EP0881329A2 - Verfahren und Vorrichtung zum Hinzufügen von dünnen Fasern in der Pressenpartie einer Papiermaschine - Google Patents

Verfahren und Vorrichtung zum Hinzufügen von dünnen Fasern in der Pressenpartie einer Papiermaschine Download PDF

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Publication number
EP0881329A2
EP0881329A2 EP98303888A EP98303888A EP0881329A2 EP 0881329 A2 EP0881329 A2 EP 0881329A2 EP 98303888 A EP98303888 A EP 98303888A EP 98303888 A EP98303888 A EP 98303888A EP 0881329 A2 EP0881329 A2 EP 0881329A2
Authority
EP
European Patent Office
Prior art keywords
paper
minute
fiber suspension
suspension
press section
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.)
Withdrawn
Application number
EP98303888A
Other languages
English (en)
French (fr)
Other versions
EP0881329A3 (de
Inventor
Akimine c/o Mitsubishi Heavy Ind. Ltd. Izawa
Makio c/o Mitsubishi Heavy Ind. Ltd. Hasuike
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Publication of EP0881329A2 publication Critical patent/EP0881329A2/de
Publication of EP0881329A3 publication Critical patent/EP0881329A3/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/24—Addition to the formed paper during paper manufacture
    • D21H23/26—Addition to the formed paper during paper manufacture by selecting point of addition or moisture content of the paper
    • D21H23/28—Addition before the dryer section, e.g. at the wet end or press section
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H15/00—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution
    • D21H15/02—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution characterised by configuration

Definitions

  • the present invention relates to a method and an apparatus for adding minute (fine) fibers or both of minute fibers and a paper strength increasing agent onto the surface of a wet paper at a press section of a paper machine for printing paper etc.
  • FIG. 11 shows a conventionally used paper machine for printing paper.
  • a pulp liquid 1 with a concentration of about 0.9% is ejected onto a wire 3 at a former section A from a head box 2 as a jet which is uniform in the width direction.
  • the pulp liquid 1 is dehydrated through the meshes of the wire 3 by the gravity and negative pressure, and a wet paper 4 is formed on the wire 3.
  • the wet paper 4 is conveyed to a press section B of the next process.
  • the wet paper 4 is held between felts 5a and 5b, or put on the felt 5b, and pressurized by rolls or the like to remove water. Further, after the concentration is increased up to about 40 to 50% through a plurality of press stages, the wet paper 4 is sent to a dryer section C.
  • the wet paper 4 is pressed against the surface of a dryer roll 6 heated by steam, by which water is removed from the wet paper 4 by evaporation to produce a dried paper.
  • This paper is wound around a reel 7.
  • FIG. 11 shows a paper manufacturing process in which minute fibers, paper force increasing agent, and the like are not added.
  • the quality items required for printing paper are smoothness and surface strength. If the smoothness is low, the ink sticking property is deteriorated. If the surface strength is low, fibers coming off from the paper surface accumulate on a plate cylinder, blanket, and the like, which causes whiteness.
  • the lightweight (low basis weight) of printing paper has been demanded strongly from the viewpoint of effective use of pulp resource.
  • the paper thickness is decreased, leading to a decrease in paper rigidity.
  • a paper strength increasing agent such as starch or minute fibers are usually added inside or outside.
  • the term “adding inside” means the addition of minute fibers or paper strength increasing agent to the pulp before a paper is formed, and the term “adding outside” means the addition of minute fibers or paper strength increasing agent to an already formed paper (wet paper or dry paper).
  • FIG. 12 shows a conventional manufacturing process in which a paper strength increasing agent such as starch is added outside.
  • the paper strength increasing agent such as starch is applied to the paper by using an applying apparatus such as a 2-roll size press 8 or a gate roll coater (not shown) installed at a size press section D on the downstream side of the dryer section C as shown in FIG. 12. and then the paper is dried at an after-dryer section E and wound around the reel 7.
  • FIG. 13 shows a conventional manufacturing process in which minute fibers are added outside.
  • a minute fiber suspension 10 is added onto the surface of the wet paper 4 by being ejected from 1-fluid or 2-fluid minute fiber suspension supply sprays 9 installed at the former section A or press section B as shown in FIG. 13. Subsequently, the paper passes through the same processes as those shown in FIG. 11, and is wound around the reel 7.
  • the printing paper especially requires the smoothness, surface strength, and rigidity.
  • a method in which a paper strength increasing agent such as starch or minute fibers are added inside or outside has so far been used.
  • these substances when these substances are added inside to the pulp liquid 1 in the head box 2, these substances flow out through the meshes of the wire 3 together with water when the paper is dehydrated at the former section A, and part of the substances is thrown away without being recovered. Therefore, the amount of the paper strength increasing agent or minute fibers added inside must be increased, resulting in an increase in the cost of added substances.
  • a paper strength increasing agent such as starch and polyacrylamide must be applied to the paper by using an applying apparatus such as a 2-roll size press 8 (see FIG. 12) or a gate roll coater (not shown) installed following the dryer section C as described above.
  • an applying apparatus such as a 2-roll size press 8 (see FIG. 12) or a gate roll coater (not shown) installed following the dryer section C as described above.
  • the applying apparatus and drying apparatus such as the after-dryer section E must be additionally installed, so that the equipment cost and the running cost of after-dryer section E is increased.
  • 1-fluid or 2-fluid minute fiber suspension supply sprays 9 installed at the former section A or press section B are used as described above.
  • concentration of the minute fiber suspension 10 capable of being ejected by these sprays 9 is very low, being about 1.5% or less. Therefore, when the minute fiber suspension 10 is supplied to the surface of the wet paper 4 with the sprays 9, the dryness of wet paper is decreased, so that the dry load at the dryer section C of the subsequent process is increased significantly. If the existing dryer apparatus capacity cannot overcome the increase in dry load at the dryer section C, a dryer roll must be installed additionally.
  • the present invention was made in view of the above situation, and accordingly an object thereof is to provide a method and apparatus for adding minute fibers etc. at a press section of a paper machine, in which the smoothness, surface strength, and rigidity of paper can be improved by adding minute fibers or both of minute fibers and a paper strength increasing agent onto the surface of a wet paper, an increase in dry load of a dryer section can be restrained slightly, and the equipment cost and running cost can be reduced.
  • the present invention provides a method for adding minute fibers etc. at a press section of a paper machine, in which after a minute fiber suspension with a weight concentration of 3.0 to 5.0% is formed into a film shape on an applicator roll installed at the press section of the paper machine, the minute fiber suspension is applied onto the surface of a wet paper to add minute fibers of 0.2 to 2.0 g/m 2 per one surface on the paper surface.
  • the present invention provides a method for adding minute fibers etc. at a press section of a paper machine, in which after a paper strength increasing agent, which has been added inside to pulp in a head box or added outside to paper on an applying apparatus such as a size press in the conventional apparatus and method, is added beforehand to a minute fiber suspension with a weight concentration of 3.0 to 5.0% and a mixed suspension of the minute fiber suspension and paper strength increasing agent is formed into a film shape on an applicator roll installed at the press section of the paper machine, the mixed suspension is applied onto the surface of a wet paper to add both of minute fibers of 0.2 to 2.0 g/m 2 per one surface and paper strength increasing agent of 0.5 to 2.0 g/m 2 per one surface.
  • the present invention provides an apparatus for adding minute fibers etc. at a press section of a paper machine, comprising an applicator roll, which is disposed so as to face the surface of a press roll installed at the press section of the paper machine, for forming a minute fiber suspension film on the surface thereof and a minute fiber suspension supply box for supplying a minute fiber suspension to the surface of the applicator roll.
  • film thickness control means for controlling the thickness of suspension film formed on the surface of the applicator roll is provided at the suspension outlet of the minute fiber suspension supply box.
  • minute (fine) fiber means a minute size pulp fiber or pulp fiber chip with a length not more than about 300 ⁇ m.
  • a specific example of this "minute fiber” is a fiber contained in water discharged through the meshes of the wire 3 at a former sectionlllll of the paper machine.
  • paper strength increasing agent means a chemical (starch, polyacrylamide, etc.) which is added to the pulp liquid 1 in the head box 2 or applied to the paper surface to increase the strength of paper.
  • minute fiber has an effect of increasing the paper strength
  • the terms “minute fiber” and “paper strength increasing agent” are used in distinction from each other in this specification because the term “paper strength increasing agent” does not generally include a pulp fiber.
  • FIGS. 1 to 10 Embodiments of the present invention will be described below with reference to FIGS. 1 to 10.
  • the same reference numerals are applied to the same elements as those shown in FIGS. 11 to 13, and the explanation of these elements is omitted.
  • FIG. 1 is a view for illustrating a first embodiment of the present invention, showing a press section B of a paper machine having a minute fiber suspension applying apparatus 20 in accordance with the present invention.
  • This minute fiber suspension applying apparatus 20 which is additionally installed at the press section of a conventional paper machine to apply minute fibers onto the surface of a wet paper 4 at the press section B of the paper machine, is installed behind (on the downstream side of) paper machine press part 1P as shown in FIG. 1.
  • the aforesaid minute fiber suspension applying apparatus 20 is made up of an applicator roll 22 disposed so as to face a 1P top roll 21 composing paper machine press part 1P and a minute fiber suspension supply mechanism 23 disposed in relation to the applicator roll 22.
  • the minute fiber suspension supply mechanism 23 includes a minute fiber suspension supply box 24 for supplying the minute fiber suspension to the surface of the wet paper 4 and a film thickness control unit (film thickness control means) disposed at a minute fiber suspension outlet of the minute fiber suspension supply box 24.
  • film thickness control unit film thickness control means
  • the film thickness control unit 25 is made up of a plate spring 26 installed to the minute fiber suspension supply box 24, a rod holder 27 installed to the free end of the plate spring 26, a rod which is held by the rod holder 27 and disposed so as to face the applicator roll 22 with a small gap at the minute fiber suspension outlet, and an air tube 29 for giving an air pressure to the rod holder 27.
  • the air pressure acting on the rod holder 27 from the air tube 29 the pressure for pressing the rod 28 against the applicator roll 22 is regulated, and accordingly the gap between the rod 28 and the applicator roll 22, and in turn, the film thickness of the minute fiber suspension 30 passing therebetween can be regulated.
  • the minute fiber suspension supply box 24 performs a function of distributing minute fibers wholly in the width direction of paper machine and bringing them into contact with the surface of the applicator roll 22.
  • the rod 28 performs a function of controlling the thickness of minute fiber suspension film formed on the surface of the applicator roll 22 by the regulation of a pressing pressure against the applicator roll 22 or the gap between the rod 28 and the applicator roll 22.
  • the applicator roll 22 performs a function of transferring (applying) the minute fiber suspension film formed on the surface thereof to the wet paper 4.
  • a minute fiber suspension 30 (see FIG. 3) of a weight concentration of 3.0 to 5.0% is put into the minute fiber suspension supply box 24.
  • the minute fiber suspension 30 is discharged through the minute fiber suspension outlet of the minute fiber suspension supply box 24, and is made to pass through a gap between the applicator roll 22 (300 to 1000 mm in diameter) and the rod 28 (10 to 50 mm in diameter). Accordingly, as shown in FIG. 2, a minute fiber suspension film 31 consisting of the minute fiber suspension 30 of a weight concentration of 3.0 to 5.0% is formed on the surface of the applicator roll 22.
  • the minute fiber suspension film 31 on the surface of the applicator roll 22 is transferred to the back surface (wire surface) of the wet paper 4 at a nip portion between the 1P top roll 21 and the applicator roll 22 as shown in FIG. 2.
  • the wet paper 4 is conveyed to the 1P top roll 21 in a state such as to be held between a pair of felts 5a and 5b.
  • the wet paper 4 After the wet paper 4 comes into contact with the 1P top roll 21, the wet paper 4 together with the felt 5a on the side of the wet paper top surface is conveyed to the nip portion between the 1P top roll 21 and the applicator roll 22, where the minute fiber suspension film 31 on the surface of the applicator roll 22 is transferred (applied) onto the back surface of the wet paper 4 from the applicator roll 22.
  • the minute fibers transferred onto the back surface of the wet paper 4 in this manner pass through a plurality of press nips subsequently, by which the minute fibers are integrated by entering a fiber network composing the wet paper surface layer. Thereupon, a paper to which minute fibers are added can be obtained.
  • the film thickness of the minute fiber suspension film 31, which is formed on the surface of the applicator roll 22 and transferred to the wet paper 4, is controlled appropriately by the film thickness control unit 25 (see FIG. 3).
  • the air pressure of the air tube 29 is controlled, and the pressure at which the rod 28 is pressed against the applicator roll 22 is regulated, whereby the required thickness of the minute fiber suspension film 31 being transferred to the wet paper 4 is controlled.
  • the film thickness control means for the minute fiber suspension film 31 may be configured so that a small-diameter wire 34 is wound around the surface of the rod 28 of the film thickness control unit 25 shown in FIG. 3 as shown in FIG. 4, by which the amount of the minute fiber suspension 30 passing between the rod 28 and the applicator roll 22 is controlled.
  • FIG. 5 shows a second embodiment of the present invention.
  • This figure shows an example in which a minute fiber suspension applying apparatus 20a, 20b having the same configuration as that of the above-mentioned minute fiber suspension applying apparatus 20 is additionally installed at two locations behind (on the downstream side of) paper machine press part 1P and in front of (on the upstream side of) paper machine press part 4P at the press section B of the conventional paper machine. Since the configuration and operation of the minute fiber suspension applying apparatus 20a disposed behind paper machine press part 1P are the same as described above as shown in FIG. 6, the explanation is omitted.
  • the aforesaid minute fiber suspension applying apparatus 20b is installed in relation to an applicator roll 37 disposed corresponding to a backup roll 36 in front of paper machine press part 4P.
  • a minute fiber suspension film 38 is formed on the surface of the applicator roll 37.
  • the minute fiber suspension film 38 is transferred to the top surface (felt surface) of the wet paper 4 at a nip portion between the additionally installed applicator roll 37 and backup roll 36, and integrated by entering a fiber network composing the surface layer of the wet paper 4 when passing through a 4P press nip. Thereupon, a paper to which minute fibers are added can be obtained.
  • the thickness of the minute fiber suspension film 38 formed on the surface of the applicator roll 37 is controlled by a method in which the pressure at which the rod 28 is pressed against the applicator roll 37 is changed, like the aforesaid control of the thickness of the minute fiber suspension film 31 formed on the surface of the applicator roll 22, the thickness of the minute fiber suspension film 38 may be controlled by winding the small-diameter wire 34 around the rod 28 as shown in FIG. 4.
  • FIG. 8 shows a third embodiment of the present invention.
  • This figure shows a configuration in which a center roll 40 disposed at the press section is used as the aforementioned applicator roll 22, and a 4P top roll 41 disposed at the press section is used as the aforementioned applicator roll 37.
  • the center roll 40 is used as the applicator roll 22 for applying the minute fiber suspension to the back surface (wire surface) of wet paper
  • the 4P top roll 41 is used as the applicator roll 37 for applying the minute fiber suspension to the top surface (felt surface) of wet paper.
  • the minute fiber suspension 30 is applied to the wet paper 4 at the press section B, by which the minute fiber suspension film 31, 38 of a given thickness can be transferred to the surface of the wet paper 4 (see FIGS. 9 and 10).
  • a paper strength increasing agent such as starch may be put into the minute fiber suspension 30.
  • an applying apparatus for applying a suspension containing both of minute fibers and paper strength increasing agent is configured. Thereupon, a paper to which both of minute fibers and paper strength increasing agent are added can be obtained.
  • the proper amounts of the minute fibers and paper strength increasing agent applied to the paper surface are 0.2 to 2.0 g/m 2 and 0.5 to 2.0 g/m 2 per one surface, respectively.
  • the reason for this is as follows: If the adding amounts of the minute fibers and paper strength increasing agent are smaller than the above-mentioned proper amounts, the effect of improving the paper quality is not achieved. If the adding amounts are larger than the proper amounts, the effect of improving the paper quality is not achieved, only resulting in an increase in the cost of additive.
  • a high-concentration suspension with a weight concentration not lower than 3.0% can be applied.
  • the minute fibers are applied to the wet paper 4 by using sprays 9 (see FIG. 3) installed at the former section A or press section B. In this case, however, the minute fiber suspension cannot be supplied continuously because the minute fibers accumulate at the contracted portion near the spray jet and the spray 9 is clogged if the weight concentration of minute fiber suspension exceeds about 1.5%.
  • a roll-type applying apparatus (applying apparatus for the minute fiber suspension 30 or applying apparatus for the minute fiber suspension 30 and paper strength increasing agent) is configured so that an applied substance such as the minute fiber suspension 30 is formed as a film 31, 38 on the surface of the applicator roll 22, 37, and then it is transferred to the wet paper 4. Therefore, the contracting portion does not exist in the piping system for minute fibers (and paper strength increasing agent), so that the aforesaid "clogging" does not occur even if the weight concentration of the minute fiber suspension 30 is not lower than 3.0%, whereby the minute fiber suspension 30 can be supplied continuously. Thereupon, the minute fiber suspension 30 with a weight concentration not lower than 3.0% can be applied to the wet paper 4. As a result, by applying the high-concentration suspension 30 with a weight concentration not lower than 3.0% to the wet paper 4, an increase in dry load at the dryer section C can be restrained slightly.
  • an after-dryer section E is not needed, so that both of the equipment cost and running cost can be reduced.
  • the present invention is not limited to these embodiments, and various changes and modifications can be made on the basis of the technical concept of the present invention.
  • the suspension may be applied to both of top and back surfaces of the wet paper 4 as described above, but sometimes it can be applied to one surface thereof only.
  • the adding method in accordance with the present invention can achieve the following various effects described below.
  • the minute fiber suspension applied to the surface of the wet paper enters voids between the fibers composing the surface layer of wet paper to bury the irregularities on the surface of wet paper, and strengthens the bonding between the fibers, so that the smoothness, surface strength, and rigidity of paper can be improved.
  • the weight concentration of the minute fiber suspension applied to the surface of wet paper is high, being not lower than 3.0%, the increase in dry load of the dryer after application can be restrained slightly.
  • the adding method of the present invention defined in claim 2 after a paper strength increasing agent is added to a minute fiber suspension with a weight concentration of 3.0 to 5.0% and a mixed suspension of the minute fiber suspension and paper strength increasing agent is formed into a film shape on an applicator roll installed at the press section of the paper machine, the mixed suspension is applied onto the surface of a wet paper to add both of minute fibers of 0.2 to 2.0 g/m 2 per one surface and paper strength increasing agent of 0.5 to 2.0 g/m 2 per one surface. Therefore, according to the adding method in accordance with the present invention, by applying the paper strength increasing agent as well as the minute fibers to the wet paper, the effect of improving the surface strength and rigidity of paper can be further increased as compared with the invention defined in claim 1. Also, since the weight concentration of the mixed suspension of minute fibers and paper strength increasing agent is high, being not lower than 3.0% in this invention, the increase in dry load of the dryer after application can be restrained slightly as in the case of the invention defined in claim 1.
  • the adding apparatus comprises an applicator roll, which is disposed so as to face the surface of a press roll installed at the press section of the paper machine, for forming a minute fiber suspension film on the surface thereof and a minute fiber suspension supply box for supplying a minute fiber suspension to the surface of the applicator roll. Therefore, according to the adding apparatus in accordance with the present invention, the above-mentioned applying method of the present invention can be used, and the size press and after-dryer can be omitted, so that the equipment cost and running cost can be reduced.
  • film thickness control means for controlling the thickness of suspension film formed on the surface of the applicator roll is provided at the suspension outlet of the minute fiber suspension supply box. Therefore, according to the adding apparatus in accordance with the present invention, the suspension film of an appropriate thickness can be transferred (applied, added) to the surface of wet paper from the applicator roll depending on the material, type, and the like of wet paper by the operation of the film thickness control means.

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  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating Apparatus (AREA)
EP98303888A 1997-05-30 1998-05-18 Verfahren und Vorrichtung zum Hinzufügen von dünnen Fasern in der Pressenpartie einer Papiermaschine Withdrawn EP0881329A3 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP14122497 1997-05-30
JP14122497A JP3771673B2 (ja) 1997-05-30 1997-05-30 抄紙機のプレス部における微細繊維等の添加方法及び添加装置
JP141224/97 1997-05-30

Publications (2)

Publication Number Publication Date
EP0881329A2 true EP0881329A2 (de) 1998-12-02
EP0881329A3 EP0881329A3 (de) 1999-07-21

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EP98303888A Withdrawn EP0881329A3 (de) 1997-05-30 1998-05-18 Verfahren und Vorrichtung zum Hinzufügen von dünnen Fasern in der Pressenpartie einer Papiermaschine

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000055423A1 (en) * 1999-03-12 2000-09-21 Metso Paper, Inc. Method and apparatus for handling a paper or board web
EP1234912A2 (de) * 2001-02-13 2002-08-28 Mitsubishi Heavy Industries, Ltd. Auftragsvorrichtung und Verfahren zur Herstellung von beschichtetem Papier
CN105603802A (zh) * 2016-01-15 2016-05-25 烟台民士达特种纸业股份有限公司 一种高平滑绝缘用间位芳纶纸的制备方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101952508B (zh) * 2008-03-31 2013-01-23 日本制纸株式会社 制纸用添加剂和含有其的纸
JP5883393B2 (ja) * 2009-11-06 2016-03-15 ストラ エンソ オーワイジェイ 紙または板紙製品の製造方法およびこれらの方法に従い製造される紙または板紙
JP7032070B2 (ja) * 2017-07-21 2022-03-08 大王製紙株式会社 製紙方法

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US3146159A (en) * 1960-08-01 1964-08-25 Combined Locks Paper Co Method of coating paper with high solids high viscosity coating in the wet end of the paper making machine
WO1985003316A1 (en) * 1984-01-19 1985-08-01 Svenska Träforskningsinstitutet Paper with improved surface properties and method of making the same
US4793899A (en) * 1987-07-23 1988-12-27 Beloit Corporation Coating press apparatus using short dwell coaters
US5152872A (en) * 1990-10-15 1992-10-06 Stone-Consolidated Inc. Apparatus for the wet end coating of paper

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US4357370A (en) * 1981-03-27 1982-11-02 Beloit Corporation Twin short dwell coater arrangement
JPS58214595A (ja) * 1982-06-03 1983-12-13 富士写真フイルム株式会社 ピンホ−ルの少ない紙支持体
JP2950973B2 (ja) * 1990-11-27 1999-09-20 王子製紙株式会社 紙シート
JP3241076B2 (ja) * 1992-01-07 2001-12-25 三菱重工業株式会社 紙の製造方法
JPH05272097A (ja) * 1992-03-19 1993-10-19 New Oji Paper Co Ltd 新聞用紙の製造方法
JPH05331792A (ja) * 1992-06-02 1993-12-14 Mitsubishi Heavy Ind Ltd 紙の製造方法
JPH06280184A (ja) * 1993-03-26 1994-10-04 New Oji Paper Co Ltd 新聞用紙の製造方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3146159A (en) * 1960-08-01 1964-08-25 Combined Locks Paper Co Method of coating paper with high solids high viscosity coating in the wet end of the paper making machine
WO1985003316A1 (en) * 1984-01-19 1985-08-01 Svenska Träforskningsinstitutet Paper with improved surface properties and method of making the same
US4793899A (en) * 1987-07-23 1988-12-27 Beloit Corporation Coating press apparatus using short dwell coaters
US5152872A (en) * 1990-10-15 1992-10-06 Stone-Consolidated Inc. Apparatus for the wet end coating of paper

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000055423A1 (en) * 1999-03-12 2000-09-21 Metso Paper, Inc. Method and apparatus for handling a paper or board web
US6994771B1 (en) 1999-03-12 2006-02-07 Metso Paper, Inc. Method and apparatus for handling a paper or board web
EP1234912A2 (de) * 2001-02-13 2002-08-28 Mitsubishi Heavy Industries, Ltd. Auftragsvorrichtung und Verfahren zur Herstellung von beschichtetem Papier
EP1234912A3 (de) * 2001-02-13 2004-01-14 Mitsubishi Heavy Industries, Ltd. Auftragsvorrichtung und Verfahren zur Herstellung von beschichtetem Papier
CN105603802A (zh) * 2016-01-15 2016-05-25 烟台民士达特种纸业股份有限公司 一种高平滑绝缘用间位芳纶纸的制备方法

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JP3771673B2 (ja) 2006-04-26
EP0881329A3 (de) 1999-07-21
JPH10331093A (ja) 1998-12-15

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