JP2000275398A - Fluorescent screen - Google Patents
Fluorescent screenInfo
- Publication number
- JP2000275398A JP2000275398A JP11124704A JP12470499A JP2000275398A JP 2000275398 A JP2000275398 A JP 2000275398A JP 11124704 A JP11124704 A JP 11124704A JP 12470499 A JP12470499 A JP 12470499A JP 2000275398 A JP2000275398 A JP 2000275398A
- Authority
- JP
- Japan
- Prior art keywords
- protective film
- phosphor layer
- phosphor
- fluorescent
- phosphors
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Conversion Of X-Rays Into Visible Images (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は放射線像を可視像に
変換する蛍光板に関する。更に詳細には、容易に剥離す
ることが出来る保護膜を蛍光体層表面に設け、蛍光体層
の汚染や欠落を防止した蛍光板に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluorescent plate for converting a radiation image into a visible image. More specifically, the present invention relates to a phosphor plate in which a protective film that can be easily peeled off is provided on the surface of the phosphor layer to prevent contamination and omission of the phosphor layer.
【０００２】[0002]
【従来の技術】周知のように、放射線像を可視像に変換
する蛍光板（以下。「蛍光板」という）は、基本的には
放射線増感紙と同様に、Ｘ線、γ線等の電離放射線の照
射を受けた際に高効率に発光する蛍光体を結合剤樹脂中
に分散させた蛍光体層をプラスチック等の支持体上に形
成してなり、カメラなどの撮像装置内の銀塩フイルムや
ＣＣＤ撮像素子などの光センサーと対峙させて設置して
おき、これに被写体を透過した放射線を照射して該被写
体の放射線像を蛍光面である蛍光板の蛍光体層表面に形
成させ、光センサーによりこの被写体の放射線像を記録
し、被写体の放射線像を得るために使用される。2. Description of the Related Art As is well known, a fluorescent plate for converting a radiation image into a visible image (hereinafter, referred to as a "fluorescent plate") is basically an ionizing device for X-rays, γ-rays, etc., like a radiation intensifying screen. A phosphor layer in which a phosphor that emits light with high efficiency when irradiated with radiation is dispersed in a binder resin is formed on a support such as plastic, and a silver halide film in an imaging device such as a camera. And an optical sensor such as a CCD image sensor, and irradiates radiation transmitted through the subject to form a radiation image of the subject on the phosphor layer surface of the phosphor plate, which is a phosphor screen. Is used to record a radiation image of the subject and obtain a radiation image of the subject.
【０００３】ところで、蛍光板には、保護膜を設けてい
ないものと、蛍光体層表面に保護膜を設けてあるものと
があるが、前者の保護膜を設けていない蛍光板では、保
管中、運搬中、撮像装置へのセッティング中等、その取
り扱い作業中に蛍光体層に汚れが付着したり、蛍光体層
が欠損したりして、これが画質の低下要因になり易く、
一方、後者の、蛍光体層表面に保護膜が設けられたタイ
プの蛍光板の場合、保護膜が設けられていないものに比
べて鮮鋭度の低下等、保護膜による光学的特性の変化に
起因した画質の低下が起こり、また、従来の蛍光板にお
いては保護膜と蛍光体層との接着強度が十分に強いた
め、使用直前にこの保護膜を剥離して画質の低下を避け
ようとしても保護膜の剥離時に蛍光体層に損傷を与えて
結果的に画質を低下させてしまうという弊害があるとこ
ろからその改善が望まれていた。[0003] By the way, there are two types of fluorescent screens, in which a protective film is not provided, and those in which a protective film is provided on the surface of a phosphor layer. During the handling operation, such as during setting to the imaging device, the phosphor layer is stained, or the phosphor layer is damaged, which is likely to cause a decrease in image quality,
On the other hand, in the latter case, in the case of a phosphor plate of a type in which a protective film is provided on the phosphor layer surface, a change in optical characteristics due to the protective film, such as a decrease in sharpness as compared with the case where the protective film is not provided. Since the image quality deteriorates and the adhesive strength between the protective film and the phosphor layer is sufficiently strong in the conventional fluorescent plate, even if the protective film is peeled off immediately before use to avoid the image quality deterioration, Since there is a problem that the phosphor layer is damaged at the time of peeling and the image quality is reduced as a result, the improvement has been desired.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、蛍光板が有
するこのような問題点を解決するためになされたもので
あり、保管、運搬、撮像装置へのセッティングの過程な
どにおける蛍光板の蛍光面の汚れや損傷などが発生しに
くくて、画質の良好な蛍光板を提供することを目的とす
るものである。SUMMARY OF THE INVENTION The present invention has been made to solve such a problem of the fluorescent screen, and has been developed to solve the problems of the fluorescent screen of the fluorescent screen in the process of storage, transportation, setting in an imaging device, and the like. It is an object of the present invention to provide a fluorescent plate with good image quality, in which dirt, damage, and the like hardly occur.
【０００５】[0005]
【課題を解決するための手段】本発明者は上記目的を達
成するために蛍光板の構造に関して鋭意検討した結果、
蛍光板の蛍光面である、蛍光体層表面に設ける保護膜の
接着力を強固にはせず適度な接着強度に調節することに
よって、蛍光板の使用に際して保護膜が容易に剥離し得
るようにすれば上記目的が達成し得ることを見出し下記
構成の蛍光板を完成させた。The present inventor has conducted intensive studies on the structure of the fluorescent plate in order to achieve the above object.
If the protective film provided on the phosphor layer surface, which is the fluorescent surface of the fluorescent plate, is not strengthened and is adjusted to an appropriate bonding strength, the protective film can be easily peeled off when the fluorescent plate is used. The inventors have found that the above object can be achieved, and have completed a fluorescent plate having the following configuration.
【０００６】即ち、本発明は、 （１）支持体、結合剤樹脂中に分散された蛍光体からな
る蛍光体層、接着剤層及び保護膜をこの順序に積層して
なり、上記蛍光体層と上記保護膜との間の引き剥がし接
着力が室温下において４０〜１００ｇ／（２０ｍｍ幅）
であることを特徴とする蛍光板。 （２）上記保護膜の外周端部に、上記蛍光体層の外周端
縁から突出した突出片を有していることを特徴とする上
記（１）の蛍光板。That is, the present invention provides: (1) a support, a phosphor layer composed of a phosphor dispersed in a binder resin, an adhesive layer, and a protective film laminated in this order; The peel adhesion between the protective film and the protective film is 40 to 100 g / (20 mm width) at room temperature.
A fluorescent screen characterized by the following. (2) The fluorescent plate according to (1), wherein a protrusion protruding from an outer peripheral edge of the phosphor layer is provided at an outer peripheral end of the protective film.
【０００７】[0007]
【発明の実施の形態】以下、本発明を更に詳細に説明す
る。本発明の蛍光板を製造するには、放射線用蛍光体を
硝化綿をはじめとする結合剤と共に適当量混合し、更に
これに有機溶剤を加えて適当な粘度の蛍光体塗布液を調
製して、この蛍光体塗布液をナイフコーターやロールコ
ーター等によって紙、プラスチックなどからなる支持体
上に塗布し、乾燥することにより蛍光体層を形成してお
く。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail. In order to produce the phosphor plate of the present invention, a phosphor for radiation is mixed with a binder such as nitrified cotton in an appropriate amount, and an organic solvent is further added thereto to prepare a phosphor coating solution having an appropriate viscosity. The phosphor coating solution is applied to a support made of paper, plastic, or the like by a knife coater, a roll coater, or the like, and dried to form a phosphor layer.
【０００８】一方、これとは別に、有機溶剤に溶解した
ポリエステル系樹脂等の熱可塑性樹脂からなる接着剤塗
布液を調製し、これをポリエチレンテレフタレート（Ｐ
ＥＴ）フイルム上に塗布して片面に接着剤を有する保護
膜を作製する。次に、支持体上に形成された蛍光体層の
表面に上述のようにして別途作製された保護膜を、接着
剤層側が蛍光体層側と対峙するようにしてラミネートす
ることにより本発明の蛍光板を得る。On the other hand, separately from this, an adhesive coating liquid made of a thermoplastic resin such as a polyester resin dissolved in an organic solvent is prepared, and this is coated with polyethylene terephthalate (P).
ET) A protective film having an adhesive on one side by coating on a film is prepared. Next, a protective film separately prepared as described above is laminated on the surface of the phosphor layer formed on the support, such that the adhesive layer side faces the phosphor layer side, whereby the present invention is applied. Obtain a fluorescent screen.
【０００９】本発明の蛍光板に使用される支持体として
は、酢酸セルロース、プロピオン酸セルロース、酢酸酪
酸セルロース、ポリエチレンテレフタレート等のポリエ
ステル、ポリスチレン、ポリメチルメタクリレート、ポ
リアミド、ポリイミド、塩化ビニル−酢酸ビニルコポリ
マー、ポリカーボネートなどの樹脂をフィルム状に成形
したもの、バライタ紙、レジンコート紙、通常の紙、ア
ルミニウム合金箔など従来の蛍光板や増感紙に用いられ
る素材が用いられる。The support used for the fluorescent plate of the present invention includes polyesters such as cellulose acetate, cellulose propionate, cellulose acetate butyrate and polyethylene terephthalate, polystyrene, polymethyl methacrylate, polyamide, polyimide, vinyl chloride-vinyl acetate copolymer, Materials used for conventional fluorescent screens and intensifying screens, such as a resin formed from polycarbonate or the like in the form of a film, baryta paper, resin-coated paper, ordinary paper, and aluminum alloy foil are used.
【００１０】また、本発明の蛍光板の蛍光体層を製造す
るための蛍光体塗布液に使用される結合剤樹脂として
は、硝化綿、酢酸セルロース、エチルセルロース、ポリ
ビニルブチラール、線状ポリエステル、ポリ酢酸ビニ
ル、塩化ビニリデン−塩化ビニルコポリマー、塩化ビニ
ル−酢酸ビニルコポリマー、ポリアルキル−（メタ）ア
クリレート、ポリカーボネート、ポリウレタン、セルロ
ースアセテートブチレート、ポリビニルアルコール、ゼ
ラチン、デキストリン等のポリサッカライド、アラビア
ゴムなど、従来より増感紙や蛍光板の蛍光体層作製のた
めの結合剤として知られているものであれば、特に制限
はなく、また、この時用いられる上記各結合剤樹脂の量
は、得られる蛍光板の鮮鋭度並びに耐久性を低下させな
い点で、蛍光体層中の蛍光体に対して２〜６重量％とす
るのが特に好ましい。The binder resin used in the phosphor coating solution for producing the phosphor layer of the phosphor plate of the present invention includes nitrified cotton, cellulose acetate, ethyl cellulose, polyvinyl butyral, linear polyester, and polyvinyl acetate. , Vinylidene chloride-vinyl chloride copolymer, vinyl chloride-vinyl acetate copolymer, polyalkyl- (meth) acrylate, polycarbonate, polyurethane, cellulose acetate butyrate, polyvinyl alcohol, gelatin, polysaccharides such as dextrin, and gum arabic. There is no particular limitation as long as it is known as a binder for preparing a phosphor layer of a light-sensitive paper or a fluorescent plate, and the amount of each binder resin used at this time depends on the sharpness of the obtained fluorescent plate. In addition, in that it does not reduce the durability, Particularly preferably 2 to 6% by weight relative to the optical body.
【００１１】更に、蛍光体塗布液の調製に使われる有機
溶剤としては、たとえばエタノール、メチルエチルエー
テル、酢酸ブチル、酢酸エチル、エチルエーテル、キシ
レンなどが用いられる。Further, as the organic solvent used for preparing the phosphor coating solution, for example, ethanol, methyl ethyl ether, butyl acetate, ethyl acetate, ethyl ether, xylene and the like are used.
【００１２】本発明の蛍光板の蛍光体層に用いられる放
射線用蛍光体としては、特に組成上の制限はなく、例え
ば、ＣａＷＯ４、ＹＴａＯ４、ＹＴａＯ４：Ｔｍ、ＹＴ
ａＯ４：Ｎｂ、ＢａＳＯ４：Ｐｂ、ＨｆＯ２：Ｔｉ、Ｈ
ｆＰ２Ｏ７：ＣＵ、ＣｄＷＯ４、Ｇｄ２Ｏ２Ｓ：Ｔｂ、
ＧｄＴａＯ４：Ｔｂ、Ｇｄ２Ｏ３・Ｔａ２Ｏ５・Ｂ２Ｏ
３：Ｔｂ、（Ｇｄ，Ｙ）２Ｏ２Ｓ：Ｔｂ、Ｇｄ２Ｏ
２Ｓ：Ｔｂ、（Ｇｄ，Ｙ）２Ｏ２Ｓ：Ｔｂ，Ｔｍ等、Ｘ
線等、放射線の照射を受けたとき高輝度の発光を呈する
蛍光体の中の少なくとも１種が使用できる。There is no particular restriction on the composition of the radiation phosphor used in the phosphor layer of the phosphor plate of the present invention. For example, CaWO 4 , YTaO 4 , YTaO 4 : Tm, YT
aO 4 : Nb, BaSO 4 : Pb, HfO 2 : Ti, H
fP 2 O 7 : CU, CdWO 4 , Gd 2 O 2 S: Tb,
GdTaO 4 : Tb, Gd 2 O 3 .Ta 2 O 5 .B 2 O
3 : Tb, (Gd, Y) 2 O 2 S: Tb, Gd 2 O
2 S: Tb, (Gd, Y) 2 O 2 S: Tb, Tm, etc., X
At least one kind of phosphor that emits light with high luminance when irradiated with radiation such as a line can be used.
【００１３】本発明の蛍光板の保護膜としては、例え
ば、ポリエステル、ポリプロピレン、ポリアミド、ポリ
カーボネート、ポリイミド、セロハンなど、従来公知の
プラスチックフイルムや紙等が用いられる。ただし、本
発明の蛍光板に用いられる保護膜は、蛍光体層から発す
る蛍光を透過させる必要はないので、着色の有無、厚み
等をはじめ、光透過性に関しての制限はないが、その厚
みが１〜２０μｍ程度の保護膜を用いる。As the protective film of the fluorescent plate of the present invention, for example, conventionally known plastic films or papers such as polyester, polypropylene, polyamide, polycarbonate, polyimide, cellophane and the like are used. However, since the protective film used for the fluorescent plate of the present invention does not need to transmit the fluorescent light emitted from the phosphor layer, there is no limitation on the light transmittance, including the presence or absence of coloring, the thickness, etc. A protective film having a thickness of about 20 μm is used.
【００１４】保護膜の片面に形成する接着剤層として用
いられる接着剤としてはアクリル系、ゴム系、ポリアミ
ド系、ビニール系、ポリエステル系、ポリウレタン系な
どの熱可塑性樹脂、天然ゴム、合成ゴムなどが用いら
れ、これらの樹脂を蛍光体層調製のための有機溶剤と同
様の有機溶剤中に溶解させた接着剤塗布液をバーコータ
ー、グラビヤコーター、ダイコーターなどの塗布装置を
用いて保護膜の片面に塗布し、乾燥することにより接着
剤層を形成する。この接着剤層の乾燥後の厚みとしては
およそ０．１〜２μｍとされる。As the adhesive used as the adhesive layer formed on one side of the protective film, thermoplastic resins such as acrylic, rubber, polyamide, vinyl, polyester, and polyurethane, natural rubber, and synthetic rubber are used. An adhesive coating solution obtained by dissolving these resins in an organic solvent similar to the organic solvent for preparing the phosphor layer is coated on one side of the protective film using a coating device such as a bar coater, a gravure coater, or a die coater. And dried to form an adhesive layer. The thickness of the adhesive layer after drying is about 0.1 to 2 μm.
【００１５】蛍光体層表面への保護膜の接着は、蛍光体
層が形成された支持体と接着剤層が形成された保護膜と
を、蛍光体層面と接着剤層とが対峙するようにして重
ね、加熱されたローラー中を通過させて熱ラミネートす
る方法が推奨される。The protective film is adhered to the surface of the phosphor layer so that the support on which the phosphor layer is formed and the protective film on which the adhesive layer is formed are arranged such that the phosphor layer surface and the adhesive layer face each other. It is recommended that the sheets be stacked and passed through a heated roller for heat lamination.
【００１６】本発明の蛍光板は、蛍光体層と保護膜とが
運搬などの過程で簡単には剥離しない程度に適度に接着
されていて、かつ、これを強制的に剥離させようとする
と適度な引っ張り力を付与することによって比較的簡単
に剥離し得る程度の接着力を有する。具体的には、この
接着力の程度は、蛍光板の蛍光体層と保護膜との引き剥
がし接着力を測定して評価した。引き剥がし接着力の測
定には、万能引張試験機（株式会社東洋ボールドウイン
社製、ＳＴＭ−Ｔ−５０型）を使用し、得られた各蛍光
板を幅が２０ｍｍの短冊状に裁断して試験片とし、２５
℃の室温下において蛍光体層付支持体及び保護膜のそれ
ぞれの先端を掴んで、これらを互いに１８０゜の方向へ
３０ｍｍ／分の剥離スピードで引張った際、両者が剥離
した時の強度（試験片の２０ｍｍ幅当たりの引張り荷重
で表示）を求めることによってその蛍光板の２０ｍｍ幅
当たりの引き剥がし接着力とした。本発明の蛍光板にお
いては、この値がほぼ４０〜１００ｇ／（２０ｍｍ幅）
の範囲にある時、運搬などの取り扱い時においては保護
膜の剥離がなく、使用に際してはこれを強制的に剥離す
る時は蛍光体層への損傷を与えることなく容易に保護膜
が剥離できて取り扱いが容易となった。In the phosphor plate of the present invention, the phosphor layer and the protective film are appropriately adhered so as not to be easily detached in the course of transportation or the like. It has such an adhesive strength that it can be relatively easily peeled off by applying a tensile force. Specifically, the degree of the adhesive strength was evaluated by measuring the peeling adhesive strength between the phosphor layer of the phosphor plate and the protective film. To measure the peel adhesion, a universal tensile tester (manufactured by Toyo Baldwin Co., Ltd., Model STM-T-50) was used, and each fluorescent plate obtained was cut into strips having a width of 20 mm. 25 pieces
When the phosphor layer-attached support and the protective film were gripped at room temperature at a temperature of 30 ° C. and pulled in the direction of 180 ° at a peeling speed of 30 mm / min, the strength at which both peeled off (test (Indicated by a tensile load per 20 mm width of each piece) was determined as the peeling adhesive strength per 20 mm width of the fluorescent plate. In the phosphor plate of the present invention, this value is approximately 40 to 100 g / (20 mm width).
When it is in the range, there is no peeling of the protective film at the time of handling such as transportation, and at the time of use, when it is forcibly peeled, the protective film can be easily peeled without damaging the phosphor layer Handling became easy.
【００１７】蛍光体層と保護膜との接着強度の調整は、
使用する接着剤の種類や、接着剤層の厚みにより異なる
が、ラミネートする際の温度、加圧圧力などの調節によ
り比較的簡単に行うことができるが、６５〜８０℃にし
た熱ロール中を２０〜３０ｋｇ／ｃｍの圧力で０．５〜
２ｍ／分の速度でもってラミネートするとよい。The adjustment of the adhesive strength between the phosphor layer and the protective film is performed by:
Although it depends on the type of adhesive used and the thickness of the adhesive layer, it can be relatively easily performed by adjusting the temperature at the time of lamination, pressure and the like. 0.5 ~ at a pressure of 20 ~ 30kg / cm
It is good to laminate at a speed of 2 m / min.
【００１８】なお、本発明の蛍光板は、上述のように片
面に接着剤層を有する保護膜を蛍光体層表面にラミネー
トするのではなく、支持体上に形成された蛍光体層の表
面に直接接着剤塗布液を塗布し、これを乾燥させておい
て、その上に保護膜を重ねてこれをラミネートすること
によって蛍光体層の表面に保護膜を形成しても製造する
ことはできるが、このようにして製造すると、その蛍光
板を使用する際、保護膜を剥離させた時、蛍光体層表面
に接着剤層が一部残留し、しかもその接着剤の蛍光体表
面への残存量が場所によって不均一となり、画質低下の
一因となるため好ましくない。The fluorescent plate of the present invention does not laminate a protective film having an adhesive layer on one side to the surface of the phosphor layer as described above, but directly lays the surface of the phosphor layer formed on the support. It can also be manufactured by applying an adhesive coating liquid, drying it, forming a protective film on the surface of the phosphor layer by laminating a protective film on top of this, and laminating it. When the phosphor plate is manufactured in this manner, when the protective film is peeled off when the phosphor plate is used, an adhesive layer partially remains on the phosphor layer surface, and the amount of the adhesive remaining on the phosphor surface varies depending on the location. Therefore, the image quality becomes non-uniform and the image quality is reduced.
【００１９】このようにして製造された本発明の蛍光板
は、使用に際しては保護膜を手で引っ張る等の手段で蛍
光体層表面から剥離し、蛍光板の蛍光面が撮像装置内の
光センサーと対峙する位置に固定する。When the fluorescent plate of the present invention thus manufactured is used, the protective film is peeled off from the surface of the phosphor layer by, for example, pulling the protective film by hand, so that the fluorescent surface of the fluorescent plate faces the optical sensor in the imaging device. To a position where
【００２０】図１は本発明の蛍光板を蛍光面に垂直に切
断した時の断面図であり、１は保護膜、２は接着剤層、
３は蛍光体層であり、４は支持体である。また、図２は
本発明の別の実施例の蛍光板の斜視図であるが、図２に
例示したように、蛍光板の保護膜１をその外周部の少な
くとも１ケ所において蛍光体層２の外周の端縁から部分
的に突出した突出片５を設けておき、保護膜１を蛍光体
層３から剥離する際、この突出片５を摘んで保護膜１を
蛍光体層３から剥離するようにすれば保護膜の剥離作業
がより容易になるので好ましい。なお、この突出片５は
図２のように蛍光板の外周部の１ケ所において形成する
のではなく、少なくともその辺全体の保護膜１を蛍光体
層３の端縁から外側へ若干突出させておいてもよい。FIG. 1 is a cross-sectional view of a fluorescent plate of the present invention cut perpendicularly to a fluorescent screen, wherein 1 is a protective film, 2 is an adhesive layer,
3 is a phosphor layer, and 4 is a support. FIG. 2 is a perspective view of a fluorescent screen according to another embodiment of the present invention. As illustrated in FIG. 2, the protective film 1 of the fluorescent screen is provided at least at one location on the outer circumference of the fluorescent layer 2. A protruding piece 5 partially protruding from the edge is provided, and when the protective film 1 is peeled off from the phosphor layer 3, the protruding piece 5 is picked up and the protective film 1 is peeled off from the phosphor layer 3. It is preferable that the work of removing the protective film becomes easier. The protruding piece 5 is not formed at one place on the outer peripheral portion of the fluorescent plate as shown in FIG. 2, but at least the protective film 1 on the entire side is slightly protruded outward from the edge of the phosphor layer 3. May be.
【００２１】このように、本発明の蛍光板は保護膜が蛍
光体層の表面に形成されているので、製造されてから保
管、運送から使用（撮像装置への装着）に至る過程や、
撮像装置への装着のために所望の形状、大きさに裁断す
る際における蛍光体層の汚染や、欠損などが防止される
と共に、使用（撮像装置への装着）に際しては画質に悪
影響を及ぼす保護膜を簡単に蛍光体層から剥離して撮像
装置へ設置出来るので、画質の良好な蛍光板を供給出来
る。As described above, since the protective plate is formed on the surface of the phosphor layer in the phosphor plate of the present invention, the process from production, storage, transportation to use (attachment to the imaging device),
Prevents contamination and loss of the phosphor layer when cutting into a desired shape and size for mounting on an imaging device, and protects the image quality when used (mounted on the imaging device). Since the film can be easily peeled off from the phosphor layer and installed on the image pickup device, a fluorescent plate with good image quality can be supplied.
【００２２】[0022]
【実施例】〔実施例１〕３３．２重量部のポリエステル
樹脂（接着剤樹脂：日本合成化学社製；ポリエスターＴ
Ｐ２２０とポリエスターＬＰ０３３との混合物）と、６
６．４重量部の酢酸エチル並びに酢酸ブチルの混合液
（溶剤）と０．４重量部のイソシアネート樹脂（硬化
剤：三菱化学社製；マイテックＮＹ２２０Ａ）とを十分
に混合して接着剤塗布液を調製し、バーコーターを用い
てこの接着剤塗布液を厚さ９μｍの透明なＰＥＴフイル
ム上に塗布し、次いで乾燥して乾燥後の膜厚がおよそ１
μｍの接着剤層が片面に形成された保護膜を製造した。EXAMPLES Example 1 33.2 parts by weight of a polyester resin (adhesive resin: manufactured by Nippon Synthetic Chemical Company; Polyester T)
A mixture of P220 and Polyester LP033), 6
6.4 parts by weight of a mixed solution (solvent) of ethyl acetate and butyl acetate and 0.4 parts by weight of an isocyanate resin (hardening agent: manufactured by Mitsubishi Chemical Corporation; Mytec NY220A) are sufficiently mixed to apply an adhesive coating solution. Was prepared and applied to a 9 μm-thick transparent PET film using a bar coater, and then dried to a film thickness of about 1 after drying.
A protective film having a μm adhesive layer formed on one side was manufactured.
【００２３】また、これとは別にポリビニルブチラール
樹脂（結合剤樹脂）とトルエン並びにキシレンの混合有
機溶剤と少量の可塑剤とからなる結合剤を調製し、Ｇｄ
２Ｏ２Ｓ：Ｔｂ蛍光体（Ｘ線用蛍光体）１００重量部と
上記結合剤２３重量部とを混合して蛍光体塗布液を製造
し、この蛍光体塗布液を酸化チタンが練り込まれた厚さ
１９０μｍの白色ＰＥＴからなる支持体上に、乾燥後の
膜厚がおよそ４５ｍｇ／ｃｍ２となるように塗布し、乾
燥して支持体上に蛍光体層を形成した。Separately, a binder comprising a mixed solvent of polyvinyl butyral resin (binder resin), toluene and xylene and a small amount of a plasticizer is prepared.
100 parts by weight of 2 O 2 S: Tb phosphor (X-ray phosphor) and 23 parts by weight of the binder are mixed to produce a phosphor coating solution, and titanium oxide is kneaded into the phosphor coating solution. It was coated on a support made of white PET having a thickness of 190 μm and dried so as to have a film thickness of about 45 mg / cm 2, and dried to form a phosphor layer on the support.
【００２４】上述のようにして製造された、片面に蛍光
体層が形成された支持体と片面に接着剤層が形成された
保護膜とを、蛍光体層と接着剤層とが対峙するようにし
て重ね、７５℃に加熱されているロール間を通過させ
て、線圧２６ｋｇ／ｃｍに加圧してこの両者をラミネー
トし、実施例１の蛍光板を製造した。The support having the phosphor layer formed on one side and the protective film having the adhesive layer formed on one side are manufactured in the manner described above so that the phosphor layer and the adhesive layer face each other. Then, the sheet was passed between rolls heated to 75 ° C., and was pressurized to a linear pressure of 26 kg / cm, and both were laminated to produce a phosphor plate of Example 1.
【００２５】上述のようにして得られた実施例１の蛍光
板を幅２０ｍｍの短冊状に裁断し、万能引っ張り試験機
（株式会社 東洋ボールドウイン社製、ＳＴＭ−Ｔ−５
０）を使用してこの蛍光板の短冊の蛍光体層が設けられ
た支持体と保護膜とを１８０゜の方向に３０ｍｍ／分の
スピードで引っ張り、その引き剥がし接着力を測定した
ところ、５０ｇ／（２０ｍｍ）であった。The fluorescent plate of Example 1 obtained as described above was cut into a strip having a width of 20 mm, and a universal tensile tester (STM-T-5 manufactured by Toyo Baldwin Co., Ltd.) was used.
Using 0), the support provided with the strip phosphor layers of the phosphor plate and the protective film were pulled in the direction of 180 ° at a speed of 30 mm / min, and the peeling adhesion was measured. (20 mm).
【００２６】この蛍光板は保護膜の端部を指で４〜５回
擦り上げてみたところ、保護膜は剥離しなかったが、指
で擦り上げた部分にセロハンテープを貼付し、ついでこ
れを引っ張ったところ蛍光体層表面に損傷を与えること
なく簡単に剥離し、適度な接着力を有していた。When the end of the protective film of this phosphor plate was rubbed with a finger four to five times, the protective film was not peeled off, but a cellophane tape was stuck to the portion rubbed with the finger, and then this was pulled. As a result, it was easily peeled without damaging the phosphor layer surface, and had an appropriate adhesive strength.
【００２７】〔実施例２〕実施例１と同様にして透明な
ＰＥＴの片面に、乾燥後の膜厚がおよそ１μｍの接着剤
層を設けた形成された保護膜と、酸化チタンが練り込ま
れた厚さ１９０μｍの白色ＰＥＴからなる支持体上に、
乾燥後の膜厚がおよそ４５ｍｇ／ｃｍ２であるＧｄ２Ｏ
２Ｓ：Ｔｂ蛍光体からなる蛍光体層を形成した。Example 2 In the same manner as in Example 1, a protective film formed by providing an adhesive layer having a thickness of about 1 μm after drying on one surface of transparent PET, and titanium oxide were kneaded. On a support made of white PET having a thickness of 190 μm,
Gd 2 O having a film thickness after drying of about 45 mg / cm 2
A phosphor layer made of 2S: Tb phosphor was formed.
【００２８】次いで、上述の保護膜と蛍光体層が設けら
れた支持体とを保護膜の接着剤層面と蛍光体層面とを対
峙させ、かつ、保護膜の一端辺がこの辺に対応する蛍光
体層の端辺よりもおよそ１ｃｍ程度外側へはみ出した状
態で重ねあわせて８０℃に加熱されているロール間を通
過させて、線圧２６ｋｇ／ｃｍに加圧してこの両者をラ
ミネートし、保護膜の蛍光体層の一端面から外側へはみ
出している部分の中、角部付近のおよそ２ｃｍを残して
蛍光体層端面に沿って切断し、その外観が図２に示され
るような、端縁部に突出片５を有する実施例２の蛍光板
を製造した。Next, the above-mentioned protective film and the support provided with the phosphor layer are placed such that the adhesive layer surface and the phosphor layer surface of the protective film face each other, and one end of the protective film corresponds to this side. The layers are overlapped so as to protrude about 1 cm outward from the edge of the layer, passed between rolls heated to 80 ° C., pressurized to a linear pressure of 26 kg / cm, and both are laminated to form a protective film. In the portion protruding outward from one end face of the phosphor layer, cut along the end face of the phosphor layer except for about 2 cm near the corner, and the appearance is cut at the edge as shown in FIG. The phosphor plate of Example 2 having the protruding pieces 5 was manufactured.
【００２９】上述のようにして得られた実施例２の蛍光
板を、突出片５を含む部分を幅２０ｍｍの短冊状に裁断
し、万能引っ張り試験機（株式会社 東洋ボールドウイ
ン社製、ＳＴＭ−Ｔ−５０）を使用してこの蛍光板の短
冊の蛍光体層が設けられた支持体と保護膜（突出片５の
部分）とを１８０゜の方向に３０ｍｍ／分のスピードで
引っ張り、その引き剥がし接着力を測定したところ、９
０ｇ／（２０ｍｍ）であった。The fluorescent plate of Example 2 obtained as described above was cut into strips having a width of 20 mm at the portion including the protruding pieces 5 and a universal tensile tester (STM-T, manufactured by Toyo Baldwin Co., Ltd.) Using -50), the support provided with the strip phosphor layers of the phosphor plate and the protective film (the portion of the protruding piece 5) are pulled in the direction of 180 ° at a speed of 30 mm / min, and peeled off and adhered. When the force was measured, 9
It was 0 g / (20 mm).
【００３０】この蛍光板は保護膜の端部を指で４〜５回
擦り上げてみたところ、保護膜は剥離しなかったが、保
護膜の突出部５を引っ張ったところ簡単に剥離すること
ができ、適度な接着力を有していた。When the end of the protective film was rubbed with a finger four to five times, the protective film did not peel off. However, when the protrusion 5 of the protective film was pulled, it could be easily peeled off. Had a moderate adhesive strength.
【００３１】〔比較例１〕片面に蛍光体層が形成された
支持体と片面に接着剤層が形成された保護膜とを７５℃
ではなく８５℃に加熱されているロール間を通過さてラ
ミネートした以外は実施例１の蛍光板と同様にして比較
例１の蛍光板を製造した。Comparative Example 1 A support having a phosphor layer formed on one side and a protective film having an adhesive layer formed on one side were heated at 75 ° C.
Instead, the phosphor plate of Comparative Example 1 was manufactured in the same manner as the phosphor plate of Example 1 except that the laminate was passed between rolls heated to 85 ° C. and laminated.
【００３２】このようにして得られた比較例１の蛍光板
について、実施例１と同様にして蛍光体層と保護膜との
引き剥がし接着力を測定したところ、１３０ｇ／２０ｍ
ｍであったWith respect to the phosphor plate of Comparative Example 1 thus obtained, the peel strength between the phosphor layer and the protective film was measured in the same manner as in Example 1, and the result was 130 g / 20 m.
m
【００３３】この蛍光板は実施例１と同様にして保護膜
の端部にセロハンテープを貼付し、これを引っ張って
も、保護膜は剥離せず、保護膜は強固に蛍光体層と接着
していた。In this fluorescent plate, a cellophane tape is stuck to the end of the protective film in the same manner as in Example 1, and the protective film is not peeled off even when pulled, and the protective film is firmly adhered to the phosphor layer. Was.
【００３４】〔比較例２〕片面に蛍光体層が形成された
支持体と片面に接着剤層が形成された保護膜とを７５℃
ではなく６０℃に加熱されているロール間を通過さてラ
ミネートした以外は実施例１の蛍光板と同様にして比較
例２の蛍光板を製造した。Comparative Example 2 A support having a phosphor layer formed on one side and a protective film having an adhesive layer formed on one side were heated at 75 ° C.
Instead, a phosphor plate of Comparative Example 2 was manufactured in the same manner as the phosphor plate of Example 1 except that the laminate was passed between rolls heated to 60 ° C. and laminated.
【００３５】このようにして得られた比較例２の蛍光板
について、実施例１と同様にして蛍光体層と保護膜との
引き剥がし接着力を測定したところ、３０ｇ／２０ｍｍ
であった。With respect to the phosphor plate of Comparative Example 2 thus obtained, the peel strength between the phosphor layer and the protective film was measured in the same manner as in Example 1, and the result was 30 g / 20 mm.
Met.
【００３６】この蛍光板は実施例１の蛍光板と同様にし
て保護膜の端部を指で４〜５回擦り上げてみたところ、
保護膜は簡単に剥離し、蛍光体層と保護膜との接着は不
十分であった。When the end of the protective film was rubbed 4 to 5 times with a finger in the same manner as in the first embodiment,
The protective film was easily peeled off, and the adhesion between the phosphor layer and the protective film was insufficient.
【００３７】[0037]
【発明の効果】本発明は上述のような構成としたので、
使用直前まで蛍光体層の汚れ付着や欠落が防止出来ると
共に、使用に際しても蛍光体層の汚れや欠落を生じさせ
ることなく保護膜の剥離が簡単に行えて、画質の良好な
蛍光板を提供することが出来る。Since the present invention has the above-described configuration,
Provide a phosphor plate with good image quality, which can prevent the phosphor layer from being stained or dropped immediately before use, and can easily peel off the protective film without causing the phosphor layer to be stained or dropped during use. Can be done.
【００３８】[0038]
【図面の簡単な説明】[Brief description of the drawings]
【図１】は本発明の蛍光板の断面図である。FIG. 1 is a cross-sectional view of a phosphor plate of the present invention.
【図２】は本発明の蛍光板の一実施例を示す斜視図であ
る。 １…………保護膜 ２…………接着剤層 ３…………蛍光体層 ４…………支持体 ５…………突出片FIG. 2 is a perspective view showing one embodiment of the fluorescent plate of the present invention. DESCRIPTION OF SYMBOLS 1 ... Protective film 2 ... Adhesive layer 3 ... Phosphor layer 4 ... Support 5 ... Protruding piece
Claims (2)
体からなる蛍光体層、接着剤層及び保護膜をこの順序に
積層してなり、上記蛍光体層と上記保護膜との間の引き
剥がし接着力が室温下において４０〜１００ｇ／（２０
ｍｍ幅）であることを特徴とする蛍光板。1. A support, a phosphor layer made of a phosphor dispersed in a binder resin, an adhesive layer, and a protective film are laminated in this order, and a laminate is formed between the phosphor layer and the protective film. Has a peel adhesion of 40 to 100 g / (20 at room temperature).
mm width).
の外周端縁から突出した突出片を有していることを特徴
とする請求項１に記載の蛍光板。2. The phosphor plate according to claim 1, further comprising a projecting piece projecting from an outer edge of the phosphor layer at an outer edge of the protective film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11124704A JP2000275398A (en) | 1999-03-26 | 1999-03-26 | Fluorescent screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11124704A JP2000275398A (en) | 1999-03-26 | 1999-03-26 | Fluorescent screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000275398A true JP2000275398A (en) | 2000-10-06 |
Family
ID=14892044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11124704A Pending JP2000275398A (en) | 1999-03-26 | 1999-03-26 | Fluorescent screen |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000275398A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004138440A (en) * | 2002-10-16 | 2004-05-13 | Konica Minolta Holdings Inc | Radiation image transducer panel |
| JP2006078472A (en) * | 2004-08-10 | 2006-03-23 | Canon Inc | Radiation detector, scintillator panel, and manufacturing methods therefor |
| JP2006078471A (en) * | 2004-08-10 | 2006-03-23 | Canon Inc | Radiation detection instrument, scintillator panel, their manufacturing methods, and radiation detection system |
| JP2010256373A (en) * | 2004-08-10 | 2010-11-11 | Canon Inc | Device and system for detection of radiation |
-
1999
- 1999-03-26 JP JP11124704A patent/JP2000275398A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004138440A (en) * | 2002-10-16 | 2004-05-13 | Konica Minolta Holdings Inc | Radiation image transducer panel |
| JP2006078472A (en) * | 2004-08-10 | 2006-03-23 | Canon Inc | Radiation detector, scintillator panel, and manufacturing methods therefor |
| JP2006078471A (en) * | 2004-08-10 | 2006-03-23 | Canon Inc | Radiation detection instrument, scintillator panel, their manufacturing methods, and radiation detection system |
| JP2010256373A (en) * | 2004-08-10 | 2010-11-11 | Canon Inc | Device and system for detection of radiation |
| JP4594188B2 (en) * | 2004-08-10 | 2010-12-08 | キヤノン株式会社 | Radiation detection apparatus and radiation detection system |
| JP4612876B2 (en) * | 2004-08-10 | 2011-01-12 | キヤノン株式会社 | Radiation detection apparatus, scintillator panel, manufacturing method thereof, and radiation detection system |
| JP4671449B2 (en) * | 2004-08-10 | 2011-04-20 | キヤノン株式会社 | Radiation detection apparatus and radiation detection system |
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