EP1029657B1 - Paper embossing method, embossing rollers therefor, and embossed paper obtained - Google Patents

Paper embossing method, embossing rollers therefor, and embossed paper obtained Download PDF

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Publication number
EP1029657B1
EP1029657B1 EP99125689A EP99125689A EP1029657B1 EP 1029657 B1 EP1029657 B1 EP 1029657B1 EP 99125689 A EP99125689 A EP 99125689A EP 99125689 A EP99125689 A EP 99125689A EP 1029657 B1 EP1029657 B1 EP 1029657B1
Authority
EP
European Patent Office
Prior art keywords
paper
embossing
recesses
web
roller
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
EP99125689A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1029657A1 (en
Inventor
Tommaso Perini
Pierluigi Perrini
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.)
PAPERNET S.P.A.
Original Assignee
Papernet 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
Application filed by Papernet SpA filed Critical Papernet SpA
Publication of EP1029657A1 publication Critical patent/EP1029657A1/en
Application granted granted Critical
Publication of EP1029657B1 publication Critical patent/EP1029657B1/en
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
    • 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
    • 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
    • B31F2201/0789—Joining plies without adhesive

Definitions

  • the present invention relates to the field of the paper converting machines and, more precisely, it relates to a paper embossing method of a single or multiple web of paper, non woven fabric and similar material, such as for example, but not exclusively, for the production of rolls of all purpose paper, toilet paper, industrial rolls and the like.
  • the invention relates to a particular shape of embossing rollers, i.e. rollers used in embossing machines that carry out this method.
  • the invention relates to the embossed paper thus obtained.
  • Embossing machines comprising embossing rollers each of which has a plurality of rows of protrusions and recesses.
  • a pressure roller engages normally yielding and coated with rubberised material, suitable for pushing the web of paper against said protrusions and recesses.
  • surface of paper is given a not smooth profile, with a succession of protrusions and recesses that substantially copy the surface of the embossing roller.
  • the smooth paper is thus converted into embossed paper, which can maintain its shape up to the final utilisation
  • An embossing machine see e.g EP-A-738588 can comprise, in particular, two embossing rollers combined with two pressure rollers. Between each couple of embossing roller / pressure roller a corresponding web of paper passes through that matches the other web of paper at the contact line between the two embossing rollers. Previously, one of the two webs of paper has been advantageously moistened with glue so that the two webs stick to each other.
  • the protrusions and recesses of the embossing rollers are arranged according to rows which are parallel or slightly oblique with respect to the generating lines of the cylindrical surfaces of the rollers same. This allows to obtain different embossing patterns affecting the shape, the distances and the mutual position of the protrusions and of the recesses.
  • US-A-4,671, 987 discloses an embossing pattern of individual pixel-shaped protrusions and recesses arranged according to wavy lines.
  • Said method comprises the steps of:
  • the protrusions and the recesses are arranged according to respective waves that extend parallel to the axis of the embossing roller.
  • the steps are provided of:
  • the protrusions and recesses are arranged according to respective sinusoidal parallel waves.
  • the first and/or second web of paper are moistened with water or glue before passing through said first and second embossing roller.
  • an embossing roller according to claim 5.
  • Said roller comprises on its surface a succession of a plurality of protrusions arranged like a wave and a plurality of recesses arranged like a wave.
  • the protrusions and recesses are respectively grooves and crests arranged like a continuos wave on the cylindrical surface of the roller.
  • the grooves have tapered walls and have on their bottom a plurality of circular shallow recesses.
  • the crests have tapered shape and have on the tip a plurality of substantially circular buttons.
  • the shape of the buttons and of the recesses can be varied without departing from the scope of the invention.
  • the successive waves of protrusions and recesses are preferably sinusoidal and parallel to one another. In particular, but not exclusively, they are parallel to the generating lines of the cylindrical roller.
  • the invention concerns a web of embossed paper according to claim 8.
  • the web has a succession of a plurality of protrusions arranged like a wave and a plurality of recesses arranged like a wave.
  • protrusions and recesses have preferably sinusoidal shape and have respectively a crest with slightly raised circular buttons and a bottom with circular shallow recesses.
  • an embossing machine that carries out the method according to the present invention comprises a first and a second embossing roller, indicated with numerals 1 and 2, with axes parallel and touching each other ( figure 2 ).
  • pressure rollers 3 and 4 are respectively provided having for example rubberised surface and suitable for pressing webs of paper 5 and 6, coming from separate directions, against embossing rollers 1 and 2.
  • Deviating rollers 10 are provided upstream and downstream of point 7 for assuring to webs 5 and 6 and to doubled web 9 a correct trajectory and stretch.
  • the region of contact between rollers 1 and 2 couples webs 5 and 6 through matching protrusions and recesses 1a and 1b of first embossing roller 1 with recesses and protrusions 2b and 2a of second embossing roller 2, respectively.
  • the thickness of the final embossed paper it is possible an actual meshing of the protrusions and recesses ( figure 2 ).
  • the paper in case of embossing a doubled web, can be embossed according to different techniques, for example tip-to-tip embossing type or different type.
  • embossing is carried out so that the depressions on both webs match to one another, whereas in the other case the depressions on both webs are opposed to one another.
  • protrusions and recesses 1a and 1b (or 2a, 2b) of embossing roller 1 (or 2) are shown as a succession of crests and grooves arranged like a wave.
  • the wave has substantially sinusoidal shape.
  • buttons 11 protrude that are arranged like a wave.
  • circular shallow recesses 12 are made that are also arranged like a wave.
  • a circular shape other geometric shapes can be provided for by the designers.
  • Buttons 11 and circular recesses 12 allow a correct embossing, giving to paper 5 a larger surface and then improving its absorbing function.
  • the pitch between two successive wave crests is 4 mm
  • the distance between two buttons or circular recesses of a same wave is 2 mm
  • every button or circular recess has diameter 1 mm.
  • figure 6 This allows to obtain an embossed paper whose impression seen from below is shown in figure 6 .
  • Every circle 15 is embossed by buttons 11.
  • the profile of the protrusions and of the recesses, as well as the embossing caused by to the circular recesses 12, is not shown.
  • figure 6 represents also the circular recesses 12 of the embossed paper seen from the above.
  • FIG 7 instead of the impression of the paper, a top plan view of the embossed paper is shown. Both the impressions 15 of buttons 11 and the impressions 16 of recesses 12 are shown. Furthermore lines 18 of the edges made on paper 5 by crests 1a and by the grooves 1b are shown.
  • the profile of the paper instead, is shown in figure 8A . More precisely, the impressions 15 of buttons 11 and the impressions 16 of recesses 12 are also shown.
  • the wave-like shape increases the elasticity of the paper both transversally and longitudinally. This is clear, in particular, in figure 8B , where the paper of figure 7 is shown also in a position stretched elastically.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Paper (AREA)
  • Sanitary Thin Papers (AREA)
EP99125689A 1998-12-23 1999-12-22 Paper embossing method, embossing rollers therefor, and embossed paper obtained Expired - Lifetime EP1029657B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1998PI000082A IT1306616B1 (it) 1998-12-23 1998-12-23 Metodo di goffratura di un velo singolo o multiplo di carta e similimateriali, rulli goffratori che attuano tale medodo e carta goffrata
ITPI980082 1998-12-23

Publications (2)

Publication Number Publication Date
EP1029657A1 EP1029657A1 (en) 2000-08-23
EP1029657B1 true EP1029657B1 (en) 2009-05-06

Family

ID=11394336

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99125689A Expired - Lifetime EP1029657B1 (en) 1998-12-23 1999-12-22 Paper embossing method, embossing rollers therefor, and embossed paper obtained

Country Status (5)

Country Link
EP (1) EP1029657B1 (it)
AT (1) ATE430652T1 (it)
DE (1) DE69940841D1 (it)
ES (1) ES2323394T3 (it)
IT (1) IT1306616B1 (it)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AUPR081300A0 (en) * 2000-10-18 2000-11-09 Winchester (Avon Downs) Pty Ltd A filtering device
ITMI20071704A1 (it) 2007-08-30 2009-02-28 Ind Cartarie Tronchetti Spa Apparecchiatura per l'incollaggio di due o piu' veli per la realizzazione di prodotti tipo tissue
AU2008360217B2 (en) * 2008-08-07 2015-06-25 Sca Hygiene Products Gmbh Apparatus and method for ply bonding as well as multi-ply product
CN107415434B (zh) * 2017-05-11 2023-08-18 安徽天安新材料有限公司 压纹辊及环保装饰膜的制备装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4339088A (en) * 1980-04-07 1982-07-13 Paper Converting Machine Company Embossing method to avoid nesting in convolutely wound rolls and product
US4671983A (en) * 1985-06-12 1987-06-09 Marcal Paper Mills, Inc. Embossments for minimizing nesting in roll material
EP0738588A1 (en) * 1995-04-13 1996-10-23 Scott Paper Company Improved absorbent paper product and method of making
US5727458A (en) * 1996-03-20 1998-03-17 James River Corporation Of Virginia Method and apparatus for contour multi-level embossing with perforation bonding in selected spaced locations
US6832547B2 (en) * 1996-10-16 2004-12-21 Fort James Corporation Embossing system including sleeved rolls

Also Published As

Publication number Publication date
ES2323394T3 (es) 2009-07-14
EP1029657A1 (en) 2000-08-23
ITPI980082A0 (it) 1998-12-23
ITPI980082A1 (it) 2000-06-23
ATE430652T1 (de) 2009-05-15
DE69940841D1 (de) 2009-06-18
IT1306616B1 (it) 2001-06-18

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