EP4029420A1 - Roll of fibrous cellulose-based product - Google Patents
Roll of fibrous cellulose-based product Download PDFInfo
- Publication number
- EP4029420A1 EP4029420A1 EP22160956.3A EP22160956A EP4029420A1 EP 4029420 A1 EP4029420 A1 EP 4029420A1 EP 22160956 A EP22160956 A EP 22160956A EP 4029420 A1 EP4029420 A1 EP 4029420A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sheet
- roll
- plies
- pattern
- 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.)
- Pending
Links
- 229920002678 cellulose Polymers 0.000 title claims abstract description 12
- 239000001913 cellulose Substances 0.000 title claims abstract description 12
- 230000002093 peripheral effect Effects 0.000 claims abstract description 36
- 238000004049 embossing Methods 0.000 claims description 29
- 238000004026 adhesive bonding Methods 0.000 claims description 22
- 230000000717 retained effect Effects 0.000 claims description 3
- 239000000123 paper Substances 0.000 description 12
- 239000003292 glue Substances 0.000 description 11
- 238000012360 testing method Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000004804 winding Methods 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 230000032798 delamination Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 208000002740 Muscle Rigidity Diseases 0.000 description 1
- 241001282135 Poromitra oscitans Species 0.000 description 1
- 206010048232 Yawning Diseases 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000012736 aqueous medium Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 235000009508 confectionery Nutrition 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 230000000763 evoking effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- 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 aimed in particular at 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 (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 comprised in the format of said sheet or sheets, that is i.e. which is not cut by one or more of the four edges which delimit the sheet (generally of rectangular shape or surface).
- Products of the aforementioned type packaged in the form of rolls are already generally known.
- the sheets of product to be dispensed are usually rolled up on a central mandrel of cylindrical section made of cardboard or the like.
- said rolled sheets of interest to the user are conventionally made from fibrous cellulosic products made of (or mainly made of) cellulose wadding and assembled in the form of one or more superposed linked plies (laminated products or of the type "sandwich”) which follow one another in single file on the roll, 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 or detach a or more sheets from the roll.
- the different superimposed plies 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 assembly techniques of said folds.
- association of the plies in a multi-ply product essentially made of cellulose wadding is carried out by the application of an adhesive between said plies.
- Said gluing is carried out by means of any adhesive product generally used in the field of sanitary and household papers to associate plies with each other 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 deforming locally, by crushing, the folds to be bound so that the latter, nested in each other under the pressure of a cylinder, are held together once the operation of association is completed.
- the patterns currently used are therefore relatively small in size and repeated a number of times in the machine direction and cross direction of each sheet, usually with at least two similar or identical patterns per sheet of paper, for example toilet paper.
- Another disadvantage linked to the aforementioned type of association by gluing consists of a stiffening of the sheet of paper (due to the glue) and therefore a more difficult and more delicate winding. Furthermore, with a mechanical treatment of the embossing type, an "upside-down" effect is observed due to the protrusions, in particular in the zone of use, that is to say in the central zone of the sheet of paper and an accelerated piercing by a liquid of said paper by a so-called “tent fabric” effect at the level of the aforementioned association protrusions.
- the resistance at the level of the embossing patterns is weakened in the zone of use due in particular to the destruction of the fibers.
- the present invention aims to overcome at least some of these drawbacks.
- said attachment 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 roll.
- Two different zones are then created per sheet: a so-called “technical” or peripheral zone starting from the edges in the running direction and/or across and going towards the inside of the sheet and a so-called “use” zone located at the level of the center of the product unit (a sheet).
- Said technical zone which can group together several portions of disjointed zones (which also start from one or more edges towards the center of the sheet) serves mainly to ensure the association of the folds and confers a certain desired peripheral rigidity, in particular by the consumer himself.
- the surface of the technical zone therefore varies between a lower limit corresponding to sufficient resistance to delamination and an upper limit where the product would become too rigid.
- Said zone of use which can also group together several portions of separate zones (at or near the center of the sheet) is mainly used to confer 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 based on cellulose wadding produced by combining at at least two individual plies, each sheet being retained, with the possibility of detachment, with the or both adjacent sheets by one, respectively two pre-cut lines, characterized in that the 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 surface of each sheet.
- 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 made by embossing and/or dry stamping.
- the subject of the present invention is therefore 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 based on cellulose wadding produced by association of at least two individual plies 3, each sheet 2 being retained, with the option of detachment, with the or both adjacent sheets 2 by one, respectively two pre-cut lines 4, characterized in that the said at least two plies 3 individual of each sheet 2 are bonded by gluing 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% (inclusive) of the total surface of each sheet 2.
- connection between said at least two individual plies 3 of each sheet 2 is made by gluing.
- a sheet 2 consists of at least two superimposed 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 (therefore in the running direction SM , that is to say parallel to the direction of travel of the rolled 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 rolled 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 various superimposed individual plies 3 have not been shown in the appended figures. It is accepted in the context of the present invention that the example represented comprises five superimposed rectangular 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 by the user ) of roll 1 according to the invention.
- the other plies may be single plies provided over their entire face with regular, continuous and uniform micro-embossing consisting of standard protuberances at a density of at least 20 protuberances/cm 2 , preferably at due to a density included between 30 and 100 protuberances/cm 2 .
- the folds 3, for example six in number, can be bonded together by means of a peripheral bonding, for example a bonding obtained by applying glue to a conventional embossing consisting of protuberances whose vertices are circular in shape with a diameter between 0.1 mm and 1.5 mm, preferentially between 0.6 mm and 1.1 mm distributed in a homogeneous manner according to a density of protuberances comprised between 5 protuberances/cm 2 and 80 protuberances/cm 2 , preferentially between 5 protuberances /cm 2 and 30 protuberances/cm 2 .
- a peripheral bonding for example a bonding obtained by applying glue to a conventional embossing consisting of protuberances whose vertices are circular in shape with a diameter between 0.1 mm and 1.5 mm, preferentially between 0.6 mm and 1.1 mm distributed in a homogeneous manner according to a density of protuberances comprised between 5 protuberances/
- the gluing 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 figure 2 for another example of roller 1 according to the invention.
- a preferred binding mode is that described in the French patent published under the number FR-A-2 653 793 which makes it possible to ensure 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 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 plies 3 are normally made of cellulose wadding (pure or majority) with a weight of between 10 g/m 2 and 50 g/m 2 and may include the additives conventionally employed in this field insofar as the latter do not not interfere critically 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 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 less than the surface covered by said peripheral zone 5.
- the connecting surface between said plies 3 of at least 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 a 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 (including it 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 are detrimental to the appearance of the product.
- An example of 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 at the periphery of sheet 2.
- the roll 1 according to the invention consists of relatively "thick" sheets 2 which, while maintaining good softness, roll up 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 over the entire circumference 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 made in said peripheral zone 5 in a discontinuous manner, preferably by connection points 6 and/or by lines or portions of connection lines 7 and/or by curved connecting line(s) 7'.
- 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 in a discontinuous manner, here by points of connection 6, therefore points of bonding (in the form round or substantially round) distributed in said peripheral zone 5.
- points of connection 6 points of bonding (in the form round or substantially round) distributed in said peripheral zone 5.
- FIG 2 shows only part of the bonding or bonding points 6 , the other connection or bonding points 6 being suggested by dotted lines.
- the existence of adjacent sheets 2 to the left and right of sheet 2 shown in figure 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 represented in detail in the center of the figure 2 .
- connection points 6 are located on at least one portion of the 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 sheet(s) 2.
- the portion(s) of connecting line 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, the two ends of which are located on the same edge of 'one or each sheet 2 and whose concavity is directed towards the inside of said sheet or sheets 2.
- Such curved connection lines 7' have also been suggested on the figure 2 .
- the spacing between the adjacent connection points 6 of the same straight 7 or curved 7′ connection line portion is not uniform, this on at least one sheet 2, preferably on each sheet 2.
- the distance between two adjacent connecting points 6 located on the same connecting line 7 can vary and, as shown, for example reduce as one approaches the center of the sheet 2.
- connection points 6 provision can be made for the spacing of the connection points 6 to be uniform on at least one sheet 2, preferably on each sheet 2.
- the roll 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 pattern 9 produced by embossing and/or dry stamping.
- the pattern(s) 9 are made in the form of line(s) and/or dot(s) of patterns 9'.
- the pattern or patterns 9 are produced in the form of at least one closed surface embossed in a homogeneous manner at the rate of an overall density of pattern points 9' in the form of protuberances due to the embossing comprised between 20 protuberances /cm 2 and 100 protuberances/cm 2 , preferably between 60 protuberances/cm 2 and 100 protuberances/cm 2 , the diameter of the peaks of circular section of the protuberances being between 0.1 mm and 1.5 mm, preferably between 0.3mm and 0.6mm.
- pattern 9 is a specific square geometric shape or an embossed oval with classic round protrusions.
- 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 comprised in the surface not belonging to the zone device 5 of sheet 2 or of each sheet 2.
- a pattern 9 preferably centered on sheet 2 is cut by a side edge or an edge defined by a pre-cut line 4.
- pre-cut line 4 also includes non-straight borders (for example waves) even if straight pre-cut 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 appropriate blades in an ad hoc device at the level of the winding head where the rolls are formed.
- the pre-cut can be done according to perforations in the form of dotted lines (rounds) or dashes (segments).
- the pattern or patterns 9 comprise one or more digits and/or one or more letters.
- 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, any pattern 9 produced by embossing and/or dry marking. It is thus possible to leave one or more sheets 2 blank at their central zones 8, which makes it possible to further increase the number of combinations of products that can be obtained.
- the sheets 2 having a pattern 9 alternate with sheets 2 not having a 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 papermaking field can be used.
- two main plies 3 of cellulose wadding, one and/or the other possibly being multi-ply laminates, coming from their respective reels are guided to pass around two rubber cylinders and then between these and two steel embossing cylinders provided with appropriate reliefs.
- These reliefs can, for example, be distributed according to the patterns visible on the figures 1 and 2 .
- One of the two aforementioned plies 3 is glued by means of a glue roller (or applicator roller) made of rubber which comprises a part in relief whose design corresponds to that of the peripheral zone 5 for gluing the sheets 2 of so that the glue driven by the applicator cylinder is distributed according to this pattern.
- One or both sheets 2 can be embossed over their entire surface.
- the gluing is carried out only on the peripheral zone 5 corresponding to the part in relief of the gluing roller.
- one of the two or both cylinders are provided with reliefs, along a peripheral zone 5 of the format of the desired roll product.
- a smooth glue roller can then be used.
- the two main plies 3 are assembled in the pinch gap provided between the embossing cylinders which rotate at equal speeds and in opposite directions.
- a single or multiple ply 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 ply 3 is applied to ply 3 by means of a third rubber cylinder of the matching type.
- the second and third plies 3 can also be embossed before their association. This third cylinder thus ensures the association of the second, respectively of the third ply 3 with the first.
- a steel cylinder can also be used for the third cylinder.
- the multi-ply sheet 2 thus issued from the manufacturing device is driven towards a winding head where it is possibly cut to the desired format and where the pre-cut lines 4 are formed at regular intervals in the strip of sheets 2 by a suitable device for blades before winding the product in the form of the roll 1.
- Tests have been carried out to verify the technical effectiveness of the invention compared to another roll product given by way of comparative example.
- a first product A on a roll of which a detached sheet 2 has been schematically represented in picture 3 consists of six plies of pure cellulose wadding, each with a weight of 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 picture 3 where the embossing/bonding 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.
- the four simply embossed zones (without gluing), for example by conventional micro-embossing, are located at the level of the four corners of said sheet 2. In these zones the embossing is of the type of that 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 roll 1 of product A are made in the same way.
- embossing is of the type of that 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 roll 1 of product B are also made in the same way.
- a breakthrough test was carried out on the two previous products A and B: The test consists in distributing drops of ten microliters of distilled water evenly in the central zone 8 of use and in checking whether or not these drops pass through the product.
- product B according to the invention only 9% of the drops pass through, unlike traditional embossing/combination (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 of passing a sheet of a given surface through a hole with a diameter slightly greater than the large diameter of a truncated cone surrounded by the sheet. The tensile force on the sheet is measured (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 at the point of inflection is noted.
- Comparative consumer tests were 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 clear improvement was recognized with regard to 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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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 is aimed in particular at 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 rolled up strip of sheets (2) of cellulose wadding separated by perforated or pre-cut lines (4), the individual plies (3) of each sheet (2) being glued to a peripheral surface (5) comprised 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 is aimed in particular at 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 (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 comprised in the format of said sheet or sheets, that is i.e. 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.Products of the aforementioned type packaged in the form of rolls are already generally known. In these rolls, the sheets of product to be dispensed are usually rolled up on a central mandrel of cylindrical section made of cardboard or the like. In the field concerned, said rolled sheets of interest to the user are conventionally made from fibrous cellulosic products made of (or mainly made of) cellulose wadding and assembled in the form of one or more superposed linked plies (laminated products or of the type "sandwich") which follow one another in single file on the roll, 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 or detach a or more sheets from 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 multi-ply rolls of sheets, the different superimposed plies 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 assembly techniques of said folds.
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 multi-ply product essentially made of cellulose wadding is carried out by the application of an adhesive between said plies. Said gluing is carried out by means of any adhesive product generally used in the field of sanitary and household papers to associate plies with each other 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 deforming locally, by crushing, the folds to be bound so that the latter, nested in each other under the pressure of a cylinder, are held together once the operation of association 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 gluing, the glue was hitherto deposited uniformly over the entire surface of the folds of the rolled 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 machine direction 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 unrolled from the roll, said patterns being cut more or less randomly when they meet one of the side edges of the tape formed by the succession of sheets hooked together when they are unrolled in the direction of travel and when they encounter 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 each other. 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, cause weakened areas to appear where the bonds are, by reason of the cutting of said pattern, weakened compared to what would be the case in an uncut whole 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 disadvantage linked to the aforementioned type of association by gluing consists of a stiffening of the sheet of paper (due to the glue) and therefore a more difficult and more delicate winding. Furthermore, with a mechanical treatment of the embossing type, an "upside-down" effect is observed due to the protrusions, in particular in the zone of use, that is to say in the central zone of the sheet of paper and an accelerated piercing by a liquid of said paper by a so-called “tent fabric” effect at the level of the aforementioned association protrusions.
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 zone 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 significant 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 in the wet state) 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 presentable aesthetics, preferably original and modifiable at will, with properties of resistance, flexibility and softness at least equivalent to those known rolled products where the patterns are repeated at frequencies which can be very high and which are cut at the edges of the sheets in the rolled-up state or detached 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 proposes a new association scheme which takes up, in a product packaged in a roll, the standard configuration with a new arrangement of the gluing 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, to obtain the most comfortable and efficient use area possible for the user, said attachment 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 roll. Two different zones are then created per sheet: a so-called "technical" or peripheral zone starting from the edges in the running direction and/or across and going towards the inside of the sheet and a so-called "use" zone located at the level of the center of the product unit (a 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 disjointed zones (which also start from one or more edges towards the center of the sheet) serves mainly to ensure the association of the folds and confers a certain desired peripheral rigidity, in particular by the consumer himself. The surface of the technical zone 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 zone of use, which can also group together several portions of separate zones (at or near the center of the sheet) is mainly used to confer 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.All of the surfaces of the two aforementioned zones or the combination of the surfaces of all the partial technical and usage zones which are complementary form the total surface of the unit sheet whose succession is rolled up.
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 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 based on cellulose wadding produced by combining at at least two individual plies, each sheet being retained, with the possibility of detachment, with the or both adjacent sheets by one, respectively two pre-cut lines, characterized in that the 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 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 made by embossing and/or dry stamping.
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
figure 1 schematically represents a first example of a roll of sheets according to the invention; - the
figure 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; - the
picture 3 - the
figure 4 schematically represents an enlarged view, seen from above, of a multi-ply sheet of a product B according to the invention.
En se référant aux
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% (inclusive) of the total surface of each
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
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
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 greater clarity, the various superimposed
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 plies (not shown) may be single plies provided over their entire face with regular, continuous and uniform micro-embossing consisting of standard protuberances at a density of at least 20 protuberances/cm 2 , preferably at due to a density included between 30 and 100 protuberances/cm 2 . The
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
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
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
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
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 roll 1 according to the invention is characterized in that all of the bonding surfaces between said
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.This avoids over-stiffening the
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
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
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.Quite advantageously, the roll 1 according to the invention consists of relatively "thick"
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 roll 1 according to the invention is characterized in that the connection between said at least two
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
Comme on l'a représenté sur les
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 with regard to the association of the
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 portion(s) of connecting
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
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
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
Comme on le voit sur la
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
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 reducing the joining surface at the level of the
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, provision can be made for the spacing of the connection points 6 to be uniform on at least one
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 roll 1 according to the invention is characterized in that at least one
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(s) 9 are made in the form of line(s) and/or dot(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 or
Dans les exemples illustrés aux
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 roll 1 according to the invention is characterized in that at least one
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 repetitive patterns, there is therefore no risk here that a
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 connection, it will be noted that the
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
On renforce ainsi le contraste entre ledit motif 9 et le reste du pli 3.This reinforces the contrast between said
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 or
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 roll product with any message, an advertising slogan, the name (commercial brand 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 way, provision can be made for the total number of different types of
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 roll 1 comprises at least one
Avantageusement, les feuilles 2 présentant un motif 9 alternent avec des feuilles 2 ne présentant pas de motif 9.Advantageously, the
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
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
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
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.According to a variant, a single or
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
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 have been carried out to verify the technical effectiveness 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
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
Les résultats des différents tests comparatifs sont donnés ci-dessous.The results of the various comparative tests are given below.
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 the same settings and starting fabric configuration, there is a marked improvement in resistance with embossing/association only on 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 a 20% improvement in strength in the travel direction and 7% in strength 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 unassociated
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 breakthrough test was carried out on the two previous products A and B:
The test consists in distributing drops of ten microliters of distilled water evenly in the
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 traditional embossing/combination (product A) where 100% of the drops pass through.
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 of passing a sheet of a given surface through a hole with a diameter slightly greater than the large diameter of a truncated cone surrounded by the sheet. The tensile force on the sheet is measured (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 at the point of inflection is noted.
On a obtenu pour les deux produits susvisés :
- Produit A : 215 +/- 20 cN
- Produit B (selon l'invention) : 175 +/- 15 cN
- 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 the order of 23% in flexibility compared with a known product.
- 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 gluing 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 were 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 clear improvement was recognized with regard to 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 indeed the simultaneity and synergy of these three characteristics which 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 appended 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 (13)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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FR0754097A FR2914170B1 (en) | 2007-03-28 | 2007-03-28 | ROLL OF FIBROUS CELLULOSIC PRODUCT |
EP19193632.7A EP3590400B1 (en) | 2007-03-28 | 2008-03-27 | Roll of fibrous cellulose-based 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 (3)
Application Number | Title | Priority Date | Filing Date |
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EP19193632.7A Division EP3590400B1 (en) | 2007-03-28 | 2008-03-27 | Roll of fibrous cellulose-based product |
EP19193632.7A Division-Into EP3590400B1 (en) | 2007-03-28 | 2008-03-27 | Roll of fibrous cellulose-based product |
EP08788057.1A Division EP2142060B1 (en) | 2007-03-28 | 2008-03-27 | Roll of fibrous cellulose-based product |
Publications (1)
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EP4029420A1 true EP4029420A1 (en) | 2022-07-20 |
Family
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EP08788057.1A Active EP2142060B1 (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 |
EP19193632.7A Active EP3590400B1 (en) | 2007-03-28 | 2008-03-27 | Roll of fibrous cellulose-based product |
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EP08788057.1A Active EP2142060B1 (en) | 2007-03-28 | 2008-03-27 | Roll of fibrous cellulose-based product |
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EP19193632.7A Active EP3590400B1 (en) | 2007-03-28 | 2008-03-27 | Roll of fibrous cellulose-based product |
Country Status (12)
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US (1) | US8383223B2 (en) |
EP (3) | EP2142060B1 (en) |
CA (1) | CA2682218A1 (en) |
EA (1) | EA014828B1 (en) |
ES (2) | ES2755738T3 (en) |
FI (1) | FI3590400T3 (en) |
FR (1) | FR2914170B1 (en) |
HU (2) | HUE060408T2 (en) |
MX (1) | MX2009010259A (en) |
PL (2) | PL3590400T3 (en) |
PT (2) | PT2142060T (en) |
WO (1) | WO2008135690A1 (en) |
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EP1845193A1 (en) | 2006-04-14 | 2007-10-17 | Georgia-Pacific France | Multi-ply absorbent sheet, roll and process for producing the same |
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FR2948863B1 (en) * | 2009-08-04 | 2013-07-26 | Maurice Granger | TAPE OF WIPING MATERIAL FOR EQUIPMENT DISPENSERS OF MATERIALS FOR HAND TOWELS, TOWELS, AND OTHER HYGIENE APPLICATIONS |
US11254024B2 (en) | 2013-06-12 | 2022-02-22 | The Procter & Gamble Company | Method of perforating a nonlinear line of weakness |
US10005197B2 (en) | 2013-06-12 | 2018-06-26 | The Procter & Gamble Company | Nonlinear line of weakness formed by a perforating apparatus |
USD704456S1 (en) * | 2013-06-13 | 2014-05-13 | Kimberly-Clark Worldwide, Inc. | Wiping substrate |
JP6284185B2 (en) * | 2014-03-03 | 2018-02-28 | 大王製紙株式会社 | Toilet roll manufacturing method and toilet roll |
EP2975177A1 (en) | 2014-07-17 | 2016-01-20 | Sca Tissue France | An absorbent sheet products strip having limited liquid strike-through property |
WO2016148894A1 (en) | 2015-03-17 | 2016-09-22 | The Procter & Gamble Company | Method for perforating a nonlinear line of weakness |
WO2016148899A1 (en) | 2015-03-17 | 2016-09-22 | The Procter & Gamble Company | Apparatus for perforating a web material |
WO2016148900A1 (en) | 2015-03-17 | 2016-09-22 | The Procter & Gamble Company | Apparatus for perforating a nonlinear line of weakness |
US11268243B2 (en) * | 2017-09-11 | 2022-03-08 | The Procter & Gamble Company | Sanitary tissue product with a shaped line of weakness |
US11806889B2 (en) | 2017-09-11 | 2023-11-07 | The Procter & Gamble Company | Perforating apparatus and method for manufacturing a shaped line of weakness |
US11806890B2 (en) | 2017-09-11 | 2023-11-07 | The Procter & Gamble Company | Perforating apparatus and method for manufacturing a shaped line of weakness |
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- 2008-03-27 PL PL19193632.7T patent/PL3590400T3/en unknown
- 2008-03-27 PT PT191936327T patent/PT3590400T/en unknown
- 2008-03-27 MX MX2009010259A patent/MX2009010259A/en active IP Right Grant
- 2008-03-27 EP EP08788057.1A patent/EP2142060B1/en active Active
- 2008-03-27 PL PL08788057T patent/PL2142060T3/en unknown
- 2008-03-27 HU HUE19193632A patent/HUE060408T2/en unknown
- 2008-03-27 US US12/532,860 patent/US8383223B2/en active Active
- 2008-03-27 HU HUE08788057A patent/HUE046430T2/en unknown
- 2008-03-27 EP EP22160956.3A patent/EP4029420A1/en active Pending
- 2008-03-27 ES ES19193632T patent/ES2929282T3/en active Active
- 2008-03-27 WO PCT/FR2008/050531 patent/WO2008135690A1/en active Application Filing
- 2008-03-27 EP EP19193632.7A patent/EP3590400B1/en active Active
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Also Published As
Publication number | Publication date |
---|---|
FR2914170B1 (en) | 2012-08-31 |
PT2142060T (en) | 2019-12-02 |
EA200901306A1 (en) | 2010-04-30 |
CA2682218A1 (en) | 2008-11-13 |
EP2142060A1 (en) | 2010-01-13 |
WO2008135690A1 (en) | 2008-11-13 |
US20100112264A1 (en) | 2010-05-06 |
EP3590400A1 (en) | 2020-01-08 |
FI3590400T3 (en) | 2022-11-30 |
ES2755738T3 (en) | 2020-04-23 |
EP3590400B1 (en) | 2022-08-17 |
HUE060408T2 (en) | 2023-02-28 |
ES2929282T3 (en) | 2022-11-28 |
PT3590400T (en) | 2022-10-07 |
PL3590400T3 (en) | 2022-11-28 |
EP2142060B1 (en) | 2019-08-28 |
HUE046430T2 (en) | 2020-03-30 |
MX2009010259A (en) | 2009-10-13 |
PL2142060T3 (en) | 2020-03-31 |
FR2914170A1 (en) | 2008-10-03 |
EA014828B1 (en) | 2011-02-28 |
US8383223B2 (en) | 2013-02-26 |
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