JPH0270001A - Antibacterial composition for powder metallurgy - Google Patents
Antibacterial composition for powder metallurgyInfo
- Publication number
- JPH0270001A JPH0270001A JP63220732A JP22073288A JPH0270001A JP H0270001 A JPH0270001 A JP H0270001A JP 63220732 A JP63220732 A JP 63220732A JP 22073288 A JP22073288 A JP 22073288A JP H0270001 A JPH0270001 A JP H0270001A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- food
- drink
- composition
- antibacterial
- 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
- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 17
- 239000000203 mixture Substances 0.000 title claims description 33
- 238000004663 powder metallurgy Methods 0.000 title claims description 11
- 239000000843 powder Substances 0.000 claims abstract description 31
- 230000002285 radioactive effect Effects 0.000 claims abstract description 20
- 239000011888 foil Substances 0.000 claims abstract description 10
- ZCUFMDLYAMJYST-UHFFFAOYSA-N thorium dioxide Chemical compound O=[Th]=O ZCUFMDLYAMJYST-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910003452 thorium oxide Inorganic materials 0.000 claims abstract description 8
- 238000005245 sintering Methods 0.000 claims abstract description 5
- 229910052751 metal Inorganic materials 0.000 claims description 35
- 239000002184 metal Substances 0.000 claims description 35
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 17
- 239000011707 mineral Substances 0.000 claims description 17
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 12
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- 238000000465 moulding Methods 0.000 claims description 5
- 235000013305 food Nutrition 0.000 abstract description 20
- 239000005022 packaging material Substances 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 238000004806 packaging method and process Methods 0.000 abstract description 2
- 239000003755 preservative agent Substances 0.000 abstract description 2
- 230000002335 preservative effect Effects 0.000 abstract description 2
- 229910052873 allanite Inorganic materials 0.000 abstract 1
- 235000021485 packed food Nutrition 0.000 abstract 1
- 239000012857 radioactive material Substances 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 9
- 230000005855 radiation Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 241000894006 Bacteria Species 0.000 description 5
- 235000013527 bean curd Nutrition 0.000 description 5
- 235000015278 beef Nutrition 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 4
- 235000019645 odor Nutrition 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000009472 formulation Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 239000004760 aramid Substances 0.000 description 2
- 229920003235 aromatic polyamide Polymers 0.000 description 2
- IKNAJTLCCWPIQD-UHFFFAOYSA-K cerium(3+);lanthanum(3+);neodymium(3+);oxygen(2-);phosphate Chemical compound [O-2].[La+3].[Ce+3].[Nd+3].[O-]P([O-])([O-])=O IKNAJTLCCWPIQD-UHFFFAOYSA-K 0.000 description 2
- 239000007822 coupling agent Substances 0.000 description 2
- 230000001877 deodorizing effect Effects 0.000 description 2
- VQCBHWLJZDBHOS-UHFFFAOYSA-N erbium(iii) oxide Chemical compound O=[Er]O[Er]=O VQCBHWLJZDBHOS-UHFFFAOYSA-N 0.000 description 2
- HQKMJHAJHXVSDF-UHFFFAOYSA-L magnesium stearate Chemical compound [Mg+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O HQKMJHAJHXVSDF-UHFFFAOYSA-L 0.000 description 2
- 229910052590 monazite Inorganic materials 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- GETQZCLCWQTVFV-UHFFFAOYSA-N trimethylamine Chemical compound CN(C)C GETQZCLCWQTVFV-UHFFFAOYSA-N 0.000 description 2
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- 239000005751 Copper oxide Substances 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- LWNCNSOPVUCKJL-UHFFFAOYSA-N [Mg].[P] Chemical compound [Mg].[P] LWNCNSOPVUCKJL-UHFFFAOYSA-N 0.000 description 1
- PLEZGBHMSVTPPQ-UHFFFAOYSA-N [O-2].[Ra+2] Chemical compound [O-2].[Ra+2] PLEZGBHMSVTPPQ-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- JIHMVMRETUQLFD-UHFFFAOYSA-N cerium(3+);dioxido(oxo)silane Chemical compound [Ce+3].[Ce+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O JIHMVMRETUQLFD-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- FUJCRWPEOMXPAD-UHFFFAOYSA-N lithium oxide Chemical compound [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 description 1
- 229910001947 lithium oxide Inorganic materials 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 235000019359 magnesium stearate Nutrition 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 229910000484 niobium oxide Inorganic materials 0.000 description 1
- URLJKFSTXLNXLG-UHFFFAOYSA-N niobium(5+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Nb+5].[Nb+5] URLJKFSTXLNXLG-UHFFFAOYSA-N 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910001936 tantalum oxide Inorganic materials 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
- Powder Metallurgy (AREA)
Abstract
Description
本発明は、金属製品を得るための一つの方法である粉末
冶金技術に用いる組成物に関し、特に抗菌性に優れた組
成物に関するものである。また、この粉末冶金の技術に
よって得られた各種の抗菌性金属製品、特に抗菌性のア
ルミニウム箔に関するものである。The present invention relates to a composition used in powder metallurgy, which is one method for obtaining metal products, and particularly to a composition with excellent antibacterial properties. The present invention also relates to various antibacterial metal products obtained by this powder metallurgy technique, particularly antibacterial aluminum foil.
従来より、金属製品は種々の用途に用いられている。特
に、金属製品の中でもアルミニウム箔は飲食品等の包装
材料として広く用いられている。
ところで、内容物である飲食品の腐敗を防止するために
、飲食品に防腐剤を混入する方法又は飲食品を加熱殺菌
する方法等の飲食品自体を加工する方法が従来より採用
されている。しかしながら、この方法は飲食品の加工工
程が必要になるため不合理であるという欠点があった。Metal products have been used for various purposes. In particular, among metal products, aluminum foil is widely used as a packaging material for foods and drinks. By the way, in order to prevent the food and drink contents from spoiling, methods of processing the food and drink products themselves, such as a method of mixing a preservative into the food and drink products or a method of heat sterilizing the food and drink products, have been conventionally employed. However, this method has the disadvantage of being unreasonable because it requires a processing step for the food and drink.
このようなことから、本発明者等は包装材料であるアル
ミニウム箔等の金属製品に抗菌性を付与し、飲食品に加
工を施すことなく腐敗を防止することを試みた。本発明
者等は、まず金属製品中に放射性元素を含有させること
を考えた。これは、金属製品で飲食品を包装−づるごと
により、ｈ（射線が飲食品に照射されて、飲食品中の菌
の住に抑制及び殺滅が図れるからである。
しかし、単に放射性元素を金属製品中に含イ１させても
、放射線が有効に照射されないと七えられた。この理由
は、放射性元素が金属原子乙こ取り囲まれてしまうから
である。
そこで、本発明者等は放射性鉱物の粉末を使用し、１１
８つ粉末冶金の技術を用いることにより、放射線が有効
に照射される金属製品を得るごとに成功し、本発明に到
ったのである。For these reasons, the present inventors attempted to impart antibacterial properties to metal products such as aluminum foil, which are packaging materials, to prevent food and drinks from spoiling without undergoing any processing. The present inventors first considered incorporating a radioactive element into a metal product. This is because by packaging foods and drinks with metal products, the food and drinks are irradiated with radiation, which suppresses and kills bacteria in the food and drinks. It was concluded that even if a metal product contains a radioactive element, radiation will not be effectively irradiated.The reason for this is that the radioactive element is surrounded by metal atoms. Using mineral powder, 11
By using eight powder metallurgy techniques, they succeeded in obtaining metal products that can be effectively irradiated with radiation, leading to the present invention.
【課題を解決するだめの手段及び作用］即ち本発明は、
金属わ）末と放射性鉱物の粉末とよりなる粉末冶金用抗
菌性組成物、及びこの組成物を用いて粉末冶金の一般的
技術を適用するごとにより得られた金属製品に関するも
のである。
本発明において金属粉末としては、アルミニウム粉末、
銅粉末、鉄粉末等が用いられる。また、酸化アルミニウ
ムや酸化銅等の金属化合物の粉末も、本発明において金
属粉末とし２て用いられる。
ごの金属粉末は、粉末冶金において連結剤となる４）の
であるから、粒径は細かいほど好ましく、船釣にＬｌ：
］ Ｏｔｔ〜４０μ程度がよい。
本発明において放射性鉱物としては、例えばフェルグソ
ン石、褐廉石、モナズ石等が用いられる。
これらは天然に産するものであり、例えば愛媛県波方地
力、福島県飯坂地方、長野県山［」地方１京都府人呂地
方、福島県阿武隅地方、福島県石川地力、岐阜県苗木地
方、福岡県小峠地方等で産出するものである。これらの
放射性鉱物の組成は、酸化ラジウム、酸化トリウム、酸
化ニオビュム、酸化タンタル、酸化イツトリウム、酸化
セリウム珪酸、酸化鉄、酸化アルミニウム、酸化チタニ
ウム、酸化カルシウム、酸化マンガン、酸化マグネシウ
ム、酸化マンガン、酸化エルビウム等よりなるものであ
る。この組成中の酸化トリウム等から放射線が照射され
る。従って、放射性鉱物としては特に酸化Ｉ・リウム０
．０５〜２．０重量％を含有するものを用いるのが好ま
しい。酸化トリウムが２，０重量％を超えると、照射さ
れる放射線の量が多くなり、本発明に係る組成物や金属
製品の製造現場の労働環境が悪くなる傾向が生しる。ま
た、酸化トリウムが０．０５重量％未満であると、照射
される放射線の世が少なくなりずきて、抗菌性か低下す
る傾向となる。なお、放射性鉱物の粉末の粒径も細かい
ほど好ましく、−船釣には２μ〜２０μ程度がよい。
本発明に係る組成物の金属粉末と放射性鉱物の粉末との
配合割合は、金属粉末１００重量部に対して放射性鉱物
１〜２００重量部程度が好ましい。放射性鉱物の粉末の
量が１重塑部未満であると、照射される放射線の量が少
なくなる傾向がη−しる。
また、放射性鉱物の粉末の型が２００ｆｆｌ量部を超え
ると、連結剤である金属粉末の量が相対的に少なくなり
、所定の型の金属製品を得られにくくなる傾向か住しる
。
本発明に係る組成物は、所定の粒径の金属粉末及び放射
性鉱物の粉末をボールミル等で作製して、均一・に両者
を混合することにより得るこ２二ができる。そＬ７て、
この組成物に粉末冶金の技術を適用して、所定の型に成
型し、その後焼結すれば所望の金属製品を得ることがで
きる。また、金属粉末としてアルミニウム粉末を用いた
組成物を薄板状に成型し７、その後焼結すればアルミニ
ウＪ、箔を得ることができる。なお、本発明に係る組成
物中に滑剤、例えばステアリン酸マグネシウム等を含有
させてもよい。これは、粉末間の滑りを良好にして所定
の型に成型し易くなるので好ましい。また、本発明に係
る組成物中に繊維粉、例えば芳香属ポリアミドフィブリ
ッド等の耐熱性パルプ粉等を含有さセてもよい。これは
、１Ｈられた金属製品中に大きな空隙を形成させ易くな
るので好ましい。
【実施例］
実施例１
下記の組成及び配合よりなる組成物を得た。
アルミニウム粉末（粒径３０μ）４０重量％フェルグソ
ン石（粒径５μ）５０重量％スう−アリン酸マグネジウ
ド５重量％
芳香属ポリアミ）・フィブリシト ５重量％この組成
物を■型ブレンダーに５時間投入し、均−に混合した。
その後、皿状にして油圧式加圧機を用いて５５０ｋｇ
／ ｃｒｙで加圧成型した。そして、４００°Ｃの電気
炉（気圧１０−３ｍｍ１１１Ｂ）中に５時間放置して、
焼結した。この結果、アルミニウム製の皿が得られた。
この皿に牛肉２００ｇを置き、５°Ｃに保った冷蔵庫内
に放置した。３日経過後において牛肉には全く変化が見
られず、９日経過後において若干変色が見られたが食用
に供することはできた。
比較のため、放射性鉱物を含有していないアルミニウム
製器に牛肉２００ｇを置き、５°Ｃに保った別の冷蔵庫
に放置した。３日経過後において１７３程度変色してお
り、９日経過後においては完全に腐敗していた。
これらの結果より明らかなように、本発明に係る金属製
品を用いれば牛肉中の菌の生長を抑制し、又は菌を殺滅
して牛肉の腐敗を防止することができる。
実施例２
下記の組成及び配合よりなる組成物を得た。
鉄粉末（粒径４０μ） ７０重重量モナ
ズ石（粒径３μ）３０重量％
この組成物を■型ブレンダーに５時間投入し、均一に混
合した。その後、方形状にして油圧式加圧機を用いて９
００ｋｇ ／ ｃ＋ｆｌで加圧成型した。そして、８０
０°Ｃの電気炉（気圧１０−３ｍｍ１ｇ）中に７時間放
置して、焼結した。この結果、鉄製の水槽が得られた。
この水槽中に水と共に豆腐を入れて常温で放置しておい
たところ、１０日経過後においても豆腐は柔らかく変化
は見られなかった。
比較のため、放射性鉱物を含有していない水槽中に前記
と同一の条件で豆腐を入れておいたところ、４日経過後
において豆腐は固くなっており、悪臭があった。
これらの結果より明らかなように、本発明に係る金属製
品を用いれば豆腐の腐敗を防止しろると共に、悪臭を防
止することができる。
実施例３
下記の組成及び配合よりなる組成物を得た。
銅粉末（粒径１０μ） ５０重量％褐廉
石（粒径５μ） ５０重量％この組成物
を■型ブレンダーに５時間投入し、均一に混合した。そ
の後、サイコロ状にして油圧式加圧機を用いて７００ｋ
ｇ／ｃ＋ｆｌで加圧成型した。そして、６５０°Ｃの電
気炉（気圧１０−３ｍｍＨｇ）中に４時間放置して、焼
結した。この結果、銅製のサイコロ状物が得られた。
このサイコロ状物１ｇを、臭いガス（ガス種；アンモニ
ア、硫化水素１ トリメチルアミン アセトアルデヒド
） ６００ｍ１が封入されたテトラ−バッグ内に収納し
、３時間経過後のガス濃度を測定した。また、比較のた
め活性炭１ｇを前記と同一条件で収納して、ガス濃度を
測定した。その結果を表に示す。
この結果より明らかなとおり、実施例に係るサイコロ状
物を収納したものは、比較例に係る活性炭を収納したも
のに比べて、脱臭効果に優れていることが判る。
表
（単位：ｐｐｍ）
【発明の効果】
以上説明したように、本発明に係る金属粉末と放射性鉱
物の粉末とよりなる組成物に粉末冶金技術を適用して得
られた金属製品は、多孔質であるため放射性鉱物より放
射線が障害なく照射される。
従って、この金属製品（例えばアルミニウム箔）に各種
飲食品を収納しておけば、飲食品中の菌の生長が抑制さ
れ又は菌が殺滅されるので、飲食品の腐敗を防止しうる
という効果を奏する。また、この金属製品を各種飲食品
と共に併存しておいても、飲食品の腐敗を防止しうると
いう効果を奏する。そして更に、本発明に係る金属製品
は飲食品の腐敗に伴って生しる悪臭をも防［ヒしうる。
また、本発明に係る金属製品より照射される放射線はア
ンモニア等の悪臭物質を分解する能力を有しているため
、脱臭効果をも併有するものである。[Means and effects for solving the problem] That is, the present invention:
The present invention relates to an antibacterial composition for powder metallurgy comprising metal powder and radioactive mineral powder, and to metal products obtained by applying general techniques of powder metallurgy using this composition. In the present invention, the metal powder includes aluminum powder,
Copper powder, iron powder, etc. are used. Further, powders of metal compounds such as aluminum oxide and copper oxide can also be used as the metal powder 2 in the present invention. The metal powder used as a coupling agent in powder metallurgy4), so the finer the particle size, the better.Ll:
] Ott~40μ is preferable. In the present invention, as the radioactive mineral, for example, fergusonite, perochite, monazite, etc. are used. These are naturally occurring, for example, Namikata Jiriki in Ehime Prefecture, Iizaka region in Fukushima Prefecture, Yama [ ] region in Nagano Prefecture, Hitoro region in Kyoto Prefecture, Abusumi region in Fukushima Prefecture, Ishikawa Jiriki in Fukushima Prefecture, and Naegi region in Gifu Prefecture. It is produced in the Kotoge region of Fukuoka Prefecture. The composition of these radioactive minerals is radium oxide, thorium oxide, niobium oxide, tantalum oxide, yttrium oxide, cerium silicate oxide, iron oxide, aluminum oxide, titanium oxide, calcium oxide, manganese oxide, magnesium oxide, manganese oxide, and erbium oxide. etc. Radiation is irradiated from thorium oxide, etc. in this composition. Therefore, as a radioactive mineral, I and lithium oxide are particularly important.
．． It is preferable to use one containing 0.05 to 2.0% by weight. When thorium oxide exceeds 2.0% by weight, the amount of radiation irradiated increases, and the working environment at the manufacturing site of the composition and metal products according to the present invention tends to deteriorate. Furthermore, if the thorium oxide content is less than 0.05% by weight, the amount of radiation that is irradiated becomes less and the antibacterial properties tend to decrease. Furthermore, the particle size of the radioactive mineral powder is preferably as fine as possible, and - for boat fishing, it is preferably about 2 to 20 microns. The mixing ratio of the metal powder and the radioactive mineral powder in the composition according to the present invention is preferably about 1 to 200 parts by weight of the radioactive mineral per 100 parts by weight of the metal powder. When the amount of radioactive mineral powder is less than one plastic part, the amount of irradiated radiation tends to decrease. Furthermore, if the mold of radioactive mineral powder exceeds 200 ffl parts, the amount of metal powder as a coupling agent becomes relatively small, and it tends to become difficult to obtain a metal product of a predetermined shape. The composition according to the present invention can be obtained by preparing metal powder and radioactive mineral powder of a predetermined particle size using a ball mill or the like, and uniformly mixing the two. So L7,
A desired metal product can be obtained by applying powder metallurgy technology to this composition, molding it into a predetermined mold, and then sintering it. Alternatively, aluminum foil can be obtained by molding a composition using aluminum powder as a metal powder into a thin plate shape 7 and then sintering it. In addition, a lubricant such as magnesium stearate may be included in the composition according to the present invention. This is preferable because it improves the sliding between the powders and makes it easier to mold them into a predetermined mold. Further, the composition according to the present invention may contain fiber powder, for example, heat-resistant pulp powder such as aromatic polyamide fibrids. This is preferable because it facilitates the formation of large voids in the 1H-treated metal product. [Examples] Example 1 A composition having the following composition and formulation was obtained. Aluminum powder (particle size 30μ) 40% by weight Fergussonite (particle size 5μ) 50% by weight Magnesium phosphorus 5% by weight Aromatic polyamide fibricite 5% by weight This composition was put into a type blender for 5 hours. , evenly mixed. After that, it was made into a dish shape and weighed 550 kg using a hydraulic pressure machine.
/ Pressure molded with cry. Then, it was left in an electric furnace at 400°C (atmospheric pressure 10-3mm 111B) for 5 hours.
Sintered. As a result, an aluminum dish was obtained. 200 g of beef was placed on this plate and left in a refrigerator maintained at 5°C. After 3 days, no change was observed in the beef, and after 9 days, some discoloration was observed, but it was still edible. For comparison, 200 g of beef was placed in an aluminum container that did not contain radioactive minerals and placed in a separate refrigerator kept at 5°C. After 3 days, the color had changed to about 173, and after 9 days, it had completely rotted. As is clear from these results, by using the metal product according to the present invention, it is possible to suppress the growth of bacteria in beef or kill bacteria, thereby preventing beef from spoiling. Example 2 A composition having the following composition and formulation was obtained. Iron powder (particle size 40μ) 70% by weight Monazite (particle size 3μ) 30% by weight This composition was put into a ■-type blender for 5 hours and mixed uniformly. After that, it was made into a rectangular shape and used a hydraulic pressure machine to
Pressure molded at 00kg/c+fl. And 80
It was left to stand in an electric furnace (atmospheric pressure 10-3 mm 1 g) at 0°C for 7 hours to sinter. As a result, an iron aquarium was obtained. When tofu was placed in this water tank with water and left at room temperature, the tofu became soft and no change was observed even after 10 days had passed. For comparison, tofu was placed in a water tank that did not contain radioactive minerals under the same conditions as above, but after 4 days the tofu had become hard and had a bad odor. As is clear from these results, by using the metal product according to the present invention, it is possible to prevent tofu from rotting and also to prevent bad odor. Example 3 A composition having the following composition and formulation was obtained. Copper powder (particle size: 10 μm): 50% by weight Brown stone (particle size: 5 μm): 50% by weight This composition was placed in a type blender for 5 hours and mixed uniformly. After that, it was diced and made into 700k pieces using a hydraulic pressure machine.
Pressure molding was performed at g/c+fl. Then, it was left in an electric furnace at 650° C. (atmospheric pressure 10 −3 mmHg) for 4 hours to sinter. As a result, copper dice-like objects were obtained. 1 g of this dice-like material was placed in a Tetra bag filled with 600 ml of odor gas (gas species: ammonia, 1 hydrogen sulfide, 1 trimethylamine, acetaldehyde), and the gas concentration was measured after 3 hours had elapsed. For comparison, 1 g of activated carbon was stored under the same conditions as above and the gas concentration was measured. The results are shown in the table. As is clear from the results, it can be seen that the case containing the dice-shaped objects according to the example has a superior deodorizing effect compared to the case containing the activated carbon according to the comparative example. Table (Unit: ppm) [Effect of the invention] As explained above, the metal product obtained by applying powder metallurgy technology to the composition consisting of the metal powder and radioactive mineral powder according to the present invention has a porous structure. Therefore, radiation can be irradiated more easily than radioactive minerals. Therefore, if various foods and drinks are stored in this metal product (for example, aluminum foil), the growth of bacteria in the food and drinks will be suppressed or the bacteria will be killed, which will have the effect of preventing the food and drinks from spoiling. play. Moreover, even if this metal product is coexisted with various food and drink products, it is effective in preventing the food and drink products from spoiling. Furthermore, the metal products according to the present invention can also prevent bad odors that occur as food and drinks rot. Furthermore, since the radiation emitted from the metal product according to the present invention has the ability to decompose malodorous substances such as ammonia, it also has a deodorizing effect.
Claims (5)
用抗菌性組成物。(1) An antibacterial composition for powder metallurgy comprising metal powder and radioactive mineral powder.
項（１）記載の粉末冶金用抗菌性組成物。(2) The antibacterial composition for powder metallurgy according to claim (1), wherein aluminum powder is used as the metal powder.
０重量％を含有するものを用いる請求項（１）記載の粉
末冶金用抗菌性組成物。(3) As a radioactive mineral, thorium oxide 0.05-20
The antibacterial composition for powder metallurgy according to claim (1), wherein the antibacterial composition contains 0% by weight.
所定の型に成型した後、焼結してなる抗菌性金属製品。(4) An antibacterial metal product obtained by molding the composition according to claim (1), (2) or (3) into a predetermined mold and then sintering it.
、焼結してなる抗菌性アルミニウム箔。(5) An antibacterial aluminum foil obtained by molding the composition according to claim (2) into a thin plate and then sintering it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63220732A JPH0270001A (en) | 1988-09-02 | 1988-09-02 | Antibacterial composition for powder metallurgy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63220732A JPH0270001A (en) | 1988-09-02 | 1988-09-02 | Antibacterial composition for powder metallurgy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0270001A true JPH0270001A (en) | 1990-03-08 |
Family
ID=16755660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63220732A Pending JPH0270001A (en) | 1988-09-02 | 1988-09-02 | Antibacterial composition for powder metallurgy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0270001A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4913754A (en) * | 1972-05-18 | 1974-02-06 | ||
| JPS61149452A (en) * | 1984-12-25 | 1986-07-08 | Toshiba Corp | Sintered thoriated tungsten body and its production |
| JPS62171663A (en) * | 1986-01-25 | 1987-07-28 | Tomoji Tanaka | Freshness retaining film plate for food |
-
1988
- 1988-09-02 JP JP63220732A patent/JPH0270001A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4913754A (en) * | 1972-05-18 | 1974-02-06 | ||
| JPS61149452A (en) * | 1984-12-25 | 1986-07-08 | Toshiba Corp | Sintered thoriated tungsten body and its production |
| JPS62171663A (en) * | 1986-01-25 | 1987-07-28 | Tomoji Tanaka | Freshness retaining film plate for food |
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