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 is intended in particular 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 one (or essentially made of) fibrous cellulosic product. More particularly and according to a preferred embodiment, it relates to a roller, some of which leaves, and even more preferably of which each sheet which composes it, has a single single pattern entirely comprised in the format of said one or more sheets, it is that is, not cut by one or more of the four edges that delimit the sheet (usually of shape or rectangular surface).
• the different folds of the same size superimposed are, depending on the intended use of the sheet and / or the requirements imposed by the consumer's wishes and / or the constraints of production techniques, more or less strongly related to each other by using different techniques of assembly of said folds.
• the combination of folds in a product multiplied essentially in cellulose wadding is achieved 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 domestic papers to associate folds with each other such as, for example, an alcohol polyvinyl solution in an aqueous medium.
• 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, folds to bind so that the latter, nested in each other under the pressure of a cylinder, are held together once the association operation is complete.
• the patterns currently used are therefore of relatively small size and repeated a number of times in the direction and direction of each sheet, usually with at least two similar or identical patterns per sheet of paper, for example toilet paper.
• Another disadvantage related to the type of bonding association referred to above is a stiffening of the paper sheet (because of the glue) and therefore a more difficult and more difficult winding. Furthermore, with an embossing-type mechanical treatment, there is an "upside-down" effect due to the protuberances, especially in the area of use, ie in the central zone of the paper sheet and an accelerated piercing. by a liquid of said paper by a so-called “tent” effect at the aforementioned association protuberances. 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.
• Said technical zone which can group several portions of disjoint zones (which also start from one or more edges towards the center of the sheet) serves mainly to ensure the combination of the folds and confers a certain desired peripheral rigidity, in particular by the consumer himself.
• the surface of the technical zone thus varies between a lower limit corresponding to a sufficient resistance to delamination and an upper limit where the product would become too rigid.
• Said use zone which can also group several portions of disjunct zones (at or near the center of the sheet) serves mainly to impart softness, thickness, flexibility, a barrier effect (diffusion) and / or resistance (for example to piercing).
• the subject of the present invention is therefore a roll of sheets based on a fibrous cellulosic product, such as toilet paper, comprising a wound strip consisting of a continuous succession of sheets made of cellulose wadding made by association with at least two individual plies, each sheet being retained, with detachment capability, with the one or both adjacent sheets by one, respectively two pre-cut lines, characterized in that said at least two individual plies of each sheet are bonded by gluing 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 area 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, has in its central zone not forming part of the peripheral zone, at least one pattern made by embossing and / or dry marking.
• FIG. schematically, a first example of a roll of sheets according to the invention
• FIG. 2 schematically represents an enlarged view showing more precisely, and seen from above, an extract of a second example of a roll of sheets according to the invention
• Figure 3 schematically shows an enlarged view, and seen from above, of a multiplied sheet of a product A not according to the invention and given as a comparative example
• FIG. 4 schematically represents an enlarged view, seen from above, of a multiplied sheet of a product B according to the invention.
• the subject of the present invention is thus a roll 1 of sheets 2 based on a fibrous cellulosic product, such as toilet paper, comprising a wound strip consisting of a continuous succession of sheets 2 to cellulose wadding base made by combining at least two individual plies 3, each sheet 2 being retained, with the ability to detach, with the adjacent sheet or sheets 2 by one or respectively two precut lines 4, characterized in that said at least two individual plies 3 of each sheet 2 are bonded by bonding or 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 area of each sheet 2.
• a fibrous cellulosic product such as toilet paper
• the above-mentioned surface represents between 50% (excluded) and 60% (inclusive) of the total area of each sheet 2.
• the bonding between said at least two individual plies 3 of each sheet 2 is carried out by gluing.
• a sheet 2 consists of at least two superposed individual plies 3, 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 (ie in the direction of travel 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 (thus in the transverse direction ST, that is to say perpendicular to the direction of travel of the wound product ).
• the connection of the plies 3 such that the resistance to delamination between each individual ply 3 is at least 1 g / cm.
• the individual individual plies 3 superimposed have not been shown in the accompanying figures.
• the example shown comprises five rectangular superimposed folds of the same size (14 cm ⁇ 11 cm), the fold 3 represented in the appended figures being that located on the external face (visible to the user ) of the roll 1 according to the invention.
• the other plies may be single plies provided all over their face with a uniform and continuous uniform micro-embossing consisting of standard protuberances with a density of at least 20 protuberances / cm 2 , preferably because of a density between 30 and 100 protuberances / cm 2 .
• the plies 3, for example six in number, may be interconnected by peripheral gluing, for example gluing obtained by applying glue to a conventional embossing consisting of protuberances whose vertices are circular in shape of a diameter.
• protuberances between 5 protuberances / cm 2 and 80 protuberances / cm 2 , preferably between 5 protuberances / cm and 30 protuberances / cm.
• the bonding may be carried out by applying an adhesive on any embossing pattern but located in the peripheral zone 5, for example that resulting from the particular embossing shown in more detail in FIG. 2 for another example of a roll 1 according to FIG. 'invention.
• a preferred method of bonding is that described in the French patent published under No. FR-A-2,653,793 which ensures a uniform glue deposit in the bonding zone without stiffening the sheet.
• connection between said at least two individual plies 3 of each sheet 2 can be achieved by any mechanical connection known to those skilled in the art allowing to associate in a purely physical way 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 may be between two and ten and preferably between four and seven individual plies.
• the plies 3 are normally made of cellulose wadding (pure or majority) with a grammage of between 10 g / m and 50 g / m 2 and may include the additives conventionally used in this field insofar as the latter do not interfere. critically with the other technical features of the invention.
• the grammages and the nature of the plies 3 may vary from one ply 3 to the other 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 included between 30 g / m 2 and 150 g / m 2 , preferably between 85 g / m 2 and 115 g / m 2 .
• the roll 1 according to the invention is characterized in that all of the bonding surfaces between said plies 3 of at least one sheet 2, preferably of each sheet 2 is smaller than the surface covered by said peripheral zone 5.
• the connecting surface between said plies 3 of at least one sheet 2, preferably each sheet 2 is between 1% and 50%, preferably between 3% and 7% of the total area 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 sheets 2 when they are still attached to each other, in particular to ensure a good winding of said sheets 2 while keeping a good resistance to the delamination of the latter.
• peripheral zone 5 is meant the zone starting from one or more or even all four edges or ends of the surface defining the sheet 2 (including or including them) and extending towards the center of said sheet 2. This avoids any yawn folds 3 or the formation of folds that adversely affect the appearance of the product.
• An example of a simple geometry of this peripheral zone 5 is a continuous rectilinear strip of constant thickness all around said rectangular sheet 2.
• the shape of said peripheral zone 5 may 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 outskirts of sheet 2.
• the roll 1 according to the invention consists of relatively "thick" sheets 2 which, while keeping good softness, curl perfectly to form a roll 1.
• the roll 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 each sheet 2.
• connection between said at least two individual plies 3 of each sheet 2 is made in said peripheral zone 5 in a discontinuous manner, preferably by connection points 6 and / or by straight lines or portions of straight lines 7 and / or by connecting line (s) curve (s) 7 '.
• the roller 1 according to the invention is, in a particular glued example, characterized in that the adhesive is deposited in said peripheral zone 5 in a discontinuous manner, here by connection points 6, so bonding points (of form round or substantially round) distributed in said peripheral zone 5.
• connection points 6 so bonding points (of form round or substantially round) distributed in said peripheral zone 5.
• the other bonding or bonding points 6 being suggested by dots .
• the existence of the neighboring sheets 2 to the left and to the right of the sheet 2 shown in FIG. 2 has only been suggested by the drawing of the general outline without representing the details of these sheets 2 which are identical to that shown in detail in the center of Figure 2.
• connection points 6 are located on at least one connecting straight line portion 7 originating from one or more of the four corners of at least one sheet 2, preferably each sheet 2, and directed towards the inside or the edge adjacent said corner of said sheet or sheets 2.
• the right portion or portions link 7 are not parallel to the sides defining the length and / or the width of a sheet 2, preferably each sheet 2.
• the roll 1 according to the invention is further characterized in that the connection points 6 are located on at least one curved connecting line 7 'in an arc of circle whose two ends are situated on one and the same edge. one or each sheet 2 and the concavity of which is directed towards the interior of said sheet or sheets 2.
• Such curved connecting lines 7 ' have also been suggested in FIG. 2.
• the spacing between the adjacent connection points 6 of the same portion of straight line 7 or curve T is not uniform, on at least one sheet 2, preferably on each sheet 2.
• connection points 6 may vary and, as shown, for example be reduced as one approaches the center of the sheet 2.
• the roll 1 according to the invention is characterized in that at least one sheet 2, preferably each sheet 2, has in its central zone 8 not forming part of the peripheral zone 5, at least one pattern 9 made by embossing and / or dry marking.
• the pattern or patterns 9 are in the form of line (s) and / or point (s) of patterns 9 '.
• the pattern (s) 9 are in the form of at least one homogeneously embossed closed surface at the rate of an overall density of pattern points 9 'in the form of protuberances due to the embossment between 20 protuberances / cm 2 and 100 protuberances / cm 2 , preferably between 60 protuberances / cm 2 and 100 protuberances / cm, 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.
• the pattern 9 is a specific square geometrical shape or an embossed oval with conventional round protuberances.
• the roll 1 according to the invention is 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 zone device 5 of sheet 2 or 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-cut line 4 also includes non-rectilinear boundaries (for example waves) even though straight 4 pre-cut lines are widely preferred. These lines are classic and formed by all techniques known and usually employed by those skilled in the art, for example by stamping or cutting with appropriate blades in an ad hoc device at the winding head where the rollers are formed.
• the precut can be done according to perforations in the form of dotted (round) or dashes (segments).
• the pattern (s) 9 comprise one or more digits 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 one reason per sheet 2.
• the present invention is also characterized in that said roll 1 comprises at least one sheet 2 having in its central zone 8, not forming part of the peripheral zone 5, no pattern 9 made by embossing and / or dry marking. It is thus possible to leave one or more blank sheets 2 at their central zones 8, which makes it possible to increase the number of combinations of products that can be obtained.
• the sheets 2 having a pattern 9 alternate with leaves 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 may be laminates multiplis, from their The respective reels are guided to pass around two rubber cylinders and then between them and two steel embossing cylinders provided with appropriate reliefs. These reliefs may, for example, be distributed according to the patterns visible in FIGS. 1 and 2.
• One of the two aforementioned plies 3 is glued by means of a gluing roll (or applicator roll) made of rubber which comprises a part made of relief whose design corresponds to that of the peripheral area 5 sizing sheets 2 so that the glue driven by the applicator cylinder is distributed in this pattern.
• Gluing is performed only on the peripheral zone 5 corresponding to the raised part of the sizing cylinder.
• one or both of the cylinders are provided with reliefs along a peripheral zone 5 of the desired roll product format. We can then use a smooth gluing cylinder. After sizing, the two main plies 3 are assembled in the nip between the embossing cylinders which rotate at equal speeds and opposite directions.
• a single or multiple ply 3 is waffled between a rubber cylinder and a suitably etched steel cylinder, that is to say with reliefs along the periphery of the desired product format.
• the adhesive is deposited on the summits of the reliefs.
• it is applied to the fold 3 a second, respectively third fold 3 by means of a third rubber marrying type cylinder.
• the second and third plies 3 can also be embossed before their association.
• This third cylinder thus ensures the association of the second and third fold 3 respectively with the first.
• a steel cylinder for the third cylinder can also be used a steel cylinder.
• a first roll product A of which a detached sheet 2 has been schematically shown in FIG. 3 consists of six plies of pure cellulose wadding each having a basis weight of 18.7 g / m 2 .
• This product A was obtained by combining said plies 3 by an embossing / bonding with Forbo SWFT L998 / 4 adhesive according to the pattern shown in FIG. 3 where the embossing / gluing is carried out by the connection points 6, namely, bonding in the form of large protuberances 6 and distributed over a large part of the sheet 2 and mainly in the central zone 8 of the latter.
• All other sheets 2 (not shown) of the roll 1 of product A are made in the same way.
• the latter was compared with a product B according to the invention consisting of the same plies as the product A but according to an association of said plies by an embossing / bonding according to the invention.
• the folds 3 of the sheet 2 of the product B have been associated in the pattern shown in FIG. 4 (which also represents a sheet 2 detached from the roll 1) where the embossing / gluing is carried out by the connection points 6, namely gluing points in the form of large protuberances 6 and distributed only on the peripheral zone 5 of the sheet 2.
• the simply embossed zone (without gluing) is located at the central zone 8 of said sheet 2. In this single zone the embossing is of the type constituting the pattern 9 in Figures 1 and 2, that is to say consisting of pattern points 9 '. All other sheets 2 (not shown) of the roll 1 of product B are also made in the same way.
• the non-associated central zone 8 offers the best protection for the user.
• the first folds 3 to yield are in central folds, while with the associated use zone, the first folds 3 that break are those from the outside.
• 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 or not pass through the product.
• 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 of diameter slightly greater than the large diameter of a truncated cone surrounded by the sheet.
• the tensile force on the sheet (in N) is measured before and during its passage through the hole (in mm).
• the slope of the curve changes and the value of the force is measured at the point of inflection.

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• Health & Medical Sciences (AREA)
• Public Health (AREA)
• Sanitary Thin Papers (AREA)
• Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
• Paper (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Related Child Applications (2)

Publications (2)

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ID=38626796

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Family Cites Families (46)

• 2007
  • 2007-03-28 FR FR0754097A patent/FR2914170B1/fr active Active
• 2008
  • 2008-03-27 PT PT191936327T patent/PT3590400T/pt unknown
  • 2008-03-27 ES ES08788057T patent/ES2755738T3/es active Active
  • 2008-03-27 PT PT87880571T patent/PT2142060T/pt unknown
  • 2008-03-27 ES ES19193632T patent/ES2929282T3/es active Active
  • 2008-03-27 WO PCT/FR2008/050531 patent/WO2008135690A1/fr active Application Filing
  • 2008-03-27 FI FIEP19193632.7T patent/FI3590400T3/fr active
  • 2008-03-27 HU HUE19193632A patent/HUE060408T2/hu unknown
  • 2008-03-27 MX MX2009010259A patent/MX2009010259A/es active IP Right Grant
  • 2008-03-27 HU HUE08788057A patent/HUE046430T2/hu unknown
  • 2008-03-27 EP EP19193632.7A patent/EP3590400B1/de active Active
  • 2008-03-27 CA CA002682218A patent/CA2682218A1/en not_active Abandoned
  • 2008-03-27 EP EP22160956.3A patent/EP4029420A1/de active Pending
  • 2008-03-27 EA EA200901306A patent/EA014828B1/ru not_active IP Right Cessation
  • 2008-03-27 EP EP08788057.1A patent/EP2142060B1/de active Active
  • 2008-03-27 US US12/532,860 patent/US8383223B2/en active Active
  • 2008-03-27 PL PL08788057T patent/PL2142060T3/pl unknown
  • 2008-03-27 PL PL19193632.7T patent/PL3590400T3/pl unknown

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