WO2020189375A1 - Feuille, et procédé de fabrication de celle-ci - Google Patents

Feuille, et procédé de fabrication de celle-ci Download PDF

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Publication number
WO2020189375A1
WO2020189375A1 PCT/JP2020/010029 JP2020010029W WO2020189375A1 WO 2020189375 A1 WO2020189375 A1 WO 2020189375A1 JP 2020010029 W JP2020010029 W JP 2020010029W WO 2020189375 A1 WO2020189375 A1 WO 2020189375A1
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WO
WIPO (PCT)
Prior art keywords
fiber
sheet
fibers
present
coating layer
Prior art date
Application number
PCT/JP2020/010029
Other languages
English (en)
Japanese (ja)
Inventor
大輔 岩間
哲也 青野
Original Assignee
特種東海製紙株式会社
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 特種東海製紙株式会社 filed Critical 特種東海製紙株式会社
Priority to JP2021507221A priority Critical patent/JPWO2020189375A1/ja
Publication of WO2020189375A1 publication Critical patent/WO2020189375A1/fr

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Classifications

    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/355—Security threads
    • 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
    • D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
    • D21H13/10—Organic non-cellulose fibres
    • 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/28—Colorants ; Pigments or opacifying agents
    • 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/30—Luminescent or fluorescent substances, e.g. for optical bleaching
    • 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper

Definitions

  • the present invention relates to, for example, a sheet that can be suitably used for anti-counterfeiting or decorative purposes and its manufacture.
  • Patent Document 1 proposes to make a fine magnetic metal fiber or a metal thread made of the magnetic metal fiber instead of the conventional non-metal thread, but for large-scale production, it is proposed. , It is necessary to change the paper making process itself in order to uniformly disperse the metal fibers having a large specific gravity in the slurry for paper making or to make the metal thread, and it is necessary to make a major modification of the manufacturing process.
  • decorative paper that has been given a decorative effect by performing shaping treatment in the papermaking process to provide an uneven pattern on the paper surface is also widely used.
  • Patent Document 2 proposes a decorative paper in which an adhesive layer is formed on the surface of a paper and flocs are hair-planted and fixed on the adhesive layer.
  • the flocs are upright and bonded by electrostatic hair-planting. It needs to be fixed on the agent layer, which also requires major modifications of the manufacturing equipment for large-scale production.
  • the present invention can be produced by a relatively simple method, and the presence of fibers can be visually confirmed, and is suitable for, for example, anti-counterfeiting or decorative applications.
  • the challenge is to provide a usable sheet.
  • the present inventors use fibers having a specific fiber length and a specific fiber width, and arrange the fibers in a specific form on the sheet base material instead of in the sheet base material. Then, he found that such a sheet could be provided, and completed the present invention.
  • the first aspect of the present invention is Sheet base material and A sheet comprising at least one type of fiber having a fiber length of 0.5 mm to 4.0 mm and a fiber width of 10 ⁇ m to 350 ⁇ m. Whether the side surface of the fiber is in contact with the surface of the sheet substrate Or A coating layer is present on the surface of the sheet substrate.
  • the coating layer contains the fibers. It is a sheet.
  • the aspect ratio of the fiber is preferably 1.4 to 400.
  • the fibers are preferably colored fibers and / or fluorescent fibers.
  • the fiber is preferably a synthetic fiber.
  • the synthetic fiber is preferably selected from the group consisting of polyester fiber, polyvinyl alcohol fiber, polyamide fiber, poly (meth) acrylic fiber, regenerated cellulose fiber, and a mixture thereof.
  • the side surface of the fiber may be in contact with the surface of the sheet base material via at least one kind of binder.
  • a coating layer is present on the surface of the sheet base material.
  • the coating layer may further contain at least one binder in addition to the fibers.
  • the binder is preferably made of a synthetic resin.
  • the coating layer may further contain at least one filler.
  • the coating layer When a coating layer is present on the surface of the sheet base material and the coating layer contains fibers, at least a part of the fibers may be covered with the coating layer.
  • the sheet base material may be a resin film.
  • the sheet base material may be paper, in which case The fibers are different from the fibers that make up the paper.
  • the sheet of the present invention may be used for anti-counterfeiting or decorative purposes.
  • a second aspect of the present invention is a coating composition for a sheet substrate. It is a composition containing at least one kind of fiber having a fiber length of 0.5 mm to 4.0 mm and a fiber width of 10 ⁇ m to 350 ⁇ m.
  • the composition may further contain at least one binder.
  • a third aspect of the present invention is a method for producing a sheet, which comprises a step of coating the above composition on a sheet substrate.
  • a step of coating the above composition on a sheet substrate In the sheet Whether the side surface of the fiber is in contact with the surface of the sheet substrate Or A coating layer is present on the surface of the sheet substrate.
  • the coating layer contains the fibers.
  • the sheet of the present invention uses fibers having a specific fiber length and a specific fiber width, and the fibers are arranged in a specific form on the sheet base material instead of in the sheet base material, the application ( It can be manufactured by a relatively simple method such as coating).
  • the presence of fibers on the sheet base material can be visually confirmed.
  • fibers or fluorescent fibers are used as the fibers, it is difficult to confirm from the outside of the sheet if they are present in the sheet base material, but in the sheet of the present invention, these are on the surface of the sheet base material. Since they are present, these fibers can be easily visually confirmed from the outside.
  • the distribution of fibers on the sheet base material can be easily made uniform.
  • the sheet base material has a predetermined shape such as a resin film, it is difficult to introduce the fiber into the sheet base material, but such introduction is not necessary in the present invention.
  • the sheet of the present invention can be used for various purposes, for example, it can be suitably used for anti-counterfeiting or decorative purposes.
  • composition of the present invention can be used for producing the sheet of the present invention, and for example, the sheet of the present invention can be produced by a relatively simple method of applying the composition of the present invention on a sheet substrate. ..
  • the manufacturing method of the present invention can relatively easily manufacture the sheet of the present invention.
  • the production method of the present invention can produce a sheet in which the distribution of fibers on the sheet base material is uniform and there are no defects due to the non-uniform distribution of fibers.
  • the first aspect of the present invention is Sheet base material and A sheet comprising at least one type of fiber having a fiber length of 0.5 mm to 4.0 mm and a fiber width of 10 ⁇ m to 350 ⁇ m. Whether the side surface of the fiber is in contact with the surface of the sheet substrate Or A coating layer is present on the surface of the sheet substrate.
  • the coating layer contains the fibers. It is a sheet.
  • the sheet base material used in the sheet of the present invention is not particularly limited as long as it is in the form of a sheet.
  • the sheet base material examples include a porous sheet base material such as paper, a porous film, a woven fabric, a dry non-woven fabric, a wet non-woven fabric, and a knitted fabric, and a non-porous sheet base material such as a film and a plate-like material. These base materials may be used alone or may be laminated and composited by laminating or the like.
  • fibers constituting paper, woven fabric, dry non-woven fabric, wet non-woven fabric, and knitted fabric include olefin resin, polyester resin, polyvinyl acetate resin, ethylene vinyl acetate copolymer resin, polyamide resin, acrylic resin, and polychloride.
  • plant fibers such as wood pulp, sardine, sardine, straw, kenaf, bamboo, linter, bagasse, esparto, and sugar cane, particularly cellulose fiber, or finely divided ones can be used.
  • rayon fiber which is a cellulose regenerated fiber, semi-synthetic fiber such as acetate can also be used.
  • Examples of the resin constituting the film, porous film, and plate-like material include olefin resin, polyester resin, polyvinyl acetate resin, ethylene vinyl acetate copolymer resin, polyamide resin, acrylic resin, and polyvinyl chloride resin. , Polyvinylidene chloride resin, polyvinyl ether resin, polyvinyl ketone resin, polyether resin, polyvinyl alcohol resin, diene resin, polyurethane resin, polycarbonate resin, cellulose resin, polyimide resin, phenol resin, melamine resin, furan resin , Urea resin, aniline resin, unsaturated polyester resin, alkyd resin, polyimide resin, fluororesin, silicone resin and the like can be used.
  • an inorganic porous film such as a punching metal sheet, a foamed metal sheet, or an aggregate film of inorganic particles can also be used.
  • a metal foil or a metal plate may be used as the film or plate-like material.
  • a resin film is preferable as the non-porous sheet base material.
  • Paper is preferable as the porous sheet base material.
  • the fibers constituting the paper are different from the fibers described later.
  • the thickness of the sheet is not particularly limited, but can be, for example, 0.01 to 10 mm, preferably 0.03 to 1 mm, and more preferably 0.05 to 0.1 mm.
  • the fibers used in the sheet of the present invention have a fiber length in the range of 0.5 mm to 4.0 mm and a fiber width of 10 ⁇ m to 350 ⁇ m.
  • the fibers used in the present invention can be visually confirmed.
  • the fiber length is the average fiber length and means the number average fiber length.
  • the number average fiber length is obtained by magnifying and observing the fibers with an optical microscope or an electron microscope, randomly selecting a predetermined number of fibers from the optical microscope or an electron microscope image, and measuring and averaging the lengths of the selected fibers.
  • Can be obtained by The number of fibers to be selected is 10 or more, preferably 50 or more, and more preferably 100 or more.
  • the fiber length may be 0.8 mm to 3.7 mm, 1.1 mm to 3.4 mm, or 1.4 mm to 3.1 mm.
  • the fiber width is the average fiber width, which means the number average fiber width.
  • the number average fiber width is obtained by magnifying and observing the fibers with an optical microscope or an electron microscope, randomly selecting a predetermined number of fibers from the optical microscope or an electron microscope image, and measuring and averaging the widths of the selected fibers.
  • Can be obtained by The number of fibers to be selected is 10 or more, preferably 50 or more, and more preferably 100 or more.
  • the fiber width means the fiber diameter.
  • the fiber width means the projected diameter.
  • the fiber width is set to 10 ⁇ m or more. If the fiber width exceeds 350 ⁇ m, the fibers are not coated on the coating layer and the possibility of falling off from the sheet base material increases. Therefore, the fiber width is set to 350 ⁇ m or less. Therefore, the fiber width is 10 ⁇ m to 350 ⁇ m, preferably 10 ⁇ m to 300 ⁇ m, more preferably 10 ⁇ m to 200 ⁇ m, and even more preferably 10 ⁇ m to 100 ⁇ m. In particular, the fiber width may be 10 ⁇ m to 40 ⁇ m, 10 ⁇ m to 30 ⁇ m, or 10 ⁇ m to 20 ⁇ m.
  • the aspect ratio of the fiber is preferably 1.4 or more, preferably 400 or less.
  • the type of fiber used in the sheet of the present invention is not limited, and one or more fibers may be used.
  • the material of the fiber can be an inorganic fiber, an organic fiber, or a composite of these.
  • the inorganic fiber examples include metal fiber, carbon fiber, glass fiber, ceramic fiber and the like.
  • Non-metal fibers such as carbon fiber and glass fiber are preferable.
  • organic fibers include natural fibers such as natural cellulose, as well as synthetic fibers.
  • synthetic fibers include olefin resins, polyester resins, polyvinyl acetate resins, ethylene vinyl acetate copolymer resins, polyamide resins, acrylic resins, polyvinyl chloride resins, polyvinylidene chloride resins, polyvinyl ether resins, and polyvinyl ketones.
  • Resin polyether resin, polyvinyl alcohol resin, diene resin, polyurethane resin, phenol resin, melamine resin, furan resin, urea resin, aniline resin, unsaturated polyester resin, alkyd resin, polyimide resin, fluororesin, silicone resin , Fibers containing regenerated cellulose and the like can be used.
  • fibers containing rayon fiber, cupra fiber, lyocell fiber and the like can be used.
  • the synthetic fiber is preferably selected from the group consisting of polyester fiber, polyvinyl alcohol fiber, polyamide fiber, poly (meth) acrylic fiber, regenerated cellulose fiber, and a mixture thereof.
  • the fibers used in the sheet of the present invention are preferably colored fibers and / or fluorescent fibers.
  • the presence of these fibers can be easily confirmed from the outside in the sheet of the present invention because they are present on the surface of the sheet base material. And, for example, anti-counterfeiting property or decorative property can be imparted by the presence of colored fiber and / or fluorescent fiber. Therefore, by using colored fibers and / or fluorescent fibers as fibers, the sheet of the present invention can be particularly preferably used for anti-counterfeiting or decorative applications.
  • the colored fiber a general-purpose one can be used, but it can be obtained, for example, by blending a colorant such as a dye or a pigment with the fiber, preferably an organic fiber.
  • Colored fibers can develop color under visible light (even in the absence of ultraviolet light).
  • a general-purpose fiber can be used, but it can be obtained, for example, by blending a fluorescent agent capable of emitting fluorescence with a fiber, preferably an organic fiber.
  • the fluorescent agent include organic fluorescent dyes or fluorescent pigments, and inorganic fluorescent pigments.
  • organic fluorescent dye examples include fluoressein, coumarin, oxazole, pyrazoline, thiadiazole, spiropyrane, pyrene sulfonic acid, benzimidazole, and stilbene.
  • organic fluorescent pigment examples include polyvinyl chloride resin, alkyd resin, polymethacrylic acid ester resin, urea resin, melamine resin, and fluorescein, eosin, rhodamine 6G, rhodamine B, and basic yellow. Examples thereof include those obtained by uniformly dissolving and pulverizing a dye such as HG.
  • the inorganic fluorescent pigment include zinc sulfide activated by copper, silver, manganese and the like, zinc silicate activated by manganese and the like, zinc sulfide cadmium activated by silver, copper and the like, bismuth and the like.
  • Examples include GeO 2 , Y 2 O 2 S activated by Europium and the like, Y 2 O 3 activated by Europium and the like.
  • a sensitizer such as an anthraquinone type or acetophenone type may be used in combination with these.
  • Fluorescent fibers can emit fluorescence by, for example, irradiation with ultraviolet rays.
  • the fluorescent color can be appropriately adjusted depending on the type and amount of the fluorescent agent used.
  • the fibers are arranged on the surface of the sheet substrate. Specifically, the side surface of the fiber is in contact with the surface of the sheet base material, or a coating layer is present on the surface of the sheet base material, and the coating layer contains the fiber. A part of the fiber may protrude from the coating layer, or all of the fiber may be covered with the coating layer, but it is preferable that at least a part of the fiber is covered with the coating layer. If the entire fiber is exposed from the coating layer, the fiber may fall off during printing or processing.
  • Whether or not the fiber is covered with the coating layer can be determined by observing the surface of the coating layer using an electron microscope.
  • the sheet of the present invention can be produced by simply spraying the fibers on the surface of the sheet base material.
  • the fibers may be present in an oriented state on the surface of the sheet base material, but are preferably randomly distributed.
  • a disordered distribution of fibers can be obtained by spraying a relatively small amount of fibers on the surface of the sheet substrate.
  • the fiber does not need to form a layer on the surface of the sheet substrate.
  • a relatively small amount of fibers may be sparsely present on the surface of the sheet substrate.
  • the sheet of the present invention can be produced by dispersing the fibers on the surface of the sheet base material.
  • the fibers may be present in the coating layer in an oriented state, but are preferably distributed in a disorderly manner (randomly). In this case, for example, by spraying a relatively large amount of fibers on the surface of the sheet base material, an unordered distribution of the fibers forming the layer can be obtained.
  • the coating layer may be formed on the entire surface of the sheet base material, or may be formed on a part of the surface. Further, information such as characters may be formed depending on the shape, position, etc. of the coating layer.
  • the thickness of the coating layer is not particularly limited and can be, for example, 1 to 100 ⁇ m, but it is preferable to provide the thickness of the coating layer so that at least a part of the fibers is covered with the coating layer.
  • binder When the side surface of the fiber is in contact with the surface of the sheet base material, it is preferable that the side surface of the fiber is in contact with the surface of the sheet base material via at least one kind of binder.
  • the coating layer when the coating layer is present on the surface of the sheet base material and the coating layer contains fibers, the coating layer may further contain at least one kind of binder.
  • the binder has a function of joining fibers to each other and / or fixing the fibers to the surface of a sheet base material. As a result, the fibers can be firmly fixed to the surface of the sheet base material.
  • the type of the binder is not particularly limited, but it is preferably made of synthetic resin.
  • the type of the synthetic resin is not particularly limited, and for example, various thermoplastic resins and / or thermosetting resins can be used, but acrylic resins, polyurethane resins, polyester resins, polycarbonate resins, and polyolefin resins can be used. It can be selected from the group consisting of resin, ethylene / vinyl acetate copolymer resin, styrene / butadiene copolymer resin, polyvinyl chloride resin, polyvinylidene chloride resin, nylon resin, polyamide resin, polyvinyl alcohol, and fluorine resin. preferable. These may be used alone or in combination of two or more types.
  • the coating layer may further contain at least one filler.
  • a general-purpose material can be used in the papermaking field.
  • any particles generally referred to as an inorganic filler and an organic filler can be used.
  • inorganic fillers kaolin, calcium carbonate (light calcium carbonate, heavy calcium carbonate), talc, titanium oxide, silica, clay, plastic pigment, colloidal silica, alumina, aluminum hydroxide, calcium sulfate, barium sulfate, zinc oxide. , Satin white, aluminum silicate, magnesium silicate, calcium silicate, magnesium carbonate, zeolite and the like, and composites thereof. Of these, calcium carbonate is preferably used.
  • examples of the organic filler include urea-formalin resin, polystyrene resin, phenol resin, microhollow particles, acrylamide complex, modified insolubilized starch, ungelatinized starch and the like. These may be used alone or in combination of two or more types.
  • the coating layer contains a filler, the printing characteristics of the coating layer are improved. Therefore, the sheet of the present invention can be printed well.
  • the coating layer preferably contains at least one binder and at least one filler.
  • the coating layer may contain other components in addition to the binder and / or filler.
  • other components include colorants, sizing agents, water resistant agents, defoaming agents, thickeners and the like. These may be used alone or in combination of two or more types.
  • the present invention Sheet base material and A sheet comprising at least one type of fiber having a fiber length of 0.5 mm to 4.0 mm and a fiber width of 10 ⁇ m to 350 ⁇ m. Whether the side surface of the fiber is in contact with the surface of the sheet substrate Or A coating layer is present on the surface of the sheet substrate. The coating layer contains the fibers. Regarding use for anti-counterfeiting or decoration of sheets.
  • the sheet of the present invention can be used for various purposes. Since the sheet of the present invention is provided with fibers whose presence can be visually confirmed on the surface, various functions can be exhibited depending on the presence of the fibers.
  • the fiber is water-absorbent
  • the water-absorbing power of the sheet of the present invention is improved, so that the sheet of the present invention can be used as a water-absorbing sheet or the like.
  • the strength of the sheet of the present invention is improved, so that the sheet of the present invention can be used as a reinforcing board or the like.
  • the conductivity and electromagnetic wave shielding property of the sheet of the present invention are improved, so that the sheet of the present invention can be used as a conductive sheet, an electromagnetic wave shielding sheet, or the like.
  • the sheet of the present invention can be suitably used for anti-counterfeiting or decorative purposes.
  • anti-counterfeiting applications include anti-counterfeit sheets used for gift certificates, admission tickets, passports, securities, stamps, tamper-proof labels, money, etc., especially anti-counterfeit paper or security paper.
  • decorative uses include fancy paper, wrapping paper, decorative paper, wallpaper, and the like. These decorations may also serve as the anti-counterfeiting application.
  • a second aspect of the present invention is a coating composition for a sheet substrate. It is a composition containing at least one kind of fiber having a fiber length of 0.5 mm to 4.0 mm and a fiber width of 10 ⁇ m to 350 ⁇ m.
  • the description regarding the first aspect of the present invention applies. Therefore, the one described in the first aspect of the present invention can be used.
  • composition of the present invention may further contain at least one binder.
  • binder the description of the first aspect of the present invention applies. Therefore, the one described in the first aspect of the present invention can be used.
  • composition of the present invention may further contain at least one filler.
  • filler the description of the first aspect of the present invention applies. Therefore, the one described in the first aspect of the present invention can be used.
  • composition of the present invention preferably contains at least one binder and at least one filler.
  • composition of the present invention is used for coating a sheet base material. That is, the composition of the present invention can be used as a paint.
  • the sheet base material the description of the first aspect of the present invention applies. Therefore, the one described in the first aspect of the present invention can be used.
  • composition of the present invention may be either dry or wet.
  • the composition of the present invention When the composition of the present invention is dry, the composition of the present invention does not contain a liquid medium for dispersing the fibers in the composition.
  • the (dry) composition of the present invention may consist solely of an aggregate of fibers.
  • the composition of the present invention when the composition of the present invention is wet, contains a liquid medium for dispersing the fibers in the composition.
  • a liquid medium for dispersing the fibers in the composition.
  • any liquid can be used as long as it is liquid at room temperature and atmospheric pressure, and water, various organic solvents (preferably hydrophilic organic solvents such as ethanol), and these Mixtures can be mentioned, but water is preferred.
  • the liquid medium it is preferable to thicken the liquid medium with at least one thickener in order to enhance the dispersibility of the fibers.
  • a general-purpose thickener can be used.
  • the composition of the present invention can be thickened by using a hydrophilic thickener.
  • the hydrophilic thickener include cellulose-based materials such as hydroxyethyl cellulose, hydroxypropyl cellulose, carboxymethyl cellulose or a salt thereof (particularly sodium salt), and (poly) acrylic acid-based hydrophilic materials such as a carboxyvinyl polymer or a salt thereof. Polymers can be used.
  • the composition of the present invention uses at least one type of fiber having a fiber length of 0.5 mm to 4.0 mm and a fiber width of 10 ⁇ m to 350 ⁇ m, but when the fiber length is less than 0.5 mm, it is difficult to visually recognize the fiber. If the fiber length exceeds 4.0 mm, the fibers are entangled and it becomes difficult to uniformly disperse the fibers in the composition. In addition, if lumps of fibers generated by entanglement of fibers are present in the paint, coating defects such as streaks are likely to occur during coating, and lump-like defects may occur on the sheet during manufacturing. This is not preferable because it causes a decrease in yield and efficiency. Further, when the fiber width is less than 10 ⁇ m, it is difficult to visually recognize the fiber.
  • the amount of fibers in the composition of the present invention is not particularly limited.
  • the blending amount of the fibers can be, for example, 50 to 100% by weight, 60 to 95% by weight, or 70 to 90% based on the total weight of the composition. It may be% by weight.
  • Examples of other components other than fibers include binders, fillers, colorants, sizing agents, water resistant agents, and the like. These may be used alone or in combination of two or more types.
  • the blending amount of the fibers is preferably 10% by weight or less, more preferably 5% by weight or less, based on the total weight of the composition.
  • Examples of other components other than fibers include binders, fillers, thickeners, defoamers, colorants, sizing agents, water resistant agents, and the like. These may be used alone or in combination of two or more types.
  • composition of the present invention by using at least one kind of fiber having a fiber length of 0.5 mm to 4.0 mm and a fiber width of 10 ⁇ m to 350 ⁇ m, it is possible to suppress the entanglement of the fiber and disperse it satisfactorily. it can.
  • the composition of the present invention makes it possible to suitably produce the sheet of the present invention.
  • a third aspect of the present invention is a method for producing a sheet, which comprises a step of coating the composition on a sheet substrate.
  • the coating step can be carried out, for example, by spraying the composition of the present invention on the surface of the sheet base material.
  • the coating step can be carried out, for example, by applying the composition of the present invention to the surface of the sheet base material.
  • a general-purpose coating device such as a gravure coater or an air knife coater can be used for the coating.
  • the above composition in layers to form a coating layer on the surface of the sheet base material. Further, in this case, it is preferable to add a step of removing the liquid medium of the above composition formed on the surface of the sheet base material. For example, the liquid medium is removed by drying while heating as necessary. It is preferable to do so.
  • the sheet obtained by the manufacturing method of the present invention Is the side of the fiber in contact with the surface of the sheet substrate? Or There is a coating layer on the surface of the sheet substrate, The coating layer contains the fibers.
  • the composition used in the production method of the present invention uses at least one type of fiber having a fiber length of 0.5 mm to 4.0 mm and a fiber width of 10 ⁇ m to 350 ⁇ m, but the fiber length is less than 0.5 mm. It is difficult to visually recognize the fibers on the obtained sheet, and when the fiber length exceeds 4.0 mm, the fibers are entangled and it is difficult to apply the fibers uniformly on the surface of the sheet base material. When the fiber width is less than 10 ⁇ m, it is difficult to visually recognize the fiber.
  • the sheet of the present invention is relatively coated or the like by using a composition containing at least one kind of fiber having a fiber length of 0.5 mm to 4.0 mm and a fiber width of 10 ⁇ m to 350 ⁇ m. It can be produced using a simple method.
  • the fibers are entangled in the sheet production equipment by using a composition containing at least one type of fiber having a fiber length of 0.5 mm to 4.0 mm and a fiber width of 10 ⁇ m to 350 ⁇ m. Therefore, it is possible to suppress or avoid sedimentation and clogging of pipes. Therefore, the fibers can be well dispersed on the sheet substrate. Further, when the composition recovered without coating the sheet base material in the coating step is circulated and reused, the circulation is stabilized, so that the manufacturing equipment can be easily controlled.
  • a coater can be used during coating. Inconveniences such as not being placed on the color roll of the above can be suppressed or avoided.
  • Example 1 As the pulp, 100% by mass of bleached kraft pulp made from eucalyptus was used, and a raw material pulp slurry having a beating degree of 380 mL by Canadian standard freeness was prepared by a double disc refiner. Calcined kaolin (BASF, Ansilex 93) 7% by mass, wet silica (Grace, Cyroid 74X 4500) 5% by mass, and rosin sizing agent were added to this raw material pulp slurry in terms of solid content concentration per pulp mass.
  • BASF Ansilex 93
  • wet silica Grace, Cyroid 74X 4500
  • a raw material slurry was prepared by adding 2% by mass, and this raw material slurry was wet-papered according to a conventional method to obtain a base paper having a basis weight of 70 g / m 2 and a thickness of 0.117 mm.
  • a paint containing colored fibers was prepared.
  • styrene / butadiene rubber latex (trade name: Smartex PA-3803, manufactured by Nippon A & L Co., Ltd.) as a binder
  • calcium carbonate (trade name: P-light 100, manufactured by Shiraishi Kogyo Co., Ltd.) as an inorganic filler, increased.
  • Colored rayon fiber (fiber length 5.0 mm, fiber width) having a fiber length of 1.5 mm and a fiber width of 35 ⁇ m as a colored fiber for a paint containing sodium polycarboxylate (trade name: SN Sixner 929S, manufactured by Sannopco) as a thickener.
  • the colored fiber-containing paint was applied to the base paper at a rate of 10 g / m 2 using an air knife coater.
  • the colored fiber-containing paint could be uniformly applied on the base paper.
  • it was dried to prepare a fiber coating sheet provided with a coating layer made of colored fibers on the base paper.
  • Example 2 Except for using colored rayon fibers having a fiber length of 3.0 mm and a fiber width of 35 ⁇ m (obtained by cutting colored rayon fibers having a fiber length of 5.0 mm and a fiber width of 35 ⁇ m (manufactured by Toa Kasei Kogyo Co., Ltd.)) as colored fibers. Made a fiber-coated sheet in the same manner as in Example 1.
  • the colored fibers were well dispersed in the colored fiber-containing paint, and no entanglement between the fibers was observed.
  • the colored fiber-containing paint could be uniformly applied on the base paper.
  • the colored fibers on the surface of the fiber-coated sheet were firmly fixed on the base paper.
  • Example 3 Except for using colored rayon fibers having a fiber length of 4.0 mm and a fiber width of 35 ⁇ m (obtained by cutting colored rayon fibers having a fiber length of 5.0 mm and a fiber width of 35 ⁇ m (manufactured by Toa Kasei Kogyo Co., Ltd.)) as colored fibers. Made a fiber-coated sheet in the same manner as in Example 1.
  • the colored fibers were well dispersed in the colored fiber-containing paint, and no entanglement between the fibers was observed.
  • the colored fiber-containing paint could be uniformly applied on the base paper.
  • the colored fibers on the surface of the fiber-coated sheet were firmly fixed on the base paper.
  • Example 4 As the colored fiber, a colored rayon fiber having a fiber length of 0.5 mm and a fiber width of 35 ⁇ m (a colored rayon fiber having a fiber length of 5.0 mm and a fiber width of 35 ⁇ m (obtained by cutting (manufactured by Toa Kasei Kogyo Co., Ltd.)) was used. A fiber coating sheet was produced in the same manner as in Example 1 except for the above.
  • the colored fibers were well dispersed in the colored fiber-containing paint, and no entanglement between the fibers was observed.
  • the colored fiber-containing paint could be uniformly applied on the base paper.
  • the colored fibers on the surface of the fiber-coated sheet were firmly fixed on the base paper.
  • Example 5 instead of colored fibers, colorless rayon fibers with a fiber length of 5.0 mm and a fiber width of 20 ⁇ m (manufactured by Daiwa Bow Rayon Co., Ltd.) are treated with a fluorescent whitening agent (trade name: Keicol BULC, manufactured by Nippon Kayaku Co., Ltd.). Then, a fiber-coated sheet was produced in the same manner as in Example 1 except that the fluorescent fiber obtained by cutting into a fiber length of 1.5 mm was used.
  • a fluorescent whitening agent trade name: Keicol BULC, manufactured by Nippon Kayaku Co., Ltd.
  • Fluorescent fibers were well dispersed in the fluorescent fiber-containing paint, and no entanglement between the fibers was observed.
  • the fluorescent fiber-containing paint could be uniformly applied on the base paper.
  • Example 6 instead of colored fibers, polyvinyl alcohol fibers with a fiber length of 2.0 mm and a fiber width of 25 ⁇ m (manufactured by Kuraray Co., Ltd.) are treated with a fluorescent whitening agent (trade name: Keicol BULC, manufactured by Nippon Kayaku Co., Ltd.). A fiber coating sheet was produced in the same manner as in Example 1 except that the obtained fluorescent fiber was used.
  • a fluorescent whitening agent trade name: Keicol BULC, manufactured by Nippon Kayaku Co., Ltd.
  • Fluorescent fibers were well dispersed in the fluorescent fiber-containing paint, and no entanglement between the fibers was observed.
  • the fluorescent fiber-containing paint could be uniformly applied on the base paper.
  • Example 7 instead of colored fibers, polyamide fibers with a fiber length of 1.5 mm and a fiber width of 20 ⁇ m (manufactured by Chubu Pile Industry Co., Ltd.) are treated with a fluorescent whitening agent (trade name: Kayahole Nu, manufactured by Nippon Kayaku Co., Ltd.). A fiber coating sheet was produced in the same manner as in Example 1 except that the fluorescent fiber obtained in the above process was used.
  • a fluorescent whitening agent trade name: Kayahole Nu, manufactured by Nippon Kayaku Co., Ltd.
  • Fluorescent fibers were well dispersed in the fluorescent fiber-containing paint, and no entanglement between the fibers was observed.
  • the fluorescent fiber-containing paint could be uniformly applied on the base paper.
  • Example 8 Fibers similar to Example 1 except that hardwood pulp fibers were treated with a fluorescent whitening agent (trade name: Keicol BULC, manufactured by Nippon Kayaku Co., Ltd.) instead of colored fibers. A coating sheet was prepared. When the fiber length and fiber width of hardwood pulp fibers were measured with an optical microscope, the fiber length was 0.5 mm and the fiber width was 25 ⁇ m.
  • a fluorescent whitening agent trade name: Keicol BULC, manufactured by Nippon Kayaku Co., Ltd.
  • Fluorescent fibers were well dispersed in the fluorescent fiber-containing paint, and no entanglement between the fibers was observed.
  • the fluorescent fiber-containing paint could be uniformly applied on the base paper.
  • Example 9 As a fluorescent fiber, a colorless rayon fiber (manufactured by Daiwa Bow Rayon Co., Ltd.) having a fiber length of 5.0 mm and a fiber width of 305 ⁇ m is treated with a fluorescent whitening agent (trade name: Keicol BULC, manufactured by Nippon Kayaku Co., Ltd.). A fiber-coated sheet was produced in the same manner as in Example 5, except that fluorescent fibers obtained by cutting to a fiber length of 1.5 mm were used.
  • a fluorescent whitening agent trade name: Keicol BULC, manufactured by Nippon Kayaku Co., Ltd.
  • Fluorescent fibers were well dispersed in the fluorescent fiber-containing paint, and no entanglement between the fibers was observed.
  • the fluorescent fiber-containing paint could be uniformly applied on the base paper.
  • Example 10 When the colored fiber-containing paint was applied to the base paper, a fiber coating sheet was produced in the same manner as in Example 1 except that the coating ratio was 5 g / m 2 .
  • the colored fiber-containing paint could be evenly applied on the base paper. Furthermore, it was possible to visually confirm the presence of colored fibers on the surface of the fiber-coated sheet. When the fiber coating sheet was observed with an electron microscope, colored fibers exposed from the coating layer were confirmed, but the colored fibers were firmly fixed on the base paper.
  • Example 11 A fiber coating sheet was prepared in the same manner as in Example 1 except that a polypropylene film was used instead of the base paper. It was possible to visually confirm the presence of colored fibers on the surface of the fiber-coated sheet. The colored fibers on the surface of the fiber-coated sheet were firmly fixed on the polypropylene film.
  • Example 1 A fiber coating sheet was produced in the same manner as in Example 1 except that uncut colored rayon fiber (manufactured by Toa Kasei Kogyo Co., Ltd.) having a fiber length of 5.0 mm was used as the colored fiber.
  • uncut colored rayon fiber manufactured by Toa Kasei Kogyo Co., Ltd.
  • the colored fibers were entangled with each other in the colored fiber-containing paint. Further, when the colored fiber-containing paint was applied onto the base paper, streaky defects due to the entangled fibers occurred, and it was not possible to apply the paint uniformly. Although it was possible to visually confirm the presence of colored fibers on the surface of the fiber-coated sheet, some of the colored fibers on the surface of the fiber-coated sheet fell off from the base paper.
  • Example 2 A fiber coating sheet was produced in the same manner as in Example 1 except that a fiber cut so as to have a fiber length of 0.4 mm or less was used as the colored fiber.
  • the colored fibers could not be visually confirmed in the colored fiber-containing paint and on the base paper. Therefore, the presence of colored fibers on the surface of the fiber-coated sheet could not be visually confirmed.
  • Example 5 A fiber coating sheet was produced in the same manner as in Example 5 except that the colored fiber obtained by cutting a colored polyamide fiber having a fiber width of 400 ⁇ m into a fiber length of 1.5 mm was used as the colored fiber.

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Abstract

L'invention concerne une feuille qui est équipée d'un substrat de feuille, et d'au moins une sorte de fibres de longueur de fibres comprise entre ０,５ｍｍ et ４,０ｍｍ et de largeur de fibres comprise entre １０μｍ et ３５０μｍ. Soit une face latérale desdites fibres est mise en contact avec la surface dudit substrat de feuille, soit une couche de revêtement est présente à la surface dudit substrat de feuille, et ladite couche de revêtement contient lesdites fibres. La feuille de l'invention peut être fabriquée selon un procédé relativement simple malgré la mise en œuvre des fibres, et permet de vérifier visuellement la présence des fibres, par exemple, elle peut être mise en œuvre de manière adéquate dans une application dans un but de prévention de la falsification ou dans un but décoratif.
PCT/JP2020/010029 2019-03-20 2020-03-09 Feuille, et procédé de fabrication de celle-ci WO2020189375A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5252716A (en) * 1975-10-27 1977-04-27 Keiko Tooyama Fibrous painting material
JPH06272176A (ja) * 1993-03-17 1994-09-27 Iwao Hishida 着色剤
JPH1193096A (ja) * 1997-09-18 1999-04-06 Tokushu Paper Mfg Co Ltd 蛍光発色する繊維状物、及びこれを使用した偽造防止用紙、及び偽造防止印刷物
JP2008248403A (ja) * 2007-03-29 2008-10-16 Nippon Paper Industries Co Ltd 蛍光繊維混入紙

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1110815A (ja) * 1997-06-19 1999-01-19 Toyobo Co Ltd 磁気記録カード用複合基材およびそれを用いた磁気記録カード
JP2003064314A (ja) * 2001-08-23 2003-03-05 Nippon Paint Co Ltd 塗料組成物
JP2005255811A (ja) * 2004-03-11 2005-09-22 Shikoku Chem Corp 電磁波シールド機能を有する内装塗材及び該内装塗材を用いた電磁波シールド方法
JP5760414B2 (ja) * 2010-12-08 2015-08-12 凸版印刷株式会社 抄き込み部材、偽造防止用紙及びこれらの製造方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5252716A (en) * 1975-10-27 1977-04-27 Keiko Tooyama Fibrous painting material
JPH06272176A (ja) * 1993-03-17 1994-09-27 Iwao Hishida 着色剤
JPH1193096A (ja) * 1997-09-18 1999-04-06 Tokushu Paper Mfg Co Ltd 蛍光発色する繊維状物、及びこれを使用した偽造防止用紙、及び偽造防止印刷物
JP2008248403A (ja) * 2007-03-29 2008-10-16 Nippon Paper Industries Co Ltd 蛍光繊維混入紙

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