EP2228208B1 - A paper material with an improved embossed pattern and method for the production thereof - Google Patents

A paper material with an improved embossed pattern and method for the production thereof Download PDF

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Publication number
EP2228208B1
EP2228208B1 EP10006232.2A EP10006232A EP2228208B1 EP 2228208 B1 EP2228208 B1 EP 2228208B1 EP 10006232 A EP10006232 A EP 10006232A EP 2228208 B1 EP2228208 B1 EP 2228208B1
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EP
European Patent Office
Prior art keywords
ply
embossed
protuberances
embossing
sheet material
Prior art date
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EP10006232.2A
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German (de)
English (en)
French (fr)
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EP2228208A1 (en
Inventor
Emi Stefani
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Delicarta SpA
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Delicarta SpA
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Application filed by Delicarta SpA filed Critical Delicarta SpA
Priority to PL10006232T priority Critical patent/PL2228208T3/pl
Priority to SI200731385T priority patent/SI2228208T1/sl
Publication of EP2228208A1 publication Critical patent/EP2228208A1/en
Application granted granted Critical
Publication of EP2228208B1 publication Critical patent/EP2228208B1/en
Priority to CY20141100038T priority patent/CY1114758T1/el
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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
    • D21H27/30—Multi-ply
    • 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
    • B31F2201/0758—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
    • B31F2201/0758—Characteristics of the embossed product
    • B31F2201/0761—Multi-layered
    • B31F2201/0766—Multi-layered the layers being superposed tip to tip
    • 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
    • D21H27/002—Tissue paper; Absorbent paper

Definitions

  • the invention relates to improvements to embossed web materials, especially based on tissue paper, of the multi-ply type, i.e. comprising at least two plies bonded together, typically and preferably by gluing.
  • the invention also relates to improvements to the processing methods to emboss materials made of tissue paper or the like, to obtain new and improved functional characteristics.
  • the invention also relates to a method for the production of a material of this type.
  • Embossing is one of the operations that are normally performed on plies or sheets of tissue paper, to produce paper articles for personal and household cleaning and hygiene, and also for professional and industrial use, such as toilet paper, kitchen towels, paper napkins and handkerchiefs and the like.
  • Embossing is an operation that is performed for the dual purpose of improving aesthetic properties and increasing functional properties, in particular the softness, smoothness, absorption capacity or thickness of the finished material.
  • tissue paper material such as kitchen towel or toilet paper
  • a tissue paper material is produced from two or more plies of paper embossed separately and subsequently bonded together by applying a glue and laminating the plies between counter-rotating rollers defining a lamination nip.
  • Embossing is, for example, performed by feeding each ply between an embossing roller, provided with protuberances, and a pressure roller with an outer surface coated in yielding material, such as rubber or the like.
  • embossing is performed between two rollers made of steel or another hard material, one equipped with protuberances and the other with corresponding recesses.
  • the protuberances of the embossing roller produce corresponding protuberances or projections in the paper ply.
  • the protuberances formed in the two outermost plies are facing the inside of the finished product.
  • the two plies of paper web material are bonded by making at least some of the protuberances of one ply coincide with the protuberances of the other ply, having previously applied glue to the protuberances of one of the two plies, or to at least some of these protuberances.
  • two embossing rollers which emboss the two paper plies separately by means of respective pressure rollers, form therebetween a lamination nip, through which the two embossed plies are fed before being detached from the rollers.
  • the protuberances of one roller coincide with the protuberances of the other roller and the reciprocal distance between the rollers is such as to cause localized compression of the plies at said protuberances.
  • a tip-to-tip embossing unit to obtain a product of this type is described in US-A-3,414,459 . Further tip-to-tip embossing units are described in US-A-5,173,351 ; US-A-6,032,712 ; US-A-6,245,414 ; US-A-6,053,232 and US-A-3,961,119 .
  • the two plies are embossed separately, each between an embossing roller and a counter-roller or pressure roller, and then matched so that the protuberances of one ply are inserted between the protuberances of the other ply.
  • Lamination of the two plies to obtain reciprocal bonding is performed between one of the embossing rollers an a laminating roller, while the two embossing rollers do not normally touch. Examples of embossing-laminating devices of this type are described in US-A-3,556,907 ; US-A-3,867,225 ; US-A-5,339,730 .
  • US-A-5,686,168 describes a method of nested embossing, wherein the plies are bonded by lamination between two opposed embossing rollers.
  • US-A-6,578,617 and US-A-6,470,945 describe embossing units that can perform embossing according to both techniques, i.e. nested or tip-to-tip.
  • the reciprocal angular position and/or the reciprocal axial position of the two embossing rollers can be modified.
  • US-A-6,261,666 describes an analogous device for alternatively performing tip-to-tip or nested embossing. Another similar device is described in US-A-6,109,326 .
  • embossing was performed according to very simple geometric patterns, with uniform distribution of truncated-cone or truncated-pyramid shaped protuberances. These embossings had a prevalently technical function, and were used to produce a product of adequate thickness and with sufficient softness and absorption capacity.
  • embossing must increasingly achieve a dual function, both technical-functional and aesthetic. Therefore, embossing patterns and embossing devices have been developed which make it possible to obtain a product that is aesthetically pleasing and at the same time suitable to satisfy the aesthetic requirements and increasing commercial requirements demanded of these products. Examples of complex embossing patterns with a technical and aesthetic function are described in US-A-6,136,413 ; US-A-5,846,636 ; US-A-6,106,928 .
  • embossing tissue paper products has always been aimed at increasing the liquid absorption properties and apparent thickness of the product.
  • embossing was, and continues to be, utilized prevalently in the field of kitchen towels, more than in the field of toilet paper.
  • An object of the invention is to produce an embossing pattern that gives the tissue paper a different function from that of conventional products.
  • the invention relates to a method according to claim 1.
  • Glue is applied to some or all of the lines defining the bottom of the substantially linear grooves.
  • the areas of embossed ply forming the outwardly projecting protuberances are more resistant to compression, as the portion of outwardly projecting ply material of the web material is at least partly surrounded by lines of glue, which bond the material of the ply to the ply below, preventing the embossed ply material from collapsing.
  • This increased resistance to compression is useful both to preserve the form of the product wound in a roll, and to maintain the three-dimensional nature of the embossing pattern during use, e.g. when the product is passed over the surface to be cleaned exerting a certain amount of pressure.
  • the invention relates to a tissue paper according to claim 3.
  • Figure 1 shows a diagram of an embossing unit, also known as embossing-laminating unit, indicated as a whole with 2.
  • the unit comprises a first embossing roller 1 and a second embossing roller 3, rotating about respective rotation axes 1A and 3A. The directions of rotation are indicated with f1 and f3.
  • a nip G is defined between the two embossing rollers, through which two plies of tissue paper V1 and V3 are fed, which are separately embossed by the rollers 1 and 3, respectively.
  • Embossing takes place by feeding each of the plies between the respective embossing roller 1 or 3 and a corresponding pressure roller 5 or 7, the axes of rotation of which are indicated with 5A and 7A.
  • rollers 5 and 7 are coated with a layer of yielding material, such as rubber or the like, in which protuberances, indicated schematically and as a whole with 1 P and 3P in Figure 1 , with which the embossing rollers 1 and 3 are equipped penetrate. Possible configurations of these protuberances will be described in detail hereunder.
  • the two rollers 1 and 3 can be phased to position the protuberances 1 P and 3P in the tip-to-tip or nested configuration.
  • the first condition in the lamination nip G at least some of the protuberances of the roller 1 coincide with the protuberances of the roller 3 and the distance between the rollers 1 and 3 is such that sufficient pressure is exerted between the protuberances to cause lamination and bonding of the plies V1 and V3.
  • the protuberances 1 P are intercalated between the protuberances 3P.
  • the unit When, on the other hand, the unit is two-purpose and can operate both in tip-to-tip and nested mode, the rollers are reciprocally positionable with angular and/or axial phasing.
  • the mechanical members and in particular the supports for the rollers 1 and 3 which allow adjustment are known per se and will not be described in greater detail herein.
  • a glue dispensing unit is indicated schematically with 17, and applies a glue to the radially projecting surfaces of the ply V1 embossed by the roller 1, when this ply is still engaged with the surface of said roller 1.
  • FIG. 2 schematically shows the conformation of a different possible embossing machine or unit, of the type described, for example, in WO-A-99/44414 .
  • the two plies of tissue paper again indicated with V1 and V3, are fed towards an embossing unit or embossing-laminating unit 100 comprising an embossing roller 101 equipped with protuberances 101 P and cooperating with a lamination or marrying roller 103, which can optionally be coated with a material which is softer, or more yielding than the material forming the surface of the embossing roller 105.
  • a glue dispenser 107 cooperates with the embossing roller 105 to apply glue to the protuberances produced through embossing by the projections 101P in the ply V1 through pressure between the embossing roller 101 and a pressure roller 109 coated in rubber or another yielding material.
  • the ply V1 before being guided about the pressure roller 109, the ply V1 is fed into a secondary embossing unit 111 with an embossing roller 113 cooperating with a pressure roller 115.
  • the surface of the embossing roller 113 is equipped with micro-embossing protuberances 113P.
  • the ply V3 is fed through a second secondary embossing unit 114, comprising an embossing roller 117, the surface of which is equipped with projections or protuberances 117P, cooperating with a pressure roller 119 similar to the pressure roller 115.
  • the secondary embossing unit 111 can be omitted, as can the secondary embossing unit 114, depending on the type of pattern and machining to be performed on the paper material formed by the two plies V1, V3.
  • the glue applied by the dispensing unit 107 to the projections of the paper deformed between the pressure roller 109 and the embossing roller 101 is used to reciprocally bond the two plies, which for this purpose are laminated in the nip formed by the embossing roller 101 and the mating roller 103 to form multi-ply web material N delivered from the embossing unit 100.
  • Figures 3 to 8 schematically show, in various views and sections, portions of a multi-ply web material produced with one or other of the embossing units in Figures 1 and 2 , or other equivalent embossing units, utilizing the concepts underlying the invention.
  • Figure 3 represents a local section and partial perspective view of a portion of a multi-ply web material constituted by two plies V1 and V3 embossed and laminated in tip-to-tip configuration with a glue C to bond the two plies at the level of grooves produced on said plies by the protuberances 1 P and 3P of the embossing rollers 1, 3 of the device in Figure 1 or other equivalent device.
  • the grooves indicated with 201 for the ply V1 and with 203 for the ply V3, have a substantially linear extension and defined therebetween are bulging portions 205, 207 of the web material formed by the outwardly projecting plies V1, V3 of the web material defining projections with an elongated extension delimited by adjacent grooves 201, 203.
  • Figure 6 schematically shows in a top view a portion of the web material N, i.e. observed from the side of the ply V1, embossed as described above.
  • the projections 205 and the grooves 201 have a slightly undulating linear shape and the width of the portions 205 is much greater than the width of the grooves 201.
  • a very efficient cleaning effect is obtained on the surface, due to the fact that the portions 205 of material project outward to form contact and cleaning surfaces, while the grooves 201 define areas to collect the substances or products located on the surface to be cleaned and which must be removed.
  • the rounded convex conformation of the outwardly projecting portions 205 of the ply V1 and of the outwardly projecting portions 203 of the ply V3 make the product soft and pleasing to the touch.
  • the cleaning effect is provided to the same degree on both faces of the web material.
  • the portions 205, 207 project from the base plane of the original ply, i.e. from the surface on which the first ply lies before deformation by embossing.
  • the grooves 201, 203 project towards the inside of the web article and the protuberances 205, 207 project outward to form bulges or embossings with positive effect.
  • Embossing with positive effect is intended as an effect of deformation through embossing wherein the cellulose ply has been deformed to project from the surface of the original ply in relation to the shape thereof prior to embossing.
  • each ply V1, V3 is in actual fact composed of a plurality of cellulose layers, to provide adequate consistency and mechanical resistance to the finished product.
  • resistance to compression can be obtained by producing the web material N with an embossing technique of the nested type, as indicated schematically in Figure 4 .
  • the web material N is again formed by the plies V1 and V3, where the ply V1 is embossed to obtain grooves, again indicated with 201, having a linear extension, defined between which are areas 205 with outwardly projecting convex profiles, i.e. areas of positive embossing.
  • the ply V3 is embossed to form thereon projections 209 facing the inside of the web material N and inserted in the empty space defined by the portions 205 of the ply V1.
  • the protuberances 209 therefore form supports for the convex areas 205 of the ply V1 preventing or in any case reducing compression thereof.
  • the protuberances 209 facing the inside of the web material are approximately in the shape of truncated cones, but it must be understood that they can also have a conformation with linear extension like the grooves 201 produced on the ply V1.
  • the two plies V1 and V3 are bonded by a glue 5 applied to the surface of the ply V1 facing the ply V3 at the level of the grooves 201.
  • the conformation of the surface of the ply V1 can substantially be identical to the one illustrated in Figure 6 , with grooves 201 with an undulated linear extension and corresponding convex projections 205 with a width preferably greater than the width of the grooves 201.
  • the article N configured as shown in Figure 4 will have a preferred active surface defined by the ply V1, with a cleaning capacity, i.e. capacity to remove dirt from the surfaces to be cleaned, substantially equivalent to that of the web material N in Figure 3 .
  • the lower surface of the material, defined by the ply V3 has a lesser cleaning capacity, substantially equivalent to as that of conventional products.
  • Figure 5 shows a local section and partial perspective view of a web material N obtained, for example, with an embossing-laminating device of the type illustrated in Figures 2, 2A and 2B .
  • the ply V1 is still embossed as described with reference to Figures 3 and 4 , with the formation of convex projections 205 with a substantially linear extension delimited by grooves 201.
  • the glue C with which the ply V1 is bonded to the ply V3 below is applied at the level of the grooves 201.
  • the ply V3 has micro-embossing obtained with the embossing unit 114.
  • the ply V1 has no micro-embossing, and therefore the secondary embossing unit 111 substantially remained idle or is not present. It would also be possible for the ply V1 to have micro-embossing over which the embossing forming the projections 205 and the grooves 201 is positioned.
  • the surface conformation of the ply V1 can be the same as that shown in Figure 6 .
  • Figure 7 shows a top view of a different embossing pattern of the ply V1 and/or of the ply V3.
  • the same numbers indicate the same or equivalent parts to those shown in Figure 6 .
  • the pattern is characterized by a more marked undulation of the protuberances and of the grooves on the surface of the ply.
  • Figure 8 shows a local section of an embossed web material according to the invention obtained, for example, with an embossing-laminating unit as shown in Figure 1 .
  • the same numbers indicate the same or equivalent parts to those in Figure 4 .
  • inside the empty space produced under the projections 205 are several adjacent protuberances or projections 209 produced on the ply V3.
  • Figure 9 shows a top view of a fragment of an embossed web material according to the invention, with a different surface structure.
  • grooves again indicated with 201, are produced on the surface of the ply V1, arranged to at least partly surround raised areas, i.e. outwardly facing convex areas, indicated with 205.
  • These areas 205 form projections embossed according to a positive embossing as defined above.
  • Figure 9 shows a fragment of the web material with one of these projecting portions 205, surrounded by grooves 201 divided into four contiguous portions. It must be understood that on the surface of the web material there can be a plurality of grooves 201 defining the same number of projections 205 arranged according to a suitable pattern.
  • the grooves can have a different conformation, e.g. they can fully surround the projecting portions 205, and/or they can have a different geometrical shape in relation to the one shown.
  • Figure 10 shows a local section of a portion of the web material shown in Figure 9 , in which it can be seen that arranged under the convex projection 205 are protuberances, still indicated with 209, produced in the ply V3 and arranged in nested configuration in the empty space inside the web material below the convex projections 205.
  • the lower ply V3 can be embossed with micro-embossing as shown in Figure 5 , or with a similar pattern to that of the ply V1 in a tip-to-tip embossed configuration as shown in Figure 3 or in any other suitable way.
  • the projections 205 are constituted by areas almost closed and surrounded by grooves 201, which no longer extend for a substantially indefinite length like those in Figures 6 and 7 .
  • the convex projecting portions 205 again define contact and cleaning surfaces, while the grooves 201 define spaces to collect the dirt and debris removed from the surface cleaned with the web material N.
  • Figures 11 and 13 schematically show further possible embossing patterns according to the invention.
  • the lines represented in the drawings indicate embossing motifs or patterns with linear extension, according to closed lines.
  • Figure 11 shows embossing patterns characterized by embossed lines with double lobes, delimiting an inner surface forming an outwardly facing convex projection of the web material.
  • Figure 12 shows an embossing pattern characterized by groups of closed, V-shaped embossing lines with a wide aperture, arranged to produce a sort of flower.
  • Figure 13 shows closed embossing lines similar to the lines in Figure 12 , but arranged according to parallel and intercalated alignments.
  • the ply embossed with the embossing lines defining the outwardly projecting areas of the web material can also have conventional embossing, intercalated with these embossing lines forming the grooves, to "embed" the areas embossed with positive embossing in areas embossed according to a conventional embossing motif.
  • FIG 14 shows a diagrammatic side view of an embodiment of an embossing unit for manufacturing a multi-ply embossed paper sheet according to the invention in a particularly preferred embodiment.
  • the unit designated 301 as a whole, includes a first embossing roller 303 and a second embossing roller 305, defining a lamination nip 307 therebetween. An enlargement of the lamination nip 307 is shown in Fig.15 .
  • Each embossing roller 303, 305 co-acts with a corresponding pressure roller 309, 311.
  • the pressure rollers 309, 311 are provided with an outer pliable cover, made of elastically yielding material, such as rubber or the like, shown at 309A and 311A respectively.
  • Each embossing roller forms, along with the corresponding pressure roller, an embossing nip, through which a respective first and second outer ply V1 and V3 are fed.
  • a glue applicator 313 applies glue on the top surface of the embossing protrusions generated on ply V1 by the coaction of rollers 303 and 309.
  • a similar glue applicator can be arranged around the embossed roller 305.
  • a first and a second intermediate plies V5, V7 are fed into the lamination nip 307 between embossing rollers 303, 305.
  • Each ply V5, V7 is embossed in a respective auxiliary embossing device 315, 317.
  • Each auxiliary embossing device includes an embossing roller 315A, 317A provided with outwardly oriented protrusions (see enlargement of roller 315A), co-acting with a pressure roller 317A, 317B provided with an elastic yielding surface.
  • the two embossing rollers 303, 305 are provided with protrusions 303P and 305P.
  • the protrusions 303P, 305P are arranged in a tip-to-tip or foot-to-foot arrangement as shown in detail in Fig.15 . This means that the protrusions of one roller are substantially in phase with those of the opposing roller.
  • the four plies V1, V3, V5, V7 are laminated together at the mutually corresponding top surfaces of the opposing protrusions 303P, 305P, so that they are glued together by means of the adhesive applied by the glue distributor 313 and possibly by the second glue distributor 313A (if present).
  • Fig 16 shows an enlarged diagrammatic cross section of a product which can be obtained with the unit of Figs. 14, 15 .
  • the outer plies V1, V3 are embossed such as to form bubbles or bulging protrusions B and B1 extending towards the outside.
  • Inwardly oriented depressions or grooves D and D1 are generated in the two plies by the protrusions 303P, 305P of the rollers 303 and 305.
  • the two inner plies V5, V7 are arranged within the outer plies V1, V3 and their protrusions (generated by auxiliary embossing devices 315, 317 protrude towards the outer plies V1, V3, such as to form a supporting structure, which limits the risk of the bulging protrusions B, B1 collapsing towards the interior of the product.
  • the height H of the bulging protrusions extending towards the outside of the product can be larger than the height h of the inner protrusions formed in the intermediate plies.
  • the height H can range from 1.2 to 1.6 mm and preferably around 1.4 mm, while the height h can range between 1.0 and 1.4 and preferably between 1.1 and 1.3 mm. It shall be understood that these values are given by way of example only and are not to be considered limitative of the invention.
  • Fig.16A shows a top plan view of a fragment of a product according to the invention.
  • Bulging protrusions are shown again at B, each protrusion being surrounded by a closed inwardly oriented linear groove or depression D.
  • the bottom portions of the grooves or depressions D (or at least part thereof) are provided with glue.
  • each protrusion B is entirely surrounded by a groove or depression D extending along a closed line.
  • This line can be however only substantially closed, i.e. it can partly but not entirely surround the protrusion B.
  • a substantially closed line shall be understood as a line, which covers at least 60% and preferably at least 70% and most preferably at least 80% of the linear perimeter of the protrusion B.
  • the bulging protrusions B extend towards the outside forming a sort of bubble.
  • the bubble is at least partly prevented from collapsing by the linear glue distribution along the partly or entirely closed groove or depression line D surrounding the protrusions B, in combination with the protrusions of the intermediate plies V5, V7.
  • Fig.17 shows a modified embodiment of the product according to the invention.
  • the second outer ply V3 is substantially smooth, i.e. not embossed.
  • This product can be achieved by removing or making the auxiliary embossing device 313 inactive and by replacing the roller 305 with one which is substantially smooth, i.e. not provided with protrusions.
  • the roller 305 can be moved away from roller 303, such that the two rollers are not pressed one against the outer in the lamination nip 307 and a further marrying or lamination roller with a smooth surface is arranged e.g. downstream of the nip 307, said marrying or lamination roller being pressed against the protrusions of roller 303.
  • Figs. 19, 20 show a further embossing pattern according to the invention. More specifically, Fig.19 shows a top view of a fragment of one of the inner plies V5, V7. In this embodiment the or each one of the inner plies has embossing lines surrounding bulging protrusions BP in the shape of elongated projections.
  • Fig. 20 shows the four-ply product resulting from the embossing and lamination of plies V1, V3, V5, V7 with the embossing unit 301 of Fig. 14 using inner plies embossed according to the pattern in Fig.19 .
  • the inner plies V5, V7 are arranged randomly, as shown in Fig.20 , i.e. there is no pre-established correspondence between the protrusions of one ply and those of the other ply.
  • Fig.18 shows still a further embodiment of the product according to the invention.
  • only one inner ply V5 is provides, said ply being provided with protrusions which project from both surfaces towards both outer plies V1 and V3.
  • the product of Fig.18 can be obtained with an embossing and laminating unit shown in Figs, 21 and 22 , and again designated 301 as a whole.
  • the same reference numbers are used to indicate elements and parts of the unit which are identical or equivalent to those of Fig.14 .
  • the auxiliary embossing unit 315 is comprised of two embossing rollers each provided with protrusions (see Fig.22 , showing an enlargement of the embossing nip between rollers 315X, 315Y).
  • the protrusions of the two rollers mesh with each other such as to generate protrusions on both surfaces of the ply V5.
  • the inner plies are arranged in a tip-to-tip arrangement, wherein at least part of the protrusions of the two plies are opposing each other such as to increase the overall thickness of the product.
  • the two inner plies are embossed in a tip-to-tip embossing and laminating unit 401 combined to the embossing and laminating unit 301.
  • the same reference numbers are used in Fig.23 to designate the same or equivalent parts and elements as in Fig.21 .
  • the two inner plies V5, V7 are fed in respective embossing nips formed by first and second embossing rollers 401, 403 and two pressure rollers 405, 407.
  • the two embossed plies V5, V7 are then fed through a lamination nip between embossing rollers 401, 403 where they are bonded together.
  • Glue can be applied e.g.
  • the unit 401 is quite the same as unit 301, but the protrusions of the embossing rollers 401, 403 are smaller in size and preferably of simpler shape. For example they can have the shape shown in Fig.19 .
  • the protrusions of the embossing rollers 401, 403 can be distributed with a density higher than 15 protrusions per square centimeter, and preferably between 20 and 300 protrusions per square centimeter, more preferably between 30 and 150 protursions per square centimeter or any range within the values mentioned above.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Laminated Bodies (AREA)
  • Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)
EP10006232.2A 2006-10-11 2007-10-01 A paper material with an improved embossed pattern and method for the production thereof Active EP2228208B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PL10006232T PL2228208T3 (pl) 2006-10-11 2007-10-01 Materiał papierowy z ulepszonym wytłaczanym wzorem i sposób jego wytwarzania
SI200731385T SI2228208T1 (sl) 2006-10-11 2007-10-01 Papirnat material z izboljšanim vtiskanim vzorcem in postopek proizvodnje le-tega
CY20141100038T CY1114758T1 (el) 2006-10-11 2014-01-16 Ενα χαρτινο υλικο με βελτιωμενο αναγλυφο μοτιβο και μεθοδος για την παραγωγη αυτου

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000245A ITFI20060245A1 (it) 2006-10-11 2006-10-11 Un materiale in carta con elevate caratteristiche detergenti e metodo per la sua produzione
EP07425604.1A EP1911574B2 (en) 2006-10-11 2007-10-01 A paper material with an improved embossed pattern and method for the production thereof

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP07425604.1 Division 2007-10-01
EP07425604.1A Division-Into EP1911574B2 (en) 2006-10-11 2007-10-01 A paper material with an improved embossed pattern and method for the production thereof

Publications (2)

Publication Number Publication Date
EP2228208A1 EP2228208A1 (en) 2010-09-15
EP2228208B1 true EP2228208B1 (en) 2013-12-04

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EP07425604.1A Active EP1911574B2 (en) 2006-10-11 2007-10-01 A paper material with an improved embossed pattern and method for the production thereof

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Application Number Title Priority Date Filing Date
EP07425604.1A Active EP1911574B2 (en) 2006-10-11 2007-10-01 A paper material with an improved embossed pattern and method for the production thereof

Country Status (10)

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EP (2) EP2228208B1 (el)
AT (1) ATE475532T2 (el)
CY (2) CY1110849T1 (el)
DE (1) DE602007008025D1 (el)
DK (2) DK2228208T3 (el)
ES (2) ES2443142T3 (el)
IT (1) ITFI20060245A1 (el)
PL (2) PL1911574T5 (el)
PT (2) PT1911574E (el)
SI (2) SI2228208T1 (el)

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Also Published As

Publication number Publication date
DK2228208T3 (da) 2014-03-10
DK1911574T4 (da) 2019-07-01
ES2348382T3 (es) 2010-12-03
EP1911574B1 (en) 2010-07-28
EP1911574A1 (en) 2008-04-16
PT2228208E (pt) 2014-02-24
PL1911574T3 (pl) 2011-01-31
SI2228208T1 (sl) 2014-02-28
SI1911574T1 (sl) 2010-11-30
DE602007008025D1 (de) 2010-09-09
DK1911574T3 (da) 2010-11-01
ES2348382T5 (es) 2019-11-12
CY1110849T1 (el) 2015-06-10
ITFI20060245A1 (it) 2008-04-12
CY1114758T1 (el) 2016-12-14
PL2228208T3 (pl) 2014-05-30
SI1911574T2 (sl) 2019-08-30
ES2443142T3 (es) 2014-02-18
PL1911574T5 (pl) 2019-09-30
PT1911574E (pt) 2010-10-11
EP1911574B2 (en) 2019-03-20
EP2228208A1 (en) 2010-09-15
ATE475532T2 (de) 2010-08-15

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