CN1208515C - Arrangment and method for forming multilayered paper or paperboard web - Google Patents
Arrangment and method for forming multilayered paper or paperboard web Download PDFInfo
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- CN1208515C CN1208515C CN00817192.0A CN00817192A CN1208515C CN 1208515 C CN1208515 C CN 1208515C CN 00817192 A CN00817192 A CN 00817192A CN 1208515 C CN1208515 C CN 1208515C
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F9/00—Complete machines for making continuous webs of paper
- D21F9/003—Complete machines for making continuous webs of paper of the twin-wire type
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
- D21F11/02—Processes 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
- D21F11/04—Processes 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
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F9/00—Complete machines for making continuous webs of paper
- D21F9/003—Complete machines for making continuous webs of paper of the twin-wire type
- D21F9/006—Complete machines for making continuous webs of paper of the twin-wire type paper or board consisting of two or more layers
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F9/00—Complete machines for making continuous webs of paper
- D21F9/02—Complete machines for making continuous webs of paper of the Fourdrinier type
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Abstract
The invention relates to an arrangement for forming a multilayered paper or paperboard web (D) from stock suspensions with papermaking fibres and fines, said arrangement including at least a first (101; 201; 301; 401; 501) and a second (102; 202; 302; 402; 502) forming unit, at least one of the forming units being of twin wire type and having a forming roll for forming a fibrous web (A or B) having a higher content of fines at one side (x or z) than at the other (y or w), and a couch device (117; 217; 316; 317; 416, 417) for couching together said fibrous web (A or B) having a higher content of fines at one side with an other fibrous web (B or A) to form the multilayered web (D), wherein both of the two forming units are of twin wire type and include a forming roll (109; 209; 309; 409; 509 and 111; 211; 311; 411; 511) for forming a fibrous web (A and B) having a higher content of fines at one side (x and z) than at the other (y and w), and that the two forming units (101; 201; 301; 401; 501 and 102, 202; 302; 402; 502) are so arranged relative to each other as to place the web sides (x and z) having the highest content of fines in contact with each other for couching together to form the multilayered web (D). The invention further relates to a method of forming a multilayered paper or paperboard web using said arrangement.
Description
Technical field
The present invention relates to a kind of from the paper of pulp suspension shaping multilayer or the device of cardboard with paper fibre and microfibre, described device comprises at least one first and one second forming unit and a couch roll device, at least one is two net formula forming units in the forming unit, and has a forming rolls of the width of cloth web of fiber that is used to be shaped, the one side of web of fiber has higher microfibre content than another side, and the couch roll device is used to make described web of fiber and another width of cloth fibre web layer that has higher microfibre content in one side to build up the multi-layer fiber width of cloth.
The invention still further relates to a kind ofly from the pulp suspension with paper fibre and microfibre the be shaped paper of a width of cloth multilayer or the method for board web, this method may further comprise the steps:
-its one side of a width of cloth that is shaped on first forming unit with a forming rolls of two net formulas has first web of fiber of higher microfibre content than another side,
-one second web of fiber that on one second forming unit, is shaped, and
-the fibre web layer that will be shaped builds up the multi-layer fiber width of cloth.
The present invention is particularly suitable for forming test liner, corrugated paper, liner, " white top " liner, grey gummed paper dregs of rice plate liner and is the cardboard of base-material with the circulation pulp fibers.Certainly, the present invention's paper or board web of other type that also can be used for being shaped.
Background technology
When producing multi-layer gasket and cardboard, for example be known that paper machine make the so-called fourdriner forming unit of board machine or two net formula forming unit on shaping bottom and top layer (one or more layers), then these are built up layer by layer the paper web of a width of cloth combination, in conjunction with paper web squeeze and carry out drying at press section at drying section.
The finished product that is known that shaping top layer and bottom on the fourdriner forming unit and obtains, the finished product that obtains than shaping top layer and bottom on two net formula forming units has higher internal bond strength usually, i.e. interfacial bonding strength.
Document DE2020688 proposes a kind of method in conjunction with two width of cloth paper, cardboard or suchlike article, the laminating method of more specifically saying so, and a kind of device that makes is in this way proposed.This method comprises that two width of cloth send before same direction during it is made, and place the method on the front of first width of cloth to carry out combination with the wire side of second width of cloth.
The device that document DE2020688 proposes comprises movable fourdrinier wire and at least one net of cycle arrangement on fourdrinier wire as second net as first net.Each net moves along the direction opposite with fourdrinier wire at the minimum position at its networking, and wherein, each circulation net contacts the circulation net and contacts fourdrinier wire in its front with a transferring roller feed, transferring roller wire side outside.Therefore, according to document DE2020688, superiority is, a total surface of one width of cloth paper web of this method manufacturing is the characteristic that presents the page front, for example compares and improved printability with a wire side, wherein, in conjunction with more than two width of cloth, also be this situation in this way.
Document DE4031038A1 proposes a kind ofly to be arranged in the device of making multi-ply paper or couch board on this as second net of two net forming units by one first net and one, and a front of multi-ply paper or cardboard is formed on the bottom.Therefore, two net forming units have one as the forming rolls of breast roll to constitute two nets.Have a pressure to apply parts in the forming rolls upstream arrangement, wherein, the waterline of pulp suspension is positioned within the forming rolls zone.According to document DE4031038A1, because the dried content of top layer is lower when being laminated to bottom, therefore, the device that is proposed can obtain higher internal bond strength.
Document US 5607555 proposes a kind of paper machine forming unit with two net forming units of two width of cloth multi-layer webs that are used to be shaped.Each two net forming unit comprises that a flow box, two limit the net loop at a shared networking that the paper web that is shaped in the interlayer mode is formed and the drainage spare that is used for each net loop.The shared networking of each forming unit has one first section and one second section, and first section comprises curved surface suction drainage spare or the drainage roller in the first off line loop, and second section comprises relative drainage flange.Therefore, the drainage flange is used for flexiblely being pressed in bottom side in the upper side transfixion.The drainage flange of side is along the traffic direction layout interlaced with each other of net up and down, and wherein, the drainage flange of upper side is used for suction at least.And, disposing at least one the 3rd section, the 3rd section has at least one suction net separator at a wire side.Two net forming units are arranged to, and in all cases, identical drainage spare is all to the drainage that layer carries out of the interior wire side that will become each layer of the multilayer width of cloth and outer wire side.According to document US 5607555, well-proportioned paper like this can be shaped.It is reported that contained filler and/or fiber can move towards the outside of paper web layer by means of the drainage flange of suitably arranging as required.Therefore, on two wire sides of the layer of being close to each other, a large amount of fibers is arranged, it is characterized in that these layers have good adhesive force therebetween after stacked.
But, it is found that the internal bond strength on the Z direction may be not enough at multi-ply paper that is shaped on the known devices or cardboard.
One of its reason is that many known devices are used the drainage spare that produces very high shearing in the pulp suspension of dehydration.The example of this drainage spare is vacuum forming roller and the suction box with the water filter plate that produces high vacuum.High shearing in the pulp suspension can reduce obtaining the recoverable amount of the very important microfibre material of high internal bond strength, faces the ply of paper of this drainage spare or the microfibre content of ply of board aspect when perhaps significantly reducing dehydration to I haven't seen you for ages.Like this, often be difficult to make finished paper or finished product cardboard to obtain sufficiently high internal bond strength.
Summary of the invention
Therefore, an object of the present invention is to propose a kind of paper of multilayer or the building mortion of board web, this device makes the recoverable amount of microfibre reach maximum when included a plurality of layers form in to paper web, and the aspect of guaranteeing to have the layer of the highest microfibre content is laminated to each other, thereby improves the internal bond strength of multi-ply paper or board web.
This purpose of the present invention can reach by following configuration: a kind of from the paper of pulp suspension shaping multilayer with paper fibre and microfibre or the device of board web, described device comprises at least one first forming unit and one second forming unit and a couch roll device, forming unit has the forming rolls of the width of cloth web of fiber that is used to be shaped, the one side of web of fiber has higher microfibre content than another side, and described couch roll device is used to make described web of fiber and another width of cloth fibre web layer that has higher microfibre content in one side to build up the multi-layer fiber width of cloth; It is characterized in that two forming units all are two net formula forming units, two forming units are arranged opposite to each other, and the breadth with the highest microfibre content is contacted with each other, to be laminated into the multi-layer fiber width of cloth; Each forming unit has a forming rolls, an Intranet and an outer net, Intranet and outer net are around the part periphery of each correspondingly configured roller, make first web of fiber carry out the initial curved surface section in the district that is shaped of preliminary hydro-extraction and shaping thereby form, it has an interior wire side and the outer wire side by the outer net supporting by the Intranet supporting, then a section of curved surface section has auxiliary drainage spare, these auxiliary drainage spares are used for the continuous dehydration of the shaped fibers width of cloth, wherein, is furnished with the vacuum transfer device, be used to make web of fiber to be combined into a width of cloth multi-layer fiber width of cloth, the multi-layer fiber width of cloth constitutes described multi-ply paper or board web in squeezing and dry back; Described forming rolls is open, be suitable for during preliminary hydro-extraction, making the interior wire side of web of fiber higher microfibre content to be arranged than outer net mask, the microfibre high-load at wire side place kept constant substantially at least in auxiliary drainage spare was suitable for making during continuous dehydration, forming unit is arranged opposite to each other, make two width of cloth the shaped fibers width of cloth along with interior wire side is close to and combination each other.
Second purpose of the present invention is the manufacturing process that proposes a kind of multi-ply paper or board web, this method makes the recoverable amount of microfibre reach maximum when included a plurality of layers form in to paper web, and the aspect of guaranteeing to have the layer of the highest microfibre content is laminated to each other, thereby improves the internal bond strength of multi-ply paper or board web.
This second purpose of the present invention can reach by the following method:
A kind of from the paper of pulp suspension shaping multilayer with paper fibre and microfibre or the method for board web, this method comprises:
-its one side of a width of cloth that is shaped on first forming unit with a forming rolls of two net formulas has first web of fiber of higher microfibre content than another side,
-one second web of fiber that on one second forming unit, is shaped, and
-the fibre web layer that will be shaped builds up the multi-layer fiber width of cloth,
It is characterized in that,
-the two net forming units with a forming rolls are used as second forming unit,
-be shaped it simultaneously has second web of fiber of higher microfibre content than another side, and
-that web of fiber is positioned to guarantee that the wire side with the highest microfibre content of web of fiber carries out is stacked, to be shaped as the multi-layer fiber width of cloth;
Described method also comprises dewaters the pulp suspension with paper fibre and microfibre on one first forming unit and one second forming unit, each forming unit is a two net formula forming unit, has a forming rolls, an Intranet and an outer net, Intranet and outer net are around the part periphery of each correspondingly configured roller, make first web of fiber carry out the initial curved surface section in the district that is shaped of preliminary hydro-extraction and shaping thereby form, it has an interior wire side and the outer wire side by the outer net supporting by the Intranet supporting, described method also is included in a section in curved surface section downstream, by auxiliary drainage spare the web of fiber that has been shaped is carried out continuous dehydration, and make web of fiber be combined into a width of cloth multi-layer fiber width of cloth by the vacuum transfer device, the multi-layer fiber width of cloth constitutes a width of cloth multi-ply paper or a board web in squeezing and dry back; Select the open forming rolls that carries out preliminary hydro-extraction for use, make these forming rolls be suitable for make during the preliminary hydro-extraction web of fiber interior wire side place with outside the wire side place have the same high microfibre content at least, make auxiliary drainage spare be suitable for during continuous dehydration, making in the microfibre high-load at wire side place keep constant substantially at least, make two width of cloth the shaped fibers width of cloth along with interior wire side is close to and combination each other.
Should be pointed out that the saying of employed " open forming rolls " here, be meant if possible, then on forming rolls, carry out double side dewatering and do not carry out any outer absorbent member.
Known in those skilled in the artly be, when the network speed of two net forming units increases, to reach such stage: gravity becomes so big so that the outer inward pressure that is produced by tension force on the net no longer can extrude moisture by Intranet, and dehydration is undertaken by outer net fully.In this case, be necessary in forming rolls, to produce negative pressure, so that can carry out partial dehydration at least by Intranet.Only under the situation that does not have gravity, just can carry out the dehydration of symmetry fully.
Therefore, the saying of employed here " open forming rolls ", also comprise embodiments of the invention, wherein, use one and have the suction forming rolls that lower negative pressure has medium negative pressure at the most, dewater by outer net fully avoiding with high network speed, but in these embodiments, cross in Netcom during the peripheral curved surface of forming rolls, net tension force still produces bigger drainage and impacts.
Other purpose of the present invention will be better understood by following description.
Description of drawings
Describe the present invention with reference to the accompanying drawings in greater detail.Accompanying drawing is as follows:
Fig. 1 is the side view of the first favourable configuration of apparatus of the present invention,
Fig. 2 is the side view of the second favourable configuration of apparatus of the present invention,
Fig. 3 is the side view of the 3rd favourable configuration of apparatus of the present invention,
Fig. 4 is the side view of the sharp configuration of having ideals, morality, culture, and discipline of apparatus of the present invention,
Fig. 5 illustrates some key steps in the preferred embodiment of the inventive method,
Fig. 6 is the chart that the relative percentage of the microfibre that the variation of the thickness from bottom BO to top T O with first web of fiber changes is shown, wherein, first web of fiber is shaped on a forming unit of apparatus of the present invention, the test specimen that is used to analyze microfibre content was extracted before being attached on second web of fiber
Fig. 7 is the side view of a preferred embodiment of apparatus of the present invention.
The specific embodiment
Different embodiment below with reference to Fig. 1 to 7 pair of apparatus of the present invention are described.
Apparatus of the present invention comprise one first forming unit 101; 201; 301; 401 and one second forming units 102; 202; 302; 402, wherein, each forming unit is a two net formula forming unit, has a forming rolls 109; 209; 309; 409 and 111; 211; 311; 411, Intranet 105; 205; 305; 405 and 107; 207; 307; 407 and outer nets 106; 206; 306; 406 and 108; 208; 308; 408, Intranet and outer net are around the part periphery of each correspondingly configured roller, make the first web of fiber A and B carry out the initial curved surface section in the district that is shaped of preliminary hydro-extraction and shaping thereby form, it has interior wire side X and Z and an outer wire side Y and the W by the outer net supporting by the Intranet supporting.Then a section of curved surface section has auxiliary drainage spare 110; 210; 310; 410 and 112; 212; 312; 412, drainage spare is used for the continuous dehydration of shaped fibers width of cloth A and B, wherein, is furnished with vacuum transfer device 113,114,115; 213,214,215; 313,314,315,327; 413,414,415,427, be used to make web of fiber A, B combination, to form a width of cloth multi-layer fiber width of cloth C, multi-layer fiber width of cloth C constitutes multi-ply paper or board web D in squeezing and dry back.
Therefore, according to the present invention, forming rolls 109; 209; 309; 409 and 111; 211; 311; 411 is open, is suitable for making web of fiber A at the dehydration initial stage, and the microfibre content among the B is wire side Y and W place outside interior wire side X and Z place are higher than, and auxiliary drainage spare 110; 210; 310; 410 and 112; 212; 312; 412 be suitable for during continuous dehydration, making in the microfibre high-load at wire side X and Z place keep constant substantially at least, forming unit 101; 201; 301; 401 and 102; 202; 302; 402 are arranged opposite to each other, and like this, two width of cloth are shaped fibers width of cloth A, and B is along with interior wire side X and Z are close to and combination each other.
Vacuum in the above-mentioned open forming rolls of apparatus of the present invention and the prior-art devices or suction forming rolls are opposite, be suitable for " easing up " dehydration, substantially without any shearing, and can make that the high-load microfibre remains to continuous dehydration always in the pulp suspension in suspension.But, microfibre may appear in the pulp suspension along the phenomenon of carrying out redistribution to a certain degree towards the direction of forming rolls.
The strong especially auxiliary drainage spare of the applicability of apparatus of the present invention at interior wire side without any the member that the produces high shearing member of water filter plate and so on for example.Therefore, wire side place in the microfibre of main content still remains on during continuous dehydration.During continuous dehydration, the sub-fraction microfibre may from pulp suspension, be sucked into wire side for example outside on the wire side, superior in apparatus of the present invention is to be furnished with auxiliary drainage spare here.Apparatus of the present invention reach at utmost the microfibre content that is kept when a plurality of layers in the paper web are formed, guarantee to have the high-load microfibre layer wire side for example in wire side be laminated to each other, multi-ply paper of Cheng Xinging or board web have bigger internal bond strength than paper that is shaped in the prior-art devices or board web like this, therefrom.
In a most preferred embodiment, is furnished with the auxiliary drainage spare 110 that is used to finish web of fiber A and B shaping; 210; 310; 410 and 112; 212; 312; 412.In this specification, thereby when the major part of all free waters was removed the paper that is shaped as combination, shaping can be thought and finishes.In this embodiment, auxiliary drainage spare all is arranged in outer net 106; 206; 306; 406 and 108; 208; 308; 408 places are used for making the web of fiber dehydration from outer wire side Y and W.
Above-mentioned auxiliary drainage spare 110; 210; 310; 410 and 112; 212; 312; 412 especially preferably include suction flat box, and suction flat box has one or more being suitable in conjunction with the preceding region of no pressure that removes whole free waters from web of fiber A and B substantially.But, within the scope of the present invention, also can adopt the embodiment of auxiliary drainage spare with other type.
As shown in Figure 7, in a most preferred embodiment of apparatus of the present invention 500, the diameter of forming rolls 509,511 is about 1.4 meters to 1.8 meters, and the net winding angle is at least 80 ° so that preliminary hydro-extraction.Therefore, one or more vacuum transfer devices 513,514 are configured for the auxiliary drainage spare of continuous dehydration.Like this, the device among this embodiment comprises the forming rolls that has than major diameter and bigger net winding angle, thereby effectively dewaters, and has very high mass dryness fraction after the preliminary hydro-extraction.In this embodiment, because the paper web that uses identical member to carry out between continuous dehydration and the net shifts, so can simplification device.
According to another most preferred embodiment, apparatus of the present invention comprise flow box 103,104; 203,204; 303,304; 403,404, forming rolls 109,111; 209,211; 309,311; 409,411, auxiliary drainage spare 110,112; 210,212; 310,312; 410,412 and net 105,107; 205,207; 305,306,307,308; 405,406,407,408, they are preferably in first forming unit 101; 201; 301; 401 and second forming unit 102; 202; 302; All identical in 402.In this embodiment, because can reduce Spare Part quantity to greatest extent, has bigger cost advantage.
In a more superior embodiment, apparatus of the present invention also comprise live-roller 116,117; 216,217; 316,317; 416,417, corrector roll 118,119; 218,219; 318,319; 418,419, idler roller 120,121; 220,221; 320,321; 420,421, they are at first forming unit 101; 201; 301; 401 and second forming unit 102; 202; 302; All identical in 402.Obviously, also may be embodied to corrector roll is exactly live-roller, and perhaps idler roller plays corrector roll.In this embodiment, the cost of deposit replacement part is very low.
In a superior especially embodiment, first forming unit 101; 201; 301; 401 and second forming unit 102; 202; 302; 402 is identical substantially.
In other embodiments, shown in Fig. 1,2,5, apparatus of the present invention also comprise one with the first web of fiber A from first forming unit 101; 201 Intranet 105; 205 transfer to outer net 106; 206 the first vacuum transfer device 113; 213, one with the second web of fiber B from second forming unit 102; 202 Intranet 107; 207 transfer to outer net 108; 208 the second vacuum transfer device 114,214 and one with the second web of fiber B from second forming unit 102; 202 outer net 108; 208 transfer to the three vacuum transfer device 115,215 of the first web of fiber A with shaping multi-layer fiber width of cloth C.In described embodiment, the task of these vacuum transfer devices is not to dewater, and only is that a width of cloth web of fiber is transferred to another net from a net.
In other embodiments, shown in Fig. 3,4,5, apparatus of the present invention 300; 400 comprise that one is used at least one spacer screen 330; On 430 shaping one deck bottom E, have an auxiliary flow box 329; 429 bottom forming unit 328; 428, wherein, at least one vacuum transfer device 313,413 is transferred to spacer screen 330 with the first web of fiber A; On the bottom E on 430.In this embodiment, especially superior is apparatus of the present invention 300; 400 comprise at least one with the first web of fiber A from first forming unit 301; 401 outer net 306; 406 transfer to Intranet 305; 405 assisted vacuum transfer device 327,427.Obviously, the bottom forming unit also comprises suitable drainage spare 331; 431.
In other embodiments, shown in Fig. 2,4,5, apparatus of the present invention 200; 400 also comprise a top layer forming unit 222; 422 and assisted vacuum transfer devices 226,426, top layer forming unit 222; 422 have an auxiliary flow box 223; 423, be used at least one top net 224; Shaping one deck top layer F on 424, assisted vacuum transfer device 226,426 is transferred to top layer F on the second web of fiber B, with shaping multi-layer fiber width of cloth C.Obviously, the top layer forming unit also comprises suitable drainage spare 325; 425.
The above-mentioned vacuum transfer device or the assisted vacuum transfer device of apparatus of the present invention preferably include suction flat box 113,114,115; 213,214,215,226; 313,314,315,327; 413,414,415,426,427 and/or the vacuum dehydration roller.
Difference below with reference to the manufacturing process of Fig. 1 to 7 pair of multi-ply paper of the present invention or board web
Embodiment is described.
The inventive method comprises that the pulp suspension with pulp fiber and microfibre is at one first forming unit 101; 201; 301; 401 and one second forming units 102; 202; 302; Dewater on 402.Each forming unit is a two net formula forming unit, has a forming rolls 109; 209; 309; 409 and 111; 211; 311; 411, Intranet 105; 205; 305; 405 and 107; 207; 307; 407 and outer nets 106; 206; 306; 406 and 108; 208; 308; 408, Intranet and outer net are around the part periphery of each correspondingly configured roller, make the first web of fiber A and B carry out the initial curved surface section in the district that is shaped of preliminary hydro-extraction and shaping thereby form, it has interior wire side X and Z and an outer wire side Y and the W by the outer net supporting by the Intranet supporting.After this, a section in curved surface section downstream is by auxiliary drainage spare 110; 210; 310; 410 and 112; 212; 312; 412 couples of web of fiber A, B that have been shaped carry out continuous dehydration, and after this, web of fiber A, B are by vacuum transfer device 113,114,115; 213,214,215; 313,314,315,327; 413,414,415,427 carry out combination, and to form a width of cloth multi-layer fiber width of cloth C, multi-layer fiber width of cloth C constitutes a width of cloth multi-ply paper or board web D in squeezing and dry back.
According to the present invention, open forming rolls 109,111; 209,211; 309,311; 409,411 select the forming rolls that carries out preliminary hydro-extraction for use, are suitable for making during preliminary hydro-extraction web of fiber A, B interior wire side X and Z place with outside wire side Y and W place have the same high microfibre content at least, and auxiliary drainage spare 110,112; 210,212; 310,312; 410,412 be suitable for during continuous dehydration, making in the microfibre high-load at wire side X and Z place keep constant substantially at least, wherein, two width of cloth are shaped fibers width of cloth A, B is along with interior wire side X and Z are close to and combination each other.
At one of the inventive method preferably among the embodiment, behind the preliminarily dried, the dried content of pulp suspension is 2% to 3%.
In a most preferred embodiment of the inventive method, continuous dehydration mainly occurs on the direction of the outer wire side Y of web of fiber A and B and W.In this embodiment, the microfibre that is kept is wanting stacked interior wire side X and Z place to reach high as far as possible content, thereby has big as far as possible internal bond strength after stacked.
Continuous dehydration especially preferably makes the mass dryness fraction of web of fiber A and B greater than about 6% to 8%.Under the situation than higher dried content like this, shaping can be thought and finishes, and handles even will stand high vacuum (for example suction) after the web of fiber, and it is stable that the microfibre in the web of fiber also can keep.
In a most preferred embodiment of the inventive method, especially as shown in Figure 7, select for use diameter to be about 1.4 meters to 1.8 meters forming rolls 509,511.Therefore, the net winding angle is at least 80 °, and wherein, after the preliminary hydro-extraction, the dried content of pulp suspension is about 6%.Behind the continuous dehydration, the dried content of web of fiber A and B is greater than about 6% to 8%, and continuous dehydration is finished by the one or more vacuum transfer devices in the vacuum transfer device 513,514.
In an advantageous embodiments of the inventive method, some vacuum transfer devices 113,114; 213,214; 313,314,327; 413,414,427 carry out the auxiliary dehydration behind the continuous dehydration, make web of fiber A and the B mass dryness fraction before in being attached to multi-layer fiber width of cloth C greater than 8% to 10% about.In this embodiment, adopt the inventive method and the interior wire side X that obtains and the microfibre high-load at Z place make it to have high internal bond strength.
In other embodiment of the inventive method, especially shown in Fig. 1,2,5, the first web of fiber A is from first forming unit 101; 201 Intranet 105; 205 are transferred to outer net 106; 206, and the second web of fiber B is from second forming unit 102; 202 Intranet 107; 207 are transferred to outer net 108; 208, so that be transferred to therefrom on the first web of fiber A.
In other embodiment of the inventive method, especially shown in Fig. 3,4,5, the inventive method also is included at least one spacer screen 330; Shaping one deck bottom E on 430, and comprise that after this first web of fiber A is transferred on the bottom E.In this embodiment, especially superior is that the first web of fiber A is first from first forming unit 301 before being transferred; 401 outer net 306; 406 are transferred to Intranet 305; 405.
In other embodiment of the inventive method, especially shown in Fig. 2,4,5, the inventive method also is included at least one top net 224; Shaping one deck top layer F on 424, and comprise that after this top layer F is transferred on the second web of fiber B.
The present invention never is limited to the description of doing in conjunction with each different embodiment, also is not limited to embodiment shown in the drawings, and the scope of the invention will be limited in claims of back.
Apparatus of the present invention 100 shown in Figure 1 be particularly suitable for being shaped have one deck quantitatively for 30-100 gram/square metre top layer and one deck quantitatively for 50-150 restrain/square metre the trial liner or the corrugated paper of bottom.But, when the paper web of other type of be shaped wanting stacked two-layer different layer or board web, also can use this device.As shown in Figure 1, because some parts of two two net formula forming units 101,102 are identical in two parts, thus this apparatus structure compactness, the cost efficiency height.Because forming rolls 110,111 is open, and is not the vacuum dehydration roller, therefore, the bigger redistribution phenomenon of microfibre can not take place in the pulp suspension, can obtain the uniform relatively paper of structure on the Z direction.And at shaping, what auxiliary drainage spare 110,112 only acted on web of fiber A and B does not carry out stacked outer wire side Y and W.Therefore, in the relative high-load of wanting microfibre on stacked interior wire side X and the Z (see figure 5) that remains unchanged.
Apparatus of the present invention 200 shown in Figure 2 be particularly suitable for being shaped liner, " white top " liner or grey gummed paper dregs of rice plate liner.But, when the paper web of other type of be shaped wanting stacked three layers of different layer or board web, also can use this device.Device 200 can be called " face down " formula building mortion, because one deck top layer is shaped on two net formula forming units 201, one deck middle level is shaped on two net formula forming units 202, and one deck bottom is shaped on fourdriner forming unit 222.Top layer quantitatively be preferably 40-80 gram/square metre, the middle level be preferably the 55-170 gram/square metre, bottom be preferably the 30-50 gram/square metre, still, also can adopt other quantitative scope.
Apparatus of the present invention 300 shown in Figure 3 be particularly suitable for being shaped liner, " white top " liner or grey gummed paper dregs of rice plate liner.But, when the paper web of other type of be shaped wanting stacked three layers of different layer or board web, also can use this device.Opposite with device shown in Figure 2, device shown in Figure 3 is " facing up " formula building mortion, that is: one deck bottom is shaped on fourdriner forming unit 328, and one deck middle level is shaped on two net formula forming units 301, and one deck top layer is shaped on two net formula forming units 302.Bottom quantitatively be preferably 43-80 gram/square metre, the middle level be preferably the 55-155 gram/square metre, top layer be preferably the 40-65 gram/square metre, still, also can adopt other quantitative scope.
Apparatus of the present invention 400 shown in Figure 4 be particularly suitable for being shaped liner or cardboard, cardboard based on recycled fibre is particularly suitable for being shaped.But, when the paper web of other type of be shaped wanting stacked four layers of different layer (opening) or board web, also can use this device.In device shown in Figure 4, one deck bottom is shaped on fourdriner forming unit 428, one deck individual layer middle level or one deck first middle level are shaped on two net formula forming units 402, one deck backing layer or one deck second middle level are shaped on two net formula forming units 402, and one deck top layer is shaped on fourdriner forming unit 422.Above-mentioned bottom quantitatively be preferably 25-90 gram/square metre, above-mentioned individual layer middle level be preferably 40-200 gram/square metre, above-mentioned first middle level be preferably 60-180 gram/square metre, above-mentioned backing layer be preferably 30-90 gram/square metre, above-mentioned second middle level be preferably 60-180 gram/square metre, above-mentioned top layer be preferably 30-60 gram/square metre, still, also can adopt other quantitative scope.
During included different assembly, these need not to be known structure and effect, the prior art assembly that proposes in for example above-mentioned document in relating to apparatus of the present invention.
The figure of Fig. 6 expresses the relative percentage of the microfibre that the variation of the thickness from bottom BO to top T O with first web of fiber changes, wherein, first web of fiber is shaped on a forming unit of apparatus of the present invention, and the test specimen that is used to analyze microfibre content gave extracting before being attached on second web of fiber.
As shown in Figure 6, the relative ratios of the microfibre of sample bottom BO enters the thickness Z of sample a little a little less than maximum rate 100%, wherein, should be pointed out that sample bottom BO is interior wire side.
As shown in Figure 6, the relative percentage of the microfibre of sample top T O (promptly outer wire side) is lower than bottom BO, but still than higher.
Two width of cloth web of fibers of microfibre distribution situation shown in Figure 6 are close to each other with wire side BO in it and stacked together if having, and then acquisition has the very multi-ply paper of the present invention or the board web of high internal bond strength after squeezing and drying.And the higher microfibre content in outer wire side TO place makes it also can have high internal bond strength after being laminated to other layer.
Should be pointed out that the device 100 shown in Fig. 1 to 4 and 7; 200; 300; 400; 500 at its forming rolls 109,111; 209,211; 309,311; 409,411; Is furnished with so-called forming board 132,133 in the Intranet loop in 509,511 downstreams with supporting plate; 232,233; 332,333; 432,433; 532,533.But the forming table/supporting plate shown in the figure does not provide any drainage function.
Claims (22)
1. one kind from the paper of pulp suspension shaping multilayer with paper fibre and microfibre or the device of board web (D), and described device comprises at least one first forming unit (101; 201; 301; 401; 501) and one second forming unit (102; 202; 302; 402; 502) and a couch roll device (117; 217; 316,317; 416,417), forming unit has the forming rolls of a width of cloth web of fiber (A or the B) that is used to be shaped, the one side (X or Z) of web of fiber (A or B) has higher microfibre content than another side (Y or W), and described couch roll device is used to make the described web of fiber (A or B) that has higher microfibre content in one side to be laminated into the multi-layer fiber width of cloth (D) with another width of cloth web of fiber (B or A); It is characterized in that two forming units all are two net formula forming units, two forming units (101; 201; 301; 401; 501 and 102; 202; 302; 402; 502) be arranged opposite to each other, the breadth with the highest microfibre content is contacted with each other, to be laminated into the multi-layer fiber width of cloth (D); Each forming unit has a forming rolls (109; 209; 309; 409; 509 and 111; 211; 311; 411; 511), Intranet (105; 205; 305; 405 and 107; 207; 307; 407) and an outer net (106; 206; 306; 406 and 108; 208; 308; 408), Intranet and outer net are around the part periphery of each correspondingly configured roller, make first web of fiber (A and B) carry out the initial curved surface section in the district that is shaped of preliminary hydro-extraction and shaping thereby form, it has an interior wire side (X and Z) and the outer wire side (Y and W) by the outer net supporting by the Intranet supporting, and then a section of curved surface section has auxiliary drainage spare (110; 210; 310; 410; 513 and 112; 212; 312; 412; 514), these auxiliary drainage spares are used for the continuous dehydration of the shaped fibers width of cloth (A and B), wherein, are furnished with vacuum transfer device (113,114,115; 213,214,215; 313,314,315,327; 413,414,415,427; 513,514,515), be used to make web of fiber (A and B) to be combined into a width of cloth multi-layer fiber width of cloth (C), the multi-layer fiber width of cloth (C) constitutes described multi-ply paper or board web (D) in squeezing and dry back; Described forming rolls (109,111; 209,211; 309,311; 409,411; 509,511) be open, be suitable for during preliminary hydro-extraction, making the interior wire side (X and Z) of web of fiber (A and B) to have higher microfibre content, auxiliary drainage spare (110,112 than outer wire side (Y and W); 210,212; 310,312; 410,412; 513,514) the microfibre high-load that is suitable for interior wire side (X and Z) is located keeps constant substantially, forming unit (101 at least; 201; 301; 401; 501 and 102; 202; 302; 402; 502) be arranged opposite to each other, make two width of cloth the shaped fibers width of cloth (A and B) along with interior wire side (X and Z) is close to and combination each other.
2. device according to claim 1, wherein, described auxiliary drainage spare (110,112; 210,212; 310,312; 410,412) finish the shaping of described web of fiber (A and B), it is characterized in that described auxiliary drainage spare is arranged in outer net (106,108 all; 206,208; 306,308; 406,408), be used for making web of fiber (A and B) dehydration from outer wire side (Y and W).
3. device according to claim 1 and 2 is characterized in that, auxiliary drainage spare (110,112; 210,212; 310,312; 410,412) comprise suction flat box, suction flat box has one or more being suitable in conjunction with the preceding region of no pressure that removes whole free waters from web of fiber (A and B) substantially.
4. device according to claim 1, it is characterized in that, forming rolls (509,511) diameter is 1.4 meters to 1.8 meters, net is at least 80 ° so that preliminary hydro-extraction around the winding angle of forming rolls, one or more vacuum transfer devices (513,514) constitute the described auxiliary drainage spare that is used for continuous dehydration.
5. device according to claim 1 is characterized in that described device comprises flow box (103,104; 203,204; 303,304; 403,404), forming rolls (109,111; 209,211; 309,311; 409,411), auxiliary drainage spare (110,112; 210,212; 310,312; 410,412) and net (105,107; 205,207; 305,306,307,308; 405,406,407,408), they are at first forming unit (101; 201; 301; 401) and second forming unit (102; 202; 302; 402) all identical in.
6. device according to claim 1 is characterized in that described device comprises live-roller (116,117; 216,217; 316,317; 416,417), corrector roll (118,119; 218,219; 318,319; 418,419) and idler roller (120,121; 220,221; 320,321; 420,421), they are at first forming unit (101; 201; 301; 401) and second forming unit (102; 202; 302; 402) all identical in.
7. device according to claim 1 is characterized in that, first forming unit (101; 201; 301; 401) and second forming unit (102; 202; 302; 402) identical.
8. device according to claim 1 is characterized in that, described device also comprise one with first web of fiber (A) from first forming unit (101; 201) Intranet (105; 205) transfer to outer net (106; 206) the first vacuum transfer device (113; 213), one with second web of fiber (B) from second forming unit (102; 202) Intranet (107; 207) transfer to outer net (108; 208) the second vacuum transfer device (114,214) and one with second web of fiber (B) from second forming unit (102; 202) outer net (108; 208) transfer to the three vacuum transfer device (115,215) of first web of fiber (A) with the shaping multi-layer fiber width of cloth (C).
9. device according to claim 1 is characterized in that, described device (300; 400) comprise that one is used at least one spacer screen (330; 430) go up shaping one deck bottom (E), have an auxiliary flow box (329; 429) bottom forming unit (328; 428), at least one vacuum transfer device (313,413) is transferred to spacer screen (330 with first web of fiber (A); 430) on the bottom on (E).
10. device according to claim 9 is characterized in that, described device (300; 400) comprise at least one with first web of fiber (A) from first forming unit (301; 401) outer net (306; 406) transfer to Intranet (305; 405) assisted vacuum transfer device (327,427).
11. device according to claim 1 is characterized in that, described device (200; 400) also comprise a top layer forming unit (222; 422) and an assisted vacuum transfer device (226,426), top layer forming unit (222; 422) has an auxiliary flow box (223; 423), be used at least one top net (224; 424) go up shaping one deck top layer (F), assisted vacuum transfer device (226,426) is transferred to top layer (F) on second web of fiber (B), with the shaping multi-layer fiber width of cloth (C).
12. device according to claim 1 is characterized in that, described vacuum transfer device or assisted vacuum transfer device comprise suction flat box (113,114,115; 213,214,215,226; 313,314,315,327; 413,414,415,426,427) and/or the vacuum dehydration roller.
13. one kind from the paper of pulp suspension shaping multilayer with paper fibre and microfibre or the method for board web (D), this method comprises:
-at the forming rolls (109 that has of two net formulas; 209; 309; 409; 509) first forming unit (101; 201; 301; 401; 501) its one side (X) of a width of cloth that go up to be shaped has first web of fiber (A) of higher microfibre content than another side (Z),
-at one second forming unit (102; 202; 302; 402; 502) go up one second web of fiber (B) that is shaped, and
-the web of fiber (A and B) that will be shaped is laminated into the multi-layer fiber width of cloth (D),
It is characterized in that,
-have a forming rolls (111 with one; 211; 311; 411; 511) two net forming units are as second forming unit (102; 202; 302; 402; 502),
-its one side (Y) that is shaped has second web of fiber (B) of higher microfibre content than another side (W), and
-that web of fiber (A and B) is positioned to guarantee that the wire side with the highest microfibre content (X and Z) of web of fiber carries out is stacked, to be shaped as the multi-layer fiber width of cloth (D);
Described method also comprises makes the pulp suspension with paper fibre and microfibre at one first forming unit (101; 201; 301; 401; 501) and one second forming unit (102; 202; 302; 402; 502) dewater on, each forming unit is a two net formula forming unit, has a forming rolls (109; 209; 309; 409; 509 and 111; 211; 311; 411; 511), Intranet (105; 205; 305; 405 and 107; 207; 307; 407) and an outer net (106; 206; 306; 406 and 108; 208; 308; 408), Intranet and outer net are around the part periphery of each correspondingly configured roller, make first web of fiber (A and B) carry out the initial curved surface section in the district that is shaped of preliminary hydro-extraction and shaping thereby form, it has an interior wire side (X and Z) and the outer wire side (Y and W) by the outer net supporting by the Intranet supporting, described method also is included in a section in curved surface section downstream, by auxiliary drainage spare (110; 210; 310; 410; 513 and 112; 212; 312; 412; 514) web of fiber (A and B) that has been shaped is carried out continuous dehydration, and by vacuum transfer device (113,114,115; 213,214,215; 313,314,315,327; 413,414,415,427; 513,514,515) make web of fiber (A and B) be combined into a width of cloth multi-layer fiber width of cloth (C), the multi-layer fiber width of cloth (C) constitutes a width of cloth multi-ply paper or board web (D) in squeezing and dry back; It is characterized in that, select the open forming rolls (109,111 that carries out preliminary hydro-extraction for use; 209,211; 309,311; 409,411; 509,511), make these forming rolls be suitable for make during the preliminary hydro-extraction web of fiber (A and B) interior wire side (X and Z) locate with outside wire side (Y and W) locate to have at least the same high microfibre content, make auxiliary drainage spare (110,112; 210,212; 310,312; 410,412; 513,514) the microfibre high-load that is suitable for interior wire side (X and Z) is located keeps constant substantially at least, make two width of cloth the shaped fibers width of cloth (A and B) along with interior wire side (X and Z) is close to and combination each other.
14. method according to claim 13 is characterized in that, carries out preliminary hydro-extraction, the mass dryness fraction that makes described pulp suspension is 2% to 3%.
15. according to claim 13 or 14 described methods, it is characterized in that, mainly carry out continuous dehydration along direction towards the outer wire side (Y and W) of web of fiber (A and B).
16., it is characterized in that according to claim 13 or 14 described methods, carry out continuous dehydration, the mass dryness fraction that makes web of fiber (A and B) is greater than 6% to 8%.
17. method according to claim 13, it is characterized in that, selecting diameter for use is 1.4 meters to 1.8 meters forming rolls (509,511), and the winding angle that is suitable for making net center on forming rolls is at least 80 °, carry out preliminary hydro-extraction, the mass dryness fraction that makes described pulp suspension is 6%, carries out continuous dehydration, and the mass dryness fraction that makes web of fiber (A and B) is greater than 6% to 8%, carry out continuous dehydration by one or more vacuum transfer devices (513,514).
18. according to claim 13 or 14 described methods, it is characterized in that, use some vacuum transfer devices (113,114; 213,214; 313,314,327; 413,414,427) carry out auxiliary dehydration behind the continuous dehydration, make the mass dryness fraction of web of fiber (A and B) before in being attached to the multi-layer fiber width of cloth (C) greater than 8% to 10%.
19. according to claim 13 or 14 described methods, it is characterized in that, with first web of fiber (A) from first forming unit (101; 201) Intranet (105; 205) transfer to outer net (106; 206), with second web of fiber (B) from second forming unit (102; 202) Intranet (107; 207) transfer to outer net (108; 208), so that transfer to therefrom on first web of fiber (A).
20. according to claim 13 or 14 described methods, it is characterized in that, also at least one spacer screen (330; 430) go up shaping one deck bottom (E), after this first web of fiber (A) is transferred on the bottom (E).
21. method according to claim 20 is characterized in that, shift first web of fiber (A) before earlier with described first web of fiber (A) from first forming unit (301; 401) outer net (306; 406) transfer to Intranet (305; 405).
22. according to claim 13 or 14 described methods, it is characterized in that, also at least one top net (224; 424) go up shaping one deck top layer (F), after this described top layer (F) is transferred on second web of fiber (B).
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE99046054 | 1999-12-15 | ||
| SE9904605A SE516329C2 (en) | 1999-12-15 | 1999-12-15 | Multilayered paper or paperboard web formation arrangement comprises two twin wire type forming units with forming roll to form fibrous web with higher fine content at one side, arranged relative to each other |
| US17197999P | 1999-12-23 | 1999-12-23 | |
| US60/171,979 | 1999-12-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1409787A CN1409787A (en) | 2003-04-09 |
| CN1208515C true CN1208515C (en) | 2005-06-29 |
Family
ID=26663696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00817192.0A Expired - Fee Related CN1208515C (en) | 1999-12-15 | 2000-12-15 | Arrangment and method for forming multilayered paper or paperboard web |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP1266087B1 (en) |
| JP (1) | JP2003528990A (en) |
| CN (1) | CN1208515C (en) |
| AT (1) | ATE334259T1 (en) |
| AU (1) | AU778169B2 (en) |
| CA (1) | CA2394283C (en) |
| DE (1) | DE60029639T2 (en) |
| WO (1) | WO2001044569A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10232125A1 (en) * | 2002-07-16 | 2004-02-05 | Voith Paper Patent Gmbh | Sieve section for the production of a multi-layer fibrous web |
| DE102008040688A1 (en) * | 2008-07-24 | 2010-01-28 | Voith Patent Gmbh | Method for optimizing the energy balance in forming units in machines for producing fibrous webs and forming unit |
| WO2012041392A1 (en) * | 2010-10-01 | 2012-04-05 | Metso Paper, Inc. | Device and method for manufacturing a web consisting of multiple layers |
| JP5716378B2 (en) * | 2010-12-17 | 2015-05-13 | 王子ホールディングス株式会社 | Fiber sheet manufacturing equipment |
| CN104213476B (en) * | 2014-08-18 | 2016-08-31 | 湖北欧华达纤维科技股份有限公司 | The environmental friendly regenerated fibre board of high density and production method thereof |
| AT519242B1 (en) * | 2017-02-03 | 2018-05-15 | Andritz Ag Maschf | METHOD FOR PRODUCING A MULTILAYER FIBROUS WEB WITH WHITE COVERING |
| CN107460760B (en) * | 2017-09-13 | 2019-03-01 | 长兴恒大电子材料有限公司 | A kind of heat transfer paper production and processing technology |
| DE102022107202A1 (en) | 2022-03-28 | 2023-09-28 | Voith Patent Gmbh | Multi-layer fibrous web |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1722503A (en) * | 1925-07-06 | 1929-07-30 | William H Millspaugh | Paper-making method and machine |
| US5468348A (en) * | 1990-07-10 | 1995-11-21 | Beloit Technologies, Inc. | Multi-ply web former and method |
| DE4031038C2 (en) * | 1990-10-01 | 1997-01-23 | Voith Sulzer Papiermasch Gmbh | Device for producing a multilayer paper or cardboard |
| DE4402273C2 (en) * | 1994-01-27 | 1995-11-23 | Voith Gmbh J M | Paper machine for the production of multilayer paper webs |
| DE4402274C2 (en) * | 1994-01-27 | 1995-04-06 | Voith Gmbh J M | Twin-wire section |
| DE19651493A1 (en) * | 1996-12-11 | 1998-06-18 | Voith Sulzer Papiermasch Gmbh | Sieve section and method for forming a multi-layer fibrous web |
| DE19920438A1 (en) * | 1999-05-04 | 2000-11-09 | Voith Sulzer Papiertech Patent | Production of multi-layer paper or cardboard web, uses separate stock inlets and double-fourdrinier zones for each layer to be couched into multi-layer web using only three fourdriniers for two layers |
-
2000
- 2000-12-15 CA CA002394283A patent/CA2394283C/en not_active Expired - Fee Related
- 2000-12-15 EP EP00986164A patent/EP1266087B1/en not_active Expired - Lifetime
- 2000-12-15 AU AU22450/01A patent/AU778169B2/en not_active Ceased
- 2000-12-15 WO PCT/SE2000/002570 patent/WO2001044569A1/en active IP Right Grant
- 2000-12-15 JP JP2001545644A patent/JP2003528990A/en not_active Ceased
- 2000-12-15 CN CN00817192.0A patent/CN1208515C/en not_active Expired - Fee Related
- 2000-12-15 DE DE60029639T patent/DE60029639T2/en not_active Expired - Lifetime
- 2000-12-15 AT AT00986164T patent/ATE334259T1/en active
Also Published As
| Publication number | Publication date |
|---|---|
| AU2245001A (en) | 2001-06-25 |
| CA2394283A1 (en) | 2001-06-21 |
| AU778169B2 (en) | 2004-11-18 |
| EP1266087B1 (en) | 2006-07-26 |
| CN1409787A (en) | 2003-04-09 |
| CA2394283C (en) | 2008-08-12 |
| ATE334259T1 (en) | 2006-08-15 |
| WO2001044569A1 (en) | 2001-06-21 |
| DE60029639D1 (en) | 2006-09-07 |
| JP2003528990A (en) | 2003-09-30 |
| EP1266087A1 (en) | 2002-12-18 |
| DE60029639T2 (en) | 2007-07-26 |
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