JP2002131474A - Radiation shielding material - Google Patents
Radiation shielding materialInfo
- Publication number
- JP2002131474A JP2002131474A JP2000320758A JP2000320758A JP2002131474A JP 2002131474 A JP2002131474 A JP 2002131474A JP 2000320758 A JP2000320758 A JP 2000320758A JP 2000320758 A JP2000320758 A JP 2000320758A JP 2002131474 A JP2002131474 A JP 2002131474A
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- radiation shielding
- shielding material
- mass
- polyolefin resin
- average molecular
- Prior art date
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、新規な放射線遮蔽
材に関し、更に詳しくは施工性に富み、優れたＸ線また
はγ線遮蔽性能を有する放射線遮蔽材に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel radiation shielding material, and more particularly, to a radiation shielding material having excellent workability and excellent X-ray or γ-ray shielding performance.
【０００２】[0002]
【従来の技術】従来、原子炉、加速器、医療機器、放射
線源等から出る放射線からの人体防護あるいは計器類の
保護、測定器のバックグラウンド放射線の低減等を目的
として、放射線遮蔽材が使用されている。特に、病院で
のＸ線治療に関与する人、あるいは放射性物質を取り扱
う人等の被爆防護としての遮蔽材は、塩化ビニル樹脂、
ゴム等に鉛粉末を混入させた材料より加工されたものが
現在主流である。2. Description of the Related Art Conventionally, radiation shielding materials have been used for the purpose of protecting the human body from radiation emitted from nuclear reactors, accelerators, medical equipment, radiation sources, etc., protecting instruments and reducing background radiation of measuring instruments. ing. In particular, shielding materials used as protection for people exposed to X-ray therapy in hospitals or those who handle radioactive materials are vinyl chloride resin,
What is processed from the material which mixed lead powder in rubber etc. is the mainstream now.
【０００３】また、Ｘ線のエネルギーが６０ｋｅｖ近辺
では、鉛に比べバリウムの方が遮蔽効率が大であり、バ
リウムは有効な放射線遮蔽材料といえる。例えば、特開
平１１−１３３１８４号公報には、密度が０．８４〜
０．９２ｇ／ｃｍ3の範囲内にあり、メルトフローレー
ト（ＭＦＲ）が０．１〜５０ｇ／１０分の範囲内にあ
り、重量平均分子量（Ｍｗ）と数平均分子量（Ｍｎ）の
比（Ｍｗ／Ｍｎ）が３以下のポリオレフィン樹脂１００
重量部に対して、バリウム化合物中のバリウム量として
１０〜５００重量部を添加配合してなることを特徴とす
る放射線遮蔽材が開示されている。[0003] When the energy of X-rays is around 60 keV, barium has a higher shielding efficiency than lead, and barium can be said to be an effective radiation shielding material. For example, Japanese Patent Application Laid-Open No. 11-133184 discloses that the density is 0.84 to 0.84.
The melt flow rate (MFR) is in the range of 0.1 to 50 g / 10 minutes, and the ratio (Mw) between the weight average molecular weight (Mw) and the number average molecular weight (Mn) is in the range of 0.92 g / cm 3. / Mn) 3 or less polyolefin resin 100
There is disclosed a radiation shielding material characterized in that 10 to 500 parts by weight of barium in a barium compound is added to and blended with respect to parts by weight.
【０００４】[0004]
【発明が解決しようとする課題】上記公報に開示されて
いる放射線遮蔽材は施工性に富むものであるが、該放射
線遮蔽材をグローブボックスの開口部の蓋部材等として
使用すると、施工性が不足し、はめ込み作業等の施工性
に支障を生ずる場合があり、より一層の施工性を有する
放射線遮蔽材が求められている。The radiation shielding material disclosed in the above publication is rich in workability. However, when the radiation shield material is used as a lid member for an opening of a glove box, the workability is insufficient. In some cases, the workability of the work such as fitting work may be hindered, and a radiation shielding material having more workability is required.
【０００５】従って、本発明の目的は、スズ化合物をポ
リオレフィン樹脂に添加し、施工性に富んだ放射線遮蔽
材を提供することにある。Accordingly, an object of the present invention is to provide a radiation shielding material which is rich in workability by adding a tin compound to a polyolefin resin.
【０００６】[0006]
【課題を解決するための手段】即ち、本発明の放射線遮
蔽材は、密度が０．８４〜０．９２ｇ／ｃｍ3の範囲内
にあり、メルトフローレート（ＭＦＲ）が０．１〜５０
ｇ／１０分の範囲内にあり、質量平均分子量（Ｍｗ）と
数平均分子量（Ｍｎ）の比（Ｍｗ／Ｍｎ）が３以下のポ
リオレフィン樹脂１５〜３６質量％及びスズ化合物６４
〜８５質量％とからなることを特徴とする。That is, the radiation shielding material of the present invention has a density in the range of 0.84 to 0.92 g / cm 3 and a melt flow rate (MFR) of 0.1 to 50.
g / 10 minutes, and the ratio (Mw / Mn) of the weight average molecular weight (Mw) to the number average molecular weight (Mn) is 3 to less than 15 to 36% by mass of a polyolefin resin and tin compound 64.
８５85% by mass.
【０００７】また、本発明の放射線遮蔽材は、ポリオレ
フィン樹脂がメタロセン触媒を用いて製造された樹脂で
あることを特徴とする。Further, the radiation shielding material of the present invention is characterized in that the polyolefin resin is a resin produced using a metallocene catalyst.
【０００８】更に、本発明の放射線遮蔽材は、スズ化合
物が二酸化スズであることを特徴とする。Further, the radiation shielding material of the present invention is characterized in that the tin compound is tin dioxide.
【０００９】また、本発明の放射線遮蔽材は、酸化防止
剤、滑剤、帯電防止剤、耐候剤及び充填材からなる群か
ら選択される１種または２種以上の成分を含有してなる
ことを特徴とする。Further, the radiation shielding material of the present invention comprises one or more components selected from the group consisting of antioxidants, lubricants, antistatic agents, weathering agents and fillers. Features.
【００１０】[0010]
【発明の実施の形態】本発明の放射線遮蔽材に使用する
ポリオレフィン樹脂は、密度が０．８４〜０．９２ｇ／
ｃｍ3の範囲内にあり、メルトフローレート（ＭＦＲ）
が０．１〜５０ｇ／１０分の範囲内にあり、質量平均分
子量（Ｍｗ）と数平均分子量（Ｍｎ）の比（Ｍｗ／Ｍ
ｎ）が３以下のものであり、例えば、メタロセン触媒を
用いて製造されたメタロセン触媒系ポリオレフィン樹脂
やバナジウム触媒を用いて製造されたバナジウム触媒系
ポリオレフィン樹脂を使用することができ、特にメタロ
セン樹脂系ポリオレフィン樹脂が好ましい。DESCRIPTION OF THE PREFERRED EMBODIMENTS The polyolefin resin used in the radiation shielding material of the present invention has a density of 0.84 to 0.92 g /.
Melt flow rate (MFR) within cm 3
Is in the range of 0.1 to 50 g / 10 min, and the ratio (Mw / M) of the mass average molecular weight (Mw) to the number average molecular weight (Mn) is
n) is 3 or less, for example, a metallocene-catalyzed polyolefin resin produced using a metallocene catalyst or a vanadium-catalyzed polyolefin resin produced using a vanadium catalyst can be used. Polyolefin resins are preferred.
【００１１】ここで、ポリオレフィン樹脂の密度が０．
９２ｇ／ｃｍ3を超えると施工性が損なわれるために好
ましくなく、また、密度が０．８４ｇ／ｃｍ3未満であ
ると耐熱性が低下するために好ましくない。なお、放射
線遮蔽材の樹脂、加工性並びにゴム特性を考慮すると、
密度は０．８６〜０．９０ｇ／ｃｍ3の範囲内が特に好
ましい。また、ポリオレフィン樹脂のメルトフローレー
ト（ＭＦＲ）が５０ｇ／１０分を超えると強度が低下す
るために好ましくなく、また、ＭＦＲが０．１ｇ／１０
分未満であると加工性が劣るために好ましくない。更
に、ポリオレフィン樹脂の質量平均分子量（Ｍｗ）と数
平均分子量（Ｍｎ）の比（Ｍｗ／Ｍｎ）が３を超えると
強度が低下するために好ましくない。[0011] Here, the density of the polyolefin resin is 0.1.
If it exceeds 92 g / cm 3 , it is not preferable because workability is impaired, and if it is less than 0.84 g / cm 3 , heat resistance is undesirably reduced. In addition, considering the resin, processability and rubber properties of the radiation shielding material,
The density is particularly preferably in the range of 0.86 to 0.90 g / cm 3 . Further, if the melt flow rate (MFR) of the polyolefin resin exceeds 50 g / 10 minutes, the strength decreases, which is not preferable, and the MFR is 0.1 g / 10 min.
If it is less than minutes, the processability is inferior, which is not preferable. Further, if the ratio (Mw / Mn) of the mass average molecular weight (Mw) to the number average molecular weight (Mn) of the polyolefin resin exceeds 3, the strength decreases, which is not preferable.
【００１２】また、本発明の放射線遮蔽材に使用するス
ズ化合物としては例えば二酸化スズを使用することがで
きるが、本発明に使用するスズ化合物は二酸化スズに限
定されるものではない。なお、スズ化合物の配合量は多
ければ多い程、遮蔽効果は大であるが、放射線遮蔽材の
諸特性例えば施工性、加工性、ゴム特性等を考慮すると
ポリオレフィン樹脂１５〜３６質量％対してスズ化合物
６４〜８５重量％の範囲内、即ち、スズ化合物として二
酸化スズを使用する場合、スズ元素換算量として５０〜
６６質量％の範囲内が適当である。ここで、スズ化合物
の配合量が６４質量％未満、即ち、スズ元素換算量とし
て５０質量％未満であると、放射線遮蔽効果が少なくな
るために好ましくなく、また、８５質量％を超えると、
即ち、スズ元素換算量として６６質量％を超えると放射
線遮蔽材の諸特性、特に機械的特性に悪影響を及ぼすた
めに好ましくない。As the tin compound used in the radiation shielding material of the present invention, for example, tin dioxide can be used, but the tin compound used in the present invention is not limited to tin dioxide. The more the compounding amount of the tin compound, the greater the shielding effect. However, in consideration of various properties of the radiation shielding material, such as workability, workability, rubber properties, etc., the tin content of the polyolefin resin is 15 to 36% by mass. When the content of the compound is in the range of 64 to 85% by weight, that is, when tin dioxide is used as the tin compound, 50 to 50%
The range of 66% by mass is appropriate. Here, when the compounding amount of the tin compound is less than 64% by mass, that is, less than 50% by mass in terms of tin element, the radiation shielding effect is reduced, which is not preferable.
That is, if the amount exceeds 66% by mass in terms of tin element, various characteristics of the radiation shielding material, particularly, mechanical characteristics are adversely affected, which is not preferable.
【００１３】更に、本発明の放射線遮蔽材には、添加剤
として酸化防止剤、滑剤、帯電防止剤、耐候剤等を、充
填材として炭酸カルシウム、タルク、マイカ、グラスフ
ァイバー等を必要に応じて加えることもできる。なお、
これらの成分を配合する場合、その配合量は、２０質量
％以下（ゼロを含まず）の範囲内で、且つスズ化合物と
の合計量で６４〜８５質量％の範囲内とすることが好ま
しい。Further, the radiation shielding material of the present invention contains an antioxidant, a lubricant, an antistatic agent, a weathering agent and the like as additives, and calcium carbonate, talc, mica, glass fiber and the like as a filler if necessary. Can be added. In addition,
When these components are blended, the blending amount is preferably within a range of 20% by mass or less (not including zero) and in a range of 64 to 85% by mass in total with the tin compound.
【００１４】[0014]
【実施例】以下に実施例を挙げて本発明の放射線遮蔽材
を更に説明する。 実施例１ 密度０．８８ｇ／ｃｍ3、ＭＦＲ５ｇ／１０分、Ｍｗ／
Ｍｎ＝２を有するメタロセン触媒系ポリエチレン樹脂
２．１９ｋｇに対して二酸化スズ３．８１ｋｇを加え、
加圧型ニーダーを用いて温度８０℃で１５分間混練し
た。冷却後取り出した混合材料を１２０〜１３０℃の加
熱ロールで厚さ２〜３ｍｍのシートに圧延し、更に、こ
の圧延シートを温度１５５〜１６０℃の熱プレスにて厚
さ２ｍｍとなるように加圧成形することによりシート状
の放射線遮蔽材（スズ元素換算量５０質量％）を得た。
得られた放射線遮蔽材の諸特性を表１に併記する。EXAMPLES The radiation shielding material of the present invention will be further described below with reference to examples. Example 1 Density 0.88 g / cm 3 , MFR 5 g / 10 min, Mw /
3.81 kg of tin dioxide was added to 2.19 kg of a metallocene-catalyzed polyethylene resin having Mn = 2,
The mixture was kneaded at a temperature of 80 ° C. for 15 minutes using a pressure kneader. After cooling, the mixed material taken out is rolled into a sheet having a thickness of 2 to 3 mm by a heating roll at 120 to 130 ° C., and the rolled sheet is heated to a thickness of 2 mm by a hot press at a temperature of 155 to 160 ° C. A sheet-shaped radiation shielding material (50% by mass in terms of tin element) was obtained by pressing.
Table 1 also shows various characteristics of the obtained radiation shielding material.
【００１５】実施例２ 密度０．８８ｇ／ｃｍ3、ＭＦＲ５ｇ／１０分、Ｍｗ／
Ｍｎ＝２を有するメタロセン触媒系ポリエチレン樹脂
１．９２ｋｇに対して二酸化スズ４．０８ｋｇを加え、
加圧型ニーダーを用いて温度８０℃で１５分間混練し
た。冷却後取り出した混合材料を１２０〜１３０℃の加
熱ロールで厚さ２〜３ｍｍのシートに圧延し、更に、こ
の圧延シートを温度１５５〜１６０℃の熱プレスにて厚
さ２ｍｍとなるように加圧成形することによりシート状
の放射線遮蔽材（スズ元素換算量５３質量％）を得た。
得られた放射線遮蔽材の諸特性を表１に併記する。Example 2 Density: 0.88 g / cm 3 , MFR: 5 g / 10 min, Mw /
4.08 kg of tin dioxide was added to 1.92 kg of a metallocene-catalyzed polyethylene resin having Mn = 2,
The mixture was kneaded at a temperature of 80 ° C. for 15 minutes using a pressure kneader. After cooling, the mixed material taken out is rolled into a sheet having a thickness of 2 to 3 mm by a heating roll at 120 to 130 ° C., and the rolled sheet is heated to a thickness of 2 mm by a hot press at a temperature of 155 to 160 ° C. A sheet-shaped radiation shielding material (53% by mass in terms of tin element) was obtained by pressing.
Table 1 also shows various characteristics of the obtained radiation shielding material.
【００１６】実施例３ 密度０．８８ｇ／ｃｍ3、ＭＦＲ５ｇ／１０分、Ｍｗ／
Ｍｎ＝２を有するメタロセン触媒系ポリエチレン樹脂
１．２０ｋｇに対して二酸化スズ４．８０ｋｇを加え、
加圧型ニーダーを用いて温度８０℃で１５分間混練し
た。冷却後取り出した混合材料を１２０〜１３０℃の加
熱ロールで厚さ２〜３ｍｍのシートに圧延し、更に、こ
の圧延シートを温度１５５〜１６０℃の熱プレスにて厚
さ２ｍｍとなるように加圧成形することによりシート状
の放射線遮蔽材（スズ元素換算量６３質量％）を得た。
得られた放射線遮蔽材の諸特性を表１に併記する。Example 3 Density: 0.88 g / cm 3 , MFR: 5 g / 10 min, Mw /
4.20 kg of tin dioxide was added to 1.20 kg of a metallocene-catalyzed polyethylene resin having Mn = 2,
The mixture was kneaded at a temperature of 80 ° C. for 15 minutes using a pressure kneader. After cooling, the mixed material taken out is rolled into a sheet having a thickness of 2 to 3 mm by a heating roll at 120 to 130 ° C., and the rolled sheet is heated to a thickness of 2 mm by a hot press at a temperature of 155 to 160 ° C. By pressing, a sheet-shaped radiation shielding material (63% by mass in terms of tin element) was obtained.
Table 1 also shows various characteristics of the obtained radiation shielding material.
【００１７】実施例４ 密度０．８８ｇ／ｃｍ3、ＭＦＲ５ｇ／１０分、Ｍｗ／
Ｍｎ＝２を有するメタロセン触媒系ポリエチレン樹脂
０．９０ｋｇに対して二酸化スズ５．１ｋｇを加え、加
圧型ニーダーを用いて温度８０℃で１５分間混練した。
冷却後取り出した混合材料を１２０〜１３０℃の加熱ロ
ールで厚さ２〜３ｍｍのシートに圧延し、更に、この圧
延シートを温度１５５〜１６０℃の熱プレスにて厚さ２
ｍｍとなるように加圧成形することによりシート状の放
射線遮蔽材（スズ元素換算量６６質量％）を得た。得ら
れた放射線遮蔽材の諸特性を表１に併記する。Example 4 Density: 0.88 g / cm 3 , MFR: 5 g / 10 min, Mw /
To 0.90 kg of a metallocene-catalyzed polyethylene resin having Mn = 2, 5.1 kg of tin dioxide was added and kneaded at a temperature of 80 ° C. for 15 minutes using a pressure kneader.
After cooling, the mixed material taken out was rolled into a sheet having a thickness of 2 to 3 mm by a heating roll at 120 to 130 ° C., and the rolled sheet was hot-pressed at a temperature of 155 to 160 ° C. to a thickness of 2 mm.
The sheet was subjected to pressure molding to obtain a sheet-like radiation shielding material (tin element equivalent: 66% by mass). Table 1 also shows various characteristics of the obtained radiation shielding material.
【００１８】比較例 実施例１ 密度０．８８ｇ／ｃｍ3、ＭＦＲ５ｇ／１０分、Ｍｗ／
Ｍｎ＝２を有するメタロセン触媒系ポリエチレン樹脂
０．９０ｋｇに対して硫酸バリウム５．１０ｋｇを加
え、加圧型ニーダーを用いて温度８０℃で１５分間混練
した。冷却後取り出した混合材料を１２０〜１３０℃の
加熱ロールで厚さ２〜３ｍｍのシートに圧延し、更に、
この圧延シートを温度１５５〜１６０℃の熱プレスにて
厚さ２ｍｍとなるように加圧成形することによりシート
状の放射線遮蔽材（バリウム元素換算量５０質量％）を
得た。得られた放射線遮蔽材の諸特性を表１に併記す
る。Comparative Example Example 1 Density 0.88 g / cm 3 , MFR 5 g / 10 min, Mw /
5.10 kg of barium sulfate was added to 0.90 kg of a metallocene-catalyzed polyethylene resin having Mn = 2, and kneaded at a temperature of 80 ° C. for 15 minutes using a pressure kneader. The mixed material taken out after cooling is rolled into a sheet having a thickness of 2 to 3 mm by a heating roll at 120 to 130 ° C., and further,
The rolled sheet was pressure-formed to a thickness of 2 mm by a hot press at a temperature of 155 to 160 ° C. to obtain a sheet-shaped radiation shielding material (50 mass% in terms of barium element). Table 1 also shows various characteristics of the obtained radiation shielding material.
【００１９】[0019]
【表１】 [Table 1]
【００２０】なお、表１中、引張強さ及び引張伸びはＪ
ＩＳ Ｋ７１１３プラスチックの引張試験方法に従って
測定した結果であり、硬度はＪＩＳ Ｋ６３０１スプリ
ング式硬さ試験法に従って測定した結果であり、遮蔽性
はＪＩＳ Ｚ４５０１鉛当量試験法に従って測定した結
果である。In Table 1, the tensile strength and tensile elongation are J
The results are measured according to the tensile test method of IS K7113 plastic, the hardness is measured according to JIS K6301 spring hardness test method, and the shielding property is the result measured according to JIS Z4501 lead equivalent test method.
【００２１】更に、上記実施例１ないし４並びに比較例
と同じ配合を有する配合物から図１に示す形状のグロー
ブボックス用蓋部材（１）を作製し、図１に示すように
グローブボード（２）の開口部（３）へグローブボック
ス用蓋部材（１）を押し込むことにより取り付け、その
際の取り付け容易性について検討した。なお、グローブ
ボックス用蓋部材（１）の口径（溝部の頂点の口径）は
２９１ｍｍであり、開口部（３）の口径は２８７ｍｍで
ある。得られた結果を施工性として表１に併記する。な
お、表１中、◎は取り付けが非常に容易である、○は取
り付けが容易である、×は取り付けが不能である、をそ
れぞれ示す。Further, a lid member (1) for a glove box having a shape shown in FIG. 1 was prepared from a composition having the same composition as in the above Examples 1 to 4 and Comparative Example, and as shown in FIG. The glove box cover member (1) was pushed into the opening (3) of (3) to attach the glove box, and the ease of attachment at that time was examined. The diameter of the glove box cover member (1) (the diameter at the top of the groove) is 291 mm, and the diameter of the opening (3) is 287 mm. The obtained results are also shown in Table 1 as workability. In Table 1, ◎ indicates that the attachment is very easy, ○ indicates that the attachment is easy, and X indicates that the attachment is impossible.
【００２２】[0022]
【発明の効果】上述のようにして得られた本発明の放射
線遮蔽材は、加工が容易な材質であり、施工性に富むと
共に優れた放射線遮蔽性能を有する。The radiation shielding material of the present invention obtained as described above is a material that can be easily processed, has excellent workability, and has excellent radiation shielding performance.
【図１】本発明の放射線遮蔽材をグローブボックス用蓋
部材として使用した場合の施工性を検討するために使用
した装置の概略図である。FIG. 1 is a schematic view of an apparatus used for examining workability when a radiation shielding material of the present invention is used as a glove box lid member.
１ グローブボックス用蓋部材 ２ グローブボード ３ 開口部 DESCRIPTION OF SYMBOLS 1 Cover member for glove box 2 Glove board 3 Opening
───────────────────────────────────────────────────── フロントページの続き (72)発明者 藤木 昇 神奈川県横浜市鶴見区鶴見中央２丁目５番 ５号 アスク・サンシンエンジニアリング 株式会社内 (72)発明者 市野 隆行 神奈川県横浜市鶴見区鶴見中央２丁目５番 ５号 アスク・サンシンエンジニアリング 株式会社内 (72)発明者 小笠原 隆 三重県四日市市別名１−18−１ Ｆターム(参考） 4J002 BB031 DE096 DE237 DJ047 DJ057 DL007 FA047 FD017 FD070 FD100 FD170 GT00 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Noboru Fujiki 2-5-5, Tsurumichuo, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture Inside of Ask Sanshin Engineering Co., Ltd. (72) Inventor Takayuki Ichino Tsurumichuo, Tsurumi-ku, Yokohama-shi, Kanagawa 2-5-5, Ask Sanshin Engineering Co., Ltd. (72) Inventor Takashi Ogasawara, Yokkaichi, Mie 1-18-1 F term (reference) 4J002 BB031 DE096 DE237 DJ047 DJ057 DL007 FA047 FD017 FD070 FD100 FD170 GT00
Claims (4)
範囲内にあり、メルトフローレート（ＭＦＲ）が０．１
〜５０ｇ／１０分の範囲内にあり、質量平均分子量（Ｍ
ｗ）と数平均分子量（Ｍｎ）の比（Ｍｗ／Ｍｎ）が３以
下のポリオレフィン樹脂１５〜３６質量％及びスズ化合
物６４〜８５質量％よりなることを特徴とする放射線遮
蔽材。1. The method according to claim 1, wherein the density is in the range of 0.84 to 0.92 g / cm 3 and the melt flow rate (MFR) is 0.1.
５０50 g / 10 min, and the weight average molecular weight (M
A radiation shielding material comprising a polyolefin resin having a ratio (Mw / Mn) of 3 to 3% or less (w) and a number average molecular weight (Mn) of 15 to 36% by mass and a tin compound of 64 to 85% by mass.
用いて製造された樹脂である、請求項１記載の放射線遮
蔽材。2. The radiation shielding material according to claim 1, wherein the polyolefin resin is a resin produced using a metallocene catalyst.
１または２記載の放射線遮蔽材。3. The radiation shielding material according to claim 1, wherein the tin compound is tin dioxide.
及び充填材からなる群から選択される１種または２種以
上の成分を含有してなる、請求項１ないし３のいずれか
１項記載の放射線遮蔽材。4. The method according to claim 1, comprising one or more components selected from the group consisting of antioxidants, lubricants, antistatic agents, weathering agents and fillers. A radiation shielding material according to the item.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000320758A JP2002131474A (en) | 2000-10-20 | 2000-10-20 | Radiation shielding material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000320758A JP2002131474A (en) | 2000-10-20 | 2000-10-20 | Radiation shielding material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002131474A true JP2002131474A (en) | 2002-05-09 |
Family
ID=18798987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000320758A Withdrawn JP2002131474A (en) | 2000-10-20 | 2000-10-20 | Radiation shielding material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002131474A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1322517C (en) * | 2004-08-06 | 2007-06-20 | 住友重机械工业株式会社 | Radioactive liquid generating system and heating chamber with dispensing function |
-
2000
- 2000-10-20 JP JP2000320758A patent/JP2002131474A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1322517C (en) * | 2004-08-06 | 2007-06-20 | 住友重机械工业株式会社 | Radioactive liquid generating system and heating chamber with dispensing function |
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