (s) 7 are not parallel to the sides defining the length and / or the width of a sheet 2, preferably of each sheet 2.

On peut ainsi dessiner des portions de lignes droites de liaison 7 évoquant des rayons de soleil qui irradient depuis un ou chacun des quatre coins de la feuille 2.It is thus possible to draw portions of straight connecting lines 7 evoking sun rays which radiate from one or each of the four corners of the sheet 2.

Selon une variante, le rouleau 1 selon l'invention est en outre caractérisé en ce que les points de liaison 6 sont situés sur au moins une ligne de liaison courbe 7' en arc de cercle dont les deux extrémités sont situées sur un même bord d'une ou de chaque feuille 2 et dont la concavité est dirigée vers l'intérieur de ladite ou desdites feuilles 2. De telles lignes de liaison courbes 7' ont également été suggérées sur la figure 2.According to a variant, the roller 1 according to the invention is further characterized in that the connection points 6 are located on at least one curved connection line 7 ′ in an arc of a circle whose two ends are located on the same edge d 'one or each sheet 2 and whose concavity is directed towards the inside of said one or more sheets 2. Such curved connecting lines 7' have also been suggested on the figure 2 .

Avantageusement, l'espacement entre les points de liaison 6 adjacents d'une même portion de ligne de liaison droite 7 ou courbe 7' n'est pas uniforme, ce sur au moins une feuille 2, de préférence sur chaque feuille 2.Advantageously, the spacing between the adjacent connection points 6 of the same portion of straight connection line 7 or curve 7 'is not uniform, this on at least one sheet 2, preferably on each sheet 2.

Comme on le voit sur la figure 2, la distance entre deux points de liaison 6 adjacents situés sur une même droite de liaison 7 peut varier et, comme représenté, par exemple se réduire à mesure que l'on se rapproche du centre de la feuille 2.As seen on the figure 2 , the distance between two adjacent connection points 6 located on the same connection line 7 can vary and, as shown, for example decrease as we get closer to the center of the sheet 2.

Ceci permet de créer des effets esthétiques et de jouer sur la densité de points de liaison 6 dans la zone périphérique 5.This makes it possible to create aesthetic effects and to play on the density of connection points 6 in the peripheral zone 5.

En effet, en diminuant la surface d'association au niveau de la zone périphérique 5 on augmente, à force de gaufrage constante, la pression appliquée localement au pli 3 et donc la pénétration de la colle dans les différents plis 3 superposés à assembler.In fact, by decreasing the area of association at the peripheral zone 5, the pressure applied locally to the ply 3 is increased, at constant embossing force, and therefore the penetration of the glue into the various plies 3 superimposed to be assembled.

Selon une variante, on peut prévoir que l'espacement des points de liaison 6 est uniforme sur au moins une feuille 2, de préférence sur chaque feuille 2.According to a variant, it can be provided that the spacing of the connection points 6 is uniform on at least one sheet 2, preferably on each sheet 2.

Selon un mode particulièrement préféré, le rouleau 1 selon l'invention est caractérisé en ce qu'au moins une feuille 2, de préférence chaque feuille 2, présente dans sa zone centrale 8 ne faisant pas partie de la zone périphérique 5, au moins un motif 9 réalisé par gaufrage et/ou marquage à sec.According to a particularly preferred embodiment, the roller 1 according to the invention is characterized in that at least one sheet 2, preferably each sheet 2, present in its central zone 8 not forming part of the peripheral zone 5, at least one motif 9 produced by embossing and / or dry marking.

Avantageusement, le ou les motifs 9 sont réalisés sous la forme de ligne(s) et/ou de point(s) de motifs 9'.Advantageously, the pattern or patterns 9 are produced in the form of line (s) and / or point (s) of patterns 9 '.

De manière préférée, le ou les motifs 9 sont réalisés sous la forme d'au moins une surface fermée gaufrée de façon homogène à raison d'une densité globale de points de motif 9' sous la forme de protubérances dues au gaufrage comprise entre 20 protubérances/cm2 et 100 protubérances/cm2, de préférence entre 60 protubérances/cm2 et 100 protubérances/cm2, le diamètre des sommets de section circulaire des protubérances étant compris entre 0,1 mm et 1,5 mm, de préférence entre 0,3 mm et 0,6 mm.Preferably, the pattern (s) 9 are produced in the form of at least one closed surface homogeneously embossed at the rate of an overall density of pattern stitches 9 ′ in the form of protrusions due to the embossing comprised between 20 protrusions / cm 2 and 100 protuberances / cm 2 , preferably between 60 protuberances / cm 2 and 100 protuberances / cm 2 , the diameter of the circular section vertices of the protuberances being between 0.1 mm and 1.5 mm, preferably between 0.3 mm and 0.6 mm.

Dans les exemples illustrés aux figures 1 et 2, le motif 9 est une forme géométrique carrée spécifique ou un ovale gaufré avec des protubérances rondes classiques.In the examples illustrated in Figures 1 and 2 , motif 9 is a specific square geometric shape or an embossed oval with classic round protuberances.

De façon la plus préférée, le rouleau 1 selon l'invention est caractérisé en ce qu'au moins une feuille 2, de préférence chaque feuille 2, comporte un seul et unique motif 9 entièrement compris dans la surface n'appartenant pas à la zone périphérique 5 de la feuille 2 ou de chaque feuille 2.Most preferably, the roller 1 according to the invention is characterized in that at least one sheet 2, preferably each sheet 2, has a single and unique pattern 9 entirely included in the surface not belonging to the zone device 5 of sheet 2 or of each sheet 2.

Contrairement aux motifs répétitifs connus, il n'y a donc aucun risque ici pour qu'un motif 9, de préférence centré sur la feuille 2, soit coupé par un bord latéral ou un bord défini par une ligne de pré-découpe 4.Unlike known repeating patterns, there is therefore no risk here that a pattern 9, preferably centered on the sheet 2, is cut by a lateral edge or an edge defined by a pre-cut line 4.

A ce propos, on remarquera que le terme de ligne de pré-découpe 4 inclut également les frontières non rectilignes (par exemple des vagues) même si des lignes de pré-découpe 4 droites sont largement préférées. Ces lignes sont classiques et formées par toutes les techniques connues et habituellement employées par l'homme du métier, par exemple par estampillage ou découpe avec des lames appropriés dans un dispositif ad hoc au niveau de la tête de bobinage où les rouleaux sont formés. La pré-découpe peut se faire selon des perforations en forme de pointillés (ronds) ou des tirets (segments).In this regard, it will be noted that the term pre-cutting line 4 also includes non-rectilinear borders (for example waves) even if straight pre-cutting lines 4 are widely preferred. These lines are classic and formed by all techniques known and usually used by those skilled in the art, for example by stamping or cutting with suitable blades in an ad hoc device at the winding head where the rollers are formed. Pre-cutting can be done using dotted (round) perforations or dashes (segments).

Selon une autre caractéristique, il existe, entre le ou les contours 10 du ou des motifs 9 et les contours 11 délimitant la zone périphérique 5, au moins une zone libre 12 ne comportant aucun gaufrage, marquage à sec ou autre signe distinctif.According to another characteristic, there exists, between the contour (s) 10 of the pattern (s) 9 and the contours 11 delimiting the peripheral zone 5, at least one free zone 12 comprising no embossing, dry marking or other distinctive sign.

On renforce ainsi le contraste entre ledit motif 9 et le reste du pli 3.This enhances the contrast between said pattern 9 and the rest of the fold 3.

Selon une variante, le ou les motifs 9 comprennent un ou plusieurs chiffres et/ou une ou plusieurs lettres.According to a variant, the pattern (s) 9 comprise one or more numbers and / or one or more letters.

On peut ainsi marquer et personnaliser le produit en rouleau avec un message quelconque, un slogan publicitaire, le nom (marque commerciale du produit) ou analogues.It is thus possible to mark and personalize the product in roll with any message, an advertising slogan, the name (trademark of the product) or the like.

De façon particulièrement intéressante, on peut prévoir que le nombre total de types de motifs 9 différents présents sur un même rouleau 1 complet soit un nombre entier compris entre 1 et 25, de préférence entre 1 et 6. De cette sorte on peut éventuellement prévoir plusieurs types de motifs 9 différents simultanément présents sur un même rouleau 1, toujours à raison d'un motif par feuille 2.In a particularly advantageous manner, it is possible to provide that the total number of different types of patterns 9 present on the same complete roll 1 is an integer between 1 and 25, preferably between 1 and 6. In this way, it is possible to provide several different types of patterns 9 simultaneously present on the same roll 1, always at the rate of one pattern per sheet 2.

La présente invention est également caractérisée en ce que ledit rouleau 1 comporte au moins une feuille 2 présentant dans sa zone centrale 8, ne faisant pas partie de la zone périphérique 5, aucun motif 9 réalisé par gaufrage et/ou marquage à sec. On peut ainsi laisser une ou plusieurs feuilles 2 vierges au niveau de leurs zones centrales 8, ce qui permet encore d'accroître le nombre de combinaisons de produits obtenables.The present invention is also characterized in that said roller 1 comprises at least one sheet 2 having in its central zone 8, not being part of the peripheral zone 5, no pattern 9 produced by embossing and / or dry marking. One can thus leave one or more blank sheets 2 at their central zones 8, which further increases the number of combinations of products obtainable.

Avantageusement, les feuilles 2 présentant un motif 9 alternent avec des feuilles 2 ne présentant pas de motif 9.Advantageously, the sheets 2 having a pattern 9 alternate with sheets 2 having no pattern 9.

De préférence, l'alternance consiste en la succession d'une feuille 2 pourvue d'un motif 9 avec exactement une feuille 2 non pourvue d'un motif 9, etc.Preferably, the alternation consists of the succession of a sheet 2 provided with a pattern 9 with exactly one sheet 2 not provided with a pattern 9, etc.

Pour réaliser un produit selon l'invention, on peut utiliser toute installation classique connue dans le domaine papetier. Dans une telle installation conventionnelle deux plis 3 principaux en ouate de cellulose, l'un et/ou l'autre pouvant être des stratifiés multiplis, venant de leurs dévidoirs respectifs sont guidés pour venir passer autour de deux cylindres en caoutchouc puis entre ceux-ci et deux cylindres gaufreurs en acier pourvus de reliefs appropriés. Ces reliefs peuvent, par exemple, être répartis selon les motifs visibles aux figures 1 et 2. L'un des deux plis 3 précités est encollé au moyen d'un cylindre d'encollage (ou cylindre applicateur) en caoutchouc qui comporte une partie en relief dont le dessin correspond à celui de la zone périphérique 5 d'encollage des feuilles 2 de façon que la colle entraînée par le cylindre applicateur soit répartie selon ce motif. On peut gaufrer une ou les deux feuilles 2 sur toute leur surface. L'encollage n'est réalisé que sur la zone périphérique 5 correspondant à la partie en relief du cylindre d'encollage. Selon un autre mode de réalisation l'un des deux ou les deux cylindres sont pourvus de reliefs, le long d'une zone périphérique 5 du format du produit en rouleau désiré. On peut alors utiliser un cylindre d'encollage lisse.To produce a product according to the invention, any conventional installation known in the paper industry can be used. In such a conventional installation, two main plies 3 of cellulose wadding, one and / or the other possibly being plywood laminates, coming from their Respective reels are guided to pass around two rubber cylinders and then between them and two embossing steel cylinders provided with appropriate reliefs. These reliefs can, for example, be distributed according to the patterns visible to the Figures 1 and 2 . One of the two aforementioned plies 3 is glued by means of a rubber gluing cylinder (or applicator cylinder) which has a raised part whose design corresponds to that of the peripheral zone 5 of gluing the sheets 2 of so that the adhesive entrained by the applicator cylinder is distributed according to this pattern. One or both sheets 2 can be embossed over their entire surface. Gluing is only carried out on the peripheral zone 5 corresponding to the raised part of the gluing cylinder. According to another embodiment, one of the two or the two cylinders are provided with reliefs, along a peripheral zone 5 of the format of the desired roll product. We can then use a smooth gluing cylinder.

Après encollage, les deux plis 3 principaux sont assemblés dans l'intervalle de pincement ménagé entre les cylindres gaufreurs qui tournent à des vitesses égales et des sens opposés.After gluing, the two main folds 3 are assembled in the nip gap formed between the embossing rolls which rotate at equal speeds and in opposite directions.

Selon une variante, on gaufre un pli 3 simple ou multiple entre un cylindre en caoutchouc et un cylindre en acier convenablement gravé, c'est-à-dire avec des reliefs selon la périphérie du format de produit souhaité. On dépose l'adhésif sur les sommets des reliefs. Enfin, on vient appliquer sur le pli 3 un second, respectivement troisième pli 3 au moyen d'un troisième cylindre en caoutchouc de type marieur. Les deuxième et troisième plis 3 peuvent également être gaufrés avant leur association. Ce troisième cylindre assure ainsi l'association du second, respectivement du troisième pli 3 avec le premier. Pour le troisième cylindre on peut également utiliser un cylindre en acier.Alternatively, a single or multiple fold 3 is embossed between a rubber cylinder and a suitably engraved steel cylinder, that is to say with reliefs along the periphery of the desired product format. The adhesive is deposited on the tops of the reliefs. Finally, a second, respectively third fold 3 is applied to fold 3 by means of a third rubber cylinder of the matchmaker type. The second and third folds 3 can also be embossed before they are combined. This third cylinder thus ensures the association of the second, respectively of the third fold 3 with the first. For the third cylinder one can also use a steel cylinder.

La feuille 2 multipli ainsi issue du dispositif de fabrication est entraînée vers une tête de bobineuse où elle est éventuellement découpée au format désiré et où les lignes de pré-découpe 4 sont formées à intervalles réguliers dans la bande de feuilles 2 par un dispositif approprié de lames avant l'enroulement du produit sous la forme du rouleau 1.The multiply sheet 2 thus obtained from the manufacturing device is driven towards a winding head where it is optionally cut to the desired format and where the pre-cutting lines 4 are formed at regular intervals in the strip of sheets 2 by an appropriate device for blades before winding the product in the form of a roll 1.

Tests :Tests:

Des tests ont été réalisés pour vérifier l'efficacité technique de l'invention par rapport à un autre produit en rouleau donné à titre d'exemple comparatif.Tests were carried out to verify the technical efficiency of the invention compared to another roll product given by way of comparative example.

Un premier produit A en rouleau dont une feuille 2 détachée a été schématiquement représentée à la figure 3 consiste en six plis en pure ouate de cellulose présentant chacun un grammage de 18,7 g/m2. Ce produit A a été obtenu en associant lesdits plis 3 par un gaufrage/collage avec de la colle Forbo SWFT L998/4 selon le motif représenté à la figure 3 où le gaufrage/collage est réalisé par les points de liaison 6, à savoir, de collage sous forme de grosses protubérances 6 et réparti sur une grande partie de la feuille 2 et principalement dans la zone centrale 8 de cette dernière. Les quatre zones simplement gaufrées (sans collage), par exemple par un micro-gaufrage classique, sont situées au niveau des quatre coins de ladite feuille 2. Dans ces zones le gaufrage est du type de celui constituant le motif 9 sur les figures 1 et 2, c'est-à-dire constitué de points de motifs 9'. Toutes les autres feuilles 2 (non représentées) du rouleau 1 de produit A sont réalisées de la même manière.A first product A in roll, of which a detached sheet 2 has been schematically shown in the figure 3 consists of six plies of pure cellulose wadding each weighing 18.7 g / m 2 . This product A was obtained by combining said plies 3 by embossing / gluing with Forbo SWFT L998 / 4 glue according to the pattern shown in the figure 3 where the embossing / bonding is carried out by the connection points 6, namely, bonding in the form of large protrusions 6 and distributed over a large part of the sheet 2 and mainly in the central zone 8 of the latter. The four simply embossed areas (without bonding), for example by a conventional micro-embossing, are located at the four corners of said sheet 2. In these areas the embossing is of the type constituting the pattern 9 on the Figures 1 and 2 , that is to say made up of pattern points 9 '. All the other sheets 2 (not shown) of the roll 1 of product A are produced in the same way.

On a comparé ce dernier avec un produit B selon l'invention constitué des mêmes plis que le produit A mais selon une association desdits plis par un gaufrage/collage selon l'invention. Les plis 3 de la feuille 2 du produit B ont été associés selon le motif représenté à la figure 4 (qui représente également une feuille 2 détachée du rouleau 1) où le gaufrage/collage est réalisé par les points de liaison 6, à savoir des points de collage sous forme de grosses protubérances 6 et réparti seulement sur la zone périphérique 5 de la feuille 2. La zone simplement gaufrée (sans collage) est située au niveau de la zone centrale 8 de ladite feuille 2. Dans cette zone unique le gaufrage est du type de celui constituant le motif 9 sur les figures 1 et 2, c'est-à-dire constitué de points de motifs 9'. Toutes les autres feuilles 2 (non représentées) du rouleau 1 de produit B sont également réalisées de la même manière.The latter was compared with a product B according to the invention made up of the same folds as product A but according to a combination of said folds by embossing / bonding according to the invention. The folds 3 of sheet 2 of product B have been combined according to the pattern shown in the figure 4 (which also represents a sheet 2 detached from the roll 1) where the embossing / bonding is carried out by the connection points 6, namely bonding points in the form of large protrusions 6 and distributed only over the peripheral zone 5 of the sheet 2 The simply embossed area (without bonding) is located at the central area 8 of said sheet 2. In this unique area the embossing is of the type constituting the pattern 9 on the Figures 1 and 2 , that is to say made up of pattern stitches 9 '. All the other sheets 2 (not shown) of the roll 1 of product B are also produced in the same way.

Les résultats des différents tests comparatifs sont donnés ci-dessous. Résistances à sec en N/m selon la norme NF EN 12625-4: Résistance SM Résistance ST Produit A 656 289 Produit B (invention) 791 310 The results of the various comparative tests are given below. <u> Dry resistors in N / m according to standard NF EN 12625-4: </u> SM resistance ST resistance Product A 656 289 Product B (invention) 791 310

A configuration de réglages et de tissu de départ identique, on note une nette amélioration de la résistance avec un gaufrage/association uniquement en périphérie du produit.With identical configuration and starting fabric configuration, there is a marked improvement in resistance with embossing / association only at the periphery of the product.

On observe 20 % d'amélioration au niveau de la résistance dans le sens marche et 7 % au niveau de la résistance dans le sens travers.There is 20% improvement in resistance in the forward direction and 7% in resistance in the cross direction.

De plus, on a constaté lors d'essais de traction que la zone centrale 8 non associée offrait la meilleure protection pour l'usager. En effet, les premiers plis 3 à céder se trouvent en plis centraux, alors qu'avec la zone d'usage associée, les premiers plis 3 qui cassent sont ceux de l'extérieur.In addition, it was found during tensile tests that the non-associated central zone 8 offered the best protection for the user. Indeed, the first folds 3 to yield are in central folds, while with the associated use area, the first folds 3 that break are those of the outside.

Effet barrière (diffusion) :Barrier effect (diffusion):

Un test de transpercement a été réalisé sur les deux produits A et B précédents:
Le test consiste à répartir de façon homogène des gouttes de dix microlitres d'eau distillée dans la zone centrale 8 d'utilisation et à vérifier si ces gouttes traversent ou non le produit.A piercing test was carried out on the two previous products A and B:
The test consists in homogeneously distributing drops of ten microliters of distilled water in the central zone 8 of use and in checking whether these drops pass through the product or not.

Avec le produit B selon l'invention seulement 9 % des gouttes traversent, contrairement à un gaufrage / association traditionnel (produit A) où 100 % des gouttes traversent.With product B according to the invention only 9% of the drops pass through, unlike a traditional embossing / association (product A) where 100% of the drops pass through.

Souplesse :Flexibility:

La souplesse du format, exprimée en N, est déterminée par la méthode dite « Ring & Rod » qui consiste à faire passer une feuille d'une surface donnée à travers un trou de diamètre légèrement supérieur au grand diamètre d'un tronc de cône entouré par la feuille. On mesure la force de traction sur la feuille (en N) avant et pendant son passage à travers le trou (en mm). Lors du passage à travers le trou, la pente de la courbe change et on relève la valeur de la force au niveau du point d'inflexion.The flexibility of the format, expressed in N, is determined by the so-called "Ring & Rod" method which consists in passing a sheet of a given surface through a hole with a diameter slightly greater than the large diameter of a frustum surrounded by the sheet. The tensile force is measured on the sheet (in N) before and during its passage through the hole (in mm). When passing through the hole, the slope of the curve changes and the value of the force is noted at the point of inflection.

On a obtenu pour les deux produits susvisés :

  • Produit A : 215 +/- 20 cN
  • Produit B (selon l'invention) : 175 +/- 15 cN
The following two products were obtained:
  • Product A: 215 +/- 20 cN
  • Product B (according to the invention): 175 +/- 15 cN

On constate donc une amélioration de l'ordre de 23 % de la souplesse par rapport à un produit connu.There is therefore an improvement of about 23% in flexibility compared to a known product.

Douceur :Softness:

  • Produit A : effet d'envers même minimeProduct A: reverse effect even minimal
  • Produit B : pas d'effet d'envers car pas de picots encolleurs traversants.Product B: no reverse effect because no through bonding pins.

Des essais consommateurs comparatifs ont été effectués entre le produit B selon l'invention et des produits connus, par exemple de la marque "MOLTONEL" (marque déposée), essais selon lesquels une nette amélioration a été reconnue en ce qui concerne à la fois la douceur, l'épaisseur et l'économie. L'avantage qui arrive en tête est relatif à la douceur, puis vient l'épaisseur et ensuite l'économie d'usage.Comparative consumer tests have been carried out between product B according to the invention and known products, for example of the brand "MOLTONEL" (registered trademark), tests according to which a marked improvement has been recognized as regards both the softness, thickness and economy. The advantage that comes first is relative to the softness, then comes the thickness and then the economy of use.

C'est bien la simultanéité et la synergie de ces trois caractéristiques qui confèrent à l'invention à la fois sa nouveauté et son inventivité.It is the simultaneity and synergy of these three characteristics that give the invention both its novelty and its inventiveness.

Bien entendu, l'invention n'est pas limitée aux modes de réalisation décrits et représentés aux dessins annexés. Des modifications restent possibles, notamment du point de vue de la constitution des divers éléments ou par substitution d'équivalents techniques, sans sortir pour autant du domaine de protection de l'invention.Of course, the invention is not limited to the embodiments described and shown in the accompanying drawings. Modifications remain possible, in particular from the point of view of the constitution of the various elements or by substitution of technical equivalents, without thereby departing from the scope of protection of the invention.

Claims (14)

Rouleau (1) de feuilles (2) à base d'un produit cellulosique fibreux, tel que papier hygiénique, comprenant une bande enroulée constituée d'une succession continue de feuilles (2) à base d'ouate de cellulose réalisées par association d'au moins deux plis (3) individuels, chaque feuille (2) étant retenue, avec faculté de détachement, avec la ou les deux feuilles (2) adjacentes par une, respectivement deux lignes de pré-découpe (4), lesdits au moins deux plis (3) individuels de chaque feuille (2) étant liés par collage ou par pression mécanique le long d'une zone périphérique (5) de chaque feuille (2) et la surface de ladite zone périphérique (5) représentant entre 4 % et 60 % de la surface totale de chaque feuille (2), caractérisé en ce que la liaison entre lesdits au moins deux plis (3) individuels de chaque feuille (2) est réalisée sur tout le pourtour d'au moins une feuille (2), de préférence de chaque feuille (2).Roll (1) of sheets (2) based on a fibrous cellulosic product, such as toilet paper, comprising a rolled up strip made up of a continuous succession of sheets (2) based on cellulose wadding produced by combining at least two individual folds (3), each sheet (2) being retained, with the option of detachment, with the one or two sheets (2) adjacent by one, respectively two pre-cutting lines (4), said at least two individual plies (3) of each sheet (2) being bonded by bonding or by mechanical pressure along a peripheral zone (5) of each sheet (2) and the surface of said peripheral zone (5) representing between 4% and 60% of the total area of each sheet (2), characterized in that the connection between said at least two individual folds (3) of each sheet (2) is carried out around the entire periphery of at least one sheet (2) , preferably from each sheet (2). Rouleau (1) selon la revendication 1, caractérisé en ce que la totalité des surfaces de liaison entre lesdits plis (3) d'au moins une feuille (2), de préférence de chaque feuille (2) est inférieure à la surface couverte par ladite zone périphérique (5).Roll (1) according to claim 1, characterized in that the totality of the connecting surfaces between said folds (3) of at least one sheet (2), preferably of each sheet (2), is less than the area covered by said peripheral zone (5). Rouleau (1) selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que la liaison entre lesdits au moins deux plis (3) individuels de chaque feuille (2) est réalisée dans ladite zone périphérique (5) de manière discontinue, de préférence par points de liaison (6) et/ou par droites ou portions de droites de liaison (7) et/ou par ligne(s) de liaison courbe(s) (7').Roll (1) according to any one of claims 1 or 2, characterized in that the connection between said at least two individual plies (3) of each sheet (2) is carried out in said peripheral zone (5) discontinuously, preferably by connecting points (6) and / or by straight lines or portions of connecting lines (7) and / or by curved connecting line (s) (7 '). Rouleau (1) selon l'une des revendications précédentes, caractérisé en ce qu'au moins une feuille (2), de préférence chaque feuille (2), présente dans sa zone centrale (8) ne faisant pas partie de la zone périphérique (5), au moins un motif (9) réalisé par gaufrage et/ou marquage à sec.Roll (1) according to one of the preceding claims, characterized in that at least one sheet (2), preferably each sheet (2), present in its central area (8) not forming part of the peripheral area ( 5), at least one pattern (9) produced by embossing and / or dry marking. Rouleau (1) selon la revendication 4, caractérisé en ce que le ou les motifs (9) sont réalisés sous la forme de ligne(s) et/ou de point(s) de motifs (9').Roller (1) according to claim 4, characterized in that the pattern (s) (9) are produced in the form of line (s) and / or point (s) of patterns (9 '). Rouleau (1) selon l'une quelconque des revendications 4 ou 5, caractérisé en ce qu'au moins une feuille (2), de préférence chaque feuille (2), comporte un seul et unique motif (9) entièrement compris dans la surface n'appartenant pas à la zone périphérique (5) de la feuille (2) ou de chaque feuille (2).Roll (1) according to any one of claims 4 or 5, characterized in that at least one sheet (2), preferably each sheet (2), comprises a single and unique pattern (9) entirely included in the surface not belonging to the peripheral zone (5) of the sheet (2) or of each sheet (2). Rouleau (1) selon l'une quelconque des revendications 4 à 6, caractérisé en ce qu'il existe, entre le ou les contours (10) du ou des motifs (9) et les contours (11) délimitant la zone périphérique (5), au moins une zone libre (12) ne comportant aucun gaufrage, marquage à sec ou autre signe distinctif.Roller (1) according to any one of Claims 4 to 6, characterized in that there exists, between the contour (s) (10) of the pattern (s) (9) and the contours (11) delimiting the peripheral zone (5 ), at least one free zone (12) having no embossing, dry marking or other distinctive sign. Rouleau (1) selon l'une quelconque des revendications 4 à 7, caractérisé en ce que le nombre total de types de motifs (9) différents présents sur un même rouleau (1) complet est un nombre entier compris entre 1 et 25, de préférence entre 1 et 6.Roll (1) according to any one of Claims 4 to 7, characterized in that the total number of different types of patterns (9) present on the same complete roll (1) is an integer between 1 and 25, of preferably between 1 and 6. Rouleau (1) selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'il comporte au moins une feuille (2) présentant dans sa zone centrale (8) ne faisant pas partie de la zone périphérique (5), aucun motif (9) réalisé par gaufrage et/ou marquage à sec.Roll (1) according to any one of claims 1 to 3, characterized in that it comprises at least one sheet (2) having in its central zone (8) not forming part of the peripheral zone (5), none pattern (9) produced by embossing and / or dry stamping. Rouleau (1) selon l'une quelconque des revendications 4 à 8 et selon la revendication 10, caractérisé en ce que les feuilles (2) présentant un motif (9) alternent avec des feuilles (2) ne présentant pas de motif (9).Roll (1) according to any one of claims 4 to 8 and according to claim 10, characterized in that the sheets (2) having a pattern (9) alternate with sheets (2) having no pattern (9) . Rouleau (1) selon l'une quelconque des revendications 1 à 10, caractérisé en ce que la surface de liaison entre lesdits plis (3) d'au moins une feuille (2), de préférence de chaque feuille (2), est comprise entre 1 % et 50 %, de préférence entre 3 % et 7 % de la surface totale couverte par la zone périphérique (5).Roll (1) according to any one of claims 1 to 10, characterized in that the connection surface between said plies (3) of at least one sheet (2), preferably of each sheet (2), is included between 1% and 50%, preferably between 3% and 7% of the total area covered by the peripheral zone (5). Rouleau (1) selon l'une quelconque des revendications 1 à 11, caractérisé en ce que le nombre de plis (3) individuels formant chaque feuille (2) est compris entre 2 et 10 et de préférence entre 4 et 7 plis (3) individuels.Roll (1) according to any one of claims 1 to 11, characterized in that the number of individual plies (3) forming each sheet (2) is between 2 and 10 and preferably between 4 and 7 plies (3) individual. Rouleau (1) selon l'une quelconque des revendications 1 à 12, caractérisé en ce que le grammage de chaque feuille (2) est compris entre 30 g/m2 et 150 g/m2, de préférence compris entre 85 g/m2 et 115 g/m2.Roll (1) according to any one of claims 1 to 12, characterized in that the grammage of each sheet (2) is between 30 g / m 2 and 150 g / m 2 , preferably between 85 g / m 2 and 115 g / m 2 . Rouleau (1) selon l'une quelconque des revendications 1 à 13, caractérisé en ce que la liaison entre lesdits au moins deux plis (3) individuels de chaque feuille (2) est réalisée par collage.Roll (1) according to any one of claims 1 to 13, characterized in that the connection between said at least two individual plies (3) of each sheet (2) is carried out by gluing.
EP19193632.7A 2007-03-28 2008-03-27 Roll of fibrous cellulose-based product Active EP3590400B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22160956.3A EP4029420A1 (en) 2007-03-28 2008-03-27 Roll of fibrous cellulose-based product

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0754097A FR2914170B1 (en) 2007-03-28 2007-03-28 ROLL OF FIBROUS CELLULOSIC PRODUCT
PCT/FR2008/050531 WO2008135690A1 (en) 2007-03-28 2008-03-27 Roll of fibrous cellulose-based product
EP08788057.1A EP2142060B1 (en) 2007-03-28 2008-03-27 Roll of fibrous cellulose-based product

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP08788057.1A Division EP2142060B1 (en) 2007-03-28 2008-03-27 Roll of fibrous cellulose-based product

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP22160956.3A Division-Into EP4029420A1 (en) 2007-03-28 2008-03-27 Roll of fibrous cellulose-based product
EP22160956.3A Division EP4029420A1 (en) 2007-03-28 2008-03-27 Roll of fibrous cellulose-based product

Publications (2)

Publication Number Publication Date
EP3590400A1 true EP3590400A1 (en) 2020-01-08
EP3590400B1 EP3590400B1 (en) 2022-08-17

Family

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EP19193632.7A Active EP3590400B1 (en) 2007-03-28 2008-03-27 Roll of fibrous cellulose-based product
EP22160956.3A Pending EP4029420A1 (en) 2007-03-28 2008-03-27 Roll of fibrous cellulose-based product
EP08788057.1A Active EP2142060B1 (en) 2007-03-28 2008-03-27 Roll of fibrous cellulose-based product

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EP22160956.3A Pending EP4029420A1 (en) 2007-03-28 2008-03-27 Roll of fibrous cellulose-based product
EP08788057.1A Active EP2142060B1 (en) 2007-03-28 2008-03-27 Roll of fibrous cellulose-based product

Country Status (12)

Country Link
US (1) US8383223B2 (en)
EP (3) EP3590400B1 (en)
CA (1) CA2682218A1 (en)
EA (1) EA014828B1 (en)
ES (2) ES2929282T3 (en)
FI (1) FI3590400T3 (en)
FR (1) FR2914170B1 (en)
HU (2) HUE060408T2 (en)
MX (1) MX2009010259A (en)
PL (2) PL2142060T3 (en)
PT (2) PT2142060T (en)
WO (1) WO2008135690A1 (en)

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Also Published As

Publication number Publication date
CA2682218A1 (en) 2008-11-13
PT3590400T (en) 2022-10-07
FR2914170A1 (en) 2008-10-03
FI3590400T3 (en) 2022-11-30
PT2142060T (en) 2019-12-02
EP3590400B1 (en) 2022-08-17
EP2142060B1 (en) 2019-08-28
US8383223B2 (en) 2013-02-26
EA200901306A1 (en) 2010-04-30
PL2142060T3 (en) 2020-03-31
ES2755738T3 (en) 2020-04-23
HUE046430T2 (en) 2020-03-30
WO2008135690A1 (en) 2008-11-13
HUE060408T2 (en) 2023-02-28
EP4029420A1 (en) 2022-07-20
EA014828B1 (en) 2011-02-28
FR2914170B1 (en) 2012-08-31
US20100112264A1 (en) 2010-05-06
MX2009010259A (en) 2009-10-13
PL3590400T3 (en) 2022-11-28
EP2142060A1 (en) 2010-01-13
ES2929282T3 (en) 2022-11-28

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