EP1985438A2 - Matériau de feuille de papier gaufré - Google Patents

Matériau de feuille de papier gaufré Download PDF

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Publication number
EP1985438A2
EP1985438A2 EP08425225A EP08425225A EP1985438A2 EP 1985438 A2 EP1985438 A2 EP 1985438A2 EP 08425225 A EP08425225 A EP 08425225A EP 08425225 A EP08425225 A EP 08425225A EP 1985438 A2 EP1985438 A2 EP 1985438A2
Authority
EP
European Patent Office
Prior art keywords
web material
protuberances
convexities
embossing
ply
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.)
Granted
Application number
EP08425225A
Other languages
German (de)
English (en)
Other versions
EP1985438B2 (fr
EP1985438A3 (fr
EP1985438B1 (fr
Inventor
Stefani Emi
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
Original Assignee
Delicarta SpA
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
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Application filed by Delicarta SpA filed Critical Delicarta SpA
Priority to PL08425225T priority Critical patent/PL1985438T5/pl
Publication of EP1985438A2 publication Critical patent/EP1985438A2/fr
Publication of EP1985438A3 publication Critical patent/EP1985438A3/fr
Application granted granted Critical
Publication of EP1985438B1 publication Critical patent/EP1985438B1/fr
Publication of EP1985438B2 publication Critical patent/EP1985438B2/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
    • B31F2201/0733—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
    • B31F2201/0766—Multi-layered the layers being superposed tip to tip

Definitions

  • the present invention relates to paper processing and more specifically tissue paper processing. Specifically, the present invention relates to a new type of embossed paper web material, for example utilizable to produce toilet paper, kitchen towels, paper napkins, handkerchiefs or the like.
  • Embossing is one of the operations typically carried out on plies or sheets of tissue paper, to produce paper articles for personal cleaning and hygiene, or also for commercial or industrial use, such as toilet paper, kitchen towels, paper napkins and handkerchiefs and the like.
  • Embossing is an operation performed for the dual purpose of improving aesthetic characteristics and increasing functional characteristics, such as, in particular the softness, smoothness, absorption capacity or thickness of the finished material.
  • tissue paper material such as kitchen towels and toilet paper
  • a tissue paper material is produced from two or more plies of paper which are embossed separately and subsequently joined together by applying glue and laminating the plies between counter-rotating rollers defining a lamination nip.
  • Embossing is typically performed by feeding each ply between an embossing roller, provided with protuberances, and a pressure roller with an outer surface coated in a yielding material, typically rubber.
  • a yielding material typically rubber.
  • This is referred to as rubber-to-steel embossing, as the embossing roller is typically made of steel.
  • embossing takes place between two rollers made of steel or another hard material, one provided with protuberances and the other with corresponding recesses.
  • the protuberances of the embossing roller generate corresponding protuberances or projections in the paper ply.
  • the protuberances formed in the two outermost plies are oriented toward the inside of the finished product.
  • the two plies of paper web material are joined to one another by making the protuberances of one ply correspond with the protuberances of the other ply, after a glue has been applied to the protuberances of one of the two plies, or to at least part thereof.
  • two embossing rollers that separately emboss two plies of paper by means of respective pressure rollers form therebetween a lamination nip, through which the two embossed plies pass, before being detached from said rollers.
  • the protuberances of one roller coincide with the protuberances of the other and the reciprocal distance between the rollers is such as to cause localized compression of the plies at said protuberances.
  • a tip-to-tip embosser to obtain a product of this type is described in US-A-3,414,459 .
  • the tip-to-tip embossing technique has been gradually perfected and improved, in order to solve particular problems that arise with this processing method.
  • US-A-5,096,527 describes a technique to reduce vibrations and wear in tip-to-tip embossing units.
  • US-A-6,113,723 describes a distribution of protuberances having the object of increasing the bonding strength through a particular arrangement of the protuberances.
  • US-A-5,736,223 describes a method for producing a paper article in sheet form comprising three layers or plies of tissue paper.
  • US-A-5,173,351 ; US-A-6,032,712 ; US-A-6,245,414 and US-A-6,053,232 describe embossing-laminating units, which use particular measures to prevent concentrated wear of the protuberances even when these do not coincide completely, but only in regions, with some of the protuberances of one roller coinciding with some of the protuberances of the other roller.
  • US-A-3,961,119 describes a tip-to-tip embossing unit, wherein two embossing rollers cooperating with each other are provided with helical projections. The projections of one embossing roller have protrusions engaging with recesses produced in the helical projections of the opposed embossing roller.
  • the two plies are embossed separately, each between an embossing roller and a counter roller or pressure roller.
  • the two plies are then bonded to each other so that the protuberances of one ply nest between the protuberances of the other.
  • This is referred to as "nested" embossing.
  • Lamination of the two plies is obtained between one of the embossing rollers and a laminating roller, while the two embossing rollers are not touching. Examples of embossing-laminating devices of this type are described in US-A-3,556,907 ; US-A-3,867,225 and US-A-5,339,730 .
  • Some embossing units can perform embossing according to the nested technique or according to the tip-to-tip technique alternately.
  • Embossing was initially performed according to very simple geometrical patterns, with uniform distributions of frusto-cone or frusto-pyramid shaped protuberances. These embossing patterns had a prevalently technical function, being used to produce a product of adequate thickness and with sufficient softness and absorption capacities.
  • embossing is increasing required to perform a double 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 increasingly high technical and commercial requirements demanded of these articles. Embossing is no longer obtained using only simple geometrical patterns, but with a combination of more or less closely spaced embossing patterns (at times micro-embossing patterns) and decorative patterns embossed and, if necessary, printed. Examples of complex embossing patterns are described in US-A-6,136,413 ; US-A-5,846,636 ; US-A-6,106,928 .
  • the invention proposes the production of an embossed paper web material, in particular a multi-ply tissue paper web material, with a new type of embossing that allows particular technical-functional and aesthetic effects to be obtained.
  • the invention relates to an embossed paper web material comprising at least two plies, wherein: at least one of said plies is provided with a background embossing pattern constituted by linear protuberances extending according to closed lines projecting toward the inside of the web material; wherein the portions of ply delimited by said closed lines form convexities facing the outside of the web material; and wherein said convexities are distributed with a density equal to or greater than 6 convexities/cm 2 and preferably between 10 and 30 convexities/cm 2 .
  • an embossing unit 1 comprises a first embossing roller 3 cooperating with a first pressure roller 5 provided with a surface 5A made of elastically yielding material, such as rubber or the like.
  • a first ply V1 which will form a web material N, is fed into the embossing nip between the embossing roller 3 and the pressure roller 5.
  • the surface of the embossing roller 3 (shown in a greatly enlarged schematic view in Figure 1A ) is provided with a raised pattern constituted by protuberances P1 and recesses P3, the shape of which is better illustrated hereunder with reference to Figures 8 to 11 .
  • a glue dispenser, indicated schematically with 7, and a laminating roller 9 are arranged along the extension of the embossing roller 3.
  • a second ply V2 is fed into the nip formed between the laminating roller 9 and the embossing roller 3 and is bonded to the ply V1 by gluing in the lamination nip between the rollers 3 and 9, due to the pressure exerted by the laminating roller 9 on the projecting surfaces of the protuberances P1 of the embossing roller 3, on which the embossed ply V1 is located and to the raised regions of which, obtained by embossing and coinciding with the protuberances P1, the glue dispenser 7 has applied a glue for bonding to the ply V2.
  • an auxiliary embossing unit 11 is provided along the path of the ply V2, comprising an embossing roller 13 and a pressure roller 15, for example provided with a coating 15A made of elastically yielding material, analogous to the pressure roller 5 with its coating 5A.
  • the embossing roller 13 is provided with an embossing or micro-embossing pattern with protuberances P13, for example frusto-pyramid or frusto-cone shaped protuberances of small dimensions and high density, for example a density greater than 15 protuberances/cm 2 and preferably greater than 30 protuberances/cm 2 .
  • the embossing unit 1 described above can be used to produce a web material N with two plies V1 and V2, the ply V1 of which has been embossed by the embossing roller 3 with the pressure roller 5, while the ply V2 is smooth. In this case the embossing unit 11 is deactivated or omitted.
  • Figure 2 shows a schematic enlargement of a web material of this type, which is obtained by deactivating or omitting the auxiliary embossing unit 11.
  • Protuberances 1 P are produced on the ply V1 facing the inside of the web material and generated by the raised regions P1 of the embossing roller 3. Due to the formation of the protuberances P1 and the recesses P3 of the embossing roller 3, as will be described below, the ply V1 also has cushioned or convex regions, indicated with 1C, facing outward.
  • Figure 3 shows a schematic and greatly enlarged section of the web material obtained with the embossing unit 1 when the auxiliary embossing unit 11 is also operating.
  • the same numbers indicate the same or equivalent parts to those in Figure 2 .
  • the ply V2 has a micro-embossing pattern constituted by the protuberances facing the inside of the web material N, generated by the projections or protuberances P13 of the auxiliary embossing roller 13.
  • the protuberances P1 on the embossing roller 3 are constituted by linear protuberances defined by closed lines, which in the example shown have an approximately rectangular extension.
  • the raised areas P1 have a net shape with substantially rounded rectangular mesh surrounded by recesses P3 etched in the surface of the embossing roller 3.
  • the recesses P3 are arranged in pairs staggered angularly by 90° with respect to each other.
  • the mesh or net structure in Figure 9 is therefore substantially constituted by a group of protuberances extending linearly, which form a continuous structure, each of which extends according to a substantially rectangular closed line which surrounds a respective recess P3.
  • Figures 10 and 11 schematically show the sections according to planes orthogonal to each other, of the protuberances P1 and of the hollows or recesses P3 defined inside the protuberances.
  • the protuberances P1 have a front surface P1F with a rounded section, i.e. provided with regions without sharp connecting corners at the sides, indicated with P1L, of these protuberances.
  • the bottom of the hollow regions P3, indicated with P3F, is connected to the sides P1 L of the protuberances P1 through curved surfaces, i.e. also in this case without sharp corners.
  • both the hollows or recesses P3 and the tips or protuberances P1 have a beveled or rounded shape preferably on the entire surface extension of the embossing roller 3.
  • the material in ply V1 is substantially provided with an embossing pattern that repeats the pattern in Figure 9 , with the difference that on the ply V1 the hollow regions P3 of the roller 3 correspond to the convex or cushioned portions 1C projecting toward the outside of the web material V1, while the protuberances P1 with continuous linear shape defining the net structure correspond to projections 1 P on the embossed material facing the inside of the web material and to which the glue C is applied for bonding to the ply V2 below.
  • the active surface of the embossing roller 3, i.e. the raised region corresponding to the protuberances P1 that follow the continuous closed lines, can be in the order of 20-40% of the total surface, more preferably between 25 and 35% and even more preferably between 28 and 32% of the total surface of the roller.
  • the convexities 1C i.e. the raised portions or projections generated on the ply V1 and oriented toward the outside of said ply as a result of embossing through the linear protuberances P1 extending according to closed lines surrounding the raised regions P3, are distributed with a density of at least 6 convexities/cm 2 and preferably between 10 and 30 convexities/cm 2 .
  • both plies V1, V2 are provided with an embossing pattern defined by convex or cushioned regions 1C projecting toward the outside and formed by portions of ply V1 defined on the inside of the protuberances 1 P extending according to closed lines.
  • both plies V1, V2 it would also be possible for both plies V1, V2 to be provided with an embossing pattern of this type.
  • an embossing-laminating unit of the type shown in Figure 4 can be used.
  • This embossing-laminating unit indicated with 51 comprises a first embossing roller 53 cooperating with a first pressure roller 55 provided with a surface coating 55A made of elastically yielding material.
  • the embossing roller 53 cooperates with a glue dispenser 57 and with a second embossing roller 59.
  • the latter in turn cooperates with a pressure roller 61 with a coating 61A made of elastically yielding material.
  • the embossing roller 59 and the pressure roller 61 emboss a ply V2 fed into the embossing nip between the two rollers 59, 61.
  • the surfaces of the two embossing rollers 53 and 59 are engraved according to patterns analogous or equivalent to those in Figures 8 and 9 , so that the two plies V1, V2 are embossed separately from each other according to an embossing pattern equivalent to the one generated by the embossing pattern in Figure 9 .
  • Figure 5 schematically shows a greatly enlarged cross section of a portion of web material N formed by the two plies V1, V2, which in this case are provided with similar embossing patterns with areas 1C projecting in relief according to a sort of cushion or convexity toward the outside of the web material N.
  • the regions 1C are surrounded by projections 1P which instead face the inside of the web material, in the same manner as provided for the ply V1 alone in the diagram in Figure 3 .
  • the convexities or cushioned regions have a rounded shape, without sharp corners, due to the rounded shape of the engravings produced on the embossing rollers. Together with the raised embossing effect obtained by means of the convexity of the projections 1C, this gives the finished product a particular effect more pleasing to the touch.
  • the projections or convexities 1C have a maximum dimension between 2 and 6 mm.
  • the recesses P3 of the embossing roller have a maximum dimension between, for example, 2 and 6 mm, and preferably no greater than 5 mm.
  • Figure 9 indicates the maximum and minimum dimensions D1 and D2 of the recesses P3.
  • the dimensions of the base of the protuberances of convexities 1C of the embossed product can be defined analogously.
  • Figure 12 indicates with D the dimensions of the convexity or projection 1C facing the outside measured in the plane of the section.
  • the recesses P3 of the embossing roller and analogously the projections or convexities 1C of the ply can have an approximately rectangular shape, as shown, or other polygonal shapes.
  • maximum plan dimensions in the case of the rectangular shape the maximum dimension is that of the diagonal, which can be between 2.5 and 8 mm and preferably no greater than 7 mm, can be defined.
  • the embossing pattern described above which forms on one, on the other or on both of the two plies V1, V2 the outward facing raised regions 1C, can be used as background embossing or as the sole embossing pattern of the web material.
  • this embossing pattern can be superposed by a decorative embossing pattern produced with protuberances of greater dimensions, for example in particular of greater height.
  • protuberances extend according to decorative or aesthetic motifs which are also applied by embossing on one or other of the plies V1, V2 after they have been subjected to background embossing according to the embossing patterns described above.
  • FIGs 6, 6A, 6B shows an embossing unit 101 which can be utilized to obtain embossing pattern of this type.
  • V1 and V2 again indicate the two plies which once bonded form the web material N.
  • Figure 7 shows a greatly enlarged schematic section of the web material N with the plies V1 and V2 glued to each other.
  • the ply V2 is smooth, but it would also be possible for it to be provided with an embossing pattern similar to the one obtained on the ply V1 with the cushioned regions 1C and the protuberances facing the inside 1P, or with micro-embossing with frusto-cone or frusto-pyramid shaped protuberances analogous to those in the embodiment in Figures 1 and 3 for the ply V2.
  • the embossing unit 101 has an embossing roller 103 cooperating with a pressure roller 105 coated with an elastically yielding layer 105A.
  • embossing unit 109 comprising an embossing roller 111, for example engraved like the embossing roller 3 of the embodiment in Figure 1 .
  • the embossing roller 111 cooperates with a pressure roller 113, whose external cylindrical surface is advantageously coated with a layer 113A of elastically yielding material, such as rubber or the like.
  • the embossing roller 103 can have an embossing pattern characterized by protuberances 103P distributed according to decorative motifs.
  • the height of the protuberances 103P is greater than that of the protuberances P1 provided on the embossing roller 111, so that, after double embossing, the ply V1 is as shown in Figure 7 , i.e.
  • the protuberances P103 define the decorative motifs and the gluing regions in which the ply V1 is bonded to the ply V2 by means of the glue C distributed by the glue dispenser 117 on the portions of ply V1 located on the top or front surfaces of the projections or protuberances 103P.
  • the ply V2 can be embossed in different ways with micro-embossing, embossing of the type 1C, 1P or in another suitable manner, instead of being smooth as shown schematically in

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Paper (AREA)
EP08425225.3A 2007-04-06 2008-04-04 Matériau de feuille de papier gaufré Active EP1985438B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL08425225T PL1985438T5 (pl) 2007-04-06 2008-04-04 Materiał wstęgi papieru tłoczonego

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000084A ITFI20070084A1 (it) 2007-04-06 2007-04-06 Materiale nastriforme cartaceo goffrato

Publications (4)

Publication Number Publication Date
EP1985438A2 true EP1985438A2 (fr) 2008-10-29
EP1985438A3 EP1985438A3 (fr) 2014-07-30
EP1985438B1 EP1985438B1 (fr) 2016-12-28
EP1985438B2 EP1985438B2 (fr) 2020-02-19

Family

ID=39720563

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08425225.3A Active EP1985438B2 (fr) 2007-04-06 2008-04-04 Matériau de feuille de papier gaufré

Country Status (5)

Country Link
EP (1) EP1985438B2 (fr)
ES (1) ES2616356T5 (fr)
HU (1) HUE033601T2 (fr)
IT (1) ITFI20070084A1 (fr)
PL (1) PL1985438T5 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114635310A (zh) * 2022-03-04 2022-06-17 浙江景兴纸业股份有限公司 一种处理生鲜的压花厨房用纸

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH368047A (de) * 1958-05-19 1963-03-15 Clemens Fa Ludwig Verfahren zur Herstellung von Polsterbahnen für Verpackungszwecke, Einrichtung zur Ausübung dieser Verfahren sowie nach diesen Verfahren hergestellte Polsterbahn
US4320162A (en) * 1980-05-15 1982-03-16 American Can Company Multi-ply fibrous sheet structure and its manufacture

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US3738905A (en) 1970-04-29 1973-06-12 Kimberly Clark Co Paper toweling material and method of combining into multi ply products
FR2707311B1 (fr) * 1993-07-09 1995-09-08 Kaysersberg Sa Papiers gaufrés multicouches, dispositif et procédure pour leur élaboration.
FR2728152B1 (fr) 1994-12-16 1997-01-24 Kaysersberg Sa Papier absorbant gaufre a motifs combines
US5913765A (en) 1995-03-02 1999-06-22 Kimberly-Clark Worldwide, Inc. System and method for embossing a pattern on a consumer paper product
CA2255654C (fr) 1996-05-23 2004-11-02 The Procter & Gamble Company Papier de soie a couches multiples
DE19734414A1 (de) 1997-08-08 1999-02-25 Sca Hygiene Prod Gmbh Verfahren zum Herstellen eines relativ weichen Produktes sowie das Produkt selbst
US6602577B1 (en) 2000-10-03 2003-08-05 The Procter & Gamble Company Embossed cellulosic fibrous structure
JP2004244772A (ja) 2003-02-17 2004-09-02 Daio Paper Corp ラミネートシートおよびその製造方法
DE602004002206T2 (de) † 2003-05-01 2007-08-02 Johnson & Johnson Gmbh Folienähnliches Produkt
ATE545501T1 (de) 2005-06-08 2012-03-15 Procter & Gamble Einzelne und lineare prägungen enthaltendes geprägtes produkt, verfahren und vorrichtung zu dessen herstellung
AU2005333449B2 (en) 2005-06-21 2011-04-14 Essity Operations Mannheim GmbH Multi-ply tissue paper, paper converting device and method for producing a multi-ply tissue paper

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH368047A (de) * 1958-05-19 1963-03-15 Clemens Fa Ludwig Verfahren zur Herstellung von Polsterbahnen für Verpackungszwecke, Einrichtung zur Ausübung dieser Verfahren sowie nach diesen Verfahren hergestellte Polsterbahn
US4320162A (en) * 1980-05-15 1982-03-16 American Can Company Multi-ply fibrous sheet structure and its manufacture

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114635310A (zh) * 2022-03-04 2022-06-17 浙江景兴纸业股份有限公司 一种处理生鲜的压花厨房用纸

Also Published As

Publication number Publication date
ES2616356T3 (es) 2017-06-12
EP1985438B2 (fr) 2020-02-19
PL1985438T3 (pl) 2017-08-31
EP1985438A3 (fr) 2014-07-30
ITFI20070084A1 (it) 2008-10-07
ES2616356T5 (es) 2020-10-08
HUE033601T2 (en) 2017-12-28
EP1985438B1 (fr) 2016-12-28
PL1985438T5 (pl) 2020-07-13

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