JP3430382B2 - Image forming material and image forming method using the same - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming material capable of obtaining an image having high sensitivity and sufficient density and an image forming method using the same.

[0002]

2. Description of the Related Art Conventionally, a recording method has been known in which light energy such as a laser beam is focused and irradiated onto a recording material to melt and deform a part of the material, or to scatter, burn or evaporate and remove the material. These are dry processes that do not require a processing liquid such as chemicals, and have the advantage that high contrast can be obtained by melting and deforming only the light irradiation part, scattering or evaporation removal, and resist materials. It is used as an optical recording material such as an optical disk, an image forming material which makes itself a visible image, and the like. These image forming methods are hereinafter defined as ablation.

For example, JP-A-59-5447 and 59-105638.
JP-A-55-132536 and JP-A-57-2778 disclose a method of photo-decomposing a binder resin by pattern exposure to form a resist pattern, and materials therefor.
No. 8 and No. 57-103137, it is possible to record information by exposing a thin film of an inorganic compound provided by a vapor deposition method to melt deformation of the film, and JP-A 64-56591 and 1-99887. Issue 6-4
[0163] A material for recording information by removing the colored binder layer by photothermal conversion is disclosed in U.S. Pat. No. 4,245,003.
Nos. And the like each describe an image-forming material having an image-forming layer containing graphite or carbon black.

[0004]

When the image forming material of the above-mentioned US patent is used, image formation is performed by burning and / or scattering and removing the image forming layer at the same time as image exposure, and therefore, by ablation in air. The fine powder of the scattered colorant layer is scattered.

Further, Japanese Patent Laid-Open No. 4-506709 and Japanese Patent Laid-Open No. 6-43635
U.S. Pat.Nos. 5,156,938, 5,171,650, 5,256,
No. 506 and the like describe an image-forming material having an image-forming layer containing a photothermal conversion substance that absorbs a laser beam and converts it into heat energy and a binder resin that can be decomposed by heat as an essential component. Japanese Patent Publication No. 4-506709, U.S. Pat.Nos. 5,156,938, 5,171,650, and 5,256,506 are those in which a transfer sheet receives an image forming layer which is decomposed and broken by a binder resin. If
The scattering of fine powder of the colorant layer, which is scattered by ablation in the air, is improved.

However, when the conventional transfer target is used, the transfer target itself has an action of suppressing the ablation phenomenon, and as a result, exposure with a considerably high illuminance is required to obtain sufficient image density and resolution. Since energy is required, there has been a problem that the image forming apparatus is upsized and the manufacturing cost is increased.

Further, in JP-A-4-327982 and 329783, an image forming material in which a photothermal conversion layer containing a substance that absorbs a laser beam to convert it into heat energy and a layer containing a colorant are sequentially laminated on a support The method for forming an image by irradiating the surface with a laser beam, and then sticking and peeling off an image receptor having a heat-fusion layer on the surface is described.

When such an image receptor is used, when the image receptor is peeled off after laser exposure, a part of the adhesive substance of the heat fusion layer remains on the support together with the ablated image forming layer. However, there is a problem in that the image forming material is contaminated.

The present invention has been made in view of the above circumstances, and an object of the invention is to provide an image forming material capable of obtaining an image having high sensitivity, no stain, and high resolution, and an image forming method using the same. is there.

[0010]

The above object of the present invention is achieved by the following constitution.

1) An image forming layer and a transferred material are provided in this order on a support, and the image forming layer undergoes ablation by exposure to high-density energy light, and the image forming layer and the transferred material in the irradiated portion are exposed. The binding force of is not substantially changed, the binding force between the support and the image forming layer can be lowered, and
An image forming material capable of transferring the image forming layer of the irradiation portion to the transfer target by separating the transfer target from the support.
Of the image forming layer containing a ferromagnetic metal powder, and the transferred body contains fine particles, and a part of the fine particles protrudes from the surface of the transferred body. The number of fine particles whose height is 1 μm or more and 20 μm or less
An image forming material characterized by being present in an amount of 10 or more per mm ² .

2) An image forming layer and a transferred material are provided in this order on a support, and the image forming layer undergoes ablation by exposure to high-density energy light, and the image forming layer and the transferred material in the irradiated portion are exposed. The binding force of is not substantially changed, the binding force between the support and the image forming layer can be lowered, and
An image forming material capable of transferring the image forming layer of the irradiation portion to the transfer target by separating the transfer target from the support.
An image characterized in that the image forming layer contains a ferromagnetic metal powder, and the surface roughness of the surface of the transferred body facing the image forming layer has an Ra value of 1.0 to 0.04 μm. Forming material.

[0013]

3 ) An image forming layer and a transferred material are provided in this order on a support, and the image forming layer undergoes ablation by exposure to high-density energy light , so that the image forming layer and the transferred material at the irradiation portion The binding force of is not substantially changed, the binding force between the support and the image forming layer can be lowered, and
An image forming material capable of transferring the image forming layer of the irradiation portion to the transfer target by separating the transfer target from the support.
2. The image forming material, wherein the image forming layer contains a ferromagnetic metal powder, and the transferred material contains a polyolefin resin.

4 ) The image-forming material as described in 3 above, wherein the polyolefin resin of the transferred material is a polypropylene resin.

5 ) The surface of a support for supporting the transfer target with a coating liquid containing polypropylene resin.
5. The image forming material as described in 3 or 4 above, which has a polypropylene resin layer obtained by coating and drying the surface of the image forming layer .

6) An image forming layer and a transferred material are provided in this order on a support, and the image forming layer undergoes ablation by exposure to high-density energy light, and the image forming layer and the transferred material at the irradiated portion are exposed. The binding force of is not substantially changed, the binding force between the support and the image forming layer can be lowered, and
An image-forming material of which the image-forming layer at the irradiation portion can be transferred to the transfer-receiving body by separating the transfer-receiving body from the support, and the image-forming layer contains a ferromagnetic metal powder and Is a resin layer having voids formed by melt extrusion coating , or by melt extrusion coating
An image forming material, which is a resin layer having a formed inorganic pigment.

[0018]

7 ) Image-exposing the image-forming material described in any one of 1 to 6 above with high-density energy light
Ablation occurs, the binding force between the support in the exposed area and the image forming layer is reduced, and the transfer-receiving body and the support are separated, so that the image forming layer in the exposed area is transferred onto the transfer-receiving material and the unexposed area is transferred. An image forming method comprising forming an image while leaving an image forming layer on a support.

The present invention will be described in detail below.

<Image Forming Material> The image forming material of the present invention basically comprises an image forming layer, a support for holding the image forming layer, and a transferred material.

Support As the support, acrylic acid ester, methacrylic acid ester, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polycarbonate, polyarylate, polyvinyl chloride, polyethylene, polypropylene, polystyrene, nylon, aromatic polyamide, Examples of the transparent support include resin films such as polyether ether ketone, polysulfone, polyether sulfone, polyimide, and polyetherimide, and further resin films formed by laminating two or more layers of the above resins.

In the present invention, the support is a support capable of transmitting 50% or more of light having the wavelength of the exposure light source, and it is preferable that the support is stretched into a film and heat-set in terms of dimensional stability, and the effect of the present invention is obtained. Fillers such as titanium oxide, zinc oxide, barium sulfate, and calcium carbonate may be added within a range that does not hinder it. The thickness of the transparent support is about 10 to 500 μm,
It is preferably 25 to 250 μm.

Image-Forming Layer The image-forming layer of the present invention basically comprises a ferromagnetic metal powder, a coloring agent and a binder resin for holding the same.

Colorant The colorant used in the present invention is a colorant capable of absorbing the wavelength light of the exposure light source, and for example, carbon black is a colorant having a wide absorption from the ultraviolet region to the visible and infrared regions, so that it is preferable. Can be used.

In addition, inorganic or organic pigments and dyes are used, which are composed of monochromatic, 2-color mixed and 3-color mixed pigment compounds.

Examples of the inorganic pigments include titanium dioxide, carbon black, zinc oxide, Prussian blue, cadmium sulfide, iron oxide and chromates of lead, zinc, barium and calcium. As an organic pigment,
Examples thereof include azo-based, thioindigo-based, anthraquinone-based, anthanthrone-based, triphendioxazine-based pigments, vat dye pigments, phthalocyanine pigments (copper phthalocyanine and its derivatives), and quinacridone pigments.
Examples of organic dyes include acid dyes, direct dyes and disperse dyes.

When the wavelength of the exposure light source is near-infrared light, the near-infrared light absorbers include organic compounds such as cyanine-based, polymethine-based, azurenium-based, squalium-based, thiopyrylium-based, naphthoquinone-based, anthraquinone-based dyes, and phthalocyanine-based dyes. , Azo-based and thioamide-based organometallic complexes are preferably used, and specifically, JP-A-63-139191,
64-33547, JP-A 1-160683, 1-280750, 1-
293342, 2-2074, 3-26593, 3-30991, and
3-34891, 3-36093, 3-36094, 3-36095,
The compounds described in JP-A 3-42281, JP-A 3-97589, JP-A 3-103476 and the like can be mentioned.

Metal atom-containing particles can be preferably used as a colorant that further exhibits the effects of the present invention. When the metal atom-containing particles are used as the coloring material in the image forming layer of the image forming material of the present invention, the effect becomes more remarkable in terms of sensitivity, resolution and stains on exposed areas.

Metal atom-containing powder The metal atom-containing powder is iron, chromium, manganese, cobalt, nickel, copper, zinc, titanium, silver, aluminum,
It is a generic term for compounds such as metals such as gold and platinum or oxides thereof.

The metal atom-containing particles preferably used in the present invention include ferromagnetic iron oxide powder, ferromagnetic metal powder, cubic crystal plate powder, and the like, and among them, ferromagnetic metal powder can be preferably used.

As the ferromagnetic iron oxide, γ-Fe ₂ O ₃ , Fe
₃ O ₄ or FeO _x (1.33 <x <1.5
Examples thereof include those represented by 0).

Examples of ferromagnetic metal powders include Fe and Co,
Fe-Al system, Fe-Al-Ni system, Fe-Al-Zn system, Fe-Al-Co system, Fe-Al
-Ca, Fe-Ni, Fe-Ni-Al, Fe-Ni-Co, Fe-Ni-Zn
System, Fe-Ni-Mn system, Fe-Ni-Si system, Fe-Ni-Si-Al-Mn system, Fe-N
i-Si-Al-Zn system, Fe-Ni-Si-Al-Co system, Fe-Al-Si system, Fe-Al-
Zn series, Fe-Co-Ni-P series, Fe-Co-Al-Ca series, Ni-Co series, Fe, N
Ferromagnetic metal powders such as metal magnetic powders containing i, Co, etc. as a main component are preferable, and Fe-based metal powders are preferable among them.
Examples include cobalt-containing iron oxide-based magnetic powders such as adhered Fe3O4 and Co-containing magnetic FeOx (4/3 <x <3/2) powder.
From the viewpoint of corrosion resistance and dispersibility, among Fe-based metal powders, Fe-Al-based, Fe-Al-Ca-based, Fe-Al-Ni-based, Fe-Al-Zn
System, Fe-Al-Co system, Fe-Ni-Si-Al-Co system, Fe-Co-Al-Ca system and other Fe-Al-based ferromagnetic powders are preferable, and among them, contained in the ferromagnetic powder The content ratio of Fe atoms to Al atoms is Fe: Al = 100: 1 to 100: 20 in terms of atomic number ratio, and the analysis depth of the ferromagnetic powder by ESCA (X-ray photoelectron spectroscopy) is 100Å Those having a structure in which the content ratio of Fe atoms and Al atoms present in the following surface regions is Fe: Al = 30: 70 to 70:30 in terms of atomic number ratio, or Fe atoms, Ni atoms, and Al atoms Si atom, and further at least one of Co atom and Ca atom is contained in the ferromagnetic powder, the content of Fe atom is 90 atom% or more, the content of Ni atom is 1 to 10 atom%, and the content of Al atom is 0.1-5 atomic%, Si atom content 0.1-5 atomic%, Co atom or Ca
Atom content (total amount if both are included) is 0.1-1
Fe atoms, Ni atoms, Al atoms, Si atoms, Co atoms and / or 3 atomic% and existing in the surface region of 100 Å or less at the analysis depth by ESCA (X-ray photoelectron spectroscopy) of the ferromagnetic powder The content ratio with Ca atoms is Fe: Ni: Al:
Si: (Co and / or Ca) = 100: (4 or less): (10 to 6)
Those having a structure of 0) :( 10 to 70) :( 20 to 80) are preferable.

The shape of the ferromagnetic powder has a major axis diameter of 0.30 μm.
It is m or less, preferably 0.20 μm or less. Such a ferromagnetic powder improves the surface property of the colorant layer.

Examples of the hexagonal plate-like powder include hexagonal ferrite such as barium ferrite and strontium ferrite, in which a part of iron element is another atom (Ti,
Co, Zn, In, Mn, Ge, Hb, etc.),
Such ferrite magnetic materials are used in IEEE trans on MAG, p18,
16 (1982). Among these, as an example of the barium ferrite magnetic powder, the average particle size (diagonal height of the plate surface of the hexagonal ferrite) in which a part of Fe is replaced with at least Co and Zn is 400 to 900Å, The plate ratio (the value obtained by dividing the length of the diagonal of the plate surface of the hexagonal ferrite by the plate thickness) is 2.0 to 10.0. In addition, barium ferrite magnetic powder further contains a portion of Fe as Ti, In, M
It may be substituted with a transition metal such as n, Cu, Ge or Sn.

A method for producing a cubic magnetic powder is, for example, melting oxides and carbonates of respective atoms necessary for forming a target barium ferrite together with a glass forming substance such as boric acid, A glass crystal of a method in which the obtained melt is rapidly cooled to form a glass, and then this glass is heat-treated at a predetermined temperature to precipitate crystallized barium ferrite crystal powder, and finally glass components are removed by heat treatment. In addition to the chemical conversion method, there are coprecipitation-firing method, hydrothermal synthesis method, flux method, alkoxide method, plasma jet method and the like.

The content of the metal atom-containing particles contained in the image forming layer is about 50 to 99% by weight of the image forming layer forming components,
It is preferably 60 to 95% by weight.

Binder Resin As long as the binder resin can sufficiently retain the colorant capable of absorbing the wavelength light of the exposure light source and the metal atom-containing powder,
It can be used without particular limitation.

Typical examples of such a binder resin are vinyl chloride resins such as polyurethane, polyester, and vinyl chloride copolymers, and these resins are
_{-SO 3 M, -OSO 3 M,} -COOM and -PO (OM _{1) 2} [here, M is a hydrogen atom or an alkali metal, M ₁ is a hydrogen atom, an alkali metal or an alkyl group. ] It is preferable to include a repeating unit having at least one kind of polar group selected from the following. By using a resin having such a polar group introduced, the dispersibility of the magnetic powder can be improved. still,
The content ratio of this polar group in each resin is about 0.1 to 8.0 mol%, preferably 0.2 to 6.0 mol%.

The binder resins may be used alone or in combination of two or more kinds, and when two or more kinds are mixed and used, for example, the ratio of polyurethane and / or polyester to vinyl chloride resin is 90:10. 10 to 90:70, preferably 70:30 to 30:70.

As the polar group-containing vinyl chloride, for example,
Resins having hydroxyl groups such as vinyl chloride-vinyl alcohol copolymers, Cl-CH ₂ CH ₂ SO ₃ M, Cl-CH ₂ CH ₂ OSO ₃ M, Cl-CH ₂ C0 ₂
It can be synthesized by an addition reaction with a compound having a polar group such as M and Cl—CH ₂ P (═O) (OM ₁ ) ₂ and a chlorine atom. An example is shown below.

-CH ₂ C (OH) H- + Cl-CH ₂ CH ₂ SO ₃ Na → -CH ₂ C (OCH ₂ CH ₂ SO ₃ Na) H- The polar group-containing vinyl chloride resin has a polar group. A predetermined amount of a reactive monomer having an unsaturated bond into which a repeating unit containing is introduced is charged into a reaction container such as an autoclave, and a general radical polymerization initiator such as benzoyl peroxide and azobisisobutyronitrile, or redox polymerization initiation Agent,
It can be obtained by polymerization using a cationic polymerization initiator or the like, and specific examples of the reactive monomer for introducing the sulfonic acid or a salt thereof include vinyl sulfonic acid, allyl sulfonic acid, methacryl sulfonic acid, p- Unsaturated hydrocarbon sulfonic acids such as styrene sulfonic acid and salts thereof can be mentioned. Further, when introducing a carboxylic acid or a salt thereof, for example, (meth) acrylic acid or maleic acid may be used, and when introducing a phosphoric acid or a salt thereof, a (meth) acrylic-2-phosphate ester may be used.

Further, in order to improve the thermal stability of the binder resin, it is preferable to introduce an epoxy group into the vinyl chloride copolymer. In this case, the content of the repeating unit having an epoxy group in the copolymer is about 1 to 30 mol%, preferably 1 to 20 mol%, and examples of the monomer for introducing the epoxy group include glycidyl acrylate. be able to.

The polyester having a polar group can be synthesized by a dehydration condensation reaction between a polyol and a polybasic acid partially having a polar group. Examples of the polybasic acid having a polar group include 5-sulfoisophthalic acid and 2 -Sulfoisophthalic acid, 4-
Examples thereof include sulfoisophthalic acid, 3-sulfophthalic acid, dialkyl 5-sulfoisophthalate, dialkyl 2-sulfoisophthalate, dialkyl 4-sulfoisophthalate, dialkyl 3-sulfophthalate and alkali metal salts thereof. Methylolpropane, hexanetriol, glycerin, trimethylolethane,
Neopentyl glycol, pentaerythritol, ethylene glycol, propylene glycol, 1,3-butanediol, 1,4-butanediol, 1,6-hexanediol,
Diethylene glycol, cyclohexane dimethanol, etc. can be mentioned.

The polyurethane having a polar group can be synthesized by reacting a polyol with a polyisocyanate, and specifically, it can be obtained by reacting a polyol as a polyol with a polybasic acid partially having a polar group. It is synthesized by using the obtained polyester polyol as a raw material. Also, as the polyisocyanate, diphenylmethane-4,4'-diisocyanate, 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, 1,5-
Examples thereof include naphthalene diisocyanate and lysine isocyanate methyl ester. As another method for synthesizing a polyurethane having a polar group, polyurethane having a hydroxyl group and Cl-CH ₂ CH having a polar group and a chlorine atom may be used.
₂ SO ₃ M, Cl-CH ₂ CH ₂ OSO ₃ M, Cl-CH ₂ C0 ₂ M, Cl-CH ₂ P (= O) (O
Addition reactions with compounds such as M ₁ ) ₂ are also effective.

Other binder resins include vinyl chloride resins such as vinyl chloride-vinyl acetate copolymers, polyolefin resins such as butadiene-acrylonitrile copolymers, polyvinyl acetal resins such as polyvinyl butyral, and celluloses such as nitrocellulose. Resin, styrene resin such as styrene-butadiene copolymer, acrylic resin such as polymethylmethacrylate, polyamide,
A phenol resin, an epoxy resin, a phenoxy resin or the like may be used in combination, but when these are used in combination, it is preferably 20% by weight or less of the total binder resin.

The content of the binder resin in the image forming layer is about 1 to 50% by weight, preferably 5 to 40% by weight based on the components for forming the image forming layer.

Other Additives In the image forming layer, additives such as a lubricant, a durability improver, a dispersant, an antistatic agent, a filler, a filler and a curing agent are added to the image forming layer so long as the effects of the present invention are not impaired. You may make it contain.

Examples of the lubricant include fatty acids, fatty acid esters, fatty acid amides, (modified) silicone oils, (modified) silicone resins, fluororesins, fluorocarbons and the like, and durability improvers such as polyisocyanate. Can be mentioned. Examples of the dispersant include fatty acids having 12 to 18 carbon atoms such as lauric acid and stearic acid and their amides, alkali metal salts, alkaline earth metal salts; polyalkylene oxide alkyl phosphates, lecithin, and trialkyl polyolefin oxy Quaternary ammonium salts; azo compounds having a carboxyl group and a sulfone group, and the like can be mentioned. As the antistatic agent,
Cationic surfactants, anionic surfactants, nonionic surfactants, polymeric antistatic agents, conductive fine particles, etc. Other "11290 chemical products" Chemical Industry Daily, p.875-876, etc. And the like.

Filler As the filler, carbon black, graphite,
TiO ₂ , BaSO ₄ , ZnS, MgCO ₃ , CaCO ₃ , ZnO, CaO, WS ₂ , MoS
₂ , MgO, SnO ₂ , Al ₂ O ₃ , α-Fe ₂ O ₃ , α-FeOOH, SiC, Ce
_{O 2, BN, SiN, MoC} , BC, WC, titanium carbide, corundum, artificial diamond, garnet, garnet, silica rock, tripoli, diatomaceous earth, an inorganic filler and polyethylene resin particles, such as dolomite, fluororesin particles, guanamine resin Examples thereof include organic fillers such as particles, acrylic resin particles, silicone resin particles, and melamine resin particles.

Examples of the filler include inorganic fine particles and organic resin particles, which may also serve as a release agent. Examples of the inorganic fine particles include silica gel, calcium carbonate, titanium oxide, acid clay, activated clay, alumina and the like, and organic fine particles include fluororesin particles,
Resin particles such as guanamine resin particles, acrylic resin particles, and silicon resin particles can be mentioned. These inorganic / organic resin particles differ depending on the specific gravity, but it is preferable to add 0.1 to 70% by weight.

Curing Agent Furthermore, the curing agent can be used without particular limitation as long as it can cure the image forming layer. As such a curing agent, for example, polyurethane in the binder resin described above is synthesized. Examples thereof include polyisocyanate used in the process.

By curing the image forming layer by adding such a curing agent, not only the durability of the formed image can be enhanced, but also the background stain on the ablated portion can be eliminated. The amount of these additives added is about 0 to 20% by weight, preferably 0 to 15% by weight.

The thickness of the image forming layer is 0.05 to 5.0 μm.
m, preferably 0.1 to 3.0 μm.
Further, the image forming layer may be composed of a single layer or multiple layers having different compositions. In the case of being composed of multiple layers, the wavelength light of the exposure light source can be absorbed in the layer on the side close to the support. It is preferable to add more colorant. Further, a colorant capable of absorbing wavelength light other than the wavelength light of the exposure light source may be added to the layer on the side far from the support.

Method of Forming Image Forming Layer The image forming layer comprises, for example, magnetic powder, binder resin and, if necessary, lubricant, durability improver, dispersant, antistatic agent, filler, filler, curing agent and the like. Kneading with a solvent,
A high-concentration magnetic coating is prepared, and then this high-concentration magnetic coating is diluted to obtain a coating magnetic coating, which is applied onto a support and dried.

As the solvent, alcohols (ethanol, propanol, etc.), cellosolves (methyl cellosolve, ethyl cellosolve), aromatics (toluene, xylene, chlorobenzene, etc.), ketones (acetone, methyl ethyl ketone, etc.), ester series Use solvents (ethyl acetate, butyl acetate, etc.), ethers (tetrahydrofuran, dioxane, etc.), halogen solvents (chloroform, dichlorobenzene, etc.), amide solvents (eg dimethylformamide, N-methylpyrrolidone, etc.), etc. You can Further, for kneading and dispersing the components of the image forming layer, a two-roll mill, a three-roll mill, a ball mill, a pebble mill, a cobol mill, a tron mill, a sand mill, a sand grinder,
Sqegvari attritor, high speed impeller disperser, high speed stone mill, high speed impact mill, disper, high speed mixer, homogenizer, ultrasonic disperser, open kneader, continuous kneader, etc. can be used.

The image-forming layer is formed on the support by coating and drying with an extrusion type extrusion coater, for example. If necessary, the magnetic powder may be aligned, or a calendar treatment may be performed to make the surface properties of the image forming layer uniform. In particular, in order to obtain a high-resolution image, it is preferable to orient the magnetic powder because the cohesive force in the layer can be easily controlled.

When another layer of the image forming layer is provided, the coating and drying may be repeated for each layer, but the wet-on-
It may be applied in multiple layers by a wet method and dried. In that case, reverse roll, gravure roll, air doctor coater, blade coater, air knife coater, squeeze coater, impregnation coater, bar coater, transfer roll coater, kiss coater, cast coater or spray coater and the like can be applied by a combination with an extrusion coater. it can.

In the wet-on-wet multi-layer coating, since the upper layer is applied while the lower layer is in a wet state, the adhesion between the upper and lower layers is improved.

Transfer Target The transfer target used in the present invention does not substantially change the binding force between the image forming layer in the irradiated portion and the transfer target due to the exposure to the high-density energy light, and the support and the image forming layer are not changed. Is a member capable of lowering the binding force of and the image forming layer of the irradiation part can be transferred by separating the transfer target and the support.

In the image forming method of the present invention described later,
The transferred material provided for peeling after image exposure to receive an image forms a layer of a resin having self-supporting property, or uses a resin film used as a support as described above as a transferred material support. It is also possible to use, for example, a resin film provided with an image receiving layer capable of receiving the image forming layer of the high energy light irradiation portion.

As a first form of the transferred material used in the present invention, the transferred material contains fine particles, and a part of the fine particles protrudes from the surface of the transferred material. The number of fine particles having a protruding height of 1 μm or more and 20 μm or less is 10 or more per 1 mm ² .

Referring to the drawings, FIG. 1 is a schematic view of one preferred embodiment of the image forming material of the present invention.
A is a transfer target having the fine particle-containing layer 4 on the support 3,
The image forming material is adjacent to the material having the image forming layer 2 on the image forming layer support 1. B is an image-forming material in which the transfer-receiving material provided with the polyolefin layer 5 on the support 3 is adjacent to the material having the image-forming layer 2 on the support 1 for the image-forming layer, and C is extrusion laminating and coating. Alternatively, it is an image forming material in which the transfer target 6 made of a self-supporting film is adjacent. FIG. 2 is a cross-sectional view of an example of the transferred material of the present invention. In this structure, a resin layer containing fine particles is laminated on the support 3, and a part of the resin layer protrudes from the surface of the transferred material. Of these, 7 are fine particles showing protrusions exceeding a line 9 representing a height of 1 μm, and 8 are fine particles which are smaller than or completely buried in the transfer target. It is important that the state of the fine particles necessary for the present invention is 7 and that the number of the protruding fine particles satisfies the above conditions.

The fine particles added to the transferred material of the present invention are
As long as the above conditions are satisfied, for example, the same filler as that used as the image forming layer additive can be used.

If the average particle size of the fine particles is 1 μm or less, the protruding height cannot satisfy the above conditions.

When the thickness of the transferred material is larger than the average particle diameter of the fine particles, the protruding height of the fine particles falls within the above range for some of the added fine particles. Even at that time, when the surface of the image receiving layer is observed, the number of fine particles protruding under the above conditions should be 10 particles / mm ² or more. The amount of fine particles added is usually 5 m
It is g / m ² or more and 10 g / m ² .

An example of a typical method of using the above-mentioned transferred material will be described with reference to FIG. On the material in which the image forming layer 2 is applied on the support 1, first, as shown in a), the transfer target is placed adjacent to the image forming layer laminated on the support 1, and then, When exposed from the side of the support 1, as shown in b), the image forming layer in the exposed portion is ablated and an image is formed, but this image is transferred to the transfer target side, and the transfer target c ') is peeled off. By doing so, an image c) is formed.

In addition, the second of the transferred material used in the present invention
Is characterized in that the surface roughness of the surface of the transferred body facing the image forming layer has an Ra value of 1.0 to 0.04 μm. If the Ra value does not exceed 0.04 μm, the desired sensitivity of the present invention cannot be obtained. Conversely, if the Ra value exceeds 1.0 μm, the desired resolution of the present invention cannot be obtained. No, the dirt increases.

Examples of the transferred material having the above physical properties include a resin layer having one or more layers, at least one layer of which has voids, a resin layer having an inorganic pigment, and base paper.

-Substrate-Resin layer having voids Examples of the resin layer having voids include synthetic paper (for example, synthetic paper containing polypropylene as a main component). Specifically, each grade of the product name YUPO manufactured by Oji Yuka Kako Co., Ltd. or the product name Peach Coat manufactured by Nisshinbo Co., Ltd.
Or Dia foil W, manufactured by DIAFOIL Hoechst Co., Ltd.
-900E and the like can be preferably used.

Resin Layer Containing Inorganic Pigment In the present invention, it is preferable that the base material made of a resin is stretched into a sheet or film and heat-set from the viewpoint of dimensional stability. Even if the base material has no microvoids, Alternatively, even those with microvoids can be appropriately selected according to the application.

Specifically, Dianal W-410 manufactured by DIAFOIL Hoechst KK can be preferably used.

Base Paper The base paper used in the transfer material of the present invention is preferably pulp paper made from natural pulp, synthetic pulp, or a mixture thereof, among which natural pulp paper containing wood pulp as a main component is preferable. Is preferred. The paper is preferably made using a Fourdrinier paper machine and the like, and for the purpose of improving smoothness, it is preferable to carry out calendering using a machine calendar, a super calender, a heat calender or the like after paper making. Further, a base paper coated with a resin layer containing a pigment for improving smoothness can also be preferably used in the present invention. Specific base papers include high-quality paper, art paper, coated paper, single-glossy paper, impregnated paper, paperboard and the like.

The paper preferably has a Beck smoothness of 50 seconds or more, and more preferably 100 seconds or more, in order to provide smoothness when a polypropylene and polyolefin laminate layer containing white fine particles to be described later is provided. Preferably has a smoothness of 200 seconds or more. The thickness of the paper is not particularly limited, but is preferably 30 to 800 μm, more preferably 50 to 500 μm.

In the above base paper, if necessary, a sizing agent,
Fixing agent, paper strengthening agent, filler, antistatic agent, dye, pigment,
Additives such as a fluorescent whitening agent, an antioxidant, and an antifriction agent may be contained.

The base material is preferably one having a high transparency when transparency is required such as a transparent original such as OHP or a sticker to be adhered to glass, and it is formed in the case of a reflection image. White pigments such as titanium oxide, zinc oxide, silica, barium sulfate, magnesium carbonate, calcium carbonate, talc, clay, etc. may be added to the layer constituting the substrate in order to enhance the sharpness of the image.

The thickness of the substrate is usually 20 to 1,000 μm.
m, preferably 50 to 500 μm, and is appropriately selected from such a range.

The third member of the transferred material used in the present invention is
According to one aspect of the present invention, the transferred material is a polypropylene resin, and the polypropylene resin is a polypropylene resin layer obtained by applying a coating liquid containing a polypropylene resin onto the surface of the transferred material and drying the coating solution.

Further, the fourth member of the transferred material used in the present invention is
In this embodiment, the transferred material is formed on the image forming layer by melt extrusion coating.

As the resin to be formed by the melt extrusion coating, any resin having a small neck-in and a good draw-down property may be used, for example, high density polyethylene, medium density polyethylene, low density polyethylene, Examples thereof include polypropylene, polybutene, polypentene, polystyrene, polyolefin resins such as ethylene-vinyl acetate copolymer, polyester resins such as polyethylene terephthalate, ionomer resins, nylon, polyurethane and the like.

Among these, polyolefin resins are preferable, and particularly high density polyethylene, medium density polyethylene,
It is preferable to use low-density polyethylene, polypropylene, polybutene, polypentene, ethylene-polypropylene copolymer or the like alone or in combination of two or more kinds of resins.

When a polyolefin is used among these resins, the thickness of the resin layer is usually 5 to 50 μm, preferably 10 to 40 μm, and is appropriately selected from such a range. An example of such a laminate layer is mainly composed of polypropylene containing white fine particles having a specific thickness.

This polypropylene has a melt flow rate (test method: ASTM D1238, g / 10 min) of 0.5 to
It is preferably in the range of 15, and more preferably in the range of 1-10. If the drawdown property is good, either a homopolymer or a copolymer may be used, or one or more polypropylenes may be used in combination.

The thickness of the laminate layer in the present invention is usually 5 to 50 μm, preferably 10 to 40 μm, and is appropriately selected from such a range.

Lamination by melt extrusion coating is disclosed in JP-A Nos. 1-263081, 1-271289, and 2-106397.
No. 2-111586, No. 2-305688, No. 3-49991 and the like.

As the white fine particles, both inorganic fine particles and organic fine particles can be used as long as they are excellent in thermal stability during lamination.

Examples of the inorganic fine particles include silica, titanium oxide, aluminum oxide, zinc oxide, magnesium oxide, metal oxides such as aluminum borate, calcium carbonate, magnesium carbonate, barium sulfate, magnesium sulfate, aluminum hydroxide, and water. Metal salts of magnesium oxide, boron nitride, etc., kaolin, clay, talc, zinc white, lead white, sikhlite, quartz, diatomaceous earth,
Examples include pearlite, bentonite, mica, and synthetic mica.

Examples of the organic fine particles include melamine resin particles, guanamine resin particles, styrene-acryl copolymer resin particles, silicone resin particles and fluororesin particles.

Among the white fine particles, hollow resin fine particles are preferable in order to increase the transfer sensitivity or the transfer density, and examples of the hollow fine particles include crosslinked styrene-acrylic hollow resin particles.

When the white fine particles are added, the content in the laminate layer is usually 0.1 to 30% by weight,
Particularly, it is preferable to select it within the range of 1 to 20% by weight.

The average particle size of the white fine particles is usually 0.0
It is 1-2 μm, preferably 0.02-1 μm.

In the laminate layer, in addition to the white fine particles, an antistatic agent, a heat stabilizer, an antioxidant, an ultraviolet absorber, a light stabilizer, and a fluorescent whitening agent which do not decompose at the temperature during lamination. You may mix | blend additives, such as.

In this case, it is preferable that the compounding amount is usually 30% by weight or less, especially 20% by weight or less in the laminate layer forming composition.

In the present invention, when the adhesive strength between the image forming layer and the laminating layer is insufficient, the surface of the image forming layer is laminated before the composition containing polypropylene as a main component is laminated on the image forming layer. Is preferably subjected to a primer treatment.

Examples of the primer include metal alkoxides such as titanium alkoxide and zirconium alkoxide, ethylene-vinyl acetate copolymers, olefin resins such as vinylidene chloride and polybutadiene resins, urethane resins, epoxy resins and polyester resins. Resin, acrylic resin, epoxy resin, polyethyleneimine resin, etc. are mentioned, and further, these resins are heat-cured using a curing agent such as an isocyanate compound, an amine compound, an acid anhydride, or ultraviolet rays. It may be cured using an electron beam such as. Furthermore, the materials described in Chapters 33 to 36 of "New Laminating Manual" edited by Processing Technology Association can be used in the present invention at appropriate times.

As the method for providing the primer layer, a coating method in which the primer layer is applied directly or dissolved in a suitable solvent and applied and dried,
It can be provided by a melt coating method in which the layer-forming component is melted and coated.

Examples of the solvent used in the above coating method include water, alcohols, cellosolves, aromatics, ketones, ester solvents, ethers, chlorine solvents and the like.

For the coating, conventionally known gravure roll coating methods, extrusion coating methods, wire bar coating methods, roll coating methods and the like can be adopted.

The thickness of the primer layer described above is
Usually 0.001 to 2.0 μm, preferably 0.01 to
It is preferable to provide it in the range of 1.0 μm.

<Image Forming Method> The image forming method of the present invention has an image forming layer and a transferred material in this order on a support, and the image forming layer is exposed to high-density energy light to form an image forming layer in an irradiation portion. The binding force between the transfer medium and the transfer target does not substantially change, and the binding force between the support and the image forming layer may be reduced. Further, by separating the transfer target and the support, the image formation in the irradiation part is performed. The layer can be transferred to the transfer target.

In the present invention, an image can be formed by two methods from the constitution of the above-mentioned image forming material, which will be described below in detail according to each image forming method.

—Image Forming Method 1— A support on which the above-mentioned image forming layer is laminated, and an image receiving layer capable of receiving the image forming layer of the irradiation portion on the substrate by high-density energy light, or a transfer-receiving member or self Before the exposure, the supporting transfer material is brought into close contact with each other and the high-density energy light exposure does not substantially change the binding force between the image forming layer and the transfer material at the irradiation portion. And the image forming layer in the irradiation part is transferred to the transfer target by separating the transfer target from the support, thereby forming an image.

In order to obtain a high resolution, the image exposure is performed by an electromagnetic wave whose energy application area can be narrowed down, especially a wavelength of 1 nm.
Ultraviolet rays of 1 mm to 1 mm, visible rays, and infrared rays are preferable, and examples of light sources to which such light energy can be applied include lasers, light emitting diodes, xenon flash lamps,
Halogen lamps, carbon arc lamps, metal halide lamps, tungsten lamps, quartz mercury lamps, high pressure mercury lamps and the like can be mentioned. The energy applied at this time can be appropriately selected by adjusting the exposure distance, time and intensity depending on the type of image forming material.

In case of collectively exposing the above energy,
A mask material in which a negative pattern of a desired exposure image is formed of a light-shielding material may be superimposed and exposed.

When an array type light source such as a light emitting diode array is used, or when a light source such as a halogen lamp, a metal halide lamp or a tungsten lamp is controlled to be exposed by an optical shutter material such as liquid crystal or PLZT, an image signal is used. According to this, it is possible to carry out digital exposure according to the method, and in this case, direct writing can be performed without using a mask material.

However, this method requires a new optical shutter material in addition to the light source. Therefore, it is preferable to use a laser as the light source in digital exposure.

When laser light is used as the light source,
A latent image can be formed by scanning light according to the image data by narrowing the light into a beam. Furthermore, when a laser is used as the light source, the exposure area can be easily narrowed down to a very small size and a high resolution image can be obtained. Can be formed.

The laser light source used in the present invention is a well-known laser such as ruby laser and YAG.
Solid-state lasers such as lasers and glass lasers; He-Ne
Laser, Ar ion laser, Kr ion laser, CO ₂
Laser, CO laser, He-Cd laser, N ₂ laser,
Gas lasers such as excimer lasers; semiconductor lasers such as InGaP lasers, AlGaAs lasers, GaAsP lasers, InGaAs lasers, InAsP lasers, CdSnP ₂ lasers, GaSb lasers; chemical lasers, dye lasers, etc. In order to cause ablation, it is preferable to use a laser in the visible to near infrared region having a wavelength of 600 to 1200 nm from the viewpoint of sensitivity because light energy can be efficiently converted into heat energy.

The high-density light energy is preferably exposed from the support side of the image forming layer.

As the method for peeling off the transferred material, a peeling plate, a method for fixing the peeling angle with a peeling roll, a manual peeling method for peeling off the transferred material and the image forming material without manually fixing the image are used. Various peeling methods can be used as long as they do not affect the formation. Further, after exposure using a transfer material having no tackiness or adhesiveness at room temperature, the image forming layer and the above description are described with the image forming material in which only the image forming layer is laminated on the support, When an intermediate layer is laminated between the support and the image forming layer, the ablation position may be between the intermediate layer and the image forming layer, or between the support and the intermediate layer, and Depending on the situation, the intermediate layer may be partially destroyed by heat.

—Image Forming Method 2— The second method is to use an image forming material in which a transfer-receiving sheet is preliminarily laminated on the above-mentioned colorant layer with a primer layer if necessary, and the image is formed. The forming layer does not substantially change the binding force between the image forming layer and the transferred material in the irradiated portion by exposure to high-density energy light, and the binding force between the support and the image forming layer can be lowered. The image forming layer in the irradiation portion can be transferred to the transfer target by separating the transfer target from the support. As a method of preliminarily laminating, it can be obtained by the above-mentioned extrusion lamination, and by coating and drying the resin binder dispersed or dissolved in water or a solvent.

In this method, the image forming method 1 is also used.
Similarly, the exposure direction of the light energy is preferably from the side of the support, and further, the colorant layer in the image-exposed portion is not destroyed, and only the adhesive force between the support and the colorant layer is reduced or eliminated. Imagewise exposure is preferable because the imagewise exposed portion can be uniformly pulled out to the transfer sheet side.

In common with the above two image methods, the thickness of the transferred sheet is preferably 5 μm to 300 μm, more preferably 10 μm to 100 μm.

[0114]

The present invention will be described in detail below with reference to examples, but the embodiments of the present invention are not limited thereto. In the following, "parts" represents "parts by weight as active ingredients" unless otherwise specified.

Example 1 Image-forming materials 1 to 13 <Image-forming materials> The image-forming materials of the present invention and comparative examples are shown below.
It was prepared using a support, a colorant layer and a transfer sheet. Table 1 shows the prepared image forming material.

-Support-Transparent polyethylene terephthalate film (T-100 manufactured by Diafoyle Hoechst Co., Ltd.) whose surface on which a 25-μm-thick colorant layer is laminated is subjected to corona discharge-Colorant layer-Colorant layer-1 Kneading and dispersing the composition of using an open kneader,
A colorant layer forming coating solution containing a magnetic powder made of a metal was prepared and applied onto a support by extrusion coating, and then a magnetic field orientation treatment was performed while the coating film was undried, followed by drying. Then, the surface is treated with a calendar to a thickness of 1.2.
A μm colorant layer was formed.

Fe-Al based ferromagnetic metal powder (coloring material / metal-containing powder) 100 parts [Fe: Al atomic number ratio = 100: 4 (whole), Fe: Al atomic number ratio = 50: 50 (surface) , Average major axis diameter: 0.14 μm] Potassium sulfonate group-containing vinyl chloride resin 10 parts [Nippon Zeon Co., Ltd., MR-110] Sodium sulfonate group-containing polyurethane resin 10 parts [Toyobo Co., Ltd., UR -8700] α-alumina [average particle size = 0.15 μm] 8 parts Stearic acid 1 part Butyl stearate 1 part Polyisocyanate compound 5 parts [Nippon Polyurethane Industry Co., Ltd., Coronate L] cyclohexanone 100 parts Methyl ethyl ketone 100 parts Toluene 100 Part-Transfer sheet-Polyvinyl alcohol resin (Nippon Gosei Kagaku Co., Ltd. Gohsenol GL05) dissolved in pure water at a concentration of 10% was added to the binder aqueous solution, and the addition amount of fine particles having different average particle diameters was changed. After the ultrasonication treatment, the converted coating liquid was applied to the following support with a wire bar and dried to prepare a transfer sheet as shown in Table 1.

-Fine particles-Soken Chemical Co., Ltd. monodisperse PMMA particles MX-300 (average particle diameter 3.0 μm) Soken Chemical Co., Ltd. monodisperse PMMA particles MX-1500 (average particle diameter 15.0 μm) Toshiba Silicone Silicone resin particles Tospearl 108 (average particle size 0.8μm) Silicone resin particles Tospearl 145 (Average particle size 4.5μm) made by Toshiba Silicone Silicone resin particles Tospearl 3120 (Average particle) made by Toshiba Silicone Co., Ltd. Diameter 12.0 μm) -Support-Transparent polyethylene terephthalate film having a thickness of 100 μm and subjected to corona discharge treatment [Dia foil Hoechst Co., Ltd.
Manufactured by T-100] 1 from the surface of the produced transfer sheet
The number of fine particles protruding by μm or more was counted by counting the number in a 1 cm square area on the transfer sheet with a microscope, and dividing the number by 100 was defined as the number of protruding fine particles per 1 mm ^2. did.

<Image forming method> Semiconductor laser [LT090MD manufactured by Sharp Corporation, dominant wavelength 830]
nm], focus on the surface of the image forming layer, and perform scanning exposure from the side of the support to imagewise expose and reduce the bonding force between the support and the image forming layer in the laser light irradiation part to form an image forming layer. An image was formed by peeling from the transfer-receiving sheet.

The sensitivity and the transmission density (the degree of stain residue) of the formed exposed area were evaluated according to the following criteria. The evaluation results are shown in Table 1.

-Sensitivity- The average exposure amount (E1: unit mJ / cm ^{2) of the} surface of the image forming material on which image formation is performed by performing solid scanning exposure so as to form an image of 0.5 mm × 0.5 mm with a beam diameter of 4 μm ) Was evaluated in four levels.

◎ ... E ≦ 250 ○ ... 250 <E ≦ 400 △ ... 400 <E ≦ 600 × ... 600 <E-Transmission Density-The Vis light transmission density of the ablated portion of the image forming material is Xrite manufactured by Xrite. Was used to measure the transmission density.

A: 0.03 or less (extremely good) O: 0.04 to 0.05 (to the extent that a fine colorant layer scattering powder, which is practically no problem, can be confirmed with a microscope) Δ: 0.06 to 0.09 (transfer unevenness can be confirmed with a loupe) × ... 0.10 or more (transfer unevenness can be visually confirmed)

[0124]

[Table 1]

From Table 1, it can be seen that the samples of the present invention show excellent effects in sensitivity (exposure energy) and transmission density (dirt OD).

Example 2 Transferred Sheets 14 and 15 Evaluations were made in the same manner except that the composition of the colorant layer for the transferred sheet 5 used in Example 1 was changed to the following, and the results are shown in Table 2.

Colorant Layer-2: Transfer Sheet 14 The following composition is kneaded and dispersed using an open kneader,
A colorant layer forming coating solution containing a magnetic powder made of a metal was prepared and applied onto a support by extrusion coating, and then a magnetic field orientation treatment was performed while the coating film was undried, followed by drying. After that, surface treatment is performed with a calendar to a thickness of 1.0 μm
The colorant layer of was formed.

Fe-Al ferromagnetic metal powder (metal-containing powder) 90 parts [Fe: Al atomic number ratio = 100: 6 (whole), Fe: Al atomic number ratio = 50: 90 (surface), average length Shaft diameter: 0.15 μm] Potassium sulfonate group-containing vinyl chloride resin 10 parts [Nippon Zeon Co., Ltd., MR-110] Sodium sulfonate group-containing polyurethane resin 10 parts [Toyobo Co., Ltd., UR-8700] α-alumina [average particle size = 0.15 μm] 8 parts Carbon black [average particle size = 0.04 μm] 10 parts Stearic acid 1 part Butyl stearate 1 part Polyisocyanate compound 5 parts [Nippon Polyurethane Industry Co., Coronate L] ] Cyclohexanone 100 parts Methyl ethyl ketone 100 parts Toluene 100 parts Colorant layer-2: Transferred sheet 15 The following composition is kneaded and dispersed using an open kneader,
A colorant layer forming coating solution containing a magnetic powder made of a metal was prepared and applied onto a support by extrusion coating, and then a magnetic field orientation treatment was performed while the coating film was undried, followed by drying. After that, surface treatment is performed with a calendar to a thickness of 1.0 μm
The colorant layer of was formed.

[0129]   Vinyl chloride resin containing potassium sulfonate group 10 parts [Nippon Zeon Co., Ltd., MR-110]   Polyurethane resin containing sodium sulfonate group 10 parts [Toyobo Co., Ltd., UR-8700]   α-alumina [average particle size = 0.15 μm] 8 parts   Carbon black [average particle size = 0.04 μm] 100 parts   Stearic acid 1 part   Butyl stearate 1 part   Polyisocyanate compound 5 parts [Nippon Polyurethane Industry Co., Ltd., Coronate L]   Cyclohexanone 100 parts   100 parts of methyl ethyl ketone   100 parts of toluene

[0130]

[Table 2]

It can be seen from Table 2 that the samples of the present invention exhibit excellent effects in sensitivity (exposure energy) and transmission density (dirt OD) even when the colorant layer composition changes.

Example 3 Transferred Sheets 16 to 19 Thickness of transparent polyethylene terephthalate film having a colorant layer for the transferred sheet 13 used in Example 1
Evaluations were made in the same manner except that 25 μm was changed to 50 μm, 75 μm and 100 μm. The results are shown in Table 3, which shows excellent effects regardless of the thickness of the support having the colorant layer.

[0133]

[Table 3]

[0134] Example 4 to sandblasting the one surface of the corona discharge treated transparent polyethylene terephthalate film having a thickness of 100μm was used in the transfer sheet 20 to 25 Example 1 [Diafoil Hoechst Co., T-100] The surface was roughened by the method described above, and the surface roughness was changed to obtain a transfer sheet. The results are shown in Table 4.
It was shown to.

(The transfer sheet 20 is a polyethylene terephthalate film before being subjected to a surface roughening treatment.) The surface roughness was measured with a surface roughness measuring device Surfcoder SEF-30D manufactured by Kosaka Laboratory Ltd. Used, the surface roughness is 20000 times the vertical magnification, roughness cut-off value 0.08mm, standard length 2.50m
The center line average roughness (Ra) was measured and determined at m and a feed rate of 0.1 mm / sec. The resolution was evaluated as follows.

-Resolution- Scanning exposure was evaluated by the number (N) of resolvable lines per mm when an image was formed with a beam diameter of 6 µm and a scanning pitch of 6 µm with an average exposure amount on the surface of the image forming material.

[0137] ◎… 80 <N ○… 40 ≦ N ≦ 80 △… 20 ≦ N <40 × ... N <20

[0138]

[Table 4]

From Table 4, it can be seen that the samples of the present invention show excellent effects in sensitivity (exposure energy), transmission density (dirt OD) and resolution.

Example 5 Transfer Target Sheets 26 to 38 Evaluations were made in the same manner except that the transfer target sheet used in Example 1 was changed to the following film. The results are shown in Table 5.

Transfer sheet 26 Polypropylene resin synthetic paper (Yupo FPG # 60, manufactured by Oji Yuka Synthetic Paper Co., Ltd., thickness: 60 μm) Transfer sheet 27 Polypropylene resin synthetic paper (Yupo TPG, manufactured by Oji Yuka Synthetic Paper Co., Ltd.) # 75, thickness 75 μm) Transfer sheet 28 Polypropylene resin synthetic paper (Yupo SGG # 110, manufactured by Oji Yuka Synthetic Paper Co., Ltd., thickness 110 μ)
m) Transferred sheet 29 White polyethylene terephthalate film having voids (manufactured by Diafoil Hoechst Co., Ltd.,
W900E, thickness 75 μm) Transfer sheet 30 Transparent polyethylene terephthalate film (manufactured by Diafoyhext Co., Ltd., T100, thickness 75 μm) Transfer sheet 31 Resin coated paper with base paper thickness 150 μm, Bekk smoothness 100 on both sides The following composition is melted on a high-quality paper for 2 seconds, kneaded sufficiently, and then hot-melt extrusion laminated to a thickness of 10 to 50 μm on the base material, and the laminated layer is formed on the base material. Formed.

Low density polyethylene containing 10 parts of titanium oxide having an average particle diameter of 0.3 μm and having a density of 0.91 g / cm ³ and a melt flow rate of 7.0 g / 10 min.

Transferred sheet 32 White polyethylene terephthalate film having voids (manufactured by Diafoyle Hoechst Co., Ltd., W410, thickness 100 μm) Transferred sheet 33 Transparent acrylic film having a thickness of 100 μm (Acryplen HBS001 manufactured by Mitsubishi Rayon Co., Ltd.) Transferred Sheet 34 The composition shown below was sufficiently stirred and mixed, and this mixture was sufficiently kneaded with a biaxial kneader to obtain a composition, which was then granulated by a conventional method. This composition was melted and a polypropylene resin layer was laminated on the colorant layer of Example 1 in a thickness of 50 μm using a 65Φ inflation extruder.

Polypropylene resin (UBE Polypro J120G, manufactured by Ube Industries, Ltd.) 300 parts Calcium carbonate (average particle size 2 μm, treated with fatty acid) 40 parts Stearic acid 5 parts Transferred sheet 35 For comparison, the above polypropylene resin is a low density polyethylene resin ( Melt flow rate 7, ASTM D123
It was made in the same manner except that it was changed to 8).

Transferred sheet 36 The surface of the colorant layer of the image forming material was used as a transferred sheet, and the adhesive layer surface of the adhesive tape [Scotch No. 845 Book Tape manufactured by 3M Co., Ltd.] was faced to prevent transfer of air bubbles. Pressure treatment [pressure roll, conveying speed; 30 mm / sec, pressure 3.0 kg / c
m], and the same evaluation was performed except that they were adhered.

Transferred Sheet 37 An image forming material was prepared by coating a transferable sheet coating solution having the following composition in a thickness of 5 μm on the colorant layer of Example 1 with a wire bar and drying. After subjecting this image-forming material to the same exposure as in Example 1, the polypropylene resin layer laminated by coating was peeled at a peeling angle of 180 ° at a speed of 30 mm / sec.

Polypropylene resin emulsion (25% water dispersion) (Toho Kagaku KK Hitec E-7304) 60 parts Polyethylene resin emulsion (25% water dispersion) (Toho Kagaku HITEC S-3125) 40 parts Transferred sheet 38 The same thing was evaluated except that the coating liquid of the transferred sheet 37 was changed to the following composition.

Polyethylene resin emulsion (25% aqueous dispersion) (High Tech S-3125 manufactured by Toho Kagaku Co., Ltd.) 100 parts or more The transfer sheets 26 to 38 evaluated are shown in Table 5.
It was shown to.

[0149]

[Table 5]

From Table 5, it can be seen that the transferred sheet of the present invention exhibits excellent effects.

[0151]

According to the present invention, it is possible to provide an image forming material having high sensitivity, no stain, and high resolution images, and an image forming method using the same.

[Brief description of drawings]

FIG. 1 is a schematic view of an image forming material of the present invention.

FIG. 2 is a cross-sectional view of a transfer sheet according to the present invention.

FIG. 3 is a diagram showing an image forming method of the present invention.

[Explanation of symbols]

1 Support for colorant layer 2 Colorant layer 3 Transfer sheet support 4 Fine particle-containing layer 5 Polypropylene layer provided on the support 6 Self-supporting polypropylene layer 7 Fine particles protruding over 1 μm 8 Fine particles not protruding over 1 μm

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ identification code FI G03F 7/34 B41M 5/26 B H (56) References JP-A-5-278336 (JP, A) JP-A-6-79980 (JP, A) JP-A-6-115265 (JP, A) JP-A-4-161384 (JP, A) JP-A-4-212889 (JP, A) JP-A-6-286350 (JP, A) Kai 63-137892 (JP, A) JP 4-368884 (JP, A) JP 55-117687 (JP, A) JP 62-132683 (JP, A) JP 53-111719 ( JP, A) JP 8-334894 (JP, A) JP 9-15849 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B41M 5 / 38-5 / 40 G03F 7/004 524 G03F 7/34

Claims (7)

(57) [Claims] 1. An image forming layer and a transferred material are provided in this order on a support, and the image forming layer causes ablation by exposure to high-density energy light, and the image forming layer and the transferred material in the irradiation portion. The binding force between the support and the image-forming layer can be lowered, and the image-forming layer in the irradiated portion can be separated by separating the transfer-receiving body from the support. image forming material is one that can be transferred to,
The image forming layer contains a ferromagnetic metal powder, and the transferred body contains fine particles, and a part of the fine particles protrudes from the surface of the transferred body and protrudes from the surface of the transferred body. Fine particles with a height of 1 μm or more and 20 μm or less are 1 mm
An image forming material characterized in that there are 10 or more per ² parts. 2. An image forming layer and a transferred material are provided in this order on a support, and the image forming layer undergoes ablation by exposure to high-density energy light, and the image forming layer at the irradiated portion and the transferred material. The binding force between the support and the image-forming layer can be lowered, and the image-forming layer in the irradiated portion can be separated by separating the transfer-receiving body from the support. image forming material is one that can be transferred to,
The image forming layer contains a ferromagnetic metal powder, and the surface roughness of the surface of the transferred body facing the image forming layer has an Ra value of 1.0.
An image forming material having a thickness of about 0.04 μm. 3. An image forming layer and a transfer-receiving material are formed on a support.
In order, the image forming layer is exposed to high-density energy light
More ablation, and the image forming layer of the irradiated part
The binding force between the substrate and the transfer target does not change substantially, and
The binding force with the image forming layer may be reduced, and
The image forming layer of the irradiation part is separated by separating the image carrier and the support.
Of the image-forming material, which can be transferred to a transfer target,
The image forming layer contains a ferromagnetic metal powder, and
Image <br/> imaging element body characterized by containing a polyolefin resin. 4. The polyolefin resin of the transferred material is
It is a polypropylene resin, It is characterized by the above-mentioned.
Image-forming material. Wherein including the transfer object is polypropylene resin
The applied coating liquid is applied to the surface of or above the support that supports the transfer target.
Polypropylene obtained by coating on the surface of the image forming layer and drying.
The image forming material according to claim 3 or 4, wherein Rukoto that having a lens resin layer. 6. An image forming layer and a transferred material are provided in this order on a support, and the image forming layer undergoes ablation by exposure to high-density energy light, and the image forming layer at the irradiated portion and the transferred material. The binding force between the support and the image-forming layer can be lowered, and the image-forming layer in the irradiated portion can be separated by separating the transfer-receiving body from the support. Of the image-forming material that can be transferred to
The image forming layer contains a ferromagnetic metal powder, and the transferred material has a resin layer having voids formed by melt extrusion coating , or is formed by melt extrusion coating.
An image forming material, which is a resin layer having a formed inorganic pigment. 7. The image according to any one of claims 1 to 6.
Imagewise expose the image-forming material with high-density energy light
Ablation, image support and support of exposed area
Decreases the bond strength with the layer and separates the transferred material from the support
By doing so, the image forming layer in the exposed area is not transferred onto the transfer target.
An image-forming method, comprising the this <br/> to form an image while leaving the image-forming layer in the exposed portion to the support.