WO2014174410A1 - A method for manufacturing a multiply web composite and a multiply web composite - Google Patents

A method for manufacturing a multiply web composite and a multiply web composite Download PDF

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Publication number
WO2014174410A1
WO2014174410A1 PCT/IB2014/060771 IB2014060771W WO2014174410A1 WO 2014174410 A1 WO2014174410 A1 WO 2014174410A1 IB 2014060771 W IB2014060771 W IB 2014060771W WO 2014174410 A1 WO2014174410 A1 WO 2014174410A1
Authority
WO
WIPO (PCT)
Prior art keywords
ply
multiply
multiply web
natural fibers
composite
Prior art date
Application number
PCT/IB2014/060771
Other languages
French (fr)
Inventor
Lars Axrup
Carl-Ola DANIELSSON
Olof Gabrielsson Seiler
Original Assignee
Stora Enso Oyj
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 Stora Enso Oyj filed Critical Stora Enso Oyj
Publication of WO2014174410A1 publication Critical patent/WO2014174410A1/en

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Classifications

    • 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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/30—Multi-ply
    • D21H27/32—Multi-ply with materials applied between the sheets
    • 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

Definitions

  • the present invention relates to a method for
  • the invention further relates to a multiply web
  • US 2012090800A discloses a web-type composite which is formed from fibres and plastic.
  • the composite is formed by wet web formation from a substantially homogeneous liquid mixture which contains natural fibres, plastic particles having a diameter of less than approximately 1000 ⁇ , and an agent that improves compatibility between natural fibres and plastic particles.
  • the web-type composite can be formed and dried by using a conventional paper machine.
  • a disadvantage with this procedure is that it can be difficult to retain the plastic particles in the web.
  • Yet another disadvantage is that the surface temperature on the drying cylinders, of the paper machine, has to be kept below the softening temperature of the plastic material to avoid the plastic particles to melt and stick on to the drying cylinders.
  • An object of the present invention is to provide a new web-type composite, which eliminates or alleviates at least some of the above mentioned disadvantages of prior art .
  • natural fibers comprises wood fibers, botanical fibers, and/or their derivate or their mixtures.
  • at least part of the natural fibers is lignin free and preferably hemicellulose free.
  • plastic particles are preferably a thermoplastic.
  • the plastic may be selected from any of the group of polyethylene (PE) , polypropylene (PP) , ethylene/propylene copolymer, polycarbonate (PC) , polystyrene (PS), polyethylene terephthalate (PET), polyactic acid (PLA) , polyhydroxybutylate,
  • ABS acrylonitrile/butadiene/styrene copolymer
  • SAN styrene/acrylonitrile copolymer
  • POM polyoxymethylene
  • biodegradable thermoplastics starch-based
  • thermoplastics their derivate and their mixtures.
  • any plastic suitable for the purpose may be used.
  • the plastic particles preferably have a diameter less than 1 mm, and more preferably less than 0.5 mm in order to improve the mixture effect with the natural fibers in the process.
  • liquid mixture is a mixture which comprises liquid, polymer particles and natural fibers.
  • the liquid mixture is transported to a forming section of a paper machine to form a web, wherein the web comprising a mixture of the natural fibers and the plastic
  • the mixture further comprises a "compatibilizing agent".
  • a "compatibilizing agent” is in this context an agent which works as an adhesion agent, i.e. an agent that increases adhesion between the plastic particles and the natural fibers and is compatible and/or reactive with reactive groups of plastic and natural fibers.
  • the compatibilizing agent comprises at least one reactive group which is compatible and/or reactive with reactive groups of cellulose which is a hydrophilic agent and of a polymer which is a hydrophobic agent.
  • the compatibilizing agent may be selected from the groups maleic anhydrides, maleic acid grafted polymers, polybutadienes , polymethyl ⁇ methacrylates (PMMA) , EVA, their derivate and their mixtures.
  • a “fiber suspension” is in this context a suspension which comprises natural fibers and liquid.
  • a “multiply web” is in this context a web contain several plies, at least three plies, where the multiply web is formed in a wet web condition.
  • a "multiply web composite” is in this context a multiply web, where the liquid has been removed from the multiply web .
  • the first fiber suspension forms a first o the liquid mixture forms a second ply, and o the second fiber suspension forms a third ply, wherein the second ply is arranged between the first ply and the third ply;
  • the multiply composite is characterized in that the composite is obtained by the above mentioned method.
  • Figure 1 shows a schematic illustration of an apparatus arrangement for manufacture a multiply composite.
  • Figure 2 shows an embodiment of a head box arrangement for forming a multiply web.
  • FIG. 3 shows a cross-section of the inventive multiply web composite.
  • the apparatus arrangement in Fig. 1 comprises a mixing tank 1 for mixing a liquid mixture 10.
  • the arrangement further comprises a conventional paper machine 6, 7, 8, 9 to form a multiply web and a multiply web composite of the liquid mixture 10, a first fibre suspension 11 and a second fibre suspension 12.
  • the mixing tank 1 comprises feeding means to add natural fibres 2, plastic particles 3 and liquid 4 to the mixing tank 1.
  • the tank 1 comprises mixing means (not shown in Fig. 1) for mixing the natural fibres 2, the plastic particles 3 and the liquid 4 to form the liquid mixture 10.
  • the liquid mixture 10 is then transported to a head box section 6 of the paper machine 6, 7, 8, 9.
  • a compatibilizing agent 5 is also added to the mixing tank 1 to be mixed together with the natural fibres 2, the plastic particles 3 and the liquid 4.
  • the compatibilizing agent 5 improves the adhesion between the natural fibres 2 and the plastic particles 3.
  • alternative embodiment comprises the natural fibers 2, the plastic particles 3, the liquid 4 and the
  • the paper machine 6, 7, 8, 9 comprising a forming section 6, 7 to form a multiply web 13 from the first fibre suspension 11, the second fibre suspension 12 and the liquid mixture 10.
  • the forming section 6, 7 comprises a head box section 6 and a wire section 7.
  • the paper machine 6, 7, 8, 9 further comprises a liquid removing section 8, 9 to remove liquid from the multiply web 13 to form a multiply web composite 14.
  • the liquid removing section 8, 9 comprises a pressing section 8 and a drying section 9.
  • the first fibre suspension 11 is transported to the head box section 6 to be uniformly distributed on the wire 7 to form an outer, first ply 15.
  • the liquid mixture 10 is also transported to the head box section 6 to be
  • Fig. 2 shows an arrangement of an head box section where three head boxes 6 are arranged in line, such that, the first fibre suspension 11 forms the first ply 15 onto the wire 7, the liquid mixture 10 forms the second ply 16 onto the first ply 15 and the second fibre suspension 12 forms the third ply 17 onto the second ply 16.
  • An alternative arrangement of the head box section 6 is to use a multilayer head box (not shown in figures, but are well known in the field of papermaking) .
  • the formed multiply web 13 is transported by the wire 7 to the pressing section 8.
  • the drying section 9 comprises at least one drying cylinder 9 onto which cylinder the pressed multiply web 13 is passing.
  • the drying cylinder 9 dries the pressed multiply web and forms the multiply web composite 14.
  • the multiply web composite 14 is then suitably wounded up to the form of a roll (not shown in figures) .
  • Fig. 3 shows a cross-section of the multiply web
  • the composite 14 comprises the outer, first ply 15 comprising natural fibres 2; the middle, second ply 16 comprising a mixture of natural fibres 2 and plastic particles 3; and the outer, third ply 17
  • the natural fibres 2 in the outer plies 15, 17 may contain lignin and hemicellulose or may be free from lignin and hemicellulose. Also the natural fibres in the middle, second ply 16 may contain lignin and hemicellulose or may be free from lignin and hemicellulose.
  • the surface temperature of the drying cylinders allows the surface temperature of the drying cylinders to be as high as 200°C.
  • Another advantage is the use of multiply structures in the final production of the composite products from the multiply web composite. Compression molding or
  • the multiply web composite may comprise one or more plies arranged between the two outer plies 15, 17 and the middle ply 16 in order to give the final product desired properties.

Abstract

The present invention relates to a method for manufacturing a multiply web composite. The method comprising the steps of mixing natural fibers (2), plastic particles (3) and liquid (4) to form a liquid mixture (10); transporting the liquid mixture to a forming section (6, 7) of a paper machine; transporting a first fiber suspension (11) to the forming section; transporting a second fiber suspension (12) to the forming section; forming a multiply web (13), wherein the first fiber suspension forms a first ply (15), the liquid mixture forms a second ply (16), and the second fiber suspension forms a third ply (17), wherein the second ply is arranged between the first ply and the third ply; and removing liquid from the multiply web to form the multiply web composite, such that, the first and third plies comprising natural fibers and the second ply comprising natural fibers and plastic particles.

Description

A METHOD FOR MANUFACTURING A MULTIPLY WEB COMPOSITE AND A
MULTIPLY WEB COMPOSITE
The present invention relates to a method for
manufacturing a multiply web composite.
The invention further relates to a multiply web
composite.
US 2012090800A discloses a web-type composite which is formed from fibres and plastic. The composite is formed by wet web formation from a substantially homogeneous liquid mixture which contains natural fibres, plastic particles having a diameter of less than approximately 1000 μπι, and an agent that improves compatibility between natural fibres and plastic particles. The web-type composite can be formed and dried by using a conventional paper machine.
A disadvantage with this procedure is that it can be difficult to retain the plastic particles in the web. Yet another disadvantage is that the surface temperature on the drying cylinders, of the paper machine, has to be kept below the softening temperature of the plastic material to avoid the plastic particles to melt and stick on to the drying cylinders.
An object of the present invention is to provide a new web-type composite, which eliminates or alleviates at least some of the above mentioned disadvantages of prior art .
In the following the description of the invention the term "natural fibers" will be used. In this context the term comprises wood fibers, botanical fibers, and/or their derivate or their mixtures. In a preferred embodiment of the invention at least part of the natural fibers is lignin free and preferably hemicellulose free.
The description further involves the term "plastic particles". In this context the plastic is preferably a thermoplastic. The plastic may be selected from any of the group of polyethylene (PE) , polypropylene (PP) , ethylene/propylene copolymer, polycarbonate (PC) , polystyrene (PS), polyethylene terephthalate (PET), polyactic acid (PLA) , polyhydroxybutylate,
acrylonitrile/butadiene/styrene copolymer (ABS),
styrene/acrylonitrile copolymer (SAN) , polyoxymethylene (POM) , biodegradable thermoplastics, starch-based
thermoplastics, their derivate and their mixtures.
Alternatively, any plastic suitable for the purpose may be used. The plastic particles preferably have a diameter less than 1 mm, and more preferably less than 0.5 mm in order to improve the mixture effect with the natural fibers in the process.
Moreover, the description comprises the term "liquid mixture". In this context the term is a mixture which comprises liquid, polymer particles and natural fibers. The liquid mixture is transported to a forming section of a paper machine to form a web, wherein the web comprising a mixture of the natural fibers and the plastic
particles. In an alternative embodiment of the invention the mixture further comprises a "compatibilizing agent". A "compatibilizing agent" is in this context an agent which works as an adhesion agent, i.e. an agent that increases adhesion between the plastic particles and the natural fibers and is compatible and/or reactive with reactive groups of plastic and natural fibers. The compatibilizing agent comprises at least one reactive group which is compatible and/or reactive with reactive groups of cellulose which is a hydrophilic agent and of a polymer which is a hydrophobic agent. The compatibilizing agent may be selected from the groups maleic anhydrides, maleic acid grafted polymers, polybutadienes , polymethyl¬ methacrylates (PMMA) , EVA, their derivate and their mixtures.
A "fiber suspension" is in this context a suspension which comprises natural fibers and liquid. A "multiply web" is in this context a web contain several plies, at least three plies, where the multiply web is formed in a wet web condition.
A "multiply web composite" is in this context a multiply web, where the liquid has been removed from the multiply web .
The inventive method is characterized in that the method comprising the steps of:
- mixing natural fibers, plastic particles and liquid to form a liquid mixture;
- transporting the liquid mixture to a forming section of a paper machine;
- transporting a first fiber suspension to the forming section;
- transporting a second fiber suspension to the forming section;
forming a multiply web, wherein:
o the first fiber suspension forms a first o the liquid mixture forms a second ply, and o the second fiber suspension forms a third ply, wherein the second ply is arranged between the first ply and the third ply; and
removing liquid from the multiply web to f the multiply web composite, such that, the first and third plies comprising natural fibers and the second ply comprising natural fibers and plastic particles. The multiply composite is characterized in that the composite is obtained by the above mentioned method.
In the following, the invention will be described further with reference to the drawings, wherein:
Figure 1 shows a schematic illustration of an apparatus arrangement for manufacture a multiply composite.
Figure 2 shows an embodiment of a head box arrangement for forming a multiply web.
Figure 3 shows a cross-section of the inventive multiply web composite. The apparatus arrangement in Fig. 1 comprises a mixing tank 1 for mixing a liquid mixture 10. The arrangement further comprises a conventional paper machine 6, 7, 8, 9 to form a multiply web and a multiply web composite of the liquid mixture 10, a first fibre suspension 11 and a second fibre suspension 12.
The mixing tank 1 comprises feeding means to add natural fibres 2, plastic particles 3 and liquid 4 to the mixing tank 1. The tank 1 comprises mixing means (not shown in Fig. 1) for mixing the natural fibres 2, the plastic particles 3 and the liquid 4 to form the liquid mixture 10. The liquid mixture 10 is then transported to a head box section 6 of the paper machine 6, 7, 8, 9. In an alternative embodiment, a compatibilizing agent 5 is also added to the mixing tank 1 to be mixed together with the natural fibres 2, the plastic particles 3 and the liquid 4. The compatibilizing agent 5 improves the adhesion between the natural fibres 2 and the plastic particles 3. Thus, the liquid mixture 10 of this
alternative embodiment comprises the natural fibers 2, the plastic particles 3, the liquid 4 and the
compatibilizing agent 5. However, tests have surprisingly shown that the need of a compatibilizing agent is not necessary for a good result to be achieved. The paper machine 6, 7, 8, 9 comprising a forming section 6, 7 to form a multiply web 13 from the first fibre suspension 11, the second fibre suspension 12 and the liquid mixture 10. The forming section 6, 7 comprises a head box section 6 and a wire section 7.
The paper machine 6, 7, 8, 9 further comprises a liquid removing section 8, 9 to remove liquid from the multiply web 13 to form a multiply web composite 14. The liquid removing section 8, 9 comprises a pressing section 8 and a drying section 9.
The first fibre suspension 11 is transported to the head box section 6 to be uniformly distributed on the wire 7 to form an outer, first ply 15. The liquid mixture 10 is also transported to the head box section 6 to be
uniformly distributed on the wire 7 to form a middle, second ply 16 over the first ply 15. And the second fibre suspension 12 is transported to the head box section 6 to be uniformly distributed on the wire 7 to form an outer, third ply 16 over the second ply 16. Thus, the second ply 16 is arranged between the first ply 15 and the third ply 17, where the three plies 15, 16, 17 form the multiply web 13. Fig. 2 shows an arrangement of an head box section where three head boxes 6 are arranged in line, such that, the first fibre suspension 11 forms the first ply 15 onto the wire 7, the liquid mixture 10 forms the second ply 16 onto the first ply 15 and the second fibre suspension 12 forms the third ply 17 onto the second ply 16. An alternative arrangement of the head box section 6 is to use a multilayer head box (not shown in figures, but are well known in the field of papermaking) .
The formed multiply web 13 is transported by the wire 7 to the pressing section 8. The pressing section 8
comprises at least one press 8, which presses liquid out of the multiply web 13. The pressed multiply web is then transported to the drying section 9. The drying section 9 comprises at least one drying cylinder 9 onto which cylinder the pressed multiply web 13 is passing. The drying cylinder 9 dries the pressed multiply web and forms the multiply web composite 14.
The multiply web composite 14 is then suitably wounded up to the form of a roll (not shown in figures) .
Fig. 3 shows a cross-section of the multiply web
composite 14. The composite 14 comprises the outer, first ply 15 comprising natural fibres 2; the middle, second ply 16 comprising a mixture of natural fibres 2 and plastic particles 3; and the outer, third ply 17
comprising natural fibres 2.
The natural fibres 2 in the outer plies 15, 17 may contain lignin and hemicellulose or may be free from lignin and hemicellulose. Also the natural fibres in the middle, second ply 16 may contain lignin and hemicellulose or may be free from lignin and hemicellulose.
By forming a multiply web composite which does not containing plastic particles in the outer plies 15, 17 it is possible to form a co-mingled sheet containing natural fibres and plastic particles at the same time as the mentioned drawbacks of prior art are avoided. Moreover, the retention of plastic particles is improved and higher temperatures can be used on the drying cylinders 9 and thus higher production speeds can be reached. The
invention allows the surface temperature of the drying cylinders to be as high as 200°C.
Another advantage is the use of multiply structures in the final production of the composite products from the multiply web composite. Compression molding or
hot-pressing are possible processes for producing a final composite product from the above mentioned multiply web composite. In these processes the web containing natural fibres and plastic particles are heated and pressed into a desired shape. One problem associated with using natural fibres in the process of prior art is associated with the need to clean the tools due to contaminants present in lignin and/or hemicellulose containing natural fibres. By using a multiply sheet with pure cellulose pulp as the natural fibres constituent in the layer which is in direct contact with the tool it is possible to reduce the problems associated with the need to clean the pressing tools. This greatly improves the economics and feasibility of this production method with lignin and/or hemicellulose containing fibres.
Another way to accomplish the same thing for the
compression molding process would be to stack layer of different co-mingled sheets on top of each other in the pressing tool prior to applying the heat and pressure. In this case the sheets that come in direct contact with the pressing tool should be essentially free from lignin and hemicellulose . In the foregoing, the invention has been described on the basis of some specific preferred embodiments. It is appreciated, however, that other embodiments and variants are possible within the scope of the following claims.
For instance, even if the described embodiments only mention a multiply web composite comprising three plies, i.e. two outer plies and a middle ply, it is obvious that the multiply web composite may comprise one or more plies arranged between the two outer plies 15, 17 and the middle ply 16 in order to give the final product desired properties.
Moreover, a person skilled in the art realizes that other variants of the head box section also are possible to achieve a multiply web on a wire.

Claims

C L A I M S
Method for manufacturing a multiply web composite (14), characterized in that the method comprising the steps of:
- mixing natural fibers (2), plastic particles (3) and liquid (4) to form a liquid mixture (10) ,
- transporting the liquid mixture (10) to a
forming section (6, 7) of a paper machine,
- transporting a first fiber suspension (11) to the forming section (6, 7),
- transporting a second fiber suspension (12) to the forming section,
forming a multiply web (13), wherein:
o the first fiber suspension forms a first ply (15),
o the liquid mixture (10) forms a second ply (16), and
o the second fiber suspension (12) forms a third ply (17), wherein the second ply (16) is arranged between the first ply (15) and the third ply (17), and
- removing liquid from the multiply web (13) to form the multiply web composite (14), such that, the first and third plies (15, 17) comprising natural fibers (2) and the second ply (16) comprising natural fibers
(2) and plastic particles (3) .
Method according to claim 1, characterized in that the step of forming the multiply web comprising the step of distributing the first fiber suspension, the liquid mixture and the second fiber suspension on a wire ( 7 ) .
3. Method according to any of claims 1-2,
characterized in that the step of removing liquid comprising the steps of pressing and drying the multiply web (13) .
4. Method according to any of claims 1-3,
characterized in that the mixing step also
comprising mixing of a compatibilizing agent to form the liquid mixture, wherein the
compatibilizing agent improves the compatibility between the natural fibers and plastic particles.
5. Method according to any of claims 1-4,
characterized in that at least part of the natural fibers in the first ply (15) and third ply (17) are free from lignin.
6. Method according to any of claims 1-5,
characterized in that at least part of the natural fibers in the first ply (15) and third ply (17) are free from hemicellulose .
7. Method according to any of claims 1-6,
characterized in that at least part of the natural fibers in the second ply (16) are free from lignin.
8. Method according to any of claims 1-7,
characterized in that at least part of the natural fibers in the second ply (16) are free from
hemicellulose.
9. Method according to any claims 1-8, characterized in that the plastic particles having a diameter of less than 1 mm, preferably less than 0.5 mm.
10. A multiply web composite, characterized in that the multiply web composite (14) is obtained by the method in accordance with any of the claims 1-9.
PCT/IB2014/060771 2013-04-22 2014-04-16 A method for manufacturing a multiply web composite and a multiply web composite WO2014174410A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201361814630P 2013-04-22 2013-04-22
US61/814,630 2013-04-22

Publications (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017006241A1 (en) 2015-07-06 2017-01-12 Stora Enso Oyj Forming and dewatering of a composite using a double wire press
EP3567149A3 (en) * 2018-01-30 2020-01-22 Seiko Epson Corporation Sheet manufacturing apparatus and sheet manufacturing method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4619734A (en) * 1983-10-21 1986-10-28 Kmw Aktiebolag Sanitary paper web having high bulk, bulk softness and surface softness and method of manufacturing said web
US5989682A (en) * 1997-04-25 1999-11-23 Kimberly-Clark Worldwide, Inc. Scrim-like paper wiping product and method for making the same
US6592983B1 (en) * 1999-06-18 2003-07-15 The Procter & Gamble Company Absorbent sheet material having cut-resistant particles and methods for making the same
US20030192663A1 (en) * 2002-04-10 2003-10-16 Tyrone Cornbower High temperature paper
US20120090800A1 (en) * 2009-04-20 2012-04-19 Elastopoli Oy Composite intermediate, method for forming same, and use of the composite intermediate
WO2014080084A1 (en) * 2012-11-22 2014-05-30 Teknologian Tutkimuskeskus Vtt Moldable fibrous product and method of producing the same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4619734A (en) * 1983-10-21 1986-10-28 Kmw Aktiebolag Sanitary paper web having high bulk, bulk softness and surface softness and method of manufacturing said web
US5989682A (en) * 1997-04-25 1999-11-23 Kimberly-Clark Worldwide, Inc. Scrim-like paper wiping product and method for making the same
US6592983B1 (en) * 1999-06-18 2003-07-15 The Procter & Gamble Company Absorbent sheet material having cut-resistant particles and methods for making the same
US20030192663A1 (en) * 2002-04-10 2003-10-16 Tyrone Cornbower High temperature paper
US20120090800A1 (en) * 2009-04-20 2012-04-19 Elastopoli Oy Composite intermediate, method for forming same, and use of the composite intermediate
WO2014080084A1 (en) * 2012-11-22 2014-05-30 Teknologian Tutkimuskeskus Vtt Moldable fibrous product and method of producing the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017006241A1 (en) 2015-07-06 2017-01-12 Stora Enso Oyj Forming and dewatering of a composite using a double wire press
EP3567149A3 (en) * 2018-01-30 2020-01-22 Seiko Epson Corporation Sheet manufacturing apparatus and sheet manufacturing method
TWI720414B (en) * 2018-01-30 2021-03-01 日商精工愛普生股份有限公司 Sheet manufacturing device and sheet manufacturing method

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