JP2004077370A - Device and method for sealing stimulable phosphor sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize good workability without scratching a stimulable phosphor layer and without wrinkling a sealing film. <P>SOLUTION: It consists of a sealing device for a stimulable phosphor sheet having at least a pair of heat welding means sandwiching the stimulable phosphor sheet with two sheets of sealing film and heat welding the sealing films under reduced pressure condition. It is provided with a main body provided with an opening part in which loading bed is disposed, a lid body openably attached to the main body and a pressing means pressing the whole surface of the stimulable phosphor sheet loaded on the loading bed when the lid body is closed and releasing the pressing when the lid body is opened. <P>COPYRIGHT: (C)2004,JPO

Description

【００５８】
本発明の有効性が確認された。
【００５９】
【発明の効果】
輝尽性蛍光体シートを２枚の封止フィルムで挟み、減圧条件下で２枚の封止フィルムを熱溶着し封止する時、輝尽性蛍光体層にキズを付けることなく、又、輝尽性蛍光体層側の封止フィルムにシワを発生させることなく封止ができ、作業性が良い輝尽性蛍光体シートの封止装置及びこの装置を使用した輝尽性蛍光体シートの封止方法を提供することができ、作業性が大幅に向上し、工程の稼働率が上がった。
【図面の簡単な説明】
【図１】本発明の封止装置の一例を示す概略図である。
【図２】図１に示す封止装置の蓋体が開いている状態の概略断面図である。
【図３】図２のＸで示される部分の拡大概略断面図である。
【符号の説明】
１　封止装置
２　本体
２０１　載置台
２０２　開口部
３　蓋体
４　輝尽性蛍光体シート
４ａ　輝尽性蛍光体層
４ｂ　可撓性支持体
５ａ、５ｂ　封止フィルム
６ａ、６ｂ　加熱部材
６ｃ　シリンダ
７　押圧板
８　吊り下げ部材
９　緩衝部材[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a device for sealing a stimulable phosphor sheet having a stimulable phosphor layer formed on a flexible support, and a method for sealing a stimulable phosphor sheet using the device.
[0002]
[Prior art]
Radiation images such as X-ray images are often used for diagnosis of diseases. In order to obtain this X-ray image, X-rays that have passed through the subject are irradiated onto a stimulable phosphor (fluorescent screen), and the resulting visible light is used in the same manner as when a normal photograph is taken using a silver salt. A so-called radiograph which is developed by irradiating a film is used. However, in recent years, a method has been devised for directly taking out an image from a stimulable phosphor without using a film coated with a silver salt.
[0003]
As a method for taking out an image, after the radiation transmitted through the subject is absorbed by the stimulable phosphor, the stimulable phosphor is excited by light or heat energy, and the stimulable phosphor is accumulated. There is a method of emitting radiation energy as fluorescence and detecting and imaging this fluorescence. Specifically, a stimulable phosphor sheet having a stimulable phosphor layer formed on a flexible support is used, for example, in U.S. Pat. No. 3,859,527 and JP-A-55-12144. A radiation image conversion method is described.
[0004]
In these methods, the stimulable phosphor layer of the stimulable phosphor sheet is irradiated with radiation transmitted through the subject to accumulate radiation energy corresponding to the radiation transmission density of each part of the subject, and thereafter the stimulable phosphor layer is irradiated. By exciting the layer in time series with electromagnetic waves (excitation light) such as visible light and infrared light, the radiation energy accumulated in the stimulable phosphor layer is emitted as stimulable luminescence, and the intensity of this light is reduced. Is obtained, for example, by photoelectrically converting the signal to obtain an electric signal, and reproducing the signal as a visible image on a recording material such as a photosensitive film or a display device such as a CRT.
[0005]
According to this radiographic image recording / reproducing method, it is possible to obtain a radiographic image that is rich in information with a much smaller exposure dose than the conventional radiographic method using a combination of a radiographic film and an intensifying screen. There is an advantage that can be.
[0006]
Such a stimulable phosphor is a stimulable phosphor that emits stimulable light when irradiated with radiation and then with excitation light. However, in practice, excitation light having a wavelength in the range of 400 to 900 nm is used. A stimulable phosphor that emits stimulable light in the wavelength range of 300 to 500 nm is generally used.
[0007]
As the stimulable phosphor sheet, a coating type in which a stimulable phosphor layer is coated on a flexible support is widely used because it is easy to handle, easy to make, and has stable performance. I have. Since the stimulable phosphor has a disadvantage that it is easily decomposed by humidity and the image is liable to be degraded, when used, the stimulable phosphor sheet is sealed with a moisture-proof film to prevent image deterioration due to humidity. Prevention is commonly employed. In the present invention, a highly moisture-proof film used for sealing the stimulable phosphor sheet is referred to as a sealing film, and the stimulable phosphor sheet sealed with the sealing film is referred to as a sealed body. At the time of actual use, the sealed body is fixed to a plate-like tray with an adhesive member (generally referred to as a stimulable phosphor panel), and is loaded into an imaging device.
[0008]
As a sealing film sealing method, for example, JP-A-11-223890 discloses a method in which a stimulable phosphor sheet is placed in a bag-shaped sealing film having an opening, and the stimulable phosphor layer side is sealed. Degas the inside of the sealing device so as not to wrinkle when sealing the film, and press the opening with a pressing plate so that air does not partially remain between the stimulable phosphor layer and the sealing film. Are disclosed. However, a disadvantage of this method is that the press plate is replaced with the stimulable phosphor layer every time sealing is performed so that air does not partially remain between the stimulable phosphor layer and the sealing film. It is necessary to lift the pressing plate and remove it when the sealing is completed. When these press plates are placed on or removed from the stimulable phosphor layer, if they are dropped on the stimulable phosphor layer, naturally, the stimulable phosphor layer is not scratched and becomes a product . Further, even if dragged, the stimulable phosphor layer will be scratched and will not be a product, so that the work must be performed carefully and takes a long time, which is one of the causes of lowering the work efficiency. In addition, every time the seal is sealed, the pressing plate must be placed on or removed from the stimulable phosphor layer, and the work is burdened on the operator.
[0009]
[Problems to be solved by the invention]
The present invention has been made in view of the above situation, and an object of the present invention is to sandwich a stimulable phosphor sheet between two sealing films and heat-bond the two sealing films under reduced pressure. When sealing, the stimulable phosphor layer has a good workability without scratching the stimulable phosphor layer and without generating wrinkles in the sealing film on the stimulable phosphor layer side. An object of the present invention is to provide a sealing device and a method for sealing a stimulable phosphor sheet using the device.
[0010]
[Means for Solving the Problems]
The above object of the present invention has been achieved by the following constitutions.
[0011]
1) A heat welding means in which a stimulable phosphor sheet having a stimulable phosphor layer formed on a flexible support is sandwiched between two sealing films, and the sealing films are heat-sealed under reduced pressure. In the device for sealing a stimulable phosphor sheet having at least one pair, a main body having an opening provided with a mounting table for the stimulable phosphor sheet, and an opening attached to the main body to be openable and closable. A lid for sealing, and when the lid is closed, the entire surface of the stimulable phosphor layer of the stimulable phosphor sheet placed on the mounting table is pressed, and the lid is closed. A device for sealing a stimulable phosphor sheet, comprising a pressing means for releasing the pressing when opened.
[0012]
2) The heating member for pressing the sealing film on the flexible support side of the stimulable phosphor sheet provided on the main body, and the luminosity of the stimulable phosphor sheet provided on the lid. The stimulable phosphor sheet sealing device according to 1), further comprising a pair of heating members having a heating member for pressing the sealing film on the stimulable phosphor layer side.
[0013]
3) The device for sealing a stimulable phosphor sheet according to 1), wherein the pressing means is a pressing plate having a mass of 9.8 to 5 × 9.8 N.
[0014]
4) A stimulable phosphor sheet having a stimulable phosphor layer formed on a flexible support by using the stimulable phosphor sheet sealing device according to any one of 1) to 3). A method for sealing a stimulable phosphor sheet, comprising sandwiching between two sealing films to seal the stimulable phosphor sheet.
[0015]
5) At least, a stimulable phosphor sheet having a stimulable phosphor layer formed on a flexible support is sandwiched between two sealing films, and the two sealing films are thermally welded under reduced pressure. In a sealing method for sealing a stimulable phosphor sheet using a sealing device having a pair of heat welding means, the sealing device has an opening provided with a mounting table for the stimulable phosphor sheet. A stimulable phosphor sheet mounted on the mounting table when the lid is closed, the stimulable phosphor sheet having a main body, and a lid body that is openably and closably attached to the main body to seal an opening. Pressing means for pressing the entire surface of the phosphor layer and releasing the pressing of the entire surface of the stimulable phosphor layer of the stimulable phosphor sheet placed on the mounting table when the lid is opened is provided. When pressing, a buffer member is disposed between the pressing means and the sealing film on the stimulable phosphor layer side, and the sealing film is thermally welded. Stimulable phosphor sheet sealing method, characterized in that.
[0016]
6) The buffer member has a bulk density of 20 to 50 kg / m. ³ The method for sealing a stimulable phosphor sheet according to 5), wherein the compression hardness is 980 to 4900 Pa.
[0017]
7) The heating member for pressing the sealing film on the flexible support side of the stimulable phosphor sheet provided on the main body, and the luminosity of the stimulable phosphor sheet provided on the lid body. The method for sealing a stimulable phosphor sheet according to 5), comprising a pair of heating members having a heating member for pressing the sealing film on the stimulable phosphor layer side.
[0018]
8) The method for sealing a stimulable phosphor sheet according to 5), wherein the pressing means is a pressing plate having a mass of 9.8 to 5 × 9.8 N.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the present invention will be described with reference to FIGS.
[0020]
FIG. 1 is a schematic view showing an example of the sealing device of the present invention. FIG. 1A is a schematic perspective view of the sealing device. FIG. 1B is a schematic sectional view taken along the line AA ′ of FIG.
[0021]
In the figure, reference numeral 1 denotes a sealing device. Reference numeral 2 denotes a mounting table on which a stimulable phosphor sheet 4 having a stimulable phosphor layer formed on a flexible support sandwiched between two sealing films 5a and 5b is provided. 1 shows a body having 202. When the stimulable phosphor sheet 4 sandwiched between the two sealing films 5 a and 5 b is mounted on the mounting table 201, the abutting portion provided at the end of the mounting table 201 to regulate the position is set. Show. Note that the abutting portion 201a is arranged in the width direction of the mounting table 201. Numeral 203 indicates that air remains between the stimulable phosphor sheet 4 and the two sealing films 5a and 5b when the stimulable phosphor sheet 4 and the two sealing films 5a and 5b are sealed by heat welding. In order to prevent this, a degassing tube for reducing the pressure inside the sealing device 1 is shown, and is connected to a vacuum pump (not shown). The degree of reduced pressure at the time of sealing is preferably 100 to 10,000 Pa. If it is less than 100 Pa, the flatness of the stimulable phosphor sheet may not be maintained depending on the type of the sealing film used. If it exceeds 10,000 Pa, depending on the type of sealing film used, air may remain between the stimulable phosphor sheet and the sealing film, causing wrinkles.
[0022]
Reference numeral 3 denotes a lid that covers the opening 202 of the main body 2 and is attached to the main body 2 so as to be freely opened and closed. This figure shows a case where the hinge 301 is attached.
[0023]
Reference numeral 6a denotes a heating member of the heat welding means provided on the main body 2, which is disposed at an end along the width direction of the mounting table 201.
[0024]
Reference numeral 6b denotes a heating member of the heat welding means provided on the lid 3, which is fixed to an end along the width direction of the lid 3 at a position facing the heating member 6a provided on the main body 2. The heating member 6b is connected to a cylinder 6c via a shaft 6d, and is movable in the direction of the arrow in the figure. The temperature and heating time of the heating members 6a and 6b may be set each time according to the sealing film to be used, or may be controlled by a control means (not shown) to which the welding temperature and time of the sealing film to be used are input in advance. It does not matter. The heating member is not particularly limited, and examples thereof include an impulse heater and a cartridge heater.
[0025]
This drawing shows a sealing device in the case where the sealing film to be used is in the shape of a bag. In order to seal one location of the opening of the sealing film in the shape of a bag, the heating member is provided at one location. This shows a case in which they are provided. The location where the heating member is provided can be increased depending on the shape of the sealing film used. For example, when one sealing film is folded and used from the center and used, it is possible to arrange heating members at three places to seal three places.
[0026]
Reference numeral 7 denotes a pressing plate of the pressing means. The shape of the pressing plate 7 is preferably a flat plate that can uniformly press the entire surface of the stimulable phosphor sheet. The pressing plate 7 is movable through one of the ends into a long hole 7c provided in a guide plate 7b attached to both sides of the mounting table 201 via pins 7a provided in both ends of the pressing plate 7. The other end is supported in a suspended state by hanging members 8 provided on both sides inside the lid 3.
[0027]
This figure shows a state where the stimulable phosphor layer side is pressed by the pressing plate 7. The mass of the press plate 7 is preferably 9.8 to 5 × 9.8 N. If the press plate 7 is less than 9.8 N, the pressing force is insufficient, and wrinkles may occur depending on the type of the sealing film used. is there. If it exceeds 5 × 9.8 N, the pressing force becomes excessive, and the stimulable phosphor layer may be deformed depending on the type of the sealing film used.
[0028]
Reference numeral 9 denotes a buffer provided between the sealing film 5a on the stimulable phosphor layer side of the stimulable phosphor sheet and the press plate 7 in order to keep the pressure of the stimulable phosphor layer pressed by the press plate 7 constant. The members are shown. The buffer member 9 has a bulk density of 20 to 50 kg / m. ³ The compression hardness is preferably 980-4900 Pa. Bulk density is 20kg / m ³ If it is less than the above, depending on the material of the cushioning member, it may be crushed by the pressing plate and lose the cushioning function, causing wrinkles. 50kg / m ³ If it exceeds twice, depending on the degree of pressure reduction during sealing, air partially remaining between the stimulable phosphor layer and the sealing film may not be easily degassed and may be wrinkled.
[0029]
If the compression hardness is less than 980 Pa, it may be crushed by the pressing plate to lose the buffer function and cause wrinkles. If the pressure exceeds 4900 Pa, air partially remaining between the stimulable phosphor layer and the sealing film may be hardly degassed and may be wrinkled, depending on the degree of pressure reduction during sealing. The bulk density and the compression hardness are values measured according to JIS K6767.
[0030]
FIG. 2 is a schematic sectional view of the sealing device shown in FIG. 1 in a state where a lid is open. The reference numerals in the figure are the same as those in FIG.
[0031]
When the lid 3 is opened, the pressing plate 7 arranged inside the lid 3 is opened when the lid 3 is opened. It moves along the elongated hole 7c provided in the guide plate 7b attached to both sides and is suspended by the hanging member 8 inside the lid 3, and the pressing of the stimulable phosphor layer is released. State.
[0032]
FIG. 3 is an enlarged schematic sectional view of a portion indicated by X in FIG. In this figure, the heating member and the mounting table are omitted in order to explain the configurations of the sealing film and the stimulable phosphor sheet.
[0033]
As the sealing film 5a for sealing the stimulable phosphor layer 4a provided on the flexible support 4b, it is preferable to use a laminated material having an outer layer 5a2 and a welding layer 5a1. The sealing film 5a irradiates the subject with radiation by the photographing device, and accumulates radiation energy corresponding to the radiation transmission density of each part of the subject that has passed through the subject in the stimulable phosphor layer of the stimulable phosphor sheet. After that, radiation energy accumulated in the photostimulable phosphor layer is emitted as photostimulated light by exciting in a time series manner with electromagnetic waves (excitation light) such as visible light and infrared light, and photoelectrically converted. It needs to be transparent in order to be extracted as a visible image. The sealing film 5b for sealing the flexible support 4b side is preferably made of a laminated material having an outer layer 5b2 and a welding layer 5b1. The sealing film 5b may be the same as or different from the sealing film 5a.
[0034]
The welding layers 5a1 and 5b1 are sealant layers that are sandwiched between a heating member 6a provided on the main body and a heating member 6b provided on the lid, and are melt-bonded by heating while pressing. The stimulable phosphor sheet 4 is sealed by the sealing films 5a and 5b by fusion bonding. The outer layers 5a2 and 5b2 have a moisture-proof layer for protecting the stimulable phosphor sheet from humidity.
[0035]
Next, using the sealing device of the present invention shown in FIG. 1 and FIG. 2, the stimulable phosphor sheet sandwiched between the bag-shaped sealing films placed on the mounting table in the state shown in FIG. The sealing method will be described step by step.
1) The temperature, heating time, and degree of pressure reduction of the heating member of the sealing device are set according to the properties of the sealant layer of the sealing film to be used.
2) Open the lid of the sealing device.
3) A bag in which two sealing films are heat-sealed on three sides is used for the mounting table provided, and a transparent sealing film is formed on the stimulable phosphor layer side to form a bag. The stimulable phosphor sheet sandwiched between the stop films is placed on a mounting table with the stimulable phosphor layer side up. At this time, it is placed so that the opening of the bag-shaped sealing film is above the heating member.
4) A buffer member is placed on the stimulable phosphor sheet sandwiched between the bag-shaped sealing films.
5) Close the lid of the sealing device. By closing the lid, the stimulable phosphor layer side is pressed by the pressing plate of the pressing means attached to the lid via the buffer member. In this state, the heating member provided on the lid is in a state of being lifted upward by the cylinder.
6) The inside of the sealing device 1 is evacuated by a vacuum pump through an exhaust port.
7) After the set pressure reduction degree, degassing is performed for a predetermined time. After the deaeration is completed, the heating member 6b provided on the lid 3 is lowered by operating the cylinder 6c, and the sealing films 5a and 5b on the heating member 6a are pressed. After pressing at a predetermined temperature for a predetermined time, the cylinder 6c is operated to raise the heating member 6b, the lid 3 is opened to release the pressing by the pressing plate 7, and the sealed stimulable phosphor sheet 4 is removed from the main body. Take out.
[0036]
Through the steps 1) to 7), the work of mounting and removing the pressing plate, which has been conventionally performed, is eliminated, and the stimulable phosphor sheet can be easily sealed with the sealing film. The risk of scratches on the stimulable phosphor layer due to the installation work of the pressing plate was eliminated, the work efficiency was improved, and the operation rate of the process was increased.
[0037]
The sealing film used on the stimulable phosphor layer side to seal the stimulable phosphor sheet includes, for protecting the stimulable phosphor layer of the stimulable phosphor sheet from humidity, and In order to take out an image of a subject from the stimulable phosphor layer, a transparent laminated material containing at least one inorganic vapor-deposited layer as described in JP-A-6-95302 is more preferably used from the viewpoint of moisture resistance. Further, it is necessary to laminate a heat-meltable resin film on the sealant layer which comes into contact with the sealing film used on the support.
[0038]
Examples of these inorganic vapor-deposited films include thin film handbooks p879 to p901 (Japan Society for the Promotion of Science), vacuum technology handbooks p502 to p509, p612, and p810 (Nikkan Kogyo Shimbun), and revised vacuum handbooks p132 to p134 (ULVAC Japan Vacuum Technology K.K.). Inorganic films as described in K). For example, Cr ₂ O ₃ , Si _x O _y (X = 1, y = 1.5-2.0), Ta ₂ O ₃ , ZrN, SiC, TiC, PSG, Si ₃ N ₄ , Single crystal Si, amorphous Si, W, AI ₂ O ₃ Are used.
[0039]
Examples of the thermoplastic resin film used as the base material on which the inorganic substance deposited layer is provided include ethylene tetrafluoroethyl copolymer (ETFE), high density polyethylene (HDPE), oriented polypropylene (0PP), polystyrene (PS), and polymethyl methacrylate (PMMA). ), Stretched nylon (ONy), polyethylene terephthalate (PET), polycarbonate (PC), polyimide, polyether styrene (PES), and other film materials used for general packaging films.
[0040]
As a thermoplastic resin film to be laminated via an inorganic vapor-deposited film sheet, a polymer film used as a general packaging material (for example, a polymer film described in Toray Research Center Co., Ltd., a new development of functional packaging materials) is used. High density polyethylene (LDPE), HDPE, linear low density polyethylene (LLDPE), medium density polyethylene, unstretched polypropylene (CPP), OPP, ONy, PET, cellophane, polyvinyl alcohol (PVA), stretched vinylon (OV), ethylene- Vinyl acetate copolymer (EVOH), vinylidene chloride (PVDC) and the like can be used.
[0041]
As the thermoplastic resin film, a multi-layer film formed by co-extrusion with a different kind of film, a multi-layer film formed by laminating at different stretching angles, and the like can be used as required. Further, it is of course possible to combine the density and molecular weight distribution of the film used to obtain the required physical properties.
[0042]
As the thermoplastic resin film of the innermost layer, it is preferable to use LDPE, LLDPE, LDPE, LLDPE produced using a metallocene catalyst, or a film obtained by mixing these films with an HDPE film.
[0043]
Since the sealing film used on the support surface side enhances moisture resistance, it is preferable to use an opaque laminated film which is the same except that an aluminum foil is used instead of the above-mentioned inorganic vapor-deposited layer.
[0044]
As a method of manufacturing the laminated film, various methods generally known as a method of laminating another film via a film on which an inorganic substance is deposited and a film laminated with an aluminum foil are used, for example, wet lamination. It can be made by using a method, a dry lamination method, a hot melt lamination method, an extrusion lamination method, or a heat lamination method.
[0045]
Examples of the material used for the tray include aluminum (Al) and aluminum alloy. Examples of the aluminum alloy include an Al-Mg alloy, an Al-magnesium (Mg) -silicon (Si) alloy, an Al-copper (Cu) alloy, an Al-Si alloy, and an Al-zinc (Zn) -Mg alloy. Alloys and the like.
[0046]
Examples of the flexible support used for the stimulable phosphor sheet according to the present invention include a plastic film such as a cellulose acetate film, a polyester film, a polyethylene terephthalate film, a polyamide film, a polyimide film, a triacetate film, and a polycarbonate film; and an aluminum foil. Metal sheets such as aluminum alloy foil, general paper and printing base paper such as photographic base paper, coated paper or art paper, baryta paper, resin coated paper, Belgian Patent No. 784,615. Papers sized with such polysaccharides, pigment papers containing pigments such as titanium dioxide, and processed papers such as paper sized with polyvinyl alcohol. Among these, a plastic film is preferably used as a flexible support because of its ease of processing and handling.
[0047]
The thickness of the flexible support varies depending on the material of the flexible support to be used and the like, but is generally 80 to 1000 μm, and more preferably 80 to 500 μm from the viewpoint of handling. . The surface of these supports may be a smooth surface or a mat surface.
[0048]
The stimulable phosphor layer is composed of a binder and stimulable phosphor particles. "Stimulable phosphor" that forms the stimulable phosphor layer means that after the first light or high-energy radiation is applied, it becomes optical, thermal, mechanical, scientific or electrical, etc. It refers to a stimulable phosphor that emits stimulable luminescence corresponding to the initial dose of light or high-energy radiation when stimulated (stimulated excitation). From a practical point of view, a stimulable phosphor that emits stimulable light by photostimulation (stimulated excitation) is preferable, and a stimulable phosphor that emits stimulable light by a stimulating light having a wavelength of 500 nm or more and 1 μm or less. The body is preferred.
[0049]
Specific examples of the stimulable phosphor constituting the stimulable phosphor layer include, for example, JP-A Nos. 55-12145, 55-160078, 56-74175, 56-116777, and 57-. No. 23,673,57-23675,58-206678,59-27,289,59-27,980,59-56,479,59-56,480, etc. Halogenated phosphors: JP-A-59-75200, JP-A-60-84381, JP-A-60-106752, JP-A-60-166379, JP-A-60-221483, JP-A-60-228592, and JP-A-60-228593. Nos. 61-23679, 61-120882, 61-120883, 61-120885, 61-235486, and 6 JP-A-235487, etc .; divalent europium-activated alkaline earth metal fluorohalide-based phosphor described in JP-A-55-12144; rare-earth-element-activated oxyhalide phosphor described in JP-A-55-12144; Cerium-activated trivalent metal oxyhalide phosphor described above; bismuth-activated alkali metal halide phosphor described in JP-A-60-70484; divalent phthalocyanine described in JP-A-60-141783 and 60-157100 Europium-activated alkaline earth metal halophosphate phosphor; divalent europium-activated alkaline earth metal haloborate phosphor described in JP-A-60-157 099; divalent europium-activated alkaline earth metal haloborate phosphor described in JP-A-60-217354 Europium-activated alkaline earth metal hydride halide phosphors; described in JP-A Nos. 61-21173 and 61-21182. Cerium-activated rare earth complex halide phosphor; cerium-activated rare earth halophosphate phosphor described in JP-A-61-40390; divalent europium-activated cerium rubidium halide phosphor described in JP-A-60-78151 A divalent europium-activated composite halide phosphor described in JP-A-60-78151.
[0050]
【Example】
Hereinafter, the effects of the present invention will be specifically described with reference to Examples, but the present invention is not limited thereto.
[0051]
Example 1
<Stimulable phosphor sheet>
The stimulable phosphor sheet used for Regius plate-1S manufactured by Konica Corporation was used.
[0052]
<Sealing film>
A film having a multilayer structure of PET 12 μm / alumina-deposited PET 12 μm / CPP 30 μm and a film having a multilayer structure of PET 100 μm / Al foil 9 μm / CPP 30 μm are previously overlapped with the size of the stimulable phosphor sheet, and three sides are heat-welded to form a bag. Used.
[0053]
<Preparation of sealed body>
Using the sealing device shown in FIG. 1, the mass of the pressing plate, the bulk density of the cushioning member, and the compression hardness were changed as shown in Table 1 to produce sealed bodies, and samples 101 to 110 were obtained.
[0054]
During the production of the sealed body, the opening of the bag-shaped sealing film containing the stimulable phosphor sheet is sealed by heat welding at a temperature of 150 ° C. for 1.5 seconds under a reduced pressure of 450 Pa. Sealing was performed.
[0055]
<Evaluation>
For each of the obtained samples 101 to 110, the presence or absence of wrinkles on the surface of the sealed body and the sealed body were opened, and the presence or absence of scratches on the stimulable phosphor layer was visually observed. Table 1 shows the results of the evaluation.
[0056]
Generation of wrinkles on the surface of the sealed body
：: No wrinkles on the surface of the sealed body were observed
Δ: Wrinkles on the surface of the sealed body were observed to such an extent that there was no practical problem.
×: Wrinkles on the surface of the sealed body were observed to such an extent that they would pose a practical problem
[0057]
[Table 1]

[0058]
The effectiveness of the present invention has been confirmed.
[0059]
【The invention's effect】
When the stimulable phosphor sheet is sandwiched between two sealing films and the two sealing films are heat-sealed and sealed under reduced pressure conditions, the stimulable phosphor layer is not scratched, A sealing device for a stimulable phosphor sheet that can be sealed without generating wrinkles in the sealing film on the stimulable phosphor layer side and has good workability, and a stimulable phosphor sheet using this device. A sealing method could be provided, workability was greatly improved, and the operation rate of the process was increased.
[Brief description of the drawings]
FIG. 1 is a schematic view showing an example of a sealing device of the present invention.
FIG. 2 is a schematic sectional view of the sealing device shown in FIG. 1 in a state where a lid is open.
FIG. 3 is an enlarged schematic sectional view of a portion indicated by X in FIG. 2;
[Explanation of symbols]
1 Sealing device
2 body
201 Mounting table
202 opening
3 Lid
4 Stimulable phosphor sheet
4a Photostimulable phosphor layer
4b Flexible support
5a, 5b sealing film
6a, 6b heating member
6c cylinder
7 Press plate
8 Suspension members
9 cushioning members

Claims (8)

A stimulable phosphor sheet having a stimulable phosphor layer formed on a flexible support is sandwiched between two sealing films, and at least a heat welding means for heat-sealing the sealing films under reduced pressure conditions is provided. In a sealing device for a stimulable phosphor sheet having a pair, a main body having an opening provided with a mounting table for the stimulable phosphor sheet and an opening which is openably and closably attached to the main body are sealed. When the lid was closed, the entire surface of the stimulable phosphor layer of the stimulable phosphor sheet placed on the mounting table was pressed, and the lid was opened. A sealing means for stimulable phosphor sheet, wherein a pressing means for releasing the pressing is provided. A heating member for pressing the sealing film on the flexible support side of the stimulable phosphor sheet provided on the main body, and a stimulability of the stimulable phosphor sheet provided on the lid; The stimulable phosphor sheet sealing device according to claim 1, wherein the pair of heating members includes a heating member that presses the sealing film on the phosphor layer side. The stimulable phosphor sheet sealing device according to claim 1, wherein the pressing means is a pressing plate having a mass of 9.8 to 5 x 9.8N. 4. Two stimulable phosphor sheets each having a stimulable phosphor layer formed on a flexible support using the device for sealing a stimulable phosphor sheet according to claim 1. A method for sealing a stimulable phosphor sheet, comprising sandwiching the stimulable phosphor sheet with a sealing film. A stimulable phosphor sheet having a stimulable phosphor layer formed on a flexible support is sandwiched between two sealing films, and at least one pair of heat-sealed two sealing films under reduced pressure conditions. In a sealing method for sealing a stimulable phosphor sheet using a sealing device having a heat welding means, the sealing device includes a main body having an opening in which a mounting table for the stimulable phosphor sheet is provided. A lid which is openably and closably attached to the main body and which seals an opening, and when the lid is closed, the stimulable phosphor of the stimulable phosphor sheet placed on the mounting table. Pressing means for pressing the entire surface of the layer and releasing the pressing of the entire surface of the stimulable phosphor layer of the stimulable phosphor sheet placed on the mounting table when the lid is opened is provided. When performing the sealing, a cushioning member is disposed between the pressing means and the sealing film on the stimulable phosphor layer side, and the sealing film is thermally welded. Stimulable phosphor sheet sealing method characterized by. The buffer member has a bulk density of 20 to 50 kg / ^{m 3,} the stimulable phosphor sheet sealing method of claim 5, compressive hardness is characterized in that it is a 980～4900Pa. A heating member for pressing the sealing film on the flexible support side of the stimulable phosphor sheet provided on the main body, and a stimulability of the stimulable phosphor sheet provided on the lid; The method for sealing a stimulable phosphor sheet according to claim 5, comprising a pair of heating members having a heating member for pressing the sealing film on the phosphor layer side. The method for sealing a stimulable phosphor sheet according to claim 5, wherein the pressing means is a pressing plate having a mass of 9.8 to 5 x 9.8N.

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