JP4517240B2 - Flexible radiation shielding / sound insulating material - Google Patents
Flexible radiation shielding / sound insulating material Download PDFInfo
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- JP4517240B2 JP4517240B2 JP2005072866A JP2005072866A JP4517240B2 JP 4517240 B2 JP4517240 B2 JP 4517240B2 JP 2005072866 A JP2005072866 A JP 2005072866A JP 2005072866 A JP2005072866 A JP 2005072866A JP 4517240 B2 JP4517240 B2 JP 4517240B2
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- 230000005855 radiation Effects 0.000 title claims description 26
- 239000011810 insulating material Substances 0.000 title claims description 16
- 229920001971 elastomer Polymers 0.000 claims description 35
- 239000000806 elastomer Substances 0.000 claims description 31
- 229920005989 resin Polymers 0.000 claims description 27
- 239000011347 resin Substances 0.000 claims description 27
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 18
- 229920005992 thermoplastic resin Polymers 0.000 claims description 12
- 239000004433 Thermoplastic polyurethane Substances 0.000 claims description 11
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims description 11
- 239000004014 plasticizer Substances 0.000 claims description 9
- 229920005672 polyolefin resin Polymers 0.000 claims description 9
- 239000004677 Nylon Substances 0.000 claims description 8
- 229920001778 nylon Polymers 0.000 claims description 8
- 229920000728 polyester Polymers 0.000 claims description 7
- 229920006346 thermoplastic polyester elastomer Polymers 0.000 claims description 7
- 239000011342 resin composition Substances 0.000 claims description 6
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 5
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 4
- 239000003063 flame retardant Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 description 15
- 239000005038 ethylene vinyl acetate Substances 0.000 description 13
- 239000011230 binding agent Substances 0.000 description 12
- QLZJUIZVJLSNDD-UHFFFAOYSA-N 2-(2-methylidenebutanoyloxy)ethyl 2-methylidenebutanoate Chemical compound CCC(=C)C(=O)OCCOC(=O)C(=C)CC QLZJUIZVJLSNDD-UHFFFAOYSA-N 0.000 description 11
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 description 11
- 239000005042 ethylene-ethyl acrylate Substances 0.000 description 11
- 238000001125 extrusion Methods 0.000 description 10
- 229920000459 Nitrile rubber Polymers 0.000 description 9
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 9
- 239000003795 chemical substances by application Substances 0.000 description 9
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 9
- 230000003712 anti-aging effect Effects 0.000 description 8
- 239000008188 pellet Substances 0.000 description 8
- 239000004709 Chlorinated polyethylene Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 7
- 239000003381 stabilizer Substances 0.000 description 7
- 150000001336 alkenes Chemical class 0.000 description 6
- 239000012774 insulation material Substances 0.000 description 6
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 5
- 239000004952 Polyamide Substances 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 239000011133 lead Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 229920002647 polyamide Polymers 0.000 description 4
- 229920006124 polyolefin elastomer Polymers 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000005060 rubber Substances 0.000 description 4
- 229910052721 tungsten Inorganic materials 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- CGPRUXZTHGTMKW-UHFFFAOYSA-N ethene;ethyl prop-2-enoate Chemical compound C=C.CCOC(=O)C=C CGPRUXZTHGTMKW-UHFFFAOYSA-N 0.000 description 1
- 235000012438 extruded product Nutrition 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Description
本発明は、タングステン粉末を結合剤で結合した可撓性放射線遮蔽・遮音材に関わり、特に繰り返して再生加工できるシート状、ベルト状、コード状等の形状を有するタングステン粉末入り可撓性放射線遮蔽・遮音材に関する。 The present invention relates to a flexible radiation shielding / sound insulating material in which tungsten powder is bonded with a binder, and in particular, flexible radiation shielding containing tungsten powder having a sheet shape, a belt shape, a cord shape, and the like that can be repeatedly reprocessed. -Regarding sound insulation.
従来から、放射線用の遮蔽材や遮音材としては、高比重の鉛粉末とオレフィン系樹脂を主成分とする、安価でかつ良好な特性の可撓性放射線遮蔽・遮音材がよく知られ、用いられてきた。しかしながら、この可撓性放射線遮蔽・遮音材は、結合剤のオレフィン系樹脂の特性からして、使用される環境温度が１００℃以下に限られ、高温の環境下（１００〜１３０℃）では利用することができなかった。一方、この放射線遮蔽材・遮音材の主成分である鉛は人体に有害であり、世界的な環境意識の高まりの中で、鉛を含む可撓性放射線遮蔽・遮音材の使用が制限又は禁止されるようになった。
これまで、可撓性放射線遮蔽・遮音材を構成する樹脂結合剤としては、オレフィン系樹脂のエチレン・ヴィニール・アセテイト（ＥＶＡ）、塩素化ポリエチレン（ＣＰＥ）、ニトリルブタジエンラバー（ＮＢＲ）、塩素化ビニール樹脂（ＰＶＣ）等が使用されてきた。
しかし、ニトリルブタジエンラバー（ＮＢＲ）に代表される加硫ゴムは、製造工程で物性向上のために加硫工程を通ることから、押し出し成型などで生じた端材等を再生加工することができず、製造コストが上昇する要因となっていた。
また、塩素化ポリエチレン（ＣＰＥ）、塩素化ビニール樹脂（ＰＶＣ）は、ハロゲンを構造中に含有するため、高温度下では塩素を発生し、周辺機器を腐食させる原因となり、また焼却するとダイオキシン等を発生する恐れがあり、環境を汚染するという問題を有していた。同様に、エチレン・ヴィニール・アセテイト（ＥＶＡ）は、高温下で分解して酢酸を発生し、これも周辺機器を腐食させる恐れがあることから、高温下での利用は制限される。
その他ゴムの性質を有する樹脂材料として、ポリアミドエラストマー（ナイロンエラストマー）やポリスチレンが挙げられる。これらの代表的なエラストマーとして、ポリアミドエラストマー（ナイロンエラストマー）は高融点であり、シート成形体は柔軟性や屈曲性に乏しく、成形体に占める金属粉末比率が多くなると屈曲性が低下し、十分な可撓性が得られにくい問題もあった。
またスチレン系エラストマーは、金属粉末との「ぬれ性」が悪く、金属粉末比率が多くなると可撓性が十分に得られにくいという問題があった。
Up to now, as resin binders constituting flexible radiation shielding / sound insulation materials, olefin resin ethylene vinyl acetate (EVA), chlorinated polyethylene (CPE), nitrile butadiene rubber (NBR), chlorinated vinyl Resin (PVC) has been used.
However, vulcanized rubber typified by nitrile butadiene rubber (NBR) passes through the vulcanization process in order to improve the physical properties in the manufacturing process. The manufacturing cost was a factor.
In addition, chlorinated polyethylene (CPE) and chlorinated vinyl resin (PVC) contain halogen in the structure, so they generate chlorine at high temperatures and cause corrosion of peripheral equipment. There was a problem that it may occur and pollute the environment. Similarly, ethylene vinyl acetate (EVA) is limited to use at high temperatures because it decomposes at high temperatures to generate acetic acid, which can also corrode peripheral equipment.
Other resin materials having rubber properties include polyamide elastomer (nylon elastomer) and polystyrene. As these typical elastomers, the polyamide elastomer (nylon elastomer) has a high melting point, the sheet molded article has poor flexibility and bendability, and if the ratio of the metal powder in the formed body increases, the bendability is lowered and sufficient. There was also a problem that flexibility was difficult to obtain.
Further, the styrene elastomer has a problem that the “wetting property” with the metal powder is poor, and when the metal powder ratio is increased, it is difficult to obtain sufficient flexibility.
そこで本発明は、結合剤により金属粉末を結合した可撓性放射線遮蔽・遮音材において、耐熱性を有し（１００〜１３０℃の環境下で使用できる）、再生加工が可能であり、十分な可撓性と鉛代替物質を用いて、すぐれた放射線遮蔽・遮音材を実現することである。すなわち、十分な放射線遮蔽・遮音効果をもち、再生加工可能な可撓性放射線遮蔽・遮音材を提供、実現することである。 Therefore, the present invention is a flexible radiation shielding / sound insulating material in which metal powder is bound by a binder, has heat resistance (can be used in an environment of 100 to 130 ° C.), can be reprocessed, and is sufficient. It is to realize excellent radiation shielding and sound insulation materials using flexibility and lead substitutes. That is, to provide and realize a flexible radiation shielding / sound insulating material that has sufficient radiation shielding / sound insulation effect and can be reprocessed.
前記課題を達成するため、本発明者らは、樹脂結合剤として熱可塑性ポリウレタンエラストマーを本体として、これにエチレンエチルアクリレート（ＥＥＡ）やエチレン・ヴィニール・アセテイト（ＥＶＡ）を混合添加することによって、前記課題を解決できると考え、鋭意検討を重ねた結果、少なくとも樹脂結合剤と、鉛代替物質としてのタングステン粉末を含む組成物であって、該結合剤のうち、熱可塑性ポリウレタンエラストマーを樹脂中に１０〜９０重量部含み、残りをオレフィン系樹脂とする組成物にすることによって、本発明を完成するに至った。 In order to achieve the above object, the present inventors have a thermoplastic polyurethane elastomer as a resin binder as a main body, and by adding ethylene ethyl acrylate (EEA) or ethylene vinyl acetate (EVA) thereto, As a result of intensive studies, it is a composition containing at least a resin binder and tungsten powder as a lead substitute, and among the binder, thermoplastic polyurethane elastomer is contained in the resin. The present invention was completed by using a composition containing ˜90 parts by weight and the rest being an olefin resin.
同様にポリエステル系エラストマーを本体として、これにエチレンエチルアクリレート（ＥＥＡ）やエチレン・ヴィニール・アセテイト（ＥＶＡ）を混合添加することによって、前記課題を解決できることを見出し、少なくとも樹脂結合剤とタングステン粉末を含む組成物であって、該結合剤のうち、ポリエステル系エラストマーを樹脂中に１０〜９０重量部含み、残りをオレフィン系樹脂とする組成物にすることによって、本発明を完成するに至った。 Similarly, it has been found that the above-mentioned problems can be solved by mixing and adding a polyester-based elastomer as a main body with ethylene ethyl acrylate (EEA) or ethylene vinyl acetate (EVA), and includes at least a resin binder and tungsten powder. The present invention was completed by using a composition comprising 10 to 90 parts by weight of a polyester-based elastomer in the resin and the rest being an olefin-based resin.
請求項１又は２の熱可塑性樹脂にポリアミドエラストマー（ナイロンエラストマー）を５〜１５重量部添加することによって本発明を完成するに至った。 The present invention has been completed by adding 5 to 15 parts by weight of polyamide elastomer (nylon elastomer) to the thermoplastic resin of claim 1 or 2.
請求項１又は２又は３の熱可塑性樹脂に、２５〜１５０重量部に相当する難燃剤を加えることによって本発明を完成するに至った。 The present invention has been completed by adding a flame retardant corresponding to 25 to 150 parts by weight to the thermoplastic resin of claim 1, 2 or 3.
請求項１又は２又は３又は４の可撓性放射線遮蔽・遮音材にポリエステル若しくはＵＶ樹脂を被覆することによって本発明を完成するに至った。 The present invention has been completed by coating the flexible radiation shielding / sound insulating material of claim 1 or 2 or 3 or 4 with polyester or UV resin.
上記構成によれば、十分な放射線遮蔽性・遮音性、熱安定性、可撓性を有し、屈曲しても折れ欠けのない、ゴムのような柔軟な可撓性放射線遮蔽・遮音材を得ることができる。 According to the above configuration, a flexible radiation shielding / sound insulating material such as rubber that has sufficient radiation shielding / sound insulation, thermal stability, flexibility, and does not break even when bent. Obtainable.
ここで、結合剤は熱可塑性ポリウレタンエラストマー及びオレフィン系エラストマー（ＥＶＡ又はＮＢＲ）を含み、それらの重量比は、熱可塑性ポリウレタンエラストマー：オレフィン系エラストマーで、９：１〜５：５であることが必要である。熱可塑性ポリウレタンエラストマーとオレフィン系エラストマーの配合比がこの範囲よりも高すぎると、成形物の表面にベタつきなどの現象が生じて取り扱いに支障をきたす。逆にオレフィン系エラストマーの量が多くなると、耐熱性、折れ曲げ性、再生加工性が悪くなるために好ましくない。 Here, the binder includes a thermoplastic polyurethane elastomer and an olefin-based elastomer (EVA or NBR), and the weight ratio thereof is thermoplastic polyurethane elastomer: olefin-based elastomer, and needs to be 9: 1 to 5: 5. It is. When the blending ratio of the thermoplastic polyurethane elastomer and the olefin elastomer is too higher than this range, a phenomenon such as stickiness occurs on the surface of the molded product, which hinders handling. Conversely, when the amount of the olefin-based elastomer is increased, the heat resistance, the bendability and the reproducibility are deteriorated, which is not preferable.
または、結合剤は熱可塑性ポリエステル系エラストマー及びオレフィン系エラストマー（ＥＶＡ又はＮＢＲ）を含み、それらの重量比は、熱可塑性ポリエステル系エラストマー：オレフィン系エラストマーで、９：１〜５：５であることが必要である。熱可塑性ポリエステル系エラストマーとオレフィン系エラストマーの配合比がこの範囲よりも高すぎると、成形物の表面にベタつきなどの現象が生じて取り扱いに支障をきたす。逆にオレフィン系エラストマーの量が多くなると、耐熱性、折れ曲げ性、再生加工性が悪くなるために好ましくない。 Alternatively, the binder includes a thermoplastic polyester elastomer and an olefin elastomer (EVA or NBR), and the weight ratio of the thermoplastic polyester elastomer: olefin elastomer is 9: 1 to 5: 5. is necessary. When the blending ratio of the thermoplastic polyester elastomer and the olefin elastomer is too higher than this range, a phenomenon such as stickiness occurs on the surface of the molded product, which hinders handling. Conversely, when the amount of the olefin-based elastomer is increased, the heat resistance, the bendability and the reproducibility are deteriorated, which is not preferable.
本発明に使用されるタングステン粉末は、結合剤を１００重量部としたとき、８００〜２０００重量部を配合するとよい。この範囲を下回ると十分な放射線遮蔽効果・遮音効果が得られず、これを上回るとシート状に成形したときのシートの可撓性と折れ曲げ性が悪くなり、折れや欠けが生じ好ましくない。 The tungsten powder used in the present invention may contain 800 to 2000 parts by weight when the binder is 100 parts by weight. Below this range, sufficient radiation shielding effect / sound insulation effect cannot be obtained, and when exceeding this range, the flexibility and bendability of the sheet when formed into a sheet shape are deteriorated, and folding and chipping are undesirable.
熱可塑性樹脂にポリアミドエラストマー（ナイロンエラストマー）を５〜１５重量部添加することで、押し出し成形性、加工性を向上させることができる。 By adding 5 to 15 parts by weight of a polyamide elastomer (nylon elastomer) to the thermoplastic resin, the extrusion moldability and processability can be improved.
熱可塑性樹脂に２５〜１５０重量部に相当する難燃剤を加えることで、難燃化も可能となる。 By adding a flame retardant corresponding to 25 to 150 parts by weight to the thermoplastic resin, it is possible to make the flame retardant.
そして、可撓性放射線遮蔽・遮音材にポリエステル若しくはＵＶ樹脂（紫外線硬化樹脂）を被覆することで、耐油性を向上させることができる。 The oil resistance can be improved by coating the flexible radiation shielding / sound insulating material with polyester or UV resin (ultraviolet curable resin).
本発明のタングステン粉末入り樹脂組成物は、所望の耐熱性と可撓性及び組成中に塩素などの有害なハロゲンを含まないので、混練や成形加工中や高温環境下にこれら組成物が置かれても、分解ガスや腐食性ガス発生の恐れがなく、すぐれた物性が得られる。 The resin composition containing tungsten powder of the present invention does not contain harmful halogen such as chlorine in the desired heat resistance and flexibility, so that the composition is placed during kneading or molding or in a high temperature environment. However, there is no risk of generation of decomposition gas or corrosive gas, and excellent physical properties can be obtained.
本発明の可撓性放射線遮蔽・遮音材は、熱可塑性を有することから、樹脂結合剤とタングステン粉末の混合・混練には、ニーダーやロール、連続式二軸混練機等の混練機を用いることできる。混練性をよくするために、チタネート系カップリング剤でタングステン粉末を表面処理したり、分散剤を使用したりしてもよい。本発明の可撓性樹脂組成物は、押し出し成形機にて加工・成形を行うので、成形性の向上及び、滑剤や樹脂の老化防止のために、老化防止剤や耐候剤を添加することもできる。 Since the flexible radiation shielding / sound insulating material of the present invention has thermoplasticity, a kneader such as a kneader, a roll, or a continuous biaxial kneader is used for mixing and kneading the resin binder and the tungsten powder. it can. In order to improve kneadability, the tungsten powder may be surface-treated with a titanate coupling agent or a dispersant may be used. Since the flexible resin composition of the present invention is processed and molded by an extrusion molding machine, an anti-aging agent or a weathering agent may be added to improve moldability and prevent aging of lubricants and resins. it can.
こうして得られたペレット混合物は、押し出し成形機で成形加工が可能で、従来のオレフィン系樹脂成形品と比べ、耐熱性が大幅に向上し、かつ再生加工が可能となる。また、押し出し成形品シートに、ポリエステル若しくはＵＶ樹脂などの種々の樹脂コートを塗工することによって、ハンドリング、耐油性が向上する。 The pellet mixture obtained in this way can be molded by an extrusion molding machine, has significantly improved heat resistance and can be reprocessed as compared with conventional olefin-based resin molded products. Moreover, handling and oil resistance are improved by applying various resin coats such as polyester or UV resin to the extruded product sheet.
本発明の可撓性放射線遮蔽・遮音材は、厚さ１ｍｍ〜５ｍｍほどのシート状に成形加工することができ、このシート形状は可撓性を発揮しやすいものである。 The flexible radiation shielding / sound insulating material of the present invention can be molded into a sheet shape having a thickness of about 1 mm to 5 mm, and this sheet shape easily exhibits flexibility.
実施例による本発明を以下に詳細に説明するが、本発明は以下の実施例によって限定されるものではない。実施例及び比較例の「部数」は全て重量部数を表す。 The present invention will be described in detail below by way of examples, but the present invention is not limited to the following examples. “Parts” in the examples and comparative examples all represent parts by weight.
熱可塑性ポリウレタンエラストマー（クラレ（株）製）４０部、エチレン・ヴィニール・アセテイト（三井・デュポン社製）２０部、エチレン・エチルアクリレート（日本ユニカー（株）製）２０部、老化防止剤０．２部、安定剤０．２部、可塑剤２０部、タングステン粉末（日本タングステン（株）製）１６００部を計量後、１６インチロールにて２０分間混練し、ペレタイザーにてペレット混合物を得た。次いで、押し出し成形機にて、巾２５０ｍｍ、厚さ２ｍｍのタングステン粉末入り可撓性樹脂シートを得た。 40 parts of thermoplastic polyurethane elastomer (manufactured by Kuraray Co., Ltd.), 20 parts of ethylene vinyl acetate (manufactured by Mitsui DuPont), 20 parts of ethylene ethyl acrylate (manufactured by Nippon Unicar Co., Ltd.), anti-aging agent 0.2 Parts, stabilizer 0.2 parts, plasticizer 20 parts, tungsten powder (manufactured by Nippon Tungsten Co., Ltd.) 1600 parts were weighed, kneaded with a 16 inch roll for 20 minutes, and a pellet mixture was obtained with a pelletizer. Next, a flexible resin sheet containing tungsten powder having a width of 250 mm and a thickness of 2 mm was obtained by an extrusion molding machine.
熱可塑性ポリウレタンエラストマー（クラレ（株）製）６０部、エチレン・ヴィニール・アセテイト（三井・デュポン社製）１０部、エチレン・エチルアクリレート（日本ユニカー（株）製）１０部、老化防止剤０．２部、安定剤０．２部、可塑剤２０部、タングステン粉末（日本タングステン（株）製）１６００部を計量後、１６インチロールにて２０分間混練し、ペレタイザーにてペレット混合物を得た。次いで、押し出し成形機にて、巾２５０ｍｍ、厚さ２ｍｍのタングステン粉末入り可撓性樹脂シートを得た。 60 parts of thermoplastic polyurethane elastomer (manufactured by Kuraray Co., Ltd.), 10 parts of ethylene vinyl acetate (manufactured by Mitsui DuPont), 10 parts of ethylene ethyl acrylate (manufactured by Nippon Unicar Co., Ltd.), anti-aging agent 0.2 Parts, stabilizer 0.2 parts, plasticizer 20 parts, tungsten powder (manufactured by Nippon Tungsten Co., Ltd.) 1600 parts were weighed, kneaded with a 16 inch roll for 20 minutes, and a pellet mixture was obtained with a pelletizer. Next, a flexible resin sheet containing tungsten powder having a width of 250 mm and a thickness of 2 mm was obtained by an extrusion molding machine.
熱可塑性ポリウレタンエラストマー（クラレ（株）製）５０部、エチレン・ヴィニール・アセテイト（三井・デュポン（株）製）１０部、エチレン・エチルアクリレート（日本ユニカー（株）製）１０部、ナイロンエラストマー（アトケム（株）製）１０部、老化防止剤０．２部、安定剤０．２部、可塑剤２０部、タングステン粉末（日本タングステン（株）製）１６００部を計量後、１６インチロールにて２０分間混練し、ペレタイザーにてペレット混合物を得た。次いで、押し出し成形機にて、巾２５０ｍｍ、厚さ２ｍｍのタングステン粉末入り可撓性樹脂シートを得た。 50 parts of thermoplastic polyurethane elastomer (manufactured by Kuraray Co., Ltd.), 10 parts of ethylene vinyl acetate (manufactured by Mitsui DuPont), 10 parts of ethylene ethyl acrylate (manufactured by Nippon Unicar Co., Ltd.), nylon elastomer (Atchem) 10 parts), 0.2 parts of anti-aging agent, 0.2 parts of stabilizer, 20 parts of plasticizer, 1600 parts of tungsten powder (manufactured by Nippon Tungsten Co., Ltd.), 20 parts in a 16-inch roll. The mixture was kneaded for minutes and a pellet mixture was obtained with a pelletizer. Next, a flexible resin sheet containing tungsten powder having a width of 250 mm and a thickness of 2 mm was obtained by an extrusion molding machine.
熱可塑性ポリエステルエラストマー（三菱化学（株）製）５０部、ニトリルブタジエンラバー（日本ゼオン（株）製）２０部、エチレン・エチルアクリレート（日本ユニカー（株）製）１０部、ナイロンエラストマー（アトケム（株）製）１０部、老化防止剤０．２部、安定剤０．２部、可塑剤２０部、タングステン粉末（日本タングステン（株）製）１６００部を計量後、１６インチロールにて２０分間混練し、ペレタイザーにてペレット混合物を得た。次いで、押し出し成形機にて、巾２５０ｍｍ、厚さ２ｍｍのタングステン粉末入り可撓性樹脂シートを得た。 50 parts of thermoplastic polyester elastomer (Mitsubishi Chemical Corporation), 20 parts of nitrile butadiene rubber (made by Nippon Zeon Co., Ltd.), 10 parts of ethylene ethyl acrylate (made by Nippon Unicar Co., Ltd.), nylon elastomer (Atchem Co., Ltd.) )) 10 parts, 0.2 parts of anti-aging agent, 0.2 parts of stabilizer, 20 parts of plasticizer, 1600 parts of tungsten powder (manufactured by Nippon Tungsten Co., Ltd.), and kneaded for 20 minutes with a 16-inch roll. Then, a pellet mixture was obtained with a pelletizer. Next, a flexible resin sheet containing tungsten powder having a width of 250 mm and a thickness of 2 mm was obtained by an extrusion molding machine.
（比較例１）エチレン・エチルアクリレート（日本ユニカー（株）製）３０部、エチレン・ヴィニール・アセテイト（三井・デュポン（株）製）２０部、塩素化ポリエチレン（昭和電工製）４０部、老化防止剤、安定剤、可塑剤、鉛粉末１０００部を計量後、１６インチロールにて２０分間混練し、ペレタイザーにてペレット混合物を得た。次いで、押し出し成形機にて、巾２５０ｍｍ、厚さ２ｍｍの鉛粉末入り可撓性樹脂シートを得た。 (Comparative Example 1) 30 parts of ethylene / ethyl acrylate (manufactured by Nippon Unicar Co., Ltd.), 20 parts of ethylene vinyl acetate (manufactured by Mitsui DuPont), 40 parts of chlorinated polyethylene (manufactured by Showa Denko), anti-aging After weighing 1000 parts of the agent, stabilizer, plasticizer, and lead powder, the mixture was kneaded for 20 minutes with a 16-inch roll, and a pellet mixture was obtained with a pelletizer. Next, a flexible resin sheet containing lead powder having a width of 250 mm and a thickness of 2 mm was obtained by an extrusion molding machine.
（比較例２）ニトリルブタジエンラバー（日本ゼオン（株）製）５０部、エチレン・エチルアクリレート（日本ユニカー（株）製）３０部、エチレン・ヴィニール・アセテイト（三井・デュポン（株）製）２０部、老化防止剤、安定剤、可塑剤、鉛粉末１０００部を計量後、１６インチロールにて２０分間混練し、ペレタイザーにてペレット混合物を得た。次いで、押し出し成形機にて、巾２５０ｍｍ、厚さ２ｍｍの鉛粉末入り可撓性樹脂シートを得た。 (Comparative Example 2) 50 parts of nitrile butadiene rubber (manufactured by Nippon Zeon Co., Ltd.), 30 parts of ethylene ethyl acrylate (manufactured by Nippon Unicar Co., Ltd.), 20 parts of ethylene vinyl acetate (manufactured by Mitsui DuPont Co., Ltd.) Then, 1000 parts of an anti-aging agent, stabilizer, plasticizer and lead powder were weighed, kneaded for 20 minutes with a 16-inch roll, and a pellet mixture was obtained with a pelletizer. Next, a flexible resin sheet containing lead powder having a width of 250 mm and a thickness of 2 mm was obtained by an extrusion molding machine.
（比較例３）ニトリルブタジエンラバー（日本ゼオン（株）製）４０部、エチレン・エチルアクリレート（日本ユニカー（株）製）３０部、エチレン・ヴィニール・アセテイト（三井・デュポン（株）製）１０部、ナイロンエラストマー（アトケム（株）製）１０部、老化防止剤、安定剤、可塑剤、鉛粉末１０００部を計量後、１６インチロールにて２０分間混練し、ペレタイザーにてペレット混合物を得た。次いで、押し出し成形機にて、巾２５０ｍｍ、厚さ２ｍｍの鉛粉末入り可撓性樹脂シートを得た。 (Comparative Example 3) 40 parts of nitrile butadiene rubber (manufactured by Nippon Zeon Co., Ltd.), 30 parts of ethylene ethyl acrylate (manufactured by Nippon Unicar Co., Ltd.), 10 parts of ethylene vinyl acetate (manufactured by Mitsui DuPont Co., Ltd.) 10 parts of nylon elastomer (manufactured by Atchem Co., Ltd.), anti-aging agent, stabilizer, plasticizer, and 1000 parts of lead powder were weighed and then kneaded for 20 minutes with a 16-inch roll, and a pellet mixture was obtained with a pelletizer. Next, a flexible resin sheet containing lead powder having a width of 250 mm and a thickness of 2 mm was obtained by an extrusion molding machine.
熱安定性の評価は、１２０℃のオーブンに５００時間放置し、放置前の可撓性、引っ張り強度測定し、ゴム硬度を評価した。 Evaluation of thermal stability was carried out by leaving it in an oven at 120 ° C. for 500 hours, measuring flexibility and tensile strength before leaving, and evaluating rubber hardness.
可撓性の評価は、厚さ１．３ｍｍの試料を直径１０ｍｍのパイプに、室温で１８０°巻きつけて、亀裂、ワレ等が発生しない場合を○、亀裂等が発生した場合を×とした。 In the evaluation of flexibility, a sample having a thickness of 1.3 mm was wound around a pipe having a diameter of 10 mm by 180 ° at room temperature, and when cracks, cracks, etc. did not occur, ○, and when cracks, etc. occurred, ×. .
引張り強度の評価は、厚さ１ｍｍのシート磁石をＪＩＳ２号型試験片（Ｋ７１１３）型に打ち抜き、ＳＶ−３０１型引張圧縮試験機にて測定した。 Evaluation of tensile strength was performed by punching a sheet magnet having a thickness of 1 mm into a JIS No. 2 type test piece (K7113) type and using an SV-301 type tensile compression tester.
軟化点評価は、厚さ０．６ｍｍの試料をＴＡインスツルメントＴＭＡ２９４０ＴＭＡによってＴＭＡ測定を行い、変曲点を求めた。 For the softening point evaluation, a sample having a thickness of 0.6 mm was subjected to TMA measurement using TA Instrument TMA2940TMA, and an inflection point was obtained.
各例の評価結果を表１に示す。表１からわかるように実施例１〜４は好結果を示し、オレフィン系樹脂を主体にした比較例１〜３に比べ、耐熱性が大幅に向上していることがわかる。また、実施例１〜４は、加熱前と加熱後の可撓性、軟化展変化において優秀な結果を示し、有用な材料であることがわかる。同様に耐油性についても、比較例１，２，３は、表面が一部溶解しているのに対し、実施例ではポリエステルコートすることによって膨潤がなく、耐油性も有することがわかる。
比較例１，２，３は、塩素化ポリエチレン（ＣＰＥ）、エチレン・ヴィニール・アセテイト及びエチレン・エチルアクリレートを主体とした組成物であり、著しく柔軟性を失い、加熱後、ゴム硬度が上がり、脆くなった。これは、一部が部分的に劣化、分解したためと思われる。
Comparative Examples 1, 2, and 3 are compositions mainly composed of chlorinated polyethylene (CPE), ethylene vinyl acetate, and ethylene ethyl acrylate, which remarkably loses flexibility and increases in rubber hardness and becomes brittle after heating. became. This is probably due to partial degradation and decomposition.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2003004892A (en) * | 2001-04-16 | 2003-01-08 | Kanebo Ltd | Radiation shield vessel |
| JP2003096240A (en) * | 2001-09-27 | 2003-04-03 | Maruyoshi:Kk | Chlorine-containing rubber composition containing tungsten |
| JP2004020317A (en) * | 2002-06-14 | 2004-01-22 | Kanebo Ltd | Radiation shield glove and its manufacturing method |
| WO2004084234A1 (en) * | 2003-03-18 | 2004-09-30 | Nippon Tungsten Co., Ltd. | Shield material |
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| JP2003004892A (en) * | 2001-04-16 | 2003-01-08 | Kanebo Ltd | Radiation shield vessel |
| JP2003096240A (en) * | 2001-09-27 | 2003-04-03 | Maruyoshi:Kk | Chlorine-containing rubber composition containing tungsten |
| JP2004020317A (en) * | 2002-06-14 | 2004-01-22 | Kanebo Ltd | Radiation shield glove and its manufacturing method |
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