JP2011237557A - Image forming method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image forming method for obtaining high image quality and a printed matter in which clear images are presented without sealing air, and to provide an image forming method for generating a printed matter with high quality while saving energy and the printed matter in which clear images are presented without sealing air.SOLUTION: In the image forming method, toner images formed by toner particles are supported on an image supporting base material, on which a toner holding material layer is subsequently laminated and a holding process is performed, making the toner holding material layer hold the toner images, and thereby a printed matter is formed. In the holding process a pressure is applied to a laminated body, in which the toner holding material layer is laminated on the image supporting base material supporting the toner images, in order from its ends.

Description

  The present invention relates to an image forming method for forming a printed material in which a toner holding material layer holding a toner image is laminated on an image supporting substrate.

  In recent years, energy saving has been studied in various fields from the viewpoint of preventing global warming, and even in an electrophotographic image forming method, fixing at a low temperature (for example, refer to Patent Document 1) or without using heat. For example, a method for reducing the energy required for fixing by fixing only by pressing force (for example, see Patent Document 2), a method for reusing an image supporting substrate (for example, see Patent Document 3), and the like have been proposed. Yes.

  However, these methods have a problem that the toner particles cannot be reused because the toner particles are irreversibly deformed.

  In order to improve such a problem, a method has been proposed in which a concave portion is provided on the surface of the image support substrate, and toner particles are electrostatically adhered and fixed therein (for example, see Patent Document 4). Yes.

However, depending on the method using the image supporting substrate provided with the recesses, the toner particles are inevitably detached, and the toner particles are contaminated, and the image is formed between the portion where the image is formed and the other portions. Therefore, there is a problem that a high level of image quality cannot be obtained.
As described above, conventionally, there has been no image forming method capable of obtaining high image quality in the printed matter while achieving energy saving by reusing the image forming material.

  On the other hand, Japanese Patent Application No. 2008-319194 discloses an image forming method capable of obtaining a printed product with high image quality while achieving energy saving by reusing the image forming material. In the printed matter obtained by the above, air is sealed together with the toner image in the printed matter, and the obtained image may become unclear.

Japanese Patent No. 4144134 JP-A-6-242627 JP 2003-5435 A Japanese Patent No. 4085505

The present invention has been made on the basis of the circumstances as described above, and the object thereof is to obtain a high image quality, and to obtain a printed matter in which a clear image is presented without enclosing air. An object is to provide an image forming method.
Another object of the present invention is to obtain a high-quality image on a printed matter that is formed while achieving energy savings, and to obtain a printed matter on which a clear image is presented without enclosing air. It is to provide a forming method.

In the image forming method of the present invention, after a toner image formed of toner particles is carried on an image supporting substrate, a toner holding material layer is laminated on the image supporting substrate and a holding treatment is performed, and then the toner is formed. An image forming method for forming a printed matter by holding a toner image on a holding material layer,
The holding process is characterized in that pressure is sequentially applied from the end to a laminated body in which a toner holding material layer is laminated on an image supporting substrate on which a toner image is carried.

In the image forming method of the present invention, a toner image formed of toner particles is carried on a toner holding material layer, and then an image supporting base material is laminated on the toner holding material layer and a holding treatment is performed. An image forming method for forming a printed matter by holding a toner image on the toner holding material layer,
The holding process is characterized in that pressure is sequentially applied from the end to a laminated body in which an image supporting base material is laminated on a toner holding material layer carrying a toner image.

In addition, the image forming method of the present invention comprises carrying a toner image formed of toner particles on a toner holding material layer laminated on an image supporting substrate, and then forming a surface protective layer on the toner holding material layer. An image forming method of forming a printed matter by laminating and holding a toner image on the toner holding material layer by laminating
The holding treatment is characterized in that pressure is sequentially applied from the end to a laminate in which a surface protective layer is laminated on a toner holding material layer carrying a toner image.

  In the image forming method of the present invention, it is preferable that the holding process is to pass through a nip portion formed by pressing two rotating bodies against each other.

In the above image forming method, the nip pressure applied at the nip portion is preferably 1.0 × 10 ^{3 to} 1.0 × 10 ⁸ Pa.

  In the above image forming method, it is preferable that the pressing time for pressing at the nip portion is 0.001 to 30 seconds.

  The image forming method of the present invention is characterized in that a printed matter is obtained using toner particles separated from the printed matter obtained by the above-described image forming method.

  The image forming method of the present invention is characterized in that a printed matter is obtained using an image supporting substrate separated from the printed matter obtained by the above-described image forming method.

In the image forming method of the present invention, after a toner image formed of toner particles is carried on an image supporting substrate, a toner holding material layer is laminated on the image supporting substrate, and pressure is sequentially applied from the end. An image forming method for forming a printed matter by applying a holding treatment to hold the toner image on the toner holding material layer,
At least one of the toner particles constituting the toner image, the toner holding material layer, and the image supporting base material is separated from the printed matter obtained by the image forming method.

In the image forming method of the present invention, after a toner image formed of toner particles is carried on a toner holding material layer, an image supporting substrate is laminated on the toner holding material layer and pressure is sequentially applied from the end. An image forming method for forming a printed matter by applying a holding treatment to hold a toner image on the toner holding material layer,
At least one of the toner particles constituting the toner image, the toner holding material layer, and the image supporting base material is separated from the printed matter obtained by the image forming method.

In addition, the image forming method of the present invention comprises carrying a toner image formed of toner particles on a toner holding material layer laminated on an image supporting substrate, and then forming a surface protective layer on the toner holding material layer. An image forming method of forming a printed matter by laminating and holding a toner image on the toner holding material layer by applying a holding process of sequentially applying pressure from the end,
At least one of the toner particles constituting the toner image, the toner holding material layer, and the image supporting base material is separated from the printed matter obtained by the image forming method.

  According to the image forming method of the present invention, basically, the toner image can be fixed to the image supporting substrate without applying heat, so that energy saving can be achieved. Since it is held by the holding material layer, the surface thereof is in a highly uniform state, there is no difference in height level between the portion where the image is formed and the other portion, and thus it has high image quality. In addition, since a specific holding process in which pressure is sequentially applied from the end to the laminated body in which the toner image is sandwiched is performed, the toner image is held in a state where an air discharge port is always secured. As a result, it is possible to obtain a printed matter in which a clear image is presented without air being enclosed.

  Further, according to the method of reusing the toner particles and / or the toner holding material layer and / or the image supporting substrate separated from the printed matter obtained by the image forming method of the present invention, a great energy saving is achieved as a whole. The

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram for explaining an image forming method according to a first embodiment of the present invention, in which (a) is a state in which a toner holding material layer is laminated on an image supporting substrate on which a toner image is carried. FIG. 4B is a diagram illustrating a state in which a toner image is fixed on the image support base. FIG. 4 is an enlarged schematic diagram illustrating a state in which a toner holding material layer is laminated on an image supporting substrate on which a toner image is carried. FIG. 6 is a schematic diagram for explaining an image forming method according to a second embodiment of the present invention, in which (a) is a state in which an image supporting base material is laminated on a toner holding material layer on which a toner image is carried. FIG. 4B is a diagram illustrating a state in which a toner image is fixed on the image support base. FIG. 6 is a schematic diagram for explaining an image forming method according to a third embodiment of the present invention, in which (a) shows a state in which a surface protective layer is laminated on a toner holding material layer carrying a toner image. FIG. 4B is a diagram illustrating a state in which a toner image is fixed on the image supporting substrate.

  Hereinafter, the image forming method of the present invention will be described in detail.

<First Embodiment>
In the image forming method according to the first embodiment of the present invention, a toner image formed of toner particles is carried on an image supporting substrate, and then a toner holding material layer is laminated on the image supporting substrate. And an image forming method for forming a printed matter by holding the toner image on the toner holding material layer and holding the toner on the image supporting substrate on which the toner image is carried. It is characterized in that pressure is sequentially applied from the end to the laminated body in which the material layers are laminated.
Here, the state in which the toner holding material layer is laminated on the image supporting base material on which the toner image is carried is, as shown in FIG. 2, the toner particles constituting the toner image on the image supporting base material, A state in which the toner holding material layer is in contact, the toner particles are not embedded in the toner holding material layer, and the image supporting substrate and the toner holding material layer are not in contact in the vicinity of the toner particles.

  In the image forming method of the present invention, specifically, as shown in FIG. 1, a toner image T electrostatically formed with toner particles on a photoreceptor (not shown) is converted into an image supporting substrate 11. Then, the image fixing sheet 12 formed by laminating the toner holding material layer 15 on one surface of the surface protective layer 13, for example, on the image supporting base material 11 on which the toner image T is carried, is transferred to the image supporting base. The toner image T on the material 11 and the toner holding material layer 15 are laminated so that they are in contact with each other, or after the lamination, a holding process is performed to embed and hold the toner image T in the toner holding material layer 15. As a result, the toner image T is fixed to the image supporting substrate 11, and a printed matter P on which the image related to the toner image T is presented is obtained.

In this image forming method, the holding process can be performed, for example, by allowing the fixing device 20 to pass through the nip portion N formed by the two rotating bodies 21 and 22 being pressed against each other.
The specific configuration of the fixing device 20 is not particularly limited as long as the two rotators 21 and 22 are pressed against each other to form the nip portion N. For example, the two rotators 21 and 22 are used as the fixing device 20. , Rigid rollers and elastic rollers, rigid rollers and belt-like bodies, elastic rollers and elastic rollers, elastic rollers and belt-like bodies, and combinations of belt-like bodies and belt-like bodies.
In this method, it is sufficient that at least one nip portion is passed, and two or more nip portions may be sequentially passed.

In such a holding process using the fixing device 20, the nip pressure applied at the nip portion N varies depending on the type of toner holding material forming the toner holding material layer 15, for example, 1.0 × 10 ³ to 1. The size is preferably 0.0 × 10 ⁸ Pa, more preferably 1.0 × 10 ^{4 to} 1.0 × 10 ⁷ Pa.
By applying the nip pressure in the above range, the toner image T can be reliably held on the toner holding material layer 15 and appropriate adhesion between the image supporting substrate 11 and the toner holding material layer 15 can be obtained. In addition, the occurrence of damage to the toner particles and the image supporting substrate 11 is suppressed, and the image forming materials such as the toner particles, the toner holding material layer and the image supporting substrate are separated and reused as will be described later. These image forming materials can be reliably separated and reused.
On the other hand, if the nip pressure is excessively small, the toner image T may not be sufficiently embedded in the toner holding material layer 15 and may not be satisfactorily held, resulting in a distorted image, or the toner image T may be held by the toner. Even if it is sufficiently embedded and held in the material layer 15, the image-supporting substrate 11 and the toner-holding material layer 15 are not sufficiently adhered to each other. 11 and the toner holding material layer 15 may cause image collapse due to peeling.
If the nip pressure is excessively large, the toner holding material layer 15 may be crushed and the toner image T may be disturbed, and an intended image may not be obtained. Further, the toner holding material layer 15 may be crushed. Even if the toner holding material layer 15 and the image supporting substrate 11 are not sufficiently adhered, the image forming material such as the toner particles, the toner holding material layer and the image supporting substrate is separated. When reusing, the toner holding material layer 15 and the image supporting base material 11 cannot be peeled off, or the toner holding material layer 15 is broken or the image supporting base material 11 is broken, resulting in a toner holding material. Layers and / or image support substrates may not be reusable.

In such a holding process using the fixing device 20, the pressing time for pressing at the nip portion N varies depending on the type of toner holding material forming the toner holding material layer 15 and the magnitude of the nip pressure. For example, 0.001 to 30 seconds is preferable, and 0.001 to 5 seconds is particularly preferable.
Here, the pressing treatment time is a time represented by d / v, where d (mm) is the length in the traveling direction of the laminate of the nip portion N and v (mm / sec) is the linear velocity. .
When the pressing process time is excessively short, the toner image T may not be sufficiently embedded in the toner holding material layer 15 and may not be satisfactorily held, resulting in a disordered image, or the toner image T may be a toner holding material. Even if the image support substrate 11 and the toner holding material layer 15 are not sufficiently adhered even if they are sufficiently buried and held in the layer 15, the printed matter obtained by the image support substrate 11 with a little external force is obtained. There is a possibility that image collapse occurs due to peeling between the toner holding material layer 15 and toner.
On the other hand, when the pressing time is excessively long, the toner holding material layer 15 may be crushed and the toner image T may be disturbed, and an intended image may not be obtained. Also, the toner holding material layer 15 may be crushed. Even if the toner holding material layer 15 and the image supporting substrate 11 are not sufficiently bonded, the image forming material such as the toner particles, the toner holding material layer and the image supporting substrate is separated. When the toner holding material layer 15 and the image supporting base material 11 cannot be peeled off, or the toner holding material layer 15 is broken or the image supporting base material 11 is broken, There is a possibility that the material layer and / or the image supporting substrate cannot be reused.

  In such a holding process using the fixing device 20, heating is not required, but heat treatment may be performed at a low temperature, for example, about 60 to 80 ° C. in order to obtain a high-quality printed matter.

In the image forming method of the present invention, the particle shape degree of the toner particles used for forming the toner image T is A, and the particle shape degree of the toner particles constituting the toner image T held on the toner holding material layer is B. It is preferable that the following relational expression (I) is satisfied.
Relational expression (I): 1.0 ≧ B / A ≧ 0.9
Here, the particle shape degree of the toner particles is expressed by (minimum diameter of the projected image / maximum diameter of the projected image).
When (B / A) indicating the degree of change in the particle shape degree of the toner particles before and after being held by the toner holding material layer 15 is in the range of the above relational expression (I), it is possible to use a small external force, that is, a small amount of energy. A printed product with high image quality can be formed. On the other hand, when (B / A) indicating the degree of change in particle shape is less than 0.9, a large amount of energy is required to obtain the printed matter P, which is not preferable because the environmental load is large. .

  Specifically, the particle shape degree A of the toner particles used for forming the toner image T is determined by peeling off the toner image T electrostatically formed on the photosensitive member, and then scanning electron microscope (SEM) “JSM”. -7401F "(manufactured by JEOL Ltd.), and an image with a magnification of 2,000 times is taken into a" Luzex image analyzer "(manufactured by Nireco). The diameter and minimum diameter are measured, the particle shape obtained by dividing the minimum diameter by the maximum diameter is obtained, and the average value of the particle shape of 100 toner particles is calculated.

  Further, the particle shape degree B of the toner particles after being held by the toner holding material layer 15 is specifically determined by using a transmission electron microscope (TEM) of a cross section of the printed matter P obtained by this image forming method. Observed with “JEM-1400” (manufactured by JEOL Ltd.), an image with a magnification of 2,000 times is taken into a “Luzex image analyzer” (manufactured by Nireco). Is obtained by measuring the maximum diameter and the minimum diameter of the toner, determining the particle shape by dividing the minimum diameter by the maximum diameter, and calculating the average value of the particle shape for 100 toner particles. .

  Specifically, the particle shape degree A used for forming the toner image T is preferably 0.40 to 1.00, and more preferably 0.60 to 1.00. Further, the particle shape degree B of the toner particles after being held on the toner holding material layer 15 is preferably 0.40 to 1.00, more preferably 0.60 to 1.00. is there.

The relational expression (I) can be achieved, for example, by using toner particles having a 10% deformation strength of 1 to 100 MPa (hereinafter also referred to as “hard toner particles”).
This 10% deformation strength is a value measured in a compression test mode using a micro compression tester “MCT-W201” (manufactured by Shimadzu Corporation).

In the image forming method of the present invention, the toner particles are not limited to using hard toner particles, but have a recovery rate of 70% or more and have elastic and / or shape memory properties (hereinafter referred to as “elastic toner particles”). May also be used.
By using elastic toner particles having such a restoration rate, even when the toner particles are deformed and held in the toner holding material layer 15, it is necessary to separate from the toner holding material layer 15 as described later. By performing the restoration process accordingly, reusable toner particles that exhibit the same behavior as the initial toner particles can be obtained.
The restoration rate of the elastic toner particles is a value measured in a load / unload test mode using a micro compression tester “DUH-W201S” (manufactured by Shimadzu Corporation).

  According to the image forming method as described above, basically, the toner image T can be fixed to the image supporting substrate 11 without applying heat, so that energy saving can be achieved. Since the image T is held by the toner holding material layer 15, the surface thereof is in a highly uniform state, and there is no difference in height level between the portion where the image is formed and the other portion. In addition, a specific holding process is performed in which pressure is applied sequentially from the end to the laminate in which the toner image T is sandwiched between the image support base material 11 and the toner holding material layer 15. Thus, the toner image T is held in a state where the air discharge port is always secured, and as a result, it is possible to obtain a printed matter P in which a clear image is presented without enclosing air.

[Printed matter]
As shown in FIG. 1B, the printed material P obtained by the image forming method as described above is laminated with the toner holding material layer 15 on the image supporting base material 11, and the toner holding material layer 15 A toner image T formed by toner particles is held, and a surface protective layer 13 may be provided on the toner holding material layer 15 as necessary.

(Image support substrate)
As the image supporting substrate 11 constituting the printed matter P, an appropriate one can be used. For example, coated paper such as plain paper, fine paper, art paper or coated paper from thin paper to thick paper, Examples include commercially available Japanese paper, postcard paper, polypropylene synthetic paper, polyethylene terephthalate (PET) film, polyethylene naphthalate (PEN) film, polyimide film, and cloth.
Among these, those having a high strength, whose performance is not impaired even if the reuse through the separation process described later is repeated many times, for example, 10 times or more, are particularly preferable, and such reuse can be repeated many times. Preferred examples of the image supporting substrate 11 include plain plain paper (thick paper), art paper, coated paper, polyethylene terephthalate (PET) film, polyethylene naphthalate (PEN) film, and polyimide film.

[Toner retention material layer]
In the present invention, the toner holding material layer 15 is preferably made of a toner holding material that does not have fluidity in a state where no external force is applied, and that develops a fluid state when the external force is applied. . Specifically, for example, it can be made of a toner holding material having a thixotropic property that is in a gel state in a normal state and changes into a sol state by applying an external force.
In particular, the toner holding material has fluidity (hereinafter, also referred to as “specific fluidity”) such that when the toner particles are buried by an external force, the degree of change in the particle shape is suppressed to a small level. It is preferable.
The specific fluidity specifically refers to a material having a penetration of 30 or more measured according to JIS K2207 in a state where an external force for embedding toner particles is applied. As the holding material, the higher the penetration, the better.
A toner image T formed by electrostatically adhering each toner particle on the photoreceptor is maintained in such a state that the electrostatic charge in each toner particle is maintained by using the material having such specific fluidity. In the toner holding material layer 15.

  Further, as the toner holding material for forming the toner holding material layer 15, a material that is incompatible with a resin constituting the toner particles (hereinafter also referred to as “toner resin”) can be appropriately selected. Further, a material having high affinity with toner particles is preferable.

  As the toner holding material for forming the toner holding material layer 15, in particular, a toner holding material layer used for another image formation is formed using a toner holding material obtained through a separation process described later as an image forming material. A material that can be reused as a material is preferable.

Examples of the toner holding material that forms the toner holding material layer 15 include silicone-based, acrylic-based, vinyl-based, urethane-based resins, high-molecular compounds such as elastomer or rubber, and gels or sols of these with organic solvents or oils, An aqueous emulsion of the polymer compound, a gel or sol of the polymer compound or a water-soluble polymer, and an aqueous solvent can be used.
Specifically, the silicone resins include dimethylsiloxane, diphenylsiloxane, methylvinylsiloxane, methylphenylsiloxane, fluorosiloxane, trifluorosiloxane, trifluoropropylsiloxane, chloromethylsiloxane, cyanoethylsiloxane, polyether siloxane, fluoro Examples thereof include polyether siloxane and aminosiloxane.
Examples of acrylic resins include 2-ethylhexyl acrylate and n-butyl acrylate, methyl acrylate, ethyl acrylate, methyl methacrylate, acrylic acid, methacrylic acid, itaconic acid, acrylamide derivatives, hydroxyethyl acrylate, and glycidyl acrylate. Examples include polymers.
Examples of vinyl resins include polyvinyl acetate, ethylene-vinyl acetate copolymer, acrylic-vinyl acetate copolymer, polyvinyl acetal, polyvinyl butyral, phenol-vinyl butyral copolymer, polyvinyl pyrrolidone, and polyvinyl chloride. Is mentioned.
Examples of urethane resins include polyurethane prepolymers obtained by reacting polyols and polyisocyanates. Examples of polyols include 1,2-polybutadiene polyol, 1,4-polybutadiene polyol, and poly (pentadiene / butadiene) polyol. , Poly (butadiene / styrene) polyol, poly (butadiene / acrylonitrile) polyol, etc., and polyisocyanates include diphenylmethane diisocyanate, tolylene diisocyanate, naphthalene diisocyanate, polymethylene polyphenyl isocyanate, xylylene diisocyanate, lysine diisocyanate, hexamethylene. Diisocyanate, isophorone diisocyanate, methylene bis (cyclohexyl isocyanate), etc.
Further, as water-soluble polymers, natural polymer polysaccharides such as xanthan gum, carrageenan, pullulan, furseleran, curdlan, gelatin, collagen, etc .; sodium alginate, calcium alginate natural low molecular polysaccharide; polyacrylic acid; sodium polyacrylate Polyvinyl alcohol and the like.
Examples of the aqueous solvent include methyl alcohol, ethyl alcohol, ethylene glycol, propylene glycol, polyethylene glycol, and glycerin.

  The thickness of the toner holding material layer 15 is set in relation to the thickness of the toner image T to be held, for example, 1 to 500 μm.

[Toner particles]
The toner particles forming the toner image T relating to the printed matter P contain at least a resin, for example, and may further contain a colorant, a charge control agent, a magnetic powder, a release agent and the like as desired. . Such an aggregate of toner particles is hereinafter referred to as toner.
Hereinafter, unused toner particles will be described.

[Method for producing toner particles]
A method for producing such toner particles is not particularly limited, and a pulverization method, an emulsion dispersion method, a suspension polymerization method, a dispersion polymerization method, an emulsion polymerization method, an emulsion polymerization aggregation method, and other known methods. And so on.

[Toner resin]
When the toner particles are produced by a pulverization method, an emulsification dispersion method, etc., as the toner resin, styrene resin, (meth) acrylic resin, styrene- (meth) acrylic copolymer resin, olefin resin, etc. Various known resins such as vinyl resin, polyester resin, polyamide resin, polycarbonate resin, polyether, polyvinyl acetate resin, polysulfone, epoxy resin, polyurethane resin, and urea resin can be used. These can be used alone or in combination of two or more.

  On the other hand, when the toner particles are produced by a suspension polymerization method, a dispersion polymerization method, an emulsion polymerization method, an emulsion polymerization aggregation method, etc., as a polymerizable monomer for obtaining a toner resin, for example, styrene, o-methyl Styrene, m-methylstyrene, p-methylstyrene, α-methylstyrene, p-chlorostyrene, 3,4-dichlorostyrene, p-phenylstyrene, p-ethylstyrene, 2,4-dimethylstyrene, p-tert- Styrene or styrene derivatives such as butyl styrene, pn-hexyl styrene, pn-octyl styrene, pn-nonyl styrene, pn-decyl styrene, pn-dodecyl styrene; methyl methacrylate, methacrylic acid Ethyl, n-butyl methacrylate, isopropyl methacrylate, isobutyl methacrylate, methacrylate Methacrylic acid ester derivatives such as t-butyl acid, n-octyl methacrylate, 2-ethylhexyl methacrylate, stearyl methacrylate, lauryl methacrylate, phenyl methacrylate, diethylaminoethyl methacrylate, dimethylaminoethyl methacrylate; methyl acrylate, Acrylics such as ethyl acrylate, isopropyl acrylate, n-butyl acrylate, t-butyl acrylate, isobutyl acrylate, n-octyl acrylate, 2-ethylhexyl acrylate, stearyl acrylate, lauryl acrylate, phenyl acrylate, etc. Acid ester derivatives; olefins such as ethylene, propylene, and isobutylene; vinyl halides such as vinyl chloride, vinylidene chloride, vinyl bromide, vinyl fluoride, and vinylidene fluoride; Vinyl esters such as vinyl pionate, vinyl acetate and vinyl benzoate; vinyl ethers such as vinyl methyl ether and vinyl ethyl ether; vinyl ketones such as vinyl methyl ketone, vinyl ethyl ketone and vinyl hexyl ketone; N-vinyl carbazole, N -N-vinyl compounds such as vinyl indole and N-vinyl pyrrolidone; vinyl compounds such as vinyl naphthalene and vinyl pyridine; vinyl monomers such as acrylic acid or methacrylic acid derivatives such as acrylonitrile, methacrylonitrile and acrylamide Can be mentioned. These vinyl monomers can be used alone or in combination of two or more.

Moreover, it is preferable to use combining what has an ionic dissociation group as a polymerizable monomer. The polymerizable monomer having an ionic dissociation group has, for example, a substituent such as a carboxyl group, a sulfonic acid group, and a phosphoric acid group as a constituent group, and specifically includes acrylic acid, methacrylic acid, maleic acid. Acid, itaconic acid, cinnamic acid, fumaric acid, maleic acid monoalkyl ester, itaconic acid monoalkyl ester, styrene sulfonic acid, allyl sulfosuccinic acid, 2-acrylamido-2-methylpropane sulfonic acid, acid phosphooxyethyl methacrylate And 3-chloro-2-acid phosphooxypropyl methacrylate.
Furthermore, as a polymerizable monomer, divinylbenzene, ethylene glycol dimethacrylate, ethylene glycol diacrylate, diethylene glycol dimethacrylate, diethylene glycol diacrylate, triethylene glycol dimethacrylate, triethylene glycol diacrylate, neopentyl glycol dimethacrylate, neopentyl A resin having a crosslinked structure can also be obtained using polyfunctional vinyls such as glycol diacrylate.

  Elastic toner particles can be obtained by using a material exhibiting at least elasticity and / or shape memory as a toner resin.

Examples of the toner resin exhibiting shape memory properties include polymer materials such as elastomers having shape memory properties.
Examples of the elastomer having shape memory include a cross-linked shape memory elastomer that is physically or chemically cross-linked, and a network-type shape memory elastomer in which a network polymer and a phase change polymer are mixed.
Specific examples of elastomers having shape memory include monomers such as norbornene, styrene, butadiene, isoprene, methyl methacrylate, butyl acrylate, ethylene, propylene, acrylic acid, isofluorone diisocyanate, oxypropylene glycol, and peroxyketals. , Hindered phenol, benzoyl peroxide, 1,4-butanediol, ethylene glycol and other cross-linking agents, polynobornene, polyurethane, polyisoprene, polyethylene, styrene -Cross-linked shape memory polymer such as butadiene copolymer, network polymer such as epoxy resin, phenol resin, acrylic resin, polyester, melanin resin and polycaprolactone, polyvinyl chloride, Polystyrene, polybutylene succinate, polyethylene terephthalate, polybutylene terephthalate, etc. polyphenylenesulfide network shape memory polymer mixed phase transition polymers such as de the like.

In addition, examples of the toner resin exhibiting elasticity include materials exhibiting elasticity such as an elastomer having rubber elasticity.
Examples of the elastomer having rubber elasticity include rubbers such as natural rubber and synthetic rubber, and thermoplastic elastomers having an alloy structure of a resin and a rubber that flows at a high temperature but prevents plastic deformation at a normal temperature and gives a reinforcing effect to the rubber. Is mentioned.
Specific examples of the elastomer having rubber elasticity include, for example, natural rubber mainly composed of cis-polyisoprene, natural gutta percha mainly composed of trans-polyisoprene, acrylic acid, butyl acrylate, 1,3-butadiene, 2 -Chloro-1,3-butadiene, acrylonitrile, isoprene, chloroprene, styrene, α-methylstyrene, p-chlorostyrene, isobutylene, hexamethylsiloxane, tetrafluoroethylene, isocyanate, oxypropylene glycol, epihydrin, ethylene, propylene, etc. Acrylic rubber with addition polymerization and copolymerization of monomers; acrylonitrile butadiene rubber, isoprene rubber, urethane rubber, ethylene propylene rubber, epichlorohydrin rubber, chloroprene rubber, silicone rubber, rubber Synthetic rubber such as lenbutadiene rubber, butadiene rubber, fluorine rubber, polyisobutylene rubber, methacrylic acid-butadiene copolymer, acrylic acid-butadiene copolymer, methyl methacrylate-butadiene copolymer, styrene-butadiene copolymer , Styrene-isoprene copolymer, styrene-ethylenebutylene copolymer, styrene-ethylenepropylene copolymer, styrene-isobutylene copolymer, methyl vinyl ketone-butadiene copolymer, olefin-based thermoplastic elastomer (TPO, TPV) , Vinyl chloride thermoplastic elastomer (TPVC), amide thermoplastic elastomer, ester thermoplastic elastomer, urethane thermoplastic elastomer, and the like.

[Colorant]
When the toner particles are configured to contain a colorant, organic or inorganic pigments of various colors as exemplified below can be used as the colorant.
That is, examples of black pigments include carbon black, copper oxide, manganese dioxide, aniline black, activated carbon, nonmagnetic ferrite, magnetic ferrite, and magnetite.
Yellow pigments include yellow lead, zinc yellow, cadmium yellow, yellow iron oxide, mineral fast yellow, nickel titanium yellow, navel yellow, naphthol yellow S, Hansa Yellow G, Hansa Yellow 10G, Benzidine Yellow G, Benzidine Yellow GR, Examples include quinoline yellow lake, permanent yellow NCG, and tartrazine lake.
Examples of the orange pigment include red chrome yellow, molybdenum orange, permanent orange GTR, pyrazolone orange, vulcan orange, indanthrene brilliant orange RK, benzidine orange G, and indanthrene brilliant orange GK.
Red pigments include quinacridone, bengara, cadmium red, red lead, mercury sulfide, cadmium, permanent red 4R, risol red, pyrazolone red, watching red, calcium salt, lake red C, lake red D, brilliant carmine 6B, eosin Rake, rhodamine lake B, alizarin lake, brilliant carmine 3B, etc. are mentioned.
Examples of purple pigments include manganese purple, fast violet B, and methyl violet lake.
Examples of blue pigments include bitumen, cobalt blue, alkali blue lake, Victoria blue lake, metal phthalocyanine blue, metal-free phthalocyanine blue, phthalocyanine blue partially chlorinated, first sky blue, and induslen blue BC.
Examples of the green pigment include chrome green, chromium oxide, pigment green B, micalite green lake, final yellow green G, and the like.
Examples of white pigments include zinc white, titanium oxide, antimony white, and zinc sulfide.
Examples of extender pigments include barite powder, barium carbonate, clay, silica, white carbon, talc, and alumina white.
These pigments can be used alone or in combination of two or more.

  The addition amount of the colorant is preferably 0.5 to 20 parts by mass, more preferably 2 to 10 parts by mass with respect to 100 parts by mass of the toner resin.

[Magnetic powder]
When the toner particles are configured to contain magnetic powder, for example, magnetite, γ-hematite, or various ferrites can be used as the magnetic powder.
The addition amount of the magnetic powder is preferably 10 to 500 parts by mass, more preferably 20 to 200 parts by mass with respect to 100 parts by mass of the toner resin.

[Charge control agent]
Further, in the case where the toner particles are configured to contain a charge control agent, the charge control agent is not particularly limited as long as it is a substance that can give positive or negative charge by frictional charging, and there are various known ones. Can be used. Specifically, as the positive charge control agent, for example, a nigrosine dye such as “Nigrosine Base EX” (manufactured by Orient Chemical Industries), “quaternary ammonium salt P-51” (manufactured by Orient Chemical Industries), “ Quaternary ammonium salts such as “Copy Charge PX VP435” (manufactured by Hoechst Japan), alkoxylated amines, alkylamides, molybdate chelate pigments, and imidazole compounds such as “PLZ1001” (manufactured by Shikoku Kasei Kogyo) Examples of the negative charge control agent include “Bontron S-22” (manufactured by Orient Chemical Industries), “Bontron S-34” (manufactured by Orient Chemical Industries), and “Bontron E-81” (Orient Chemical Industries). Manufactured by Co., Ltd.), "Bontron E-84" (manufactured by Orient Chemical Industry Co., Ltd.), "Spiron Black TRH" Metal complexes such as (Hodogaya Chemical Industries, Ltd.), thioindigo pigments, quaternary ammonium salts such as “Copy Charge NX VP434” (Hoechst Japan), “Bontron E-89” (Orient Chemical Industries) And boron compounds such as “LR147” (manufactured by Nippon Carlit), fluorine compounds such as magnesium fluoride and carbon fluoride, and the like. In addition to the metal complexes used as negative charge control agents, oxycarboxylic acid metal complexes, dicarboxylic acid metal complexes, amino acid metal complexes, diketone metal complexes, diamine metal complexes, azo group-containing benzene-benzene derivatives Those having various structures such as a skeletal metal body and an azo group-containing benzene-naphthalene derivative skeleton metal complex can be used.
As described above, the toner particles are configured to contain the charge control agent, whereby the chargeability of the toner is improved.

  The addition amount of the charge control agent is preferably 0.01 to 30 parts by mass, more preferably 0.1 to 10 parts by mass with respect to 100 parts by mass of the toner resin.

〔Release agent〕
Further, when the toner particles are configured to contain a release agent, various known waxes can be used as the release agent. As the wax, it is particularly preferable to use a polyolefin-based wax such as low molecular weight polypropylene, polyethylene, or oxidized polypropylene or polyethylene.

  The addition amount of the release agent is preferably 0.1 to 30 parts by mass, more preferably 1 to 10 parts by mass with respect to 100 parts by mass of the toner resin.

[Particle size of toner particles]
The toner particles preferably have a volume-based median diameter of 3 to 8 μm. When the volume-based median diameter is 3 to 8 μm, the reproducibility of fine lines and high image quality of photographic images can be achieved, and the amount of toner consumption can be reduced compared to the case of using a large particle size toner. be able to.

  The volume-based median diameter of toner particles is measured and calculated using a measuring device in which a computer system equipped with data processing software “Software V3.51” is connected to “Coulter Multisizer 3” (manufactured by Beckman Coulter). It is what is done. Specifically, 0.02 g of toner is added to 20 mL of a surfactant solution (for example, a surfactant solution in which a neutral detergent containing a surfactant component is diluted 10-fold with pure water for the purpose of dispersing the toner). Then, ultrasonic dispersion was performed for 1 minute to prepare a toner dispersion, and this toner dispersion was placed in a beaker containing “ISOTON II” (manufactured by Beckman Coulter) in a sample stand. Pipette until the indicated concentration is 8%. Here, a reproducible measurement value can be obtained by setting the concentration range. In the measurement apparatus, the measurement particle count is 25000, the aperture diameter is 50 μm, the frequency value is calculated by dividing the measurement range of 1 to 30 μm into 256, and the volume integrated fraction is 50 % Particle diameter is defined as the volume-based median diameter.

[Average circularity of toner particles]
The above toner particles preferably have an average circularity represented by the following formula (S) of 0.700 to 1.000, more preferably 0.850 to 1.000.
Formula (S): Average circularity = circumference of circle obtained from equivalent circle diameter / perimeter of particle projection image

(External additive)
The above toner particles can constitute the toner as it is, but in order to improve fluidity, chargeability, cleaning properties, etc., the toner particles are provided with a so-called post-treatment agent, a fluidizing agent and a cleaning aid. The toner may be constituted by adding external additives such as the above.
As the post-treatment agent, for example, inorganic oxide fine particles composed of silica fine particles, alumina fine particles, titanium oxide fine particles, etc., inorganic stearate compound fine particles such as aluminum stearate fine particles, zinc stearate fine particles, or strontium titanate, titanium Inorganic titanic acid compound fine particles such as zinc acid are listed. These can be used individually by 1 type or in combination of 2 or more types.
These inorganic fine particles are preferably subjected to surface treatment with a silane coupling agent, a titanium coupling agent, a higher fatty acid, silicone oil or the like in order to improve heat-resistant storage stability and environmental stability.
The total amount of these various external additives added is 0.05 to 5 parts by mass, preferably 0.1 to 3 parts by mass with respect to 100 parts by mass of the toner particles. In addition, various external additives may be used in combination.

(Developer)
The toner as described above can be used for image formation as a magnetic or non-magnetic one-component developer, but may be mixed with a carrier and used as a two-component developer. When the toner is used for image formation as a one-component developer, a non-magnetic one-component developer or a magnetic one-component developer containing about 0.1 to 0.5 μm of magnetic particles in the toner can be mentioned. Any of them can be used. In addition, when the toner is used for image formation as a two-component developer, the carrier is a conventionally known material such as a metal such as iron, ferrite, or magnetite, or an alloy of such a metal with a metal such as aluminum or lead. Magnetic particles can be used, and ferrite particles are particularly preferable. As the carrier, a coated carrier in which the surface of magnetic particles is coated with a coating agent such as a resin, a resin-dispersed carrier in which a magnetic fine powder is dispersed in a binder resin, or the like may be used.

[Surface protective layer]
The surface protective layer 13 is provided as necessary from the viewpoint of, for example, storability and pencil writing properties, and has a light-transmitting property.
Examples of the material constituting the surface protective layer 13 include film materials made of polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polypropylene (PP), and polystyrene (PS), and organic materials such as polystyrene resin, acrylic resin, and polyester resin. Examples include a cured product of a solution for forming a surface protective layer such as a solvent-soluble resin, a photocuring agent, a thermosetting agent, and a moisture curing agent. Furthermore, as the surface protective layer forming solution, a solution having the same composition as the material for forming the toner holding material layer 15 can be used.

  The thickness of the surface protective layer 13 is preferably 10 to 200 μm, more preferably 25 to 100 μm.

  According to the printed matter P described above, basically, since the toner image T is held by the toner holding material layer 15, the surface thereof is in a highly uniform state, and the portion where the image is formed and the other portions. There is no difference in height level between the parts, so high image quality is obtained.

[Reuse of toner particles]
From the printed matter P obtained by the image forming method of the present invention, toner particles are separated through a separation treatment, and a toner containing the separated toner particles (hereinafter also referred to as “reuse toner”) is an image. It is preferable that a printed material can be obtained by being reused as a forming material. Although the kind of the specific image forming method is not limited, it is particularly preferable that the method is used for the specific image forming method described above.
By alternately repeating the above-described specific image forming method and the toner particle separation process, a reuse system that achieves energy saving can be obtained.

In this reuse system, the particle shape degree of the toner particles used for forming the toner image constituting one print product P is A, and the particle shape degree of the separated toner particles from the one print product P is C. It is preferable that the following relational expression (II) is satisfied.
Relational expression (II): 1.0 ≧ C / A ≧ 0.9

  Reusable toner is constituted by the fact that (C / A), which indicates the degree of change in the particle shape of the toner particles before being subjected to toner image formation and after separation processing, is within the range of the above relational expression (II). Since the toner particles exhibit the same behavior as the initial toner particles, they can be used again in the above specific image forming method. On the other hand, when (C / A) indicating the degree of change in particle shape is less than 0.9, the toner particles constituting the reuse toner may behave differently from the initial toner particles. It becomes difficult to use it again in the specific image forming method.

  Specifically, the particle shape degree C of the toner particles constituting the reusable toner is determined by separating the toner particles from one printed matter P by performing an appropriate separation process, and using a scanning electron microscope (SEM) “JSM-”. 7401F ”(manufactured by JEOL Ltd.), an image with a magnification of 2,000 times is taken into a“ Luzex image analyzer ”(manufactured by Nireco), and each individual toner particle has a maximum projected image diameter. The minimum particle diameter is measured, the particle shape degree obtained by dividing the minimum diameter by the maximum diameter is obtained, and the average value of the particle shape degree for 100 toner particles is calculated.

  Specifically, the particle shape C of the toner particles constituting the reuse toner is preferably 0.40 to 1.00, more preferably 0.60 to 1.00.

The reusable toner particles can be dissolved or swollen with the toner holding material forming the toner holding material layer 15, and the toner holding material in a state where the toner image is held in the separation processing liquid that does not dissolve the toner particles. It is obtained by immersing layer 15. The object to be immersed in the separation treatment liquid is the printed material P or the toner holding material layer 15 in a state where the toner image T is peeled off from the image supporting substrate 11.
Further, the toner particles for reuse are subjected to a wiping process in which the surface holding the toner image T of the toner holding material layer 15 in a state where the toner image T is peeled off from the image supporting substrate 11 is rubbed with a cloth or the like. It can also be obtained by doing.
Further, when the toner particles for reuse are those having magnetism as the toner particles, the surface opposite to the surface where the toner holding material layer 15 of the image supporting substrate 11 is in contact with the printed material P. A magnetic force is applied from (the lower surface in FIG. 1B), the toner holding material layer 15 is peeled off while the toner image T is held on the image supporting base 11, and then the action of the magnetic force is released. A method of separating the toner particles from the image supporting substrate 11, or the toner holding material layer 15 in a state where the toner image T is held from the printed product P is peeled off, and then a magnetic force is applied to the toner particles and the toner holding material layer. It can also be obtained by a method of separating 15.

[Separation treatment solution]
Examples of the separation treatment liquid that can dissolve or swell the toner holding material and do not dissolve the toner particles include water, methyl alcohol, ethyl alcohol, ethylene glycol, polyethylene glycol, glycerin, and a mixture thereof. .
A surfactant or the like may be added to the separation treatment liquid in order to increase the affinity with the toner particles, the toner holding material for forming the toner holding material layer 15, the image supporting base material 11 and the like.

  The separation liquid solution of the toner particles and the toner holding material separated in the state of being immersed in the separation liquid can be collected, for example, by applying to a centrifuge.

In the case where the separated toner particles are those to which an external additive has been added before separation, for example, a reusable toner can be obtained by adding a sufficient amount of the external additive to a predetermined amount.
Further, for example, when the toner particles are manufactured using a material having shape memory property as a toner resin and the shape thereof is deformed, the shape is restored to the recovered deformed toner particles. After performing the separation process for performing an appropriate restoration process, a toner for reuse can be obtained by adding a short amount of external additive up to the desired amount.

  The external additive attached to the separated toner particles can be quantified by, for example, a fluorescent X-ray analyzer. Specifically, it can be measured by a fluorescent X-ray analyzer “XRF-1700” (manufactured by Shimadzu Corporation).

A reusable toner containing the separated toner particles as described above, and the energy required for forming the printed matter P (N) of the printed matter P (N) obtained by using toner particles granulated from raw materials. The difference between the print P (R) obtained and the energy required for forming the print P (R) is substantially from the initial granulation energy required to granulate toner particles from the raw material. This is a size obtained by subtracting a subtotal (hereinafter referred to as “processing energy related to reuse”) of energy related to separation processing or energy related to addition of a shortage of external additives.
Since the processing energy related to reuse is extremely small compared to the initial granulation energy, a large energy saving is achieved.

[Reuse of toner holding material layer]
In the reuse system, the toner holding material for forming the toner holding material layer 15 is separated from the one printed matter P through the separation process, and the separated toner holding material (hereinafter referred to as “separated toner”). Is also reused as an image forming material to form a new toner holding material layer (hereinafter also referred to as “reusable toner holding material layer”), and the specific image forming method described above. It is preferable to be used for.
Further, the toner holding material layer 15 is separated through the separation process, and the separated toner holding material layer is reused as an image forming material to form a reuse toner holding material layer. It may be used in an image forming method.
By alternately repeating the above-described specific image forming method and the toner holding material layer separation process, a reuse system that achieves energy saving can be obtained.

The reusable toner holding material layer is a toner that can be dissolved by being immersed in a separation treatment solution that can dissolve the toner holding material forming the toner holding material layer 15 and that does not dissolve other constituent materials. It is obtained by removing the separation treatment liquid from the separation treatment liquid solution of the holding material to obtain a separated toner holding material, and forming a layer using this toner holding material. The object to be immersed in the separation treatment liquid is the printed material P or the toner holding material layer 15 in a state where the toner image T is peeled off from the image supporting substrate 11.
Further, the toner holding material forming the toner holding material layer 15 is immersed and swollen in a swellable separation treatment liquid to remove the constituent material other than the toner holding material and the separation treatment liquid, and leave this still. Can also be obtained.
It can also be obtained by performing a wiping process in which the surface holding the toner image T of the toner holding material layer 15 peeled from the image supporting substrate 11 and holding the toner image T is scratched with a cloth or the like. it can.
Further, a magnetic force is applied to the toner holding material layer 15 in a state where the toner image T is held to remove the toner particles, and the solid toner holding material layer from which the toner particles have been removed is melted to use the layer. It can also be obtained by forming it or by allowing the solid toner holding material layer from which the toner particles have been removed to stand.

[Reuse of image support substrate]
Further, in the reuse system, the image support substrate is separated from one printed matter P through a separation process, and this separated image support substrate (hereinafter referred to as “reuse image support substrate”). Is preferably reused as an image forming material to obtain a printed product. In particular, it is preferably used for the specific image forming method described above. In this reuse system, it is preferable that the image supporting substrate is reused 10 times or more from the viewpoint of energy saving.
By alternately repeating the above-described specific image forming method and the separation process of the image supporting substrate, a reuse system that achieves energy saving can be obtained.

The reusable image supporting substrate is obtained by directly peeling the image fixing sheet 12 on which the toner image T is held.
Further, it can also be obtained by immersing the printed matter P in a separation treatment liquid in which the toner holding material can be dissolved or swollen and the image supporting substrate is not dissolved.

The energy required for the formation of the printed matter P (N) of the printed matter P (N) obtained using the initial image supporting substrate manufactured from the raw material, and the reused image support collected as described above. The difference between the print P (R) obtained using the substrate and the energy required for the formation of the print P (R) is substantially required to produce the initial image supporting substrate from the raw material. It is the magnitude obtained by subtracting the energy related to the separation process from the initial production energy.
Since the energy related to the separation process is extremely small compared with the initial production energy, a large energy saving is achieved.

  According to the method using the separated toner particles and / or the toner holding material layer and / or the image supporting substrate separated from the obtained printed matter P as described above, great energy saving is achieved as a whole.

<Second Embodiment>
As shown in FIG. 3, the image forming method according to the second embodiment of the present invention uses, for example, an image fixing sheet 12 in which a toner holding material layer 15 is formed on a surface protective layer 13. After the toner image T formed of toner particles is carried on the toner holding material layer 15 of the image fixing sheet 12, the image supporting base material 11 is laminated or laminated on the toner holding material layer 15. For example, the toner image T is fixed to the image supporting substrate 11 by performing a holding process using the fixing device 20 and burying and holding the toner image T in the toner holding material layer 15. This method has the same requirements as those in the first embodiment.
According to such an image forming method, an effect similar to that of the image forming method of the first embodiment can be obtained.

  In the image forming method according to the second embodiment, an appropriate intermediate transfer member is used instead of the surface protective layer 13, and an image fixing sheet in which the toner holding material layer 15 is formed on the intermediate transfer member is used. Similarly, the toner image T is carried on the toner holding material layer 15, and the toner holding material layer 15 is subjected to holding treatment while or after the image supporting base material 11 is laminated on the image fixing sheet. The toner image T may be fixed to the image supporting substrate 11 by embedding and holding the toner image T and then peeling off the intermediate transfer member.

<Third Embodiment>
As shown in FIG. 4, the image forming method according to the third embodiment of the present invention is a toner image formed by toner particles on the toner holding material layer 15 laminated on the image supporting substrate 11. After supporting T, the surface protective layer 13 is laminated or laminated on the toner holding material layer 15, and then, for example, holding processing is performed using the fixing device 20, and the toner holding material layer 15 is subjected to the toner image T. Is a method having the same requirements as those in the first embodiment except that the toner image T is fixed to the image supporting base 11 by being embedded and held.
In this image forming method, the surface protective layer 13 is made of a material in which the toner particles constituting the toner image T are not buried by the pressure in the holding process, specifically, polyethylene terephthalate (PET), polyethylene naphthalate (PEN). ), Polypropylene (PP), and polystyrene (PS).

  According to the image forming method as described above, basically, the toner image T can be fixed to the image supporting substrate 11 without applying heat, as in the image forming method of the first embodiment. Therefore, energy saving can be achieved, and since the toner image T is held by the toner holding material layer 15, the surface thereof is in a highly uniform state, and the portion where the image is formed and the other portion. In order to achieve a high image quality between the toner holding material layer 15 and the surface protective layer 13, the toner image T is sandwiched between the toner holding material layer 15 and the surface protective layer 13 in order from the end. Since the specific holding process for applying pressure is performed, the toner image T is held in a state where the air discharge port is always secured, and as a result, a clear image is presented without enclosing air. You can get a print P .

  Although the embodiments of the present invention have been specifically described above, the embodiments of the present invention are not limited to the above examples, and various modifications can be made.

  Hereinafter, specific examples of the present invention will be described, but the present invention is not limited thereto.

[Example 1]
(1) Preparation of initial printed matter After applying a silicone gel “SE1891H” (manufactured by Dow Corning Toray) (toner holding material) on a transparent PET film [A] (surface protective layer) having a thickness of 25 μm with a bar coater Then, the image fixing sheet [1] having a toner holding material layer having a thickness of 50 μm and a penetration of 45 was prepared by standing in a sunny place and curing with sunlight.
Paper [B] "J Paper" (manufactured by Konica Minolta Business Solutions, Inc.) (image support substrate) and "bizhub C 253" (manufactured by Konica Minolta Business Technologies, Inc.) with the fixing device removed, support this model After transferring the toner image formed using a commercially available developer, the image fixing sheet [1] is laminated on the paper [B] so that the toner holding material layer is in contact with the toner image. The toner image is formed on the paper [B] by passing through a fixing device composed of two rotating bodies adjusted so that the nip pressure is 2.5 × 10 ⁵ Pa and the pressing time is 0.06 seconds. An initial print [1] on which the held image fixing sheet [1] was superimposed was obtained.

(2) Separation treatment The image fixing sheet [1] holding the toner image is peeled from the paper [B] by pulling the transparent PET film [A] in the peeling direction from the initial print [1], and this is removed. The transparent PET film [A] is separated and recovered by immersing it in a separation treatment solution “esolv 21RS” (manufactured by Kaneko Chemical Co., Ltd.) and applying ultrasonic waves. Then, the toner particles and the silicone are separated by a centrifuge. Each was separated into a separation treatment solution in which the gel was dissolved, and each was collected.
The amount of the external additive in the collected toner is measured by quantifying with a fluorescent X-ray analyzer, and a short amount of external additive from the initial toner is added and mixed by a Henschel mixer for reuse. Toner [1-2] was obtained and further mixed with a carrier to obtain a reuse developer [1-2].
Further, the paper [B] separated by peeling was directly used as a reuse paper [B-2].
In addition, the silicone gel (separated toner holding material) is obtained by distilling the separation treatment liquid from the silicone gel separation treatment solution, and this is applied to the separated and collected transparent PET film [A] with a bar coater. Thus, a reusable image fixing sheet [1-2] having a flexible reusable toner holding material layer having a thickness of 50 μm and a penetration of 45 was produced.

(3) Production of Recycled Printed Material Using these reusable developer [1-2], reusable paper [B-2], and reusable image fixing sheet [1-2], according to Example 1 In the same manner as the initial print [1], a regenerated print [1-2] was obtained. The reproduced printed material [1-2] had no difference in visual image quality as compared with the initial printed material [1].
The degree of change (C / A) in the particle shape before and after the separation treatment in the initial print [1] and the regenerated print [1-2] was measured as described above, and was 0.980. It was confirmed that the toner particles can be reused even when the nip pressure is applied.

[Example 2]
The initial printed matter [2] was obtained in the same manner as in Example 1 except that the coated paper [C] was used instead of the paper [B] in the initial printed matter producing step.

Example 3
The initial printed matter [3] was obtained in the same manner as in Example 1 except that the white PET sheet paper [D] was used instead of the paper [B] in the initial printed matter producing step.

Example 4
In the same manner as Example 1 except that the nip pressure was changed to 6.5 × 10 ³ Pa and the pressing time was changed to 1 second, the initial printed product [4] was obtained. It was.

Example 5
In the initial print production process of Example 1, instead of the image fixing sheet [1], an acrylic adhesive “BPW6166” (Toyo Ink Manufacturing Co., Ltd.) was used on a transparent PET film [A] (surface protective layer) having a thickness of 25 μm. (Made) (toner holding material) was applied with a bar coater and then heated and cured at 100 ° C. for 3 minutes, and an image fixing sheet [2] having a toner holding material layer having a thickness of 25 μm was used. The initial printed matter [5] was obtained in the same manner except that the nip pressure was changed to 3.5 × 10 ⁷ Pa and the pressing time was changed to 0.01 seconds.

Example 6
The initial printed product [6] was obtained in the same manner as in Example 5 except that the coated paper [C] was used instead of the paper [B] in the process for preparing the initial printed product.

Example 7
An initial print product [7] was obtained in the same manner as in Example 5 except that white PET sheet paper [D] was used instead of paper [B] in the initial print production process.

Example 8
The hydrogel “Technogel AG” having a thickness of 100 μm on the transparent PET film [A] (surface protective layer) having a thickness of 25 μm was used instead of the image fixing sheet [1] in the production process of the initial printed matter of Example 1. (Sekisui Plastics Kogyo Co., Ltd.) In the same manner as in the above, except that an image fixing sheet [3] having a flexible toner holding material layer obtained by superimposing (toner holding material) was used. [8] was obtained.

Example 9
An initial print product [9] was obtained in the same manner as in Example 8, except that the coated paper [C] was used instead of the paper [B] in the production process of the initial print product.

Example 10
An initial print product [10] was obtained in the same manner as in Example 8 except that white PET sheet paper [D] was used instead of paper [B] in the initial print production process.

Example 11
“Bizhub C 253” (manufactured by Konica Minolta Business Technologies Co., Ltd.) with the fixing device removed on the toner holding material layer of the image fixing sheet [1] obtained by the same method as in image fixing sheet production example 1 After transferring a toner image formed using a corresponding commercially available developer, the paper [B] is laminated while being in contact with the toner image on the image fixing sheet [1] toner holding material layer. Is passed through a fixing device composed of two rotating bodies adjusted to 2.5 × 10 ⁵ Pa and a pressing time of 0.06 seconds without being heated, thereby pressing toner on paper [B]. An initial print [11] in which an image fixing sheet holding an image was laminated was obtained.

Example 12
Silicone gel “SE1891H” (manufactured by Dow Corning Toray) (toner holding material) is coated on paper [B] (image supporting substrate) with a bar coater, then left in a sunny place and exposed to sunlight. By curing, a toner holding material layer having a thickness of 50 μm and a penetration of 45 was formed, thereby obtaining an image support [1].
Toner formed on the toner holding material layer of the image support [1] using “bizhub C 253” (manufactured by Konica Minolta Business Technologies) with a fixing device removed, using a commercially available developer corresponding to the model. After the image is transferred, a transparent PET film [A] (surface protective layer) having a thickness of 25 μm is laminated so as to be in contact with the toner image on the toner holding material layer of the image support [1], while the nip pressure is 2 The toner image is formed on the paper [B] by passing through a fixing device composed of two rotating bodies adjusted to 5 × 10 ⁵ Pa and a pressing time of 0.06 seconds without heating. An initial print [12] in which the held image fixing sheets were laminated was obtained.

[Comparative Example 1]
Silicone gel “SE1891H” (manufactured by Dow Corning Toray) (toner holding material) (toner holding material) is applied on a transparent PET film [A] (surface protective layer) having a thickness of 25 μm using a bar coater, and then left in a sunny place. Then, an image fixing sheet [1] having a toner holding material layer having a thickness of 50 μm and a penetration of 45 was prepared by curing with sunlight.
Paper [B] "J Paper" (manufactured by Konica Minolta Business Solutions, Inc.) (image support substrate) and "bizhub C 253" (manufactured by Konica Minolta Business Technologies, Inc.) with the fixing device removed, support this model After the toner image formed using a commercially available developer is transferred, the paper [B] on which the toner image is transferred is fixed on a flat iron plate, and the image fixing sheet [1] is fixed on the opposite flat iron plate. The transparent PET film [A] is fixed in a state where it is in contact with the iron plate, and is pressed by a pressure molding device adjusted to pressurize at a pressure of 2.5 × 10 ⁵ Pa for 0.06 seconds, whereby the paper [B] An initial printed product for comparison [13] was obtained, in which an image fixing sheet holding a toner holding material layer was laminated thereon.

[Comparative Example 2]
The initial printed matter [14] was obtained in the same manner as in the preparation process of the initial printed matter of Comparative Example 1 except that the coated paper [C] was used instead of the paper [B].

[Comparative Example 3]
The initial printed matter [15] was obtained in the same manner as in the preparation process of the initial printed matter of Comparative Example 1 except that white PET sheet paper [D] was used instead of paper [B].

[Evaluation for image quality 1: Sharpness of image quality]
For each of the obtained prints [1] to [15], 20 monitors were visually observed, and “○” indicates that the image was clear, and “n” indicates that the image was not clear. As “X”, the sensory evaluation was performed with “good” when 18 or more monitors were “◯” and “bad” in other cases. The results are shown in Table 1.

[Evaluation of image quality 2: presence or absence of air sealing]
Further, when the printed products [1] to [15] were observed with a magnifying glass, the printed products [1] to [12] were found to have no air-enclosed portions, but the printed materials [13] according to the comparative example [13]. ] To [15], the location where air was sealed was confirmed.

DESCRIPTION OF SYMBOLS 11 Image support base material 12 Image fixing sheet 13 Surface protective layer 15 Toner holding material layer 20 Fixing device 21,22 Rotating body N Nip part P Printed matter T Toner image

Claims (11)

After a toner image formed of toner particles is carried on an image support substrate, a toner holding material layer is laminated on the image support substrate and a holding process is performed to hold the toner image on the toner holding material layer. An image forming method for forming a printed matter by
The image forming method, wherein the holding treatment is to sequentially apply pressure from the end to a laminated body in which a toner holding material layer is laminated on an image supporting base material on which a toner image is carried. . After a toner image formed of toner particles is carried on the toner holding material layer, an image supporting base material is laminated on the toner holding material layer and a holding process is performed to hold the toner image on the toner holding material layer. An image forming method for forming a printed matter by
The image forming method, wherein the holding treatment is to sequentially apply pressure from the end to a laminate in which an image supporting base material is laminated on a toner holding material layer carrying a toner image. . After a toner image formed of toner particles is carried on a toner holding material layer laminated on an image supporting base material, a surface protective layer is laminated on the toner holding material layer and a holding treatment is performed thereon. An image forming method for forming a printed matter by holding a toner image on a toner holding material layer,
The image forming method, wherein the holding treatment is performed by sequentially applying pressure from the end to a laminated body in which a surface protective layer is laminated on a toner holding material layer carrying a toner image.   The image forming method according to claim 1, wherein the holding process is to pass through a nip portion formed by pressing two rotating bodies against each other. The image forming method according to claim 4, wherein a nip pressure applied in the nip portion is 1.0 × 10 ^{3 to} 1.0 × 10 ⁸ Pa.   The image forming method according to claim 4, wherein a pressing time for pressing at the nip portion is 0.001 to 30 seconds.   An image forming method, comprising: obtaining a print using toner particles separated from the print obtained by the image forming method according to claim 1.   An image forming method, comprising: obtaining an image using an image supporting substrate separated from the image obtained by the image forming method according to claim 1. After a toner image formed of toner particles is carried on an image support base material, a toner holding material layer is laminated on the image support base material, and a holding process of sequentially applying pressure from the end is performed to hold the toner. An image forming method for forming a printed matter by holding a toner image on a material layer,
4. At least one of toner particles constituting the toner image, the toner holding material layer, and the image support base material is separated from a printed material obtained by the image forming method according to any one of claims 1 to 3. An image forming method, wherein After a toner image formed of toner particles is carried on the toner holding material layer, an image supporting base material is laminated on the toner holding material layer, and a holding process is performed in which pressure is sequentially applied from the end to perform the toner holding. An image forming method for forming a printed matter by holding a toner image on a material layer,
4. At least one of toner particles constituting the toner image, the toner holding material layer, and the image support base material is separated from a printed material obtained by the image forming method according to any one of claims 1 to 3. An image forming method, wherein After a toner image formed of toner particles is carried on a toner holding material layer laminated on an image supporting substrate, a surface protective layer is laminated on the toner holding material layer, and pressure is sequentially applied from the end. An image forming method for forming a printed matter by applying a holding process to hold a toner image on the toner holding material layer,
4. At least one of toner particles constituting the toner image, the toner holding material layer, and the image support base material is separated from a printed material obtained by the image forming method according to any one of claims 1 to 3. An image forming method, wherein

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