EP0679122B1 - Verfahren zur herstellung einer prägefolie aus einer oder mehreren schichten - Google Patents

Verfahren zur herstellung einer prägefolie aus einer oder mehreren schichten Download PDF

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Publication number
EP0679122B1
EP0679122B1 EP94904672A EP94904672A EP0679122B1 EP 0679122 B1 EP0679122 B1 EP 0679122B1 EP 94904672 A EP94904672 A EP 94904672A EP 94904672 A EP94904672 A EP 94904672A EP 0679122 B1 EP0679122 B1 EP 0679122B1
Authority
EP
European Patent Office
Prior art keywords
sheet
cylinders
embossing
cylinder
plies
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94904672A
Other languages
English (en)
French (fr)
Other versions
EP0679122A1 (de
Inventor
Rémy Ruppel
Pierre Laurent
Joel Hungler
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
Fort James France
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fort James France filed Critical Fort James France
Publication of EP0679122A1 publication Critical patent/EP0679122A1/de
Application granted granted Critical
Publication of EP0679122B1 publication Critical patent/EP0679122B1/de
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
    • 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
    • B31F2201/0741—Roller cooperating with a non-even counter roller
    • B31F2201/0743—Roller cooperating with a non-even counter roller having a matching profile
    • 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
    • B31F2201/0787—Applying adhesive
    • 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security 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
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
    • Y10T156/1007—Running or continuous length work
    • Y10T156/1023—Surface deformation only [e.g., embossing]
    • 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
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1702—For plural parts or plural areas of single part
    • Y10T156/1712—Indefinite or running length work
    • Y10T156/1737—Discontinuous, spaced area, and/or patterned pressing
    • 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
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1702—For plural parts or plural areas of single part
    • Y10T156/1712—Indefinite or running length work
    • Y10T156/1741—Progressive continuous bonding press [e.g., roll couples]
    • 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.]
    • Y10T428/24628—Nonplanar uniform thickness material
    • Y10T428/24669—Aligned or parallel nonplanarities

Definitions

  • the invention relates to the field of fibrous products, including sanitary and household papers, wadding cellulose. It relates to a method of embossing a sheet with one or several folds in order for use as toilet paper, towel or paper towel in particular.
  • US Patent 3940529 describes an absorbent two-ply product.
  • the folds each have a pattern made by embossing with depressed areas and raised areas.
  • the raised areas on a fold are arranged between the raised areas of the other fold, and the connection is made by mechanical welding sides between the bottom and the top of the reliefs. This mechanical welding results in a loss of mechanical strength with perforation of the sheet at this level.
  • the installation includes two metallic embossing cylinders, provided with reliefs or pimples, meshing with each other.
  • the spacing between the elementary reliefs is less than their width so that the sheet is strongly compressed along the sides of these reliefs, and welded.
  • Patent application EP A 499 942 describes an embossed sheet comprising protuberances on one side, the thickness of the sheet being the smallest at the level of the foot of the protuberances.
  • US Patent 4,325,773 describes a method of assembling two plies where the latter have been previously embossed separately.
  • the two embossing cylinders, meshing one in the other, ensure the association of the folds.
  • the pattern of embossing consists of elongated reliefs relatively spaced from each other other.
  • US Patent 4,759,967 describes an embossing method for a multiple sheet consisting in bonding the plies together beforehand by means of an adhesive spray then to emboss the sheet between two metallic embossing cylinders.
  • the embossing pattern on the cylinders consists of alternating cavities with raised areas by relation to the plane of the surface.
  • the two cylinders mesh with each other, the reliefs of a cylinder engaging in the cavities of the second. It should be noted that these cylinders have been engraved together.
  • the thickness e1 at the ply bonding areas is less than that e2 of the zones, intermediate between two bonding zones, which form pockets of air.
  • the subject of the invention is a method of manufacturing by embossing a sheet of at least one fold in which it is engaged between two metal cylinders provided protuberances. rotated by means known per se, and meshing one inside the other with a clearance e1 between the top of the protuberances of a cylinder and the surface of the cylinder opposite, and a clearance e2 between the sides of two adjacent protuberances.
  • This process is characterized in that e1 and e2 are determined in the cross direction with respect to the machine direction in such a way that the ratio e1 / e2 is between 0.8 and 1.
  • a sheet is obtained which combines the advantage a rubber / steel embossing and a steel / steel embossing that is to say a sheet whose thickness is substantially uniform, while presenting an improved softness by the effect of calendering produced on the top of the raised areas of the sheet.
  • one make a sheet with at least two folds by bringing at least one of the two folds to match the surface of one of the cylinders by applying it by means of a rubber cylinder.
  • the game e1 is between 5/100 and 5/10 mm and corresponds at most to the sum of the thicknesses folds constituting the sheet.
  • a sheet at least two folds which, compared to a sheet of the prior art of the nested type, "nested", can include a number of larger bosses. This results in better resistance to the crash.
  • diameter rollers can be obtained lower for the same sheet length, which reduces the storage volume.
  • the calendering effect produced by the contact with the two metal cylinders provides softness touch.
  • the number of protrusions is greater than 12 per cm 2 .
  • Figure 1 shows, in cross section, a sheet 1 of the prior art with two folds 2 and 3 nested one inside the other.
  • the method of manufacturing such a sheet is taught for example in US patent 3556907.
  • the fold 2 has bosses 4 obtained by embossing. these bosses are regularly spaced from each other others and facing fold 3 which also has bosses 5, facing the fold 2. These are nested between the bosses 4. The spacing between bosses 4 and 5 is sufficient to create a gap 6 between them.
  • the thickness of the sheet varies between a minimum value e1 to where the bosses of a fold are in contact with the fold opposite, and an e2 value between two adjacent bosses.
  • the e1 / e2 ratio is low, of the order of 0.1.
  • e1 corresponds the thickness of the 2 folds of absorbent crepe paper, by example 0.2 mm and e2 was measured at 1.85 mm.
  • Figure 2 shows the embossing interval of two cylinders, in section in the plane passing through the axis of the two cylinders.
  • the metal cylinder 7 has radial projections 8 evenly distributed on the surface: likewise the 7 'cylinder has projections 8 'of the same dimension.
  • the usual technique of engraving a pair of such cylinders consists in engraving a first cylinder by means of a wheel in one harder material than that of the cylinder. Once this first cylinder made, the second cylinder is engraved using the first so as to obtain two conjugate patterns which overlap perfectly one in the other.
  • FIG. 3 An installation has been shown diagrammatically in FIG. 3 embossing 10 of a single-ply sheet or multiple sheet previously linked, with two cylinders 11, 12 arranged in parallel and driven by conventional means in the sense arrows. Cylinders 11, 12, metallic or another equivalent material, are provided, on the surface, with pins 13, 14, extending radially outward.
  • the cylinders are positioned relative to each other by so as to mesh with each other, the pins 13 of the cylinder 11 coming to be placed between the pins 14 of cylinder 12 in the embossing interval.
  • Sheet 15 of crepe paper is engaged between cylinders 11 and 12 and emerges by presenting on each face of the bosses corresponding to the pins of the cylinders.
  • Figure 4 is an enlarged view of a section made by a plane passing through the axis of the two cylinders and represents a configuration of the pins according to the invention.
  • the pins are identical on the two cylinders and are distributed in the same pattern with walking directions, respectively cross direction, identical.
  • the walking direction is that of the sheet scroll direction; the creping lines him are perpendicular.
  • We define the cross direction as forming a plus or minus 45 ° angle to the perpendicular to the direction market.
  • the pattern has a cross direction perpendicular to the running direction.
  • the pins have a height of between 0.5 and 1.5 mm.
  • the embossing interval between the two cylinders is equal to e1 between the top of the pins 13 of the first cylinder and the bottom of the engraving between the two adjacent pins 14 of the second cylinder. It is equal to e2 between the sides of two adjacent pins 13 and 14.
  • the pins are symmetrical by relative to their axis.
  • the clearance e1 is a function of the spacing that has been set between the two cylinders.
  • the value of the e2 game depends on the geometric parameters of the pins. So, for a step P of the pattern given, it is a function of the apex angle ⁇ of the pins as well as of their width L at the top. In practice the angle ⁇ is understood between 25 and 35 ° and the width at the top is 0.1 and 1.2 mm.
  • e1 and e2 are determined so that the ratio e1 / e2 is less than or equal to 1 and greater than 0.8.
  • the value e1 will be chosen at most equal to the thickness of the embossing sheet. This ensures calendering of the sheet at the top of the bosses obtained, providing a improved softness to the touch.
  • FIG. 5 shows an embossing installation for the formation of a two-ply sheet.
  • This installation in itself of the conventional type comprises two cylinders 111, 112, made of metal or in an equivalent material, arranged in parallel and driven by conventional means in the direction of the arrows.
  • the cylinders 111 and 112 are provided with pins 113, 114 extending radially outwards and meshing with each other.
  • a pressure cylinder 119, 120 to rubber coating, or other elastomeric material, is associated to each of the cylinders 111 and 112.
  • crepe paper 115, 115 ′ Two folds of crepe paper 115, 115 ′ are engaged respectively between the cylinders 111 and 119, and 112 and 120 and are pressed on their respective embossing cylinder whose relief they espouse.
  • a gluing device 121 also known per se, deposits an adhesive substance on the vertices of the raised areas of fold 115, then the two folds are entrained in the embossing interval between the two cylinders 111 and 112 where they join in a leaf.
  • This sheet 115-115 ' is then transformed into a finished product such as for example household paper towel.
  • FIG. 6 represents an enlarged view of a section made along a plane passing through the axis of the two cylinders 111 and 112.
  • the two folds 115, 115 ' substantially follow the outline of pins 113 and 114 respectively.
  • the clearance between the two cylinders is equal to e1 between the peaks of the spikes and the bottom of the engraving facing it. he is equal to e2 at the flanks.
  • determine the clearance e1 so that it is at most equal to the thickness of the two folds so as to ensure on the one hand the bonding by gluing at this level, on the other hand, a calendering action.
  • the geometry of the pins is determined so that the ratio e1 / e2 is between 0.8 and 1. This ensures the formation of a sheet, where the air pocket is reduced.
  • FIG. 7 shows an embodiment of a 3-ply sheet. The installation is similar to that of the figure 5. Each common element has been designated by the same reference. She includes an additional sizing machine 122 and a supply of 115 '' paper.
  • Each of the glueers 121, 122 deposits an adhesive substance on at least part of the tops of the reliefs of the folds 115 and 115 '. These are applied against the metal cylinders 111 and 112 by means of the rubber cylinders 119, 120.
  • the two folds 115, 115 ' are driven in the direction of the arrows as far as the engagement interval of the two cylinders 111 and 112.
  • a third fold 115 '' is drawn between the two folds 115, 115 'at time of their engagement in said interval.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Laminated Bodies (AREA)
  • Paper (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Sanitary Thin Papers (AREA)

Claims (7)

  1. Verfahren zum Prägen eines Kreppapier-Bogens aus mindestens einer Schicht, bei dem der Bogen zwischen zwei mit Vorsprüngen versehenen metallischen Zylindern eingeführt wird, welche durch an sich bekannte Mittel drehbar angetrieben werden, wobei sie mit einem Spiel e1 zwischen der Oberseite der Vorsprünge eines Zylinders und der gegenüberliegenden Fläche des anderen Zylinders und einem Spiel e2 zwischen den Flanken zweier benachbarter Vorsprünge miteinander in Eingriff treten, dadurch gekennzeichnet, daß e1 und e2 in einer Richtung quer zur Papierabwickelrichtung so bestimmt werden, daß das Verhältnis e1/e2 zwischen 0,8 und 1 liegt.
  2. Verfahren zum Prägen nach Anspruch 1, dadurch gekennzeichnet, daß e1 und e2 in Papierabwickelrichtung so bestimmt werden, daß das Verhältnis e1/e2 zwischen 0,2 und 1 und vorzugsweise zwischen 0,2 und 0,5 liegt.
  3. Verfahren zum Prägen eines Bogens aus mindestens zwei Schichten nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß mindestens einer der beiden Schichten vorher eine Form entsprechend der Oberfläche eines der Zylinder verliehen wird, indem sie mit Hilfe eines mit Kautschuk beschichteten Zylinders gegen diesen angedrückt wird.
  4. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die beiden Schichten getrennt mit Hilfe von kautschukbeschichteten Zylindern gegen die metallischen Zylinder angedrückt werden.
  5. Verfahren nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß eine klebende Substanz auf mindestens einen Abschnitt der reliefartigen Bereiche aufgetragen wird, ehe die Schichten zwischen die beiden metallischen Zylinder eingeführt werden.
  6. Verfahren zum Prägen eines Kreppapierbogens nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Spiel e1 zwischen 5/100 und 5/10 mm liegt und höchstens der Summe aus den Dickenwerten der den Bogen bildenden Schichten entspricht.
  7. Verfahren zum Prägen nach dem vorhergehenden Anspruch, dadurch gekennzeichnet, daß die Anzahl der Vorsprünge größer als 12 pro cm2 ist.
EP94904672A 1993-01-15 1994-01-13 Verfahren zur herstellung einer prägefolie aus einer oder mehreren schichten Expired - Lifetime EP0679122B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9300366 1993-01-15
FR9300366A FR2700496B1 (fr) 1993-01-15 1993-01-15 Procédé de gaufrage d'une feuille à un ou plusieurs plis, feuille de papier gaufré.
PCT/FR1994/000042 WO1994015776A1 (fr) 1993-01-15 1994-01-13 Procede de gaufrage d'une feuille a un ou plusieurs plis, feuille de papier gaufre

Publications (2)

Publication Number Publication Date
EP0679122A1 EP0679122A1 (de) 1995-11-02
EP0679122B1 true EP0679122B1 (de) 1998-08-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP94904672A Expired - Lifetime EP0679122B1 (de) 1993-01-15 1994-01-13 Verfahren zur herstellung einer prägefolie aus einer oder mehreren schichten

Country Status (7)

Country Link
US (1) US5686168A (de)
EP (1) EP0679122B1 (de)
AT (1) ATE169862T1 (de)
DE (1) DE69412585T2 (de)
ES (1) ES2121186T3 (de)
FR (1) FR2700496B1 (de)
WO (1) WO1994015776A1 (de)

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US20100028621A1 (en) * 2008-08-04 2010-02-04 Thomas Timothy Byrne Embossed fibrous structures and methods for making same
US20100030174A1 (en) * 2008-08-04 2010-02-04 Buschur Patrick J Multi-ply fibrous structures and processes for making same
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US20100297395A1 (en) * 2009-05-19 2010-11-25 Andre Mellin Fibrous structures comprising design elements and methods for making same
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Also Published As

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ES2121186T3 (es) 1998-11-16
DE69412585D1 (de) 1998-09-24
DE69412585T2 (de) 1999-01-07
WO1994015776A1 (fr) 1994-07-21
US5686168A (en) 1997-11-11
FR2700496A1 (fr) 1994-07-22
EP0679122A1 (de) 1995-11-02
ATE169862T1 (de) 1998-09-15
FR2700496B1 (fr) 1995-02-17

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