JP2002156498A - Radiation image conversion panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To manufacture a radiation image conversion panel that makes it possible to increase the productivity of a phosphor layer where phosphors are scattered in a bonding agent, improve the durability of the panel and obtain the high picture quality of it. SOLUTION: In the radiation image conversion panel that has a phosphor layer 12 where stimulate phosphors are scattered in the bonding agent and a protective layer 13 on a support 11, the bonding agent in the phosphor layer 12 contains a resin cured by ultraviolet rays or an electron beam and the phosphor layer 12 is cured through the irradiation of it with ultraviolet rays or an electron beam.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiation image conversion panel used for a radiation image conversion method using a stimulable phosphor.

[0002]

2. Description of the Related Art As an alternative to the conventional radiographic method, there is known a radiation image conversion method using a stimulable phosphor as described in, for example, JP-A-55-12145. This method uses a radiation image conversion panel (a stimulable phosphor sheet) containing a stimulable phosphor, and transmits radiation transmitted through a subject or emitted from a subject to the stimulable phosphor of the panel. And then stimulating the stimulable phosphor with electromagnetic waves (excitation light) such as visible light and infrared light in a time-series manner, so that the radiation energy accumulated in the stimulable phosphor is (Stimulated emission light), and the fluorescence is photoelectrically read to obtain an electric signal.
Then, a radiation image of the subject or the subject is reproduced as a visible image based on the obtained electric signal. The panel after reading is prepared for the next photographing after the remaining image is erased. That is, the radiation image conversion panel is used repeatedly.

According to this radiographic image conversion method, a radiographic image with a large amount of information can be obtained with a much smaller exposure dose than the radiographic method using a combination of a conventional radiographic film and an intensifying screen. There is an advantage that it can be obtained. Furthermore, in contrast to the conventional radiographic method, which consumes radiographic film for each photographing operation, this radiographic image conversion method uses a radiographic image conversion panel repeatedly, which is advantageous in terms of resource conservation and economic efficiency. It is.

A radiation image conversion panel used in a radiation image conversion method basically comprises a support and a phosphor layer provided on the surface thereof, except that the phosphor layer is self-supporting. Things. The phosphor layer is composed of a phosphor and a binder that contains and supports the phosphor in a dispersed state, and is composed of only an aggregate of the phosphor without a binder formed by an evaporation method or a sintering method. In addition, there are known those in which the gap between the phosphor aggregates is impregnated with a polymer substance. Among these phosphor layers, the phosphor layer in which the phosphor is dispersed in a binder made of an organic resin is relatively easy to control the image quality such as the light emission amount and noise, and it is easy to increase the mechanical strength. Is most often used.

[0005] Since the radiation image conversion panel is used repeatedly as described above, the repeated use thereof causes
The phosphor layer deteriorates due to moisture absorption or impact, and the image quality of the radiation image formed by the radiation image conversion panel tends to gradually decrease. In order to reduce such deterioration in image quality of the panel, a protective layer is usually provided on the phosphor layer to protect the phosphor layer from physical impact and chemical deterioration. Also, the mechanical strength of the phosphor layer itself has been increased, and conventionally, a method of producing a phosphor layer by sufficiently curing a relatively soft resin with a curing agent has been adopted.
Isocyanates, melamines, and the like have been used as curing agents.

[0006]

However, in the conventional method of curing a soft resin with a curing agent, it takes a long time to cure, or the curing reaction progresses with time, and the physical properties of the binder change. Therefore, there were problems in productivity and quality design. Further, a large amount of organic solvent must be used to disperse the phosphor with a resin or a curing agent, which is not very preferable from the viewpoint of a manufacturing environment.

On the other hand, WO 96/11479 discloses a polymerizable resin as a binder for an X-ray intensifying screen, and uses a silicone-based acrylamide siloxane.
amidosiloxane) is the most preferred,
The polymerizable resin having a silicone skeleton has low strength even when cured, and the phosphor particles are easily broken because the phosphor layer is formed by stretching with three rolls instead of coating. Since it is difficult to make the coating thickness of the layers uniform, good image quality cannot be expected.

The present invention has been made in view of the above circumstances, and in a radiation image conversion panel having a phosphor layer in which a phosphor is dispersed in a binder, the productivity of the phosphor layer is high.
It is another object of the present invention to provide a radiation image conversion panel which has high durability and can obtain good image quality.

[0009]

According to the present invention, there is provided a radiation image conversion panel having a phosphor layer in which a stimulable phosphor is dispersed in a binder. It is characterized by containing a resin, wherein the phosphor layer is cured by irradiation of ultraviolet rays or electron beams.

[0010] In addition to the ultraviolet or electron beam curable resin, the binder may further include an epoxy resin, an alicyclic epoxy resin,
It is preferable that the resin contains at least one resin selected from the group consisting of glycidyl ether epoxy resins. These resins may be used alone or in combination as appropriate.

The ultraviolet or electron beam curable resin is preferably a radical polymerizable resin or a cationic polymerizable resin, and the radical polymerizable resin is more preferably a non-yellowing urethane acrylate or a polyester acrylate. The cationic polymerization resin is more preferably a non-yellowing urethane vinyl ether or a polyester vinyl ether. These resins may be used alone or in combination as appropriate.

The weight-average molecular weight of the ultraviolet or electron beam curable resin is preferably 2,000 to 20,000, and the elongation at break (elongation at break) of the ultraviolet or electron beam curable resin after curing is 100% or more. Is preferred.

After the phosphor layer is cured, the phosphor layer is preferably subjected to a compression treatment. The compression treatment may be performed only on the phosphor layer or after the curing of the phosphor layer, or may be performed when the phosphor layer is overlaid on the support.

Preferably, a protective layer is laminated on the surface of the phosphor layer, wherein the protective layer contains the ultraviolet or electron beam curable resin, and the protective layer is irradiated with the ultraviolet or electron beam. Is preferably cured.

[0015] A resin film may be provided between the protective layer and the phosphor layer, or the protective layer may be provided directly on the phosphor layer.

[0016]

The radiation image conversion panel of the present invention comprises a phosphor layer in which a stimulable phosphor is dispersed in a binder, the binder comprising an ultraviolet or electron beam curable resin. Since the layer was cured by irradiation of ultraviolet rays or electron beams, the productivity of the phosphor layer was high, and the durability was high.
A radiation image conversion panel capable of obtaining good image quality can be obtained.

That is, in the conventional method of curing a soft resin with a curing agent, there are cases where inconvenience occurs such that it takes a long time to cure or the curing reaction progresses with time to change the physical properties of the binder. The phosphor layer of the present invention uses an ultraviolet or electron beam curable resin as a binder,
Since the phosphor layer is cured by irradiating the phosphor layer with ultraviolet rays or electron beams, the curing time is extremely short and the stability of the coating over time is high, so that the productivity of the phosphor layer can be improved. Further, since the amount of the organic solvent used can be suppressed as compared with the conventional case, the improvement of the manufacturing environment can be promoted.

Further, the ultraviolet or electron beam curable resin used as a binder for the phosphor layer has a much higher strength than the polymerizable resin having a silicone skeleton, so that the durability of the phosphor layer itself is improved. It is possible to obtain good image quality.

When at least one resin selected from the group consisting of an epoxy resin, an alicyclic epoxy resin, and a glycidyl ether epoxy resin is used as the binder in addition to the ultraviolet or electron beam curable resin, Since the yellowing of the stimulable phosphor can be prevented, a radiation image conversion panel capable of obtaining a higher quality image can be obtained.

When a radical polymerizable resin or a cationic polymerizable resin is used as the ultraviolet or electron beam curable resin, particularly, non-yellowing urethane acrylate, polyester acrylate, non-yellowing urethane vinyl ether and polyester vinyl ether are used. When used, or when an ultraviolet or electron beam curable resin having a weight average molecular weight of 2,000 to 20,000 is used, the above effect can be further enhanced.

The use of an ultraviolet or electron beam curable resin having an elongation at break of 100% or more after curing makes it possible to further improve the durability of the radiation image conversion panel at the time of transportation, and particularly to the support of the panel. Is flexible, the adhesion between the phosphor layer and the support can be improved, and problems such as cracking of the phosphor layer in repeated use can be suppressed.

Further, after the phosphor layer is cured, the phosphor layer is subjected to a compression treatment, whereby the thickness of the phosphor layer can be made uniform while suppressing the destruction of the phosphor particles. Better image quality can be expected.

When a protective layer is laminated on the surface of the phosphor layer, the phosphor layer is not directly subjected to a physical impact or a chemical alteration, so that the image quality can be improved over a long period of time. The protective layer may further include an ultraviolet ray or an electron beam curable resin, and the durability of the radiation image storage panel may be further improved by curing the protective layer by irradiation with an ultraviolet ray or an electron beam. be able to.

When the protective film is provided directly on the phosphor layer, a radiation image conversion panel having good light emission can be obtained. Further, when a transparent film is provided between the protective film and the phosphor layer, a radiation image conversion panel having more excellent durability can be obtained.

[0025]

Embodiments of the present invention will be described below with reference to the drawings. In the case where the phosphor layer has self-supporting properties, a support is not required. However, in this embodiment, a radiation layer having a phosphor layer, a support, and a protective layer, which is a general configuration of a radiation image conversion panel, is used. The image conversion panel will be described as an example.

FIG. 1 is a partial sectional view of a radiation image conversion panel showing a first embodiment of the present invention. As shown in FIG. 1, a radiation image conversion panel 10 of the present invention includes a support 11, a phosphor layer 12 laminated on a support 11, and a protective layer on the phosphor layer 12.
Reference numeral 13 denotes a laminated structure.

Although not shown, it is preferable that an edge of the radiation image conversion panel is edged to absorb moisture of the phosphor layer and to give strength to the radiation image conversion panel.

First, the stimulable phosphor that can be used in the phosphor layer of the radiation image storage panel will be described. The stimulable phosphor is a phosphor that emits stimulable light when irradiated with radiation and then irradiated with excitation light as described above, but the wavelength is in the range of 400 to 900 nm from a practical viewpoint. It is desirable that the phosphor be a phosphor that shows stimulated emission in a wavelength range of 300 to 500 nm by the excitation light. Examples of the stimulable phosphor used in the radiation image storage panel of the present invention are described in JP-B-7-84588 and the like.

General formula (M _{1 -f} · M _f ^I ) X · bM ^III X3 ″: cA (I)
The stimulable phosphor represented by From the viewpoint of the stimulated emission luminance, M ^I in the general formula (I) is preferably Na and K containing Rb, Cs and / or Cs, and particularly preferably at least one alkali metal selected from Rb and Cs. M ^III is preferably at least one trivalent metal selected from Y, La, Lu, Al, Ga and In. X "
Is preferably at least one halogen selected from F, Cl and Br. The b value representing the content of M ^III X3 ″ is preferably selected from the range of 0 ≦ b ≦ 10 ⁻² .

In the general formula (I), the activator A is
At least one metal selected from the group consisting of Eu, Tb, Ce, Tm, Dy, Ho, Gd, Sm, Tl and Na is preferable, and especially Eu, Ce, S
At least one metal selected from m, Tl and Na is preferred. The C value representing the amount of the activator is 10 ⁻⁶ <C <0.1.
It is preferable from the viewpoint of photostimulated light emission luminance.

Further, the following stimulable phosphors can also be used. U.S. patents listed in the 3,859,527 Pat SrS: Ce, Sm, SrS: Eu, Sm, ThO 2: Er, and La ₂ O ₂
S: Eu, Sm,

ZnS: C described in JP-A-55-12142
u, Pb, BaO.xAl ₂ O ₃ : Eu (0.8 ≦ x ≦ 10) and M ^II O.xSiO ₂ : A (where M ^II is Mg, Ca, Sr, Zn, C
d or Ba, and A is Ce, Tb, Eu, Tm, Pb, Tl, Bi
Or Mn, and x is 0.5 ≦ x ≦ 2.5),

(Ba) described in JP-A-55-12143
_1-Xy , Mg _X , Ca _y ) FX: aEu ²⁺ (where X is at least one of Cl and Br, and x and y are 0 <x + y
≦ 0.6 and xy ≠ 0, and a is 10 ⁻⁶ ≦ a ≦ 5 × 10 ⁻² ),

LnOX described in JP-A-55-12144:
xA (where Ln is at least one of La, Y, Gd, and Lu, X is at least one of Cl and Br, and A is
At least one of Ce and Tb, and x is 0
<X <0.1),

It is described in JP-A-55-12145 (B
a _1-X , M ²⁺ _X ) FX: yA (where M ²⁺ is at least one of Mg, Ca, Sr, Zn and Cd, X is at least one of Cl, Br and I, A Are Eu, Tb, Ce, Tm, Dy, Pr, H
at least one of o, Nd, Yb and Er, and x
Is 0 ≦ x ≦ 0.6, y is 0 ≦ y ≦ 0.2),

M ^II FX described in JP-A-55-160078
· XA: yLn (However, M ^II is Ba, Ca, Sr, Mg, Zn and Cd
A is BeO, MgO, CaO, SrO, Ba
O, ZnO, Al ₂ O ₃ , Y ₂ O ₃ , La ₂ O ₃ , In ₂ O ₃ , SiO ₂ , TiO ₂ , ZrO
₂ , GeO ₂ , SnO ₂ , Nb ₂ O ₅ , at least one of Ta ₂ O ₅ and ThO ₂ , Ln is Eu, Tb, Ce, Tm, Dy, Pr, Ho, Nd, Y
X is Cl, B at least one of b, Er, Sm and Gd
at least one of r and I, wherein x and y are respectively 5 × 10 ⁻⁵ ≦ x ≦ 0.5 and 0 <y ≦ 0.2)
A phosphor represented by the composition formula:

As described in JP-A-56-116777 (Ba
_1-X , M ^II _X ) F ₂ · aBaX ₂ : yEu, zA (where M ^II is at least one of beryllium, magnesium, calcium, strontium, zinc and cadmium, X is chlorine,
At least one of bromine and iodine, A is at least one of zirconium and scandium, and a, x, y, and z are each 0.5 ≦ a ≦ 1.25,
0 ≦ x ≦ 1, 10 ⁻⁶ ≦ y ≦ 2 × 10 ⁻¹ , and 0 <z ≦ 10 ⁻²
Is a phosphor represented by the composition formula:

As described in JP-A-57-23673 (B
a_1-X, M^II _X) F_Two・ ABaX_Two: yEu, zB (where M ^IIIs Belliriu
, Magnesium, calcium, strontium, zinc
And at least one of cadmium and X is chlorine,
At least one of bromine and iodine, a,
x, y, and z are respectively 0.5 ≦ a ≦ 1.25, 0 ≦ x ≦
1, 10^-6≦ y ≦ 2 × 10^-1, And 0 <z ≦ 10^-2Is)
A phosphor represented by a composition formula of

As described in JP-A-57-23675 (B
a _1-X , M ^II _X ) F ₂ aBaX ₂ : yEu, zA (where M ^II is at least one of beryllium, magnesium, calcium, strontium, zinc and cadmium, X is chlorine,
A is at least one of bromine and iodine, A is at least one of arsenic and silicon, and a, x, y,
And z are respectively 0.5 ≦ a ≦ 1.25, 0 ≦ x ≦ 1, 10 ⁻⁶
≦ y ≦ 2 × 10 ⁻¹ , and 0 <z ≦ 5 × 10 ⁻¹ ).

M ^III O described in JP-A-58-69281
X: xCe (where M ^III is Pr, Nd, Pm, Sm, Eu, Tb, Dy, H
at least one trivalent metal selected from the group consisting of o, Er, Tm, Yb and Bi, X is one or both of Cl and Br, and x is 0 <x <0.1
Is a phosphor represented by the composition formula:

Ba _1-X described in JP-A-58-206678
M _{X / 2} L _{X / 2} FX: yEu ²⁺ (where M represents at least one alkali metal selected from the group consisting of Li, Na, K, Rb and Cs; L represents Sc, Y, La, Ce, Pr, Nd, Pm, S
represents at least one trivalent metal selected from the group consisting of m, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Al, Ga, In and Tl; X is Cl, Br and I Represents at least one halogen selected from the group; and x is 10
^-2 ≦ x ≦ 0.5, and y is 0 <y ≦ 0.1).

BaFX.xA: yEu ²⁺ described in JP-A-59-27980
(Where X is at least one halogen selected from the group consisting of Cl, Br and I; A is a calcined product of a tetrafluoroborate compound; and x is 10 ⁻⁶ ≦
x ≦ 0.1, y is 0 <y ≦ 0.1) phosphor represented by the composition formula:

BaFX.x described in JP-A-59-47289
A: yEu ²⁺ (where X is at least one halogen selected from the group consisting of Cl, Br and I; A is monovalent or hexafluorosilicic acid, hexafluorotitanic acid and hexafluorozirconic acid) X is a calcined product of at least one compound selected from the group of hexafluoro compounds consisting of salts of divalent metals; and x is 10 ⁻⁶ ≦ x
≦ 0.1, y is 0 <y ≦ 0.1) phosphor represented by the composition formula:

BaFX.x described in JP-A-59-56479
NaX ′: aEu ²⁺ (where X and X ′ are Cl, B
r and at least one of I, wherein x and a are respectively 0 <x ≦ 2 and 0 <a ≦ 0.2)
A phosphor represented by the composition formula:

M ^II FX described in JP-A-59-56480
XNaX ': yEu ²⁺ : zA (where M ^II is at least one alkaline earth metal selected from the group consisting of Ba, Sr and Ca; X and X' are each selected from Cl, Br and I A is at least one halogen selected from the group consisting of; A is at least one transition metal selected from V, Cr, Mn, Fe, Co and Ni; and x is 0 <x ≦
2, y is 0 <y ≦ 0.2, and z is 0 <z ≦ 10 ⁻² ), a phosphor represented by a composition formula:

M ^II FX described in JP-A-59-75200
・ AM ^I X ′ ・ bM ′ ^II X ″ ₂・ cM ^III X ₃・ xA: yEu ²⁺ (However, M ^II
Is at least one alkaline earth metal selected from the group consisting of Ba, Sr and Ca; M ^I is at least one alkali metal selected from the group consisting of Li, Na, K, Rb and Cs; ^II is at least one divalent metal selected from the group consisting of Be and Mg; M ^III is Al, Ga, In
Is at least one trivalent metal selected from the group consisting of and Tl; A is a metal oxide; X is Cl, Br and I
X ′, X ″ and X are at least one halogen selected from the group consisting of F, Cl, Br and I; and a is 0 ≦ a ≦ 2, b is 0 ≦ b ≦ 10 ⁻² , c is 0 ≦ c ≦
10 ⁻² and a + b + c ≧ 10 ⁻⁶ ; x is 0 <x ≦ 0.5, y
Is 0 <y ≦ 0.2), a phosphor represented by a composition formula:

M ^II X described in JP-A-60-84381
₂ · aM ^II X ' ₂ : xEu ²⁺ (where M ^II is at least one alkaline earth metal selected from the group consisting of Ba, Sr and Ca; X and X' are composed of Cl, Br and I At least one halogen selected from the group and X ≠
X '; and a is 0.1≤a≤10.0, x is 0 <x≤0.
2, a stimulable phosphor represented by the composition formula:

M ^II FX described in JP-A-60-101173
AM ^I X ': xEu ²⁺ (where M ^{II is} at least one kind of alkaline earth metal selected from the group consisting ^of Ba, Sr and Ca; M ^I is at least one kind selected from the group consisting of Rb and Cs) X is at least one halogen selected from the group consisting of Cl, Br and I; X 'is at least one halogen selected from the group consisting of F, Cl, Br and I; a and x are respectively 0 ≦ a ≦ 4.0 and 0 <x ≦ 0.2), a stimulable phosphor represented by a composition formula:

[0049] have been described in JP-A-62-25189 M ^I X: x
Bi (however, M ^I is at least one alkali metal selected from the group consisting of Rb and Cs; X is at least one halogen selected from the group consisting of Cl, Br and I; and x is 0 <x A photostimulable phosphor represented by a composition formula of

LnOX: xCe described in JP-A-2-229882 (where Ln is at least one of La, Y, Gd and Lu;
X is at least one of Cl, Br and I, and x is 0 <x
≦ 0.2, and the ratio between Ln and X is 0.500 <X / Ln ≦
0.998, and the maximum wavelength λ of the stimulable excitation spectrum
Cerium-activated rare earth oxyhalide phosphor represented by 550 nm <λ <700 nm).

[0051] Further, the JP 60-84381 No. M ^II X ₂ · aM ^II X described in the _'2: xEu ²⁺ stimulable phosphor, additives such as shown below M ^II X ₂ · aM ^II X ′ ₂ may be contained in the following ratio per 1 mol.

BM described in JP-A-60-166379
^IX "(M^IIs selected from the group consisting of Rb and Cs
X "is at least one alkali metal, and X" is F, Cl, B
at least one member selected from the group consisting of r and I
And b is 0 <b ≦ 10.0);
BKX ″ and cMgX described in Sho 60-221483_Two・ DM
^IIIX ′_Three(However, M^IIIIs Sc, Y, La, Gd and Lu
At least one trivalent metal selected from the group consisting of
X ”, X and X ′ are all F, Cl, Br and I
At least one halogen selected from the group consisting of
And b, c and d are each 0 ≦ b ≦ 2.0,
0 ≦ c ≦ 2.0, 0 ≦ d ≦ 2.0, and 2 × 10^-Five≤b + c
+ d); yB described in JP-A-60-228592
(However, y is 2 × 10^-Four≦ y ≦ 2 × 10^-1JP-A-60
BA (where A is SiO _TwoAnd
And P_TwoO_FiveAt least one oxide selected from the group consisting of
And b is 10^-Four≦ b ≦ 2 × 10^-1);
BSiO described in No. 61-120883 (where b is 0 <b
≦ 3 × 10^-2Is described in JP-A-61-120885.
BSnX ″_Two(However, X ″ is composed of F, Cl, Br and I.
At least one halogen selected from the group consisting of
And b is 0 <b ≦ 10^-3Described in JP-A-61-235486.
BCsX ″ and cSnX listed_Two(However, X ″ and X are
A small number selected from the group consisting of F, Cl, Br and I, respectively.
At least a kind of halogen, and b and c are
0 <b ≦ 10.0 and 10 respectively^-6≦ c ≦ 2 × 10^-2In
BCs described in JP-A-61-235487
X ″ ・ yLn³⁺(However, X ″ consists of F, Cl, Br and I
Ln is at least one halogen selected from the group
Sc, Y, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb
At least one rare earth selected from the group consisting of
And b and y are each 0 <b ≦
10.0 and 10 ^-6≦ y ≦ 1.8 × 10^-1Is).

Among the above stimulable phosphors, a divalent europium-activated alkaline earth metal halide-based phosphor and a cerium-activated rare earth oxyhalide phosphor are particularly preferable because they exhibit high-luminance stimulable emission. However, the stimulable phosphor used in the present invention is not limited to the above-described phosphors, and any phosphor can be used as long as it exhibits stimulable emission when irradiated with radiation and then irradiated with excitation light. There may be.

However, the stimulable phosphor used in the present invention is not limited to the above-described phosphors, and any phosphor that emits stimulable light when irradiated with radiation and then with excitation light. There is no particular limitation.

As the ultraviolet or electron beam curable resin used for the binder of the phosphor layer, a radical polymerizable resin or a cationic polymerizable resin is preferable. The former includes monofunctional acrylate, bifunctional acrylate, trifunctional acrylate, ~ 6
Monomers such as functional acrylates, and oligomers such as epoxy acrylate, carboxyl-modified epoxy acrylate, urethane acrylate, polyester acrylate, and copolymer acrylate, and the latter include alicyclic epoxy resins, glycidyl ether epoxy resins, vinyl ether resins, Monomers such as oxetane compounds,
Oligomers such as alicyclic epoxy resins, glycidyl ether epoxy resins, urethane vinyl ethers, polyester vinyl ethers, and oxetane compounds are exemplified.
Especially, it is preferable to use a radical polymerization type oligomer or a cation polymerization type oligomer.

As the radical polymerization type oligomer, non-yellowing urethane acrylate and polyester acrylate are more preferable. Urethane acrylate is a compound having a urethane structure and an acryloyl group in the molecule. Non-yellowing urethane acrylate is a non-yellowing polymer such as polytetramethylene glycol or polyesterdiol and isocyanate forming a urethane structure such as hexamethylene diisocyanate. It uses isocyanate.
Polyester acrylate is ethylene glycol,
It is a dehydration compound of acrylic acid and polyester polyol obtained by the reaction of 1,6-hexanediol or trimethylolpropane with a polybasic acid such as adipic acid, or the ring-opening reaction of caprolactone.

As the cationic polymerization type oligomer, non-yellowing urethane vinyl ether and polyester vinyl ether are more preferable. The weight average molecular weight of these oligomers is preferably about 2,000 to 20,000.

The elongation at break after curing of the ultraviolet- or electron-beam-curable resin can be determined particularly when a flexible support is used.
It is preferably at least 100%, more preferably at least 200%, further preferably at least 300%. If the elongation at break is less than 100%, the flexibility of the phosphor layer is insufficient, so that the adhesion between the phosphor layer and the flexible support is deteriorated, or when the radiation image conversion panel is transported. Cracks are easily generated in the phosphor layer, and durability is deteriorated.

Further, acrylate monomers, vinyl compound monomers, acrylate oligomers, other cationic polymerization monomers, other cationic polymerization oligomers, etc. other than the above-mentioned ultraviolet or electron beam curable resins may be used in combination. .

The acrylate monomer is a low molecular weight compound having 1 to 6 acrylate groups and having a molecular weight of about 1000 or less, and a reactive group other than the acrylate group (isocyanate group, epoxy group, acid anhydride group, carboxyl group, etc.). May be provided. Further, the molecule may contain a halogen element such as fluorine or bromine in addition to sulfur.

Examples of these compounds include acrylates obtained by addition reaction of alkylene oxides such as ethylene oxide and propylene oxide or ε-caprolactone to alcohol, N-vinylcaprolactam, N-vinylcaprolactam, N-vinylformamide, imide acrylate, Preferred examples include poly (meth) acrylate, tricycloidedecane dimethylol diacrylate, dipentaerythritol penta and hexaacrylate, and ditrimethylol obtained by adding an alkylene oxide such as methacryloyloxyethyl isocyanate and propylene oxide or ε-caprolactone to a polyhydric alcohol. be able to.

Specific examples of the ultraviolet or electron beam curing resin include RAPI-CU manufactured by ASP Japan Co., Ltd.
RE series, manufactured by Asahi Denka Kogyo Co., Ltd .: Adeka Optomer KRM series, manufactured by Arakawa Chemical Industry Co., Ltd .: beam set series, manufactured by Osaka Organic Chemical Industry Co., Ltd .: various acrylates, manufactured by Kyoei Chemical Co., Ltd. : Light ester, light acrylate, epolite, epoxy ester, urethane acrylate series, manufactured by San Nopco Ltd .: Photomer
Series, manufactured by JSR Corporation: Desolite S series, Opstar JL, JM series, manufactured by Showa Kogyo Co., Ltd .: Lipoxy SP / VR series, manufactured by Shin-Nakamura Chemical Co., Ltd .: NK
Ester, NK Oligo Series, Daiichi Kogyo Pharmaceutical Co., Ltd.
Made: New Frontier Series, Daicel Chemical Industries
Co., Ltd .: each series of Placcel G, Cyclomer P, Eporide D, Eporide PB, Daimac, PUE, Daicel UCB Co., Ltd .: Ebecryl,
Uvecryl, celloside, dimax, Uvac
ure, EB series, Daiso Corporation: Daiso Dapp, Daiso Isodap series, Dainippon Ink & Chemicals, Ltd .: LUMICURE, UNIDEC series, Toagosei Co., Ltd .: Aronix M series ,
Toyobo Co., Ltd .: Virocure Series, Nagase Kasei Co., Ltd .: Denacol Acrylate, Nippon Kayaku Co., Ltd .:
KAYARAD series, manufactured by Nippon Synthetic Chemical Co., Ltd .: Shikko and Coponil series, Nippon SiberHegner
Ltd .: Actylene / Actilane Series, Nippon Soda Co., Ltd .: TE Series, Nippon Yushi Co., Ltd .: Blemmer Series, Negami Kogyo Co., Ltd .: Art Resin UN,
SH series, manufactured by Hitachi Chemical Co., Ltd .: Hitaloid
Series, manufactured by Mitsui Chemicals, Inc .: Orestar RA series,
Mitsubishi Rayon Co., Ltd .: Diamond Beam Series, Union Carbide Japan Co., Ltd .: CYRACURE UVR
・ Series, FS Japan Co., Ltd .: Larom
er, various acrylate series, Morton
International: Ubitane series and the like.

When the resin is cured by irradiating ultraviolet rays, a photopolymerization initiator such as a radical photopolymerization initiator, a cationic photopolymerization initiator, a radical photopolymerization accelerator, a cationic photopolymerization accelerator, or the like is further added. The agent is used in combination. When a photopolymerization initiator is used, a polymerization inhibitor such as benzoquinone may be used in combination. When curing with an electron beam, a photopolymerization initiator is unnecessary.

As the photopolymerization initiator, benzophenone,
Methyl orthobenzoylbenzoate, isopropylthioxanthone, diethylthioxanthone, benzyldimethylketal, α-hydroxyalkylphenone, α-amylalkylphenone, acylphosphine oxide,
Alkyl phenyl glyoxylate, diethoxyacetophenone and the like can be preferably used.

Specifically, Adeka Optomer SP series manufactured by Asahi Denka Kogyo Co., Ltd., Sun Aid SI series manufactured by Sanshin Chemical Industry Co., Ltd., Ciba Specialty Chemicals
Preferable examples include Irgacure and Darocure series, KAYACURE series by Nippon Kayaku Co., Ltd., and Lucirin series by BSF Japan Co., Ltd.

In order to prevent yellowing of the stimulable phosphor and obtain high image quality, the phosphor layer may be formed of an epoxy resin, an alicyclic epoxy resin, or a glycidyl ether epoxy resin, in addition to the ultraviolet or electron beam curable resin. More preferably, a resin is contained.

More specifically, Epicoat series such as Epicoat 1001, manufactured by Shell Petrochemical Co., Ltd., Asahi Denka Co., Ltd.
EP series such as Adeka Resin EP-4100, YSLV series such as YSLV-120TE manufactured by Nippon Steel Chemical Co., Ltd., and GK-4137 can be preferably used.

The support can be arbitrarily selected from known materials known as supports for conventional radiation image storage panels. To strengthen the bond between the support and the phosphor layer,
Alternatively, in order to improve the sensitivity or image quality (sharpness, granularity) of the radiation image conversion panel, a polymer substance such as gelatin is applied to the surface of the support on which the phosphor layer is provided to form an adhesion imparting layer. It is known to provide a light reflecting layer made of a light reflecting material such as titanium dioxide, or a light absorbing layer made of a light absorbing material such as carbon black. Also, these various layers can be provided, and the configuration thereof can be arbitrarily selected according to the desired purpose and use of the radiation image storage panel. Further, as described in JP-A-58-200200, in order to improve the sharpness of the obtained image, the surface of the support on the phosphor layer side (adhesiveness to the surface of the support on the phosphor layer side) When an application layer, a light reflection layer, a light absorption layer, or the like is provided, the surface thereof means fine irregularities.

Next, a method of manufacturing the radiation image storage panel of the present invention will be described. The phosphor layer can be formed on the support by the following method. First, a stimulable phosphor and an ultraviolet (electron beam) curable resin are added to a solvent, if necessary, and the mixture is sufficiently mixed to uniformly disperse the stimulable phosphor in the ultraviolet (electron beam) curable resin. A coating solution in which a stimulable phosphor is uniformly dispersed in a coating solution or a solution of an ultraviolet (electron beam) curable resin is prepared. Mixing ratio of ultraviolet (electron beam) curable resin to stimulable phosphor in the coating liquid (when epoxy resin or the like is added in addition to ultraviolet (electron beam) curable resin, these resins are cured with ultraviolet or electron beam. Mixing ratio of the sum of resin (hereinafter referred to as binder) and stimulable phosphor
Varies depending on the characteristics of the target radiation image conversion panel, the type of phosphor, and the like, but generally ranges from 1: 1 to 1: 100.
(Weight ratio), preferably from 1: 8 to 1:40 (weight ratio).

Next, the coating solution containing the phosphor and the binder prepared as described above is uniformly applied to the surface of the support to form a coating film. The solvent is removed with warm air or the like, and then the coating film is dried and cured by irradiating ultraviolet rays or electron beams. This coating operation can be performed by using ordinary coating means, for example, a doctor blade, a roll coater, a knife coater, an extrusion coater, or the like.

In the case of an ultraviolet curable resin, the output is 50 W / cm to 5
Cured by irradiating with a mercury lamp or metal halide lamp of about 00 W / cm for about 0.01 to 10 seconds.
In the case of an electron beam curable resin, the resin is cured by irradiating with an acceleration voltage of about 100 kV to 1000 kV for about 0.001 to 1 second.

Either the ultraviolet curable resin or the electron beam curable resin may be selected, but when the ultraviolet curable resin is selected, the irradiation time for curing is longer than when the electron beam curable resin is selected. However, since the ultraviolet irradiation device is small and inexpensive, the burden of new capital investment is reduced.

Examples of the ultraviolet irradiation apparatus are A-Line Co., Ltd .: Σ-Line, Eye Graphics Co., Ltd .: Eye Grandage, Eye Cure series, Iwasaki Electric Co., Ltd.
Manufactured by: Eye UV Cure System, manufactured by Ushio Inc .: UniCure System Series, manufactured by Chemitec Corporation: UV
C-Series, manufactured by San-A-Tech, Inc .: OPTICUR
E series, manufactured by Toshiba Lighting & Technology Corp .: Toskure series and the like can be preferably used.

As an electron beam irradiation device, Iwasaki Electric Co., Ltd.
Made by: ELECTROCURTAIN, USHIO INC.
Manufactured by Min-EB, manufactured by Sumitomo Heavy Industries, Ltd .: WIPL,
Lyocure manufactured by Toyo Ink Mfg. Co., Ltd., EPS series manufactured by Nissin High Voltage Co., Ltd. can be preferably used.

After forming the coating on the support, the coating is dried to complete the formation of the stimulable phosphor layer on the support.
The layer thickness of the phosphor layer varies depending on the characteristics of the intended radiation image conversion panel, the type of phosphor, the mixing ratio of the binder and the phosphor, and is generally preferably 20 μm to 1 mm. More preferably, the thickness is 50 to 500 μm.

The stimulable phosphor layer does not necessarily need to be formed by directly applying a coating solution on the support as described above. For example, a glass plate, a metal plate, a plastic sheet, etc. A phosphor layer is formed by applying a coating solution on the sheet and drying it, and then compressing it on a support, for example, by pressing a calender or a hot press, or using an adhesive. For example, the support and the phosphor layer may be joined.

As the protective film, a conventionally known protective film can be used, but it is preferably an ultraviolet (electron beam) curing type protective film. UV (electron beam) curing type protective film
It contains an ultraviolet (electron beam) curable resin, an oligomer or monomer, a curing catalyst if necessary, and a reactive silicone preferably having at least one vinyl group at the molecular terminal and having a number average molecular weight of about 5,000 to 20,000. The coating liquid for the protective film forming material is applied to a transparent support such as PET using a coating method such as a doctor blade, dip coater, slide coater, or extrusion coater, dried and cured. It is formed by providing it on the opposite PET surface and laminating it on the phosphor surface, or by directly applying, drying and curing it on the phosphor layer surface. Of course, this protective film may be formed simultaneously with the formation of the phosphor layer by simultaneous multi-layer coating.

In the case of an ultraviolet ray (electron beam) curing type protective film, it is necessary to irradiate with ultraviolet rays or an electron beam after coating and drying the solvent, and then to cure the film. The same device as that for curing the phosphor layer can be used. In this case, the curing means (ultraviolet light or electron beam) for the phosphor layer and the protective film may be the same or different.

As the ultraviolet (electron beam) curable resin used for forming the protective film, the same monomers and oligomers as those used for the phosphor layer are used, but since the coating film is thin, the elongation at break is 100%. From the viewpoint of enhancing the scratch resistance, the hardness is preferably as high as possible. The pencil hardness is preferably HB or more, more preferably H or more.

The protective film may contain a reactive silicone (vinyl group-containing silicone macromonomer) for improving antifouling properties. The reactive silicone preferably has, for example, a dimethylpolysiloxane skeleton and has at least one or more ultraviolet-curable functional groups (eg, vinyl group, methacryloxy group). Those having at least one functional group or two or more at one terminal are more preferable, and those having two or more ultraviolet-curable functional groups at one terminal are more preferable.

The number average molecular weight of the reactive silicone is 500
It is preferably in the range of 0 to 20,000, more preferably in the range of 10,000 to 15,000. Reactive silicone is
It is preferably contained in the protective film in the range of 0.1 to 20% by weight, particularly preferably in the range of 0.5 to 10% by weight.

The reactive silicone may contain a perfluoroalkyl group. These reactive silicones (silicone macromonomers) are commercially available from Chisso Corporation under the trade name: Syraprene FM-07 series, and may be used.

In addition to the above, in order to prevent the protective film from becoming uneven (preventing image quality deterioration) and improve the durability,
Further, organic or inorganic white fine powder may be contained. The average particle size of the fine powder is in the range of 0.1 to 2 μm, particularly preferably in the range of 0.3 to 1.5 μm. The addition amount of these fine powders is 1 to the binder of the protective film.
Preferably, it is contained in an amount of from 100 to 100% by weight, particularly 5 to 40% by weight in the case of an organic fine powder, and 10 to 100% by weight in the case of an inorganic fine powder. Further, the protective film may contain a coloring agent, a yellowing inhibitor and the like as needed.

For the purpose of improving the sharpness of the obtained image, at least one of the layers constituting the radiation image conversion panel of the present invention absorbs excitation light,
The stimulated emission light may be colored by a colorant that does not absorb the light (see Japanese Patent Publication No. 54-23400).

[0085]

EXAMPLES Example 1 A radiation image storage panel of the present invention was manufactured as follows. First, as a phosphor layer forming coating solution, phosphor: BaFBr _0.8 I _0.2 : 0.001Eu ²⁺ 1000 g,
Art resin as urethane acrylate oligomer
35 g of UN-9200A (manufactured by Negami Industry Co., Ltd .: elongation at break 660%), 1.3 g of Irgacure 184 (manufactured by Ciba Specialty Chemicals Co., Ltd.), a non-yellowing type photopolymerization initiator, bisphenol A type epoxy resin ( Shell Chemical Co., Ltd .: Epicoat 10
01) 30% of 50% MEK solution, 0.02 g of ultramarine as a colorant (Daiichi Kasei Kogyo Co., Ltd .: SM-1) and 32 g of MEK are dispersed by a disper for 3 hours and applied with a viscosity of 3.5 Pa · s (20 ° C). A liquid was prepared.

This coating solution was applied on a polyethylene terephthalate sheet (temporary support, thickness: 180 μm) coated with a silicone release agent by an extrusion (die) coater so as to have a dry thickness of 250 μm. After curing with an air-cooled metal halide lamp M08-L41 manufactured by Eye Graphic Co., Ltd. at a lamp output of 160 W / cm for 30 seconds, the film was peeled off from the temporary support.

Next, the following support having a reflective undercoat layer was prepared. 350 g of gadolinium oxide (Gd ₂ O ₃ ) fine particles (90% by weight of all particles having a particle diameter in the range of 1 to 5 μm), and a soft acrylic resin as a binder (Dainippon Ink & Chemicals, Inc.) ): 1800 g of Chris Coat P-1018GS (20% toluene solution), 40 g of phthalic acid ester as plasticizer (Daichi Chemical Co., Ltd .: # 10), ZnO whisker as conductive agent (Matsushita Amtech Co., Ltd .: Panatetra A- 1-1) 120 g and 2 g of ultramarine (Daiichi Kasei Kogyo Co., Ltd .: SM-1) as a colorant are added to MEK, dispersed and dissolved using a disper, and a dispersion for an undercoat layer (viscosity 0.5 Pa. s: 20 ° C), and adjust the polyethylene terephthalate sheet (Lumilar S-10 250μm, manufactured by Toray; haze (ty)
pical) = 20), uniformly coated on the other side of the light-shielding layer using an extrusion coater on a light-shielding layer (about 18 μm) made of carbon black, silica, and a binder on one side After drying, the coating is dried and the layer thickness is
A 20 μm reflective undercoat layer was formed.

Next, the phosphor sheet and the support having a reflective undercoat layer were superposed on each other, and a calender roll was used.
a, Heat compression was continuously performed at an upper roll temperature of 75 ° C, a lower roll temperature of 75 ° C, and a feed rate of 1.0 m / min. By this heating and compression, the phosphor sheet was completely fused to the support via the reflective undercoat layer to form a phosphor layer (layer thickness: 210 μm).

Next, a protective layer was formed by the following procedure.

Art resin UN330 (non-yellowing urethane acrylate, UV curable resin, NV = 100%) 12 g, organic filler (melamine formaldehyde: Nippon Shokubai Co., Ltd., eposter S6) 28.4 g, aluminum coupling agent as dispersant ( Ajinomoto Co., Ltd .: Prenact AL-M) 0.5g and 228g of MEK were mixed in a ball mill using 3mmφ zirconia balls.
After dispersion mixing for 0 hour, 108 g of Art Resin UN330, MEK
Was added and dispersed for 8 hours. Then, 1.4 g of silicone macromonomer FM-0725, Irgacure 184
(Photocuring catalyst) 4.5 g of MEK and 439 g of MEK were mixed to prepare a coating solution for a protective layer.

This protective layer coating solution was lined with a 6 μm-thick PET film (Toray Industries, Inc .: Lumirror 6-CF53) and a heat-resistant re-peelable film (PANAC, Inc .: CT50).
The film was coated on the film with a bar coater, and the solvent was dried at 100 ° C. A 2 μm protective layer was provided.

Next, the heat-resistant re-peelable film was peeled off from the 9 μm-thick PET film provided with the protective layer, and a polyester resin solution (Toyobo Co., Ltd .: Byron 30) was provided on the side opposite to the protective layer.
SS) is applied and dried to form an adhesive layer (adhesive application weight 2 g / m ² )
Was provided.

The PET film with the protective layer was adhered to the phosphor layer via an adhesive layer using a laminating roll to form a protective layer. Furthermore, Ra is applied to the protective layer with an embossing machine.
A 0.4 μm roughness emboss was applied.

Subsequently, a 20 μm thick OPP film (Toray
Co., Ltd .: Trefan YM-11 # 20), apply an unsaturated polyester resin solution (Toyobo Co., Ltd .: Byron 30SS) and dry to form an adhesive layer (adhesive application weight 9 g / m ² ). This OPP film was adhered to the opposite side (light-shielding layer side) of the support from the side on which the phosphor layer was provided using an adhesive layer using a laminating roll to form a back protective layer.

Further, 10.5 g of Art Resin UN330, 0.4 g of Irgacure 184, and an epoxy resin as an anti-yellowing agent (Yuika Shell Epoxy Co., Ltd .: Epicoat # 1001 (solid))
0.6 g, methacryloxypropyl-modified silicone F at one end
Dissolve 0.2 g of M-0725 and 10 g of MEK to prepare a coating solution,
This coating solution was applied to each side of the phosphor sheet provided with the protective layer previously produced, and dried at room temperature.
Irradiation was performed at 30 cm for 30 seconds to form a side cured film having a thickness of about 25 μm, thereby producing a radiation image conversion panel.

(Example 2) A urethane acrylate oligomer was used in place of the art resin UN-9200A used in Example 1.
A radiation image conversion panel was manufactured in the same manner except that the same amount of UA-4000 (manufactured by Shin-Nakamura Chemical Co., Ltd .: elongation at break: 350%) was used.

(Example 3) The coating solution for the phosphor layer and the coating solution for the protective layer used in Example 1 were coated on the phosphor layer coating solution using a multilayer coating die having two slits. Coating solution for the temporary support at the same time, after removing the solvent, 160W / c
The coating was dried and cured by irradiating ultraviolet rays for 30 seconds at m 2, and the phosphor layer with the protective layer was peeled off from the temporary support. The thickness of the phosphor layer after curing was 250 μm, and the thickness of the protective layer was 2 μm. Thus, a radiation image conversion panel was manufactured in the same manner as in Example 1 except that the phosphor layer with the protective layer was used and the protective layer was not separately provided.

(Comparative Example 1) Radiation was performed in the same manner as in Example 1 except that the following was used as the coating solution for the phosphor layer used in Example 1 and the solvent was dried at 120 ° C to obtain the phosphor layer. An image conversion panel was manufactured.

Fluorescent substance: BaFBr _0.85 I _0.15 : 1000 g of Eu ²⁺ (particle size: 3 μmφ / 7 μmφ = 5/5), polyurethane resin (manufactured by Dainippon Ink and Chemicals, Inc .: Pandex T-5205)
236.6 g of a 15% MEK solution of purified water of the product), polyisocyanate as a crosslinking agent (Nippon Polyurethane Industry Co., Ltd .: Coronate)
HX (100% solids)) 4.5 g, epoxy resin (Yuika Shell Epoxy Co., Ltd .: 50% MEK solution of EP1001) as a yellowing inhibitor 2
0 g, ultramarine as a colorant (Daiichi Kasei Kogyo Co., Ltd .: SM-1) 0.0
Add 2g to MEK, disperse by disperser, viscosity 3.5Pa ・
s (20 ° C.) was prepared. This is applied on polyethylene terephthalate (temporary support: thickness 180 μm) coated with a silicone release agent, dried at 120 ° C.,
The phosphor sheet (250 μm in thickness) was peeled off from the temporary support.

(Evaluation Experiment) Next, the radiation image conversion panel obtained above was evaluated for image quality and transport durability as follows.

1. Image quality After irradiating the radiation image conversion panel with X-rays at a tube voltage of 80 kVp, it is scanned with He-Ne laser light (632.8 nm) to excite the phosphor and stimulated emission emitted from the phosphor layer And converted into an electric signal, which was reproduced as an image by an image reproducing device to obtain an image on a display device. The amount of stimulated emission was measured from the obtained phosphor layer, the sharpness was determined by the modulation transfer function (MTF) (spatial frequency: 2 cycles / mm) of the obtained image, and the granularity at a dose of 0.1 mR ( RM).

2. Transport Durability The radiation image conversion panel was cut into a size of 100 mm × 250 mm, and the obtained test piece was transported in a transport device for testing shown in FIG. First, insert the test piece from the loading port 21,
It is moved between the guide plate 22 and the nip roll (diameter 25 mm) 23, and is transported by the conveyor belt 24 so that the rubber roll (diameter 40 mm) is used.
After bending inward along 25 and then bending outward, it was further moved between the guide plate and the nip roll. By repeating this transport operation, the phosphor layer of the test piece is damaged (cracked)
Was observed.

Table 1 shows the results. Note that the issue volume is Comparative Example 1.
Is shown as a relative value when 100 is taken.

[Table 1] As is clear from the above experimental results, the radiation image conversion panel of the present invention was excellent in running durability, and was also superior in emission amount, sharpness, and granularity as compared with the comparative example. Further, the radiation image conversion panel (Comparative Example 3), in which the protective layer was simultaneously coated, dried and cured in the simultaneous multilayer, has the same transport durability as the Comparative Example, but has the same light emission amount, sharpness, and granularity. It was particularly better than the comparative example.

As described above, in the radiation image conversion panel of the present invention, the binder in the phosphor layer contains an ultraviolet ray or an electron beam curable resin, and this phosphor layer is cured by irradiation of an ultraviolet ray or an electron beam. As a result, a radiation image conversion panel having high phosphor layer productivity, high durability, and good image quality could be obtained.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of a radiation image conversion panel according to a first embodiment of the present invention.

FIG. 2 is a transport device for testing a radiation image conversion panel.

[Explanation of symbols]

 10 Radiation image conversion panel 11 Support 12 Phosphor layer 13 Protective layer

Claims (13)

[Claims] 1. A radiation image conversion panel having a phosphor layer in which a stimulable phosphor is dispersed in a binder, wherein the binder contains an ultraviolet or electron beam curable resin, and the phosphor layer is A radiation image conversion panel, which is cured by irradiation of ultraviolet rays or electron beams. 2. The radiation according to claim 1, wherein the binder further comprises at least one resin selected from the group consisting of an epoxy resin, an alicyclic epoxy resin, and a glycidyl ether epoxy resin. Image conversion panel. 3. The radiation image conversion panel according to claim 1, wherein the ultraviolet or electron beam curable resin is a radical polymerizable resin. 4. The radiation image storage panel according to claim 3, wherein the radical polymerization resin is a non-yellowing urethane acrylate or a polyester acrylate. 5. The radiation image conversion panel according to claim 1, wherein the ultraviolet or electron beam curable resin is a cationic polymerization resin. 6. The radiation image storage panel according to claim 5, wherein the cationic polymerization resin is non-yellowing urethane vinyl ether or polyester vinyl ether. 7. The radiation image conversion panel according to claim 1, wherein the ultraviolet or electron beam curable resin has a weight average molecular weight of 2,000 to 20,000. 8. The radiation image conversion panel according to claim 1, wherein a breaking elongation after curing of the ultraviolet ray or electron beam curing resin is 100% or more. 9. The radiation image conversion panel according to claim 1, wherein the phosphor layer has been subjected to a compression treatment after the curing of the phosphor layer. 10. The radiation image conversion panel according to claim 1, wherein a protective layer is laminated on a surface of the phosphor layer. 11. The radiation image converter according to claim 10, wherein the protective layer contains the ultraviolet or electron beam curable resin, and the protective layer is cured by irradiation with the ultraviolet or electron beam. panel. 12. A resin film is provided between the protective layer and the phosphor layer.
12. The radiation image conversion panel according to 0 or 11. 13. The radiation image conversion panel according to claim 10, wherein the protective layer is provided directly on the phosphor layer.