WO2007083467A1 - Electrophotographic image-receiving material - Google Patents

Electrophotographic image-receiving material Download PDF

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Publication number
WO2007083467A1
WO2007083467A1 PCT/JP2006/325057 JP2006325057W WO2007083467A1 WO 2007083467 A1 WO2007083467 A1 WO 2007083467A1 JP 2006325057 W JP2006325057 W JP 2006325057W WO 2007083467 A1 WO2007083467 A1 WO 2007083467A1
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WO
WIPO (PCT)
Prior art keywords
resin
layer
toner
electrophotographic image
receiving material
Prior art date
Application number
PCT/JP2006/325057
Other languages
French (fr)
Japanese (ja)
Inventor
Katsumasa Yamazaki
Original Assignee
Konica Minolta Holdings, Inc.
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 Konica Minolta Holdings, Inc. filed Critical Konica Minolta Holdings, Inc.
Publication of WO2007083467A1 publication Critical patent/WO2007083467A1/en

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G7/00—Selection of materials for use in image-receiving members, i.e. for reversal by physical contact; Manufacture thereof
    • G03G7/0006—Cover layers for image-receiving members; Strippable coversheets
    • G03G7/002—Organic components thereof
    • G03G7/0026—Organic components thereof being macromolecular
    • 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
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • B32B27/205—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents the fillers creating voids or cavities, e.g. by stretching
    • 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
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • 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
    • B32B29/002—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • 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
    • D21H19/66—Coatings characterised by a special visual effect, e.g. patterned, textured
    • D21H19/70—Coatings characterised by a special visual effect, e.g. patterned, textured with internal voids, e.g. bubble coatings
    • 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
    • D21H21/50—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 form
    • D21H21/56—Foam
    • 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
    • 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
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/304—Insulating
    • 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
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • 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
    • B32B2307/748—Releasability
    • 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
    • B32B2317/00—Animal or vegetable based
    • B32B2317/12—Paper, e.g. 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
    • B32B2398/00—Unspecified macromolecular compounds
    • B32B2398/20—Thermoplastics
    • 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
    • B32B2559/00—Photographic equipment or accessories
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/15—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state
    • B32B37/153—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state at least one layer is extruded and immediately laminated while in semi-molten state

Definitions

  • the present invention relates to a novel electrophotographic image receiving material used for electrophotographic image forming equipment such as copying machines, printers, and facsimile machines.
  • thermoplastic resin layer on a highly smooth paper support provided with a polyolefin resin coating layer on both sides of the base paper.
  • Patent Document 3 a method for improving gloss and other photographic feelings by providing a thermoplastic resin layer on a highly smooth paper support provided with a polyolefin resin coating layer on both sides of the base paper.
  • Patent Document 2 Japanese Patent Laid-Open No. 2003-322993
  • Patent Document 3 Japanese Patent Laid-Open No. 2000-66466
  • the present invention has been made in view of the above problems, and an object thereof is to obtain a photo-like high-gloss print by an electrophotographic process and to be excellent in releasability from a fixing roller and a fixing belt. Another object of the present invention is to provide an electrophotographic image-receiving material that can produce a print without undulations and that does not generate a paper prestor even when it is fixed at a high temperature.
  • An electrophotographic image receiving material comprising a toner receiving layer containing at least one layer of thermoplastic resin on the top of the electrophotographic image receiving material.
  • thermoplastic resin constituting the resin coating layer is at least one selected from polyethylene, polypropylene, polymethylpentene, and a polyester cartridge. Electrophotographic image receiving material.
  • thermoplastic resin constituting the resin coating layer is a polyethylene resin, and the polyethylene resin contains 50% by mass or more of high-density polyethylene.
  • the electrophotographic image-receiving material according to 1 or 2.
  • a resin coating layer provided on the surface of the paper support opposite to the surface having the toner receiving layer
  • A contains 50% by mass or more of high-density polyethylene
  • the resin coating layer B provided on the surface of the paper support having the toner-receiving layer contains 80% by mass or more of low-density polyethylene. 5.
  • a photo-like glossy print can be obtained, excellent releasability from the fixing roller and the fixing belt, no occurrence of wavy prints, and generation of paper blisters at high temperature fixing. It was possible to provide an electrophotographic image-receiving material free from the above.
  • a paper support having a resin coating layer made of thermoplastic resin formed by melt extrusion coating on both sides of a paper substrate.
  • An electrophotographic image receiving material comprising a heat insulating layer having voids on at least one surface of a body, and a toner receiving layer containing at least one thermoplastic resin on the heat insulating layer. It is possible to obtain an electrophotographic image-receiving material that has excellent glossiness, has excellent releasability from the fixing roller and fixing belt, does not generate wavy prints, and does not generate paper blisters at high-temperature fixing. It is up to the headline and the present invention.
  • a heat insulating layer having voids is provided on a paper support having a resin coating layer, and a toner receiving layer having high compatibility with toner is provided on the top.
  • paper blisters which are a serious problem in a paper support on which a resin coating layer is provided, have a heat insulating effect due to a heat-insulating layer and high adhesion between the base paper and the resin coating layer by melt extrusion coating. It was possible to greatly improve blisters.
  • the paper support according to the present invention is a double-sided coating in which a resin coating layer made of thermoplastic resin is formed on both the front and back surfaces of a sheet-like paper substrate (also referred to as a base paper) by a melt extrusion coating method.
  • a resin-coated paper sheet is a double-sided coating in which a resin coating layer made of thermoplastic resin is formed on both the front and back surfaces of a sheet-like paper substrate (also referred to as a base paper) by a melt extrusion coating method.
  • a resin-coated paper sheet is a double-sided coating in which a resin coating layer made of thermoplastic resin is formed on both the front and back surfaces of a sheet-like paper substrate (also referred to as a base paper) by a melt extrusion coating method.
  • the base paper used for the paper support according to the present invention may be a natural pulp as a component, or may be a synthetic pulp or synthetic fiber, or a mixture thereof.
  • natural pulp paper mainly composed of wood pulp of softwood straw pulp, hardwood straw pulp, and softwood hardwood mixed pulp is preferably used.
  • These base papers can contain various high molecular compounds and additives. For example, a dry low strength agent, a sizing agent, a pigment, a wet paper strength enhancer, a fixing agent, a pH adjuster and the like can be appropriately combined.
  • the basis weight of the base paper is not particularly limited, but the basis weight is preferably 50 gZm 2 to 200 gZm 2. Also, the density is not particularly limited, but usually 0.90 to L: 15 g / cm 3 Is preferred.
  • a thermoplastic resin that is capable of using a general-purpose thermoplastic resin such as polyethylene, polypropylene, polymethylpentene, polyethylene terephthalate, and the like, which is also selected.
  • the soft point of the thermoplastic resin for coating is that the fixing temperature of the fixing roller is effectively insulated by a heat insulating layer having voids, so that the soft point of the thermoplastic resin is 90 ° C or higher. Forces that can be used in the case of cocoa resin It is preferable that 50% by mass or more of thermoplastic resin having a soft softness point of 120 ° C or higher is contained, more preferably 50% by mass or more and 100% by mass or less. . Note that the soft saddle point in the present invention indicates the Vicat softening point.
  • the thickness of the resin coating layer of the thermoplastic resin provided on the front and back surfaces is not particularly limited, but a range of 5 to 100 m is generally a viewpoint power for producing a paper support. .
  • thermoplastic resin In melt extrusion coating, it is preferable to use polyethylene as the thermoplastic resin from the viewpoints of adhesion to the base paper, suitability for production, and low cost of the resin.
  • polyethylene due to the difference in density, 1) density of 0.910 gZcm 3 or more, less than 930 gZcm 3 is low density polyethylene (LDPE), 2) density is 930 gZcm 3 or more, 0.9942 gZcm 3 Less than medium density polyethylene (MDPE), 3) density 0.9942 gZcm 3 or more is classified as high density polyethylene (HDPE), but when polyethylene resin is used for the resin coating layer of the paper support according to the present invention. polyethylene ⁇ is preferred, including the density 0. 942gZcm 3 or more high-density polyethylene 50 weight 0/0.
  • LDPE low density polyethylene
  • MDPE medium density polyethylene
  • HDPE high density polyethylene
  • the resin coating layer B provided on the surface having the toner receiving layer of the paper support contains 80% by mass or more of low density polyethylene having a density of less than 0.930 gZcm 3.
  • the coating amount of the resin coating layer B is preferably 30 g / m 2 or more, and the paper blister resistance is also preferable.
  • the resin coating layer according to the present invention may contain a color pigment, a lubricant, an antioxidant and the like.
  • the paper support according to the present invention is produced by melt extrusion coating a resin composition comprising thermoplastic resin on a base paper in the form of a slit die force film.
  • the melt extrusion temperature is preferably 200 ° C. to 350 ° C.
  • the slit die is preferably a T-type die, an L-type die, or a Fitztil type die.
  • corona discharge treatment, flame treatment on the base paper before coating operation The adhesion between the base paper and the resin coating layer may be improved by applying an active resin treatment such as the above, or by spraying ozone gas onto the surface of the heated and melted resin film to activate it.
  • the thickness of the paper support is usually 80 to 300 ⁇ m. Further, the rigidity and smoothness of the paper support can be appropriately selected according to the purpose for which there is no particular limitation.
  • one or both surfaces of the paper support according to the present invention can be subjected to various surface treatments and undercoating treatments for the purpose of improving the adhesion with a layer provided thereon.
  • the surface treatment include glossy surface, fine surface described in JP-A-55-26507, mat surface or silk surface molding treatment, corona discharge treatment, flame treatment, glow discharge treatment, plasma treatment, etc. An activation process etc. are mentioned.
  • the undercoating treatment include the method described in JP-A No. 61-846443. These treatments may be performed alone, or may be subjected to an activation treatment after the above-described molding treatment or the like, or may be subjected to a primer treatment after a surface treatment such as an activation treatment. Each of these means can be arbitrarily combined.
  • a hydrophilic resin on the front or back surface of the paper support, or a combination thereof, a hydrophilic resin, a semiconductive metal oxide such as alumina sol or tin oxide, carbon black, or other You can also apply an antistatic agent.
  • the electrophotographic image-receiving material of the present invention is characterized by having a heat-insulating layer having voids between the paper support and the toner-receiving layer, and is a heat-insulating layer having a high porosity (void capacity). preferable.
  • the thermal energy applied by the fixing roller at the time of fixing is blocked from diffusing, and the high temperature state of the toner receiving layer is maintained.
  • paper blisters can be prevented from occurring.
  • the toner is highly melted with the efficiency of fixing heat to promote the bleed-out of the wax in the toner, thereby improving the releasability between the fixing heating part consisting of the fixing roller and the fixing belt and the toner. It has become a force to improve.
  • the porosity of the heat insulating layer according to the present invention may be 30% or more, but 40% or more. It is particularly preferable that it is 50% or more and 80% or less.
  • a material for forming the heat insulating layer having a high porosity defined in the present invention a material in which foamed plastic, hollow particles or porous particles are dispersed in a resin layer is used.
  • Foamable plastic is a hollow plastic filler containing a heat-fusible substance as a shell and containing a low-boiling solvent inside, and foams when heated.
  • thermoplastic resin used as the shell of the plastic filler include polystyrene, polyvinyl chloride, polysalt / vinylidene, poly (vinyl acetate), poly (acrylic acid ester), poly (acrylic-tolyl), poly (butadiene), and copolymers thereof. Is mentioned.
  • foaming agents contained in the shell include propane, isobutane, neopentane, and petroleum ether. For example, there are Micropal manufactured by Matsumoto Yushi and Expancel manufactured by Kemanode.
  • micro hollow bodies formed of various materials such as glass, ceramics, and plastics.
  • glass micro hollow bodies borosilicate glass microspheres, for example, manufactured by Grapabell Microsel M and aluminosilicate micro hollow bodies include premixes for low foam injection molding and standard injection molding, for example, Fillite manufactured by Nippon Philite.
  • thermally expandable hollow particles are hollow particles whose wall material is a thermoplastic material such as vinylidene chloride-acrylonitrile copolymer, and contain thermally expandable gases such as propane, n-butane, and isobutane. It is a substance that has.
  • Non-expandable hollow particles are polymers in which a resin such as styrene-acrylic is used as a wall material, water is contained inside, and water evaporates during drying to form hollow particles.
  • the hollow particles as described above generally have a force having a particle size of about 0.1 to: LOO / zm.
  • the hollow particles used in the present invention have a particle size of 0.2 to: LO / zm force More preferably, it is 0.3-5 / ⁇ ⁇ . If it is less than 0., sufficient heat insulating effect as a hollow particle cannot be obtained, and if it exceeds 10 m, the smoothness deteriorates remarkably.
  • the heat insulating layer according to the present invention is preferably formed of non-expandable hollow particles.
  • the binder for holding the heat insulating layer is not particularly limited.
  • styrene Emulsion types such as butadiene rubber, styrene-methyl methacrylate-butadiene rubber, acrylic resin, acrylic-styrene resin, acrylic-maleic acid resin, acrylic monoacetate resin, ethylenic acid resin resin, etc.
  • a binder capable of reversible sol-gel conversion is preferred, including synthetic resins, water-soluble polymers such as polybulal alcohol, starch, casein, and gelatin, carboxy'methylcellulose, and polyethylene oxide.
  • binder that reversibly converts to sol-gel examples include gelatin, dielan gum, color ginnan, agar, pectin, and the like, and gelatin is more preferable.
  • the thickness of the heat insulating layer according to the present invention is generally 20 ⁇ m, preferably 30 ⁇ m or more, more preferably 30 m or more and 60 m or less.
  • the toner receiving layer according to the present invention is composed of a thermoplastic resin.
  • thermoplastic resin applicable to the toner receiving layer according to the present invention examples include the following thermoplastic resins.
  • polyolefin resin such as polyethylene resin and polypropylene resin, copolymer resin of olefins such as ethylene propylene and other bulur monomers, acrylic resin, etc. Having a bond
  • dicarboxylic acid components such as terephthalic acid, isophthalic acid, maleic acid, fumaric acid, phthalic acid, adipic acid, sebacic acid, azelaic acid, abietic acid, succinic acid, trimellitic acid, pyromellitic acid (these dicarboxylic acid components May be substituted with a sulfonic acid group, a carboxyl group, etc.) and ethylene glycol, diethylene glycol, propylene glycol, bisphenol A, diether derivatives of bisphenol A (for example, ethylene oxide 2 of bisphenol A) Alcohol components such as carbonate, bisphenol A propylene oxide 2), bisphenol S, 2-ethylcyclohexyldimethanol, neopentylglycol, cyclohexyldimethanol, glycerin and the like (these alcohols) Hydroxyl component Polyester resins, polymethyl methacrylate, polybutyl methacrylate, polymethyl acrylate,
  • polymethacrylic acid ester Fats polycarbonate resin, polyacetic acid resin resin, styrene acrylate resin resin, styrene-methacrylate copolymer resin, butyl toluene acrylate resin resin.
  • Specific examples include those described in JP-A Nos. 59-101395, 63-7971, 63-7972, 63-7973, and 60-294862.
  • thermoplastic resin may be used alone or in combination of two or more of these thermoplastic resins.
  • the thickness of the toner receiving layer which may be a single layer or may be composed of two or more layers, is generally 0.1 to 50 ⁇ m, preferably 0.5. ⁇ 20 ⁇ m.
  • the glass transition point of the thermoplastic resin used in the toner receiving layer according to the present invention is 0 ° C or higher, preferably 20 ° C or higher, and the thermal conductivity is 0.3 WZm'K or lower. It is preferable.
  • the thermal conductivity of thermoplastic resin is, for example, “New edition plastic material reader” (Industry Research Committee, April 1, 1993, published 4 edition of new edition), “Plastic molding data book” (Nikkan Kogyo Shin, Showa 63 The first edition of the first edition published in March, 2000) and the “Plastics' Data Book” (Industry Research Committee, first edition issued in December 1999) can be used.
  • the thermoplastic resin used in the toner receiving layer according to the present invention it is possible to select the resin having high compatibility with the binder resin that constitutes the toner to be received. To preferred.
  • compatible with the toner binder resin in the present invention means that in the image after fixing, the thermoplastic resin of the toner receiving layer and the toner binder resin do not form a boundary. Means that.
  • a method of evaluating the compatibility of the toner with the binder resin for example, a method of measuring using the solubility parameter described in JP-A-2-263642 is described. As a more appropriate evaluation method, a melting method is described. A method for measuring the toner inclination angle can be mentioned.
  • a toner receiving layer composed of a thermoplastic resin set to a predetermined temperature is brought into intimate contact with the toner disk, and the toner disk is measured. Is melted and then rapidly cooled and solidified.
  • this contact angle measuring device manufactured by Kyowa Interface Chemical Co., Ltd. measure the angle of the bottom of the toner after the toner is solidified, and use the average value as the molten toner inclination angle.
  • thermoplastic resin When a thermoplastic resin is selected from the viewpoint of the molten toner inclination angle, it is preferable to use a resin having a toner inclination angle of 40 degrees or less between the toner used for color image formation and the thermoplastic resin.
  • Transparent resin layers with a melt toner tilt angle of 40 degrees or less include polyester resin, styrene acrylic ester resin, epoxy resin, polyurethane resin, methyl methacrylate resin, vinyl chloride resin, Mention may be made of thermoplastic resins such as vinyl chloride-vinyl acetate copolymers. Particularly preferred is the same type of resin as the main resin of the toner (a resin containing 50% by mass or more based on the binder resin).
  • the toner main resin is a polyester resin
  • a polyester resin is used as the thermoplastic resin of the toner receiving layer
  • the toner resin is a styrene-acrylic ester resin
  • the toner receiving layer heat resin is used. It is preferable to use acrylic resin or styrene-acrylic ester resin as the plastic resin.
  • the toner receiving layer according to the present invention preferably contains a wax.
  • the wax can be appropriately selected according to the purpose without particular limitation, for example, Examples include petroleum wax, modified wax, hydrogenated wax, vegetable wax, animal wax, mineral wax, and synthetic hydrocarbon.
  • Examples of petroleum waxes include paraffin wax, microcrystalline wax, petrolatum, Fischer-Tropsch wax, acid amide compounds, and acid imido compounds.
  • modified wax examples include ammine-modified polypropylene, acrylic acid-modified, fluorine-modified, olefin-modified wax, urethane-type wax, and alcohol-type wax.
  • Examples of the hydrogenated wax include hydrogenated castor oil, castor oil derivatives, stearic acid, lauric acid, myristic acid, palmitic acid, behenic acid, sebacic acid, undecylenic acid, maleic acid, and high-grade maleic oil. And synthetic waxes such as blown oil and cyclopentadiene oil.
  • plant-based waxes examples include carnauba wax, castor oil, rapeseed oil, soybean oil, wax, cotton wax, rice wax, sugarcane wax, candelilla wax, Japan wax, and jojoba oil.
  • animal waxes include beeswax, lanolin, whale pod, stew (whale oil), and wool cocoon.
  • Examples of the mineral wax include natural waxes such as ozokerite and ceresin, and fatty acid esters such as montanoic ester wax.
  • Examples of the synthetic hydrocarbon include an acid amide compound or an acid imide compound such as polyethylene wax, polypropylene wax, and Fischer port push wax.
  • carnauba wax, fatty acid ester wax, paraffin wax, acid amide compound and the like are preferable.
  • the amount of the wax used in the present invention is a force depending on the type of the wax.
  • the amount of the wax is 1 to 20% by mass, preferably 2 to 15% by mass with respect to the mass of the toner receiving layer.
  • the method of adding the wax to the toner receiving layer is not particularly limited, but a method of adding a liquid obtained by heating and melting the wax, or a water dispersion emulsion in which the wax is finely dispersed. There is a method of adding selenium.
  • additives can be used in the toner image-receiving layer or heat insulating layer according to the present invention for the purpose of improving the thermodynamic characteristics.
  • a force that can be appropriately selected depending on the purpose, for example, a plasticizer, a filler, a cross-linking agent, a charge control agent, a conductive agent, a pigment, a surfactant, a dye, humidity control Agents, matting agents and the like.
  • the plasticizer has a function of adjusting the flow or softening of the toner receiving layer by heat or pressure when fixing the toner.
  • Plasticizers include “Chemical Handbook” (edited by the Japan Chemical Society, Maruzen), “Plasticizers Theory and Application 1” (edited by Koichi Murai, Koshobo), “Research on Plasticizers”, “Research on Plasticizers” “Lower” (edited by Polymer Chemistry Association) and “Handbook rubber 'plastic compounded chemical” (edited by Rubber Digest Co., Ltd.).
  • filler publicly known reinforcing agents for fillers, fillers, and reinforcing materials can be used, and organic and inorganic fillers are preferable.
  • Select fillers with reference to "Handbook Rubber'Plastic Compounded Chemicals” (edited by Rubber Digest Co., Ltd.), “New Edition Plastic Compounding Basics and Applications” (Taiseisha), “Fila I Handbook” (Taisei Co., Ltd.), etc. be able to.
  • Examples of the crosslinking agent include compounds having two or more known reactive groups in the molecule, such as epoxy groups, isocyanate groups, aldehyde groups, active halogen groups, active methylene groups, acetylene groups, and the like as reactive groups. In addition, a compound having two or more groups capable of forming a bond by a hydrogen bond, an ionic bond, a coordination bond, or the like is also included.
  • Examples of the crosslinking agent include known compounds such as a coupling agent for resin, a curing agent, a polymerization agent, a polymerization accelerator, a coagulant, a film forming agent, and a film forming aid.
  • the charge adjusting agent can be used for the purpose of adjusting toner transfer, adhesion, etc., and preventing charging adhesion of electrophotographic receiving paper.
  • the charge control agent conventionally known antistatic agents and charge control agents can be used, and surface active agents such as cationic surfactants, anionic surfactants, amphoteric surfactants, nonionic surfactants, etc.
  • surface active agents such as cationic surfactants, anionic surfactants, amphoteric surfactants, nonionic surfactants, etc.
  • polymer electrolytes, conductive metal oxides, and the like can be used.
  • the conductive agent include ZnO, TiO, SnO, AlO, InO, SiO, MgO, BaO, and MoO.
  • metal oxides These may be used alone or in combination of two or more.
  • Examples of the pigment include fluorescent whitening agents, white pigments, colored pigments, dyes and the like for the purpose of improving image quality, particularly whiteness.
  • the fluorescent brightening agent is a compound that has absorption in the near ultraviolet region and emits fluorescence at 400 to 500 nm.
  • Examples of the fluorescent brightener include stilbene compounds, coumarin compounds, biphenyl compounds, benzoxazoline compounds, naphthalimide compounds, pyrazoline compounds, carbostyryl compounds, and the like.
  • Various known dyes can be used as the dye, and examples thereof include oil-soluble dyes.
  • oil-soluble dyes include anthraquinone compounds and azo compounds.
  • the whiteness of the toner-receiving layer according to the present invention is not particularly limited, and it is preferable that the whiteness of the toner-receiving layer is high enough to be appropriately selected according to the purpose.
  • the whiteness in the CIE 1976 (L * a * b *) color space, an L * value of 80 or more is preferred, 85 or more is more preferred, and 90 or more is particularly preferred.
  • the white color is preferably as neutral as possible.
  • the value power of (a *) 2 + (b *) 2 is preferably 50 or less, more preferably 18 or less, and particularly preferably 5 or less.
  • the smoothness of the toner-receiving layer according to the present invention is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably higher. Further, the smoothness is not particularly limited and can be appropriately selected according to the purpose, but is preferably higher.
  • the arithmetic average roughness (Ra) is preferably 3 ⁇ m or less, preferably 1 ⁇ m or less, in all areas up to the maximum density of black even with white power without toner. It is particularly preferably 0.5 m or less.
  • the arithmetic average roughness can be measured based on JIS B 0601, JIS B 0651, and JIS B 0652.
  • the surface electrical resistance in the toner receiving layer according to the present invention is preferably 1 ⁇ 10 6 to 1 ⁇ 10 15 ⁇ (25 ° C., 65% RH condition).
  • the surface electrical resistance of other layers other than the receiving layer is also 1 X 10 6 to 1 X 10 15 ⁇ (25 ° C, 65% RH) It is preferable.
  • a matting agent can be added to the toner receiving layer according to the present invention.
  • the matting agent can be appropriately selected according to the purpose for which there is no particular limitation, and examples thereof include solid particles.
  • the solid particles can be classified into inorganic particles and organic particles.
  • the electrophotographic image receiving material of the present invention in addition to the toner receiving layer and the heat insulating layer described above, other constituent layers can be provided.
  • Other constituent layers are not particularly limited and may be appropriately selected depending on the intended purpose.For example, surface protective layers, intermediate layers, undercoat layers, cushion layers, charge control (prevention) layers, reflective layers, colors Examples include a taste preparation layer, a storage stability improving layer, an adhesion prevention layer, an anti-curl layer, and a smooth wrinkle layer. These may have a single layer structure or a laminated structure.
  • the support is a reflective support and is a reflective electrophotographic image receiving material in which the toner receiving layer according to the present invention is provided on the support, each layer provided on the support must be transparent. Rather it is preferably white.
  • the opacity of the electrophotographic image-receiving material of the present invention is preferably 90% or more, preferably 85% or more, measured by the method specified in JIS P 8138.
  • a back layer can be provided on the side of the support opposite to the side on which the image receiving layer is provided. Further, the back layer may have the same configuration as the image receiving layer side in order to improve the double-sided output suitability.
  • the above-mentioned various additives can be used, and it is particularly preferable to use the above-mentioned matting agent, slip agent, charge adjusting agent and the like.
  • the knock layer may be a single layer or two or more layers.
  • releasable oil is used for the fixing roller, etc., to prevent offset during fixing, it is preferable to have oil absorption on the back side.
  • an adhesion improving layer can be provided for the purpose of improving adhesion between the support, the heat insulating layer, the toner receiving layer and the other constituent layers.
  • additives can be used in the electrophotographic image-receiving material of the present invention for the purpose of improving the stability of the output image and improving the stability of the image-receiving layer itself.
  • Such additives include seeds Examples include various known antioxidants, anti-aging agents, ultraviolet absorbers, light stabilizers, deterioration inhibitors, ozone deterioration inhibitors, antiseptics, and antifungal agents.
  • the electrophotographic image-receiving paper of the present invention can be used for image formation with an electrophotographic toner by an electrophotographic system, and can be suitably used for color image formation with an electrophotographic color toner.
  • the toner used in the present invention is not particularly limited as long as it is a known electrophotographic toner, and the toner production method is not particularly limited as long as it is a known production method such as a pulverization method or a polymerization method.
  • the monomer is emulsion-polymerized in a suspension polymerization method or in a liquid to which a necessary additive emulsion is added to produce fine polymer particles, and then organic A production method in which a solvent, a flocculant and the like are added to associate is preferable.
  • association means that a plurality of the resin particles and the colorant particles are fused.
  • the production method of the suspension polymerization method is not particularly limited, but the following production method can be raised.
  • various constituent materials such as a colorant and, if necessary, a release agent, a charge control agent, and a polymerization initiator are added to the polymerizable monomer, and a homogenizer, sand mill, sand grinder, ultrasonic wave is added. Dissolve various constituent materials in the polymerizable monomer using a disperser. These various constituent materials are dissolved! In the soot, the dispersed polymerizable monomer is dispersed in oil droplets of a desired size as a toner in an aqueous medium containing a dispersion stabilizer using a homomixer or a homogenizer.
  • the stirring mechanism is transferred to the above-described reaction apparatus which is a stirring blade, and the polymerization reaction is advanced by heating. After completion of the reaction, the dispersion stabilizer is removed, filtered, washed, and further dried to prepare the toner of the present invention.
  • a method for producing the toner according to the present invention a method in which the resin particles are prepared by fusing in an aqueous medium can also be mentioned.
  • This method is not particularly limited.
  • the method shown in the publication of 9-15904 can be mentioned.
  • dispersed particles of constituent materials such as rosin particles and coloring agents, or a certain method of associating a plurality of fine particles composed of rosin and coloring agents, in particular after dispersing these in water using an emulsifier
  • an organic solvent which is infinitely soluble in water may be added simultaneously with the flocculant.
  • the resin component of the toner a power capable of using a known resin, in general, polyester resin, styrene-acrylic resin, etc. can be mainly used.
  • a resin having high compatibility with a resin component such as an adhesive contained in the coating layer is preferable to select a resin having high compatibility with a resin component such as an adhesive contained in the coating layer as the resin component of the toner.
  • the resin component of toner includes one or more of polyester resin, styrene monoacrylate ester resin, styrene-methacrylate ester resin, etc. depending on the purpose. It is preferred to use a mixture of
  • the volume average particle diameter of the toner is preferably in the range of 2 to 10 ⁇ m, more preferably in the range of 3 to 9 ⁇ m. If the volume average particle size of the toner is less than the charge average, the chargeability becomes insufficient and the developability tends to be lowered. On the other hand, if it exceeds, the resolution of the image may be lowered. It is not preferable.
  • this white base paper b On the back side of this white base paper b, a medium density polyethylene with a density of 0.935 gZcm 3 and a soft melting point of 110 ° C was melt-extruded at 300 ° C as a backside resin layer, and 25 g / m 2 The back surface of the resin layer was coated with a resin layer.
  • a high-density polyethylene with a density of 0.965 gZcm 3 and a soft scoring point of 133 ° C was melt-extruded at 300 ° C as a backside resin layer, and the back side was 25 g / m 2 The greaves layer was coated.
  • a high-density polyethylene with a density of 0.965 g / cm 3 and a softening point of 133 ° C was melt-extruded at 300 ° C as a backside resin layer, and the back side of 25 g / m 2 The greaves layer was coated.
  • a high-density polyethylene with a density of 0.955 g / cm 3 and a softening point of 126 ° C was melt-extruded at 300 ° C as a backside resin layer, and a backside of 25 g / m 2 The greaves layer was coated.
  • a high-density polyethylene resin with a density of 0.9952 g / cm 3 and a softening point of 124 ° C is first 20 g / m 2 on the back side and then 25 g / m 2 on the front side.
  • the density is 0.
  • High density polyethylene with a softening point of 126 ° C was melt extrusion coated at 300 ° C to coat a 30 g / m 2 backside resin layer.
  • the density is 0.
  • Medium density polyethylene with a softening point of 126 ° C was melt extruded at 300 ° C to coat a 35 g / m 2 backside resin layer.
  • a polypropylene resin with a density of 0.915 g / cm 3 and a soft scoring point of 150 ° C first 20 g / m 2 on the back side and then 25 g / m 2 on the front side.
  • melt extrusion coating at 300 ° C was subjected to melt extrusion coating at 300 ° C to prepare a paper support J having a polypropylene resin coating layer on both sides.
  • the front and back of the white base paper b density 1. 390 g / cm 3, a polyethylene terephthalate phthalate ⁇ of ⁇ I ⁇ 250 ° C, respectively first 20GZm 2 on the back side, then the surface side 25GZm 2 to 32
  • a melt-extrusion coating was performed at 320 ° C, and a paper support L having a polymethylpentene resin coating layer on both sides was produced.
  • the toner receiving layer a made of thermoplastic resin is applied, and the following toner receiving layer a coating solution is applied to the wire bar.
  • the sample 101 was prepared by coating and drying so that the film thickness after drying was 15 111.
  • Polyester aqueous dispersion (Toyobo Vylonal MD-1100, solid content 30%)
  • an anchor layer a made of gelatin was applied under the condition that the dry film thickness was 0.1 ⁇ m.
  • the toner receiving layer a coating solution was applied under the same conditions and dried to prepare Sample 102.
  • the anchor layer a made of gelatin is applied under the condition that the dry film thickness is 0.
  • Heat insulation layer having hollow particle force aSample 103 was prepared by applying and drying the coating solution with a wire bar so that the average film thickness after drying was 30 m.
  • the porosity of the heat insulating layer a was 63%.
  • the anchor layer a made of gelatin is applied under the condition that the dry film thickness is 0. a After applying and drying with a wire bar so that the average film thickness after drying is 30 m using a coating liquid, the toner receiving layer consisting of the following acrylic resin b The average film thickness after drying is applied A sample 104 was prepared by coating with a wire bar and drying to 5 m.
  • Acrylic rosin aqueous solution (NichigoMolvinylMolvinyl 743, solid content 43%) 40%
  • the anchor layer a made of gelatin is applied under the condition that the dry film thickness is 0. a After applying and drying with a wire bar so that the average film thickness after drying is 30 m using the coating liquid, the toner receiving layer consisting of the following acrylic resin c The average film thickness after drying the coating liquid The sample 105 was prepared by coating with a wire bar and drying so as to be 5 m.
  • Dioctyl sodium sulfosuccinate aqueous solution solid concentration 1%) 15% Carnauba wax Emulsion aqueous solution (manufactured by Chukyo Yushi ⁇ Cerosol 524, active ingredient concentration 30%) 10%
  • Sample 106 to Sample 115 were prepared in the same manner as Sample 105 except that the paper support B was changed to each paper support shown in Table 1.
  • an anchor layer a having a gelatin strength is applied under the condition of a dry film thickness of 0: m, and the following hollow particle force is also applied.
  • the coating layer is coated with a wire bar so that the average film thickness after drying is 35 m, dried, and then the toner-receiving layer made of the above acrylic resin c
  • the average film after drying the coating liquid Sample 116 was prepared by coating with a wire bar and drying to a thickness of 5 ⁇ m.
  • the porosity of the heat insulating layer b was 56%.
  • sample 116 In the preparation of the sample 116, the paper support D was changed to the paper supports G and H, respectively. Sample 117 and sample 118 were produced in the same manner except for the above.
  • an anchor layer a having a gelatin strength is applied under the condition of a dry film thickness of 0: m, and the following hollow particle force is also applied.
  • Heat-insulating layer c The coating liquid is applied with a wire bar so that the average film thickness after drying is 35 m, dried, and then the toner-receiving layer consisting of the acrylic resin c
  • the average film after drying the coating liquid Sample 119 was prepared by coating with a wire bar and drying to a thickness of 5 m.
  • the porosity of the heat insulating layer c was 50%.
  • an anchor layer a having a gelatin strength is applied under the condition of a dry film thickness of 0: m, and the following hollow particle force is also applied.
  • Heat-insulating layer d Apply the coating liquid with a wire bar so that the average film thickness after drying is 25 m, and then dry the toner-receiving layer made of the acrylic resin c Average film after drying the coating liquid Sample 120 was prepared by coating with a wire bar and drying to a thickness of 5 m.
  • Spherical porous silica particles (Fuji Silysia Chemical's Pyrosphere 1501) 20% Alkali-treated gelatin 5%
  • the gelatin layer anchor layer a is applied under the condition that the dry film thickness is 0.
  • Heat-insulating layer a Using the coating solution, coat with a wire bar so that the average film thickness after drying is 30 m, dry, and then dry the toner-receiving layer consisting of the following acrylic resin d coating solution Sample 121 was prepared by coating with a wire bar and drying so that the average film thickness was 7 m.
  • Acrylic rosin aqueous solution (NichigoMolvinylMolvinyl 743, solid content 43%) 40%
  • Dioctyl sodium sulfosuccinate aqueous solution solid concentration 1%) 15% Montanate ester wax Emulsion aqueous solution (Chukyo Oil & Chemicals-206, active ingredient concentration 30%) 10%
  • Sample 121 was produced in the same manner as in Sample 121 except that paper support D was changed to paper support H.
  • the gelatin layer anchor layer a is applied under the condition that the dry film thickness is 0.
  • Heat-insulating layer a Using a coating solution, coat with a wire bar so that the average film thickness after drying is 30 m, and then dry the toner-receiving layer consisting of the following acrylic resin.
  • Sample 123 was prepared by coating with a wire bar and drying so that the average film thickness of the film became 7 m.
  • Dioctyl sodium sulfosuccinate aqueous solution solid concentration 1%) 15% Polyethylene wax Emulsion aqueous solution (Polylon L 788 made by Chukyo Yushi), active ingredient concentration 31%) 10%
  • the gelatin layer anchor layer a is applied under the condition that the dry film thickness is 0.
  • Heat-insulating layer a Apply with a wire bar using a coating solution so that the average film thickness after drying is 30 m, and then dry the toner receiving layer consisting of the following acrylic resin after drying the coating solution
  • Sample 124 was prepared by coating with a wire bar and drying so that the average film thickness of the film was 10 m.
  • Dioctyl ⁇ sodium sulfosuccinate aqueous solution solid concentration 1%) 15% stearamide ⁇ emulsion aqueous solution (Nokyo micron L-271, Chukyo Yushi Co., active ingredient concentration 25%) 12%
  • the sample 124 was prepared in the same manner except that the paper support D was changed to the paper support G. Thus, a sample 125 was produced.
  • the following anchor layer b is applied under the condition that the dry film thickness is 0: m, and then the above hollow particle force is applied.
  • Heat-insulating layer a Using a coating solution, coat with a wire bar so that the average film thickness after drying is 30 m, dry, and then dry the toner-receiving layer c consisting of the above acrylic resin after drying Sample 126 was prepared by coating with a wire bar and drying so that the average film thickness of the film became 5 m.
  • Acrylic rosin aqueous solution (NichigoMolevinyl Ltd.Movinyl 745, solid concentration 38%) 40%
  • the modified magicolor2430DL fixing conditions are as follows: the fixing temperature of the heating roller is 200 ° C, the fixing speed is 50 mmZsec, and each electrophotographic image-receiving material is untoned. Pass through 100 postcards in the transferred size, visually observe the degree of occurrence of paper blisters, and evaluate paper blister resistance according to the following criteria: o
  • the rank is A or B, it can be judged that it is effective as an electrophotographic image receiving material, and if it is C or D, it is judged that it cannot be used as a high performance electrophotographic image receiving material.
  • the modified magicol2430DL was fixed on a single roller at a fixing temperature of a heating roller of 190 ° C and a fixing speed of 30mmZsec. The state of this was visually observed, and the resistance to undulation was evaluated according to the following criteria.
  • the modified magicolor2430DL was fixed on a heating roller with a fixing temperature of 220 ° C, with a fixing speed of 120mmZsec.
  • the releasability from the heating roller was evaluated by passing sheets. If the releasability from the heating roller is poor, paper conveyance will be hindered and paper passing will not be possible.
  • Table 1 shows the results obtained as described above.
  • the electrophotographic image-receiving material of the present invention has a high glossiness with respect to the comparative example, and is excellent in releasability from the fixing roller and fixing belt. It is excellent in that it is excellent in resistance to paper blisters even at high temperature fixing, which is not a problem with printing ripples.

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Abstract

An electrophotographic image-receiving material for use in an electrophotographic process. It gives a photo-like print having a high gloss and has excellent releasability from a fixing roller and fixing belt to give a print which is not wavy. Even when fixing is conducted at a high temperature, the image-receiving material suffers no paper blistering. This electrophotographic image-receiving material is characterized by comprising: a paper support comprising a paper base and a thermoplastic-resin coating layer formed on each side of the base by melt extrusion coating; a heat-insulating layer having voids which has been formed on at least one side of the paper support; and at least one toner-receiving layer which comprises a thermoplastic resin and has been formed over the heat-insulating layer.

Description

電子写真受像材料  Electrophotographic image receiving material
技術分野  Technical field
[0001] 本発明は、複写機、プリンター、フアキシミリ等の電子写真方式の画像形成機器に 用いられる新規の電子写真受像材料に関するものである。  The present invention relates to a novel electrophotographic image receiving material used for electrophotographic image forming equipment such as copying machines, printers, and facsimile machines.
背景技術  Background art
[0002] 現在、オフィス等では、電子写真方式を用いた画像形成機器が広く普及して!/ヽる。  [0002] Currently, in offices and the like, image forming apparatuses using an electrophotographic method are widely spread!
この電子写真方式による画像形成機器には通常普通紙が使われてきたが、電子写 真方式による多色画像やフルカラー画像形成方法の普及、発展に伴って、高画質な フルカラー画像を形成する電子写真用受像紙の開発が行われてきている。  Normally, plain paper has been used in this electrophotographic image forming device, but with the spread and development of multicolor images and full-color image forming methods using the electrophotographic method, electronic paper that forms high-quality full-color images is used. Photographic paper has been developed.
[0003] 近年では、銀塩写真プリントやインクジェット出力プリント並のフォトライクなプリント の要望が強くなつてきているが、電子写真方式によるカラー出力画像は、前者のよう な写真画像プリントに比較し、未だ満足の 、く品質にまでは至って 、な 、のが現状で ある。  [0003] In recent years, there has been a growing demand for photo-like prints comparable to silver halide photographic prints and inkjet output prints. However, color output images by electrophotography are compared to photographic image prints like the former, The current situation is that the quality is still satisfactory.
[0004] これら電子写真方式で形成したカラープリントでは、数 μ mオーダーのトナーを画 像形成要素として使用しているため、光沢に乏しぐトナーの付与量にも限界があり、 写真画像を達成するために必要な濃度を実現できて 、な 、のが現状であり、フォトラ イクの画像出力にはこれらの改善が強く望まれて 、る。  [0004] The color prints formed by these electrophotographic methods use toner on the order of several μm as an image forming element, so there is a limit to the amount of toner that has poor gloss, and photographic images are achieved. It is currently possible to achieve the density necessary to achieve this, and these improvements are strongly desired for photo-like image output.
[0005] 上記課題に対し、コート紙にトナー溶融粘度低下剤を含む熱可塑性榭脂層を設け ることで光沢向上が上げる方法が開示されている（例えば、特許文献 1参照)。しかし ながら、この方法では基紙の平滑性が劣ること、トナーを高溶融して光沢を出すため 、必要な高温定着ではトナー定着面と接する定着部の加熱ローラーや加熱ベルトと の離型性悪化が発生し、逆に光沢劣化となる等、十分な光沢は得られてはおらず、 更に定着後には波打ち状の表面性劣化となる問題もあった。  [0005] To solve the above problem, a method has been disclosed in which gloss improvement is improved by providing a thermoplastic resin layer containing a toner melt viscosity reducing agent on a coated paper (see, for example, Patent Document 1). However, in this method, the smoothness of the base paper is inferior, and the toner is melted to give a gloss. In other words, sufficient gloss was not obtained, such as deterioration of gloss, and there was also a problem of wavy surface deterioration after fixing.
[0006] 一方、支持体上に空隙粒子を有する受像層を設けることで光沢等の画質向上を上 げている方法が開示されている（例えば、特許文献 2参照)。し力しながら、特許文献 2に記載の様に、特殊なベルト定着を用い冷却して剥離する定着方法とは異なり、加 熱ローラーや加熱ベルトからなる定着機で、かつ定着直後の比較的高温な状態で剥 離する一般的な定着方法においては、十分な光沢が得られないば力りでなぐ加熱 ローラーや加熱ベルトとの離型性が悪ぐ光沢が大きく劣化する問題があることが判 明し、また定着後の波打ちの問題も改善されな力つた。 On the other hand, a method is disclosed in which an image receiving layer having void particles is provided on a support to improve image quality such as gloss (see, for example, Patent Document 2). However, unlike the fixing method in which a special belt fixing is used for cooling and peeling as described in Patent Document 2, In a general fixing method using a fixing machine consisting of a heat roller and a heating belt and peeling off at a relatively high temperature immediately after fixing, if a sufficient gloss is not obtained, a heating roller or a heating belt can be used. As a result, it was found that there was a problem that the gloss was deteriorated due to the poor releasability, and the wavy problem after fixing was also improved.
[0007] また、基紙の両面にポリオレフイン榭脂被覆層を設けた高平滑な紙支持体上に、熱 可塑性榭脂層を設けることで光沢感等の写真感を向上させる方法が開示されている (例えば、特許文献 3参照)。この方法によれば、耐水性の高い紙支持体を用いること で定着後の波打ちは改善される力 フォトライクな光沢は得られず十分な写真感は得 られず、定着後には基紙中の水分が高温の定着熱により水蒸気化して紙を膨らませ る、 V、わゆるペーパーブリスタの発生や定着部との離型性による光沢劣化も見られた 特許文献 1 :特開 2004— 198965号公報  [0007] Also disclosed is a method for improving gloss and other photographic feelings by providing a thermoplastic resin layer on a highly smooth paper support provided with a polyolefin resin coating layer on both sides of the base paper. (For example, see Patent Document 3). According to this method, by using a paper substrate having high water resistance, the waviness after fixing can be improved. Photo-like gloss cannot be obtained, and sufficient photographic feeling cannot be obtained. Vaporization caused by high temperature fusing heat causes the paper to expand. V, generation of loose paper blisters, and gloss deterioration due to releasability from the fixing part were also seen. Patent Document 1: JP 2004-198965
特許文献 2：特開 2003 - 322993号公報  Patent Document 2: Japanese Patent Laid-Open No. 2003-322993
特許文献 3 :特開 2000— 66466号公報  Patent Document 3: Japanese Patent Laid-Open No. 2000-66466
発明の開示  Disclosure of the invention
発明が解決しょうとする課題  Problems to be solved by the invention
[0008] 本発明は、上記課題を鑑みてなされたものであり、その目的は、電子写真プロセス でフォトライクな高光沢のプリントが得られるとともに、定着ローラーや定着ベルトとの 離型性に優れ、波打ちの無いプリントが得られ、更に高温で定着してもペーパープリ スタの発生が無い電子写真受像材料を提供することにある。 [0008] The present invention has been made in view of the above problems, and an object thereof is to obtain a photo-like high-gloss print by an electrophotographic process and to be excellent in releasability from a fixing roller and a fixing belt. Another object of the present invention is to provide an electrophotographic image-receiving material that can produce a print without undulations and that does not generate a paper prestor even when it is fixed at a high temperature.
課題を解決するための手段  Means for solving the problem
[0009] 本発明の上記目的は、下記構成により達成された。 The above object of the present invention has been achieved by the following constitution.
[0010] 1.紙基体の両面に、溶融押し出しコーティングにより形成された熱可塑性榭脂から なる榭脂被覆層を有する紙支持体の少なくとも一方の面に、空隙を有する断熱層と、 該断熱層の上部に少なくとも 1層の熱可塑性榭脂を含有するトナー受容層を有する ことを特徴とする電子写真受像材料。  [0010] 1. A heat insulating layer having voids on at least one surface of a paper support having a resin coating layer made of thermoplastic resin formed by melt extrusion coating on both sides of a paper substrate, and the heat insulating layer An electrophotographic image receiving material comprising a toner receiving layer containing at least one layer of thermoplastic resin on the top of the electrophotographic image receiving material.
[0011] 2.前記トナー受容層が、ワックスを含有することを特徴とする前記 1に記載の電子 写真受像材料。 [0012] 3.前記榭脂被覆層を構成する熱可塑性榭脂が、ポリエチレン、ポリプロピレン、ポ リメチルペンテン及びポリエステルカゝら選ばれる少なくとも 1種であることを特徴とする 前記 1または 2に記載の電子写真受像材料。 [0011] 2. The electrophotographic image-receiving material as described in 1 above, wherein the toner-receiving layer contains a wax. [0012] 3. The thermoplastic resin constituting the resin coating layer is at least one selected from polyethylene, polypropylene, polymethylpentene, and a polyester cartridge. Electrophotographic image receiving material.
[0013] 4.前記榭脂被覆層を構成する熱可塑性榭脂がポリエチレン榭脂であって、該ポリ エチレン榭脂が高密度ポリエチレンを 50質量％以上含有することを特徴とする前記[0013] 4. The thermoplastic resin constituting the resin coating layer is a polyethylene resin, and the polyethylene resin contains 50% by mass or more of high-density polyethylene.
1または 2に記載の電子写真受像材料。 The electrophotographic image-receiving material according to 1 or 2.
[0014] 5.前記紙支持体のトナー受容層を有する面とは反対側の面に設けた榭脂被覆層[0014] 5. A resin coating layer provided on the surface of the paper support opposite to the surface having the toner receiving layer
Aが、高密度ポリエチレンを 50質量％以上含有し、前記紙支持体のトナー受容層を 有する面に設けた榭脂被覆層 Bが、低密度ポリエチレンを 80質量％以上含有し、か っ榭脂被覆層 Bの塗設量が 30g/m2以上であることを特徴とする前記 1乃至 4のい ずれか 1項に記載の電子写真受像材料。 A contains 50% by mass or more of high-density polyethylene, and the resin coating layer B provided on the surface of the paper support having the toner-receiving layer contains 80% by mass or more of low-density polyethylene. 5. The electrophotographic image-receiving material as described in any one of 1 to 4 above, wherein the coating amount of the coating layer B is 30 g / m 2 or more.
[0015] 6.前記榭脂被覆層は、軟化温度が 120°C以上の熱可塑性榭脂を 50質量％以上 含有していることを特徴とする前記 1乃至 5のいずれ力 1項に記載の電子写真受像材 料。 [0015] 6. The force according to any one of 1 to 5 above, wherein the resin coating layer contains 50% by mass or more of thermoplastic resin having a softening temperature of 120 ° C or more. Electrophotographic image receiving material.
[0016] 7.前記空隙を有する断熱層が、中空粒子と親水性バインダーとを含有することを 特徴とする前記 1乃至 6のいずれか 1項に記載の電子写真受像材料。  [0016] 7. The electrophotographic image-receiving material as described in any one of 1 to 6, wherein the heat-insulating layer having voids contains hollow particles and a hydrophilic binder.
[0017] 8.前記親水性バインダーが、可逆的にゾルゲル変換するノインダーであることを 特徴とする前記 7に記載の電子写真受像材料。  [0017] 8. The electrophotographic image-receiving material as described in 7 above, wherein the hydrophilic binder is a noinder capable of reversibly sol-gel conversion.
[0018] 9.前記可逆的にゾルゲル変換するノインダ一力 ゼラチンであることを特徴とする 前記 8に記載の電子写真受像材料。  [0018] 9. The electrophotographic image-receiving material as described in 8 above, wherein the electrophotographic image-receiving material is Noiner's best gelatin that reversibly sol-gel converts.
発明の効果  The invention's effect
[0019] 本発明により、フォトライクな光沢感を備えたプリントが得られると共に、定着ローラ 一や定着ベルトとの離型性に優れ、プリントの波打ちの発生がなぐかつ高温定着で ペーパーブリスタの発生がない電子写真受像材料を提供することができた。 発明を実施するための最良の形態  [0019] According to the present invention, a photo-like glossy print can be obtained, excellent releasability from the fixing roller and the fixing belt, no occurrence of wavy prints, and generation of paper blisters at high temperature fixing. It was possible to provide an electrophotographic image-receiving material free from the above. BEST MODE FOR CARRYING OUT THE INVENTION
[0020] 以下、本発明を実施するための最良の形態について詳細に説明する。 Hereinafter, the best mode for carrying out the present invention will be described in detail.
[0021] 本発明者は、上記課題に鑑み鋭意検討を行った結果、紙基体の両面に、溶融押し 出しコーティングにより形成された熱可塑性榭脂からなる榭脂被覆層を有する紙支持 体の少なくとも一方の面に、空隙を有する断熱層と、該断熱層の上部に少なくとも 1 層の熱可塑性榭脂を含有するトナー受容層を有することを特徴とする電子写真受像 材料により、フォトライクな光沢感を備えたプリントが得られると共に、定着ローラーや 定着ベルトとの離型性に優れ、プリントの波打ちの発生がなぐかつ高温定着でぺー パーブリスタの発生がない電子写真受像材料を実現できることを見出し、本発明に 至った次第である。 [0021] As a result of intensive studies in view of the above problems, the present inventor has found that a paper support having a resin coating layer made of thermoplastic resin formed by melt extrusion coating on both sides of a paper substrate. An electrophotographic image receiving material comprising a heat insulating layer having voids on at least one surface of a body, and a toner receiving layer containing at least one thermoplastic resin on the heat insulating layer. It is possible to obtain an electrophotographic image-receiving material that has excellent glossiness, has excellent releasability from the fixing roller and fixing belt, does not generate wavy prints, and does not generate paper blisters at high-temperature fixing. It is up to the headline and the present invention.
[0022] すなわち、本発明で規定する構成では、空隙を有する断熱層を榭脂被覆層を有す る紙支持体上を設け、更にトナーとの相溶性が高いトナー受容層を最上部に設ける ことで、断熱、蓄熱効果によりトナー中のワックスのブリードアウトを促進でき、トナーと トナー受容層との密着性を高めることで、定着部との高い離型性を得られることが分 かった。  That is, in the configuration defined in the present invention, a heat insulating layer having voids is provided on a paper support having a resin coating layer, and a toner receiving layer having high compatibility with toner is provided on the top. As a result, it was found that the bleed-out of the wax in the toner can be promoted by the heat insulation and heat storage effects, and the high releasability from the fixing portion can be obtained by improving the adhesion between the toner and the toner receiving layer.
[0023] また、榭脂被覆層を設ける紙支持体で重大課題であるペーパーブリスタに対し、断 熱層による断熱効果と、溶融押し出しコーティングによる基紙と榭脂被覆層との高い 密着性により紙ブリスタを大きく改善できることが分力つた。  [0023] In addition, paper blisters, which are a serious problem in a paper support on which a resin coating layer is provided, have a heat insulating effect due to a heat-insulating layer and high adhesion between the base paper and the resin coating layer by melt extrusion coating. It was possible to greatly improve blisters.
[0024] 以下、本発明の電子写真受像材料の詳細について説明する。  [0024] Details of the electrophotographic image-receiving material of the present invention will be described below.
[0025] 《紙支持体》  [0025] << paper support >>
本発明に係る紙支持体は、シート状の紙基体 (基紙ともいう）の表裏両面上に、そ れぞれ熱可塑性榭脂からなる榭脂被覆層が溶融押出コーティング法により形成され た両面榭脂被覆紙カゝらなる。  The paper support according to the present invention is a double-sided coating in which a resin coating layer made of thermoplastic resin is formed on both the front and back surfaces of a sheet-like paper substrate (also referred to as a base paper) by a melt extrusion coating method. A resin-coated paper sheet.
[0026] 本発明に係る紙支持体に用いられる基紙は、通常の天然パルプを成分とするもの のほか、合成パルプや合成繊維等でもよぐこれらの混合物でもよい。これらの中で は針葉榭材パルプ、広葉榭材パルプ、針葉樹広葉樹材混合パルプの木材パルプを 主成分とする天然パルプ紙が好ましく使用される。これらの該基紙中には各種の高 分子化合物、添加剤を含有せしめることができる。例えば乾燥低力強剤、サイズ剤、 顔料、湿潤紙力増強剤、定着剤、 pH調節剤などを適宜組み併せて含有せしめること ができる。  [0026] The base paper used for the paper support according to the present invention may be a natural pulp as a component, or may be a synthetic pulp or synthetic fiber, or a mixture thereof. Among these, natural pulp paper mainly composed of wood pulp of softwood straw pulp, hardwood straw pulp, and softwood hardwood mixed pulp is preferably used. These base papers can contain various high molecular compounds and additives. For example, a dry low strength agent, a sizing agent, a pigment, a wet paper strength enhancer, a fixing agent, a pH adjuster and the like can be appropriately combined.
[0027] 基紙の坪量は、特に制限はないが、その坪量は 50gZm2〜200gZm2が好ましぐ 又、密度も特に制限はないが、通常 0. 90〜： L 15g/cm3が好ましい。 [0028] 被覆用の熱可塑性榭脂としては、汎用の熱可塑性榭脂を用いることができる力 ポ リエチレン、ポリプロピレン、ポリメチルペンテン、ポリエチレンテレフタレート等のポリ エステル力も選ばれる熱可塑性榭脂が好ましい。 [0027] The basis weight of the base paper is not particularly limited, but the basis weight is preferably 50 gZm 2 to 200 gZm 2. Also, the density is not particularly limited, but usually 0.90 to L: 15 g / cm 3 Is preferred. [0028] As the thermoplastic resin for coating, a thermoplastic resin that is capable of using a general-purpose thermoplastic resin, such as polyethylene, polypropylene, polymethylpentene, polyethylene terephthalate, and the like, which is also selected.
[0029] 被覆用の熱可塑性榭脂の軟ィ匕点としては、定着ローラー力もの定着温度を空隙を 有する断熱層で効果的に断熱することから、軟ィ匕点 90°C以上の熱可塑性榭脂なら ば用いることができる力 軟ィ匕点 120°C以上の熱可塑性榭脂が 50質量％以上含ま れていることが好ましぐ更に好ましくは 50質量％以上、 100質量％以下である。な お、本発明でいう軟ィ匕点とは、ビカット軟化点を示す。  [0029] The soft point of the thermoplastic resin for coating is that the fixing temperature of the fixing roller is effectively insulated by a heat insulating layer having voids, so that the soft point of the thermoplastic resin is 90 ° C or higher. Forces that can be used in the case of cocoa resin It is preferable that 50% by mass or more of thermoplastic resin having a soft softness point of 120 ° C or higher is contained, more preferably 50% by mass or more and 100% by mass or less. . Note that the soft saddle point in the present invention indicates the Vicat softening point.
[0030] 表裏面に設ける熱可塑性榭脂の樹脂被覆層の厚さは、特に制限は無いが、 5〜10 0 mの範囲であることが、紙支持体を製造する観点力 一般的である。  [0030] The thickness of the resin coating layer of the thermoplastic resin provided on the front and back surfaces is not particularly limited, but a range of 5 to 100 m is generally a viewpoint power for producing a paper support. .
[0031] 溶融押し出しコーティングにおいては、熱可塑性榭脂としてポリエチレンを用いるこ とが、基紙との密着性、製造適性、かつ榭脂価格が安いという観点から好ましい。  [0031] In melt extrusion coating, it is preferable to use polyethylene as the thermoplastic resin from the viewpoints of adhesion to the base paper, suitability for production, and low cost of the resin.
[0032] ポリエチレンの種類としては、その密度の違いから、 1)密度 0. 910gZcm3以上、 0 . 930gZcm3未満を低密度ポリエチレン（LDPE)、 2)密度 0. 930gZcm3以上、 0. 942gZcm3未満を中密度ポリエチレン（MDPE)、 3)密度 0. 942gZcm3以上を高 密度ポリエチレン (HDPE)に分類されるが、本発明に係る紙支持体の榭脂被覆層に ポリエチレン榭脂を用いる場合には、密度 0. 942gZcm3以上の高密度ポリエチレン を 50質量0 /0含むポリエチレン榭脂が好ま 、。 [0032] As the types of polyethylene, due to the difference in density, 1) density of 0.910 gZcm 3 or more, less than 930 gZcm 3 is low density polyethylene (LDPE), 2) density is 930 gZcm 3 or more, 0.9942 gZcm 3 Less than medium density polyethylene (MDPE), 3) density 0.9942 gZcm 3 or more is classified as high density polyethylene (HDPE), but when polyethylene resin is used for the resin coating layer of the paper support according to the present invention. polyethylene榭脂is preferred, including the density 0. 942gZcm 3 or more high-density polyethylene 50 weight 0/0.
[0033] 本発明に係る紙支持体においては、紙支持体のトナー受容層を有する面に設けた 榭脂被覆層 Bが、密度が 0. 930gZcm3未満の低密度ポリエチレンを 80質量％以上 含有するポリエチレン榭脂を用いる場合には、榭脂被覆層 Bの塗設量を 30g/m2以 上とすることが、紙ブリスタ耐性力も好ましい。 [0033] In the paper support according to the present invention, the resin coating layer B provided on the surface having the toner receiving layer of the paper support contains 80% by mass or more of low density polyethylene having a density of less than 0.930 gZcm 3. In the case of using polyethylene resin, the coating amount of the resin coating layer B is preferably 30 g / m 2 or more, and the paper blister resistance is also preferable.
[0034] また、本発明に係る榭脂被覆層中には、着色顔料、滑剤、酸化防止剤等を含有さ せることができる。  [0034] The resin coating layer according to the present invention may contain a color pigment, a lubricant, an antioxidant and the like.
[0035] 本発明に係る紙支持体は、基紙上に熱可塑性榭脂からなる榭脂組成物をスリット ダイ力 フィルム状に溶融押し出し塗工して製造される。その際、溶融押出温度は 20 0°C乃至 350°Cであることが好ましい。スリットダイとしては、 T型ダイ、 L型ダイ、フイツ シュティル型ダイが好ましい。また、被覆操作前の基紙にコロナ放電処理、火炎処理 などの活性ィ匕処理を施したり、加熱溶融した榭脂フィルムの表面にオゾンガスを吹き つけてこれを活性ィ匕することにより基紙と榭脂被覆層の接着性を向上させてもよい。 [0035] The paper support according to the present invention is produced by melt extrusion coating a resin composition comprising thermoplastic resin on a base paper in the form of a slit die force film. At that time, the melt extrusion temperature is preferably 200 ° C. to 350 ° C. The slit die is preferably a T-type die, an L-type die, or a Fitztil type die. In addition, corona discharge treatment, flame treatment on the base paper before coating operation The adhesion between the base paper and the resin coating layer may be improved by applying an active resin treatment such as the above, or by spraying ozone gas onto the surface of the heated and melted resin film to activate it.
[0036] 紙支持体の厚みとしては、通常 80〜300 μ mである。また、紙支持体の剛度、平滑 性としては、特に制限はなぐ目的に応じて適宜選択することができる。  [0036] The thickness of the paper support is usually 80 to 300 µm. Further, the rigidity and smoothness of the paper support can be appropriately selected according to the purpose for which there is no particular limitation.
[0037] また、本発明に係る紙支持体の片面あるいは両面には、その上に設けられる層との 密着性を改良する目的で、種々の表面処理や下塗り処理を施すことができる。表面 処理としては、例えば、光沢面、特開昭 55— 26507号公報記載の微細面、マット面 あるいは絹目面の型付け処理、コロナ放電処理、火炎処理、グロ一放電処理、プラズ マ処理等の活性化処理などが挙げられる。また、下塗り処理としては、例えば、特開 昭 61— 846443号公報に記載の方法が挙げられる。これらの処理は、単独で施して もよいし、また、前記型付け処理等を行った後に活性ィ匕処理を施してもよいし、更に 活性化処理等の表面処理後に下塗り処理を施してもよぐそれらの各手段を任意に 糸且合せることができる。  [0037] In addition, one or both surfaces of the paper support according to the present invention can be subjected to various surface treatments and undercoating treatments for the purpose of improving the adhesion with a layer provided thereon. Examples of the surface treatment include glossy surface, fine surface described in JP-A-55-26507, mat surface or silk surface molding treatment, corona discharge treatment, flame treatment, glow discharge treatment, plasma treatment, etc. An activation process etc. are mentioned. Examples of the undercoating treatment include the method described in JP-A No. 61-846443. These treatments may be performed alone, or may be subjected to an activation treatment after the above-described molding treatment or the like, or may be subjected to a primer treatment after a surface treatment such as an activation treatment. Each of these means can be arbitrarily combined.
[0038] 紙支持体中、紙支持体の表面あるいは裏面、またはこれらの組合せにぉ 、て、親 水性バインダーと、アルミナゾルや酸化スズ等の半導性金属酸化物と、カーボンブラ ックその他の帯電防止剤とを塗布してもよ 、。  [0038] In the paper support, on the front or back surface of the paper support, or a combination thereof, a hydrophilic resin, a semiconductive metal oxide such as alumina sol or tin oxide, carbon black, or other You can also apply an antistatic agent.
[0039] 《断熱層》  [0039] << Insulation layer >>
本発明の電子写真受像材料では、紙支持体とトナー受容層との間に、空隙を有す る断熱層を有することを特徴とし、高い空隙率 (空隙容量)を有する断熱層であること が好ましい。  The electrophotographic image-receiving material of the present invention is characterized by having a heat-insulating layer having voids between the paper support and the toner-receiving layer, and is a heat-insulating layer having a high porosity (void capacity). preferable.
[0040] トナー受容層の下部に本発明に係る断熱層を設けることにより、定着時に定着ロー ラー等力 付与される熱エネルギーを拡散を遮断し、トナー受容層の高温状態を維 持することにより、トナー受容層に着弾したトナー粒子の融解、平滑化あるいはトナー 受容層中への埋込効果を発揮させることにより、光沢感のあるプリントが得られると共 に、紙ブリスタが発生するのを防止し、かつ定着熱の効率ィ匕でトナーを高融解するこ とで、トナー中のワックスのブリードアウトを促進することにより、定着ローラーや定着 ベルトからなる定着加熱部とトナーとの離型性を向上することが分力つた。  [0040] By providing the heat insulating layer according to the present invention below the toner receiving layer, the thermal energy applied by the fixing roller at the time of fixing is blocked from diffusing, and the high temperature state of the toner receiving layer is maintained. In addition to providing glossy prints by melting and smoothing the toner particles that land on the toner receiving layer, or by embedding them in the toner receiving layer, paper blisters can be prevented from occurring. In addition, the toner is highly melted with the efficiency of fixing heat to promote the bleed-out of the wax in the toner, thereby improving the releasability between the fixing heating part consisting of the fixing roller and the fixing belt and the toner. It has become a force to improve.
[0041] 本発明に係る断熱層の空隙率としては 30%以上であればよいが、 40%以上であ ることが好ましぐ 50%以上、 80%以下であることが特に好ましい。 [0041] The porosity of the heat insulating layer according to the present invention may be 30% or more, but 40% or more. It is particularly preferable that it is 50% or more and 80% or less.
[0042] 本発明で規定する高空隙率を有する断熱層を形成する材料としては、発泡プラス チック、中空粒子あるいは多孔質粒子を榭脂層に分散させたものが用いられる。 [0042] As a material for forming the heat insulating layer having a high porosity defined in the present invention, a material in which foamed plastic, hollow particles or porous particles are dispersed in a resin layer is used.
[0043] 発泡性プラスチックは熱可融性物質を殻とし、内部に低沸点溶剤を含有する中空 状のプラスチックフィラーであり加熱により発泡する。このプラスチックフィラーの殻と なる熱可塑性榭脂としては、ポリスチレン、ポリ塩化ビニル、ポリ塩ィ匕ビユリデン、ポリ 酢酸ビュル、ポリアクリル酸エステル、ポリアクリル-トリル、ポリブタジエン、或いはそ れらの共重合体が挙げられる。また殻内に含まれる発泡剤としては、プロパンやイソ ブタン、ネオペンタン、石油エーテル等がある。例えば、松本油脂社製のミクロパー ル、ケマノード社製の Expancelがある。 [0043] Foamable plastic is a hollow plastic filler containing a heat-fusible substance as a shell and containing a low-boiling solvent inside, and foams when heated. Examples of the thermoplastic resin used as the shell of the plastic filler include polystyrene, polyvinyl chloride, polysalt / vinylidene, poly (vinyl acetate), poly (acrylic acid ester), poly (acrylic-tolyl), poly (butadiene), and copolymers thereof. Is mentioned. Examples of foaming agents contained in the shell include propane, isobutane, neopentane, and petroleum ether. For example, there are Micropal manufactured by Matsumoto Yushi and Expancel manufactured by Kemanode.
[0044] 中空粒子としては、ガラス、セラミックス、プラスチックス等の種々の材質で形成され た微小中空体があり、ガラス微小中空体としては、硼硅酸塩ガラスのマイクロフェアー 、例えば、グラパーベル社製の Microsel M、アルミノシリケート系微小中空体として は低発泡射出成型用及び標準射出成型用プレミックス、例えば、 日本フィライト社製 の Filliteがある。 As the hollow particles, there are micro hollow bodies formed of various materials such as glass, ceramics, and plastics. As the glass micro hollow bodies, borosilicate glass microspheres, for example, manufactured by Grapabell Microsel M and aluminosilicate micro hollow bodies include premixes for low foam injection molding and standard injection molding, for example, Fillite manufactured by Nippon Philite.
[0045] また、断熱層に有機中空粒子を用いる場合、本発明に用いられる中空粒子は、熱 膨張性の中空粒子やカプセル状の中空ポリマーが挙げられる。熱膨張性の中空粒 子は、塩化ビニリデンーアクリロニトリル共重合体等の熱可塑性物質を壁材とする中 空粒子であり、粒子内部にプロパン、 n—ブタン、イソブタン等の熱膨張性気体を含 有する物質である。又、非膨張性の中空粒子は、スチレン アクリル等の榭脂を壁材 とし、内部に水が入っており、乾燥時に水が蒸発し中空粒子となるポリマーである。上 記のような中空粒子は、一般に 0. 1〜： LOO /z m程度の粒径を有している力 本発明 において用いられる中空粒子の粒子径は、 0. 2〜： LO /z m力 子ましく、より好ましくは 0. 3〜5 /ζ πιである。 0. 未満では、中空粒子として十分な断熱効果が得られ ず、 10 mを超えると平滑性の低下が著しくなる。  [0045] When organic hollow particles are used in the heat insulating layer, examples of the hollow particles used in the present invention include thermally expandable hollow particles and capsule-shaped hollow polymers. Thermally expandable hollow particles are hollow particles whose wall material is a thermoplastic material such as vinylidene chloride-acrylonitrile copolymer, and contain thermally expandable gases such as propane, n-butane, and isobutane. It is a substance that has. Non-expandable hollow particles are polymers in which a resin such as styrene-acrylic is used as a wall material, water is contained inside, and water evaporates during drying to form hollow particles. The hollow particles as described above generally have a force having a particle size of about 0.1 to: LOO / zm. The hollow particles used in the present invention have a particle size of 0.2 to: LO / zm force More preferably, it is 0.3-5 / ζ πι. If it is less than 0., sufficient heat insulating effect as a hollow particle cannot be obtained, and if it exceeds 10 m, the smoothness deteriorates remarkably.
[0046] 本発明に係る断熱層としては、非膨張性の中空粒子で形成されていることが好まし い。  [0046] The heat insulating layer according to the present invention is preferably formed of non-expandable hollow particles.
[0047] 上記断熱層を保持するバインダーとしては、特に限定はないが、例えば、スチレン ブタジエンゴム、スチレンーメチルメタクリレートーブタジエンゴム、アクリル榭脂、ァ クリル一スチレン榭脂、アクリル一マレイン酸榭脂、アクリル一酢酸ビュル榭脂、ェチ レン 酢酸ビュル榭脂等のェマルジヨンタイプの合成樹脂、ポリビュルアルコール、 スターチ、カゼイン、ゼラチン等の水溶性高分子、カルボキシ'メチルセルローズ、ポ リエチレンォキシド等が挙げられる力 可逆的にゾルーゲル変換するバインダーであ ることが好ましい。 [0047] The binder for holding the heat insulating layer is not particularly limited. For example, styrene Emulsion types such as butadiene rubber, styrene-methyl methacrylate-butadiene rubber, acrylic resin, acrylic-styrene resin, acrylic-maleic acid resin, acrylic monoacetate resin, ethylenic acid resin resin, etc. A binder capable of reversible sol-gel conversion is preferred, including synthetic resins, water-soluble polymers such as polybulal alcohol, starch, casein, and gelatin, carboxy'methylcellulose, and polyethylene oxide.
[0048] 可逆的にゾルーゲル変換するバインダーとしては、ゼラチン、ジエランガム、カラー ギーナン、寒天、ぺクチン等があるが、ゼラチンであることがより好ましい。  [0048] Examples of the binder that reversibly converts to sol-gel include gelatin, dielan gum, color ginnan, agar, pectin, and the like, and gelatin is more preferable.
[0049] 本発明に係る断熱層の膜厚としては、概ね 20 μ mであるが、 30 μ m以上が好まし く、更に好ましくは 30 m以上、 60 m以下である。 [0049] The thickness of the heat insulating layer according to the present invention is generally 20 μm, preferably 30 μm or more, more preferably 30 m or more and 60 m or less.
[0050] 《トナー受容層》 [0050] <Toner-receiving layer>
本発明に係るトナー受容層は、熱可塑性榭脂により構成されている。  The toner receiving layer according to the present invention is composed of a thermoplastic resin.
[0051] 本発明に係るトナー受容層に適用可能な熱可塑性榭脂としては、例えば、以下の 熱可塑性榭脂を例示することができる。 [0051] Examples of the thermoplastic resin applicable to the toner receiving layer according to the present invention include the following thermoplastic resins.
[0052] (ィ）ポリエチレン榭脂、ポリプロピレン榭脂等のポリオレフイン榭脂や、エチレンゃプ ロピレン等のォレフィンと他のビュルモノマーとの共重合体榭脂や、アクリル榭脂等、 (口）エステル結合を有するもの [0052] (ii) Polyolefin resin such as polyethylene resin and polypropylene resin, copolymer resin of olefins such as ethylene propylene and other bulur monomers, acrylic resin, etc. Having a bond
例えば、テレフタル酸、イソフタル酸、マレイン酸、フマル酸、フタル酸、アジピン酸、 セバシン酸、ァゼライン酸、ァビエチン酸、コハク酸、トリメリット酸、ピロメリット酸等の ジカルボン酸成分（これらのジカルボン酸成分にはスルホン酸基、カルボキシル基等 が置換していてもよい）と、エチレングリコール、ジエチレングリコール、プロピレングリ コール、ビスフエノール A、ビスフエノール Aのジエーテル誘導体（例えば、ビスフエノ ール Aのエチレンオキサイド 2付カ卩物、ビスフエノール Aのプロピレンオキサイド 2付カロ 物など）、ビスフエノール S、 2—ェチルシクロへキシルジメタノール、ネオペンチルグリ コール、シクロへキシルジメタノール、グリセリン等のアルコール成分（これらのアルコ ール成分には水酸基などが置換されていてもよい）との縮合により得られるポリエステ ル榭脂、ポリメチルメタタリレート、ポリブチルメタタリレート、ポリメチルアタリレート、ポ リブチルアタリレート等のポリアクリル酸エステル榭脂又はポリメタクリル酸エステル榭 脂、ポリカーボネート榭脂、ポリ酢酸ビュル榭脂、スチレンアタリレート榭脂、スチレン ーメタクリル酸エステル共重合体榭脂、ビュルトルエンアタリレート榭脂等。具体的に は、特開昭 59— 101395号、同 63— 7971号、同 63— 7972号、同 63— 7973号、 同 60— 294862号に記載のものを挙げることができる。また、市販品としては東洋紡 社製のバイロン 290、 ノ ィロン 200、 ノ ィロン 280、 ノ ィロン 300、バイロン 103、バイ ロン GK— 140、バイロン GK— 130等、花王製のタフトン NE— 382、タフトン U— 5、 ATR— 2009、 ATR— 2010等、ュ-チカ製のエリーテル UE3500、 UE3210、 XA 8153等、 日本合成化学製のポリエスター TP— 220、 R— 188等を挙げることがで きる。 For example, dicarboxylic acid components such as terephthalic acid, isophthalic acid, maleic acid, fumaric acid, phthalic acid, adipic acid, sebacic acid, azelaic acid, abietic acid, succinic acid, trimellitic acid, pyromellitic acid (these dicarboxylic acid components May be substituted with a sulfonic acid group, a carboxyl group, etc.) and ethylene glycol, diethylene glycol, propylene glycol, bisphenol A, diether derivatives of bisphenol A (for example, ethylene oxide 2 of bisphenol A) Alcohol components such as carbonate, bisphenol A propylene oxide 2), bisphenol S, 2-ethylcyclohexyldimethanol, neopentylglycol, cyclohexyldimethanol, glycerin and the like (these alcohols) Hydroxyl component Polyester resins, polymethyl methacrylate, polybutyl methacrylate, polymethyl acrylate, polybutyl acrylate, etc. Or polymethacrylic acid ester Fats, polycarbonate resin, polyacetic acid resin resin, styrene acrylate resin resin, styrene-methacrylate copolymer resin, butyl toluene acrylate resin resin. Specific examples include those described in JP-A Nos. 59-101395, 63-7971, 63-7972, 63-7973, and 60-294862. Commercially available products include Toyobo's Byron 290, Nylon 200, Nylon 280, Nylon 300, Byron 103, Byron GK-140, Byron GK-130, Kao's Tufton NE-382, Tufton U — 5, ATR—2009, ATR—2010, etc., Elutel UE3500, UE3210, XA 8153, etc. made by Utica, Polyester TP-220, R-188, etc. made by Nippon Synthetic Chemical.
[0053] (ハ)ポリウレタン榭脂等、  [0053] (C) Polyurethane resin, etc.
(二)ポリアミド榭脂、尿素樹脂等、  (2) Polyamide resin, urea resin, etc.
(ホ）ポリスルホン樹脂等、  (E) Polysulfone resin, etc.
(へ)ポリ塩ィ匕ビニル榭脂、ポリ塩ィ匕ビユリデン榭脂、塩ィ匕ビ二ルー酢酸ビニル共重 合体榭脂、塩化ビニループ口ピオン酸ビニル共重合体榭脂等、  (F) Poly salt vinyl resin, poly salt vinylidene resin, salt vinyl acetate vinyl acetate copolymer resin, vinyl chloride / vinyl pionate copolymer resin, etc.
(ト）ポリビュルブチラール等の、ポリオール榭脂、ェチルセルロース榭脂、酢酸セル ロース榭脂等のセルロース榭脂等、  (G) Polyol butyral, etc., polyol resin, ethyl cellulose resin, cellulose resin such as cellulose acetate resin,
(チ)ポリ力プロラタトン榭脂、スチレン 無水マレイン酸榭脂、ポリアクリロニトリル榭 脂、ポリエーテル榭脂、エポキシ榭脂、フエノール榭脂等。  (H) Poly-strength prolatatone resin, styrene maleic anhydride resin, polyacrylonitrile resin, polyether resin, epoxy resin, phenol resin, and the like.
[0054] 上記の各熱可塑性榭脂は、単独で使用してもよぐまたはこれらの熱可塑性榭脂を 2種以上混合して使用してもょ 、。  [0054] Each of the above thermoplastic resin may be used alone or in combination of two or more of these thermoplastic resins.
[0055] トナー受容層は、単層でもよぐまた 2層以上で構成されていてもよぐトナー受容層 の膜厚としては、概ね 0. 1〜50 μ mであり、好ましくは 0. 5〜20 μ mである。  [0055] The thickness of the toner receiving layer, which may be a single layer or may be composed of two or more layers, is generally 0.1 to 50 μm, preferably 0.5. ~ 20 μm.
[0056] 本発明に係るトナー受容層で用いる熱可塑性榭脂のガラス転移点としては、 0°C以 上、好ましくは 20°C以上であり、熱伝導率は 0. 3WZm'K以下であることが好ましい 。熱可塑性榭脂の熱伝導率は、例えば、「新版プラスチック材料読本」（工業調査会、 1993年 4月 1日、新版 4刷発行)、「プラスチック成形加工データブック」 (日刊工業新 ,昭和 63年 3月初版 1刷発行)、「プラスチック 'データブック」（工業調査会、 1999 年 12月初版 1刷発行）に記載されている方法に従って求めることができる。 [0057] 本発明に係るトナー受容層で用いる熱可塑性榭脂は、受容するトナーを構成する 結着樹脂との相溶性の高い榭脂を選択することが、本発明の効果をより発揮できる 観点から好ましい。 [0056] The glass transition point of the thermoplastic resin used in the toner receiving layer according to the present invention is 0 ° C or higher, preferably 20 ° C or higher, and the thermal conductivity is 0.3 WZm'K or lower. It is preferable. The thermal conductivity of thermoplastic resin is, for example, “New edition plastic material reader” (Industry Research Committee, April 1, 1993, published 4 edition of new edition), “Plastic molding data book” (Nikkan Kogyo Shin, Showa 63 The first edition of the first edition published in March, 2000) and the “Plastics' Data Book” (Industry Research Committee, first edition issued in December 1999) can be used. As the thermoplastic resin used in the toner receiving layer according to the present invention, it is possible to select the resin having high compatibility with the binder resin that constitutes the toner to be received. To preferred.
[0058] 本発明でいうトナーの結着樹脂と相溶するということは、定着後の画像においてトナ 一受容層の熱可塑性榭脂とトナーの結着榭脂とが境界を形成しない状態になること を意味する。トナーの結着樹脂との相溶性を評価する方法として、例えば、特開平 2 —263642号公報に記載の溶解度パラメータが用いて測定する方法が記載されて いるが、より適切な評価方法として、溶融トナー傾斜角の測定方法を挙げることがで きる。  The term “compatible with the toner binder resin” in the present invention means that in the image after fixing, the thermoplastic resin of the toner receiving layer and the toner binder resin do not form a boundary. Means that. As a method of evaluating the compatibility of the toner with the binder resin, for example, a method of measuring using the solubility parameter described in JP-A-2-263642 is described. As a more appropriate evaluation method, a melting method is described. A method for measuring the toner inclination angle can be mentioned.
[0059] 溶融トナー傾斜角の測定方法としては、トナーのディスクを成形した後、所定の温 度に設定された熱可塑性榭脂から構成されるトナー受容層とトナーディスクを密着さ せ、トナーディスクを溶融させた後、急冷、固化させる。この試料を、共和界面化学（ 株)製の接触角測定装置を使用し、トナーが固化した後のトナーの裾野の角度を 2回 測定し、その平均値をもって溶融トナー傾斜角とする。  [0059] As a method for measuring the molten toner inclination angle, after forming a toner disk, a toner receiving layer composed of a thermoplastic resin set to a predetermined temperature is brought into intimate contact with the toner disk, and the toner disk is measured. Is melted and then rapidly cooled and solidified. Using this contact angle measuring device manufactured by Kyowa Interface Chemical Co., Ltd., measure the angle of the bottom of the toner after the toner is solidified, and use the average value as the molten toner inclination angle.
[0060] この溶融トナー傾斜角の観点から熱可塑性榭脂を選択する場合、カラー画像形成 に用いるトナーと熱可塑性榭脂とのトナー傾斜角が 40度以下の榭脂を用いることが 好ましい。溶融トナー傾斜角が 40度以下になる透明榭脂層の榭脂としては、ポリエス テル榭脂、スチレン アクリルエステル榭脂、エポキシ榭脂、ポリウレタン榭脂、ポリメ チルメタクリレート榭脂、塩化ビニル榭脂、塩化ビニルー酢酸ビニル共重合体等の熱 可塑性榭脂を挙げることができる。特に好ましいのは、トナーの主要榭脂 (結着榭脂 を基準として、 50質量％以上含有される榭脂）と同種の榭脂である。すなわち、トナ 一の主要樹脂がポリエステル榭脂であればトナー受容層の熱可塑性榭脂としてはポ リエステル榭脂を、トナーの主要樹脂がスチレン—アクリルエステル榭脂であればトナ 一受容層の熱可塑性榭脂として、アクリル榭脂か、スチレン一アクリルエステル榭脂 を用いることが好ましい。  [0060] When a thermoplastic resin is selected from the viewpoint of the molten toner inclination angle, it is preferable to use a resin having a toner inclination angle of 40 degrees or less between the toner used for color image formation and the thermoplastic resin. Transparent resin layers with a melt toner tilt angle of 40 degrees or less include polyester resin, styrene acrylic ester resin, epoxy resin, polyurethane resin, methyl methacrylate resin, vinyl chloride resin, Mention may be made of thermoplastic resins such as vinyl chloride-vinyl acetate copolymers. Particularly preferred is the same type of resin as the main resin of the toner (a resin containing 50% by mass or more based on the binder resin). That is, if the toner main resin is a polyester resin, a polyester resin is used as the thermoplastic resin of the toner receiving layer, and if the toner resin is a styrene-acrylic ester resin, the toner receiving layer heat resin is used. It is preferable to use acrylic resin or styrene-acrylic ester resin as the plastic resin.
[0061] 《ワックス》 [0061] << Wax >>
本発明に係るトナー受容層には、ワックスを含有することが好ま ヽ。  The toner receiving layer according to the present invention preferably contains a wax.
[0062] ワックスとしては、特に制限はなぐ目的に応じて適宜選定することができ、例えば、 石油ワックス、変性ワックス、水素化ワックス、植物系ワックス、動物系ワックス、鉱物系 ワックス、合成炭化水素、などが挙げられる。 [0062] The wax can be appropriately selected according to the purpose without particular limitation, for example, Examples include petroleum wax, modified wax, hydrogenated wax, vegetable wax, animal wax, mineral wax, and synthetic hydrocarbon.
[0063] 石油ワックスとしては、例えば、パラフィンワックス、マイクロクリスタリンワックス、ぺト ロラタム、フィッシャートロプシュワックス、酸アミドィ匕合物或いは酸イミドィ匕合物などが 挙げられる。  [0063] Examples of petroleum waxes include paraffin wax, microcrystalline wax, petrolatum, Fischer-Tropsch wax, acid amide compounds, and acid imido compounds.
[0064] 変性ワックスとしては、例えば、ァミン変性ポリプロピレン、アクリル酸変性やフッ素 変性、ォレフィン変性ワックス、ウレタン型ワックス、アルコール型ワックスなどが挙げら れる。  [0064] Examples of the modified wax include ammine-modified polypropylene, acrylic acid-modified, fluorine-modified, olefin-modified wax, urethane-type wax, and alcohol-type wax.
[0065] 水素化ワックスとしては、例えば、硬化ひまし油、ヒマシ油誘導体、ステアリン酸、ラ ゥリン酸、ミリスチン酸、パルミチン酸、ベへニン酸、セバシン酸、ゥンデシレン酸、マ レイン酸、高度マレインィ匕油、吹込油、シクロペンタジェンィ匕油などの合成ワックス等 が挙げられる。  [0065] Examples of the hydrogenated wax include hydrogenated castor oil, castor oil derivatives, stearic acid, lauric acid, myristic acid, palmitic acid, behenic acid, sebacic acid, undecylenic acid, maleic acid, and high-grade maleic oil. And synthetic waxes such as blown oil and cyclopentadiene oil.
[0066] 植物系ワックスとしては、例えば、カルナバワックス、ヒマシ油、ナタネ油、大豆油、 木ろう、綿ろう、ライスワックス、サトウキビワックス、キャンデリラワックス、ジャパンヮック ス、ホホバ油などが挙げられる。  [0066] Examples of plant-based waxes include carnauba wax, castor oil, rapeseed oil, soybean oil, wax, cotton wax, rice wax, sugarcane wax, candelilla wax, Japan wax, and jojoba oil.
[0067] 動物系ワックスとしては、例えば、蜜蝌、ラノリン、鯨蝌、ステ蝌 (鯨油）、羊毛蝌など が挙げられる。  [0067] Examples of animal waxes include beeswax, lanolin, whale pod, stew (whale oil), and wool cocoon.
[0068] 鉱物系ワックスとしては、例えば、ォゾケライト、セレシンなどの天然ワックスや、モン タン酸エステルワックスなどの脂肪酸エステルなどが挙げられる。  [0068] Examples of the mineral wax include natural waxes such as ozokerite and ceresin, and fatty acid esters such as montanoic ester wax.
[0069] 合成炭化水素としては、ポリエチレンワックス、ポリプロピレンワックス、フィッシャート 口プシュワックスなど、酸アミドィ匕合物或いは酸イミド化合物などが挙げられる。  [0069] Examples of the synthetic hydrocarbon include an acid amide compound or an acid imide compound such as polyethylene wax, polypropylene wax, and Fischer port push wax.
これらの中でも、カルナバワックス、脂肪酸エステル系ワックス、パラフィンワックス、酸 アミド化合物などが好適である。  Among these, carnauba wax, fatty acid ester wax, paraffin wax, acid amide compound and the like are preferable.
[0070] 本発明で使用されるワックスの量は、ワックスの種類にもよる力 例えば、トナー受容 層の質量に対して、 1〜20質量％、好ましくは 2〜15質量％であることが適当である  [0070] The amount of the wax used in the present invention is a force depending on the type of the wax. For example, the amount of the wax is 1 to 20% by mass, preferably 2 to 15% by mass with respect to the mass of the toner receiving layer. Is
[0071] トナー受容層へのワックスの添加方法においては、特に制限は無いが、ワックスを 加熱して融解した液を添加する方法、ワックスが微細に分散された水分散エマルショ ンを添加する方法、等がある。 [0071] The method of adding the wax to the toner receiving layer is not particularly limited, but a method of adding a liquid obtained by heating and melting the wax, or a water dispersion emulsion in which the wax is finely dispersed. There is a method of adding selenium.
[0072] 《トナー受容層、断熱層のその他の添加剤》  [0072] << Other Additives for Toner Receiving Layer and Heat Insulating Layer >>
本発明に係るトナー受像層あるいは断熱層には、上記説明した各添加剤の他に、 その熱力学的特性を改良する目的で、種々の添加剤を用いることができる。  In addition to the above-described additives, various additives can be used in the toner image-receiving layer or heat insulating layer according to the present invention for the purpose of improving the thermodynamic characteristics.
[0073] そのような添加剤としては、その目的に応じて適宜選択することができる力 例えば 、可塑剤、フィラー、架橋剤、帯電調整剤、導電剤、顔料、界面活性剤、染料、調湿 剤、マット剤等が挙げられる。  [0073] As such an additive, a force that can be appropriately selected depending on the purpose, for example, a plasticizer, a filler, a cross-linking agent, a charge control agent, a conductive agent, a pigment, a surfactant, a dye, humidity control Agents, matting agents and the like.
[0074] 可塑剤は、トナーを定着する時の熱または圧力によって、トナー受容層が流動また は柔軟化するのを調整する機能を有する。可塑剤としては、「化学便覧」（日本化学 会編、丸善)や、「可塑剤 その理論と応用一」（村井孝一編著、幸書房)や、「可塑 剤の研究 上」「可塑剤の研究 下」（高分子化学協会編)や、「便覧 ゴム'プラスチ ック配合薬品」（ラバーダイジェスト社編)等を参考にして選択することができる。  [0074] The plasticizer has a function of adjusting the flow or softening of the toner receiving layer by heat or pressure when fixing the toner. Plasticizers include “Chemical Handbook” (edited by the Japan Chemical Society, Maruzen), “Plasticizers Theory and Application 1” (edited by Koichi Murai, Koshobo), “Research on Plasticizers”, “Research on Plasticizers” “Lower” (edited by Polymer Chemistry Association) and “Handbook rubber 'plastic compounded chemical” (edited by Rubber Digest Co., Ltd.).
[0075] また、フィラーとしては、榭脂用の補強剤、充填剤、強化材として公知のものが用い ることができ、有機及び無機のフィラーが好ましい。フィラーとしては、「便覧 ゴム'プ ラスチック配合薬品」（ラバーダイジェスト社編）、「新版 プラスチック配合剤 基礎と 応用」（大成社)、「フイラ一ハンドブック」（大成社)等を参考にして選択することができ る。  [0075] Further, as the filler, publicly known reinforcing agents for fillers, fillers, and reinforcing materials can be used, and organic and inorganic fillers are preferable. Select fillers with reference to "Handbook Rubber'Plastic Compounded Chemicals" (edited by Rubber Digest Co., Ltd.), "New Edition Plastic Compounding Basics and Applications" (Taiseisha), "Fila I Handbook" (Taisei Co., Ltd.), etc. be able to.
[0076] 架橋剤としては、反応基としてエポキシ基、イソシァネート基、アルデヒド基、活性ハ ロゲン基、活性メチレン基、アセチレン基、その他公知の反応基を 2個以上分子内に 持つ化合物が挙げられ、また、水素結合、イオン結合、配位結合等により結合を形成 することが可能な基を 2個以上持つ化合物も挙げられる。また、前記架橋剤としては、 榭脂用のカップリング剤、硬化剤、重合剤、重合促進剤、凝固剤、造膜剤、造膜助剤 、等で公知の化合物も挙げられる。  [0076] Examples of the crosslinking agent include compounds having two or more known reactive groups in the molecule, such as epoxy groups, isocyanate groups, aldehyde groups, active halogen groups, active methylene groups, acetylene groups, and the like as reactive groups. In addition, a compound having two or more groups capable of forming a bond by a hydrogen bond, an ionic bond, a coordination bond, or the like is also included. Examples of the crosslinking agent include known compounds such as a coupling agent for resin, a curing agent, a polymerization agent, a polymerization accelerator, a coagulant, a film forming agent, and a film forming aid.
[0077] 帯電調整剤としては、トナーの転写、付着等を調整し、電子写真用受容紙の帯電 接着を防止する等の目的で使用することができる。帯電調整剤としては、従来公知の 帯電防止剤、帯電調整剤がいずれも使用可能であり、カチオン界面活性剤、ァニォ ン系界面活性剤、両性界面活性剤、ノニオン系界面活性剤等の界面活性剤等の他 、高分子電解質、導電性金属酸化物等を使用できる。 [0078] 導電剤としては、 ZnO、 TiO、 SnO、 Al O、 In O、 SiO、 MgO、 BaO、 MoOな [0077] The charge adjusting agent can be used for the purpose of adjusting toner transfer, adhesion, etc., and preventing charging adhesion of electrophotographic receiving paper. As the charge control agent, conventionally known antistatic agents and charge control agents can be used, and surface active agents such as cationic surfactants, anionic surfactants, amphoteric surfactants, nonionic surfactants, etc. In addition to agents, polymer electrolytes, conductive metal oxides, and the like can be used. [0078] Examples of the conductive agent include ZnO, TiO, SnO, AlO, InO, SiO, MgO, BaO, and MoO.
2 2 2 3 2 3 2 3 どの金属酸ィ匕物などが挙げられる。これらは、一種単独で使用してもよいし、二種以 上を併用してもよい。  2 2 2 3 2 3 2 3 Examples of metal oxides. These may be used alone or in combination of two or more.
[0079] また、顔料としては、画質、特に白色度を改良する目的で、蛍光増白剤、白色顔料 、有色顔料、染料等が挙げられる。前記蛍光増白剤は、近紫外部に吸収を持ち、 40 0〜500nmに蛍光を発する化合物で、公知のものが使用される。蛍光増白剤として は、例えば、スチルベン系化合物、クマリン系化合物、ビフエ-ル系化合物、ベンゾ ォキサゾリン系化合物、ナフタルイミド系化合物、ピラゾリン系化合物、カルボスチリル 系化合物などが挙げられる。  [0079] Examples of the pigment include fluorescent whitening agents, white pigments, colored pigments, dyes and the like for the purpose of improving image quality, particularly whiteness. The fluorescent brightening agent is a compound that has absorption in the near ultraviolet region and emits fluorescence at 400 to 500 nm. Examples of the fluorescent brightener include stilbene compounds, coumarin compounds, biphenyl compounds, benzoxazoline compounds, naphthalimide compounds, pyrazoline compounds, carbostyryl compounds, and the like.
[0080] 染料としては、公知の種々の染料を用いることができ、例えば、油溶性染料などが 挙げられる。油溶性染料としては、アントラキノン系化合物、ァゾ系化合物などが挙げ られる。  [0080] Various known dyes can be used as the dye, and examples thereof include oil-soluble dyes. Examples of oil-soluble dyes include anthraquinone compounds and azo compounds.
[0081] 本発明に係るトナー受容層の白色度は、特に制限はなく目的に応じて適宜選択す ることができる力 高い方が好ましい。白色度としては、 CIE 1976 (L*a*b*)色空間 において L*値が 80以上が好ましぐ 85以上がより好ましぐ 90以上が特に好ましい。 また、白色の色味は、できるだけニュートラルであることが好ましい。白色の色味とし ては、 L*aV空間において (a*) 2+ (b*) 2の値力 50以下が好ましぐ 18以下がより好 ましぐ 5以下が特に好ましい。 [0081] The whiteness of the toner-receiving layer according to the present invention is not particularly limited, and it is preferable that the whiteness of the toner-receiving layer is high enough to be appropriately selected according to the purpose. As the whiteness, in the CIE 1976 (L * a * b *) color space, an L * value of 80 or more is preferred, 85 or more is more preferred, and 90 or more is particularly preferred. The white color is preferably as neutral as possible. As the white color, in the L * aV space, the value power of (a *) 2 + (b *) 2 is preferably 50 or less, more preferably 18 or less, and particularly preferably 5 or less.
[0082] 本発明に係るトナー受容層の平滑度は、特に制限はなく目的に応じて適宜選択す ることができるが、高い方が好ましい。また、平滑度としては、特に制限はなく目的に 応じて適宜選択することができるが、高い方が好ましい。平滑度としては、トナーが無 い白色力も最大濃度の黒色までの全領域において、算術平均粗さ (Ra)が 3 μ m以 下であるのが好ましぐ 1 μ m以下であるのがより好ましぐ 0. 5 m以下であるのが 特に好ましい。前記算術平均粗さは、 JIS B 0601、JIS B 0651、JIS B 0652 に基づ!/、て測定することができる。  [0082] The smoothness of the toner-receiving layer according to the present invention is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably higher. Further, the smoothness is not particularly limited and can be appropriately selected according to the purpose, but is preferably higher. In terms of smoothness, the arithmetic average roughness (Ra) is preferably 3 μm or less, preferably 1 μm or less, in all areas up to the maximum density of black even with white power without toner. It is particularly preferably 0.5 m or less. The arithmetic average roughness can be measured based on JIS B 0601, JIS B 0651, and JIS B 0652.
[0083] 本発明に係るトナー受容層における表面電気抵抗としては、 1 X 106〜1 X 1015 Ω ( 25°C、 65%RHの条件)であるのが好ましぐ本発明に係るトナー受容層以外のその 他の層における表面電気抵抗も 1 X 106〜1 X 1015 Ω (25°C、 65%RHの条件）であ るのが好ましい。 The surface electrical resistance in the toner receiving layer according to the present invention is preferably 1 × 10 6 to 1 × 10 15 Ω (25 ° C., 65% RH condition). The surface electrical resistance of other layers other than the receiving layer is also 1 X 10 6 to 1 X 10 15 Ω (25 ° C, 65% RH) It is preferable.
[0084] また、本発明に係るトナー受容層には、マット剤を添加できる。マット剤としては、特 に制限はなぐ目的に応じて適宜選択することができ、例えば、固体粒子などが挙げ られる。前記固体粒子としては、無機粒子と有機粒子とに分類できる。  In addition, a matting agent can be added to the toner receiving layer according to the present invention. The matting agent can be appropriately selected according to the purpose for which there is no particular limitation, and examples thereof include solid particles. The solid particles can be classified into inorganic particles and organic particles.
[0085] 《その他の構成層》  [0085] << Other constituent layers >>
本発明の電子写真受像材料においては、上記説明したトナー受容層と断熱層の他 に、その他の構成層を設けることができる。その他の構成層としては、特に制限はなく 、目的に応じて適宜選択することができるが、例えば、表面保護層、中間層、下塗り 層、クッション層、帯電調節 (防止)層、反射層、色味調製層、保存性改良層、接着防 止層、アンチカール層、平滑ィ匕層などが挙げられる。これらは、単層構造であっても よいし、積層構造であってもよい。支持体が反射性支持体であり、支持体上に本発明 に係るトナー受容層等が設けられる反射型の電子写真用受像材料である場合は、支 持体上の設ける各層は透明である必要はなぐむしろ白色であることが好ましい。  In the electrophotographic image receiving material of the present invention, in addition to the toner receiving layer and the heat insulating layer described above, other constituent layers can be provided. Other constituent layers are not particularly limited and may be appropriately selected depending on the intended purpose.For example, surface protective layers, intermediate layers, undercoat layers, cushion layers, charge control (prevention) layers, reflective layers, colors Examples include a taste preparation layer, a storage stability improving layer, an adhesion prevention layer, an anti-curl layer, and a smooth wrinkle layer. These may have a single layer structure or a laminated structure. When the support is a reflective support and is a reflective electrophotographic image receiving material in which the toner receiving layer according to the present invention is provided on the support, each layer provided on the support must be transparent. Rather it is preferably white.
[0086] 本発明の電子写真用受像材料の不透明度としては、 JIS P 8138に規定される方 法で測定した値力 85%以上が好ましぐ 90%以上がより好ましい。  The opacity of the electrophotographic image-receiving material of the present invention is preferably 90% or more, preferably 85% or more, measured by the method specified in JIS P 8138.
[0087] 本発明の電子写真用受像材料においては、裏面出力適性付与、裏面出力画質改 良、カールバランス改良、筆記性付与、インクジェット、その他のプリント適性付与、機 器通過性改良等の目的で、前記支持体における、前記受像層が設けられた側とは 反対側にバック層を設けることができる。また、前記バック層は、両面出力適性改良 のため、その構成が受像層側と同様であってもよい。該バック層には、前述の各種の 添加剤を用いることができ、特に前述のマット剤、滑り剤、帯電調整剤等を用いるの が好ましい。ノ ック層は、 1層であってもよいし、 2層以上であってもよい。また、定着 時のオフセット防止のため定着ローラー等に離型性オイルを用いている場合、裏面 にオイル吸収性を持たせることが好まし ヽ。  In the electrophotographic image-receiving material of the present invention, for the purposes of imparting backside output suitability, improving backside output image quality, improving curl balance, imparting writability, inkjet, other print suitability, and improving device passability. A back layer can be provided on the side of the support opposite to the side on which the image receiving layer is provided. Further, the back layer may have the same configuration as the image receiving layer side in order to improve the double-sided output suitability. In the back layer, the above-mentioned various additives can be used, and it is particularly preferable to use the above-mentioned matting agent, slip agent, charge adjusting agent and the like. The knock layer may be a single layer or two or more layers. In addition, if releasable oil is used for the fixing roller, etc., to prevent offset during fixing, it is preferable to have oil absorption on the back side.
[0088] 本発明の電子写真用受像材料においては、支持体、断熱層、トナー受容層と、そ の他の構成層との密着を改良する目的で、密着改良層を設けることができる。  In the electrophotographic image-receiving material of the present invention, an adhesion improving layer can be provided for the purpose of improving adhesion between the support, the heat insulating layer, the toner receiving layer and the other constituent layers.
[0089] 本発明の電子写真用受像材料には、出力画像の安定性改良、受像層自身の安定 性改良の目的で、各種の添加剤を用いることができる。このような添加剤としては、種 々の公知の酸化防止剤、老化防止剤、紫外線吸収剤、光安定剤、劣化防止剤、ォ ゾン劣化防止剤、防腐剤、防黴剤、などが挙げられる。 [0089] Various additives can be used in the electrophotographic image-receiving material of the present invention for the purpose of improving the stability of the output image and improving the stability of the image-receiving layer itself. Such additives include seeds Examples include various known antioxidants, anti-aging agents, ultraviolet absorbers, light stabilizers, deterioration inhibitors, ozone deterioration inhibitors, antiseptics, and antifungal agents.
[0090] 本発明の電子写真用受像紙は、電子写真方式により電子写真用トナーによる画像 形成に使用することができ、電子写真用カラートナーによるカラー画像形成に好適に 使用することができる。  The electrophotographic image-receiving paper of the present invention can be used for image formation with an electrophotographic toner by an electrophotographic system, and can be suitably used for color image formation with an electrophotographic color toner.
[0091] 《電子写真用トナー》  [0091] <Electrophotographic toner>
本発明に用いられるトナーは、公知の電子写真用のトナーであれば特に限定され ず、トナーの製造方法については粉砕法、重合法等、公知の製造方法であれば特 に限定されないが、本発明の効果を出すには、懸濁重合法や、必要な添加剤の乳 化液を加えた液中にて単量体を乳化重合し、微粒の重合体粒子を製造し、その後に 、有機溶媒、凝集剤等を添加して会合する製造方法であることが好ましい。会合の際 にはトナーの構成に必要な離型剤や着色剤などの分散液と混合して会合させて調 製する方法や、単量体中に離型剤や着色剤などのトナー構成成分を分散した上で 乳化重合する方法などが好ましく挙げられる。なお、ここでいう会合とは、榭脂粒子及 び着色剤粒子が複数個融着することを示す。  The toner used in the present invention is not particularly limited as long as it is a known electrophotographic toner, and the toner production method is not particularly limited as long as it is a known production method such as a pulverization method or a polymerization method. In order to obtain the effects of the invention, the monomer is emulsion-polymerized in a suspension polymerization method or in a liquid to which a necessary additive emulsion is added to produce fine polymer particles, and then organic A production method in which a solvent, a flocculant and the like are added to associate is preferable. At the time of association, a method of preparing by mixing with a dispersion liquid of a release agent or a colorant necessary for the composition of the toner and making it associate, or a toner constituent component such as a release agent or a colorant in the monomer A method in which emulsion polymerization is carried out after dispersing is preferred. Here, the term “association” means that a plurality of the resin particles and the colorant particles are fused.
[0092] 懸濁重合法の製造方法としては、特に限定されるものでは無いが、下記の様な製 造方法を上げることができる。  [0092] The production method of the suspension polymerization method is not particularly limited, but the following production method can be raised.
[0093] すなわち、重合性単量体中に着色剤や必要に応じて離型剤、荷電制御剤、さらに 重合開始剤等の各種構成材料を添加し、ホモジナイザー、サンドミル、サンドグライン ダー、超音波分散機などで重合性単量体に各種構成材料を溶解ある!ヽは分散させ る。この各種構成材料が溶解ある！ヽは分散された重合性単量体を分散安定剤を含 有した水系媒体中にホモミキサーやホモジナイザーなどを使用しトナーとしての所望 の大きさの油滴に分散させる。その後、撹拌機構が前述の撹拌翼である反応装置へ 移し、加熱することで重合反応を進行させる。反応終了後、分散安定剤を除去し、濾 過、洗浄し、さらに乾燥することで本発明のトナーを調製する。  [0093] That is, various constituent materials such as a colorant and, if necessary, a release agent, a charge control agent, and a polymerization initiator are added to the polymerizable monomer, and a homogenizer, sand mill, sand grinder, ultrasonic wave is added. Dissolve various constituent materials in the polymerizable monomer using a disperser. These various constituent materials are dissolved! In the soot, the dispersed polymerizable monomer is dispersed in oil droplets of a desired size as a toner in an aqueous medium containing a dispersion stabilizer using a homomixer or a homogenizer. Thereafter, the stirring mechanism is transferred to the above-described reaction apparatus which is a stirring blade, and the polymerization reaction is advanced by heating. After completion of the reaction, the dispersion stabilizer is removed, filtered, washed, and further dried to prepare the toner of the present invention.
[0094] また、本発明に係るトナーを製造する方法として、榭脂粒子を水系媒体中で融着さ せて調製する方法も挙げることができる。この方法としては、特に限定されるものでは 無いが、例えば、特開平 5— 265252号公報ゃ特開平 6— 329947号公報、特開平 9— 15904号公報に示す方法をあげることができる。すなわち、榭脂粒子と着色剤な どの構成材料の分散粒子、ある ヽは榭脂及び着色剤等より構成される微粒子を複数 以上会合させる方法、特に水中にてこれらを乳化剤を用いて分散した後に、臨界凝 集濃度以上の凝集剤を加え塩祈させると同時に、形成された重合体自体のガラス転 移点温度以上で加熱融着させ、その粒子を含水状態のまま流動状態で加熱乾燥す る事により、本発明のトナーを形成することができる。尚、ここにおいて凝集剤と同時 に水に対して無限溶解する有機溶媒を加えてもよい。 [0094] Further, as a method for producing the toner according to the present invention, a method in which the resin particles are prepared by fusing in an aqueous medium can also be mentioned. This method is not particularly limited. For example, JP-A-5-265252, JP-A-6-329947, and JP-A-6-329947. The method shown in the publication of 9-15904 can be mentioned. That is, dispersed particles of constituent materials such as rosin particles and coloring agents, or a certain method of associating a plurality of fine particles composed of rosin and coloring agents, in particular after dispersing these in water using an emulsifier Add a flocculant above the critical coagulation concentration for salt praying, and at the same time heat-fuse at a temperature above the glass transition temperature of the polymer itself, and heat and dry the particles in a fluid state while still containing water. As a result, the toner of the present invention can be formed. Here, an organic solvent which is infinitely soluble in water may be added simultaneously with the flocculant.
[0095] トナーの榭脂成分としては、公知の榭脂を用いることができる力 一般には、ポリエ ステル榭脂ゃスチレン一アクリル榭脂等を主に用いることができる。また、塗被層上に 画像を形成する場合には、塗被層に含まれる接着剤等の榭脂成分との相溶性の高 い榭脂をトナーの榭脂成分として選択することが好ましい。このような観点力もは、ト ナ一の樹脂成分としては、ポリエステル榭脂、スチレン一アクリル酸エステル榭脂、ス チレンーメタクリル酸エステル榭脂等の中から目的に応じて 1種或いは 2種以上の混 合物を使用することが好まし 、。  [0095] As the resin component of the toner, a power capable of using a known resin, in general, polyester resin, styrene-acrylic resin, etc. can be mainly used. When an image is formed on the coating layer, it is preferable to select a resin having high compatibility with a resin component such as an adhesive contained in the coating layer as the resin component of the toner. In terms of such a viewpoint, the resin component of toner includes one or more of polyester resin, styrene monoacrylate ester resin, styrene-methacrylate ester resin, etc. depending on the purpose. It is preferred to use a mixture of
[0096] トナーの体積平均粒子径は、 2〜10 μ mの範囲内であることが好ましぐ 3〜9 μ m の範囲内であることがより好ましい。トナーの体積平均粒子径カ 未満であると 、帯電性が不十分になり易ぐ現像性が低下する場合があり、一方、 を越える と、画像の解像性が低下する場合があるため、それぞれ好ましくない。  [0096] The volume average particle diameter of the toner is preferably in the range of 2 to 10 µm, more preferably in the range of 3 to 9 µm. If the volume average particle size of the toner is less than the charge average, the chargeability becomes insufficient and the developability tends to be lowered. On the other hand, if it exceeds, the resolution of the image may be lowered. It is not preferable.
実施例  Example
[0097] 以下、実施例を挙げて本発明を具体的に説明するが、本発明はこれらに限定され るものではない。なお、実施例において「部」あるいは「％」の表示を用いる力 特に 断りがない限り「質量部」ある!/、は「質量％」を表す。  [0097] Hereinafter, the present invention will be specifically described by way of examples, but the present invention is not limited thereto. In the examples, “part” or “%” is used as a force to indicate “part by mass” unless otherwise specified. “/” Represents “% by mass”.
[0098] 実施例 1 [0098] Example 1
《紙支持体の作製》  << Production of paper support >>
〔紙支持体 Aの作製〕  (Preparation of paper support A)
硫酸塩法晒広葉樹パルプ (LBKP) 90%、硫酸塩法晒針葉樹パルプ (NBSP) 10 %の配合パルプに、パルプに対し、カチオン澱粉 0. 7%、ァルケ-ル無水コハク酸 0 . 07%、重質炭酸カルシウム 20%、バンド 1%を添加して調製した原料を長網式抄 紙機で抄紙し、サイズプレスにぉ 、てポリアクリルアマイド及び表面サイズ剤としてァ ルキルケテンダイマーを含有した水溶液を乾燥固形量両面に 0. 9gZm2になるよう 処理し、乾燥後坪量 170gZm2の白色基紙 aを得た。 Sulfate bleached hardwood pulp (LBKP) 90%, Sulfate bleached softwood pulp (NBSP) 10% blended pulp, 0.7% cationic starch, 0.07% alkale succinic anhydride, Raw material prepared by adding 20% heavy calcium carbonate and 1% band. Paper is made with a paper machine, treated with a size press, an aqueous solution containing polyacrylamide and alkyl ketene dimer as a surface sizing agent on both sides of the dry solid to 0.9 gZm 2, and the basis weight after drying is 170 gZm 2 White base paper a was obtained.
[0099] 別に、カオリン 70%、軽質炭酸カルシウム 30%の配合物に、ポリアクリル酸ソーダ 0 . 1質量0 /0を加えて、コースレス分散機で分散して、 65%の白色顔料スラリーを調製 した。この白色顔料スラリーに、カゼイン 10%、スチレン ブタジエン共重合体ラテツ タス 10%をカ卩え、さらに、水をカ卩えて固形分濃度が 50%のコート層塗布液を調製し た。このコート層塗布液を白色基紙 aの表面側に乾燥質量で 20gZm2となるようにリ バースロールコーターで塗布し、次いで、 100°Cのキャストドライヤーを用いて圧接乾 燥して、キャストコート紙である紙支持体 Aを作製した。 [0099] Separately, 70% kaolin, 30% of the formulation precipitated calcium carbonate, sodium polyacrylate 0. By adding 1 mass 0/0, and dispersed in the course less disperser, 65% of white pigment slurry Prepared. To this white pigment slurry, 10% casein and 10% styrene-butadiene copolymer latus were added, and further water was added to prepare a coating layer coating solution having a solid content concentration of 50%. This coating layer coating solution is applied to the surface side of the white base paper a with a reverse roll coater so that the dry mass becomes 20 gZm 2, and then press-dried using a cast dryer at 100 ° C. Paper support A, which is paper, was prepared.
[0100] 〔紙支持体 Bの作製〕  [Preparation of paper support B]
50%の硫酸塩法晒広葉樹パルプ (LBKP)と、 50%の硫酸塩法晒針葉樹パルプ（ NBSP)力 なる坪量 150gZm2の白色基紙 bを用意した。 A white base paper b having a basis weight of 150 gZm 2 having 50% sulfate-method bleached hardwood pulp (LBKP) and 50% sulfate-method bleached softwood pulp (NBSP) was prepared.
[0101] この白色基紙 bの裏面に、裏面榭脂層として密度 0. 935gZcm3、軟ィ匕点 110°Cの 中密度ポリエチレンを 300°Cにて溶融押し出しコーティングを行って 25g/m2の裏面 榭脂層を被覆させた。 [0101] On the back side of this white base paper b, a medium density polyethylene with a density of 0.935 gZcm 3 and a soft melting point of 110 ° C was melt-extruded at 300 ° C as a backside resin layer, and 25 g / m 2 The back surface of the resin layer was coated with a resin layer.
[0102] 次に、表面側に表面榭脂層として、密度 0. 920g/cm3,軟ィ匕点 105°Cの低密度 ポリエチレン 91%、ルチル型酸化チタン 9%を混練した後、 300°Cにて溶融押し出し コーティングにより 28gZm2の表面榭脂層を被覆させ、両面に榭脂被覆層を有する 紙支持体 Bを作製した。 [0102] Next, as a surface resin layer on the surface side, after blending 91% low-density polyethylene with a density of 0.920 g / cm 3 , soft point 105 ° C, and 9% rutile titanium oxide, 300 ° A surface support layer of 28 gZm 2 was coated by melt extrusion coating with C to prepare a paper support B having a surface coating layer on both sides.
[0103] 〔紙支持体 Cの作製〕  [Preparation of paper support C]
前記白色基紙の裏面に、裏面榭脂層として密度 0. 965gZcm3、軟ィ匕点 133°Cの 高密度ポリエチレンを 300°Cにて溶融押し出しコーティングを行って、 25g/m2の裏 面榭脂層を被覆させた。 On the back side of the white base paper, a high-density polyethylene with a density of 0.965 gZcm 3 and a soft scoring point of 133 ° C was melt-extruded at 300 ° C as a backside resin layer, and the back side was 25 g / m 2 The greaves layer was coated.
[0104] 次に、表面側に表面榭脂層として、密度 0.
Figure imgf000018_0001
軟化点 124°Cの高密度 ポリエチレンを 55%、密度 0. 920gZcm3、軟化点 105°Cの低密度ポリエチレンを 3 6%、ルチル型酸化チタンを 9%混練した後、 300°Cにて溶融押出コーティングにより 28gZm2の表面榭脂層を被覆させ、両面に榭脂被覆層を有する紙支持体 Cを作製 した。 [0104] Next, as a surface resin layer on the surface side, a density of 0.
Figure imgf000018_0001
High-density polyethylene with a softening point of 124 ° C 55%, density 0.920gZcm 3 , 36% of low-density polyethylene with a softening point 105 ° C of 36%, 9% of rutile titanium oxide, then melted at 300 ° C Paper support C with a 28gZm 2 surface resin layer coated by extrusion coating on both sides is prepared. did.
[0105] 〔紙支持体 Dの作製〕  [Preparation of paper support D]
前記白色基紙 bの裏面に、裏面榭脂層として密度 0. 965g/cm3、軟化点 133°C の高密度ポリエチレンを 300°Cにて溶融押し出しコーティングを行って、 25g/m2の 裏面榭脂層を被覆させた。 On the back side of the white base paper b, a high-density polyethylene with a density of 0.965 g / cm 3 and a softening point of 133 ° C was melt-extruded at 300 ° C as a backside resin layer, and the back side of 25 g / m 2 The greaves layer was coated.
[0106] 次に、表面側に表面榭脂層として、密度 0.
Figure imgf000019_0001
軟化点 123°Cの高密度 ポリエチレン 91%、ルチル型酸ィ匕チタン 9%を混練した後に 300°Cにて溶融押出コ 一ティングにより 28gZm2の表面榭脂層を被覆させ、両面に榭脂被覆層を有する紙 支持体 Dを作製した。 [0106] Next, as a surface resin layer on the surface side, a density of 0.
Figure imgf000019_0001
After kneading 91% high-density polyethylene with a softening point of 123 ° C and 9% rutile-type acid-titanium titanium, coat it with a surface resin layer of 28gZm 2 at 300 ° C by melt extrusion coating, A paper support D having a coating layer was prepared.
[0107] 〔紙支持体 Eの作製〕 [Preparation of paper support E]
前記白色基紙 bの裏面に、裏面榭脂層として密度 0. 955g/cm3,軟化点 126°C の高密度ポリエチレンを 300°Cにて溶融押し出しコーティングを行って、 25g/m2の 裏面榭脂層を被覆させた。 On the back side of the white base paper b, a high-density polyethylene with a density of 0.955 g / cm 3 and a softening point of 126 ° C was melt-extruded at 300 ° C as a backside resin layer, and a backside of 25 g / m 2 The greaves layer was coated.
[0108] 次に、表面側に表面榭脂層として、密度 0. 952g/cm3,軟ィ匕点 124°Cの高密 度ポリエチレン 85%、アナターゼ型酸化チタン 15%を混練した後、 300°Cにて溶融 押し出しコーティングにより 27g/m2の表面榭脂層を被覆させ、両面に榭脂被覆層 を有する紙支持体 Eを作製した。 [0108] Next, as a surface resin layer on the surface side, 85% high-density polyethylene having a density of 0.9952 g / cm 3 , soft point 124 ° C and 15% anatase-type titanium oxide were kneaded, and then 300 ° 27 g / m 2 of the surface resin layer was coated by melt extrusion coating with C, and a paper support E having a resin coating layer on both sides was produced.
[0109] 〔紙支持体 Fの作製〕 [Preparation of paper support F]
前記白色基紙 bの表裏に、密度 0. 952g/cm3,軟化点 124°Cの高密度ポリエチレ ン榭脂を、最初に裏面側に 20g/m2、次に表面側に 25g/m2をそれぞれ 300°Cに て溶融押し出しコーティングを行 ヽ、両面に榭脂被覆層を有する紙支持体 Fを作製し た。 On the front and back of the white base paper b, a high-density polyethylene resin with a density of 0.9952 g / cm 3 and a softening point of 124 ° C, is first 20 g / m 2 on the back side and then 25 g / m 2 on the front side. Each was subjected to melt extrusion coating at 300 ° C. to prepare a paper support F having a resin coating layer on both sides.
[0110] 〔紙支持体 Gの作製〕  [0110] [Preparation of paper support G]
前記白色基紙 bの裏面に、裏面榭脂層として密度 0.
Figure imgf000019_0002
軟化点 126°C の高密度ポリエチレンを、 300°Cにて溶融押し出しコーティングを行って 30g/m2の 裏面榭脂層を被覆させた。 On the back side of the white base paper b, the density is 0.
Figure imgf000019_0002
High density polyethylene with a softening point of 126 ° C was melt extrusion coated at 300 ° C to coat a 30 g / m 2 backside resin layer.
[0111] 次に、表面側に表面榭脂層として、密度 0. 920g/cm3,軟化点 101°Cの低密度 ポリエチレン 80%、密度 0. 949gZcm3、軟化点 123°Cの高密度ポリエチレン 12%、 ルチル型酸化チタン 8%を混練した後、 300°Cにて溶融押し出しコーティングにより 3 6g/m2の表面榭脂層を被覆させ、両面に榭脂被覆層を有する紙支持体 Gを作製し た。 [0111] Next, as a surface resin layer on the surface side, low density polyethylene 80% with a density of 0.920 g / cm 3 and a softening point of 101 ° C, high density polyethylene with a density of 0.949 gZcm 3 and a softening point of 123 ° C 12% After kneading 8% rutile-type titanium oxide, a 36 g / m 2 surface resin layer was coated by melt extrusion coating at 300 ° C. to prepare a paper support G having a resin coating layer on both sides. .
[0112] 〔紙支持体 Hの作製〕  [0112] [Preparation of paper support H]
前記白色基紙 bの裏面に、裏面榭脂層として密度 0.
Figure imgf000020_0001
軟化点 126°C の中密度ポリエチレンを 300°Cにて溶融押し出しコーティングを行って、 35g/m2の 裏面榭脂層を被覆させた。 On the back side of the white base paper b, the density is 0.
Figure imgf000020_0001
Medium density polyethylene with a softening point of 126 ° C was melt extruded at 300 ° C to coat a 35 g / m 2 backside resin layer.
[0113] 次に、表面側に表面榭脂層として、密度 0. 920g/cm3,軟ィ匕点 105°Cの低密度 ポリエチレン 92%、ルチル型酸化チタン 8%を混練した後、 300°Cにて溶融押し出し コーティングにより 47gZm2の表面榭脂層を被覆させ、両面に榭脂被覆層を有する 紙支持体 Hを作製した。 [0113] Next, as a surface resin layer on the surface side, low density polyethylene 92% with a density of 0.920 g / cm 3 , soft soft point 105 ° C, kneaded with 92% rutile titanium oxide, 300 ° 47 gZm 2 of the surface resin layer was coated by melt extrusion coating with C, and a paper support H having a resin coating layer on both sides was produced.
[0114] 〔紙支持体 Iの作製〕 [0114] [Production of paper support I]
前記白色基紙 bの裏面に、裏面榭脂層として密度 0. 935g/cm3,軟ィ匕点 110°C の中密度ポリエチレンを 300°Cにて溶融押し出しコーティングを行って、 40g/m2の 裏面榭脂層を被覆させた。 Wherein the back surface of a white base paper b, density 0. 935 g / cm 3 as the back榭脂layer, by performing a melt extrusion coating density polyethylene in the軟I匕点110 ° C at 300 ° C, 40g / m 2 The back surface of the resin layer was coated.
[0115] 次に、表面側に表面榭脂層として、密度 0. 920g/cm3,軟ィ匕点 105°Cの低密度 ポリエチレン 89%、アナターゼ型酸化チタン 11%を混練した後、 300°Cにて溶融押 し出しコーティングにより 50gZm2の表面榭脂層を被覆させ、両面に榭脂被覆層を 有する紙支持体 Iを作製した。 [0115] Next, as a surface resin layer on the surface side, 89% low density polyethylene having a density of 0.920 g / cm 3 , soft soft point 105 ° C, and 11% anatase-type titanium oxide were kneaded, and then 300 ° A paper support I having a surface coating layer of 50 gZm 2 coated on the both sides by melt extrusion coating with C was prepared.
[0116] 〔紙支持体 Jの作製〕 [0116] [Preparation of paper support J]
前記白色基紙 bの表裏に、密度 0. 915g/cm3、軟ィ匕点 150°Cのポリプロピレン榭 脂を、最初に裏面側に 20g/m2、次に表面側に 25g/m2をそれぞれ 300°Cにて溶 融押し出しコーティングを行い、両面にポリプレン榭脂被覆層を有する紙支持体 Jを 作製した。 On the front and back of the white base paper b, a polypropylene resin with a density of 0.915 g / cm 3 and a soft scoring point of 150 ° C, first 20 g / m 2 on the back side and then 25 g / m 2 on the front side. Each was subjected to melt extrusion coating at 300 ° C to prepare a paper support J having a polypropylene resin coating layer on both sides.
[0117] 〔紙支持体 Kの作製〕 [0117] [Preparation of paper support K]
前記白色基紙 bの表裏に、密度 1. 390g/cm3、軟ィ匕点 250°Cのポリエチレンテレ フタレート榭脂を、最初に裏面側に 20gZm2、次に表面側に 25gZm2をそれぞれ 32The front and back of the white base paper b, density 1. 390 g / cm 3, a polyethylene terephthalate phthalate榭脂of軟I匕点250 ° C, respectively first 20GZm 2 on the back side, then the surface side 25GZm 2 to 32
0°Cにて溶融押し出しコーティングを行い、両面にポリエチレンテレフタレート榭脂被 覆層を有する紙支持体 Kを作製した。 Perform melt extrusion coating at 0 ° C, and cover both sides with polyethylene terephthalate resin A paper support K having a covering layer was produced.
[0118] 〔紙支持体 Lの作製〕 [0118] [Preparation of paper support L]
前記白色基紙 bの表裏に、密度 0. 840g/cm3、軟ィ匕点 176°Cのポリメチルペンテ ン榭脂を、最初に裏面側に 20gZm2、次に表面側に 25gZm2をそれぞれ 320°Cに て溶融押し出しコーティングを行 ヽ、両面にポリメチルペンテン榭脂被覆層を有する 紙支持体 Lを作製した。 The front and back of the white base paper b, density 0. 840 g / cm 3, a Porimechirupente down榭脂of軟I匕点176 ° C, initially 20GZm 2 on the back side, then the surface side 25GZm 2, respectively A melt-extrusion coating was performed at 320 ° C, and a paper support L having a polymethylpentene resin coating layer on both sides was produced.
[0119] 《電子写真受像材料の作製》 [0119] <Production of electrophotographic image-receiving material>
〔試料 101の作製〕  (Preparation of sample 101)
紙支持体 Aのコート層塗布を施した表側に、常法に従ってコロナ放電処理を施した 後、熱可塑性榭脂からなるトナー受容層 aを、下記のトナー受容層 a塗布液をワイヤ 一バーを用いて、乾燥後の膜厚が 15 111となるように塗布、乾燥して、試料 101を作 製した。  After the corona discharge treatment is applied to the front side of the paper support A coated layer according to a conventional method, the toner receiving layer a made of thermoplastic resin is applied, and the following toner receiving layer a coating solution is applied to the wire bar. The sample 101 was prepared by coating and drying so that the film thickness after drying was 15 111.
[0120] (トナー受容層 a塗布液）  [0120] (Toner-receiving layer a coating solution)
ポリエステル水分散液 (東洋紡バイロナール MD— 1100、固形分濃度 30%)  Polyester aqueous dispersion (Toyobo Vylonal MD-1100, solid content 30%)
50%  50%
ジォクチル ·スルホ琥珀酸ナトリウム水溶液（固形分濃度 1 %) 10% ポリエチレンォキシド（明成化学製アルコックス E30) 1% 水 39%  Dioctyl sodium sulfosuccinate aqueous solution (solid concentration 1%) 10% Polyethylene oxide (Malsei Chemical Alcox E30) 1% Water 39%
〔試料 102の作製〕  (Preparation of sample 102)
紙支持体 Bの表榭脂層側に、常法に従ってコロナ放電処理を施した後、ゼラチンか らなるアンカー層 aを乾燥膜厚が 0. 1 μ mとなる条件で塗布した後、試料 101と同様 に前記トナー受容層 a塗布液を同条件で塗布、乾燥して、試料 102を作製した。  After the corona discharge treatment was performed on the surface of the surface of the paper support B according to a conventional method, an anchor layer a made of gelatin was applied under the condition that the dry film thickness was 0.1 μm. Similarly, the toner receiving layer a coating solution was applied under the same conditions and dried to prepare Sample 102.
[0121] 〔試料 103の作製〕 [0121] [Production of sample 103]
紙支持体 Bの表榭脂層側に、常法に従ってコロナ放電処理を施した後、ゼラチンか らなるアンカー層 aを乾燥膜厚が 0.： L mとなる条件で塗布した後、下記の中空粒子 力もなる断熱層 a塗布液を乾燥後の平均膜厚が 30 mとなるようにワイヤーバーで 塗布、乾燥して、試料 103を作製した。  After the corona discharge treatment is performed on the surface resin layer side of the paper support B according to a conventional method, the anchor layer a made of gelatin is applied under the condition that the dry film thickness is 0. Heat insulation layer having hollow particle force aSample 103 was prepared by applying and drying the coating solution with a wire bar so that the average film thickness after drying was 30 m.
[0122] (断熱層 a塗布液） 中空粒子分散液（日本ゼオン製 MH8101、固形分濃度 26. 5%) 40% アルカリ処理ゼラチン 3% [0122] (Insulation layer a coating solution) Hollow particle dispersion (manufactured by Nippon Zeon MH8101, solid concentration 26.5%) 40% alkali-treated gelatin 3%
2, 4—ジクロロ一 6—ヒドロキシ一 S—トリァジン'ナトリウム水溶液（固形分濃度 4%)  2, 4-dichloro-6-hydroxy S-triazine sodium solution (solid content 4%)
2%  2%
ジォクチル ·スルホ琥珀酸ナトリウム水溶液（固形分濃度 1 %) 10% 水 45%  Dioctyl sodium sulfosuccinate aqueous solution (1% solid content) 10% Water 45%
なお、上記断熱層 aの空隙率は、 63%であった。  The porosity of the heat insulating layer a was 63%.
[0123] 〔試料 104の作製〕 [Preparation of Sample 104]
紙支持体 Bの表榭脂層側に、常法に従ってコロナ放電処理を施した後、ゼラチンか らなるアンカー層 aを乾燥膜厚 0. ： L mとなる条件で塗布した後、前記断熱層 a塗布 液を用い、乾燥後の平均膜厚が 30 mとなるようにワイヤーバーで塗布、乾燥した 後、下記のアクリル榭脂からなるトナー受容層 b塗布液を、乾燥後の平均膜厚が 5 mとなるようにワイヤーバーで塗布、乾燥して試料 104を作製した。  After the corona discharge treatment is performed on the surface resin layer side of the paper support B according to a conventional method, the anchor layer a made of gelatin is applied under the condition that the dry film thickness is 0. a After applying and drying with a wire bar so that the average film thickness after drying is 30 m using a coating liquid, the toner receiving layer consisting of the following acrylic resin b The average film thickness after drying is applied A sample 104 was prepared by coating with a wire bar and drying to 5 m.
[0124] (トナー受容層 b塗布液） [0124] (Toner-receiving layer b coating solution)
アクリル榭脂水溶液 (二チゴー ·モビニール社製 ·モビニール 743、固形分濃度 43 %) 40%  Acrylic rosin aqueous solution (NichigoMolvinylMolvinyl 743, solid content 43%) 40%
アルカリ処理ゼラチン 2%  Alkaline treated gelatin 2%
2, 4—ジクロロ一 6—ヒドロキシ一 S—トリァジン'ナトリウム水溶液（固形分濃度 4%)  2, 4-dichloro-6-hydroxy S-triazine sodium solution (solid content 4%)
1%  1%
ジォクチル ·スルホ琥珀酸ナトリウム水溶液（固形分濃度 1 %) 15% 水 42%  Dioctyl sodium sulfosuccinate aqueous solution (solid concentration 1%) 15% Water 42%
〔試料 105の作製〕  (Preparation of sample 105)
紙支持体 Bの表榭脂層側に、常法に従ってコロナ放電処理を施した後、ゼラチンか らなるアンカー層 aを乾燥膜厚 0. ： L mとなる条件で塗布した後、前記断熱層 a塗布 液を用いて、乾燥後の平均膜厚が 30 mとなるようにワイヤーバーで塗布、乾燥した 後、下記のアクリル榭脂からなるトナー受容層 c塗布液を、乾燥後の平均膜厚が 5 mとなるようにワイヤーバーで塗布、乾燥して試料 105を作製した。  After the corona discharge treatment is performed on the surface resin layer side of the paper support B according to a conventional method, the anchor layer a made of gelatin is applied under the condition that the dry film thickness is 0. a After applying and drying with a wire bar so that the average film thickness after drying is 30 m using the coating liquid, the toner receiving layer consisting of the following acrylic resin c The average film thickness after drying the coating liquid The sample 105 was prepared by coating with a wire bar and drying so as to be 5 m.
[0125] (トナー受容層 c塗布液） アクリル榭脂水溶液 (二チゴー ·モビニール社製 ·モビニール 743、固形分濃度 43 %) 40% [0125] (Toner-receiving layer c coating solution) Acrylic rosin aqueous solution (NichigoMolvinylMolvinyl 743, solid content 43%) 40%
アルカリ処理ゼラチン 2%  Alkaline treated gelatin 2%
2, 4—ジクロロ一 6—ヒドロキシ一 S—トリァジン'ナトリウム水溶液（固形分濃度 4%)  2, 4-dichloro-6-hydroxy S-triazine sodium solution (solid content 4%)
1%  1%
ジォクチル ·スルホ琥珀酸ナトリウム水溶液（固形分濃度 1 %) 15% カルナバワックス ·エマルシヨン水溶液 (中京油脂製 ·セロゾール 524、有効成分濃 度 30%) 10%  Dioctyl sodium sulfosuccinate aqueous solution (solid concentration 1%) 15% Carnauba wax Emulsion aqueous solution (manufactured by Chukyo Yushi ・ Cerosol 524, active ingredient concentration 30%) 10%
水 32%  Water 32%
〔試料 106〜試料 115の作製〕  [Preparation of Sample 106 to Sample 115]
上記試料 105の作製にぉ 、て、紙支持体 Bを表 1に示す各紙支持体に変更した以 外は同様にして、試料 106〜試料 115を作製した。  Sample 106 to Sample 115 were prepared in the same manner as Sample 105 except that the paper support B was changed to each paper support shown in Table 1.
[0126] 〔試料 116の作製〕 [Preparation of Sample 116]
紙支持体 Dの表榭脂層側に、常法に従ってコロナ放電処理を施した後、ゼラチン 力 なるアンカー層 aを乾燥膜厚 0.： mとなる条件で塗布した後、下記の中空粒子 力もなる断熱層 b塗布液を、乾燥後の平均膜厚が 35 mとなるようにワイヤーバーで 塗布、乾燥して、更に前記アクリル榭脂からなるトナー受容層 c塗布液を乾燥後の平 均膜厚が 5 μ mとなるようにワイヤーバーで塗布、乾燥して試料 116を作製した。  After the corona discharge treatment is performed on the surface of the surface support layer D of the paper support D according to a conventional method, an anchor layer a having a gelatin strength is applied under the condition of a dry film thickness of 0: m, and the following hollow particle force is also applied. The coating layer is coated with a wire bar so that the average film thickness after drying is 35 m, dried, and then the toner-receiving layer made of the above acrylic resin c The average film after drying the coating liquid Sample 116 was prepared by coating with a wire bar and drying to a thickness of 5 μm.
[0127] (断熱層 b塗布液） [0127] (Insulation layer b coating solution)
中空粒子分散液（日本ゼオン製 MH5055、固形分濃度 30%) 40% アルカリ処理ゼラチン 3%  Hollow particle dispersion (manufactured by Nippon Zeon MH5055, solid concentration 30%) 40% Alkali-treated gelatin 3%
2, 4—ジクロロ一 6—ヒドロキシ一 S—トリァジン'ナトリウム水溶液（固形分濃度 4%)  2, 4-dichloro-6-hydroxy S-triazine sodium solution (solid content 4%)
2%  2%
ジォクチル ·スルホ琥珀酸ナトリウム水溶液（固形分濃度 1 %) 10% 水 45%  Dioctyl sodium sulfosuccinate aqueous solution (1% solid content) 10% Water 45%
なお、上記断熱層 bの空隙率は、 56%であった。  The porosity of the heat insulating layer b was 56%.
[0128] 〔試料 117、 118作製〕 [Samples 117 and 118]
前記試料 116の作製において、紙支持体 Dを紙支持体 G、 Hにそれぞれ変更した 以外は同様にして、試料 117、試料 118を作製した。 In the preparation of the sample 116, the paper support D was changed to the paper supports G and H, respectively. Sample 117 and sample 118 were produced in the same manner except for the above.
[0129] 〔試料 119作製〕 [Sample 119 production]
紙支持体 Dの表榭脂層側に、常法に従ってコロナ放電処理を施した後、ゼラチン 力 なるアンカー層 aを乾燥膜厚 0.： mとなる条件で塗布した後、下記の中空粒子 力もなる断熱層 c塗布液を、乾燥後の平均膜厚が 35 mとなるようにワイヤーバーで 塗布、乾燥して、更に前記アクリル榭脂からなるトナー受容層 c塗布液を乾燥後の平 均膜厚が 5 mとなるようにワイヤーバーで塗布、乾燥して試料 119を作製した。  After the corona discharge treatment is performed on the surface of the surface support layer D of the paper support D according to a conventional method, an anchor layer a having a gelatin strength is applied under the condition of a dry film thickness of 0: m, and the following hollow particle force is also applied. Heat-insulating layer c The coating liquid is applied with a wire bar so that the average film thickness after drying is 35 m, dried, and then the toner-receiving layer consisting of the acrylic resin c The average film after drying the coating liquid Sample 119 was prepared by coating with a wire bar and drying to a thickness of 5 m.
[0130] (断熱層 c塗布液） [0130] (Insulation layer c coating solution)
中空粒子分散液（日本ゼオン製 MH5055、固形分濃度 30%) 40% ポリビニルアルコール（平均重合度 3500) 3%  Hollow particle dispersion (manufactured by Nippon Zeon MH5055, solid content concentration 30%) 40% Polyvinyl alcohol (average polymerization degree 3500) 3%
ホウ酸 ·ホウ砂 = 1Z1 (1%溶液） 1%  Boric acid · borax = 1Z1 (1% solution) 1%
ジォクチル ·スルホ琥珀酸ナトリウム水溶液（固形分濃度 1 %) 10% 水 46%  Dioctyl sodium sulfosuccinate aqueous solution (solid content 1%) 10% Water 46%
なお、上記断熱層 cの空隙率は、 50%であった。  The porosity of the heat insulating layer c was 50%.
[0131] 〔試料 120作製〕 [0131] [Sample 120 preparation]
紙支持体 Dの表榭脂層側に、常法に従ってコロナ放電処理を施した後、ゼラチン 力 なるアンカー層 aを乾燥膜厚 0.： mとなる条件で塗布した後、下記の中空粒子 力もなる断熱層 d塗布液を、乾燥後の平均膜厚が 25 mとなるようにワイヤーバーで 塗布、乾燥して、更に前記アクリル榭脂からなるトナー受容層 c塗布液を乾燥後の平 均膜厚が 5 mとなるようにワイヤーバーで塗布、乾燥して試料 120を作製した。  After the corona discharge treatment is performed on the surface of the surface support layer D of the paper support D according to a conventional method, an anchor layer a having a gelatin strength is applied under the condition of a dry film thickness of 0: m, and the following hollow particle force is also applied. Heat-insulating layer d Apply the coating liquid with a wire bar so that the average film thickness after drying is 25 m, and then dry the toner-receiving layer made of the acrylic resin c Average film after drying the coating liquid Sample 120 was prepared by coating with a wire bar and drying to a thickness of 5 m.
[0132] (断熱層 d塗布液） [0132] (Insulation layer d coating solution)
球形多孔質シリカ粒子（富士シリシァ化学製サイロスフィァ 1501) 20% アルカリ処理ゼラチン 5%  Spherical porous silica particles (Fuji Silysia Chemical's Pyrosphere 1501) 20% Alkali-treated gelatin 5%
2, 4—ジクロロ一 6—ヒドロキシ一 S—トリァジン'ナトリウム水溶液（固形分濃度 4%)  2, 4-dichloro-6-hydroxy S-triazine sodium solution (solid content 4%)
1%  1%
ジォクチル ·スルホ琥珀酸ナトリウム水溶液（固形分濃度 1 %) 5% 水 69%  Dioctyl sodium sulfosuccinate aqueous solution (solid content 1%) 5% Water 69%
なお、上記断熱層 dの空隙率は、 62%であった。 [0133] 〔試料 121作製〕 The porosity of the heat insulating layer d was 62%. [Sample 133 preparation]
紙支持体 Dの表榭脂層側に、常法に従ってコロナ放電処理を施した後、ゼラチン 力 なるアンカー層 aを乾燥膜厚 0.： mとなる条件で塗布した後、前記の中空粒子 力もなる断熱層 a塗布液を用い、乾燥後の平均膜厚が 30 mとなるようにワイヤーバ 一で塗布、乾燥して、更に下記のアクリル榭脂からなるトナー受容層 d塗布液を、乾 燥後の平均膜厚が 7 mとなるようにワイヤーバーで塗布、乾燥して試料 121を作製 した。  After the corona discharge treatment is performed on the surface resin layer side of the paper support D according to a conventional method, the gelatin layer anchor layer a is applied under the condition that the dry film thickness is 0. Heat-insulating layer a Using the coating solution, coat with a wire bar so that the average film thickness after drying is 30 m, dry, and then dry the toner-receiving layer consisting of the following acrylic resin d coating solution Sample 121 was prepared by coating with a wire bar and drying so that the average film thickness was 7 m.
[0134] (トナー受容層 d塗布液）  [Toner receiving layer d coating solution]
アクリル榭脂水溶液 (二チゴー ·モビニール社製 ·モビニール 743、固形分濃度 43 %) 40%  Acrylic rosin aqueous solution (NichigoMolvinylMolvinyl 743, solid content 43%) 40%
アルカリ処理ゼラチン 2%  Alkaline treated gelatin 2%
2, 4—ジクロロ一 6—ヒドロキシ一 S—トリァジン'ナトリウム水溶液（固形分濃度 4%)  2, 4-dichloro-6-hydroxy S-triazine sodium solution (solid content 4%)
1%  1%
ジォクチル ·スルホ琥珀酸ナトリウム水溶液（固形分濃度 1 %) 15% モンタン酸エステルワックス ·エマルシヨン水溶液 (中京油脂衡 - 206、有効成分濃 度 30%) 10%  Dioctyl sodium sulfosuccinate aqueous solution (solid concentration 1%) 15% Montanate ester wax Emulsion aqueous solution (Chukyo Oil & Chemicals-206, active ingredient concentration 30%) 10%
水 32%  Water 32%
t試料 122作製〕  t Sample 122 production)
上記試料 121において、紙支持体 Dを紙支持体 Hに変更した以外は同様にして、 試料 121を作製した。  Sample 121 was produced in the same manner as in Sample 121 except that paper support D was changed to paper support H.
[0135] 〔試料 123作製〕 [Sample 135 preparation]
紙支持体 Dの表榭脂層側に、常法に従ってコロナ放電処理を施した後、ゼラチン 力 なるアンカー層 aを乾燥膜厚 0.： mとなる条件で塗布した後、前記の中空粒子 力もなる断熱層 a塗布液を用いて、乾燥後の平均膜厚が 30 mとなるようにワイヤー バーで塗布、乾燥して、更に下記のアクリル榭脂からなるトナー受容層 e塗布液を、 乾燥後の平均膜厚が 7 mとなるようにワイヤーバーで塗布、乾燥して試料 123を作 製した。  After the corona discharge treatment is performed on the surface resin layer side of the paper support D according to a conventional method, the gelatin layer anchor layer a is applied under the condition that the dry film thickness is 0. Heat-insulating layer a Using a coating solution, coat with a wire bar so that the average film thickness after drying is 30 m, and then dry the toner-receiving layer consisting of the following acrylic resin. Sample 123 was prepared by coating with a wire bar and drying so that the average film thickness of the film became 7 m.
[0136] (トナー受容層 e塗布液） アクリル榭脂水溶液 (二チゴー ·モビニール社製 ·モビニール 747、固形分濃度 43 %) 40% [0136] (Toner-receiving layer e coating solution) Acrylic oil / fat aqueous solution (NichigoMolevinyl Ltd.Movinyl 747, solid content 43%) 40%
アルカリ処理ゼラチン 2%  Alkaline treated gelatin 2%
2, 4 ジクロロ一 6 ヒドロキシ一 S トリァジン'ナトリウム水溶液（固形分濃度 4%)  2, 4 Dichloro 1-6 Hydroxy 1 S Triazine 'Sodium aqueous solution (Solid content concentration 4%)
1%  1%
ジォクチル ·スルホ琥珀酸ナトリウム水溶液（固形分濃度 1 %) 15% ポリエチレンワックス ·エマルシヨン水溶液 (中京油脂製ポリロン L 788、有効成分濃 度 31%) 10%  Dioctyl sodium sulfosuccinate aqueous solution (solid concentration 1%) 15% Polyethylene wax Emulsion aqueous solution (Polylon L 788 made by Chukyo Yushi), active ingredient concentration 31%) 10%
水 32%  Water 32%
t試料 124作製〕  t Preparation 124)
紙支持体 Dの表榭脂層側に、常法に従ってコロナ放電処理を施した後、ゼラチン 力 なるアンカー層 aを乾燥膜厚 0. ： mとなる条件で塗布した後、前記の中空粒子 力もなる断熱層 a塗布液を用いて、乾燥後の平均膜厚が 30 mとなるようにワイヤー バーで塗布、乾燥して、更に下記のアクリル榭脂からなるトナー受容層 f塗布液を乾 燥後の平均膜厚が 10 mとなるようにワイヤーバーで塗布、乾燥して試料 124を作 製した。  After the corona discharge treatment is performed on the surface resin layer side of the paper support D according to a conventional method, the gelatin layer anchor layer a is applied under the condition that the dry film thickness is 0. Heat-insulating layer a Apply with a wire bar using a coating solution so that the average film thickness after drying is 30 m, and then dry the toner receiving layer consisting of the following acrylic resin after drying the coating solution Sample 124 was prepared by coating with a wire bar and drying so that the average film thickness of the film was 10 m.
(トナー受容層 f塗布液）  (Toner-receiving layer f coating solution)
スチレン ·アクリル榭脂水溶液（二チゴ一'モビニール社製 ·モビニール 752、固形 分濃度 47%) 40%  Styrene · Acrylic rosin aqueous solution (Nichigo 1 'made by Movinyl Corporation · Movinyl 752, solid concentration 47%) 40%
アルカリ処理ゼラチン 2%  Alkaline treated gelatin 2%
2, 4 ジクロロ一 6 ヒドロキシ一 S トリァジン'ナトリウム水溶液（固形分濃度 4%)  2, 4 Dichloro 1-6 Hydroxy 1 S Triazine 'Sodium aqueous solution (Solid content concentration 4%)
1%  1%
ジォクチル ·スルホ琥珀酸ナトリウム水溶液（固形分濃度 1 %) 15% ステアリン酸アミド ·エマルシヨン水溶液 (中京油脂製ノヽイミクロン L— 271、有効成分 濃度 25%) 12%  Dioctyl · sodium sulfosuccinate aqueous solution (solid concentration 1%) 15% stearamide · emulsion aqueous solution (Nokyo micron L-271, Chukyo Yushi Co., active ingredient concentration 25%) 12%
水 30%  30% water
t試料 125作製〕  t Sample 125 production)
上記試料 124の作製にぉ 、て、紙支持体 Dを紙支持体 Gに変更した以外は同様に して、試料 125を作製した。 The sample 124 was prepared in the same manner except that the paper support D was changed to the paper support G. Thus, a sample 125 was produced.
[0138] 〔試料 126作製〕 [Sample 126]
紙支持体 Dの表榭脂層側に、常法に従ってコロナ放電処理を施した後、下記のァ ンカ一層 bを乾燥膜厚 0.： mとなる条件で塗布した後、前記の中空粒子力 なる 断熱層 a塗布液を用いて、乾燥後の平均膜厚が 30 mとなるようにワイヤーバーで 塗布、乾燥して、更に前記のアクリル榭脂からなるトナー受容層 c塗布液を、乾燥後 の平均膜厚が 5 mとなるようにワイヤーバーで塗布、乾燥して試料 126を作製した  After the corona discharge treatment is performed on the surface resin layer side of the paper support D according to a conventional method, the following anchor layer b is applied under the condition that the dry film thickness is 0: m, and then the above hollow particle force is applied. Heat-insulating layer a Using a coating solution, coat with a wire bar so that the average film thickness after drying is 30 m, dry, and then dry the toner-receiving layer c consisting of the above acrylic resin after drying Sample 126 was prepared by coating with a wire bar and drying so that the average film thickness of the film became 5 m.
[0139] (アンカー層 b塗布液） [0139] (Anchor layer b coating solution)
アクリル榭脂水溶液 (二チゴー ·モビニール社製 ·モビニール 745、固形分濃度 38 %) 40%  Acrylic rosin aqueous solution (NichigoMolevinyl Ltd.Movinyl 745, solid concentration 38%) 40%
アルカリ処理ゼラチン 2%  Alkaline treated gelatin 2%
2, 4—ジクロロ一 6—ヒドロキシ一 S—トリァジン'ナトリウム水溶液（固形分濃度 4%)  2, 4-dichloro-6-hydroxy S-triazine sodium solution (solid content 4%)
1%  1%
ジォクチル ·スルホ琥珀酸ナトリウム水溶液（固形分濃度 1 %) 15% 水 32%  Dioctyl sodium sulfosuccinate aqueous solution (solid content 1%) 15% Water 32%
t試料 127作製〕  t Preparation 127)
紙支持体 Lの表榭脂層側に、常法に従ってコロナ放電処理を施した後、上記のァ ンカ一層 b塗布液を用いて、乾燥膜厚 1 μ mとなる条件で塗布した後、前記の中空粒 子力もなる断熱層 a塗布液を用いて、乾燥後の平均膜厚が 30 mとなる条件でワイ ヤーバーを用いて塗布、乾燥して、更に前記のアクリル榭脂からなるトナー受容層 c 塗布液を乾燥後の平均膜厚が 5 μ mとなる条件でワイヤーバーを用いて塗布、乾燥 して、試料 127を作製した。  After applying the corona discharge treatment to the surface resin layer side of the paper support L according to a conventional method, using the above-mentioned anchor layer b coating solution, after applying under the condition that the dry film thickness is 1 μm, Heat-insulating layer that also has a hollow particle power a Toner-receiving layer comprising the above acrylic resin, which is coated and dried using a coating solution under a condition that the average film thickness after drying is 30 m. c Sample 127 was prepared by coating and drying the coating solution using a wire bar under the condition that the average film thickness after drying was 5 μm.
[0140] 《電子写真用受像材料の評価》 [0140] <Evaluation of electrophotographic image-receiving material>
上記作製した電子写真用受像材料である試料 101〜127について、搬送速度と定 着器の温度を細力べ変更できるように改造したコ-カミノルタビジネステクノロジーズ 社製のプリンター magicolor2430DLを用いて、以下の評価を行った。なお、トナー は、 magicolor2430DL用トナーを用いた。 [0141] 〔光沢度の測定〕 For the samples 101 to 127, which are the electrophotographic image receiving materials prepared above, using the printer magicolor2430DL manufactured by Co-Caminorta Business Technologies Co., Ltd., modified so that the conveyance speed and the temperature of the fixing device can be changed finely. Was evaluated. In addition, the toner for magicolor2430DL was used. [0141] [Glossiness measurement]
改造した magicolor2430DLの定着条件を、加熱ローラーの定着温度 200°C、定 着速度 40mmZsecの条件で、マゼンタベタ画像を出力した後、 JIS Z 8741に従 つて、デジタル変角光沢度計 (スガ試験機製、 UGV— 5D)により、 20度光沢度を測 定し、光沢度を求めた。  After fixing the modified magicolor2430DL with a heating roller fixing temperature of 200 ° C and a fixing speed of 40 mmZsec, a magenta solid image was output, and a digital variable-angle glossiness meter (manufactured by Suga Test Instruments Co., Ltd.) , UGV-5D), the 20 degree glossiness was measured, and the glossiness was determined.
[0142] 〔ペーパーブリスタ耐性の評価〕  [0142] [Evaluation of paper blister resistance]
23°C、 55%RHの環境条件下で、改造した magicolor2430DLの定着条件を、加 熱ローラーの定着温度を 200°C、定着速度を線速度 50mmZsecの条件で、各電子 写真受像材料をトナー未転写のまま、ハガキサイズで 100枚通して、ペーパーブリス タの発生程度を目視観察し、下記の基準に従ってペーパーブリスタ耐性の評価を行 つた o  Under the conditions of 23 ° C and 55% RH, the modified magicolor2430DL fixing conditions are as follows: the fixing temperature of the heating roller is 200 ° C, the fixing speed is 50 mmZsec, and each electrophotographic image-receiving material is untoned. Pass through 100 postcards in the transferred size, visually observe the degree of occurrence of paper blisters, and evaluate paper blister resistance according to the following criteria: o
[0143] A:ブリスタが発生が認められない  [0143] A: No blistering is observed
B: 1〜2枚にブリスタの発生が認められる  B: Generation of blisters on one or two sheets
C : 3〜 10枚にブリスタは発生が認められる  C: Blister is observed on 3 to 10 sheets
D: 11枚以上にブリスタの発生が認められる  D: Blisters are observed on 11 or more sheets
ランクが A、 Bならば電子写真受像材料として有効と判断でき、 C、 Dの場合には高 性能な電子写真受像材料として使用することはできないと判定した。  If the rank is A or B, it can be judged that it is effective as an electrophotographic image receiving material, and if it is C or D, it is judged that it cannot be used as a high performance electrophotographic image receiving material.
[0144] 〔波打ち耐性の評価〕 [Evaluation of wave resistance]
28°C、 80%RHの環境条件下で、改造した magicolor2430DLの定着条件を、加 熱ローラーの定着温度を 190°C、定着速度を線速度 30mmZsecで片面プリントを 行い、 1分間放置後の波打ちの状態を目視観察し、下記の基準に従って波打耐性の 評価を行った。  Under the conditions of 28 ° C and 80% RH, the modified magicol2430DL was fixed on a single roller at a fixing temperature of a heating roller of 190 ° C and a fixing speed of 30mmZsec. The state of this was visually observed, and the resistance to undulation was evaluated according to the following criteria.
[0145] A:全く波打ちが生じないもの [0145] A: No waviness
B:波打ちが若干生じるもの  B: Some undulation
C：波打ちは生じるが許容できるもの  C: Rippled but acceptable
D:波打ちが目立ち、許容できないもの  D: Wavy is conspicuous and unacceptable
E :波打ちが著しく発生し、許容できないもの  E: Wavily generated and unacceptable
D、 Eの場合には高性能な電子写真受像材料として使用することはできない 〔通紙による加熱ローラーとの離型性の評価〕 In the case of D and E, it cannot be used as a high-performance electrophotographic image receiving material. [Evaluation of releasability from heating roller by passing paper]
23°C、 55%RHの環境条件下で、改造した magicolor2430DLの定着条件を、加 熱ローラーの定着温度を 220°C、定着速度を線速度 120mmZsecで、片面プリント を行い、ハガキサイズで連続 100枚の通紙により、加熱ローラーとの離型性を評価し た。加熱ローラーとの離型性が悪い場合には、ペーパー搬送に支障がでて、通紙が 出来なくなる。  Under the conditions of 23 ° C, 55% RH, the modified magicolor2430DL was fixed on a heating roller with a fixing temperature of 220 ° C, with a fixing speed of 120mmZsec. The releasability from the heating roller was evaluated by passing sheets. If the releasability from the heating roller is poor, paper conveyance will be hindered and paper passing will not be possible.
[0146] A：全て問題なく 100枚の通紙できた [0146] A: 100 sheets passed without any problem
B:通紙できた力 1〜5枚に離型性不良によるローラー痕が見られた  B: Rolling marks due to poor releasability were seen on 1-5 sheets
C :通紙できたが、 6枚以上に離型性不良によるローラー痕が見られた  C: Paper was passed, but roller marks due to poor releasability were observed on 6 sheets or more
D:離型性が劣り、 1〜5枚通紙できなかった  D: Inferior releasability, 1-5 sheets could not be passed
E :離型性が劣り、 6枚以上通紙できなかった  E: Inferior releasability, 6 or more sheets could not be passed
D、 Eの場合には高性能な電子写真受像材料として使用することはできな 、と判定 した。  In the case of D and E, it was judged that it could not be used as a high performance electrophotographic image receiving material.
[0147] 以上により得られた結果を、表 1に示す。  [0147] Table 1 shows the results obtained as described above.
[0148] [表 1] [0148] [Table 1]
6 325057 6 325057
29 29
Figure imgf000030_0001
表 1に記載の結果より明らかなように、本発明の電子写真受像材料は、比較例に対 し、形成した画像が高い光沢度を有し、かつ定着ローラーや定着ベルトとの離型性 に優れ、プリントの波打ちに問題なぐ更に高温定着でもペーパーブリスタ耐性に優 れることが分力ゝる。
Figure imgf000030_0001
As is apparent from the results shown in Table 1, the electrophotographic image-receiving material of the present invention has a high glossiness with respect to the comparative example, and is excellent in releasability from the fixing roller and fixing belt. It is excellent in that it is excellent in resistance to paper blisters even at high temperature fixing, which is not a problem with printing ripples.

Claims

請求の範囲 The scope of the claims
[1] 紙基体の両面に、溶融押し出しコーティングにより形成された熱可塑性榭脂からな る榭脂被覆層を有する紙支持体の少なくとも一方の面に、空隙を有する断熱層と、 該断熱層の上部に少なくとも 1層の熱可塑性榭脂を含有するトナー受容層を有する ことを特徴とする電子写真受像材料。  [1] A heat insulating layer having voids on at least one surface of a paper support having a resin coating layer made of thermoplastic resin formed by melt extrusion coating on both sides of a paper substrate, An electrophotographic image receiving material comprising a toner receiving layer containing at least one layer of thermoplastic resin on the top.
[2] 前記トナー受容層が、ワックスを含有することを特徴とする請求の範囲第 1項に記載 の電子写真受像材料。  2. The electrophotographic image-receiving material according to claim 1, wherein the toner-receiving layer contains a wax.
[3] 前記榭脂被覆層を構成する熱可塑性榭脂が、ポリエチレン、ポリプロピレン、ポリメ チルペンテン及びポリエステルカゝら選ばれる少なくとも 1種であることを特徴とする請 求の範囲第 1項または第 2項に記載の電子写真受像材料。  [3] The scope of claim 1 or 2, wherein the thermoplastic resin constituting the resin coating layer is at least one selected from polyethylene, polypropylene, polymethylpentene, and polyester cartridge. The electrophotographic image-receiving material according to Item.
[4] 前記榭脂被覆層を構成する熱可塑性榭脂がポリエチレン榭脂であって、該ポリエ チレン榭脂が高密度ポリエチレンを 50質量％以上含有することを特徴とする請求の 範囲第 1項または第 2項に記載の電子写真受像材料。 [4] The thermoplastic resin constituting the resin coating layer is a polyethylene resin, and the polyethylene resin contains 50% by mass or more of high-density polyethylene. Or the electrophotographic image-receiving material according to item 2.
[5] 前記紙支持体のトナー受容層を有する面とは反対側の面に設けた榭脂被覆層 A[5] A resin coating layer A provided on the surface of the paper support opposite to the surface having the toner receiving layer
1S 高密度ポリエチレンを 50質量％以上含有し、前記紙支持体のトナー受容層を有 する面に設けた榭脂被覆層 B力 低密度ポリエチレンを 80質量％以上含有し、かつ 榭脂被覆層 Bの塗設量が 30gZm2以上であることを特徴とする請求の範囲第 1項乃 至第 4項の 1、ずれか 1項に記載の電子写真受像材料。 1S High-density polyethylene containing 50% by mass or more and a resin coating layer B force provided on the surface of the paper support having the toner-receiving layer B force Low-density polyethylene containing 80% by mass or more and the resin coating layer B The electrophotographic image-receiving material according to any one of claims 1 to 4, wherein the coating amount is at least 30 gZm 2 .
[6] 前記榭脂被覆層は、軟化温度が 120°C以上の熱可塑性榭脂を 50質量％以上含 有していることを特徴とする請求の範囲第 1項乃至第 5項のいずれか 1項に記載の電 子写真受像材料。 [6] The resin coating layer according to any one of claims 1 to 5, wherein the resin coating layer contains 50% by mass or more of thermoplastic resin having a softening temperature of 120 ° C or higher. The electrophotographic image-receiving material described in item 1.
[7] 前記空隙を有する断熱層が、中空粒子と親水性バインダーとを含有することを特徴 とする請求の範囲第 1項乃至第 6項のいずれか 1項に記載の電子写真受像材料。  [7] The electrophotographic image receiving material according to any one of [1] to [6], wherein the heat insulating layer having voids contains hollow particles and a hydrophilic binder.
[8] 前記親水性バインダーが、可逆的にゾルゲル変換するバインダーであることを特徴 とする請求の範囲第 7項に記載の電子写真受像材料。  8. The electrophotographic image-receiving material according to claim 7, wherein the hydrophilic binder is a binder that reversibly sol-gel converts.
[9] 前記可逆的にゾルゲル変換するバインダーが、ゼラチンであることを特徴とする請 求の範囲第 8項に記載の電子写真受像材料。  [9] The electrophotographic image-receiving material according to item 8, wherein the binder that reversibly sol-gel converts is gelatin.
PCT/JP2006/325057 2006-01-18 2006-12-15 Electrophotographic image-receiving material WO2007083467A1 (en)

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