JP2000081699A - Medical dry film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To permit the easy observation of an exact image by recording the image on one surface of a base and providing the opposite side thereof with an antireflection film, thereby making the image observation from the rear surface easy and lessening reflection without degrading transmittability. SOLUTION: The image 3 is recorded in the receiving layer 2a on the one surface of the base of the medical dry film 1 and the opposite side thereof is provided with the antireflection film 4. The image 3 is recorded by ink which is solid at ordinary temp. The image is observed from the rear surface having the antireflection film 4 of the base 2 recording the image 3 by this ink. The reflectivity on the base 2 surface not recorded with the image 3 is below 4% in a range where the wavelength width of the reflected light is min. 100 nm. The image 3 is recorded on the one surface of the base 2 of the medical dry film 1 and the opposite side thereof is provided with the antireflection film 4 in such a manner. The effect of preventing the reflection is imparted by this antireflection film 4, by which the image observation from the rear side is made easy. In addition, the reflection is lessened and the easy and exact observation is made possible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical dry film for recording a medical image on a support.

[0002]

2. Description of the Related Art Medical dry films include, for example, chest X-ray diagnostic images, X-ray mammography, X-ray CT and MR.
It is used as a slice image recording medium such as I. In this medical dry film, an image is recorded on one surface of a support, and transmitted through the opposite side to observe the image to perform a detailed inspection or medical examination.

[0003]

As described above, in a medical dry film, when a transmission image having excellent sharpness is recorded, for example, when an image is recorded on both sides of a support, the image is likely to be misaligned. It is necessary to record the image in

In this case, when the image recorded on the medical dry film is observed from the back side of the image so that the image is not stained or damaged, the transparent support of the polymer material is smooth,
The reflected light interferes with the observation of the image.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and provides an effect of preventing reflection on a back surface on which an image of a support is recorded, thereby facilitating image observation from the back surface, and also having transparency. It is an object of the present invention to provide a medical dry film capable of easily and accurately observing an image by reducing reflection without lowering the image quality.

[0006]

Means for Solving the Problems In order to solve the above problems and achieve the object, the present invention has the following constitution.

According to a first aspect of the present invention, there is provided a medical dry film for recording an image on a support, wherein the image is recorded on one surface of the support and an antireflection film is provided on the opposite side. Medical dry film. ].

According to the first aspect of the present invention, an image is recorded on one surface of the support, and an antireflection film is provided on the other side of the image. By imparting the effect of preventing reflection, image observation from the back surface is facilitated, and reflection is reduced without lowering transmittance, so that easy and accurate image observation is possible.

According to a second aspect of the present invention, there is provided an image forming apparatus, wherein the image is recorded with an ink which is solid at normal temperature, and the image is observed from the back surface of the support on which the image is recorded, having an antireflection film. The medical dry film according to claim 1, wherein: ].

According to the second aspect of the present invention, the image is recorded with an ink which is solid at room temperature, and the image is observed from the back surface of the support having the anti-reflection film on which the image has been recorded with this ink. Is reduced, and easy and accurate image observation is possible.

[0011] The invention according to claim 3 is characterized in that "anti-glare properties are imparted by dispersing synthetic resin particles and / or inorganic particulate materials in a polymer binder on the surface of the support on which the image is not recorded. The medical dry film according to claim 1 or 2. ].

According to the third aspect of the present invention, the synthetic resin particles and / or the inorganic particulate material are dispersed in a polymer binder on the surface of the support on which no image is recorded to impart an antiglare property, thereby allowing transmission. The reflection is reduced without deteriorating the performance, and easy and accurate image observation is possible.

According to a fourth aspect of the present invention, there is provided a method comprising the steps of: dispersing a synthetic resin particle and / or an inorganic particulate material in a binder on both surfaces of the support and applying the dispersed material; The medical dry film according to claim 2, wherein: ].

According to the fourth aspect of the present invention, synthetic resin particles and / or inorganic particulate material are dispersed in a binder and applied to both sides of the support, and an image is recorded on one side with an ink which is solid at room temperature. Thereby, reflection can be reduced without lowering the transmittance, and easy and accurate image observation can be performed.

According to a fifth aspect of the present invention, there is provided a medical dry film according to the first or second aspect, wherein two or more layers having different refractive indices are laminated on the surface of the support on which the image is not recorded. . ].

According to the fifth aspect of the present invention, two or more layers having different refractive indices are laminated on the surface of the support on which an image is not recorded. The interference can reduce the reflected light, and the reflection can be reduced without lowering the transmittance, so that easy and accurate image observation is possible.

According to a sixth aspect of the present invention, there is provided the method according to the first aspect, wherein the reflectance on the surface of the support on which the image is not recorded is 4% or less when the wavelength width of the reflected light is at least 100 nm. A medical dry film according to any one of claims 5 to 5. ].

According to the sixth aspect of the present invention, the reflectance on the surface of the support on which no image is recorded is 4% or less when the wavelength width of the reflected light is at least 100 nm and the transmittance is reduced. The reflection is reduced, and easy and accurate image observation is possible.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the medical dry film of the present invention will be described with reference to the drawings, but the present invention is not limited to these embodiments.

FIG. 1 is a sectional view showing the structure of a medical dry film. The medical dry film 1 has an image 3 recorded on a receiving layer 2 a on one surface of a support 2, and has an antireflection film 4 on the opposite side. The image 3 is recorded with an ink that is solid at normal temperature, and the image is observed from the back surface of the support 2 having the antireflection film 4 on which the image 3 is recorded with the ink.
The reflectance on the surface of the support on which the image 3 is not recorded is 4% or less when the wavelength width of reflected light is at least 100 nm.

As described above, the medical dry film 1 has the image 3 recorded on one surface of the support 2 and has the anti-reflection film 4 on the opposite side, and the anti-reflection film 4 functions to prevent reflection. The image observation from the back surface is easy by giving. Further, the reflection is reduced by the anti-reflection film 4 without lowering the transmittance, so that the image 3 can be easily and accurately observed. Further, the reflectance on the surface of the support on which the image 3 is not recorded is 4% or less when the wavelength width of the reflected light is at least 100 nm, and the reflection is reduced without lowering the transmittance, so that the reflectance is easy and accurate. Observation of the image is possible.

As the support and the receiving layer of the medical dry film 1 of the present invention, those described in JP-A-10-76751 are preferably used. The receiving layer is formed of a receiving layer having a coating amount of 1 to 30 mg / dm ² applied on a support.

A preferred support is a polyester obtained from the polycondensation of a diol and a dicarboxylic acid. Preferred dicarboxylic acids include terephthalic acid, isophthalic acid, phthalic acid, naphthalenedicarboxylic acid, adipic acid and sebacic acid. Preferred diols include ethylene glycol, trimethylene glycol, tetramethylene glycol and cyclohexane dimethanol. Specific polyesters suitable for use in the present invention are polyethylene terephthalate, polyethylene-p-hydroxybenzoate, poly-1,4-cyclohexylene dimethylene terephthalate, and polyethylene 2,6-naphthalene carboxylate. Polyethylene terephthalate has excellent water resistance, chemical stability and durability,
It is the most preferred polyester for the support.

The support layer is formed by coating a receiving layer, and the receiving layer coated on the support is a binder composed of a water-soluble polymer and a water-insoluble polymer. The combined amount of the water-soluble polymer and the water-insoluble polymer is at least 15% by weight and not more than 90% by weight of the water-insoluble polymer; and the hydrodynamic diameter in water not more than 0.3 μm. Wherein the inorganic particulate material represents at least 50% by weight and not more than 95% by weight of the total applied amount of the water-soluble polymer, the water-insoluble polymer and the inorganic particulate material.

The water-soluble polymer is preferably polyvinyl alcohol, polyacrylamide, methylcellulose,
It contains at least one compound selected from the group consisting of polyvinylpyrrolidone and gelatin. The water-soluble polymer further preferably comprises a polymer of a monomer selected from the group consisting of vinyl alcohol, acrylamide and vinylpyrrolidone.

The water-insoluble polymer is preferably acrylic,
It contains at least one polymerized monomer selected from olefin, vinyl, urethane and amide. The water-insoluble polymer most preferably contains at least one compound selected from acrylic, urethane, polyolefin and vinyl latex. The water-insoluble polymer can include polar functional groups. However, the extent is below a level sufficient to form a water-soluble polymer.

The total coating amount of the inorganic particulate material, the water-soluble polymer and the water-insoluble polymer is preferably at least 1 m
g / dm ² . At a total application amount of 1 mg / dm ² or less,
The adhesion between the phase change ink and the receiving layer is reduced to a level that is impractical. Further, the coating efficiency is 1 mg / dm ²
In the following, it decreases, which is not preferable for the production cost of the medium. The total coating amount of the inorganic particulate material, the water-soluble polymer and the water-insoluble polymer is at least 3 mg / dm.
More preferably, it is ² .

The image of the present invention is recorded on a receiving layer of a support with an ink which is solid at room temperature. The ink remains in a solid phase at room temperature and is partially characterized by its property of becoming a liquid phase at elevated temperatures in the printhead. The ink is heated to the liquid phase and droplets of the liquid ink are ejected from the printhead. As the ink droplets touch the surface of the print media, they solidify quickly to form a pattern of solid ink droplets. This process is known as direct inkjet printing. In another device, droplets of liquid ink are conveyed to a heated drum that is maintained at a temperature just below the melting point of the phase change ink. This patterned ink is then transferred from the drum under pressure to the media in rubbery form. This process is known as indirect printing.

The antireflection film 4 of the medical dry film 1
Can be configured as shown in the embodiment of FIGS. In the medical dry film 1 according to the embodiment shown in FIG. 2, the anti-reflection film 4 of the medical dry film 1 has a structure in which the synthetic resin particles 5 and / or
Alternatively, it is constituted by dispersing an inorganic particulate material in a polymer binder 6 to impart antiglare properties. Also, the synthetic resin particles 5 and / or the inorganic particulate material are dispersed and applied to the binder 6 on both surfaces of the support 2, and an image is recorded on one surface of the support 2 with an ink that is solid at room temperature, thereby lowering the transmittance. The reflection is reduced without any difficulty, and the image 3 can be easily and accurately observed.

The antireflection film of the present invention is disclosed in JP-A-8-30.
Those described in JP-A-9910 are preferably used. The antireflection film preferably used is one in which the thickness of the polymer binder portion is in the range of 50 to 90% of the average particle size of the synthetic resin particles. In particular, when acrylic resin particles are used as the synthetic resin particles, a film having no surface reflection and high transmittance can be obtained.

The anti-reflection film plays a role in providing contradictory properties such as anti-glare property and transmissivity.
Such an antireflection film can be formed of a polymer binder and a synthetic resin particle mainly composed of a thermosetting resin or an ionizing radiation-curable resin. Among them, it is preferable to use an ionizing radiation-curable resin from the viewpoint of work environment and productivity. The ionizing radiation-curable resin is formed from a paint containing at least a resin that is cured by irradiation with an electron beam or ultraviolet rays. Specifically, it contains a photopolymerizable prepolymer, a photopolymerizable monomer, and a photopolymerization initiator, and further contains a sensitizer, a non-reactive resin, an additive such as a leveling agent, and a solvent as necessary. It is.

The structure and molecular weight of the photopolymerizable prepolymer are related to the curing of the ionizing radiation-curable coating material, and determine the properties of the ionizing radiation-curable resin such as adhesiveness, hardness and crack resistance. The photopolymerizable prepolymer undergoes radical polymerization when the acryloyl group introduced into the skeleton is irradiated with ionizing radiation.

As the photopolymerizable prepolymer, an acrylic prepolymer having an acryloyl group is particularly preferable, and a prepolymer having two or more acryloyl groups in one molecule and having a three-dimensional network structure. As the acrylic prepolymer, urethane acrylate, epoxy acrylate, melamine acrylate, polyester acrylate and the like can be used.

The photopolymerizable monomer is used for diluting a high-viscosity photopolymerizable prepolymer, lowering the viscosity and improving workability, and for imparting coating strength as a crosslinking agent. . As the photopolymerizable monomer, monofunctional acrylic monomers such as 2-ethylhexyl acrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, butoxyethyl acrylate,
Bifunctional acrylic monomers such as 1,6-hexadiol acrylate, neopentyl glycol diacrylate, hydroxypapyrophosphate neopentyl glycol acrylate, dipentaerythritol hexaacrylate, trimethylpropane triacrylate, pentaerythritol triacrylate One or more kinds of polyfunctional acrylic monomers such as the above are used.

The photopolymerization initiator is used for initiating the reaction of the acryloyl group in a short time by irradiation with ionizing radiation and promoting the reaction, and has no catalytic action. The photopolymerization initiator is required particularly when curing is performed by ultraviolet irradiation, and may not be required when irradiating a high energy electron beam. To harden the ionizing radiation-curable coating, it is irradiated with an electron beam or ultraviolet rays.

The synthetic resin particles used in the present invention include:
Acrylic resin particles, silicone resin particles, nylon resin particles, styrene resin particles, polyethylene resin particles, benzoguanamine resin particles, urethane resin particles, and the like.

The shape of the synthetic resin particles is preferably spherical or nearly spherical, more preferably classified. By using the classified spherical synthetic resin particles, more uniform irregularities can be obtained on the surface of the antireflection film.

In the present invention, the thickness of the polymer binder portion in the antireflection film is adjusted to be in the range of 50 to 90%, preferably 60 to 80% of the average particle size of the synthetic resin particles. is necessary. If the thickness is less than 50%, the synthetic resin particles are likely to be dropped, and the strength of the coating film is reduced. If the thickness is more than 90%, the synthetic resin particles are buried in the coating film, so that sufficient antiglare property can be obtained. Because you can't.

The average particle size of the synthetic resin particles is 0.5 to 10
Those having a range of μm, preferably those having a range of 2 to 8 μm, more preferably those having a range of 4 to 6 μm can be used. When the thickness is smaller than 0.5 μm, the formed antireflection film surface is not sufficiently provided with irregularities, so that the antiglare performance cannot be sufficiently exhibited. When the thickness is larger than 10 μm, the ratio of synthetic resin particles in the antireflection film , And the binding ability of the polymer binder to the synthetic resin particles is reduced, and the strength of the coating film is reduced.

The amount of the synthetic resin particles to be added is in the range of 0.3 to 5% by weight of the solid resin, preferably in the range of 0.5 to 4% by weight. If the amount is less than 0.3% by weight, sufficient anti-glare properties cannot be obtained, and if it exceeds 5% by weight, the haze increases and the transmittance deteriorates.

In order to form an antireflection film having such a composition, when an ionizing radiation-curable resin is used, an ionizing radiation-curable resin paint containing synthetic resin particles is applied to a support, and an electron beam or an ultraviolet ray is used. Is formed by irradiation.

The antireflection film of the present invention is also preferably a film in which an inorganic particulate material having a rheological diameter in water of not more than 0.3 μm, such as silica, is dispersed in a binder comprising a water-soluble polymer and a water-insoluble polymer. Used. The combined amount of the water-soluble polymer and the water-insoluble polymer is such that the water-soluble polymer is at least 15% by weight and 90%.
% By weight. The inorganic particulate material comprises at least 50% by weight of the total applied amount of the water-soluble polymer, the water-insoluble polymer and the inorganic particulate material and 90%.
Indicate no more than% by weight.

The water-soluble polymer is preferably polyvinyl alcohol, polyacrylamide, methylcellulose,
It contains at least one compound selected from the group consisting of polyvinylpyrrolidone and gelatin. The water-soluble polymer further preferably comprises a polymer of a monomer selected from the group consisting of vinyl alcohol, acrylamide and vinylpyrrolidone.

The water-insoluble polymer is preferably acrylic,
It contains at least one polymerized monomer selected from olefin, vinyl, urethane and amide. The water-insoluble polymer most preferably contains at least one compound selected from acrylic, urethane, polyolefin and vinyl latex. The water-insoluble polymer can include polar functional groups. However, the extent is below a level sufficient to form a water-soluble polymer.

The total coating amount of the inorganic particulate material, the water-soluble polymer and the water-insoluble polymer is preferably at least 1 m
g / dm ² . At a total application amount of 1 mg / dm ² or less,
The adhesion between the phase change ink and the receiving layer is reduced to a level that is impractical. Further, the coating efficiency is 1 mg / dm ²
In the following, it decreases, which is not preferable for the production cost of the medium. The total coating amount of the inorganic particulate material, the water-soluble polymer and the water-insoluble polymer is at least 3 mg / dm.
More preferably, it is ² .

The antireflection film of the present invention is also preferably a film in which an inorganic particulate material having a rheological diameter in water of not more than 0.3 μm, for example, silica is dispersed in a binder comprising a water-soluble polymer and a water-insoluble polymer. Used. The combined amount of the water-soluble polymer and the water-insoluble polymer is such that the water-soluble polymer is at least 15% by weight and 90%.
% By weight. The inorganic particulate material comprises at least 50% by weight of the total applied amount of the water-soluble polymer, the water-insoluble polymer and the inorganic particulate material and 90%.
Indicate no more than% by weight.

In the medical dry film 1 of the embodiment shown in FIG. 3, the antireflection film 4 is constituted by laminating two or more layers having different refractive indexes on the surface of the support on which no image is recorded.
3 (a) to 3 (c). The antireflection film 4 in the embodiment of FIG. 3A is an example in which a high refractive index layer 7 and a low refractive index layer 8 are laminated, and an adhesive layer or a primer layer 9 which is laminated as necessary is provided. Can be. The antireflection film 4 in the embodiment of FIG. 3B is an example in which the function is separated into a middle refractive index layer 11 and a high refractive index layer 10 formed thereon. The antireflection film 4 of the embodiment of FIG. 3C has the same structure as that of the embodiment of FIG. This is an example in which is added.

In the embodiment shown in FIG. 3A, the high refractive index layer is formed of a thermosetting resin or an ionizing radiation curable resin. However, since the medical dry film is made of a thermoplastic resin, a high temperature is required during curing. It is preferable to use an ionizing radiation-curable resin that is not required. In the present invention, the terms “high refractive index”, “medium refractive index”, and “low refractive index” refer to the relative refractive index of adjacent layers.

The ionizing radiation-curable resin suitable for forming layers having different refractive indices is preferably one having an acrylate-based functional group, for example, a polyester resin, polyether resin or acrylic resin having a relatively low molecular weight. (Meth) of polyfunctional compounds such as epoxy resin, urethane resin, alkyd resin, spiro acetal comb, polyptadiene resin, polythiol polyene resin, polyhydric alcohol
Oligomers or prepolymers such as acrylates, and monofunctional monomers such as ethyl (meth) acrylate, ethylhexyl (meth) acrylate, styrene, methylstyrene, N-vinylpyrrolidone and the like as reactive diluents, and polyfunctional monomers such as trimethylol Propane tri (meth) acrylate, hexanediol (meth) acrylate, tripropylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, pentaerythritol tri (meth) acrylate,
Dipentaerythritol hexa (meth) acrylate,
Those containing relatively large amounts of 1,6-hexanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate and the like can be used.

Further, in the present invention, a reactive organic silicon compound having a molecular weight of 5,000 or less can be used alone or as a mixture with the above-mentioned curable resin as a curable resin for forming layers having different refractive indexes. The refractive index of the layer having a different refractive index is usually about 1.49 to 1.51, but in order to further improve the refractive index, a high refractive index metal is contained in the resin composition for forming a layer having a different refractive index. And ultrafine particles of metal oxides. The preferred refractive index of the layers having different refractive indexes is 1.50 to 2.20. As a material having a high refractive index, for example, ZnO (refractive index: 1.90), TiO ₂
(Refractive index: 2.3 to 2.7), CeO ₂ (refractive index: 1.9)
5), Sb ₂ O ₅ (refractive index 1.71), SnO ₂ , ITO
(Refractive index 1.95), Y ₂ O ₃ (refractive index 1.87), La
₂ O ₃ (refractive index 1.95), ZrO ₂ (refractive index 2.0
5) and fine powders such as A1 ₂ O ₃ (refractive index 1.63).

For curing the layers having different refractive indices, an ordinary method of curing an ionizing radiation-curable resin, that is, a method of curing by irradiation with an electron beam or ultraviolet rays can be used. For example, in the case of electron beam curing, Cockloft-Walton type,
50 to 100 OKeV, preferably 10 to 100, emitted from various electron beam accelerators such as a bandeograph type, a resonance transformer type, an insulating core transformer type, a linear type, a dynamitron type and a Takazono Watari type.
An electron beam having an energy of 0 to 30 OKeV is used. In the case of ultraviolet curing, ultraviolet rays emitted from light beams such as an ultrahigh-pressure mercury lamp, a high-pressure mercury lamp, a low-pressure mercury lamp, a carbon arc, a xenon arc, and a metal halide lamp can be used.

When using an anti-reflection film in which synthetic resin particles are dispersed in a polymer binder or an anti-reflection film in which an inorganic particulate material is dispersed in a binder made of a polymer, coating as an image receiving film on the back surface of the anti-reflection film. Can also.

On the surface of the high refractive index layer, a low refractive index layer made of a SiO ₂ gel film having a refractive index of 1.44 or less is formed from a sol solution containing a SiO ₂ sol and a reactive organic silicon compound in a liquid medium. Thereby, the medical dry film of the present invention is obtained. The SiO ₂ sol can be prepared by dissolving a silicon alkoxide in an organic solvent suitable for coating and adding a certain amount of water to carry out hydrolysis.

The embodiment shown in FIG. 3B is different from the embodiment shown in FIG.
This is an example in which functions are separated into a high refractive index layer 10 formed thereon and a material used in this example, a method of forming each layer, and the like are the same as those in the embodiment of FIG.
In the embodiment of FIG. 3B, the medical dry film 1 is
Compared with the medical dry film 1 shown in the embodiment of FIG. That is, as compared with the medical dry film shown in the embodiment of FIG.
The embodiments described above have a low minimum reflectance in the visible light region and a large antireflection effect. In the medical dry film shown in the embodiment of FIG. 3B, it is preferable that the thickness of the high refractive index layer is the optical thickness. Here, the optical film thickness refers to a film thickness that is designed such that the refractive index is adjusted and the minimum reflectance is around 550 nm.

The example shown in the embodiment of FIG. 3 (c) is one in which the surface of a medical dry film is provided with fine irregularities so that the medical dry film has a fender. The method for forming the fine unevenness may be any known method.For example, as a preferred method, when the high refractive index hard coat layer is formed by the transfer method, the fine unevenness is formed on the surface as a base film of the transfer material. Using a mat film having a shape, a coating liquid for a high refractive index hard coat layer is applied and cured on the film, and then the hard coat layer is coated on the transparent substrate film surface with an adhesive or the like as necessary. And imparting a fine uneven shape to the surface of the high refractive index hard coat layer. As another method, a coating liquid for a high refractive index hard coat layer is applied to the base film surface and dried, and in this state, the mat film is pressed against the surface of the resin layer, and the resin layer is cured in that state. Then, the mat film is peeled off, and the fine irregularities of the mat film are transferred to the surface of the high refractive index hard coat layer. In any case, since the low-refractive-index layer formed on the surface of the high-refractive-index layer having such fine unevenness is a thin film, the fine unevenness described above appears on the surface of the low-refractive-index layer.

Next, examples of the medical dry film will be described. [Example 1] Preparation of coating liquid: polyvinyl alcohol: acrylic acid /
Vinylpyrrolidone copolymer: gelatin = 15: 30:
The mixture was mixed at a weight ratio of 55 and dissolved in pure water at a temperature of 80 ° C. to prepare an 8 wt% polymer aqueous solution. To this solution was added Snowtex OUP (colloidal silica) manufactured by Nissan Chemical Co., Ltd. in such an amount as to give a weight ratio of polymer component: OUP = 8: 92. Further, a coating aid, a pH adjuster, a bactericide and the like were added to obtain a coating liquid.

Preparation of coating solution: Aronix UV-3700 (ultraviolet curable acrylic resin) manufactured by Toa Gosei Chemical Co., Ltd.
Fine Pearl 3000SP manufactured by Sumitomo Chemical Co., Ltd. (6 μm
Polystyrene resin particles), methyl ethyl ketone, and toluene were mixed at a weight ratio of 14: 0.15: 13: 18 to obtain a coating solution.

Preparation of a test film: A coating solution was applied to one side of a polyester base colored blue with a thickness of 175 μm. The film thickness after drying was 5 μm. This is referred to as a film. Further, a film was obtained in which the coating liquid was applied to both sides of the polyester base so as to have a dry film thickness of 5 μm. Further, a coating solution was applied to an uncoated surface of the film so as to have a dry film thickness of 4 μm to obtain a film.

Test Sample Preparation: An ink at room temperature solid consisting of an aliphatic amide-containing material containing a tertiary alkyl primary amine and a black colorant having a pendant acid functionality in the form of at least one free acid. Using the film ~
A chest X-ray image was drawn on the application surface of the application liquid of Example 1 to obtain Samples 1 to 4, respectively. The highest density portion of the image was around 2.8 in optical density.

Judgment of effect: The sample was hung on a Schaukasten with a brightness of 10,000 lux with the image portion down, and the appearance of the reflected image on the film surface of a 40 W white fluorescent lamp 2 m diagonally above and behind the observer was observed. Judged. The appearance of the transmitted image on the Schaukasten was also determined at the same time. Table 1 shows the results of this determination.

Table 1

[0062]

[Example 2] Preparation of film 4: A solid component becomes 30% in X-12-2400 (vinyl group-containing silane ionizing radiation curable resin) manufactured by Shin-Etsu Chemical Co., Ltd. on a polyester base having a smooth surface. Amount of zirconium oxide microparticles in suspension is applied and irradiated with 5M rad electron beam at an acceleration voltage of 175 kV,
Once a cured film is formed. An adhesive (for example, LX660, KW758 curing agent manufactured by Dainippon Ink and Chemicals Co., Ltd.) is applied thereon, and a primer layer is applied to the uncoated surface of the film prepared in Example 1 in order to improve adhesion, and then transferred. .

Methyltriethoxysilane was dissolved in methyl ethyl ketone to a concentration of 3% by weight, and 0.005
Hydrolysis was performed by adding a prescribed hydrochloric acid and an alkoxide group of methyltriethoxysilane, and then a mixed solution of sodium acetate and acetic acid as a curing agent was added to obtain a silicic acid sol solution. To this solution, X-12-2400 (vinyl group-containing silane) manufactured by Shin-Etsu Chemical Co., Ltd. was added in an amount of 10% to obtain a coating solution for a low refractive index layer. This coating solution was applied onto the above-mentioned transferred film and dried to obtain a film having a high / low refractive index laminated structure.

Preparation of Film 5: On a polyester base having a smooth surface, a solid component was prepared by mixing X-12-2400 (vinyl group-containing silane ionizing radiation curable resin) manufactured by Shin-Etsu Chemical Co., Ltd.
% Of a zirconium oxide fine particle is suspended, and a 5M Rad electron beam is irradiated at an accelerating voltage of 175 kV to form a cured film. An adhesive (for example, LX660, KW758 hardener manufactured by Dainippon Ink and Chemicals Co., Ltd.) is applied on this, and a primer layer is applied on the uncoated surface of the film prepared in Example 1 to improve adhesion, and then transferred onto the film. . After applying an adhesive on this, X-12
A cured film of a zirconium oxide suspension in which the content of zirconium oxide in -2400 is 30% is transferred. Then, the coating liquid for the low refractive index layer produced at the time of producing the film 4 was further applied thereon to obtain a film having a middle / low / high refractive index laminated structure.

Preparation of Film 6: A solid component containing 5 solid components in X-12-2400 (vinyl group-containing silane ionizing radiation curable resin) manufactured by Shin-Etsu Chemical Co., Ltd.
% Of a zirconium oxide fine particle is suspended, and a 5 M rad electron beam is irradiated at an accelerating voltage of 175 kV to form a cured film once. An adhesive (for example, LX660, KW758 curing agent manufactured by Dainippon Ink and Chemicals Co., Ltd.) is applied on this, and a primer layer is applied to the end coating surface of the film prepared in Example 1 in order to improve adhesion, and then transferred. .

X-12-2400 (vinyl group-containing silane ionizing radiation curable resin) manufactured by Shin-Etsu Chemical Co. to which only 0.5% of zirconium oxide fine particles are added is applied to Toray's Lumirror E · 06 having an uneven surface. . This is 175k
After curing by irradiating 5 M rads with a V-accelerated electron beam, the film is transferred to the adhesive-coated film to obtain a film in which a middle refractive index layer and a low refractive index layer having an uneven surface are laminated.

Judgment of Effect A sample was hung on a Schaukasten with a brightness of 10,000 lux with the image portion facing down, and the appearance of the reflected image on the film surface of a 40 W self-color fluorescent lamp 2 m diagonally above and behind the observer was observed. Judged. The appearance of the transmitted image on the Schaukasten was also determined in the same manner. Table 2 shows the results of this determination.

Table 2

[0070]

[Example 3] Measurement of reflectivity The reflectivity of each sample was measured using Hitachi spectrophotometer U-4000. FIG. 4 shows a graph of the measurement results. As shown in FIG. 4, the samples of the present invention to the samples of the present invention have a lower reflectance than the sample of the comparative example.

[0072]

As described above, according to the first aspect of the present invention, an image is recorded on one surface of the support, and an anti-reflection film is provided on the other side, so that the image of the support is recorded. By providing an effect of preventing reflection on the back surface, image observation from the back surface is facilitated, and further, reflection is reduced without lowering transmittance, so that easy and accurate image observation is possible.

According to the second aspect of the present invention, the image is recorded with ink which is solid at room temperature, and the image is observed from the back surface of the support having the anti-reflection film on which the image is recorded, so that reflection is reduced. And easy and accurate image observation is possible.

According to the third aspect of the present invention, the transparency is reduced by dispersing synthetic resin particles and / or inorganic particulate materials in a polymer binder to impart antiglare properties on the surface of the support on which no image is recorded. Without reflection, the reflection is reduced and easy and accurate image observation is possible.

According to the fourth aspect of the present invention, synthetic resin particles and / or inorganic particulate material are dispersed in a binder on both sides of a support and coated, and an image is recorded on one side with an ink that is solid at room temperature. The reflection is reduced without lowering the transmittance, and easy and accurate image observation is possible.

According to the fifth aspect of the present invention, since two or more layers having different refractive indexes are laminated on the support surface on which no image is recorded, light reflected at the boundary between the laminated surfaces may interfere with each other. Can reduce the reflected light,
The reflection is reduced without lowering the transmittance, so that easy and accurate image observation is possible.

According to the sixth aspect of the present invention, the reflectance on the surface of the support on which no image is recorded is 4% or less when the wavelength width of the reflected light is at least 100 nm, so that the reflection can be achieved without lowering the transmittance. The reduced and easy and accurate image observation is possible.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a configuration of a medical dry film.

FIG. 2 is a cross-sectional view of another embodiment showing the configuration of a medical dry film.

FIG. 3 is a cross-sectional view of still another embodiment showing the configuration of a medical dry film.

FIG. 4 is a view showing a measurement result of a reflectance of a medical dry film.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Medical dry film 2 Support 3 Image 4 Antireflection film

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H025 AA00 AB11 DA18 DA34 DA39 4C096 DE10 4F100 AA01D AJ09 AK01D AK02 AK21 AK25 AK41 AS00D AT00A BA03 BA04 BA10B BA10C BA10D BA42 DE01D EH46 GB66 HB31C JB02 JB02

Claims (6)

[Claims] 1. A medical dry film for recording an image on a support, wherein the image is recorded on one surface of the support and an antireflection film is provided on the other side. 2. The image recording apparatus according to claim 1, wherein the image is recorded with an ink that is solid at room temperature, and the image is observed from a back surface having an antireflection film of a support on which the image is recorded with the ink. The medical dry film as described. 3. An anti-glare property provided by dispersing synthetic resin particles and / or an inorganic particulate material in a polymer binder on the surface of the support on which the image is not recorded. The medical dry film as described. 4. The method according to claim 2, wherein synthetic resin particles and / or inorganic particulate material are dispersed in a binder on both surfaces of the support and applied, and an image is recorded on one surface of the support with an ink which is solid at room temperature. The medical dry film as described. 5. The medical dry film according to claim 1, wherein two or more layers having different refractive indexes are laminated on the surface of the support on which the image is not recorded. 6. The reflectance on the surface of the support on which the image is not recorded is 4 when the wavelength width of the reflected light is at least 100 nm.
The medical dry film according to any one of claims 1 to 5, wherein the content is not more than%.