EP1209289B1 - Feuille de papier absorbant crêpé, cylindre pour le gaufrage et procédé de fabrication d'une telle feuille - Google Patents

Feuille de papier absorbant crêpé, cylindre pour le gaufrage et procédé de fabrication d'une telle feuille Download PDF

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Publication number
EP1209289B1
EP1209289B1 EP00403285.0A EP00403285A EP1209289B1 EP 1209289 B1 EP1209289 B1 EP 1209289B1 EP 00403285 A EP00403285 A EP 00403285A EP 1209289 B1 EP1209289 B1 EP 1209289B1
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EP
European Patent Office
Prior art keywords
sheet
protuberances
base
ply
roll
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.)
Expired - Lifetime
Application number
EP00403285.0A
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German (de)
English (en)
French (fr)
Other versions
EP1209289A1 (fr
Inventor
Pierre Graff
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Essity Operations France SAS
Original Assignee
SCA Tissue France SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to ES00403285.0T priority Critical patent/ES2547459T3/es
Application filed by SCA Tissue France SAS filed Critical SCA Tissue France SAS
Priority to EP00403285.0A priority patent/EP1209289B1/fr
Priority to CA002398309A priority patent/CA2398309A1/en
Priority to PCT/FR2001/003583 priority patent/WO2002042558A2/fr
Priority to US10/181,977 priority patent/US20030021953A1/en
Publication of EP1209289A1 publication Critical patent/EP1209289A1/fr
Priority to NO20023221A priority patent/NO332710B1/no
Priority to US11/860,179 priority patent/US20080020180A1/en
Application granted granted Critical
Publication of EP1209289B1 publication Critical patent/EP1209289B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/07—Embossing, i.e. producing impressions formed by locally deep-drawing, e.g. using rolls provided with complementary profiles
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/02—Patterned paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/30—Multi-ply
    • D21H27/40—Multi-ply at least one of the sheets being non-planar, e.g. crêped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0707—Embossing by tools working continuously
    • B31F2201/0715—The tools being rollers
    • B31F2201/0723—Characteristics of the rollers
    • B31F2201/0728—Material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0707—Embossing by tools working continuously
    • B31F2201/0715—The tools being rollers
    • B31F2201/0723—Characteristics of the rollers
    • B31F2201/0733—Pattern
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0707—Embossing by tools working continuously
    • B31F2201/0715—The tools being rollers
    • B31F2201/0723—Characteristics of the rollers
    • B31F2201/0738—Cross sectional profile of the embossments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0756—Characteristics of the incoming material, e.g. creped, embossed, corrugated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0758—Characteristics of the embossed product
    • B31F2201/0761—Multi-layered
    • B31F2201/0764—Multi-layered the layers being nested
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0784—Auxiliary operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0784—Auxiliary operations
    • B31F2201/0787—Applying adhesive
    • 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
    • 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.]
    • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness

Definitions

  • the invention relates to a sheet of paper, in particular an absorbent paper sheet of creped cellulose wadding, comprising an embossing pattern.
  • the invention particularly relates to a sheet of paper, consisting in particular of at least one fold of absorbent paper made of creped cellulose wadding, intended for the field of wiping in domestic, household or industrial use, that is to say say likely to be used as paper towels, cloth etc.
  • embossing gives bouffant to the sheet and it induces an improvement in the absorption of liquids, touch and softness. It has been sought to further increase the absorption capacity by creating multilayer sheets obtained by combining at least two layers, also called folds, each consisting of at least one of said embossed sheets.
  • the former is known in the field as "nested" or interlocking. It consists, first, embossing each of the plies separately so as to form surface generally generally frustoconical protrusions or truncated pyramids. Then glue is deposited on the top of the protuberances of one of the folds, and the folds are arranged so that the faces having the protuberances come opposite, the protuberances of one between the protuberances of the other. The folds are finally assembled so that the protuberances having been glued together fit between the protuberances of the other fold.
  • the two plies are linked by glue points between the tops of the protuberances of a fold and unembossed areas between the protuberances of the other fold.
  • a structure is produced whose voids thus formed are suitable for ensuring the sheet an improved absorption.
  • the outer faces have a smooth and soft feel due to the recessed areas formed by the back of the protuberances. This technique is illustrated by the patent US Patent 3,867,225 .
  • the second method of assembly is known in the field under the designation points / tips. It differs from the previous one by the relative disposition of the two folds. These, after they have been embossed separately, are brought one on the other so as to coincide the tops of the protuberances. The folds are linked together by the tops of the protuberances, tips against points. This technique is illustrated by the patent US Patent 3,414,459 .
  • each of these protuberances is generally frustoconical in shape, each truncated cone being formed by a homologous pin belonging to an embossing cylinder.
  • Each pin engraved on the cylinder has an angle at the summit less than or equal to 60 ° giving it a generally pointed shape.
  • the height of the pins is for example between 0.4 mm and 0.6 mm, the choice of this total height being a compromise depending on the density of the pins which is in inverse function of the height of the pins.
  • decorative patterns consisting of series of protuberances which are arranged at least in part along curves, portions of curves or straight lines-or combinations of such portions of curves and / or straight lines.
  • some of said portions are, at least partially, parallel to one another.
  • the protuberances form closed curves comprising circles or possibly concentric portions of circles.
  • a complex sheet comprising the combination of two folds, at least one of the folds comprises a high density background pattern and small dimensions of the protuberances, also called “micro-embossing", and a decorative main pattern constituted by series of protuberances of larger dimensions, and in particular of greater height, also called “macro-embossing”.
  • the macro-protuberances constituting the main decorative pattern have a density of less than 20 protuberances per cm 2 and are combined with the micro-protuberances of the background pattern which have a density greater than 30 per cm 2 and preferably greater than or equal to 40 per cm 2 .
  • products are produced with macro-protuberances, for example of height between 0.5 and 2.5 millimeters, and micro-protuberances of height between 0.1 and 0.3 mm. These heights correspond to those that can be measured on the fold after embossing, and not at the height of the pins of the engraved embossing cylinder.
  • embossing by increasing the overall thickness of the sheet, leads to an improvement in the absorption of the liquids, but also in its flexibility due to the rupture of part of the bonds between the fibers of the cellulose wadding. Embossing thus generally results in a loss of tear strength.
  • the sheet may contain additives which give it increased resistance to tearing, especially in the wet state.
  • embossing is also more marked because it is desired to obtain a greater absorption capacity.
  • EP-A-0379767 discloses an engraved roll for embossing a fold formed of nonwoven and melt bonded synthetic fibers.
  • the cylinder has pins in the form of truncated pyramids with flattened vertices, and whose corners of the pins are rounded to prevent the formation of fiber clusters cut on the surface of the cylinder.
  • corner edges and the upper edges of each pin are sharp edges, which implies that the edges of the protuberances obtained are also sharp edges.
  • the document EP-A-0642614 an embossed sheet having a fold with a micro-protuberance pattern, the profile of the base of each of the protuberances is hexagonal. In addition, the top of each protuberance is flattened and sharp-edged.
  • the object of the invention is to propose an improved design of an embossed sheet comprising at least one ply with a micro-protrusion background pattern and allowing especially, but not only, its association with a macro-protuberance pattern.
  • the aim of the invention is to improve the performance and technical characteristics of the sheet in the case of a combination of micro-protuberances and macro-protuberances, and to improve the final appearance of the sheet by better displaying the macro-pattern.
  • protuberances which, according to the state of the art, is "drowned” in the background pattern and is greatly “flattened” further preventing the recovery of the relief and the fleece effect.
  • the invention proposes an embossed sheet composed of at least one fold of creped cellulose wadding of grammage between 12 and 30 g / m 2 of the type comprising an embossing pattern comprising at least a first series of protuberances formed projecting on one side of the fold and having a density greater than 20 protuberances per cm 2 , characterized in that each protuberance of the first series comprises a polyhedron trunk base and a flattened free end section with edges rounded.
  • the invention also proposes an engraved roll for embossing at least one fold belonging to an embossed sheet according to the invention, of the type comprising a series of pins to form the protuberances belonging to said first series, characterized in that each pin comprises a polyhedron trunk base and a flattened free end section.
  • the invention also proposes a method of manufacturing a sheet according to the invention, characterized in that it consists in embossing a first ply of cellulose wadding on a cylinder engraved according to the background pattern according to the invention so as to to increase its thickness by less than 50%, then to then emboss said fold according to said main pattern.
  • Said fold may be associated with at least one second fold which may be embossed beforehand.
  • figure 1 an exemplary embodiment of a complex sheet of embossed paper, which is here a sheet of paper consisting of two folds, upper and lower 14, which are assembled according to the known technique in so-called “Nested” mode.
  • Each fold of absorbent paper is creped cellulose wadding and the sheet 10 is intended for all types of hygiene products or household.
  • the cellulose wadding whose grammage is between 12 and 30 g / m 2 , is preferably of the type obtained by conventional wet pressing, known as CWP.
  • the sheet of paper shown in figure 1 is for example intended to be incorporated in a roll of paper towels.
  • the lower fold 14 is a fold made in accordance with the teachings of the invention and, in this embodiment, it comprises a bottom pattern consisting of micro-protuberances. 16 and a main pattern consisting of a series of macro-protuberances.
  • the design and the density of the micro-protuberances 14 arranged in regular pattern gives the bottom of the fold 14 a textile appearance, while the macro-protuberances 18 are here arranged in regular pattern, especially in the form of concentric circles.
  • the background pattern is arranged between the alignments forming the main pattern. In particular, the background pattern fills the area between two concentric circles. The space between two adjacent macro-protuberances along the alignments forming the circles does not include visible micro-protuberances of the background pattern.
  • the number of macro-protuberances is less than 20 per cm 2 . It allows the association of folds in "Nested" mode. In this case, it is preferably between 5 and 15 per cm 2 , and more particularly between 5 and 9.
  • connection between the upper fold and the lower fold 14 is obtained, preferably by bonding the vertices 22 of the macro-protuberances 18 with parts of the inner face, here below, vis-à-vis -vis 24 of the upper fold.
  • each protuberance 16 of the lower fold bottom pattern 14 includes a polyhedron trunk base 28 and a flattened free end portion 30 with rounded edges.
  • the micro-protuberances 16 are obtained by embossing the lower fold 14 by means of an embossed embossing cylinder 32, part of the convex cylindrical outer surface 34 is schematically illustrated in particular in FIG. figure 3 .
  • the surface 34 comprises a series of pins 36 formed in relief and whose shape or external profile is homologous to that which one wishes to obtain for each corresponding protrusion 16 of the fold 14 of the sheet 10.
  • pins 36 which are adjacent to each other and which, in the example shown, are all of the same shape and dimensions. Insofar as they come within the scope of the invention, it is possible to provide pins of different shapes.
  • Each pin 36 is constituted by a base 38 in the form of truncated pyramid with a rectangular base and a free end or end portion 40 which is flattened.
  • each pin 36 is delimited by two small sides 42 or widths 42, which are here parallel to the transverse direction CD and by two long sides 44 (or lengths 44) which are here parallel to the MD direction.
  • Each pin 36 is delimited laterally by two small opposite substantially trapezoidal faces 46 whose base is a short side 42, and two large opposite substantially trapezoidal faces 48 whose base is a long side 44.
  • each substantially trapezoidal lateral face 46, 48 is inclined with respect to the height, or central axis A, of the pin 36, of an angle alpha which is here equal to approximately 45 °, that is to say that the half the angle at the top of the base 38 in the form of truncated pyramid is here equal to 45 °.
  • the free end section, or vertex 40 is generally a substantially flat flat and perpendicular to the central axis A and it is connected to the triangular side faces 46 and 48 by rounded edges 50.
  • each pin 36 is equal to about 0.6 mm while the width 42 of its rectangular base is equal to 1.4 mm and the length 44 is equal to 1.8 mm.
  • the width of its top 40 which is generally rectangular in plan view and as can be seen in the figure 4 is about 0.2 mm while the length of the apex 40 is about 0.6 mm.
  • all the pins 36 are adjacent and are formed on the surface 34 in the form of series of pins aligned in the MD direction.
  • All the pins 36 of the same series are thus adjacent to each other by their widths 42 and they are adjacent to the pins of the following line by their lengths 44.
  • the pins 36 of a series are shifted in the operating direction, that is to say here in parallel with their length 44 by half a step, that is to say half the length 44 of the rectangular base of a pin 36, here 1.8 mm, two vertices 40 of two consecutive and aligned pins belonging to the same series being of course spaced 1.8 mm.
  • the density of the pins 36 is substantially equal to 40 pins per cm 2 .
  • the inclination of the lateral faces 46 and 48 can be accentuated by reducing the value of the angle alpha up to 30 °, this limit value remaining greater than the value of the half-angle at the top of a conventional frustoconical taper , much sharper.
  • the angle remains between 35 ° and 45 °.
  • the edges of the flat are rounded
  • the radius R of each rounded edge, or fillet 50 is for example here equal to 0.5 mm.
  • each pin 36 is generally identical to those mentioned above with reference to the first embodiment but the pins, as can be seen in FIG. figure 8 , are aligned by series of adjacent pins by their widths 42, and this in the crosswise direction CD of the engraved cylinder 32.
  • the dimensions of the apex or free end 40 may be larger.
  • each vertex, or free end may be a rectangular flat whose width is equal to 0.4 mm and the length to 0.8 mm, the radius R of each rounded edge 50 being here substantially equal to 0.1 mm while the height H and the other dimensions of the widths 42 and lengths 44 are unchanged.
  • the embossing of the background pattern that is to say the production of micro-protuberances 16 by means of one of the engraved cylinders of the type of those represented in FIGS. Figures 3 to 11 , is made with a moderate embossing pressure, that is to say by controlling the increase in total thickness of the fold 14 resulting from the embossing.
  • This increase is preferably less than or equal to the initial thickness of the fold 14, that is to say of the sheet of cellulose wadding creped before embossing.
  • this increase in height is less than half the thickness of the sheet.
  • the lower fold 14 has pins 16 whose height is between 0.05 mm and 0.5 mm.
  • the fold that has just been embossed to make the background pattern with micro-protuberances 16 is then embossed again to achieve the main pattern constituted by macro-protuberances in concentric circles 18.
  • the embossing pressure is then sufficient to allow the formation of curved annular zones between the concentric circles.
  • FIG 12 Diagrammatically shown in figure 12 an installation 60 for embossing and assembling with gluing of the two plies, upper 12 and lower 14, in order to produce the complex sheet 10.
  • the creped cellulose wadding sheet constituting the fold 12 passes firstly between a first etched cylinder 62 and an associated cylinder 64 for the realization of the embossing pattern of this fold 12.
  • the cylinder 64 may be rubber or similar coating, or with a rigid coating such as steel or paper, but it is then provided with cavities complementary to the protuberances of the engraved cylinder 62.
  • the sheet of cellulose wadding constituting the bottom fold 14 passes first into a micro-embossing unit 66 comprising the engraved cylinder 32, the convex cylindrical surface of which is engraved 34 in accordance with the teachings of the invention and which cooperates with an associated cylinder 68 for producing the bottom pattern comprising the micro-protuberances 16.
  • a micro-embossing unit 66 comprising the engraved cylinder 32, the convex cylindrical surface of which is engraved 34 in accordance with the teachings of the invention and which cooperates with an associated cylinder 68 for producing the bottom pattern comprising the micro-protuberances 16.
  • the cylinder 68 is made of rubber.
  • the fold 14 with its micro-embossing 16 then passes between a third engraved cylinder 70 whose etching pattern corresponds to the formation of concentric circle macro-protuberances 18 and which cooperates with an associated rubber cylinder 72.
  • the lower fold 14 with its micro-graufrage 16 and macro-embossing 18 then passes next to the upper engraved roll 62 to allow the combination of the two folds, before passing before a sizing cylinder 74 belonging to a unit 76 sizing, of known design, which deposits the glue on the vertices of the highest level relative to the cylinder 70.
  • the visual appearance obtained for the fold comprising the micro-embossed background pattern and the main pattern of macro-embossed decoration is significantly improved compared to a product of the state of the art without the background pattern.
  • the method has been applied to a main pattern composed of protuberances forming concentric circles.
  • the background pattern occupies the space between the circles and other concentric elements.
  • the space between two adjacent protuberances on the circles themselves is insufficient to accommodate a micro-protuberance.
  • a product whose surface seen from the background pattern side has the appearance of concentric relief rings forming toric bearings.
  • the first line gives the values of a sheet with two non-embossed folds. These are the reference values. The measurements were made according to standard standards in this area.
  • the second line gives the values of a product A of the prior art whose two plies were embossed with the single main pattern.
  • This is a paper towel marketed under the brand "Okay” in France and having a pattern composed of concentric circles as in the figure 2 but without the background pattern.
  • the macro-protuberances are an average of 7.6 per cm 2 .
  • the third line gives the values of a product B produced in accordance with the invention, that is to say with the same main embossing pattern as the product A above and the same embossing conditions, but also with the pattern background according to the invention, distributed as in the figure 2 and having 40 micro-protuberances per cm 2 .
  • the cross-directional wet strength of a product having bottom embossing consisting of micro-protuberances obtained on a cylinder whose pips are frustoconical in shape with an apex angle slightly less than 30 ° was first measured.
  • the density of the pins of the background pattern was 37 per cm 2 .
  • the values are respectively 77, 67 and 75 N / m. It is therefore found that the invention makes it possible to produce a product with a main pattern and a background pattern without harming its strength.
  • a sheet according to the invention is less rigid than a sheet with a simple main embossing pattern. Rigidity can be estimated by means of a consumer panel test or using a model based on appropriate physical parameter measurements.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Laminated Bodies (AREA)
EP00403285.0A 2000-11-24 2000-11-24 Feuille de papier absorbant crêpé, cylindre pour le gaufrage et procédé de fabrication d'une telle feuille Expired - Lifetime EP1209289B1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP00403285.0A EP1209289B1 (fr) 2000-11-24 2000-11-24 Feuille de papier absorbant crêpé, cylindre pour le gaufrage et procédé de fabrication d'une telle feuille
ES00403285.0T ES2547459T3 (es) 2000-11-24 2000-11-24 Hoja de papel absorbente crepado, rodillo para el estampado en relieve y proceso de fabricación de dicha hoja
PCT/FR2001/003583 WO2002042558A2 (fr) 2000-11-24 2001-11-15 Papier absorbant crepe
US10/181,977 US20030021953A1 (en) 2000-11-24 2001-11-15 Absorbent creped paper sheet comprising a background pattern and a main decorative pattern, and embossing roll and method for making such a sheet
CA002398309A CA2398309A1 (en) 2000-11-24 2001-11-15 Absorbent creped paper sheet comprising a background pattern and a main decorative pattern, and embossing roll and method for making such a sheet
NO20023221A NO332710B1 (no) 2000-11-24 2002-07-03 Absorberende, kreppet papirark omfattende et bakgrunnsmonster og et dekorativt hovedmonster samt pregevalse og fremgangsmate for fremstilling av et slikt ark
US11/860,179 US20080020180A1 (en) 2000-11-24 2007-09-24 Absorbent Creped Paper Sheet Comprising a Background Pattern and a Main Decorative Pattern, and Embossing Roll and Method for Making Such a Sheet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00403285.0A EP1209289B1 (fr) 2000-11-24 2000-11-24 Feuille de papier absorbant crêpé, cylindre pour le gaufrage et procédé de fabrication d'une telle feuille

Publications (2)

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EP1209289A1 EP1209289A1 (fr) 2002-05-29
EP1209289B1 true EP1209289B1 (fr) 2015-09-09

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EP00403285.0A Expired - Lifetime EP1209289B1 (fr) 2000-11-24 2000-11-24 Feuille de papier absorbant crêpé, cylindre pour le gaufrage et procédé de fabrication d'une telle feuille

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US (2) US20030021953A1 (es)
EP (1) EP1209289B1 (es)
CA (1) CA2398309A1 (es)
ES (1) ES2547459T3 (es)
NO (1) NO332710B1 (es)
WO (1) WO2002042558A2 (es)

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Also Published As

Publication number Publication date
WO2002042558A2 (fr) 2002-05-30
NO20023221D0 (no) 2002-07-03
NO332710B1 (no) 2012-12-17
US20080020180A1 (en) 2008-01-24
WO2002042558A3 (fr) 2002-09-06
US20030021953A1 (en) 2003-01-30
CA2398309A1 (en) 2002-05-30
EP1209289A1 (fr) 2002-05-29
ES2547459T3 (es) 2015-10-06
NO20023221L (no) 2002-09-13

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