WO1995016070A1 - Machine and method for forming multi-ply linerboard from two sheets - Google Patents

Machine and method for forming multi-ply linerboard from two sheets Download PDF

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Publication number
WO1995016070A1
WO1995016070A1 PCT/US1994/014039 US9414039W WO9516070A1 WO 1995016070 A1 WO1995016070 A1 WO 1995016070A1 US 9414039 W US9414039 W US 9414039W WO 9516070 A1 WO9516070 A1 WO 9516070A1
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WO
WIPO (PCT)
Prior art keywords
web
forming
stock
wire
chamber
Prior art date
Application number
PCT/US1994/014039
Other languages
French (fr)
Inventor
Arnold J. Schmitt
Original Assignee
Beloit Technologies, Inc.
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 Beloit Technologies, Inc. filed Critical Beloit Technologies, Inc.
Priority to AU12663/95A priority Critical patent/AU1266395A/en
Publication of WO1995016070A1 publication Critical patent/WO1995016070A1/en

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Classifications

    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21FPAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/02Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the Fourdrinier type
    • D21F11/04Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the Fourdrinier type paper or board consisting on two or more layers
    • DTEXTILES; PAPER
    • D21PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21FPAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F9/00Complete machines for making continuous webs of paper
    • D21F9/003Complete machines for making continuous webs of paper of the twin-wire type
    • D21F9/006Complete machines for making continuous webs of paper of the twin-wire type paper or board consisting of two or more layers

Definitions

  • This invention relates to papermaking machines. More particularly, this invention relates to papermaking machines for the manufacture of multi-ply linerboard.
  • mini-fourdriniers and other twin-wire top formers form the top ply first and then bond it to the base sheet with a starch shower which bonds or glues the plies together.
  • a starch shower which bonds or glues the plies together.
  • the method and apparatus of this invention forms multi-ply linerboards from two webs of paper joined together.
  • the webs are joined without the necessity of a glue or starch shower because the two surfaces of the two sheets which are brought together have the same freeness and furnish and will thus readily bond together without a binder.
  • Webs which have the same furnish are composed of identical fibers. Webs that have the same degree of freeness are formed of fibers that have been mechanically beaten for the same amount of time. Thus, webs that have the same freeness and furnish are webs that have been made from the same stock of pulp fibers suspended in water.
  • Multi-ply linerboard is normally constructed to have a high quality surface ply, suitable for printing or the like, and one or more additional plys formed of low cost, unbleached or waste fibers which add stiffness and bulk to the linerboard.
  • the surface ply of high quality fibers and the base ply of low cost fibers will not normally bond without the imposition of a binder such as provided through a starch shower.
  • the present invention achieves the desired result by forming a top ply having a surface layer of high-quality bleached fibers and a lower layer of the same fiber composition as the base ply.
  • FIG. 1 is a somewhat schematic, side-elevational view of a forming section of a papermaking machine constructed and operated in accordance with the principles of the present invention.
  • a multi-ply linerboard forming machine 10 is shown.
  • a top ply of linerboard is formed between a first looped forming wire 20 and a second looped forming wire 22.
  • the looped forming wires 20, 22 may be of metal wire or plastic fabric, and are arranged to travel in runs defined by guide rolls.
  • the upper breast roll 26 and the lower breast roll 28 are guide rolls over which the second wire 22 and the first wire 20 turn and which bring the forming wires 20, 22 into opposition.
  • the opposed wires 20, 22 define a forming throat 30 which leads into a forming zone 32.
  • a headbox 34 has a slice 36 which directs two streams of paper-forming stock into the forming throat 30 through a slice opening 38.
  • the slice 36 communicates with the main chamber 40 of the headbox 34.
  • a wall 42 in the main chamber divides the headbox 32 into an upper sub-chamber 44 and a lower sub-chamber 46.
  • the slice main chamber 40 is defined by spaced walls 48, 50.
  • a baffle 52 extends at an angle from the wall 42 and divides the slice main chamber 40 into an upper flow channel 54 and a lower flow channel 56.
  • the upper flow channel 54 is aligned with and communicates with the upper sub-chamber 44.
  • the lower flow channel 56 communicates with the lower sub-chamber 46.
  • the upper sub-chamber 44 has a supply duct 58 which supplies the upper headbox sub-chamber 44 with a first stock 60, which will preferably be of an unbleached or semi-bleached low value fiber.
  • the lower sub-chamber 46 has a lower supply duct 62 which supplies a second stock 64, preferably of a bleached, high value fiber.
  • the unbleached stock 60 is injected into the forming throat 30 through the upper flow channel 54, and the bleached stock 64 is injected into the throat 30 through the lower flow channel 56.
  • the slice baffle 52 keeps the two fibers separated as they are ejected through the slice opening 38 into the forming throat 30.
  • a suction box 66 is located adjacent to the forming throat 30 and serves to dewater the stock to form a paper web 68, shown schematically in the drawing as a series of dots.
  • the skimmer blade rides on the upper wire 20 and deflects water into a save-all 72.
  • One or more additional suction boxes 74 are positioned downstream of the skimmer blade 70 to continue dewatering the web 68.
  • the web 68 then passes between an upper couch roll 76 and a lower couch roll 78.
  • the web 68 is retained on the surface 79 of the second wire 22 which is wrapped around the lower couch roll 78 by a suction gland 80.
  • the Suction gland 80 has a suction control means 82 so as to control the amount of water removed from the web 68. In this manner, the web 68 can be left sufficiently moist for optimal bonding with a base web 84. After the upper wire and lower wire 22 pass over the couch rolls 76, 78, they return by an upper guide roll 86 and a lower guide roll 88 respectively.
  • the base web 84 is formed on a third wire 90.
  • the third wire 90 may be of metal wire or plastic fabric, and forms a continuous loop around two lower guide rolls 92, a forming roll 94 and a couch roll 96.
  • a second headbox 98 is supplied with stock 60 by a supply duct 100.
  • the stock 60 is identical to the stock 60 supplied to the upper sub-chamber 44 of the first headbox 34.
  • the slice 102 of the second headbox 98 has an opening 104 positioned over the forming roll 94 and leading into a fourdrinier table 106.
  • the second headbox 98 supplies stock 60, preferably composed of unbleached or semi-bleached low value fiber, to the fourdrinier table106 where it is dewatered by a suction box 108 to form the base web 84, indicated schematically as a series of dashes. Because the base web 84 and the base layer 110 of the multi-ply web 68 are composed of fibers of the same type (same furnish) which have been beaten or prepared in the same way for the same length of time (same freeness), the base Iayer110 will readily adhere to the base web 84 when joined thereto.
  • the joining is accomplished with the lower couch roll 78 together with web 68, which is opposed for a distance, and is in closely spaced engaged relation to the third wire 90, thus joining the base layer 110 to the base web 84, to form a multi-ply linerboard web 112.
  • a suction box 114 is located under the trailing edge 116 serves to assure the transfer of the web 68 onto the wire 90 super-positioned and in intimate contact with the base web 84.
  • the suction box 114 may also cause some moisture from the two-part web 68 to transfer downwardly through the base web 84, further ensuring a good bond between the layers.
  • the liner board web112 is removed from the wire 90 at the couch roll 96, where it passes into the pressing and drying section (not shown) of a papermaking machine.
  • both webs 68, 84 could contain a multiplicity of fiber layers, so long as the layers of fibers brought into opposition to form the bond between the web 68 and the base web 84 have the same furnish and freeness and thereby affect a tight bond without the necessity of a starch shower or the like.

Abstract

Two webs of paper (68, 84), without the necessity of a glue or starch shower, are joined together to form multi-ply linerboard (112). Two surfaces of two sheets having the same freeness and furnish are brought together and thus readily bonded together without a binder. To form multi-ply linerboard one of the webs is formed as a multi-ply web, one exterior ply of the multi-ply web matches the freeness and furnish of the other web and so bonds readily to it.

Description

PATENT APPLICATION
MACHINE AND METHOD FOR FORMING MULTI-PLY LINERBOARD
FROM TWO SHEETS
FIELD OF THE INVENTION This invention relates to papermaking machines. More particularly, this invention relates to papermaking machines for the manufacture of multi-ply linerboard.
BACKGROUND OF THE INVENTION Achieving an effective bond between the plys on multi-ply board formers has commonly presented a problem. One known method employs multi-web forming stock jets directed through a slice from a single headbox into a forming zone between converging forming surfaces in a papermaking machine. In this process, a multi-ply board is co-formed and limited intermixing between the layers forms a good bond between the layers. However, as the board thickness increases, dewatering and excessive mixing between the layers can be a problem.
In other linerboard machines hereto available, mini-fourdriniers and other twin-wire top formers form the top ply first and then bond it to the base sheet with a starch shower which bonds or glues the plies together. The use of costly starch showers and their inherent adverse effects on cleanliness, runnability and operating costs presents a less than ideal solution.
What is needed is an apparatus and method for forming multi-ply linerboard from two or more sheets which does not require gluing the sheets together. SUMMARY OF THE INVENTION The method and apparatus of this invention forms multi-ply linerboards from two webs of paper joined together. The webs are joined without the necessity of a glue or starch shower because the two surfaces of the two sheets which are brought together have the same freeness and furnish and will thus readily bond together without a binder.
Webs which have the same furnish are composed of identical fibers. Webs that have the same degree of freeness are formed of fibers that have been mechanically beaten for the same amount of time. Thus, webs that have the same freeness and furnish are webs that have been made from the same stock of pulp fibers suspended in water.
Multi-ply linerboard is normally constructed to have a high quality surface ply, suitable for printing or the like, and one or more additional plys formed of low cost, unbleached or waste fibers which add stiffness and bulk to the linerboard. Thus, the surface ply of high quality fibers and the base ply of low cost fibers will not normally bond without the imposition of a binder such as provided through a starch shower.
The present invention achieves the desired result by forming a top ply having a surface layer of high-quality bleached fibers and a lower layer of the same fiber composition as the base ply. When the composite top ply is brought into contact with the base ply, and the top ply lower layer which is of the same fiber composition as the base ply is pressed together with the base ply, a bond is formed therebetween.
/
It is an object of the present invention to provide an apparatus for forming a multi-layer web and co-joining it to another web without a binder. 0)
It is another object of the present invention to provide a method for forming multi-ply linerboard from two sheets, at least one of which is multi-layered.
It is a further object of the present invention to provide an apparatus and method for forming thicker linerboard.
It is yet another object of the present invention to provide a method and apparatus for forming multi-ply linerboard at higher web speeds.
Further objects, features, and advantages of the invention will be apparent from the following detailed description when taken in conjunction with the accompanying drawing.
BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is a somewhat schematic, side-elevational view of a forming section of a papermaking machine constructed and operated in accordance with the principles of the present invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT Referring more particularly to the Figure, wherein like numbers refer to similar parts, a multi-ply linerboard forming machine 10 is shown. A top ply of linerboard is formed between a first looped forming wire 20 and a second looped forming wire 22. The looped forming wires 20, 22 may be of metal wire or plastic fabric, and are arranged to travel in runs defined by guide rolls.
The upper breast roll 26 and the lower breast roll 28 are guide rolls over which the second wire 22 and the first wire 20 turn and which bring the forming wires 20, 22 into opposition. The opposed wires 20, 22 define a forming throat 30 which leads into a forming zone 32. A headbox 34 has a slice 36 which directs two streams of paper-forming stock into the forming throat 30 through a slice opening 38. The slice 36 communicates with the main chamber 40 of the headbox 34. A wall 42 in the main chamber divides the headbox 32 into an upper sub-chamber 44 and a lower sub-chamber 46. The slice main chamber 40 is defined by spaced walls 48, 50. A baffle 52 extends at an angle from the wall 42 and divides the slice main chamber 40 into an upper flow channel 54 and a lower flow channel 56. The upper flow channel 54 is aligned with and communicates with the upper sub-chamber 44. The lower flow channel 56 communicates with the lower sub-chamber 46.
The upper sub-chamber 44 has a supply duct 58 which supplies the upper headbox sub-chamber 44 with a first stock 60, which will preferably be of an unbleached or semi-bleached low value fiber.
The lower sub-chamber 46 has a lower supply duct 62 which supplies a second stock 64, preferably of a bleached, high value fiber. The unbleached stock 60 is injected into the forming throat 30 through the upper flow channel 54, and the bleached stock 64 is injected into the throat 30 through the lower flow channel 56. The slice baffle 52 keeps the two fibers separated as they are ejected through the slice opening 38 into the forming throat 30.
A suction box 66 is located adjacent to the forming throat 30 and serves to dewater the stock to form a paper web 68, shown schematically in the drawing as a series of dots. As the web 68 progresses through the forming zone 32, it is progressively dewatered by an upper skimmer blade 70. The skimmer blade rides on the upper wire 20 and deflects water into a save-all 72. One or more additional suction boxes 74 are positioned downstream of the skimmer blade 70 to continue dewatering the web 68. The web 68 then passes between an upper couch roll 76 and a lower couch roll 78. The web 68 is retained on the surface 79 of the second wire 22 which is wrapped around the lower couch roll 78 by a suction gland 80. The Suction gland 80 has a suction control means 82 so as to control the amount of water removed from the web 68. In this manner, the web 68 can be left sufficiently moist for optimal bonding with a base web 84. After the upper wire and lower wire 22 pass over the couch rolls 76, 78, they return by an upper guide roll 86 and a lower guide roll 88 respectively.
The base web 84 is formed on a third wire 90. The third wire 90 may be of metal wire or plastic fabric, and forms a continuous loop around two lower guide rolls 92, a forming roll 94 and a couch roll 96. A second headbox 98 is supplied with stock 60 by a supply duct 100. The stock 60 is identical to the stock 60 supplied to the upper sub-chamber 44 of the first headbox 34. The slice 102 of the second headbox 98 has an opening 104 positioned over the forming roll 94 and leading into a fourdrinier table 106.
The second headbox 98 supplies stock 60, preferably composed of unbleached or semi-bleached low value fiber, to the fourdrinier table106 where it is dewatered by a suction box 108 to form the base web 84, indicated schematically as a series of dashes. Because the base web 84 and the base layer 110 of the multi-ply web 68 are composed of fibers of the same type (same furnish) which have been beaten or prepared in the same way for the same length of time (same freeness), the base Iayer110 will readily adhere to the base web 84 when joined thereto. The joining is accomplished with the lower couch roll 78 together with web 68, which is opposed for a distance, and is in closely spaced engaged relation to the third wire 90, thus joining the base layer 110 to the base web 84, to form a multi-ply linerboard web 112. A suction box 114 is located under the trailing edge 116 serves to assure the transfer of the web 68 onto the wire 90 super-positioned and in intimate contact with the base web 84. The suction box 114 may also cause some moisture from the two-part web 68 to transfer downwardly through the base web 84, further ensuring a good bond between the layers. The liner board web112 is removed from the wire 90 at the couch roll 96, where it passes into the pressing and drying section (not shown) of a papermaking machine.
It should be understood that wherein the multi-ply web 68 is shown as having two layers, and wherein the base web 84 is shown as composed of a single ply of fiber, both webs 68, 84 could contain a multiplicity of fiber layers, so long as the layers of fibers brought into opposition to form the bond between the web 68 and the base web 84 have the same furnish and freeness and thereby affect a tight bond without the necessity of a starch shower or the like.
It should also be understood that various methods of forming two paper webs fall within the scope of this invention, so long as one web is composed of at least two layers, one layer of which has the same furnish and freeness as one layer of a second web, wherein the layers of similar furnish and freeness are joined.
It should be understood that wherein a fiber board is described as composed of multi-plys comprising bleached and unbleached fibers, other liner boards combining various fiber types could be constructed in accordance with this invention.
It is understood that the invention is not confined to the particular construction and arrangement of parts herein illustrated and described, but embraces such modified forms thereof as come within the scope of the following claims.

Claims

CLAIMSI claim:
1. An apparatus for making two paper webs from stocks having a slurry of fibers in a liquid carrier and joining them to form a multi-ply sheet comprising: a first looped forming wire (20) and a second looped forming wire (22); a first guide (26) and a second guide (28) within the first forming wire (20) and the second forming wire (22) respectively, wherein the guides train the wires to define a forming run (32) therebetween; a first headbox (34) having a main chamber (40) communicating with a slice chamber (36) defined by spaced walls (48,50) which lead to a slice opening (38), wherein the main chamber (40) is divided into at least a first stock sub-chamber (44) and a second stock sub-chamber (46); a first stock (60) which is supplied to the first stock sub-chamber (44), and a second stock (64) which is supplied to the second stock sub-chamber (46), wherein the furnish and freeness of the first and second stocks are different; at least one divider (52) in the slice chamber (36) dividing the slice chamber (40) into separate flow passages (54,56) aligned with different headbox sub-chambers to receive streams of the first and second stocks (60,64) from the first sub-chamber (44) and the second sub-chamber (46) respectively, wherein the divider (52) maintains the streams separated, and wherein each of the flow passages (54,56) leads to a slice opening (38) for discharging the streams into the forming zone (30) to form a multi-ply paper web having a bottom layer formed of the first stock (60), and a top layer formed of the second stock (64); a third looped forming wire (90) having a stock receiving surface (106); and a second headbox (98) which is supplied with stock of substantially the same freeness and furnish as the first stock (60), wherein the second headbox (98) has a slice (102) positioned to discharge stock onto the stock receiving surface (106) of the third wire (90) for forming a second web of paper, and wherein the second wire (22) has a surface (79) on which the first paper web (68) is retained after the second wire (22) travels through the forming run, and wherein the third wire surface (106) is conveyed to engage the first web (68) arrayed on the second wire surface (79), and wherein the engagement of the first web (68) and the second web (84) brings the lower layer (110) of the first web (68) into contact with the second web (84) to join the first web to the second web to form a multi-ply sheet.
2. The method of Claim 1 wherein the first stock (60) of fiber is comprised of unbleached fibers, and wherein the second stock (64) of fibers is comprised of bleached fibers.
3. The apparatus of Claim 1 further comprising a suction box (66) positioned beneath the third wire (90) where it is opposed to the second wire (22).
4. The apparatus of Claim 1 further comprising at least one suction box positioned beneath the second looped forming wire within the forming run (32).
5. The apparatus of Claim 1 further comprising a skimmer blade (70) positioned to overlie the first forming wire (20) as it passes through the forming run (32), and to remove water from a web formed therebetween.
6. The apparatus of Claim 6 further comprising a save-all (72) positioned in receiving relation beneath the skimmer blade (70) for receiving water.
7. A method of forming a multi-ply paperboard sheet comprising the steps of: forming a first multi-layered web (68) composed of at least two fiber types (60,64), wherein a lower fiber layer (110) in the web is formed of a first fiber; forming a second web (84) of a second fiber (64), the second fiber having a furnish and freeness substantially the same as the first fiber; bringing the first web lower fiber layer into opposition with the second web (84); and pressing the first web (68) and the second web (84) together, so forming a bond without the necessity of a binder to produce a multi-ply sheet.
8. The method of Claim 7 wherein the first fiber type (60) and the second fiber type (62) are the same and have identical furnish and freeness.
9. The method of Claim 7 wherein the second web (84) is composed of unbleached fiber.
10. The method of Claim 7 wherein the first multi-layer web (68) is formed from a layer of bleached, high value fibers and the lower layer is formed of unbleached, low value fibers.
11. The method of Claim 7 wherein the first multi-layer web (68) is formed between two wires (20,22) which define a forming zone (32).
12. The method of Claim 7 wherein the step of forming a first multi-layer web comprises the steps of: supplying two different fiber stocks (60,64) to a multi-chamber headbox; passing the two different stocks through a slice which keeps the stocks separate; and injecting the two stocks through a slice opening into a forming zone between two opposed wires.
13. An apparatus for forming multi-ply linerboard comprising: a first headbox (34) divided into at least a first sub-chamber (44) and a second sub-chamber (46); a first stock (60) which is supplied to the first headbox first sub-chamber (44); a second stock (64) of a freeness and furnish which is different than the freeness and furnish of the first stock (60), wherein the second stock (64) is supplied to the first headbox second chamber (46); a first looped forming wire (20) which travels over a plurality of rotatable rollers; a second looped forming wire (22) which travels over a plurality of rotatable rollers, wherein the first forming wire (20) and the second forming wire (22) are turned by respective rollers to define a narrowing throat (30) which receives the first stock (60) and the second stock (64) which are discharged from the first headbox (34); a forming zone (32) defined between the two forming wires (20,22) subsequent to the throat (30) in which the two forming wires (20,22) are engaged on either side of the discharged stocks to form the stocks into a top web (68) having an upper layerformed of the first stock (60) and a lower layer formed of the second stock (64); a third looped forming wire (90); and a second headbox (98) supplied with a third stock of substantially the same freeness and furnish as the second stock (64), wherein the second headbox (98) discharges the third stock onto the third forming wire (90) to form a bottom web (84), and wherein the third forming wire (90) conveys the bottom ply and engages the bottom web (84) with the top web (68) on the second forming wire (22), such that the top web lower layer is engaged and pressed together with the bottom web which is substantially the same freeness and furnish to form a single linerboard web (112).
14. The apparatus of Claim 13 further comprising means for drawing suction on the second wire (22) subsequent to the forming zone (32) to cause the top ply to travel along the second wire (22) and separate from the first wire (20) prior to engagement with the third wire (90).
PCT/US1994/014039 1993-12-08 1994-12-05 Machine and method for forming multi-ply linerboard from two sheets WO1995016070A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU12663/95A AU1266395A (en) 1993-12-08 1994-12-05 Machine and method for forming multi-ply linerboard from two sheets

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US16451893A 1993-12-08 1993-12-08
US08/164,518 1993-12-08

Publications (1)

Publication Number Publication Date
WO1995016070A1 true WO1995016070A1 (en) 1995-06-15

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MY (1) MY131659A (en)
WO (1) WO1995016070A1 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0761874A2 (en) * 1995-08-23 1997-03-12 Voith Sulzer Papiermaschinen GmbH Device for making multilayer paper or cardboard
WO1998048111A1 (en) * 1997-04-22 1998-10-29 Beloit Technologies, Inc. A forming apparatus for forming a web
DE10122047A1 (en) * 2001-05-07 2002-11-14 Voith Paper Patent Gmbh Sheet forming device and method
WO2012041392A1 (en) * 2010-10-01 2012-04-05 Metso Paper, Inc. Device and method for manufacturing a web consisting of multiple layers
WO2012103547A1 (en) * 2011-01-28 2012-08-02 Donaldson Company, Inc. Method and apparatus for forming a fibrous media
US9121118B2 (en) 2011-01-28 2015-09-01 Donaldson Company, Inc. Method and apparatus for forming a fibrous media
US9353481B2 (en) 2009-01-28 2016-05-31 Donldson Company, Inc. Method and apparatus for forming a fibrous media
SE1951507A1 (en) * 2019-12-19 2021-06-20 Stora Enso Oyj A light weight linerboard for corrugated board
WO2022221897A1 (en) * 2021-04-21 2022-10-27 Mondi Ag Printable, multi-layered paper for packaging and process for production thereof

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US3994771A (en) * 1975-05-30 1976-11-30 The Procter & Gamble Company Process for forming a layered paper web having improved bulk, tactile impression and absorbency and paper thereof
EP0312512A1 (en) * 1987-10-16 1989-04-19 SCA Nordliner AB Method of making three-layer paper
EP0511186A1 (en) * 1991-04-23 1992-10-28 International Paper Company Method of producing multi-ply paper and board products exhibiting increased stiffness

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
US3994771A (en) * 1975-05-30 1976-11-30 The Procter & Gamble Company Process for forming a layered paper web having improved bulk, tactile impression and absorbency and paper thereof
EP0312512A1 (en) * 1987-10-16 1989-04-19 SCA Nordliner AB Method of making three-layer paper
EP0511186A1 (en) * 1991-04-23 1992-10-28 International Paper Company Method of producing multi-ply paper and board products exhibiting increased stiffness

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0761874A2 (en) * 1995-08-23 1997-03-12 Voith Sulzer Papiermaschinen GmbH Device for making multilayer paper or cardboard
EP0761874A3 (en) * 1995-08-23 1998-01-14 Voith Sulzer Papiermaschinen GmbH Device for making multilayer paper or cardboard
WO1998048111A1 (en) * 1997-04-22 1998-10-29 Beloit Technologies, Inc. A forming apparatus for forming a web
DE10122047A1 (en) * 2001-05-07 2002-11-14 Voith Paper Patent Gmbh Sheet forming device and method
EP1262596A2 (en) * 2001-05-07 2002-12-04 Voith Paper Patent GmbH Forming section and process for forming a sheet
EP1262596A3 (en) * 2001-05-07 2005-02-09 Voith Paper Patent GmbH Forming section and process for forming a sheet
US9885154B2 (en) 2009-01-28 2018-02-06 Donaldson Company, Inc. Fibrous media
US9353481B2 (en) 2009-01-28 2016-05-31 Donldson Company, Inc. Method and apparatus for forming a fibrous media
US10316468B2 (en) 2009-01-28 2019-06-11 Donaldson Company, Inc. Fibrous media
WO2012041392A1 (en) * 2010-10-01 2012-04-05 Metso Paper, Inc. Device and method for manufacturing a web consisting of multiple layers
WO2012103547A1 (en) * 2011-01-28 2012-08-02 Donaldson Company, Inc. Method and apparatus for forming a fibrous media
CN103328720A (en) * 2011-01-28 2013-09-25 唐纳森公司 Method and apparatus for forming a fibrous media
US9121118B2 (en) 2011-01-28 2015-09-01 Donaldson Company, Inc. Method and apparatus for forming a fibrous media
US9303339B2 (en) 2011-01-28 2016-04-05 Donaldson Company, Inc. Method and apparatus for forming a fibrous media
SE1951507A1 (en) * 2019-12-19 2021-06-20 Stora Enso Oyj A light weight linerboard for corrugated board
WO2021124040A1 (en) * 2019-12-19 2021-06-24 Stora Enso Oyj A light weight linerboard for corrugated board
SE543829C2 (en) * 2019-12-19 2021-08-03 Stora Enso Oyj A light weight linerboard for corrugated board
WO2022221897A1 (en) * 2021-04-21 2022-10-27 Mondi Ag Printable, multi-layered paper for packaging and process for production thereof

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Publication number Publication date
MY131659A (en) 2007-08-30
AU1266395A (en) 1995-06-27

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