EP2191959B1 - Unité de gaufrage-stratification et procédé de gaufrage - Google Patents

Unité de gaufrage-stratification et procédé de gaufrage Download PDF

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Publication number
EP2191959B1
EP2191959B1 EP09425478.6A EP09425478A EP2191959B1 EP 2191959 B1 EP2191959 B1 EP 2191959B1 EP 09425478 A EP09425478 A EP 09425478A EP 2191959 B1 EP2191959 B1 EP 2191959B1
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EP
European Patent Office
Prior art keywords
embossing
roller
protuberances
laminating
ply
Prior art date
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Active
Application number
EP09425478.6A
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German (de)
English (en)
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EP2191959A1 (fr
Inventor
Emi Stefani
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.)
Sofidel SpA
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Delicarta SpA
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Priority to PL09425478T priority Critical patent/PL2191959T3/pl
Publication of EP2191959A1 publication Critical patent/EP2191959A1/fr
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Publication of EP2191959B1 publication Critical patent/EP2191959B1/fr
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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
    • B31F2201/0738—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
    • B31F2201/0707—Embossing by tools working continuously
    • B31F2201/0715—The tools being rollers
    • B31F2201/0741—Roller cooperating with a non-even counter roller
    • B31F2201/0748—Roller cooperating with a non-even counter roller having a dissimilar 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
    • B31F2201/0771—Other aspects of the embossing operations
    • B31F2201/0774—Multiple successive embossing 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

Definitions

  • the present invention relates to machines and methods for the converting of web materials, in particular for converting or processing paper, such as so-called tissue paper for the production of toilet paper, kitchen towels, napkins or other products in absorbent paper.
  • tissue paper i.e. a paper commonly used for the production of absorbent products, such as toilet paper, kitchen towels or the like, napkins and other products.
  • embossing roller provided with protuberances
  • a pressure roller can be a roller engraved with an embossing pattern complementary to that of the protuberances of the embossing roller, so that the embossing roller and the pressure roller mesh with one another.
  • the pressure roller is a roller coated with a yielding material, for example rubber, and in this case embossing is obtained by making the embossing protuberances of the embossing roller penetrate in the elastically yielding coating layer of the pressure roller.
  • the paper ply or plies passed in the nip between the embossing roller and the pressure roller are subjected to a permanent deformation, which entails the formation of a raised embossing pattern on the ply, corresponding to the pattern defined by the protuberances of the embossing roller. Projections and cavities are therefore formed on the ply, corresponding to the cavities and to the projections of the embossing roller.
  • embossing-laminating units are used, i.e. units suitable to carry out embossing on one or more plies and subsequently to bond the processed plies to one another.
  • embossing and lamination are carried out according to a so called tip-to-tip technique, according to which the two plies separately embossed between two embossing rollers and two corresponding pressure rollers, are laminated and bonded by gluing, after having applied a glue on at least one of the plies, by passing them through a nip defined by the first and by the second embossing roller, in this nip at least some of the protuberances of the first roller being in correspondence of protuberances of the second roller.
  • the protuberances corresponding to each other exert a laminating pressure between the two plies where the glue has been applied, so that bonding by gluing is obtained.
  • the two plies embossed separately by two embossing rollers and two corresponding pressure rollers are glue-bonded by means of a so-called laminating roller, which cooperates with one of the embossing rollers.
  • a so-called laminating roller which cooperates with one of the embossing rollers.
  • an embossing generally of the so called nested type is obtained, i.e. wherein the embossing projections of one ply enter in the cavities between the embossing projections of the other ply.
  • the laminating roller is usually a roller with a flat surface, made of a relatively hard material, such as a very hard rubber, or a metallic roller.
  • a glue dispenser is associated to the embossing roller, with which the pressure or laminating roller cooperates.
  • the laminating roller presses the two plies against the embossing protuberances of the embossing roller to which it is associated.
  • the effect is obtained of a substantial compression of the multi-ply web product, with a partial damage of the embossing motifs obtained during the previous embossing phase between each embossing roller and the corresponding pressure roller.
  • US 4,483,728 discloses an embossing-laminating unit comprising a first embossing roller cooperating with a first pressure roller, a second embossing roller cooperating with a second pressure roller, the two embossing rollers being provided with embossing protuberances to separately emboss two plies in tissue paper.
  • the embossing-laminating unit described in the mentioned prior patent document furthermore has a glue dispenser, associated with the second embossing roller, which applies glue on the protuberances generated on the second ply by the protuberances of the second embossing roller.
  • a laminating roller is associated that, contrary to what normally occurs, is provided with projections.
  • the laminating roller defines with the second embossing roller a lamination nip, through which the two embossed plies pass.
  • the two plies, previously provided with respective embossing motifs are pressed by the protuberances of the laminating roller.
  • the lamination is limited to the surface of the protuberances of the laminating roller, instead of being on the entire surface of the protuberances of the second embossing roller, as occurs in the embossing-laminating units of the traditional type.
  • the two previously embossed plies are at least partially pressed in the areas on which the protuberances of the laminating roller act.
  • the present invention provides for a laminating-embossing unit which allows to obtain a better processing of the web material, maintaining the embossing unchanged, or substantially reducing the alteration of the embossing generated before lamination.
  • the invention provides for an embossing and laminating method which allows to reduce the damage caused by the laminating roller to the embossing of the two plies, or groups of plies, before lamination.
  • an embossing-laminating unit comprising: a first embossing roller provided with a series of first embossing protuberances; a first pressure roller, cooperating with said first embossing roller to emboss a first ply of web material; a second embossing roller provided with a series of second protuberances; a second pressure roller, cooperating with said second embossing roller to emboss a second ply of web material; a glue dispenser, cooperating with said first embossing roller; a laminating roller, cooperating with said second embossing roller.
  • the laminating roller is provided with protuberances in phase with at least some of the first protuberances of the first embossing roller in order to generate a laminating effect in correspondence of areas of the first ply embossed by the first embossing roller. In this way a lamination is obtained between plies of the web material without compression or in any way with a lower effect of compression of the embossing pattern of the plies.
  • first and the second embossing rollers are synchronized in a nested arrangement, with the protuberances of the first embossing roller phased with cavities between protuberances of the second embossing roller.
  • the protuberances of the laminating roller have a greater height than the protuberances of the second embossing roller and preferably also than the protuberances of the first embossing roller.
  • the invention relates to a method for embossing and bonding plies of web material according to claim 5, comprising the steps of:
  • Each ply can be formed by an individual layer or by a plurality of layers, made of cellulose based fibers, for example.
  • Figure 1 schematically shows a possible embodiment of an embossing-laminating unit according to the present invention.
  • the embossing-laminating unit indicated as a whole with number 1, comprises a first embossing roller 3 provided ( figure 1A ) with first embossing protuberances 3P.
  • the protuberances 3P can define an embossing motif or pattern of various type, for example used to impart particular technical-functional characteristics and/or a particularly pleasant appearance to the product.
  • the first embossing roller 3 cooperates with a first pressure roller 5.
  • the pressure roller 3 is coated with a layer 5A made of an elastically yielding material, such as for example rubber.
  • the glue dispenser 7 applies a glue on all or some of the projections generated on a first ply V1, made of paper or other ply material, embossed between the pressure roller 5 and the embossing roller 3.
  • the glue can be applied on all the projections, or, by using a glue dispenser 7 of a particular shape, only on some of the projections formed on the web material. This can be obtained for example by means of a cliched glue dispenser, i.e. a dispenser having a pattern on the surface thereof one.
  • the embossing-laminating unit 1 further comprises a second embossing roller 9, the axis of rotation 9A of which is substantially parallel to the axis of rotation 3A of the first embossing roller 3.
  • the second embossing roller 9 has, on its own surface, embossing protuberances indicated with 9P (see detail of figure 1B ).
  • the second embossing roller 9 cooperates with a second pressure roller 11.
  • the second pressure roller 11 can be coated with a layer 11 A of an elastically yielding material such as for example rubber, similarly to what has been described with reference to the first pressure roller 5.
  • a second ply V2 is fed, which is embossed between the second embossing roller 9 and the second pressure roller 11, similarly to what occurs to the first ply V1 in the embossing nip between the first pressure roller 5 and the first embossing roller 3.
  • the embossing rollers 3 and 9 are arranged with their respective axes 3A and 9A at such a distance that they do not touch each other in the nip 13 formed between the rollers.
  • the first embossed ply V1 is detached from the first embossing roller 3 and placed on the second embossing roller 9 as schematically represented in figure 2 .
  • the embossing protuberances 3P and 9P are preferably arranged so that the projections S1 formed by embossing on the ply V1 enter in cavities formed between projections S2 generated on the second ply V2, as shown in particular in the enlargement of figure 2A .
  • this lamination is obtained by providing a laminating roller 15, cooperating with the second embossing roller 9 and provided with protuberances 15P, as shown in particular in the enlargement of figure 1C .
  • the protuberances 15P are arranged in such a manner that, with an adequate synchronism between the rotation of the embossing roller 3 and of the laminating roller 15, they enter between adjacent protuberances 9P ( figure 2A ) of the second embossing roller 9, at the projections S1 of the ply V1 provided with glue C.
  • the laminating pressure between the two plies V1 and V2 is substantially concentrated in the valleys between protuberances 9P of the second embossing roller, where there are the areas of the first ply V1, on which the glue C has been applied.
  • the pressure is not exerted on the protuberances 9P of the embossing roller to which the laminating roller is associated, but at the cavities of that roller, or at least in some of said cavities, corresponding to the projections S1 of the ply V1 which have received the glue.
  • the laminating roller 15 has therefore protuberances 15P phased with protuberances 3P of the first embossing roller 3.
  • the laminating roller 15 and the glue dispenser 7 are associated to two different embossing rollers: in the illustrated example the glue dispenser 7 is associated to the first embossing roller 3, whilst the laminating roller 15 is associated to the second embossing roller 9. Also an inverse arrangement is possible.
  • the laminating roller acts against the embossing roller to which the glue dispenser is associated, this due to the fact that the traditional laminating unit acts on the protuberances of the embossing roller, to which it is associated, on which the glue has been applied.
  • a lamination of the two plies V1 and V2 is obtained by means of a application of pressure which does not damage the embossing, whilst generally the pressure of the laminating roller is exerted on the protuberances 9P of the embossing roller 9 with consequent at least partial compression of the previously generated embossing pattern.
  • the height H ( figure 2A ) of the protuberances 15B of the laminating roller 15 is greater than the height h of the protuberances 9B of the second embossing roller 9, and this further reduces the risk of damage resulting from the compression of the embossing pattern generated by the embossing rollers 3, 9 and by the corresponding pressure rollers 5, 11.
  • Figure 3 schematically shows a cross section of web material manufactured by means of the device and the method described herein.
  • the projections S1 generated on the ply V1 are of greater dimensions and more distanced from one another than the projections S2 generated on the ply V2, although this is not strictly necessary.
  • the projections S1 impart a decorative pattern to the product, whilst the projections S2 form a background embossing which is dense and of small dimensions.
  • dimensions and/or density of the protuberances S1, S2 can be substantially similar on the two plies, or an inverse arrangement relative to that illustrated.
  • the two embossing rollers 3 and 9 are phased, i.e. they are synchronized with a nested arrangement: the protuberances 3P are arranged, relative to the protuberances 9P, so that the projections S1 formed on the ply V1 enter in the cavities between projections S2 of the ply V2.
  • this is only one possible embodiment of the method and of the device according to the present invention.
  • Figure 4 schematically shows, in an intermediate phase of processing, a web material N obtained with a different arrangement and phasing of the projections S1 of the ply V1 and S2 of the ply V2.
  • some of the projections S1, S2, indicated here with S1(X) and S2(X) are in a tip-to-tip arrangement, i.e. one corresponding to the other.
  • These projections correspond to protuberances of the embossing rollers arranged in a tip-to-tip arrangement in the embossing nip 13.
  • Other projections, indicated with S1(Y) and S2(Y) are arranged in a nested arrangement.
  • C indicates the glue applied by the glue dispenser 7 on the projections S1, S1(X), S1(Y) of the ply V1.
  • the section represented in figure 4 shows the web material in an intermediate processing phase, before it enters the lamination nip between the embossing roller 9 and the laminating roller 15.
  • the rollers are not shown in figure 4 , but it must be understood that the ply V2 is engaged with the embossing roller 9, and therefore inside the projections S2 there are the protuberances 9P of the embossing roller 9 and the whole ply V2 is in contact with and engaged with the surface of the embossing roller 9.
  • the ply V1 has been detached from the embossing roller 3 and put on the ply V2, in order to pass in the lamination nip between the rollers 15 and 9.
  • the protuberances 15P of the laminating roller 15 will enter at the arrows 15X so as to exert the laminating pressure which glues the projections S1(Y) inside the cavities between projections S2(Y) of the ply V2.
  • a mixed product is thus obtained, embossed partially in a tip-to-tip arrangement and partially in a nested arrangement.
  • a laminating roller 15 according to the present invention a reduction or an elimination of the compression of the embossing pattern, previously imparted to the plies V1 and V2 by the embossing rollers 3 and 9 and the corresponding pressure rollers 5 and 11, is achieved.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Credit Cards Or The Like (AREA)
  • Making Paper Articles (AREA)

Claims (6)

  1. Unité de gaufrage-stratification, comprenant :
    - un premier rouleau de gaufrage (3) pourvu d'une série de premières protubérances de gaufrage (3P);
    - un premier rouleau de pression (5), coopérant avec le premier rouleau de gaufrage (3) pour gaufrer un premier pli (V1) de matériau de tissu, en générant des saillies (S1) sur le premier pli (V1) ;
    - un deuxième rouleau de gaufrage (9) pourvu d'une série de deuxièmes protubérances de gaufrage (9P);
    - un deuxième rouleau de pression (11), coopérant avec ledit deuxième rouleau de gaufrage (9) pour gaufrer un deuxième pli (V2) de matériau de tissu, en générant des saillies (S2) sur le deuxième pli (V2) ;
    - un distributeur de colle (7), coopérant avec ledit premier rouleau de gaufrage (3) pour appliquer de la colle sur toutes ou sur certaines des saillies (S1) générées sur le premier pli (V1);
    - un rouleau de stratification (15) pourvu de protubérances (15P),
    caractérisée en ce que : ledit rouleau de stratification (15) coopère avec ledit deuxième rouleau de gaufrage (9); et les protubérances (15P) dudit rouleau de stratification (15) sont en phase avec au moins certaines des protubérances (3P) du premier rouleau de gaufrage (3) de manière à générer un effet de stratification en correspondance avec des plages du premier pli (V1) gaufré par le premier rouleau de gaufrage (3).
  2. Unité de gaufrage-stratification telle que revendiquée dans la revendication 1, dans laquelle ledit premier et ledit deuxième rouleau de gaufrage (3, 9) sont mis en phase dans un arrangement emboîté, avec les protubérances (3P) du premier rouleau de gaufrage (3) en phase avec des cavités entre les protubérances (9P) du deuxième rouleau de gaufrage (9).
  3. Unité de gaufrage-stratification telle que revendiquée dans la revendication 1 ou 2, dans laquelle les protubérances (15P) du rouleau de stratification (15) présentent une hauteur (H) plus grande que la hauteur (h) des protubérances (9P) du deuxième rouleau de gaufrage (9).
  4. Unité de gaufrage-stratification telle que revendiquée dans la revendication 1, 2 ou 3, dans laquelle lesdites premières protubérances (3P) du premier rouleau de gaufrage (3) définissent un motif décoratif et lesdites deuxièmes protubérances (9P) du deuxième rouleau de gaufrage (9) définissent un motif d'arrière-plan.
  5. Procédé de gaufrage et de couplage de plis (V1, V2) de matériau de tissu, comprenant les étapes de :
    - gaufrer un premier pli (V1) entre un premier rouleau de pression (5) et un premier rouleau de gaufrage (3) pourvu de premières protubérances (3P);
    - gaufrer un deuxième pli (V2) entre un deuxième rouleau de pression (11) et un deuxième rouleau de gaufrage (9) pourvu de deuxièmes protubérances (9P);
    - appliquer une colle (C) sur au moins certaines des saillies de gaufrage (S1) générées par le premier rouleau de gaufrage (3);
    - stratifier ledit premier pli (V1) et ledit deuxième pli (V2) entre ledit deuxième rouleau de gaufrage (9) et un rouleau de stratification (15) pourvu de protubérances de stratification en phase avec au moins certaines des premières protubérances (3P) du premier rouleau de gaufrage (3).
  6. Procédé tel que revendiqué dans la revendication 5, dans lequel lesdites premières protubérances (3P) et deuxièmes protubérances (9P) sont mises en phase de sorte que les premières protubérances (3P) du premier rouleau de gaufrage sont en correspondance avec des cavités entre les deuxièmes protubérances (9P) du deuxième rouleau de gaufrage (9).
EP09425478.6A 2008-11-25 2009-11-23 Unité de gaufrage-stratification et procédé de gaufrage Active EP2191959B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL09425478T PL2191959T3 (pl) 2008-11-25 2009-11-23 Zespół wytłaczająco-laminujący i sposób wytłaczania

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000229A ITFI20080229A1 (it) 2008-11-25 2008-11-25 "gruppo goffratore-laminatore e metodo di goffratura"

Publications (2)

Publication Number Publication Date
EP2191959A1 EP2191959A1 (fr) 2010-06-02
EP2191959B1 true EP2191959B1 (fr) 2016-01-27

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ID=41264195

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09425478.6A Active EP2191959B1 (fr) 2008-11-25 2009-11-23 Unité de gaufrage-stratification et procédé de gaufrage

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Country Link
EP (1) EP2191959B1 (fr)
ES (1) ES2562956T3 (fr)
IT (1) ITFI20080229A1 (fr)
PL (1) PL2191959T3 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8186296B2 (en) 2010-05-05 2012-05-29 The Procter & Gamble Company Methods and apparatus for applying adhesives in patterns to an advancing substrate
US9265672B2 (en) 2012-11-27 2016-02-23 The Procter & Gamble Company Methods and apparatus for applying adhesives in patterns to an advancing substrate
US9295590B2 (en) 2012-11-27 2016-03-29 The Procter & Gamble Company Method and apparatus for applying an elastic material to a moving substrate in a curved path
US9248054B2 (en) 2012-11-27 2016-02-02 The Procter & Gamble Company Methods and apparatus for making elastic laminates

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4483728A (en) 1980-07-14 1984-11-20 Kimberly-Clark Corporation Relieved patterned marrying roll
JP2002505207A (ja) * 1998-03-02 2002-02-19 フアビオ・ペリニ・ソシエタ・ペル・アチオーニ ウエブ加工材料を製造する方法及び装置とこの方法で作られた製品
CA2324786C (fr) * 1999-11-01 2014-02-25 Fort James Corporation Produit en papier absorbant multicouches a motifs imprimes
WO2007107167A1 (fr) * 2006-03-17 2007-09-27 Sca Hygiene Products Gmbh Procede de production d'un produit en papier multicouche, produit en papier hygienique et appareil de production d'un produit en papier multicouche

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Publication number Publication date
ES2562956T3 (es) 2016-03-09
PL2191959T3 (pl) 2016-07-29
EP2191959A1 (fr) 2010-06-02
ITFI20080229A1 (it) 2010-05-26

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