WO2020022013A1 - Paper sheet and method for manufacturing paper sheet - Google Patents

Paper sheet and method for manufacturing paper sheet Download PDF

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Publication number
WO2020022013A1
WO2020022013A1 PCT/JP2019/026490 JP2019026490W WO2020022013A1 WO 2020022013 A1 WO2020022013 A1 WO 2020022013A1 JP 2019026490 W JP2019026490 W JP 2019026490W WO 2020022013 A1 WO2020022013 A1 WO 2020022013A1
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WO
WIPO (PCT)
Prior art keywords
sheet
gear
paper
product
paper sheet
Prior art date
Application number
PCT/JP2019/026490
Other languages
French (fr)
Japanese (ja)
Inventor
清水　隆男
Original Assignee
信越ポリマー株式会社
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 信越ポリマー株式会社 filed Critical 信越ポリマー株式会社
Publication of WO2020022013A1 publication Critical patent/WO2020022013A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20—Corrugating; Corrugating combined with laminating to other layers
    • B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
    • B31F1/26—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
    • B31F1/28—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/08—Corrugated paper or cardboard
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds
    • D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
    • 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
    • D21H27/40—Multi-ply at least one of the sheets being non-planar, e.g. crêped
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/36—Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields

Definitions

  • the present invention relates to a paper sheet and a method for manufacturing the paper sheet.
  • the circuit board itself is made of a material with excellent heat dissipation, and a single heat sink or a means for driving a cooling fan is used singly or in combination. Is being done.
  • the method of forming the circuit board itself from a material having excellent heat dissipation properties such as diamond, aluminum nitride, cubic boron nitride, etc., significantly increases the cost of the circuit board.
  • the arrangement of the cooling fan causes a problem that a rotating device called a fan malfunctions, necessity of maintenance for preventing the malfunction, and difficulty in securing an installation space arise.
  • the radiation fin has a large surface area by forming a large number of columnar or flat protruding portions using a metal (for example, aluminum) having a high thermal conductivity, so that heat radiation can be further improved. It is widely used as a heat dissipating component because it is a simple member (see Patent Document 1).
  • an electromagnetic wave generated from an electronic component mounted on an electronic device has a serious problem of electromagnetic wave interference affecting other products and the human body.
  • development of an electromagnetic wave shielding material or an antistatic material has been an issue.
  • an electromagnetic wave shielding material for example, an electromagnetic wave shielding film having a protective layer made of an insulating material and a metal layer laminated on one or both surfaces of the protective layer has been developed (see Patent Document 2).
  • a method using a resin plate having a property can be considered.
  • a resin plate having a property there is a problem that such a resin plate is hard, easily damaged, has low adhesion to the above-described product, and is heavy.
  • the present invention has been made to solve the above-mentioned problems, and is a paper which is lightweight, soft, and excellent in anti-scratch property, capable of heat radiation of a product, antistatic of a product, and shielding electromagnetic waves from or to a product. It is an object to provide a sheet and a method for manufacturing the sheet.
  • a paper sheet according to an embodiment for achieving the above object is a paper sheet capable of releasing heat from a product, preventing the product from being charged, and shielding electromagnetic waves from the product or electromagnetic waves from the outside to the product.
  • the paper sheet according to another embodiment preferably includes a third sheet fixed to a surface of the second sheet opposite to the first sheet.
  • the third sheet is a sheet containing a carbon-based filler.
  • the space has a shape that is long in one direction, and has a form of a cylinder open at both ends or a cup open at one end.
  • the sheet containing the carbon-based filler contains the carbon-based filler in an amount of 30% by mass or more based on the sheet.
  • the method of manufacturing a paper sheet according to one embodiment includes a rotatable first gear, a second gear that meshes with the first gear and rotates, and a contact position between the first gear and the second gear.
  • An apparatus comprising: an adhesive application unit located further downstream in the rotation direction of the second gear; and a sheet feeder located downstream in the rotation direction of the second gear from the adhesive application unit.
  • the method for manufacturing a paper sheet according to one embodiment includes a rotatable first gear, a second gear that meshes with the first gear and rotates, and a contact position between the first gear and the second gear.
  • An apparatus comprising: an adhesive application unit located further downstream in the rotation direction of the second gear; and a sheet feeder located downstream in the rotation direction of the second gear from the adhesive application unit.
  • Application step of applying adhesive , On one side of the first sheet sent from the sheet feeding unit includes a contact step of contacting the second sheet molded the Pureshito.
  • the paper sheet manufacturing method is preferably a manufacturing step of pulping wood pieces and / or waste paper to manufacture wood pulp, and mixing a carbon-based filler and the wood pulp. Including a mixing step of manufacturing mixed pulp and a papermaking step of papermaking the mixed pulp prior to the inserting step, wherein at least one of the first sheet and the presheet is manufactured by papermaking the mixed pulp. Sheet.
  • the present invention is soft, has excellent scratch resistance, has excellent adhesion to a product to be radiated or prevented from being charged, and can be reduced in weight.
  • FIG. 1A is a perspective view of a part of the paper sheet according to the first embodiment.
  • FIG. 1B is a perspective view showing a state in which the paper sheet according to the first embodiment is compressed in the thickness direction.
  • FIG. 2 is a schematic flowchart of a part of the method for manufacturing a paper sheet according to the first embodiment.
  • FIG. 3 is a schematic flowchart of a part of the method for manufacturing a paper sheet according to the first embodiment.
  • FIG. 4 shows an example of an apparatus used in the manufacturing method of FIG.
  • FIG. 5 is a perspective view of a part of the paper sheet according to the second embodiment.
  • FIG. 6 is a schematic flowchart of a part of the method for manufacturing a paper sheet according to the second embodiment.
  • FIG. 7 shows an example of an apparatus used in the manufacturing method of FIG.
  • FIG. 1A is a perspective view of a part of the paper sheet according to the first embodiment.
  • Paper sheet 1 is a paper sheet that can release heat from a product, prevent the product from being charged, and / or shield electromagnetic waves from the product or electromagnetic waves from the outside to the product in a broad sense.
  • the paper sheet 1 includes a first sheet 2 and a second sheet 3 that is fixed to one surface of the first sheet 2 and that has a shape that repeats continuous irregularities in a predetermined direction. At least one of the first sheet 2 and the second sheet 3 is a sheet containing a carbon-based filler.
  • the second sheet 3 is provided so that a space 4 is formed between the first sheet 2 and the unevenness.
  • the first sheet 2 is preferably a flat plate. However, the first sheet 2 may be a wave-shaped plate that repeats peaks and valleys in one direction.
  • the second sheet 3 is a bellows-like sheet in which linear concave and convex portions are repeated in a wave shape rightward on the paper surface of FIG. 1A.
  • the second sheet 3 may have a shape in which continuous irregularities are repeated in a plurality of directions.
  • the spaces 4 are present by the number of the convex portions of the irregularities of the second sheet 3.
  • the space 4 may not be formed by the number of protrusions of the second sheet 3, but may be formed by connecting two or more of the protrusions to be smaller than the number of protrusions.
  • the space 4 has a shape that is long in one direction (a direction extending in the depth of the paper of FIG. 1A), and has a shape of an open-ended cylinder.
  • the space 4 may have a form of a so-called one-end open cup in which only the front surface of the paper surface of FIG. 1A is opened and the end surface in the depth direction of the paper surface is closed. Further, the space 4 may have a form in which both ends in the length direction are closed.
  • the second sheet 3 is connected to the first sheet 2 at the opening end of the projection (including the bottom of the recess).
  • the connection method may be any method such as adhesion, fitting, fusion and the like.
  • an adhesive having excellent heat resistance.
  • the adhesive preferably has excellent thermal conductivity, but may have low thermal conductivity.
  • the first sheet 2 and the second sheet 3 are formed of a sheet of paper (hereinafter, referred to as “board”).
  • the type of paperboard is not particularly limited, and may be, for example, a single- or multi-layer paperboard made from waste paper pulp or kraft pulp. It should be noted that the first sheet 2 and the second sheet 3 may or may not be made of the same material. Further, at least one of the first sheet 2 and the second sheet 3 is preferably a sheet containing a carbon-based filler.
  • “carbon” includes any structure of carbon (element symbol: C) such as graphite, carbon black having lower crystallinity than graphite, expanded graphite, diamond, and diamond-like carbon having a structure similar to diamond. Is interpreted in a broad sense.
  • the first sheet 2 and the second sheet 3 are sheets containing a carbon-based filler, and specifically, are a paperboard made of a mixed pulp obtained by mixing wood pulp with graphite.
  • the sheets 2 and 3 preferably contain the carbon-based filler in an amount of 30% by mass or more, and the carbon-based filler in an amount of 50% by mass or more. More preferably, it is contained. It does not matter whether the content of the carbon-based filler in the first sheet 2 and the second sheet 3 is the same.
  • the first sheet 2 and the second sheet 3 are sheets excellent in conductivity and electromagnetic wave shielding properties because they contain a carbon-based filler. Further, the first sheet 2 and the second sheet 3 have excellent thermal conductivity.
  • the thermal conductivity of the first sheet 2 or the second sheet 3 is preferably 5 W / mK or more, and more preferably 10 W / mK or more, when exhibiting isotropic thermal conductivity. Further, the first sheet 2 or the second sheet 3 may have different thermal conductivity in the plane direction and the thickness direction.
  • the thermal conductivity in the plane direction is 100 W / mK and the thickness direction is 100 W / mK.
  • the second sheet 3 is preferably a sheet that easily bends (or bends), and the thickness thereof is not limited, but is preferably 0.05 to 5 mm, more preferably 0.065 to 0.5 mm.
  • the paper sheet 1 receives a compressive force in the thickness direction from the second sheet 3 to the first sheet 2 such that the surface of the product comes into contact with the second sheet 3, for example, the state shown in FIG. 1B is obtained. That is, the uneven structure of the second sheet 3 collapses, and the space 4 is collapsed.
  • the second sheet 3 has a shape that repeats irregularities, and can be deformed such that the convex portion falls down to the adjacent concave portion side.
  • the paper sheet 1 is also effective for shielding electromagnetic waves generated from products.
  • the space 4 has a role of facilitating the contact of the product with the first sheet 2 and the second sheet 3 even if the surface of the product has irregularities.
  • the paper sheet 1 is formed so that the product and the paper sheet 1 are subjected to a compressive force in the thickness direction from the first sheet 2 to the second sheet 3 such that the surface of the product abuts on the first sheet 2. May be arranged. Also in this case, the concavo-convex structure of the second sheet 3 collapses, and the space 4 is collapsed. Thereby, the thermal conductivity between the first sheet 2 and the second sheet 3 becomes higher. Further, the conductivity between the first sheet 2 and the second sheet 3 is further increased.
  • FIGS. 2 and 3 are schematic flowcharts showing a part of the method for manufacturing a paper sheet according to the first embodiment.
  • the method for manufacturing a paper sheet according to the first embodiment includes a manufacturing step of a wood pulp (an example of a manufacturing step; S100), a manufacturing step of a mixed pulp (an example of a mixing step; S110), and a papermaking step (S120) in this order.
  • the process is performed to manufacture a pre-sheet 3a before the first sheet 2 and the second sheet 3 are formed.
  • a pre-sheet insertion step an example of an insertion step; S200
  • a pre-sheet molding step an example of a molding step; S210
  • an adhesive application step Example of application step; S220
  • the steps of contacting the first sheet 2 and the second sheet 3 are performed in this order, and the paper sheet 1 is manufactured.
  • Wood pulp manufacturing step is a step of pulping wood pieces and / or waste paper to produce wood pulp. More specifically, in the case of pulping wood pieces, wood pieces (chips) are added with a chemical in a digester, boiled to take out wood fibers, and the wood fibers are washed and bleached to produce wood pulp. pulp). The wood pulp may be produced by grinding wood pieces with a refiner, and then removing the dust with a screen and bleaching the resulting wood fibers (mechanical pulp). In the case of pulping waste paper, wood pulp is produced by throwing waste paper into a pulp and loosening it in a pruritic manner to remove foreign substances such as dirt and dust and chemicals such as a surfactant. The wood pulp manufactured in this manufacturing step (S100) may be wood pulp manufactured only from wood pieces or waste paper, or pulp manufactured from wood pieces and pulp manufactured from waste paper. Wood pulp may be mixed.
  • the production step is a step of producing a mixed pulp by mixing a carbon-based filler and wood pulp. More specifically, the mixed pulp is manufactured by mixing a carbon-based filler with a pulp slurry, which is a suspension in which wood pulp is dispersed in a solvent such as water.
  • the amount of the carbon-based filler mixed into the pulp slurry is preferably such that the mass of the carbon-based filler is at least 30% by mass, more preferably at least 50% by mass, based on the total mass of the mixed pulp and the carbon-based filler. preferable.
  • the mass of the carbon-based filler is 30 to 80% by mass, or 50 to 80% by mass or less based on the total mass. Is preferred.
  • the paper making step is a step of making mixed pulp. More specifically, paper is produced by blowing the mixed pulp onto a wire to produce a sheet, dewatering and drying. Thereafter, the surface of the paper is smoothed and taken up by a reel, and cut into a predetermined size.
  • FIG. 4 shows an example of an apparatus used in the manufacturing method of FIG.
  • the apparatus 30 includes a first rotatable gear 31, a second gear 32 that rotates while meshing with the first gear 31, and a second gear 32 from a contact position 36 between the first gear 31 and the second gear 32.
  • An adhesive application section 33 is located downstream of the gear 32 in the rotation direction
  • a sheet feed section 34 is located downstream of the adhesive application section 33 in the rotation direction of the second gear 32.
  • downstream means a rotation direction of the second gear 32 at the contact position 36 and a downstream side in a direction in which the pre-sheet 3a is fed. The same applies to the subsequent “downstream”.
  • the sheet feeding unit 34 is a unit that conveys the first sheet 2 along the surface thereof.
  • the sheet feeding unit 34 is, for example, a belt conveyance unit having a belt for driving the first sheet 2 in the direction of the dotted arrow, or the first sheet 2 is rotated by the rotation of the second gear 32 without any driving means.
  • a non-driving transport unit that moves in the direction of the arrow may be used.
  • the sheet feeding unit 34 may be a unit that conveys the first sheet 2 by a roller.
  • the insertion step is a step of inserting the pre-sheet 3a before forming the second sheet 3 into the contact position 36 from the side opposite to the adhesive application section 33 with respect to the contact position 36 (inserted in the direction of arrow A).
  • the first gear 31 is rotated by driving means such as a motor (rotated in the direction of the solid arrow in the first gear 31).
  • the second gear 32 meshes with the first gear 31 and is driven by the first gear 31 (driven by the direction of the solid arrow in the second gear 32).
  • Pre-sheet forming step is a step of feeding the pre-sheet 3a in the traveling direction of the second gear 32 while forming the pre-sheet 3a into the tooth shape of the second gear 32. More specifically, the pre-sheet 3 a is formed by being sandwiched between the first gear 31 and the second gear 32, and heads toward the adhesive application section 33 while attaching to the surface of the second gear 32. The pre-sheet 3a is formed so as to transfer the tooth profile of the second gear 32 at the contact position 36 before the adhesive application section 33. As a result, the pre-sheet 3a is formed into the second sheet 3.
  • the application step is a step in which the tooth-shaped part of the second sheet 3 is brought into contact with the adhesive application part 33 to apply the adhesive to the molded part of the second sheet 3.
  • the adhesive application section 33 preferably has the shape of a roller, and rotates by driving means such as a motor, or is driven by another rotating member such as the second gear 32 (in the adhesive application section 33). It rotates in the direction of the solid arrow).
  • the adhesive application section 33 preferably includes an adhesive holding section 35 having an adhesive held on its surface.
  • the gap 37 between the second gear 32 and the adhesive application section 33 has a width that allows the formed second sheet 3 to pass with the adhesive applied.
  • the adhesive application section 33 is not limited to a member having the shape of a roller, and may be, for example, a flat plate holding the adhesive, a container storing the adhesive, or a brush holding the adhesive.
  • the step of contacting the first sheet with the second sheet is performed by bonding the first sheet 2 (conveyed in the direction of arrow B) sent from the sheet feeding section 34 to the adhesive of the second sheet 3 formed with the pre-sheet 3a. This is a step of contacting a portion to which is applied. “Contact” may be read as bonding or bonding. The same applies to the subsequent “contact”.
  • the first sheet 2 is conveyed along the front surface 38 of the sheet feeding unit 34 (conveyed in the direction of the dotted arrow near the front surface 38).
  • the sheet feeding section 34 is arranged with a gap 39 between the front surface 38 and the second gear 32.
  • the front surface 38 is a surface on which the first sheet 2 can be smoothly conveyed.
  • the gap 39 is formed to have a width that allows the second sheet 3 to pass through with the first sheet 2 adhered to the second sheet 3. Thereby, the paper sheet 1 is completed.
  • the adhesive application section 33 may be arranged near the sheet feeding section 34.
  • the adhesive is applied to one surface of the first sheet 2.
  • the adhesive application step (S220) is a step in which one side of the first sheet 2 is brought into contact with the adhesive application section 33 to apply the adhesive.
  • the pre-sheet is formed on one side of the first sheet 2 sent from the sheet feeding unit 34 (that is, the side to which the adhesive is applied). This is the step of bringing the second sheet 3 into contact.
  • FIG. 5 shows a perspective view of a part of the paper sheet according to the second embodiment.
  • the paper sheet 81 according to the second embodiment differs from the paper sheet 1 according to the first embodiment in that the paper sheet 81 according to the second embodiment includes a third sheet 8 fixed to the surface of the second sheet 3 opposite to the first sheet 2. , Other than them are common.
  • the third sheet 8 is a sheet made of paperboard, like the first sheet 2 and / or the second sheet 3.
  • the third sheet 8 is preferably a sheet containing a carbon-based filler.
  • the third sheet 8 is a paperboard made of a mixed pulp obtained by mixing wood pulp with graphite.
  • the third sheet 8 preferably contains 30% by mass or more of the carbon-based filler, and preferably contains 50% by mass or more of the carbon-based filler. More preferred.
  • the paper sheet 81 when the paper sheet 81 receives a compressive force in the thickness direction from the third sheet 8 to the first sheet 2, the uneven structure of the second sheet 3 collapses, and the space 4 is collapsed.
  • the second sheet 3 has a shape that repeats irregularities, and can be deformed such that the convex portion falls down to the adjacent concave portion side.
  • the first sheet 2 and the third sheet 8 are in contact only at the opening end of the second sheet 3, respectively.
  • the first sheet 2 and the third sheet 8 come into contact with portions other than the open end of the second sheet 3.
  • the thermal conductivity and the electrical conductivity between the third sheet 8 and the second sheet 3 are higher, and the thermal conductivity and the electrical conductivity between the first sheet 2 and the second sheet 3 are higher.
  • the paper sheet 81 is effective not only for preventing the product from being charged, but also for shielding electromagnetic waves generated from the product.
  • the paper sheet 81 is formed so that the product and the paper sheet 1 are subjected to a compressive force in the thickness direction from the first sheet 2 to the third sheet 8 such that the surface of the product abuts on the first sheet 2. May be arranged.
  • FIG. 6 is a schematic flowchart of a method for manufacturing a heat dissipation structure according to the second embodiment.
  • FIG. 7 shows an example of an apparatus used in the manufacturing method of FIG.
  • the method for manufacturing the paper sheet 81 according to the second embodiment includes a pre-sheet insertion step (S200), a pre-sheet molding step (S210), an adhesive application step (S220), and a step of forming the first sheet 2 and the second sheet 3 together.
  • This is a method in which the steps are performed in the order of a contact step (S230), a step of applying an adhesive to the pre-paper sheet 1a (S240), and a step of contacting the pre-paper sheet 1a with the third sheet 8 (S250).
  • the apparatus 80 used in the manufacturing method includes, in addition to the components of the apparatus 30 shown in FIG. 4, an adhesive agent in the downstream direction of the pre-paper sheet 1 a conveyed from between the sheet feeding unit 34 and the second gear 32.
  • the device includes an application unit 33 and a spring plate 83 facing the adhesive application unit 33.
  • the device 80 is disposed downstream of the pre-sheet sheet 1a conveyed from between the adhesive application section 33 and the spring plate 83, and faces the paper sheet feeding section 84 with the paper sheet feeding section 84 separated by a gap. And a heating plate 86.
  • the apparatus 80 includes a third sheet feeder 88 in the downstream direction of the pre-paper sheet 1a conveyed from between the sheet feeder 34 and the second gear 32.
  • the paper sheet feeding unit 84 is a unit that conveys the pre-paper sheet 1a having the surface on the second sheet 3 side to which the adhesive is applied, while applying pressure.
  • the paper sheet feeder 84 may be, for example, a belt transporter having a belt that drives the pre-paper sheet 1a in the direction of the dotted arrow. Further, the paper sheet feeding section 84 may be a unit that transports the pre-paper sheet 1a by a roller.
  • the hot platen 86 is a member in which high-temperature steam is supplied and kept at a high temperature.
  • the third sheet feeder 88 is means for conveying the third sheet 8 to the paper sheet feeder 84.
  • the third sheet feeder 88 preferably has the shape of a roller, and is rotated by driving means such as a motor or driven by another rotating member such as a gear (solid line in the third sheet feeder 88). Rotation in the direction of the arrow).
  • driving means such as a motor or driven by another rotating member such as a gear (solid line in the third sheet feeder 88). Rotation in the direction of the arrow).
  • the surface of the pre-paper sheet 1a on the second sheet 3 side is brought into contact with the adhesive application section 33, and the adhesive is applied to the surface on the second sheet 3 side. It is a step to do.
  • the configuration of the adhesive application section 33 is the same as that of the first embodiment, and a description thereof will be omitted.
  • the device 80 includes a spring plate 83 facing the adhesive application section 33. The spring plate 83 presses the pre-paper sheet 1a conveyed to the adhesive application section 33 from above. The pre-paper sheet 1a can reliably apply the adhesive to the surface on the second sheet 3 side by contacting the adhesive application section 33 while being pressed by the spring plate 83.
  • the method of applying the adhesive adopts a method of applying using a flat plate holding the adhesive, a container storing the adhesive, or a brush holding the adhesive, instead of the member having the shape of the roller. Is also good.
  • an adhesive is applied to one surface of the third sheet 8 (conveyed in the direction of arrow C) sent from the third sheet feeding section 88.
  • This is a step of contacting the surface of the prepreg sheet 1a on the second sheet 3 side.
  • the pre-paper sheet 1a and the third sheet 8 to which the adhesive has been applied are bonded to each other by being heated while being pressed by the paper sheet feeding section 84 and the hot platen 86. Thereby, the paper sheet 81 according to the second embodiment is completed.
  • a step of applying an adhesive to the third sheet 8 may be performed instead of the step of applying an adhesive to the pre-paper sheet 1a (S240).
  • a step of applying an adhesive to the third sheet 8 may be performed in the contacting step (S250) between the pre-paper sheet 1a and the third sheet 8, the surface of the pre-paper sheet 1a on the second sheet 3 side is brought into contact with one side of the third sheet 8 to which the adhesive is applied. Become a step.
  • the paper sheets 1 and 81 are paper sheets that can release heat from the product and prevent the product from being charged.
  • a second sheet 3 having a shape that repeats continuous irregularities toward.
  • At least one of the first sheet 2 and the second sheet 3 is a sheet containing a carbon-based filler.
  • the second sheet 3 is provided so that a space 4 is formed between the first sheet 2 and the unevenness.
  • the second sheet 3 occupies the space 4. Since the first sheet 2 is brought into contact with the first sheet 2 in the form of being laid down or the space 4 being crushed, it is difficult to depend on the unevenness of the surface of the product, and high heat radiation efficiency can be obtained. Further, the conductivity between the first sheet 2 and the second sheet 3 also increases. Therefore, the paper sheets 1 and 81 are soft, have excellent scratch resistance, and have high adhesion to a product to be radiated or prevented from being charged. Further, the paper sheets 1 and 81 are also effective for preventing static electricity of the product and shielding electromagnetic waves generated from the product. Further, the weight of the paper sheets 1 and 81 can be reduced as compared with a conventional metal radiation fin or the like.
  • the paper sheets 1 and 81 have high heat radiation and electromagnetic wave shielding properties, they are preferably used for products that require heat radiation, antistatic, and electromagnetic wave shielding to the outside, but are not limited thereto.
  • the paper sheets 1 and 81 may be used for products that do not need antistatic properties or electromagnetic wave shielding properties for the outside and only require heat radiation. Further, the paper sheets 1 and 81 may be used for products that do not require heat radiation and require the above-described antistatic property and electromagnetic wave shielding property.
  • the paper sheet 81 is provided with the third sheet 8 fixed to the surface of the second sheet 3 on the side opposite to the first sheet 2, so that the paper sheet 81 is less dependent on the unevenness of the surface of the product, and has a heat radiation or antistatic property. Adhesion to the target product increases. Further, the paper sheet 81 can exhibit high heat dissipation, antistatic properties, and electromagnetic shielding properties against the outside.
  • the third sheet 8 is a sheet containing a carbon-based filler, the thermal conductivity and the electrical conductivity between the third sheet 8 and the second sheet 3 are further increased.
  • the space 4 has a shape that is long in one direction and has a form of an open-ended cylinder or an open-ended cup, the deformability of the space 4 is enhanced, and the space 4 is further dependent on unevenness on the surface of the product. And the thermal and electrical conductivity is higher. Further, the paper sheets 1 and 81 become lighter due to the space 4.
  • the first sheet 2 and the second sheet 3 are both sheets containing a carbon-based filler.
  • the present invention is not limited to this, and one of the first sheet 2 and the second sheet 3 may be used.
  • a sheet containing a carbon-based filler may be used.
  • the method for producing the sheet containing no carbon-based filler is the same as the method for producing the sheet shown in FIG. 2 except that the step of producing the mixed pulp (S110; see FIG. 2) is omitted.
  • the sheet containing no carbon-based filler is manufactured in a papermaking step (S120) using a pulp slurry in which the wood pulp manufactured in the wood pulp manufacturing step (S100) is dispersed in a solvent.
  • the surface of the product may It is preferable to arrange the product and the paper sheet 1 so as to receive a compressive force in the thickness direction from the second sheet 3 to the first sheet 2 by, for example, contacting the two sheets 3.
  • the paper sheet 1 can exhibit higher heat dissipation.
  • the surface of the product may be in contact with any one of the first sheet 2 and the second sheet 3 from the viewpoint of antistatic and electromagnetic wave shielding.
  • the paper sheet 1 of the first embodiment is a sheet in which the first sheet 2 is a sheet containing a carbon-based filler and the second sheet 3 is a sheet not containing a carbon-based filler
  • the product and the paper sheet 1 receive a compressive force in the thickness direction from the first sheet 2 to the second sheet 3 by, for example, contacting the first sheet 2.
  • the paper sheet 1 can exhibit higher heat dissipation.
  • the surface of the product may be in contact with any one of the first sheet 2 and the second sheet 3 from the viewpoint of antistatic and electromagnetic wave shielding.
  • the third sheet 8 is a sheet containing a carbon-based filler, but is not limited thereto, and may be a sheet containing no carbon-based filler.
  • the surface of the product abuts on the first sheet 2 and the like, so that the first sheet 2 and the third sheet 2
  • the paper sheet 81 can exhibit higher heat dissipation.
  • the surface of the product may be in contact with any one of the first sheet 2 and the third sheet 8.
  • the first sheet 2 is a sheet containing a carbon-based filler
  • the second sheet 3 and the third sheet 8 are sheets containing no carbon-based filler. May be.
  • the product and the paper sheet 81 are arranged such that the surface of the product comes into contact with the first sheet 2 and receives a compressive force in the thickness direction from the first sheet 2 to the third sheet 8. Is preferred.
  • the paper sheet 81 can exhibit higher heat dissipation.
  • the surface of the product may be in contact with any one of the first sheet 2 and the third sheet 8.
  • the second sheet 3 is a sheet containing a carbon-based filler
  • the first sheet 2 and the third sheet 8 are sheets containing no carbon-based filler. May be.
  • the paper sheet 81 of the second embodiment is configured such that the second sheet 3 and the third sheet 8 are sheets containing a carbon-based filler, and the first sheet 2 is a sheet containing no carbon-based filler. May be.
  • the product and the paper sheet 81 are arranged such that the surface of the product comes into contact with the third sheet 8 and receives a compressive force in the thickness direction from the third sheet 8 to the first sheet 2. Is preferred.
  • the paper sheet 81 can exhibit higher heat dissipation.
  • the surface of the product may be in contact with any one of the first sheet 2 and the third sheet 8.
  • the first sheet 2 and the third sheet 8 are sheets containing a carbon-based filler
  • the second sheet 3 is a sheet containing no carbon-based filler. May be. In this case, even if the surface of the product is in contact with any one of the first sheet 2 and the third sheet 8, it is possible to obtain high heat dissipation, antistatic properties, and electromagnetic wave shielding properties.
  • the paper sheet may be configured by stacking two paper sheets 1 of the first embodiment in the thickness direction. That is, the paper sheet is configured by stacking the first sheet 2, the second sheet 3, the first sheet 2, and the second sheet 3 in this order in the thickness direction. Further, the paper sheet may be configured by stacking three or more paper sheets 1 of the first embodiment in the thickness direction. Further, the paper sheet may be configured by stacking the paper sheet 1 of the first embodiment and the paper sheet 81 of the second embodiment. In this case, the paper sheet is configured by bringing the second sheet 3 of the paper sheet 1 into contact with the first sheet 2 or the third sheet 8 of the paper sheet 81. With such a configuration, the thickness of the paper sheet can be freely designed according to the purpose of use.
  • the paper sheet 81 according to the second embodiment is not limited to the manufacturing method of FIG. 6.
  • the adhesive is applied to both surfaces of the second sheet 3 formed into a tooth shape. It may be a step.
  • one side of the first sheet 2 is brought into contact with one side of the second sheet 3 having both sides coated with an adhesive, and the other side of the second sheet 3
  • One surface of the third sheet 8 may be brought into contact with the surface.
  • the first sheet 2 and the second sheet 3 or the second sheet 3 and the third sheet 8 are not limited to the adhesive, but may be bonded with an adhesive or a double-sided tape.
  • an adhesive or grease is applied to the entire surface or a part of the first sheet 2, the second sheet 3 or the third sheet 8 in order to increase the adhesion.
  • the application is optional.
  • it is optional to mix aramid fiber, glass fiber, other resin, and the like for the purpose of heat resistance and flame retardancy.
  • the shapes of the various gears in the drawings and the irregularities processed thereby are not limited to the forms illustrated in the present application.
  • the paper sheet according to the present invention can be used, for example, as a material for contacting or covering various electronic devices such as a battery for an automobile, an automobile, an industrial robot, a power generator, a PC, and household appliances. it can.

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Abstract

[Problem] To provide a paper sheet that is lightweight and soft, has excellent scratch resistance, allows for dissipation of heat from a product, prevents charging of a product, and enables shielding against electromagnetic waves from a product or shielding of a product from electromagnetic waves, and a method for manufacturing the same. [Solution] The present invention provides a paper sheet 1 that allows for dissipation of heat from a product, prevents charging of a product, and enables shielding against electromagnetic waves from a product or shielding of a product from external electromagnetic waves. The paper sheet 1 is provided with: a first sheet 2; and a second sheet 3 that is fixed to one surface of the first sheet 2 and has a shape in which continuous irregularities are repeated toward a prescribed direction. At least one of the first sheet 2 and the second sheet 3 is a sheet containing a carbon-based filler. The second sheet 3 is provided such that spaces 4 are formed between the first sheet 2 and the irregularities.

Description

紙シートおよび紙シートの製造方法Paper sheet and paper sheet manufacturing method クロスリファレンスCross reference
　本出願は、２０１８年７月２４日に日本国において出願された特願２０１８－１３８１８７に基づき優先権を主張し、当該出願に記載された内容は、本明細書に援用する。また、本願において引用した特許、特許出願及び文献に記載された内容は、本明細書に援用する。 This application claims priority based on Japanese Patent Application No. 2018-138187 filed in Japan on July 24, 2018, and the contents described in the application are incorporated herein by reference. The contents described in the patents, patent applications, and documents cited in the present application are incorporated herein by reference.
　本発明は、紙シートおよび紙シートの製造方法に関する。 The present invention relates to a paper sheet and a method for manufacturing the paper sheet.
　自動車、航空機、船舶あるいは家庭用若しくは業務用電子機器の制御システムは、より高精度かつ複雑化してきており、それに伴って、回路基板上の小型電子部品の集積密度が増加の一途を辿っている。この結果、回路基板周辺の発熱による電子部品の故障や短寿命化を解決することが強く望まれている。 Control systems for automobiles, aircraft, ships, or home or commercial electronics are becoming more precise and complex, and with it, the integration density of small electronic components on circuit boards is ever increasing. . As a result, it is strongly desired to solve the problem and shorten the life of electronic components due to heat generation around the circuit board.
　回路基板からの速やかな放熱を実現するには、従来から、回路基板自体を放熱性に優れた材料で構成し、ヒートシンクを取り付け、あるいは冷却ファンを駆動するといった手段を単一で若しくは複数組み合わせて行われている。これらの内、回路基板自体を放熱性に優れた材料、例えばダイヤモンド、窒化アルミニウム、立方晶窒化ホウ素などから構成する方法は、回路基板のコストを極めて高くしてしまう。また、冷却ファンの配置は、ファンという回転機器の故障、故障防止のためのメンテナンスの必要性や設置スペースの確保が難しいという問題を生じる。これに対して、放熱フィンは、熱伝導性の高い金属（例えば、アルミニウム）を用いた柱状あるいは平板状の突出部位を数多く形成することによって表面積を大きくして放熱性をより高めることのできる簡易な部材であるため、放熱部品として汎用的に用いられている（特許文献１を参照）。 To achieve rapid heat dissipation from the circuit board, conventionally, the circuit board itself is made of a material with excellent heat dissipation, and a single heat sink or a means for driving a cooling fan is used singly or in combination. Is being done. Of these, the method of forming the circuit board itself from a material having excellent heat dissipation properties, such as diamond, aluminum nitride, cubic boron nitride, etc., significantly increases the cost of the circuit board. In addition, the arrangement of the cooling fan causes a problem that a rotating device called a fan malfunctions, necessity of maintenance for preventing the malfunction, and difficulty in securing an installation space arise. On the other hand, the radiation fin has a large surface area by forming a large number of columnar or flat protruding portions using a metal (for example, aluminum) having a high thermal conductivity, so that heat radiation can be further improved. It is widely used as a heat dissipating component because it is a simple member (see Patent Document 1).
　また、近年、電子機器に搭載される電子部品から発生する電磁波が他の製品や人体に対して影響を及ぼす電磁波障害が、大きな問題となっている。このような電磁波に対する防御手段の一つとして、電磁波シールド材あるいは帯電防止材の開発が課題となっている。電磁波シールド材として、例えば、絶縁性材料からなる保護層と、保護層の一方または双方の面に積層した金属層とを有する電磁波シールド用フィルムが開発されている（特許文献２を参照）。 近年 In recent years, an electromagnetic wave generated from an electronic component mounted on an electronic device has a serious problem of electromagnetic wave interference affecting other products and the human body. As one of the protection means against such an electromagnetic wave, development of an electromagnetic wave shielding material or an antistatic material has been an issue. As an electromagnetic wave shielding material, for example, an electromagnetic wave shielding film having a protective layer made of an insulating material and a metal layer laminated on one or both surfaces of the protective layer has been developed (see Patent Document 2).
特開２００８－２４３９９９JP 2008-243999A 特開２００６－１５６９４６JP 2006-156946 A
　このような回路基板や電子部品等の製品の放熱、製品の帯電防止、製品から発する電磁波若しくは外部からの電磁波を遮蔽して製品を保護するために、黒鉛や非晶質炭素を含有する熱硬化性の樹脂板を用いる方法が考えられる。しかし、かかる樹脂板は硬く、傷付きやすく、上述の製品との密着性が低く、さらには重いという問題がある。 Thermosetting containing graphite or amorphous carbon to protect products by radiating heat from products such as circuit boards and electronic components, preventing the products from being charged, and shielding electromagnetic waves emitted from the products or external electromagnetic waves A method using a resin plate having a property can be considered. However, there is a problem that such a resin plate is hard, easily damaged, has low adhesion to the above-described product, and is heavy.
　本発明は、上記課題を解決するべく、軽量で、柔らかく、防傷性にも優れ、製品の放熱性、製品の帯電防止、および製品からの電磁波若しくは製品への電磁波の遮蔽を可能とする紙シートおよびその製造方法を提供することを目的とする。 The present invention has been made to solve the above-mentioned problems, and is a paper which is lightweight, soft, and excellent in anti-scratch property, capable of heat radiation of a product, antistatic of a product, and shielding electromagnetic waves from or to a product. It is an object to provide a sheet and a method for manufacturing the sheet.
（１）上記目的を達成するための一実施形態に係る紙シートは、製品からの放熱、製品の帯電防止、および製品からの電磁波若しくは外部から製品への電磁波の遮蔽を可能とする紙シートであって、第１シートと、前記第１シートの一面に固定され、所定方向に向かって連続した凹凸を繰り返す形状を有する第２シートと、を備え、前記第１シートおよび前記第２シートのうち少なくとも一方は、炭素系フィラーを含有するシートであり、前記第２シートは、前記第１シートと前記凹凸との間に空間が形成されるように設けられる。 (1) A paper sheet according to an embodiment for achieving the above object is a paper sheet capable of releasing heat from a product, preventing the product from being charged, and shielding electromagnetic waves from the product or electromagnetic waves from the outside to the product. A first sheet; and a second sheet fixed to one surface of the first sheet and having a shape that repeats continuous irregularities in a predetermined direction, wherein the first sheet and the second sheet At least one is a sheet containing a carbon-based filler, and the second sheet is provided such that a space is formed between the first sheet and the irregularities.
（２）別の実施形態に係る紙シートは、好ましくは、前記第２シートのうち前記第１シートと反対側の面に固定される第３シートを備える。 (2) The paper sheet according to another embodiment preferably includes a third sheet fixed to a surface of the second sheet opposite to the first sheet.
（３）別の実施形態に係る紙シートにおいて、好ましくは、前記第３シートは、炭素系フィラーを含有するシートである。 (3) In the paper sheet according to another embodiment, preferably, the third sheet is a sheet containing a carbon-based filler.
（４）別の実施形態に係る紙シートにおいて、好ましくは、前記空間は、一方向に長い形状であって、両端開放型の筒あるいは一端開放型のカップの形態を有する。 (4) In the paper sheet according to another embodiment, preferably, the space has a shape that is long in one direction, and has a form of a cylinder open at both ends or a cup open at one end.
（５）別の実施形態に係る紙シートにおいて、好ましくは、前記炭素系フィラーを含有するシートは、当該シートに対して前記炭素系フィラーを３０質量％以上含有する。 (5) In the paper sheet according to another embodiment, preferably, the sheet containing the carbon-based filler contains the carbon-based filler in an amount of 30% by mass or more based on the sheet.
（６）一実施形態に係る紙シートの製造方法は、回転可能な第１歯車と、前記第１歯車と噛み合って回転する第２歯車と、前記第１歯車と前記第２歯車との接触位置より前記第２歯車の回転方向下流側に位置する接着剤塗布部と、前記接着剤塗布部より前記第２歯車の回転方向下流側に位置するシート送り部と、を備える装置を用いて請求項１から５のいずれか１項に記載の紙シートを製造する方法であって、前記第２シートを成形する前のプレシートを、前記接触位置に対して前記接着剤塗布部の反対側から前記接触位置に挿入する挿入ステップと、前記プレシートを前記第２歯車の歯形に成形しながら前記第２歯車の進行方向に送る成形ステップと、前記歯形に成形された部分を前記接着剤塗布部に接触させて、前記第２シートの成形部分に接着剤を塗布する塗布ステップと、前記シート送り部から送られてきた第１シートの片面に、前記プレシートを成形した前記第２シートの前記接着剤を塗布した部分を接触させる接触ステップと、を含む。 (6) The method of manufacturing a paper sheet according to one embodiment includes a rotatable first gear, a second gear that meshes with the first gear and rotates, and a contact position between the first gear and the second gear. An apparatus comprising: an adhesive application unit located further downstream in the rotation direction of the second gear; and a sheet feeder located downstream in the rotation direction of the second gear from the adhesive application unit. The method for producing a paper sheet according to any one of 1 to 5, wherein the pre-sheet before forming the second sheet is contacted with the pre-sheet from the side opposite to the adhesive application section with respect to the contact position. An insertion step of inserting the pre-sheet into a tooth shape of the second gear, and a forming step of feeding the pre-sheet in the traveling direction of the second gear, and contacting the portion formed into the tooth shape with the adhesive application section. And a forming part of the second sheet An application step of applying an adhesive, and a contact step of contacting a portion of the second sheet formed with the pre-sheet, to which the adhesive has been applied, on one surface of the first sheet sent from the sheet feeding unit, including.
（７）一実施形態に係る紙シートの製造方法は、回転可能な第１歯車と、前記第１歯車と噛み合って回転する第２歯車と、前記第１歯車と前記第２歯車との接触位置より前記第２歯車の回転方向下流側に位置する接着剤塗布部と、前記接着剤塗布部より前記第２歯車の回転方向下流側に位置するシート送り部と、を備える装置を用いて請求項１から５のいずれか１項に記載の紙シートを製造する方法であって、前記第２シートを成形する前のプレシートを、前記接触位置に対して前記接着剤塗布部の反対側から前記接触位置に挿入する挿入ステップと、前記プレシートを前記第２歯車の歯形に成形しながら前記第２歯車の進行方向に送る成形ステップと、前記第１シートの片面を前記接着剤塗布部に接触させて接着剤を塗布する塗布ステップと、前記シート送り部から送られてきた第１シートの片面に、前記プレシートを成形した前記第２シートを接触させる接触ステップと、を含む。 (7) The method for manufacturing a paper sheet according to one embodiment includes a rotatable first gear, a second gear that meshes with the first gear and rotates, and a contact position between the first gear and the second gear. An apparatus comprising: an adhesive application unit located further downstream in the rotation direction of the second gear; and a sheet feeder located downstream in the rotation direction of the second gear from the adhesive application unit. The method for producing a paper sheet according to any one of 1 to 5, wherein the pre-sheet before forming the second sheet is contacted with the pre-sheet from the side opposite to the adhesive application section with respect to the contact position. An insertion step of inserting the pre-sheet in a traveling direction of the second gear while forming the pre-sheet into a tooth shape of the second gear; and contacting one surface of the first sheet with the adhesive application section. Application step of applying adhesive , On one side of the first sheet sent from the sheet feeding unit includes a contact step of contacting the second sheet molded the Pureshito.
（８）別の実施形態に係る紙シートの製造方法は、好ましくは、木材片および／または古紙をパルプ化して木材パルプを製造する製造ステップと、炭素系フィラーと前記木材パルプとを混合して混合パルプを製造する混合ステップと、前記混合パルプを製紙する製紙ステップと、を前記挿入ステップに先立って含み、前記第１シートおよび前記プレシートのうち少なくとも一方は、前記混合パルプを製紙して製造されたシートである。 (8) The paper sheet manufacturing method according to another embodiment is preferably a manufacturing step of pulping wood pieces and / or waste paper to manufacture wood pulp, and mixing a carbon-based filler and the wood pulp. Including a mixing step of manufacturing mixed pulp and a papermaking step of papermaking the mixed pulp prior to the inserting step, wherein at least one of the first sheet and the presheet is manufactured by papermaking the mixed pulp. Sheet.
　本発明によれば、柔らかく、防傷性に優れ、放熱あるいは帯電防止の対象となる製品への密着性にも優れ、かつ軽量化を図ることができる。 According to the present invention, it is soft, has excellent scratch resistance, has excellent adhesion to a product to be radiated or prevented from being charged, and can be reduced in weight.
図１Ａは、第１実施形態に係る紙シートの一部の斜視図を示す。FIG. 1A is a perspective view of a part of the paper sheet according to the first embodiment. 図１Ｂは、第１実施形態に係る紙シートを厚さ方向に圧縮した状態の斜視図を示す。FIG. 1B is a perspective view showing a state in which the paper sheet according to the first embodiment is compressed in the thickness direction. 図２は、第１実施形態に係る紙シートの製造方法の一部の概略フロー図を示す。FIG. 2 is a schematic flowchart of a part of the method for manufacturing a paper sheet according to the first embodiment. 図３は、第１実施形態に係る紙シートの製造方法の一部の概略フロー図を示す。FIG. 3 is a schematic flowchart of a part of the method for manufacturing a paper sheet according to the first embodiment. 図４は、図３の製造方法に用いる装置の一例を示す。FIG. 4 shows an example of an apparatus used in the manufacturing method of FIG. 図５は、第２実施形態に係る紙シートの一部の斜視図を示す。FIG. 5 is a perspective view of a part of the paper sheet according to the second embodiment. 図６は、第２実施形態に係る紙シートの製造方法の一部の概略フロー図を示す。FIG. 6 is a schematic flowchart of a part of the method for manufacturing a paper sheet according to the second embodiment. 図７は、図６の製造方法に用いる装置の一例を示す。FIG. 7 shows an example of an apparatus used in the manufacturing method of FIG.
１，８１・・・紙シート、２・・・第１シート、３・・・第２シート、３ａ・・・プレシート、４・・・空間、８・・・第３シート、３０，８０・・・装置、３１・・・第１歯車、３２・・・第２歯車、３３・・・接着剤塗布部、３４・・・シート送り部、３６・・・接触位置。 1, 81 ... paper sheet, 2 ... first sheet, 3 ... second sheet, 3a ... pre-sheet, 4 ... space, 8 ... third sheet, 30, 80 ... · Apparatus, 31 ··· first gear, 32 ··· second gear, 33 ··· adhesive application section, 34 ··· sheet feed section, 36 ··· contact position.
　次に、本発明の各実施形態について、図面を参照して説明する。なお、以下に説明する各実施形態は、特許請求の範囲に係る発明を限定するものではなく、また、各実施形態の中で説明されている諸要素及びその組み合わせの全てが本発明の解決手段に必須であるとは限らない。 Next, embodiments of the present invention will be described with reference to the drawings. It should be noted that each embodiment described below does not limit the invention according to the claims, and all of the elements and combinations thereof described in each embodiment are not limited to the invention. Is not always required.
（第１実施形態）
　図１Ａは、第１実施形態に係る紙シートの一部の斜視図を示す。 (1st Embodiment)
FIG. 1A is a perspective view of a part of the paper sheet according to the first embodiment.
　紙シート１は、広義には、製品からの放熱、製品の帯電防止、および／または製品からの電磁波若しくは外部から製品への電磁波の遮蔽を可能とする紙シートである。紙シート１は、第１シート２と、第１シート２の一面に固定され、所定方向に向かって連続した凹凸を繰り返す形状を有する第２シート３と、を備える。また、第１シート２および第２シート３のうち少なくとも一方は、炭素系フィラーを含有するシートである。また、第２シート３は、第１シート２と凹凸との間に空間４が形成されるように設けられる。第１シート２は、この実施形態では、好ましくは、平板である。ただし、第１シート２は、一方向に峰と谷を繰り返す波形状の板であっても良い。第２シート３は、図１Ａの紙面右方向に波形状に、線状の凹部と凸部を繰り返す蛇腹状のシートである。ただし、第２シート３は、複数の方向に向かって連続した凹凸を繰り返す形状を有していても良い。空間４は、この実施形態では、第２シート３の凹凸の凸部の数だけ存在する。ただし、空間４は、第２シート３の凸部の数だけ存在させるのではなく、凸部の２以上を連通させて凸部の数より少なく形成されていても良い。 Paper sheet 1 is a paper sheet that can release heat from a product, prevent the product from being charged, and / or shield electromagnetic waves from the product or electromagnetic waves from the outside to the product in a broad sense. The paper sheet 1 includes a first sheet 2 and a second sheet 3 that is fixed to one surface of the first sheet 2 and that has a shape that repeats continuous irregularities in a predetermined direction. At least one of the first sheet 2 and the second sheet 3 is a sheet containing a carbon-based filler. The second sheet 3 is provided so that a space 4 is formed between the first sheet 2 and the unevenness. In this embodiment, the first sheet 2 is preferably a flat plate. However, the first sheet 2 may be a wave-shaped plate that repeats peaks and valleys in one direction. The second sheet 3 is a bellows-like sheet in which linear concave and convex portions are repeated in a wave shape rightward on the paper surface of FIG. 1A. However, the second sheet 3 may have a shape in which continuous irregularities are repeated in a plurality of directions. In this embodiment, the spaces 4 are present by the number of the convex portions of the irregularities of the second sheet 3. However, the space 4 may not be formed by the number of protrusions of the second sheet 3, but may be formed by connecting two or more of the protrusions to be smaller than the number of protrusions.
　空間４は、一方向（図１Ａの紙面奥に延びる方向）に長い形状であって、両端開放型の筒の形態を有する。ただし、空間４は、図１Ａの紙面表側の面だけを開口し、紙面奥方向の端面を塞いだ、いわゆる一端開放型のカップの形態を有していても良い。さらには、空間４は、その長さ方向の両端を塞いだ形態を有していても良い。 The space 4 has a shape that is long in one direction (a direction extending in the depth of the paper of FIG. 1A), and has a shape of an open-ended cylinder. However, the space 4 may have a form of a so-called one-end open cup in which only the front surface of the paper surface of FIG. 1A is opened and the end surface in the depth direction of the paper surface is closed. Further, the space 4 may have a form in which both ends in the length direction are closed.
　第２シート３は、凸部の開口端部（凹部の底部も含む）にて第１シート２と接続されている。接続方式は、接着、嵌め込み、融着等の如何なる方式でも良い。接着剤を用いて第２シート３を第１シート２に接続する場合には、耐熱性に優れた接着剤を用いるのが好ましい。接着剤は、熱伝導性に優れている方が好ましいが、熱伝導性の低いものでも良い。 The second sheet 3 is connected to the first sheet 2 at the opening end of the projection (including the bottom of the recess). The connection method may be any method such as adhesion, fitting, fusion and the like. When connecting the second sheet 3 to the first sheet 2 using an adhesive, it is preferable to use an adhesive having excellent heat resistance. The adhesive preferably has excellent thermal conductivity, but may have low thermal conductivity.
　第１シート２および第２シート３は、板状の紙（以下、「板紙」という。）で形成されている。板紙は、その種類に特に制限は無く、例えば、古紙パルプやクラフトパルプを原料とする一層抄きまたは多層抄きの板紙であっても良い。なお、第１シート２および第２シート３は、同一の材料から成るか否かを問わない。また、第１シート２および第２シート３のうち少なくとも一方は、炭素系フィラーを含有するシートであることが好ましい。本願でいう「炭素」は、グラファイト、グラファイトより結晶性の低いカーボンブラック、膨張黒鉛、ダイヤモンド、ダイヤモンドに近い構造を持つダイヤモンドライクカーボン等の炭素（元素記号：Ｃ）から成る如何なる構造のものも含むように広義に解釈される。第１シート２および第２シート３は、この実施形態では、炭素系フィラーを含有するシートであり、具体的には、木材パルプにグラファイトを混合した混合パルプを原料とする板紙である。第１シート２および第２シート３が炭素系フィラーを含有する場合には、当該シート２，３に対して炭素系フィラーを３０質量％以上含有することが好ましく、炭素系フィラーを５０質量％以上含有することがより好ましい。なお、第１シート２および第２シート３に対する炭素系フィラーの含有率が同一であるか否かは問わない。 The first sheet 2 and the second sheet 3 are formed of a sheet of paper (hereinafter, referred to as “board”). The type of paperboard is not particularly limited, and may be, for example, a single- or multi-layer paperboard made from waste paper pulp or kraft pulp. It should be noted that the first sheet 2 and the second sheet 3 may or may not be made of the same material. Further, at least one of the first sheet 2 and the second sheet 3 is preferably a sheet containing a carbon-based filler. As used herein, “carbon” includes any structure of carbon (element symbol: C) such as graphite, carbon black having lower crystallinity than graphite, expanded graphite, diamond, and diamond-like carbon having a structure similar to diamond. Is interpreted in a broad sense. In this embodiment, the first sheet 2 and the second sheet 3 are sheets containing a carbon-based filler, and specifically, are a paperboard made of a mixed pulp obtained by mixing wood pulp with graphite. When the first sheet 2 and the second sheet 3 contain a carbon-based filler, the sheets 2 and 3 preferably contain the carbon-based filler in an amount of 30% by mass or more, and the carbon-based filler in an amount of 50% by mass or more. More preferably, it is contained. It does not matter whether the content of the carbon-based filler in the first sheet 2 and the second sheet 3 is the same.
　この実施形態において、第１シート２および第２シート３は、炭素系フィラーを含有することから、導電性および電磁波遮蔽性に優れたシートである。また、第１シート２および第２シート３は、熱伝導性にも優れている。第１シート２または第２シート３の熱伝導率は、等方的な熱伝導性を奏する場合には、好ましくは５Ｗ／ｍＫ以上、より好ましくは１０Ｗ／ｍＫ以上である。また、第１シート２または第２シート３がその面方向とその厚み方向とで異なる熱伝導性を有する場合もある。炭素系フィラーが繊維状若しくはウィスカー状であって、当該炭素系フィラーが上記面方向に配向している場合には、例えば、面方向の熱伝導率が１００Ｗ／ｍＫであって、厚さ方向の熱伝導率が２Ｗ／ｍＫというように、方向によって熱伝導率の差が大きいこともある。第２シート３は、湾曲（若しくは屈曲）しやすいシートであるのが好ましく、その厚さに制約はないが、０．０５～５ｍｍが好ましく、０．０６５～０．５ｍｍがより好ましい。 に お い て In this embodiment, the first sheet 2 and the second sheet 3 are sheets excellent in conductivity and electromagnetic wave shielding properties because they contain a carbon-based filler. Further, the first sheet 2 and the second sheet 3 have excellent thermal conductivity. The thermal conductivity of the first sheet 2 or the second sheet 3 is preferably 5 W / mK or more, and more preferably 10 W / mK or more, when exhibiting isotropic thermal conductivity. Further, the first sheet 2 or the second sheet 3 may have different thermal conductivity in the plane direction and the thickness direction. When the carbon-based filler is fibrous or whisker-shaped and the carbon-based filler is oriented in the plane direction, for example, the thermal conductivity in the plane direction is 100 W / mK and the thickness direction is 100 W / mK. There may be a large difference in thermal conductivity depending on the direction, such as a thermal conductivity of 2 W / mK. The second sheet 3 is preferably a sheet that easily bends (or bends), and the thickness thereof is not limited, but is preferably 0.05 to 5 mm, more preferably 0.065 to 0.5 mm.
　紙シート１は、例えば、製品の表面が第２シート３に当接するなど、第２シート３から第１シート２に至る厚さ方向に圧縮力を受けると、図１Ｂに示す状態になる。すなわち、第２シート３の凹凸構造が崩れて空間４が潰れる。第２シート３は、凹凸を繰り返す形状を有し、凸部がその隣の凹部側に倒れるように変形できる。紙シート１の厚さ方向に圧縮力を加えられていないときには、第１シート２は、第２シート３の開口端部のみで接触している。しかし、当該圧縮力を受けると、第１シート２は、第２シート３の開口端部以外の部分にも接触する状態になる。これによって、第１シート２と第２シート３との間の熱伝導性がより高くなる。また、第１シート２と第２シート３との間の導電性もより高くなる。また、紙シート１は、製品から発生される電磁波の遮蔽にも有効である。空間４は、製品の表面が凹凸を有していても第１シート２および第２シート３に製品を接触しやすいようにする役割を持つ。 (1) When the paper sheet 1 receives a compressive force in the thickness direction from the second sheet 3 to the first sheet 2 such that the surface of the product comes into contact with the second sheet 3, for example, the state shown in FIG. 1B is obtained. That is, the uneven structure of the second sheet 3 collapses, and the space 4 is collapsed. The second sheet 3 has a shape that repeats irregularities, and can be deformed such that the convex portion falls down to the adjacent concave portion side. When no compressive force is applied in the thickness direction of the paper sheet 1, the first sheet 2 is in contact only at the opening end of the second sheet 3. However, when receiving the compressive force, the first sheet 2 comes into contact with a portion other than the opening end of the second sheet 3. Thereby, the thermal conductivity between the first sheet 2 and the second sheet 3 becomes higher. Further, the conductivity between the first sheet 2 and the second sheet 3 is further increased. The paper sheet 1 is also effective for shielding electromagnetic waves generated from products. The space 4 has a role of facilitating the contact of the product with the first sheet 2 and the second sheet 3 even if the surface of the product has irregularities.
　なお、紙シート１は、例えば、製品の表面が第１シート２に当接するなど、第１シート２から第２シート３に至る厚さ方向に圧縮力を受けるように、製品と紙シート１とを配置しても良い。この場合においても、第２シート３の凹凸構造が崩れて空間４が潰れる。これによって、第１シート２と第２シート３との間の熱伝導性がより高くなる。また、第１シート２と第２シート３との間の導電性もより高くなる。 It should be noted that the paper sheet 1 is formed so that the product and the paper sheet 1 are subjected to a compressive force in the thickness direction from the first sheet 2 to the second sheet 3 such that the surface of the product abuts on the first sheet 2. May be arranged. Also in this case, the concavo-convex structure of the second sheet 3 collapses, and the space 4 is collapsed. Thereby, the thermal conductivity between the first sheet 2 and the second sheet 3 becomes higher. Further, the conductivity between the first sheet 2 and the second sheet 3 is further increased.
　図２および図３は、第１実施形態に係る紙シートの製造方法の一部の概略フロー図を示す。 FIGS. 2 and 3 are schematic flowcharts showing a part of the method for manufacturing a paper sheet according to the first embodiment.
　第１実施形態に係る紙シートの製造方法は、まず、木材パルプの製造ステップ（製造ステップの一例；Ｓ１００）、混合パルプの製造ステップ（混合ステップの一例；Ｓ１１０）、製紙ステップ（Ｓ１２０）の順に工程を行い、第１シート２および第２シート３を成形する前のプレシート３ａを製造する。そして、Ｓ１００～Ｓ１２０により製造した第１シート２およびプレシート３ａを用いて、プレシートの挿入ステップ（挿入ステップの一例；Ｓ２００）、プレシートの成形ステップ（成形ステップの一例；Ｓ２１０）、接着剤の塗布ステップ（塗布ステップの一例；Ｓ２２０）、第１シート２と第２シート３との接触ステップ（接触ステップの一例；Ｓ２３０）の順に工程を行い、紙シート１を製造する。 The method for manufacturing a paper sheet according to the first embodiment includes a manufacturing step of a wood pulp (an example of a manufacturing step; S100), a manufacturing step of a mixed pulp (an example of a mixing step; S110), and a papermaking step (S120) in this order. The process is performed to manufacture a pre-sheet 3a before the first sheet 2 and the second sheet 3 are formed. Then, using the first sheet 2 and the pre-sheet 3a manufactured in S100 to S120, a pre-sheet insertion step (an example of an insertion step; S200), a pre-sheet molding step (an example of a molding step; S210), an adhesive application step (Example of application step; S220), the steps of contacting the first sheet 2 and the second sheet 3 (example of contact step: S230) are performed in this order, and the paper sheet 1 is manufactured.
　まず、第１シート２および第２シート３を成形する前のプレシート３ａを製造する方法の各工程（Ｓ１００～Ｓ１２０）について、説明する。 First, the respective steps (S100 to S120) of the method for manufacturing the pre-sheet 3a before forming the first sheet 2 and the second sheet 3 will be described.
（１）木材パルプの製造ステップ（Ｓ１００）
　当該製造ステップは、木材片および／または古紙をパルプ化して木材パルプを製造するステップである。より詳しくは、木材片をパルプ化する場合、木材片（チップ）を蒸解釜で薬品を加えて煮込んで木材繊維を取り出し、当該木材繊維を洗浄および漂白することにより木材パルプが製造される（化学パルプ）。なお、木材パルプは、木材片をリファイナーですりつぶし、その後スクリーンで塵を除去して漂白することにより得られた木材繊維を調成して製造されても良い（機械パルプ）。また、古紙をパルプ化する場合には、古紙をパルパーに投入してかゆ状にほぐし、ごみや塵などの異物や、界面活性剤等の薬剤を除去することにより木材パルプが製造される。なお、この製造ステップ（Ｓ１００）により製造される木材パルプは、木材片または古紙のみから製造される木材パルプであってもよいし、木材片から製造されるパルプと古紙から製造されるパルプとを混合して木材パルプとしても良い。 (1) Wood pulp manufacturing step (S100)
The production step is a step of pulping wood pieces and / or waste paper to produce wood pulp. More specifically, in the case of pulping wood pieces, wood pieces (chips) are added with a chemical in a digester, boiled to take out wood fibers, and the wood fibers are washed and bleached to produce wood pulp. pulp). The wood pulp may be produced by grinding wood pieces with a refiner, and then removing the dust with a screen and bleaching the resulting wood fibers (mechanical pulp). In the case of pulping waste paper, wood pulp is produced by throwing waste paper into a pulp and loosening it in a pruritic manner to remove foreign substances such as dirt and dust and chemicals such as a surfactant. The wood pulp manufactured in this manufacturing step (S100) may be wood pulp manufactured only from wood pieces or waste paper, or pulp manufactured from wood pieces and pulp manufactured from waste paper. Wood pulp may be mixed.
（２）混合パルプの製造ステップ（Ｓ１１０）
　当該製造ステップは、炭素系フィラーと木材パルプとを混合して混合パルプを製造するステップである。より詳しくは、混合パルプは、木材パルプを水などの溶媒に分散させた懸濁液であるパルプスラリーに、炭素系フィラーを混合することにより製造される。パルプスラリーに混合する炭素系フィラーの量は、混合パルプと炭素系フィラーの合計質量に対して、炭素系フィラーの質量が３０質量％以上となる量が好ましく、５０質量％以上となる量がより好ましい。また、紙シート１を構成する各シートの柔らかさをも兼ね備える目的によれば、炭素系フィラーの質量は、上記合計質量に対して、３０～８０質量％、あるいは５０～８０質量％以下であるのが好ましい。 (2) Step of producing mixed pulp (S110)
The production step is a step of producing a mixed pulp by mixing a carbon-based filler and wood pulp. More specifically, the mixed pulp is manufactured by mixing a carbon-based filler with a pulp slurry, which is a suspension in which wood pulp is dispersed in a solvent such as water. The amount of the carbon-based filler mixed into the pulp slurry is preferably such that the mass of the carbon-based filler is at least 30% by mass, more preferably at least 50% by mass, based on the total mass of the mixed pulp and the carbon-based filler. preferable. Further, according to the purpose of also providing the softness of each sheet constituting the paper sheet 1, the mass of the carbon-based filler is 30 to 80% by mass, or 50 to 80% by mass or less based on the total mass. Is preferred.
（３）製紙ステップ（Ｓ１２０）
　当該製紙ステップは、混合パルプを製紙するステップである。より詳しくは、混合パルプをワイヤー上に吹き出してシートを生成し、脱水および乾燥することにより紙が製造される。その後、紙の表面を滑らかにしてリールで巻き取り、所定の大きさに断裁される。 (3) Paper making step (S120)
The paper making step is a step of making mixed pulp. More specifically, paper is produced by blowing the mixed pulp onto a wire to produce a sheet, dewatering and drying. Thereafter, the surface of the paper is smoothed and taken up by a reel, and cut into a predetermined size.
　次に、第１シート２およびプレシート３ａを用いて、紙シート１を製造する方法の各工程（Ｓ２００～Ｓ２３０）について、説明する。図４は、図３の製造方法に用いる装置の一例を示す。 Next, each step (S200 to S230) of the method for manufacturing the paper sheet 1 using the first sheet 2 and the pre-sheet 3a will be described. FIG. 4 shows an example of an apparatus used in the manufacturing method of FIG.
　当該製造方法（Ｓ２００～Ｓ２３０）に用いられる装置３０としては、種々の装置を採用可能であるが、シングルフェーサを用いることが好ましい。より詳細には、装置３０は、回転可能な第１歯車３１と、第１歯車３１と噛み合って回転する第２歯車３２と、第１歯車３１と第２歯車３２との接触位置３６より第２歯車３２の回転方向下流側に位置する接着剤塗布部３３と、接着剤塗布部３３より第２歯車３２の回転方向下流側に位置するシート送り部３４と、を備える。ここで、「下流」とは、接触位置３６における第２歯車３２の回転方向を意味すると共に、プレシート３ａを送る方向の下流側を意味する。以後の「下流」も同様である。シート送り部３４は、第１シート２をその表面に沿って搬送する手段である。シート送り部３４は、例えば、第１シート２を点線矢印の方向に駆動するベルトを有するベルト搬送部、あるいは何らの駆動手段を有さずに第２歯車３２の回転によって第１シート２を点線矢印の方向に移動させる無駆動搬送部であっても良い。また、シート送り部３４は、ローラによって第１シート２を搬送する手段であっても良い。以下、各工程を、図４を参照しながら説明する。 装置 Various devices can be used as the device 30 used in the manufacturing method (S200 to S230), but it is preferable to use a single facer. More specifically, the apparatus 30 includes a first rotatable gear 31, a second gear 32 that rotates while meshing with the first gear 31, and a second gear 32 from a contact position 36 between the first gear 31 and the second gear 32. An adhesive application section 33 is located downstream of the gear 32 in the rotation direction, and a sheet feed section 34 is located downstream of the adhesive application section 33 in the rotation direction of the second gear 32. Here, “downstream” means a rotation direction of the second gear 32 at the contact position 36 and a downstream side in a direction in which the pre-sheet 3a is fed. The same applies to the subsequent “downstream”. The sheet feeding unit 34 is a unit that conveys the first sheet 2 along the surface thereof. The sheet feeding unit 34 is, for example, a belt conveyance unit having a belt for driving the first sheet 2 in the direction of the dotted arrow, or the first sheet 2 is rotated by the rotation of the second gear 32 without any driving means. A non-driving transport unit that moves in the direction of the arrow may be used. Further, the sheet feeding unit 34 may be a unit that conveys the first sheet 2 by a roller. Hereinafter, each step will be described with reference to FIG.
（４）プレシートの挿入ステップ（Ｓ２００）
　当該挿入ステップは、第２シート３を成形する前のプレシート３ａを、接触位置３６に対して接着剤塗布部３３の反対側から接触位置３６に挿入するステップである（矢印Ａの方向に挿入）。第１歯車３１はモータ等の駆動手段によって自転している（第１歯車３１における実線矢印の方向に自転）。第２歯車３２は、第１歯車３１と噛み合って、第１歯車３１に従動する（第２歯車３２における実線矢印の方向に従動）。 (4) Pre-sheet insertion step (S200)
The insertion step is a step of inserting the pre-sheet 3a before forming the second sheet 3 into the contact position 36 from the side opposite to the adhesive application section 33 with respect to the contact position 36 (inserted in the direction of arrow A). . The first gear 31 is rotated by driving means such as a motor (rotated in the direction of the solid arrow in the first gear 31). The second gear 32 meshes with the first gear 31 and is driven by the first gear 31 (driven by the direction of the solid arrow in the second gear 32).
（５）プレシートの成形ステップ（Ｓ２１０）
　当該成形ステップは、プレシート３ａを第２歯車３２の歯形に成形しながら第２歯車３２の進行方向に送るステップである。より詳しくは、プレシート３ａは、第１歯車３１と第２歯車３２とで挟まれて成形され、第２歯車３２の表面に付着しながら接着剤塗布部３３へと向かう。プレシート３ａは、接着剤塗布部３３の前段階で、接触位置３６において第２歯車３２の歯形を転写するように成形される。これによって、プレシート３ａは、第２シート３に成形される。 (5) Pre-sheet forming step (S210)
The forming step is a step of feeding the pre-sheet 3a in the traveling direction of the second gear 32 while forming the pre-sheet 3a into the tooth shape of the second gear 32. More specifically, the pre-sheet 3 a is formed by being sandwiched between the first gear 31 and the second gear 32, and heads toward the adhesive application section 33 while attaching to the surface of the second gear 32. The pre-sheet 3a is formed so as to transfer the tooth profile of the second gear 32 at the contact position 36 before the adhesive application section 33. As a result, the pre-sheet 3a is formed into the second sheet 3.
（６）接着剤の塗布ステップ（Ｓ２２０）
　当該塗布ステップは、第２シート３における歯形に成形された部分を接着剤塗布部３３に接触させて、第２シート３の成形部分に接着剤を塗布するステップである。接着剤塗布部３３は、好ましくは、ローラの形状を有しており、モータ等の駆動手段によって自転するか、若しくは第２歯車３２等の他の回転部材に従動する（接着剤塗布部３３における実線矢印の方向に自転）。接着剤塗布部３３は、好ましくは、その表面に接着剤を保持した接着剤保持部３５を備える。第２歯車３２と接着剤塗布部３３との隙間３７は、成形された第２シート３が接着剤を付着した状態で通過できる幅を有する。なお、接着剤塗布部３３は、ローラの形状を有する部材に限定されず、例えば、接着剤を保持した平板、接着剤を蓄えた容器、あるいは接着剤を保持した刷毛であっても良い。 (6) Adhesive application step (S220)
The application step is a step in which the tooth-shaped part of the second sheet 3 is brought into contact with the adhesive application part 33 to apply the adhesive to the molded part of the second sheet 3. The adhesive application section 33 preferably has the shape of a roller, and rotates by driving means such as a motor, or is driven by another rotating member such as the second gear 32 (in the adhesive application section 33). It rotates in the direction of the solid arrow). The adhesive application section 33 preferably includes an adhesive holding section 35 having an adhesive held on its surface. The gap 37 between the second gear 32 and the adhesive application section 33 has a width that allows the formed second sheet 3 to pass with the adhesive applied. The adhesive application section 33 is not limited to a member having the shape of a roller, and may be, for example, a flat plate holding the adhesive, a container storing the adhesive, or a brush holding the adhesive.
（７）第１シートと第２シートとの接触ステップ（Ｓ２３０）
　第１シートと第２シートとの接触ステップは、シート送り部３４から送られてきた第１シート２（矢印Ｂの方向に搬送）の片面に、プレシート３ａを成形した第２シート３の接着剤を塗布した部分を接触させるステップである。「接触」は、接合あるいは接着と読み替えても良い。以後の「接触」も同様である。第１シート２は、シート送り部３４の表面３８に沿って搬送される（表面３８近傍の点線矢印の方向に搬送）。シート送り部３４は、表面３８と第２歯車３２との間に隙間３９を隔てて配置されている。表面３８は、第１シート２を滑らかに搬送可能な面である。隙間３９は、第１シート２に第２シート３を接着させた状態で通過可能な幅で形成されている。これにより、紙シート１が完成する。 (7) Contact step between the first sheet and the second sheet (S230)
The step of contacting the first sheet with the second sheet is performed by bonding the first sheet 2 (conveyed in the direction of arrow B) sent from the sheet feeding section 34 to the adhesive of the second sheet 3 formed with the pre-sheet 3a. This is a step of contacting a portion to which is applied. “Contact” may be read as bonding or bonding. The same applies to the subsequent “contact”. The first sheet 2 is conveyed along the front surface 38 of the sheet feeding unit 34 (conveyed in the direction of the dotted arrow near the front surface 38). The sheet feeding section 34 is arranged with a gap 39 between the front surface 38 and the second gear 32. The front surface 38 is a surface on which the first sheet 2 can be smoothly conveyed. The gap 39 is formed to have a width that allows the second sheet 3 to pass through with the first sheet 2 adhered to the second sheet 3. Thereby, the paper sheet 1 is completed.
　なお、接着剤塗布部３３は、シート送り部３４の近傍に配置されていても良い。この場合、接着剤は、第１シート２の片面に塗布される。その場合、接着剤の塗布ステップ（Ｓ２２０）は、第１シート２の片面を接着剤塗布部３３に接触させて接着剤を塗布するステップとなる。また、第１シートと第２シートとの接触ステップ（Ｓ２３０）は、シート送り部３４から送られてきた第１シート２の片面（すなわち、接着剤の塗布された面）に、プレシートを成形した第２シート３を接触させるステップとなる。 The adhesive application section 33 may be arranged near the sheet feeding section 34. In this case, the adhesive is applied to one surface of the first sheet 2. In this case, the adhesive application step (S220) is a step in which one side of the first sheet 2 is brought into contact with the adhesive application section 33 to apply the adhesive. Further, in the step of contacting the first sheet and the second sheet (S230), the pre-sheet is formed on one side of the first sheet 2 sent from the sheet feeding unit 34 (that is, the side to which the adhesive is applied). This is the step of bringing the second sheet 3 into contact.
（第２実施形態）
　次に、本発明の第２実施形態について説明する。第１実施形態と共通する部分については同じ符号を付して重複した説明を省略する。 (2nd Embodiment)
Next, a second embodiment of the present invention will be described. Portions common to the first embodiment are denoted by the same reference numerals, and redundant description will be omitted.
　図５は、第２実施形態に係る紙シートの一部の斜視図を示す。 FIG. 5 shows a perspective view of a part of the paper sheet according to the second embodiment.
　第２実施形態に係る紙シート８１は、第２シート３のうち第１シート２と反対側の面に固定される第３シート８を備える点において、第１実施形態に係る紙シート１と異なり、それら以外を共通とする。 The paper sheet 81 according to the second embodiment differs from the paper sheet 1 according to the first embodiment in that the paper sheet 81 according to the second embodiment includes a third sheet 8 fixed to the surface of the second sheet 3 opposite to the first sheet 2. , Other than them are common.
　第３シート８は、第１シート２および／または第２シート３と同様に、板紙で形成されたシートである。第３シート８は、炭素系フィラーを含有するシートであることが好ましい。この実施形態において、具体的には、第３シート８は、木材パルプにグラファイトを混合した混合パルプを原料とする板紙である。なお、第３シート８が炭素系フィラーを含有する場合には、第３シート８に対して炭素系フィラーを３０質量％以上含有することが好ましく、炭素系フィラーを５０質量％以上含有することがより好ましい。 The third sheet 8 is a sheet made of paperboard, like the first sheet 2 and / or the second sheet 3. The third sheet 8 is preferably a sheet containing a carbon-based filler. In this embodiment, specifically, the third sheet 8 is a paperboard made of a mixed pulp obtained by mixing wood pulp with graphite. When the third sheet 8 contains a carbon-based filler, the third sheet 8 preferably contains 30% by mass or more of the carbon-based filler, and preferably contains 50% by mass or more of the carbon-based filler. More preferred.
　紙シート８１は、第１実施形態と同様に、第３シート８から第１シート２に至る厚さ方向に圧縮力を受けると、第２シート３の凹凸構造が崩れて空間４が潰れる。第２シート３は、凹凸を繰り返す形状を有し、凸部がその隣の凹部側に倒れるように変形できる。紙シート８１の厚さ方向に圧縮力を加えられていないときには、第１シート２および第３シート８は、それぞれ第２シート３の開口端部のみで接触している。しかし、当該圧縮力を受けると、第１シート２および第３シート８は、第２シート３の開口端部以外の部分にも接触する状態になる。これによって、第３シート８と第２シート３との間の熱伝導性および導電性がより高くなるとともに、第１シート２と第２シート３との間の熱伝導性および導電性もより高くなる。また、紙シート８１は、製品の帯電防止のみならず、製品から発生される電磁波の遮蔽にも有効である。なお、紙シート８１は、例えば、製品の表面が第１シート２に当接するなど、第１シート２から第３シート８に至る厚さ方向に圧縮力を受けるように、製品と紙シート１とを配置しても良い。 As in the first embodiment, when the paper sheet 81 receives a compressive force in the thickness direction from the third sheet 8 to the first sheet 2, the uneven structure of the second sheet 3 collapses, and the space 4 is collapsed. The second sheet 3 has a shape that repeats irregularities, and can be deformed such that the convex portion falls down to the adjacent concave portion side. When no compressive force is applied in the thickness direction of the paper sheet 81, the first sheet 2 and the third sheet 8 are in contact only at the opening end of the second sheet 3, respectively. However, when receiving the compressive force, the first sheet 2 and the third sheet 8 come into contact with portions other than the open end of the second sheet 3. Thereby, the thermal conductivity and the electrical conductivity between the third sheet 8 and the second sheet 3 are higher, and the thermal conductivity and the electrical conductivity between the first sheet 2 and the second sheet 3 are higher. Become. Further, the paper sheet 81 is effective not only for preventing the product from being charged, but also for shielding electromagnetic waves generated from the product. The paper sheet 81 is formed so that the product and the paper sheet 1 are subjected to a compressive force in the thickness direction from the first sheet 2 to the third sheet 8 such that the surface of the product abuts on the first sheet 2. May be arranged.
　図６は、第２実施形態に係る放熱構造体の製造方法の概略フロー図を示す。図７は、図６の製造方法に用いる装置の一例を示す。 FIG. 6 is a schematic flowchart of a method for manufacturing a heat dissipation structure according to the second embodiment. FIG. 7 shows an example of an apparatus used in the manufacturing method of FIG.
　第２実施形態に係る紙シート８１の製造方法は、プレシートの挿入ステップ（Ｓ２００）、プレシートの成形ステップ（Ｓ２１０）、接着剤の塗布ステップ（Ｓ２２０）、第１シート２と第２シート３との接触ステップ（Ｓ２３０）、プレ紙シート１ａに対する接着剤の塗布ステップ（Ｓ２４０）、プレ紙シート１ａと第３シート８との接触ステップ（Ｓ２５０）の順に工程を行う方法である。当該製造方法に用いられる装置８０は、図４の装置３０の各構成要素に加え、シート送り部３４と第２歯車３２との間から搬送されてきたプレ紙シート１ａの下流方向に、接着剤塗布部３３と、接着剤塗布部３３と対向するバネ板８３と、を備える。また、装置８０は、接着剤塗布部３３とバネ板８３との間から搬送されてきたプレ紙シート１ａの下流方向に、紙シート送り部８４と、紙シート送り部８４と隙間を隔てて対向する熱盤８６と、を備える。また、装置８０は、シート送り部３４と第２歯車３２との間から搬送されてきたプレ紙シート１ａの下流方向に、第３シート送り部８８を備える。紙シート送り部８４は、第２シート３側の面に接着剤が塗布されたプレ紙シート１ａを加圧しながら搬送する手段である。紙シート送り部８４は、例えば、プレ紙シート１ａを点線矢印の方向に駆動するベルトを有するベルト搬送部であっても良い。また、紙シート送り部８４は、ローラによってプレ紙シート１ａを搬送する手段であっても良い。熱盤８６は、内部に高温蒸気が供給されて高温に保持された部材である。第３シート送り部８８は、第３シート８を紙シート送り部８４へ搬送する手段である。第３シート送り部８８は、好ましくは、ローラの形状を有しており、モータ等の駆動手段によって自転するか、若しくは歯車等の他の回転部材に従動する（第３シート送り部８８における実線矢印の方向に自転）。以下、各工程を、図７を参照しながら説明する。なお、プレ紙シート１ａを製造する装置３０の各構成要素および各ステップ（Ｓ２００～Ｓ２３０）は、第１実施形態と同様であるため、説明を省略する。 The method for manufacturing the paper sheet 81 according to the second embodiment includes a pre-sheet insertion step (S200), a pre-sheet molding step (S210), an adhesive application step (S220), and a step of forming the first sheet 2 and the second sheet 3 together. This is a method in which the steps are performed in the order of a contact step (S230), a step of applying an adhesive to the pre-paper sheet 1a (S240), and a step of contacting the pre-paper sheet 1a with the third sheet 8 (S250). The apparatus 80 used in the manufacturing method includes, in addition to the components of the apparatus 30 shown in FIG. 4, an adhesive agent in the downstream direction of the pre-paper sheet 1 a conveyed from between the sheet feeding unit 34 and the second gear 32. The device includes an application unit 33 and a spring plate 83 facing the adhesive application unit 33. In addition, the device 80 is disposed downstream of the pre-sheet sheet 1a conveyed from between the adhesive application section 33 and the spring plate 83, and faces the paper sheet feeding section 84 with the paper sheet feeding section 84 separated by a gap. And a heating plate 86. Further, the apparatus 80 includes a third sheet feeder 88 in the downstream direction of the pre-paper sheet 1a conveyed from between the sheet feeder 34 and the second gear 32. The paper sheet feeding unit 84 is a unit that conveys the pre-paper sheet 1a having the surface on the second sheet 3 side to which the adhesive is applied, while applying pressure. The paper sheet feeder 84 may be, for example, a belt transporter having a belt that drives the pre-paper sheet 1a in the direction of the dotted arrow. Further, the paper sheet feeding section 84 may be a unit that transports the pre-paper sheet 1a by a roller. The hot platen 86 is a member in which high-temperature steam is supplied and kept at a high temperature. The third sheet feeder 88 is means for conveying the third sheet 8 to the paper sheet feeder 84. The third sheet feeder 88 preferably has the shape of a roller, and is rotated by driving means such as a motor or driven by another rotating member such as a gear (solid line in the third sheet feeder 88). Rotation in the direction of the arrow). Hereinafter, each step will be described with reference to FIG. In addition, since each component and each step (S200 to S230) of the apparatus 30 for manufacturing the pre-paper sheet 1a are the same as those in the first embodiment, the description is omitted.
　プレ紙シート１ａに対する接着剤の塗布ステップ（Ｓ２４０）は、プレ紙シート１ａの第２シート３側の面を接着剤塗布部３３に接触させて、第２シート３側の面に接着剤を塗布するステップである。接着剤塗布部３３の構成は、第１実施形態と同様であるため、説明を省略する。また、装置８０は、接着剤塗布部３３に対向してバネ板８３を備える。バネ板８３は、接着剤塗布部３３に搬送されたプレ紙シート１ａを上から押さえつけるものである。プレ紙シート１ａは、バネ板８３により押さえつけられながら接着剤塗布部３３に接触することにより、第２シート３側の面に確実に接着剤を塗布することができる。なお、接着剤の塗布方法は、ローラの形状を有する部材の代わりに、接着剤を保持した平板、接着剤を蓄えた容器、あるいは接着剤を保持した刷毛を用いて塗布する方法を採用しても良い。 In the step of applying an adhesive to the pre-paper sheet 1a (S240), the surface of the pre-paper sheet 1a on the second sheet 3 side is brought into contact with the adhesive application section 33, and the adhesive is applied to the surface on the second sheet 3 side. It is a step to do. The configuration of the adhesive application section 33 is the same as that of the first embodiment, and a description thereof will be omitted. In addition, the device 80 includes a spring plate 83 facing the adhesive application section 33. The spring plate 83 presses the pre-paper sheet 1a conveyed to the adhesive application section 33 from above. The pre-paper sheet 1a can reliably apply the adhesive to the surface on the second sheet 3 side by contacting the adhesive application section 33 while being pressed by the spring plate 83. In addition, the method of applying the adhesive adopts a method of applying using a flat plate holding the adhesive, a container storing the adhesive, or a brush holding the adhesive, instead of the member having the shape of the roller. Is also good.
　プレ紙シート１ａと第３シート８との接触ステップ（Ｓ２５０）は、第３シート送り部８８から送られてきた第３シート８（矢印Ｃの方向に搬送）の片面に、接着剤が塗布されたプレ紙シート１ａの第２シート３側の面を接触させるステップである。接着剤が塗布されたプレ紙シート１ａ及び第３シート８は、紙シート送り部８４及び熱盤８６で加圧されながら加熱されることにより、互いに貼り合わされる。これにより、第２実施形態に係る紙シート８１が完成する。 In the contact step (S250) between the prepreg sheet 1a and the third sheet 8 (S250), an adhesive is applied to one surface of the third sheet 8 (conveyed in the direction of arrow C) sent from the third sheet feeding section 88. This is a step of contacting the surface of the prepreg sheet 1a on the second sheet 3 side. The pre-paper sheet 1a and the third sheet 8 to which the adhesive has been applied are bonded to each other by being heated while being pressed by the paper sheet feeding section 84 and the hot platen 86. Thereby, the paper sheet 81 according to the second embodiment is completed.
　なお、プレ紙シート１ａに対する接着剤の塗布ステップ（Ｓ２４０）に代えて、第３シート８に接着剤を塗布するステップとしても良い。かかる場合、プレ紙シート１ａと第３シート８との接触ステップ（Ｓ２５０）は、接着剤が塗布された第３シート８の片面に、プレ紙シート１ａの第２シート３側の面を接触させるステップとなる。 In addition, instead of the step of applying an adhesive to the pre-paper sheet 1a (S240), a step of applying an adhesive to the third sheet 8 may be performed. In such a case, in the contacting step (S250) between the pre-paper sheet 1a and the third sheet 8, the surface of the pre-paper sheet 1a on the second sheet 3 side is brought into contact with one side of the third sheet 8 to which the adhesive is applied. Become a step.
（各実施形態の作用・効果）
　以上説明したように、紙シート１，８１は、製品からの放熱および製品の帯電防止を可能とする紙シートであって、第１シート２と、第１シート２の一面に固定され、所定方向に向かって連続した凹凸を繰り返す形状を有する第２シート３と、を備える。また、第１シート２および第２シート３のうち少なくとも一方は、炭素系フィラーを含有するシートである。また、第２シート３は、第１シート２と凹凸との間に空間４が形成されるように設けられる。 (Operations and effects of each embodiment)
As described above, the paper sheets 1 and 81 are paper sheets that can release heat from the product and prevent the product from being charged. And a second sheet 3 having a shape that repeats continuous irregularities toward. At least one of the first sheet 2 and the second sheet 3 is a sheet containing a carbon-based filler. The second sheet 3 is provided so that a space 4 is formed between the first sheet 2 and the unevenness.
　このため、例えば、製品の表面が第２シート３に当接するなどして、第２シート３から第１シート２に至る厚さ方向に圧縮力を受けることにより、第２シート３が空間４を倒し、若しくは空間４を潰す形態で第１シート２に接触するため、製品の表面の凹凸に依存しにくく、高い放熱効率を得ることができる。また、第１シート２と第２シート３との間の導電性も高くなる。よって、紙シート１，８１は、柔らかく、防傷性に優れ、放熱あるいは帯電防止の対象となる製品への密着性が高くなる。また、紙シート１，８１は、製品の帯電防止や製品から発生される電磁波の遮蔽にも有効である。また、従来のような金属製の放熱フィン等に比べて、紙シート１，８１の軽量化を図ることができる。 For this reason, for example, when the surface of the product comes into contact with the second sheet 3 and receives a compressive force in the thickness direction from the second sheet 3 to the first sheet 2, the second sheet 3 occupies the space 4. Since the first sheet 2 is brought into contact with the first sheet 2 in the form of being laid down or the space 4 being crushed, it is difficult to depend on the unevenness of the surface of the product, and high heat radiation efficiency can be obtained. Further, the conductivity between the first sheet 2 and the second sheet 3 also increases. Therefore, the paper sheets 1 and 81 are soft, have excellent scratch resistance, and have high adhesion to a product to be radiated or prevented from being charged. Further, the paper sheets 1 and 81 are also effective for preventing static electricity of the product and shielding electromagnetic waves generated from the product. Further, the weight of the paper sheets 1 and 81 can be reduced as compared with a conventional metal radiation fin or the like.
　なお、紙シート１，８１は、高い放熱性および電磁波遮蔽性を有するため、放熱、帯電防止、および、外部に対する電磁波遮蔽を要する製品に対して用いられることが好ましいが、これに限定されない。例えば、帯電防止性や外部に対する電磁波遮蔽性は必要とせず、放熱のみを要する製品に対して紙シート１，８１を用いても良い。また、放熱を必要とせず、上述の帯電防止性や電磁波遮蔽性を要する製品に対して紙シート１，８１を用いても良い。 Note that since the paper sheets 1 and 81 have high heat radiation and electromagnetic wave shielding properties, they are preferably used for products that require heat radiation, antistatic, and electromagnetic wave shielding to the outside, but are not limited thereto. For example, the paper sheets 1 and 81 may be used for products that do not need antistatic properties or electromagnetic wave shielding properties for the outside and only require heat radiation. Further, the paper sheets 1 and 81 may be used for products that do not require heat radiation and require the above-described antistatic property and electromagnetic wave shielding property.
　また、紙シート８１は、第２シート３のうち第１シート２と反対側の面に固定される第３シート８を備えることにより、製品の表面の凹凸に依存しにくく、放熱あるいは帯電防止の対象となる製品への密着性が高くなる。また、紙シート８１は、高い放熱性、帯電防止性、および、外部に対する電磁波遮蔽性を発揮することができる。 Further, the paper sheet 81 is provided with the third sheet 8 fixed to the surface of the second sheet 3 on the side opposite to the first sheet 2, so that the paper sheet 81 is less dependent on the unevenness of the surface of the product, and has a heat radiation or antistatic property. Adhesion to the target product increases. Further, the paper sheet 81 can exhibit high heat dissipation, antistatic properties, and electromagnetic shielding properties against the outside.
　また、第３シート８は炭素系フィラーを含有するシートであるため、第３シート８と第２シート３との間の熱伝導性および導電性がより高くなる。 た め Further, since the third sheet 8 is a sheet containing a carbon-based filler, the thermal conductivity and the electrical conductivity between the third sheet 8 and the second sheet 3 are further increased.
　また、空間４が一方向に長い形状であって、両端開放型の筒あるいは一端開放型のカップの形態を有することにより、空間４の変形容易性が高められ、製品の表面の凹凸にさらに依存しにくくなり、熱伝導性および導電性がより高くなる。また、紙シート１，８１は空間４に起因してより軽量となる。 Further, since the space 4 has a shape that is long in one direction and has a form of an open-ended cylinder or an open-ended cup, the deformability of the space 4 is enhanced, and the space 4 is further dependent on unevenness on the surface of the product. And the thermal and electrical conductivity is higher. Further, the paper sheets 1 and 81 become lighter due to the space 4.
（その他の実施形態）
　上述のように、本発明の好適な各実施形態について説明したが、本発明は、これらに限定されることなく、種々変形して実施可能である。 (Other embodiments)
As described above, the preferred embodiments of the present invention have been described. However, the present invention is not limited thereto, and can be implemented with various modifications.
　上述の実施形態では、第１シート２および第２シート３は、共に炭素系フィラーを含有するシートであったが、これに限定されず、第１シート２または第２シート３のいずれか一方が、炭素系フィラーを含有するシートであっても良い。この場合、炭素系フィラーを含有しないシートの製造方法は、混合パルプの製造ステップ（Ｓ１１０；図２参照）を省略する点を除き、図２に示すシートの製造方法と同様である。具体的には、炭素系フィラーを含有しないシートは、木材パルプの製造ステップ（Ｓ１００）で製造された木材パルプを溶媒に分散させたパルプスラリーを用いて、製紙ステップ（Ｓ１２０）により製造される。 In the above-described embodiment, the first sheet 2 and the second sheet 3 are both sheets containing a carbon-based filler. However, the present invention is not limited to this, and one of the first sheet 2 and the second sheet 3 may be used. Alternatively, a sheet containing a carbon-based filler may be used. In this case, the method for producing the sheet containing no carbon-based filler is the same as the method for producing the sheet shown in FIG. 2 except that the step of producing the mixed pulp (S110; see FIG. 2) is omitted. Specifically, the sheet containing no carbon-based filler is manufactured in a papermaking step (S120) using a pulp slurry in which the wood pulp manufactured in the wood pulp manufacturing step (S100) is dispersed in a solvent.
　例えば、第１実施形態の紙シート１が、第１シート２が炭素系フィラーを含有しないシートであって、第２シート３が炭素系フィラーを含有するシートである場合は、製品の表面が第２シート３に当接するなどして、第２シート３から第１シート２に至る厚さ方向に圧縮力を受けるように、製品と紙シート１とを配置するのが好ましい。この場合、紙シート１は、より高い放熱正を発揮することができる。ただし、帯電防止および電磁波遮蔽の観点からは、製品の表面が第１シート２または第２シート３の何れのシートに当接していても良い。 For example, when the paper sheet 1 of the first embodiment is a sheet in which the first sheet 2 does not contain a carbon-based filler and the second sheet 3 is a sheet containing a carbon-based filler, the surface of the product may It is preferable to arrange the product and the paper sheet 1 so as to receive a compressive force in the thickness direction from the second sheet 3 to the first sheet 2 by, for example, contacting the two sheets 3. In this case, the paper sheet 1 can exhibit higher heat dissipation. However, the surface of the product may be in contact with any one of the first sheet 2 and the second sheet 3 from the viewpoint of antistatic and electromagnetic wave shielding.
　また、例えば、第１実施形態の紙シート１が、第１シート２が炭素系フィラーを含有するシートであって、第２シート３が炭素系フィラーを含有しないシートである場合は、製品の表面が第１シート２に当接するなどして、第１シート２から第２シート３に至る厚さ方向に圧縮力を受けるように、製品と紙シート１とを配置するのが好ましい。この場合、紙シート１は、より高い放熱性を発揮することができる。ただし、帯電防止および電磁波遮蔽の観点からは、製品の表面が第１シート２または第２シート３の何れのシートに当接していても良い。 Further, for example, when the paper sheet 1 of the first embodiment is a sheet in which the first sheet 2 is a sheet containing a carbon-based filler and the second sheet 3 is a sheet not containing a carbon-based filler, It is preferable to arrange the product and the paper sheet 1 such that the product and the paper sheet 1 receive a compressive force in the thickness direction from the first sheet 2 to the second sheet 3 by, for example, contacting the first sheet 2. In this case, the paper sheet 1 can exhibit higher heat dissipation. However, the surface of the product may be in contact with any one of the first sheet 2 and the second sheet 3 from the viewpoint of antistatic and electromagnetic wave shielding.
　また、第２実施形態では、第３シート８は、炭素系フィラーを含有するシートであったが、これに限定されず、炭素系フィラーを含有しないシートであっても良い。この場合、例えば、第１シート２および第２シート２が炭素系フィラーを含有するシートである場合には、製品の表面が第１シート２に当接するなどして、第１シート２から第３シート８に至る厚さ方向に圧縮力を受けるように、製品と紙シート８１とを配置するのが好ましい。この場合、紙シート８１は、より高い放熱性を発揮することができる。ただし、帯電防止および電磁波遮蔽の観点からは、製品の表面が第１シート２または第３シート８の何れのシートに当接していても良い。 Also, in the second embodiment, the third sheet 8 is a sheet containing a carbon-based filler, but is not limited thereto, and may be a sheet containing no carbon-based filler. In this case, for example, when the first sheet 2 and the second sheet 2 are sheets containing a carbon-based filler, the surface of the product abuts on the first sheet 2 and the like, so that the first sheet 2 and the third sheet 2 It is preferable to arrange the product and the paper sheet 81 so as to receive a compressive force in the thickness direction reaching the sheet 8. In this case, the paper sheet 81 can exhibit higher heat dissipation. However, from the viewpoints of antistatic and electromagnetic wave shielding, the surface of the product may be in contact with any one of the first sheet 2 and the third sheet 8.
　また、例えば、第２実施形態の紙シート８１は、第１シート２が炭素系フィラーを含有するシートであって、第２シート３および第３シート８が炭素系フィラーを含有しないシートで構成されていても良い。この場合、製品の表面が第１シート２に当接するなどして、第１シート２から第３シート８に至る厚さ方向に圧縮力を受けるように、製品と紙シート８１とを配置するのが好ましい。この場合、紙シート８１は、より高い放熱性を発揮することができる。ただし、帯電防止および電磁波遮蔽の観点からは、製品の表面が第１シート２または第３シート８の何れのシートに当接していても良い。 Further, for example, in the paper sheet 81 of the second embodiment, the first sheet 2 is a sheet containing a carbon-based filler, and the second sheet 3 and the third sheet 8 are sheets containing no carbon-based filler. May be. In this case, the product and the paper sheet 81 are arranged such that the surface of the product comes into contact with the first sheet 2 and receives a compressive force in the thickness direction from the first sheet 2 to the third sheet 8. Is preferred. In this case, the paper sheet 81 can exhibit higher heat dissipation. However, from the viewpoints of antistatic and electromagnetic wave shielding, the surface of the product may be in contact with any one of the first sheet 2 and the third sheet 8.
　また、例えば、第２実施形態の紙シート８１は、第２シート３が炭素系フィラーを含有するシートであって、第１シート２および第３シート８が炭素系フィラーを含有しないシートで構成されていても良い。 For example, in the paper sheet 81 of the second embodiment, the second sheet 3 is a sheet containing a carbon-based filler, and the first sheet 2 and the third sheet 8 are sheets containing no carbon-based filler. May be.
　また、例えば、第２実施形態の紙シート８１は、第２シート３および第３シート８が炭素系フィラーを含有するシートであって、第１シート２が炭素系フィラーを含有しないシートで構成されていても良い。この場合、製品の表面が第３シート８に当接するなどして、第３シート８から第１シート２に至る厚さ方向に圧縮力を受けるように、製品と紙シート８１とを配置するのが好ましい。この場合、紙シート８１は、より高い放熱性を発揮することができる。ただし、帯電防止および電磁波遮蔽の観点からは、製品の表面が第１シート２または第３シート８の何れのシートに当接していても良い。 Further, for example, the paper sheet 81 of the second embodiment is configured such that the second sheet 3 and the third sheet 8 are sheets containing a carbon-based filler, and the first sheet 2 is a sheet containing no carbon-based filler. May be. In this case, the product and the paper sheet 81 are arranged such that the surface of the product comes into contact with the third sheet 8 and receives a compressive force in the thickness direction from the third sheet 8 to the first sheet 2. Is preferred. In this case, the paper sheet 81 can exhibit higher heat dissipation. However, from the viewpoints of antistatic and electromagnetic wave shielding, the surface of the product may be in contact with any one of the first sheet 2 and the third sheet 8.
　また、例えば、第２実施形態の紙シート８１は、第１シート２および第３シート８が炭素系フィラーを含有するシートであって、第２シート３が炭素系フィラーを含有しないシートで構成されていても良い。この場合、製品の表面が第１シート２または第３シート８の何れのシートに当接していても、高い放熱性、帯電防止性、および、電磁波遮蔽性を得ることができる。 Further, for example, in the paper sheet 81 of the second embodiment, the first sheet 2 and the third sheet 8 are sheets containing a carbon-based filler, and the second sheet 3 is a sheet containing no carbon-based filler. May be. In this case, even if the surface of the product is in contact with any one of the first sheet 2 and the third sheet 8, it is possible to obtain high heat dissipation, antistatic properties, and electromagnetic wave shielding properties.
　また、紙シートは、第１実施形態の紙シート１を厚さ方向に２つ重ねて構成されていても良い。すなわち、紙シートは、厚さ方向において、第１シート２、第２シート３、第１シート２、第２シート３の順に重ねて構成される。また、紙シートは、第１実施形態の紙シート１を厚さ方向に３つ以上重ねて構成されていても良い。また、紙シートは、第１実施形態の紙シート１と第２実施形態の紙シート８１とを重ねて構成されていても良い。この場合、紙シートは、紙シート１の第２シート３と、紙シート８１の第１シート２または第３シート８とを接触させて構成される。このような構成により、使用目的に合わせて紙シートの厚さを自由に設計可能となる。 The paper sheet may be configured by stacking two paper sheets 1 of the first embodiment in the thickness direction. That is, the paper sheet is configured by stacking the first sheet 2, the second sheet 3, the first sheet 2, and the second sheet 3 in this order in the thickness direction. Further, the paper sheet may be configured by stacking three or more paper sheets 1 of the first embodiment in the thickness direction. Further, the paper sheet may be configured by stacking the paper sheet 1 of the first embodiment and the paper sheet 81 of the second embodiment. In this case, the paper sheet is configured by bringing the second sheet 3 of the paper sheet 1 into contact with the first sheet 2 or the third sheet 8 of the paper sheet 81. With such a configuration, the thickness of the paper sheet can be freely designed according to the purpose of use.
　第２実施形態に係る紙シート８１は、図６の製造方法に限定されず、例えば、接着剤の塗布ステップ（Ｓ２２０）は、歯形に成形された第２シート３の両面に接着剤を塗布するステップとしてもよい。かかる場合、以降の各ステップ（Ｓ２３０～Ｓ２５０）に代えて、両面に接着剤が塗布された第２シート３の一方の面に第１シート２の片面を接触させ、第２シート３の他方の面に第３シート８の片面を接触させても良い。また、第１シート２と第２シート３、あるいは第２シート３と第３シート８とは、接着剤に限らず、粘着剤や両面テープで貼り合わせてもよい。紙シート１，８１に放熱フィンや基板を密着させる場合、その密着性を上げるために、第１シート２、第２シート３または第３シート８の全面または一部に、粘着剤やグリースなどを塗布することも任意である。また、前述の木材パルプ以外に、耐熱性や難燃性を目的に、アラミド繊維やガラス繊維、その他樹脂などを混合することも任意である。また、図中の各種歯車の形状、それによって加工される凹凸形状については、本願に図示される形態に限定されるものではない。 The paper sheet 81 according to the second embodiment is not limited to the manufacturing method of FIG. 6. For example, in the adhesive application step (S220), the adhesive is applied to both surfaces of the second sheet 3 formed into a tooth shape. It may be a step. In such a case, instead of the subsequent steps (S230 to S250), one side of the first sheet 2 is brought into contact with one side of the second sheet 3 having both sides coated with an adhesive, and the other side of the second sheet 3 One surface of the third sheet 8 may be brought into contact with the surface. Further, the first sheet 2 and the second sheet 3 or the second sheet 3 and the third sheet 8 are not limited to the adhesive, but may be bonded with an adhesive or a double-sided tape. When the radiation fins and the substrate are brought into close contact with the paper sheets 1 and 81, an adhesive or grease is applied to the entire surface or a part of the first sheet 2, the second sheet 3 or the third sheet 8 in order to increase the adhesion. The application is optional. In addition to the above-mentioned wood pulp, it is optional to mix aramid fiber, glass fiber, other resin, and the like for the purpose of heat resistance and flame retardancy. In addition, the shapes of the various gears in the drawings and the irregularities processed thereby are not limited to the forms illustrated in the present application.
　また、上述の各実施形態の複数の構成要素は、互いに組み合わせ不可能な場合を除いて、自由に組み合わせ可能である。 複数 In addition, a plurality of components of each of the above-described embodiments can be freely combined except in a case where they cannot be combined with each other.
　本発明に係る紙シートは、例えば、自動車用バッテリー、自動車、工業用ロボット、発電装置、ＰＣ、家庭用電化製品などの各種電子機器に接触する、あるいは、これらを覆う資材等に利用することができる。 The paper sheet according to the present invention can be used, for example, as a material for contacting or covering various electronic devices such as a battery for an automobile, an automobile, an industrial robot, a power generator, a PC, and household appliances. it can.

Claims (8)

  1. 　製品からの放熱、製品の帯電防止、および製品からの電磁波若しくは外部から製品への電磁波の遮蔽を可能とする紙シートであって、
    　第１シートと、
    　前記第１シートの一面に固定され、所定方向に向かって連続した凹凸を繰り返す形状を有する第２シートと、
    を備え、
    　前記第１シートおよび前記第２シートのうち少なくとも一方は、炭素系フィラーを含有するシートであり、
    　前記第２シートは、前記第１シートと前記凹凸との間に空間が形成されるように設けられることを特徴とする紙シート。     A paper sheet that enables heat radiation from the product, antistatic of the product, and shielding of electromagnetic waves from the product or electromagnetic waves from the outside to the product,
    A first sheet,
    A second sheet fixed to one surface of the first sheet and having a shape that repeats continuous irregularities in a predetermined direction;
    With
    At least one of the first sheet and the second sheet is a sheet containing a carbon-based filler,
    The paper sheet, wherein the second sheet is provided so that a space is formed between the first sheet and the irregularities.
  2. 　前記第２シートのうち前記第１シートと反対側の面に固定される第３シートを備えることを特徴とする請求項１に記載の紙シート。 The paper sheet according to claim 1, further comprising a third sheet fixed to a surface of the second sheet opposite to the first sheet.
  3. 　前記第３シートは、炭素系フィラーを含有するシートであることを特徴とする請求項２に記載の紙シート。 The paper sheet according to claim 2, wherein the third sheet is a sheet containing a carbon-based filler.
  4. 　前記空間は、一方向に長い形状であって、両端開放型の筒あるいは一端開放型のカップの形態を有する請求項１から３のいずれか１項に記載の紙シート。 The paper sheet according to any one of claims 1 to 3, wherein the space has a shape that is long in one direction, and has a form of a cylinder open at both ends or a cup open at one end.
  5. 　前記炭素系フィラーを含有するシートは、当該シートに対して前記炭素系フィラーを３０質量％以上含有することを特徴とする請求項１から４のいずれか１項に記載の紙シート。 The paper sheet according to any one of claims 1 to 4, wherein the sheet containing the carbon-based filler contains the carbon-based filler in an amount of 30% by mass or more based on the sheet.
  6. 　回転可能な第１歯車と、
    　前記第１歯車と噛み合って回転する第２歯車と、
    　前記第１歯車と前記第２歯車との接触位置より前記第２歯車の回転方向下流側に位置する接着剤塗布部と、
    　前記接着剤塗布部より前記第２歯車の回転方向下流側に位置するシート送り部と、
    を備える装置を用いて請求項１から５のいずれか１項に記載の紙シートを製造する方法であって、
    　前記第２シートを成形する前のプレシートを、前記接触位置に対して前記接着剤塗布部の反対側から前記接触位置に挿入する挿入ステップと、
    　前記プレシートを前記第２歯車の歯形に成形しながら前記第２歯車の進行方向に送る成形ステップと、
    　前記歯形に成形された部分を前記接着剤塗布部に接触させて、前記第２シートの成形部分に接着剤を塗布する塗布ステップと、
    　前記シート送り部から送られてきた第１シートの片面に、前記プレシートを成形した前記第２シートの前記接着剤を塗布した部分を接触させる接触ステップと、
    を含む紙シートの製造方法。     A rotatable first gear;
    A second gear that rotates while meshing with the first gear;
    An adhesive application unit located downstream of the contact position between the first gear and the second gear in the rotation direction of the second gear;
    A sheet feeder located downstream of the adhesive application unit in the rotation direction of the second gear;
    A method for producing the paper sheet according to any one of claims 1 to 5, using an apparatus including:
    Inserting a pre-sheet before forming the second sheet into the contact position from the opposite side of the adhesive application portion with respect to the contact position,
    A forming step of feeding the pre-sheet in the traveling direction of the second gear while forming the pre-sheet into a tooth profile of the second gear;
    An application step of bringing the tooth-shaped part into contact with the adhesive application part and applying an adhesive to the molded part of the second sheet;
    A contacting step of contacting, on one side of the first sheet sent from the sheet feeding section, a portion of the second sheet formed with the pre-sheet to which the adhesive has been applied;
    A method for producing a paper sheet comprising:
  7. 　回転可能な第１歯車と、
    　前記第１歯車と噛み合って回転する第２歯車と、
    　前記第１歯車と前記第２歯車との接触位置より前記第２歯車の回転方向下流側に位置する接着剤塗布部と、
    　前記接着剤塗布部より前記第２歯車の回転方向下流側に位置するシート送り部と、
    を備える装置を用いて請求項１から５のいずれか１項に記載の紙シートを製造する方法であって、
    　前記第２シートを成形する前のプレシートを、前記接触位置に対して前記接着剤塗布部の反対側から前記接触位置に挿入する挿入ステップと、
    　前記プレシートを前記第２歯車の歯形に成形しながら前記第２歯車の進行方向に送る成形ステップと、
    　前記第１シートの片面を前記接着剤塗布部に接触させて接着剤を塗布する塗布ステップと、
    　前記シート送り部から送られてきた第１シートの片面に、前記プレシートを成形した前記第２シートを接触させる接触ステップと、
    を含む紙シートの製造方法。     A rotatable first gear;
    A second gear that rotates while meshing with the first gear;
    An adhesive application unit located downstream of the contact position between the first gear and the second gear in the rotation direction of the second gear;
    A sheet feeder located downstream of the adhesive application unit in the rotation direction of the second gear;
    A method for producing the paper sheet according to any one of claims 1 to 5, using an apparatus including:
    Inserting a pre-sheet before forming the second sheet into the contact position from the opposite side of the adhesive application portion with respect to the contact position,
    A forming step of feeding the pre-sheet in the traveling direction of the second gear while forming the pre-sheet into a tooth profile of the second gear;
    An application step of applying an adhesive by bringing one side of the first sheet into contact with the adhesive application section;
    A contacting step of bringing the second sheet formed with the pre-sheet into contact with one surface of the first sheet sent from the sheet feeding unit;
    A method for producing a paper sheet comprising:
  8. 　木材片および／または古紙をパルプ化して木材パルプ繊維を製造する製造ステップと、
    　炭素系フィラーと前記木材パルプとを混合して混合パルプを製造する混合ステップと、
    　前記混合パルプを製紙する製紙ステップと、
    を前記挿入ステップに先立って含み、
    　前記第１シートおよび前記プレシートのうち少なくとも一方は、前記混合パルプを製紙して製造されたシートであることを特徴とする請求項６または７に記載の紙シートの製造方法。
     

          A manufacturing step of pulping wood pieces and / or waste paper to produce wood pulp fibers;
    Mixing a carbon-based filler and the wood pulp to produce a mixed pulp,
    A papermaking step of papermaking the mixed pulp,
    Prior to said inserting step,
    The method according to claim 6, wherein at least one of the first sheet and the pre-sheet is a sheet manufactured by paper-making the mixed pulp.


PCT/JP2019/026490 2018-07-24 2019-07-03 Paper sheet and method for manufacturing paper sheet WO2020022013A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114649280A (en) * 2022-05-18 2022-06-21 中国人民解放军海军工程大学 Micro-channel radiator with gill bionic structure

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999029503A1 (en) * 1997-12-08 1999-06-17 Vermillion Robert J Protective fiberboard to protect electrostatic sensitive devices from static electricity
JP2004253760A (en) * 2002-12-25 2004-09-09 Toray Ind Inc Sheet material for wave absorber, and wave absorber
WO2010113303A1 (en) * 2009-04-01 2010-10-07 特種製紙株式会社 Electromagnetic wave absorption structure
WO2011025020A1 (en) * 2009-08-31 2011-03-03 阿波製紙株式会社 Paper sheet radiator
CN102154900A (en) * 2011-01-19 2011-08-17 安徽虹光企业投资集团有限公司 Preparation method of anti-static carbon fibre corrugated paper

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999029503A1 (en) * 1997-12-08 1999-06-17 Vermillion Robert J Protective fiberboard to protect electrostatic sensitive devices from static electricity
JP2004253760A (en) * 2002-12-25 2004-09-09 Toray Ind Inc Sheet material for wave absorber, and wave absorber
WO2010113303A1 (en) * 2009-04-01 2010-10-07 特種製紙株式会社 Electromagnetic wave absorption structure
WO2011025020A1 (en) * 2009-08-31 2011-03-03 阿波製紙株式会社 Paper sheet radiator
CN102154900A (en) * 2011-01-19 2011-08-17 安徽虹光企业投资集团有限公司 Preparation method of anti-static carbon fibre corrugated paper

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114649280A (en) * 2022-05-18 2022-06-21 中国人民解放军海军工程大学 Micro-channel radiator with gill bionic structure
CN114649280B (en) * 2022-05-18 2022-07-29 中国人民解放军海军工程大学 Micro-channel radiator with gill bionic structure

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