WO2011033557A1 - Papier propre et son procédé de production - Google Patents

Papier propre et son procédé de production Download PDF

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Publication number
WO2011033557A1
WO2011033557A1 PCT/JP2009/004617 JP2009004617W WO2011033557A1 WO 2011033557 A1 WO2011033557 A1 WO 2011033557A1 JP 2009004617 W JP2009004617 W JP 2009004617W WO 2011033557 A1 WO2011033557 A1 WO 2011033557A1
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Prior art keywords
meth
acrylic resin
binder
clean paper
layer
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PCT/JP2009/004617
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English (en)
Japanese (ja)
Inventor
筒井秀
Original Assignee
特種製紙株式会社
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Application filed by 特種製紙株式会社 filed Critical 特種製紙株式会社
Priority to JP2011531635A priority Critical patent/JP5495073B2/ja
Priority to PCT/JP2009/004617 priority patent/WO2011033557A1/fr
Publication of WO2011033557A1 publication Critical patent/WO2011033557A1/fr

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    • 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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • 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
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • 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
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/10—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • 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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/12—Coating on the layer surface on paper layer
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • 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
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/028—Paper layer
    • 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
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/04—Impregnation, embedding, or binder material
    • B32B2260/046—Synthetic resin
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/41—Opaque
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/546—Flexural strength; Flexion stiffness
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/746—Slipping, anti-blocking, low friction
    • 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
    • B32B2554/00—Paper of special types, e.g. banknotes
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H19/58—Polymers or oligomers of diolefins, aromatic vinyl monomers or unsaturated acids or derivatives thereof
    • 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/80—Paper comprising more than one coating
    • D21H19/84—Paper comprising more than one coating on both sides of the substrate

Definitions

  • the present invention relates to a clean paper and a manufacturing method thereof.
  • clean paper dust-free paper
  • dust-free paper paper with low dust generation is used in order to avoid malfunctions of various devices due to fine dust, product contamination, etc. Yes.
  • the clean paper needs to have a characteristic that paper dust or other foreign matters are not generated even when it is torn or rubbed, or the amount of generation is small. Therefore, as a clean paper, a paper obtained by impregnating a base paper made of natural fiber or synthetic fiber with a resin in order to suppress dust generation is widely known.
  • JP-A-60-146099, JP-A-63-105199, JP-A-9-87993, JP-A-2001-293951, JP-A-2003-49392, JP-A-2005-105486, Japanese Patent Application Laid-Open Nos. 2005-281192 and 2008-190065 describe clean papers in which a base paper is impregnated with a resin emulsion.
  • JP-A-9-87993 discloses a clean paper provided with a mixture of two kinds of polymer substances having greatly different glass transition temperatures
  • JP-A-2008-190065 discloses a glass transition.
  • a clean paper to which a mixture of two kinds of acrylic resin emulsions and polyvinyl alcohols having greatly different temperatures is applied is described.
  • the resin having a low glass transition temperature is partially present on the surface of the clean paper, it is impossible to completely prevent blocking. Further, since these require a large amount of resin impregnation, there is a problem that dust generation cannot be suppressed if the amount of resin is reduced.
  • the present invention has been made in view of such problems, and is compatible with low dust generation and opaqueness, high rigidity, low blocking property, or low contamination such as a cutting blade when cutting.
  • the purpose is to provide clean paper.
  • the object of the present invention is a base paper, A (meth) acrylic resin layer comprising at least one (meth) acrylic resin, and A clean paper comprising a binder layer comprising at least one binder,
  • the binder layer is located on the (meth) acrylic resin layer, This is achieved by a clean paper in which one surface of the binder layer constitutes at least a part of the surface of the clean paper.
  • the impregnation ratio of the (meth) acrylic resin is preferably 0.8 to less than 5.0%.
  • the (meth) acrylic resin may have a glass transition temperature of ⁇ 40 ° C. to less than 0 ° C.
  • the binder may be a (meth) acrylic resin having a glass transition temperature of 0 ° C. to 200 ° C.
  • the (meth) acrylic resin layer preferably further contains polyvinyl alcohol.
  • the binder may be a water-soluble binder.
  • the binder layer is preferably present at a rate of 0.05 to 10 g / m 2 in terms of dry weight per unit area of the base paper.
  • An intermediate layer may exist between the (meth) acrylic resin layer and the binder layer.
  • one surface of the said (meth) acrylic-type resin layer and the other surface of the said binder layer contact. In that case, at least a part of a contact surface between one surface of the (meth) acrylic resin layer and the other surface of the binder layer may be mixed.
  • the binder layer can include at least one lubricant.
  • the lubricant is preferably a wax.
  • the clean paper of the present invention comprises a step of applying at least one (meth) acrylic resin on a base paper to form a (meth) acrylic resin layer, and at least on the (meth) acrylic resin layer. It can be manufactured through a step of forming a binder layer by applying one kind of binder.
  • a step of forming an intermediate layer on at least a part of the surface of the (meth) acrylic resin layer may be provided.
  • the clean paper of the present invention is compatible with at least one, preferably all of low dust generation, opacity, high rigidity, low blocking property, and low contamination such as a cutting blade when cutting. .
  • the binder layer is present on the surface of the clean paper, dust generation from the surface can be suppressed. Therefore, it is not necessary to use a large amount of (meth) acrylic resin. Therefore, in the present invention, it is possible to realize low dust generation properties while suppressing the amount of resin impregnated into the base paper. As described above, according to the present invention, the amount of resin impregnated into the base paper can be reduced, so that the environmental load is low and the manufacturing cost is advantageous.
  • the clean paper of the present invention can suppress the amount of resin impregnation, it can maintain high opacity. Therefore, it is difficult to see characters and the like written on the clean paper. Moreover, since the clean paper of this invention can suppress the resin impregnation amount, it can maintain high rigidity. Therefore, the clean paper of the present invention is excellent in writing characteristics. And even if it is a case where the clean paper of this invention is piled up, since there is little blocking, it is excellent also in preservability. Further, since the clean paper of the present invention does not contaminate the cutting blade used at the time of cutting, it does not contaminate other clean paper through the cutting blade.
  • the base paper that is the base material of the clean paper of the present invention is not particularly limited, and those generally used for clean paper can be used.
  • the base paper can be composed of natural fibers, chemical fibers or mixtures thereof.
  • natural fibers include natural pulps such as wood fibers such as hardwoods and conifers; non-wood fibers such as hemp, bamboo, firewood, kenaf, and Manila hemp.
  • chemical fibers include synthetic fibers such as polyethylene, polypropylene, polyamide, and polyester; semi-synthetic fibers such as acetate and rayon.
  • modified pulp such as cationized pulp and mercerized pulp can be used.
  • the base paper natural fibers are preferred, and wood fibers such as softwood bleached kraft pulp (NBKP), softwood bleached sulfite pulp (NBSP), hardwood bleached kraft pulp (LBKP), hardwood bleached sulfite pulp (LBSP) and the like are preferred.
  • the base paper can be produced by making one type or two or more types of fibers with a general paper machine.
  • a general paper machine for example, a long net paper machine, a short net paper machine, a circular net paper machine, or a combination of these can be used.
  • the fibers constituting the base paper may be beaten in advance as necessary.
  • the beating means is not particularly limited, and for example, a general beating device such as a double disc refiner, a single disc refiner, or a beater can be used.
  • the beating degree is not limited, but 100 to 600 ml C.I. F. S. 300 to 500 ml C.I. F. S. Is more preferable.
  • wet paper strength enhancer it is preferable to add a wet paper strength enhancer to the base paper in order to improve the strength when wet.
  • One type of wet paper strength enhancer may be used, or two or more types may be used in combination.
  • the wet paper strength enhancer is preferably added when the base paper is made.
  • a general thing can be used as a wet paper strength enhancer, For example, a polyamide epichlorohydrin type resin, a melamine type resin, a urea-type resin etc. can be used.
  • the wet paper strength enhancer can be used, for example, in the range of 0.02 to 3% by mass, preferably 0.05 to 1% by mass of the base paper.
  • a dry paper strength enhancer may be added to the base paper in order to improve the strength during drying.
  • One type of dry paper strength enhancer may be used, or two or more types may be used in combination.
  • a dry paper strength enhancer is also preferably added during papermaking of the base paper.
  • the dry paper strength enhancer a general one can be used.
  • an amphoteric polyacrylamide resin can be used.
  • the dry paper strength enhancer can be used, for example, in the range of 0.1 to 3% by mass, preferably 0.1 to 1% by mass of the base paper.
  • fillers that are generally used may be added as long as the object of the present invention is not impaired.
  • the filler include inorganic fillers such as clay, kaolin, talc, titanium dioxide, calcium carbonate, aluminum hydroxide, zinc oxide, aluminum silicate, calcium silicate, synthetic amorphous silica, and zeolite; Examples thereof include organic fillers such as (meth) acrylic resin pigments and polyethylene.
  • One type of filler may be used, or two or more types may be used in combination.
  • the filler is preferably added at the time of making the base paper.
  • the filler can be used, for example, in the range of 0.01 to 5% by mass, preferably 0.1 to 2% by mass of the base paper.
  • various additives can be used for the base paper.
  • dyes, pigments, slime control agents, fixing agents, yield improvers, freeness improvers, antifoaming agents, and the like can be used as appropriate.
  • the basis weight of the base paper is not particularly limited, but can be, for example, 30 to 250 g / m 2 . 30 to 100 g / m 2 is preferable.
  • the (meth) acrylic resin used in the present invention is not particularly limited.
  • (meth) acrylic acid homopolymer or copolymer, (meth) acrylic acid ester Homopolymers or copolymers, copolymers of (meth) acrylic acid and its esters, copolymers of styrene- (meth) acrylic acid and / or (meth) acrylic esters, vinyl acetate- (meth) acrylic acid and / or (meth) acrylic Copolymers of acid esters can be used.
  • (meth) acrylic acid monomers such as acrylic acid, methacrylic acid, methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, butyl acrylate, butyl methacrylate are essential, and as required (Meth) acrylic resins can be obtained by polymerizing styrene, styrene derivatives, vinyl acetate, or comonomers such as acrylonitrile, butadiene, maleic acid, acrylamide, and methacrylamide.
  • the (meth) acrylic resin one type may be used, or two or more types may be used in combination.
  • the (meth) acrylic resin preferably has a glass transition temperature of ⁇ 40 ° C. to less than 0 ° C., more preferably ⁇ 24 ° C. to less than 0 ° C. If the glass transition temperature is less than ⁇ 40 ° C., the clean paper becomes excessively soft and blocking may occur. On the other hand, when the glass transition temperature is 0 ° C. or higher, dust generation from the inside of the clean paper tends to occur.
  • Binder The binder used in the present invention is not particularly limited, and those generally used in the field of papermaking can be used.
  • the binder may be water-insoluble or water-soluble, but is preferably water-soluble.
  • the water-insoluble binder for example, polyethylene resins, polystyrene resins, polybutene resins, chloroprene resins, vinyl chloride resins, vinylidene chloride resins, polyester resins, polyurethane resins, and the like can be used.
  • a resin having a glass transition temperature of 0 ° C. to 200 ° C. preferably a (meth) acrylic resin can be used.
  • the glass transition temperature of the binder is less than 0 ° C., the surface of the clean paper becomes soft, so that blocking is inevitable. On the other hand, when the glass transition temperature exceeds 200 ° C., the stiffness of the clean paper may be excessive.
  • the water-soluble binder include hydroxyethyl cellulose, methyl cellulose, carboxymethyl cellulose, polyvinyl alcohol, polyacrylamide, sodium polyacrylate, polyvinyl pyrrolidone, polyvinyl acetate, oxidized starch, acetylated starch, esterified starch, etherified starch, and cation.
  • Starch such as modified starch, hydroxylethyl etherified starch, modified starch, urea phosphate esterified starch, dextrin, casein, synthetic protein, soybean protein and the like can be used.
  • the binder is preferably a (meth) acrylic resin, polyvinyl alcohol, or polyacrylamide having a glass transition temperature of 0 ° C. to 200 ° C., and a (meth) acrylic resin having a glass transition temperature of 0 ° C. to 200 ° C., or polyvinyl alcohol. Is particularly preferred.
  • Polyvinyl alcohol here includes partially saponified polyvinyl alcohol, fully saponified polyvinyl alcohol, functional group-modified (carboxyl group, carbonyl group, epoxy group, amino group, amine group, thiol group, sulfonic acid group And various modified polyvinyl alcohols such as polyvinyl alcohol).
  • Polyvinyl alcohol can have a glass transition temperature of 0 ° C to 200 ° C.
  • One type of binder may be used, or two or more types may be used in combination.
  • the clean paper of the present invention essentially comprises a base paper, a (meth) acrylic resin layer, and a binder layer.
  • the (meth) acrylic resin layer contains at least one kind of the (meth) acrylic resin
  • the binder layer contains at least one kind of the binder.
  • the binder layer is positioned on the (meth) acrylic resin layer, and one surface of the binder layer constitutes at least a part, preferably the entire surface of the clean paper.
  • “up” means the direction from the base paper toward the surface of the clean paper.
  • FIGS. 1 to 3 show examples of the clean paper of the present invention.
  • FIGS. 1 to 3 are cross-sectional views showing different examples of the clean paper of the present invention.
  • the (meth) acrylic resin layer 2 and the binder layer 3 are laminated in this order on both sides of the base paper 1.
  • One surface of the binder layer 3 constitutes the surface of the clean paper.
  • the (meth) acrylic resin layer 2 is covered with the binder layer 3, so that the amount of (meth) acrylic resin used is reduced. Can exhibit low dust-free properties. Therefore, the clean paper of the present invention can be provided with opacity and high rigidity as well as excellent low dust generation, and has excellent writing characteristics.
  • the presence of the binder layer 3 causes little blocking even when the clean paper of the present invention is stacked, and does not contaminate the cutting blade used at the time of cutting.
  • the base paper 1 is impregnated with a part of the (meth) acrylic resin layer 2.
  • the whole (meth) acrylic resin layer 2 is impregnated in the base paper 1, but a part of the base paper 1 is not impregnated with the (meth) acrylic resin.
  • the entire (meth) acrylic resin layer 2 is impregnated in the base paper 1.
  • FIG. 1 to FIG. 3 are schematic cross-sectional views, and the surface of the (meth) acrylic resin layer 2 impregnated in the base paper 1 and / or the binder layer 3 of the (meth) acrylic resin layer 2 are in contact with each other.
  • the surface on the side may not be a straight line, and may be a bent line composed of straight lines or curves having various lengths and directions, for example.
  • the entire (meth) acrylic resin layer 2 is impregnated in the base paper 1 as shown in FIGS.
  • the base paper 1 is preferably completely impregnated.
  • the impregnation ratio of the (meth) acrylic resin layer 2 is not particularly limited, but is preferably 0.8 to less than 5.0%, more preferably 1.0 to 5.0% of the total mass of the base paper 1. 1.2 to 4.0% is even more preferable. If it is less than 0.8%, there is a risk that the dust generation property may increase. If it exceeds 5.0%, the amount of impregnated resin is too large, and the opacity and stiffness of the paper may be excessively reduced. In addition, a large amount of resin is disadvantageous in terms of manufacturing cost.
  • the (meth) acrylic resin layer 2 preferably contains polyvinyl alcohol.
  • polyvinyl alcohol By blending polyvinyl alcohol in the (meth) acrylic resin layer 2, the dust generation property can be further lowered and the rigidity can be improved.
  • the blending amount of the polyvinyl alcohol is not particularly limited, but can be 5 to 50% by mass of the (meth) acrylic resin layer 2, and more preferably 20 to 40% by mass.
  • the binder layer 3 covers the entire surface of the (meth) acrylic resin layer 2.
  • the binder layer 3 covers the entire surface of the (meth) acrylic resin layer 2.
  • the (meth) acrylic resin layer 2 and the binder layer 3 may be disposed only on one side of the clean paper.
  • the (meth) acrylic resin layer 2 and the binder layer 3 may be disposed only on the side where the film does not exist.
  • the entire surface of the base paper 1 is covered with the (meth) acrylic resin layer 2 and the binder layer 3, but the entire surface of the base paper 1 is covered with the (meth) acrylic resin layer 2 and It does not need to be covered with the binder layer 3.
  • the (meth) acrylic resin layer 2 or the binder layer 3 may not exist on a part of the surface of the base paper 1.
  • the entire surface of the base paper 1 is coated with at least one of the (meth) acrylic resin layer 2 or the binder layer 3, In view of reducing the amount of use of the (meth) acrylic resin, it is more preferable that the binder layer 3 is coated.
  • the contact surface between the (meth) acrylic resin layer 2 and the binder layer 3 is shown as a straight line, but the contact surface may not be a straight line as shown in the figure.
  • the contact surface may be a bent line composed of straight lines or curves having various lengths and directions.
  • one surface of the (meth) acrylic resin layer 2 and the other surface of the binder layer 3 are in contact with each other, but they do not necessarily need to be in contact with each other.
  • an intermediate layer may exist between the (meth) acrylic resin layer 2 and the binder layer 3.
  • the intermediate layer may be a layer made of any material. By providing the intermediate layer, mixing of the (meth) acrylic resin and the binder can be avoided.
  • the intermediate layer may exist only on a part of the surface of the (meth) acrylic resin layer 2, and the intermediate layer may not exist on the other surface of the (meth) acrylic resin layer 2. In this case, the other surface of the (meth) acrylic resin layer 2 is in contact with the binder layer 3.
  • At least part of the contact surfaces of the (meth) acrylic resin layer 2 and the binder layer 3 may be mixed.
  • the miscibility of the contact surface mainly depends on the constituent material of the (meth) acrylic resin layer 2, particularly the constituent material of the (meth) acrylic resin and the binder layer 3, particularly the mutual permeability of the binder.
  • the (meth) acrylic resin layer 2 and the binder layer 3 are not mixed and integrated.
  • the binder layer 3, in dry weight per unit area of the base paper is preferably present in a proportion of 0.05 ⁇ 10g / m 2, more preferably 0.1 ⁇ 10g / m 2, 0.5 ⁇ 10.0 g / m 2 is more preferable, and 1.0 to 5.0 g / m 2 is more preferable. If it is less than 0.05 g / m 2 , it is difficult to sufficiently cover the base paper 1, and there is a possibility that the dust generation property is increased. Moreover, when it exceeds 10 g / m ⁇ 2 >, there exists a possibility that the rigidity of a clean paper may become excess. Moreover, when there is much binder amount, it is disadvantageous also in terms of manufacturing cost.
  • the dry weight here is the total when the binder layer 3 is present on both sides of the base paper 1.
  • the glass transition temperature of the (meth) acrylic-type resin which comprises the binder layer 3 comprises the (meth) acrylic-type resin layer 2 ( It is higher than the glass transition temperature of the (meth) acrylic resin.
  • the binder layer 3 preferably contains at least one lubricant.
  • the lubricant is preferably a wax, and any wax can be used, but olefinic waxes such as polyethylene wax and polypropylene wax are preferred. By including the wax, the dust generation suppressing effect and the blocking preventing effect of the clean paper of the present invention can be enhanced.
  • the (meth) acrylic resin layer 2 does not need to be impregnated in the base paper 1, and the (meth) acrylic resin layer 2 may exist on the surface of the base paper 1.
  • the base paper 1 is impregnated with at least a part of the (meth) acrylic resin layer 2.
  • at least a part of the binder layer 3 is preferably impregnated in the base paper 1.
  • the surface of the binder layer 3 on the side impregnated in the base paper 1 does not have to be a straight line as shown, for example, straight lines having various lengths and directions. Alternatively, it may be a bent line composed of a curve.
  • the clean paper of the present invention is a (meth) acrylic resin layer forming step in which at least one (meth) acrylic resin is applied to a base paper to form a (meth) acrylic resin layer, and And a production method comprising a binder layer forming step of forming a binder layer by applying at least one binder on the (meth) acrylic resin layer.
  • the (meth) acrylic resin layer forming step at least one (meth) acrylic resin is applied onto the base paper.
  • the base paper is preferably impregnated with (meth) acrylic resin. Therefore, it is preferable that the (meth) acrylic resin is in a liquid form in order to improve the impregnation property.
  • the liquid may be in the form of a solution or emulsion of a (meth) acrylic resin.
  • the solvent of the solution and the medium of the emulsion are arbitrary, and water and various organic solvents can be used, but water is preferable from the viewpoint of environmental burden.
  • the (meth) acrylic resin is more preferably in the form of an aqueous solution or aqueous emulsion in which the (meth) acrylic resin is dispersed in an aqueous medium composed of water or a mixture of water and an aqueous organic solvent.
  • aqueous organic medium any organic solvent miscible with water can be used, but a lower alcohol such as ethanol is preferable.
  • a (meth) acrylic resin layer that is preferably partially or entirely impregnated is formed on the base paper.
  • the concentration of the (meth) acrylic resin in the solution or emulsion is arbitrary, but is preferably 1 to 50% by weight, and preferably 1 to 30% by weight. 1 to 10% by mass is more preferable, and 1 to 5% by mass is even more preferable.
  • various fillers and additives can be blended as necessary within a range not impairing the object of the present invention.
  • fillers examples include inorganic fillers such as titanium dioxide, kaolin, calcium carbonate, clay, talc, aluminum hydroxide, zinc oxide, calcium silicate, and zeolite, styrene or acrylic plastic pigments, polyethylene, microcapsules, and synthetic resins.
  • Organic fillers such as Examples of the additive include a sizing agent, a water resistant agent, a crosslinking agent, a viscosity modifier, a dispersant, an antifoaming agent, a pH adjuster, a surfactant, a dye, and a pigment.
  • the coating method is not particularly limited, and a general coating apparatus such as a bar coater, an air knife coater, a blade coater, a rod coater, a gravure coater, a size press coater, a gate roll coater, or various impregnation apparatuses is used.
  • the method can be used.
  • the base paper is preferably coated so that the impregnation amount (solid content) of the (meth) acrylic resin is 0.8 to less than 5.0% of the total weight of the base paper, and 1.0 to 5.0% Is more preferable, and 1.2 to 4.0% is even more preferable.
  • the binder layer forming step at least one binder is applied on the (meth) acrylic resin layer formed in the (meth) acrylic resin layer forming step.
  • the binder is preferably in a liquid form.
  • the liquid may be in the form of a binder solution or an emulsion.
  • the solvent of the solution and the medium of the emulsion are arbitrary, and water and various organic solvents can be used, but water is preferable from the viewpoint of environmental burden.
  • the binder when it is water-insoluble, it is preferably in the form of an emulsion, particularly water or an aqueous emulsion in which the binder is dispersed in an aqueous medium as described above, and when the binder is water-soluble, water or It is preferably in the form of an aqueous solution in which a binder is dissolved in an aqueous medium as described above.
  • the binder preferably contains a lubricant such as polyethylene wax, if necessary.
  • concentration of the binder in the emulsion or aqueous solution is arbitrary, but is preferably 1 to 50% by mass, preferably 1 to 30% by mass, more preferably 1 to 10% by mass, and even more preferably 1 to 5% by mass.
  • additives can be blended as necessary within a range not impairing the object of the present invention.
  • additives include sizing agents, water resistance agents, thickeners, dispersants, antifoaming agents, antifoaming agents, antistatic agents, antioxidants, ultraviolet absorbers, fluorescent whitening agents, pH adjusting agents, Examples include preservatives, surfactants, dyes, pigments and the like.
  • the coating method is not particularly limited, and the above-described method using a general apparatus such as a bar coater can be used.
  • a general apparatus such as a bar coater
  • the dry weight here is the total when the binder layer 3 is present on both sides of the base paper 1.
  • the intermediate layer may be a layer made of any material.
  • the intermediate layer can be formed, for example, by applying a material constituting the intermediate layer onto at least a part of the surface of the (meth) acrylic resin layer. In order to facilitate application, the material is preferably in liquid form.
  • the clean paper of the present invention has a dust generation amount of 100 pieces / L or less, preferably 30 pieces / L or less, more preferably 15 pieces in a rubbing test measured according to SEMI (SEMICONDUCTOR EQUIPEMENTMEMATERIALS INTERNATIONAL) standard G67-0996. / L or less.
  • SEMI SEMICONDUCTOR EQUIPEMENTMEMATERIALS INTERNATIONAL
  • the clean paper of the present invention can have a stiffness of 70 to 80 (longitudinal) expressed by Clark stiffness based on JIS-P8143 (2009).
  • the clean paper of the present invention can have an opacity of 75% or more based on JIS-P8149 (2000).
  • the clean paper of the present invention can have a high blocking performance that hardly adheres to each other when they are stacked at a pressure of 50 kg / cm 2 under a temperature condition of 50 ° C.
  • the clean paper of the present invention can be suitably used in an environment where generation of fine dust should be avoided, such as in a clean room.
  • the clean paper of the present invention can be used as copy paper, memo paper, measurement recording paper, wrapping paper, work paper, process paper, and the like in a clean room.
  • An acrylic resin solution was prepared by adding water to an acrylic resin having a glass transition temperature of ⁇ 20 ° C. (trade name: AM-920, manufactured by Showa Polymer Co., Ltd.) so as to have a solid content concentration of 10%.
  • binder liquid 75 parts by mass of polyvinyl alcohol (trade name: Gohsenol P7000, manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) and 25 parts by mass of polyacrylamide (trade name: Polymer Set 305, manufactured by Arakawa Chemical Industry Co., Ltd.) were mixed, and the resulting mixture was mixed.
  • Example 1 A base paper was impregnated with the acrylic resin liquid so that the acrylic resin impregnation ratio was 2.5% and dried to obtain an acrylic resin-impregnated base paper having a basis weight of 64 g / m 2 . Further, by applying the binder liquid on both sides with a bar coater so that the coating amount per side is 0.65 g / m 2 (solid content) (total coating amount 1.30 g / m 2 ) and drying. Got clean paper.
  • Example 2 A clean paper was obtained in the same manner as in Example 1 except that the acrylic resin liquid was impregnated so that the acrylic resin impregnation ratio was 0.8%.
  • Example 3 A clean paper was obtained in the same manner as in Example 1 except that the acrylic resin liquid was impregnated so that the acrylic resin impregnation ratio was 1.2%.
  • Example 4 A clean paper was obtained in the same manner as in Example 1 except that the acrylic resin liquid was impregnated so that the acrylic resin impregnation ratio was 4.0%.
  • Example 5 A clean paper was obtained in the same manner as in Example 1 except that the binder liquid was applied on both sides so that the amount of binder applied was 0.12 g / m 2 (0.06 g / m 2 per side).
  • Example 6 To obtain a clean paper, except that the coating amount of the binder was applied the binder solution on both surfaces so that 0.47 g / m 2 (per side 0.235 g / m 2) in the same manner as in Example 1.
  • Example 7 A clean paper was obtained in the same manner as in Example 1 except that the binder liquid was applied on both sides so that the amount of the binder applied was 4.7 g / m 2 (2.35 g / m 2 per side).
  • Example 8 An acrylic resin solution was prepared as follows. 50 parts by mass of polyvinyl alcohol (trade name: Gohsenol P7000, manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) per 100 parts by mass of an acrylic resin having a glass transition temperature of ⁇ 20 ° C. (trade name: AM-920, manufactured by Showa Polymer Co., Ltd.) It was added and water was added thereto to prepare a solid concentration of 10%. A clean paper was obtained in the same manner as in Example 1 except that this acrylic resin solution was used.
  • polyvinyl alcohol trade name: Gohsenol P7000, manufactured by Nippon Synthetic Chemical Industry Co., Ltd.
  • AM-920 manufactured by Showa Polymer Co., Ltd.
  • a binder solution was prepared as follows. Styrene acrylic surface sizing agent (product name: SE-2012) 9 by 100 parts by mass of acrylic resin (product name: AM-2270, manufactured by Showa Polymer Co., Ltd.) having a glass transition temperature of 20 ° C. 9 Part by mass and 3.5 parts by mass of polyethylene wax (trade name: Polylon L-787, manufactured by Chukyo Yushi Co., Ltd.) were added to prepare a binder liquid having a solid content concentration of 3%. A clean paper was obtained in the same manner as in Example 1 except that this binder solution was used.
  • Styrene acrylic surface sizing agent product name: SE-2012
  • acrylic resin product name: AM-2270, manufactured by Showa Polymer Co., Ltd.
  • polyethylene wax trade name: Polylon L-787, manufactured by Chukyo Yushi Co., Ltd.
  • acrylic resin trade name: AM-920, manufactured by Showa Polymer Co., Ltd.
  • polyvinyl alcohol trade name: Gohseno
  • a base paper having a basis weight of 65.0 g / m 2 was obtained by impregnating the base paper with the water-based paint so as to have an impregnation ratio of 4.7% and drying.
  • Comparative Example 3 corresponds to the case where the acrylic resin and the binder were mixed and applied in Examples 1 to 9.
  • the clean papers of Examples 1 to 9 having an acrylic resin layer and a binder layer are those of Comparative Example 3 having a mixed layer of an acrylic resin and a binder. Compared to clean paper, it has excellent dust generation and blocking properties. In addition, the stiffness and opacity of the clean papers of Examples 1 to 9 are similar to those of Comparative Example 3, and are not inferior.
  • the clean papers of Examples 1 to 9 having the binder layer together with the acrylic resin layer are Comparative Example 1 in which only the acrylic resin layer is present, Comparative Example 2 in which only the binder resin layer is present, and the acrylic paper and binder. It turns out that low dusting property and a blocking characteristic are exhibited with respect to all of the comparative example 3 provided with a mixed layer. Moreover, the clean papers of Examples 1 to 9 are not significantly inferior to Comparative Examples 1 to 3 in both stiffness and opacity, but rather, some of the characteristics thereof are those of Comparative Examples 1 to 3. Is also excellent.

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  • Paper (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention porte sur un papier propre, caractérisé en ce qu'il comprend un papier de base, une couche de résine (méth)acrylique comprenant au moins une résine (méth)acrylique, et une couche de liant comprenant au moins un liant, la couche de liant étant disposée sur la couche de résine (méth)acrylique, et une surface de la couche de liant constituant au moins une partie de la surface du papier propre.
PCT/JP2009/004617 2009-09-15 2009-09-15 Papier propre et son procédé de production WO2011033557A1 (fr)

Priority Applications (2)

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JP2011531635A JP5495073B2 (ja) 2009-09-15 2009-09-15 クリーンペーパー及びその製造方法
PCT/JP2009/004617 WO2011033557A1 (fr) 2009-09-15 2009-09-15 Papier propre et son procédé de production

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WO2011033557A1 true WO2011033557A1 (fr) 2011-03-24

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012041663A (ja) * 2010-08-23 2012-03-01 Tokushu Tokai Seishi Co Ltd クリーンペーパー及びその製造方法
WO2017145974A1 (fr) * 2016-02-22 2017-08-31 日本マタイ株式会社 Matériau amortissant pour protection superficielle, et procédé de fabrication de celui-ci

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0911611A (ja) * 1995-06-30 1997-01-14 Lintec Corp インクジェット用記録用紙
JPH09170198A (ja) * 1995-12-18 1997-06-30 Lintec Corp ガラス用合紙
JP2008190065A (ja) * 2007-02-02 2008-08-21 Kishu Paper Co Ltd 無塵紙
JP2009167546A (ja) * 2008-01-11 2009-07-30 Kishu Paper Co Ltd 無塵紙

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04355183A (ja) * 1991-05-31 1992-12-09 Lintec Corp インクジェット記録用クリーンペーパー

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0911611A (ja) * 1995-06-30 1997-01-14 Lintec Corp インクジェット用記録用紙
JPH09170198A (ja) * 1995-12-18 1997-06-30 Lintec Corp ガラス用合紙
JP2008190065A (ja) * 2007-02-02 2008-08-21 Kishu Paper Co Ltd 無塵紙
JP2009167546A (ja) * 2008-01-11 2009-07-30 Kishu Paper Co Ltd 無塵紙

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012041663A (ja) * 2010-08-23 2012-03-01 Tokushu Tokai Seishi Co Ltd クリーンペーパー及びその製造方法
WO2017145974A1 (fr) * 2016-02-22 2017-08-31 日本マタイ株式会社 Matériau amortissant pour protection superficielle, et procédé de fabrication de celui-ci

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