JPH05186767A - Far-infrared-radiating powder - Google Patents

Far-infrared-radiating powder

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Publication number
JPH05186767A
JPH05186767A JP234592A JP234592A JPH05186767A JP H05186767 A JPH05186767 A JP H05186767A JP 234592 A JP234592 A JP 234592A JP 234592 A JP234592 A JP 234592A JP H05186767 A JPH05186767 A JP H05186767A
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Prior art keywords
powder
far
infrared
oxide
metal
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JP234592A
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Japanese (ja)
Inventor
Toshihiko Kosugi
敏彦 小杉
Original Assignee
Ayama Yasukata
Toshihiko Kosugi
敏彦 小杉
阿山 泰賢
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Priority to JP234592A priority Critical patent/JPH05186767A/en
Publication of JPH05186767A publication Critical patent/JPH05186767A/en
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Abstract

PURPOSE:To prepare the title powder which radiates far-infrared rays efficiently and stably at a relatively low temp. by mixing a fine far-infrared-radiating powder comprising an inorg. oxide with a fine metal powder having a high thermal conductivity. CONSTITUTION:The particle diameters of a fine far-infrared-radiating powder comprising an inorg. oxide (e.g. silicon dioxide) (A) and a fine metal powder having a high thermal conductivity (e.g. aluminum) or/and a powder contg. a metal black body exhibiting a high catalytic effect on thermochemical reaction (e.g. palladium) (B) are adjusted to several hundredths to several mum, and the powders are mixed to give the title powder, which, being a fine powder, can be mixed with and uniformly dispersed in a synthetic resin, fiber, etc., thus giving a product which radiates energy uniformly from the entire surface. A pref. amt. compounded of component B is 1-30 pts.wt. based on 100 pts.wt. component A.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】本発明は、比較的低温域で遠赤外線を効率的にかつ安定させて放射することが可能な遠赤外線放射用粉体に関する。 The present invention relates to a far infrared radiating powders capable of emitting relatively efficiently and stabilize the far-infrared in a low temperature range.

【0002】 [0002]

【従来の技術】自然界に存在する遠赤外線放射物質としては、二酸化珪素等無機酸化物に多く、放射効率は低いが此の種の酸化物は常温でも遠赤外線を放射していることが知られている。 The far-infrared emitting substance present in the Related Art nature, many silicon dioxide and inorganic oxides, the radiation efficiency is low but oxides 此 species is known that radiates far-infrared rays at room temperature ing. この遠赤外線放射物質は、その放射に対して温度依存性があるので、放射効率を上げるには如何に速やかに放射率が高まるだけの温度(熱)を安定して与えるかにある。 The far-infrared emitting material, so that there is a temperature dependence to radiation, in or provide a temperature just how quickly emissivity to increase the radiation efficiency increases (heat) stable.

【0003】 [0003]

【発明が解決しようとする課題】この安定して熱を与える問題に対しては、基本的には金属等の熱伝導作用を利用することで解決されると思料される。 BRIEF Problem to be Solved] to the problem of giving the stable heat is Shiryo and is basically solved by utilizing the heat conduction action of the metal or the like. すなわち、前記酸化物に熱伝導率の高い物質を混入することである。 That is that the incorporation of high thermal conductivity material to the oxide. しかし一般に熱伝導率の高い物質としては金属が多く、熱付与の下では変質し易い欠点があって、安定性に欠ける。 In general, however many metals as material having a high thermal conductivity, under heat application there is liable drawbacks altered, lacks stability. この変質が生じ難く高い安定性と熱伝導率を保持し得る金属とすれば、金等の貴金属にほぼ限定されるため、コスト高になり経済性に問題がある。 If metal this alteration may hold the hard high stability and thermal conductivity occurs, to be substantially restricted to a noble metal such as gold, there is a problem in economy becomes costly.

【0004】本発明は、このような問題点の解消を図るために成されたものであり、本発明の目的は、比較的低温の下で放射効率の高い遠赤外線放射が可能で、しかも高安定度および低コストを実現し得る遠赤外線放射用粉体を提供することにある。 [0004] The present invention has been made in order to solve such problems, an object of the present invention is capable of relatively low radiation efficiency high far-infrared radiation under, and with high and to provide a far-infrared radiating powder can realize stability and low cost.

【0005】 [0005]

【課題を解決するための手段】本発明は、上記の目的を達成するため以下に述べる構成としたものである。 The present invention SUMMARY OF THE INVENTION are those where the structure described below to achieve the above object. 即ち、本発明は、無機酸化物の遠赤外線放射粉体と、熱伝導率の高い金属の粉体または/および熱化学反応に対する触媒効果が高い金属の黒体を含む粉体との混合体であり、各粉体は、径が百分の数ミクロン乃至数ミクロンの微粉体であることを特徴とする遠赤外線放射用粉体である。 That is, the present invention includes a far infrared radiation powder of the inorganic oxide, in admixture with a powder catalytic effect comprises a black body with high metal to a high thermal conductivity metal powder and / or thermochemical reaction There, each powder is a far-infrared radiating powder, wherein the size of fine powder of a few hundredths of microns to a few microns.

【0006】また本発明は、無機酸化物の遠赤外線放射粉体を担体としその表面に、熱伝導率の高い金属または/および熱化学反応に対する触媒効果が高い金属からなる黒体を含む微粉体あるいは薄膜が付着されてなり、径が百分の数ミクロン乃至数ミクロンの微粉体であることを特徴とする遠赤外線放射用粉体である。 [0006] The present invention is a far infrared radiation powder of an inorganic oxide on the surface thereof as a carrier, fine powder containing a black body catalytic effect on high metals and / or thermochemical reaction heat conductivity is made of a metal having high or thin film is being deposited, a far-infrared radiating powder, wherein the size of fine powder of a few hundredths of microns to a few microns.

【0007】さらに本発明は、遠赤外線放射粉体が、二酸化珪素、酸化第二鉄、酸化チタン、酸化アルミニューム、ジルコニア、酸化カルシウム、酸化マグネシウム、 [0007] The present invention is far-infrared emitting powder, silicon dioxide, ferric oxide, titanium oxide, aluminum oxide, zirconia, calcium oxide, magnesium oxide,
酸化ナトリウム、酸化カリウムの無機酸化物中から選ばれ、熱伝導率の高い金属の粉体あるいは薄膜が、金、 Sodium oxide, selected from the inorganic oxide of potassium, high metal powder or thin film thermal conductivity, gold,
銀、銅、アルミニウム、タングステン、ベリリウム、モリブデン中の少なくとも一つから選ばれ、熱化学反応に対する触媒効果が高い金属の黒体を含む粉体あるいは薄膜が、パラジウム、ルテニウム、ロジウム、オスミウム、イリジウム、レニウム中の少なくとも一つから選ばれることを特徴とする前記各構成の遠赤外線放射用粉体である。 Silver, copper, aluminum, tungsten, beryllium, selected from at least one in molybdenum powder or thin catalytic effect for thermochemical reaction contains high metal black body of, palladium, ruthenium, rhodium, osmium, iridium, characterized in that said selected at least one of rhenium is far infrared radiating powder of each component.

【0008】 [0008]

【作用】本発明によれば、高温度域(700〜1300 According to the present invention, the high temperature region (700-1300
°K)はもとより比較的低温度域(700°K未満)でも十分なエネルギー放射量が得られる。 ° K) is a relatively low temperature region (less than 700 ° K) even sufficient energy radiation amount can be obtained as well. また本発明は、 Further, the present invention is,
径が百分の数ミクロン乃至数ミクロンの微粉体であるから、合成樹脂、繊維等に混入する場合、加工上で分散性が良くて加工品の全面から均一にエネルギーを放射させることができ、液状にする必要があるときにもブラウン運動が円滑に行われる利点がある。 Since diameter is a fine powder of a few hundredths of microns to a few microns, synthetic resins, when mixed in fiber or the like, can be uniformly emit energy from the entire surface of the workpiece with satisfactory dispersibility on processing, there is an advantage that Brownian motion is smoothly performed even when it is necessary to liquid. 特に、上記の微粉体としたことによって、表面積が増大することと、熱伝導率の高い金属または/および熱化学反応に対する触媒効果が高い金属を添加することとが相まって、通常に比して20〜30%程度の遠赤外線放射率の向上が果たされる。 In particular, the fact that the above fine powder, and the surface area is increased, and the catalytic effect for metal having high thermal conductivity and / or thermochemical reaction is added a high metals together, compared to the normal 20 improvement of the far-infrared radiation rate of about 30% is achieved. なお、本発明に係る遠赤外線放射用粉体は、無機酸化物中から選ばれた遠赤外線放射粉体の百重量部に対して、熱伝導率の高い金属の粉体と熱化学反応に対する触媒効果が高い金属の粉体との合計重量部数が1乃至3 Incidentally, far infrared radiating powder according to the present invention, the catalyst relative to one hundred parts by weight of the selected inorganic oxide far-infrared emitting powder, the high thermal conductivity metal to the powder and the thermochemical reaction the total number of parts by weight of the powder is highly effective metal 1 to 3
0、好ましくは3乃至10の範囲内にあることが、遠赤外線放射率の向上度と製品コストとの関係からして望ましい。 0, preferably be in the range of 3 to 10, preferably in the relationship between the degree of improvement and the manufacturing cost of the far-infrared emissivity.

【0009】 [0009]

【実施例】本発明は上述したように、二酸化珪素、酸化第二鉄、酸化チタン、酸化アルミニューム、ジルコニア、酸化カルシウム、酸化マグネシウム、酸化ナトリウム、酸化カリウムの無機酸化物中から選ばれた遠赤外線放射粉体に、金、銀、銅、アルミニウム、タングステン、ベリリウム、モリブデン中の少なくとも一つから選ばれた熱伝導率の高い金属の粉体を混ぜ、またはその粉体もしくは薄膜を付着させ、さらに必要に応じて、パラジウム、ルテニウム、ロジウム、オスミウム、イリジウム、レニウム中の少なくとも一つから選ばれた熱化学反応に対する触媒効果が高い金属の黒体を含む粉体を混ぜ、またはその粉体もしくは薄膜を付着させることによって、遠赤外線放射用粉体が構成される。 As EXAMPLES The present invention is described above, silicon dioxide, ferric oxide, titanium oxide, aluminum oxide, zirconia, calcium oxide, magnesium oxide, sodium oxide, far selected from the inorganic oxides of potassium oxide the infrared radiation powder, gold, silver, copper, aluminum, tungsten, beryllium, mixing a high metal powder thermal conductivity selected from at least one in molybdenum, or by attaching the powder or thin film, if necessary, palladium, ruthenium, mixed rhodium, osmium, iridium, a powder containing a catalyst-effective black body of the metal to the thermochemical reaction selected from at least one in the rhenium, or a powder or by depositing a thin film, far infrared radiating powder is constituted. この場合の遠赤外線放射用粉体は、無機酸化物中から選ばれた遠赤外線放射粉体の百重量部に対して、熱伝導率の高い金属の粉体と熱化学反応に対する触媒効果が高い金属の粉体との合計重量部数が1乃至10の範囲内にあることが望ましい。 Far infrared radiating powder in this case, with respect to one hundred parts by weight of the selected inorganic oxide far-infrared emitting powder, a high catalytic effect of metal having high thermal conductivity to the powder and the thermochemical reaction the total number of parts by weight of the powder of the metal is preferably in the range of 1 to 10.

【0010】上記遠赤外線放射用粉体は、径が百分の数ミクロン乃至数ミクロンの微粉体に形成されるものであって、たとえば、無機酸化物の遠赤外線放射粉体として約2ミクロン径の二酸化珪素を用い、その表面に微細径の金をコロイド状にして付着させる。 [0010] The far-infrared radiating powder, there is the diameter is formed on the fine powder of a few hundredths of microns to a few microns, for example, about 2 microns diameter as far-infrared radiation powder of an inorganic oxide with silicon dioxide, the fine diameter of the gold is deposited in the colloidally its surface. このようにして得られた複合遠赤外線放射用粉体の100重量部に対して、約1ミクロン径のパラジウム微粉体(パラジウムブラック)を3重量部添加して、均等に混ぜ合わせる。 Thus with respect to 100 parts by weight of the composite far-infrared radiating powder thus obtained, approximately 1 palladium fine powder of micron size (palladium black) 3 parts by weight was added, to evenly mix. この粉体は、用途に応じて粉体のまま、あるいはペレット状で使用し、また、樹脂整形品の整形時にあるいは合成繊維の紡出時に原料中に混入させて使用することができる。 This powder is the form of powder depending on the application or use in pellet form, also at the time of or synthetic fibers during shaping of the resin shaped article spun by mixed into the raw material may be used.

【0011】上記の例の粉体に溶液を加えて薄いシート状に形成した後、乾燥して厚さ0.2mmのシートを得、同様に約2ミクロン径の二酸化珪素の粉体のみによる厚さ0.2mmの比較シートを作製して、波長4、8 [0011] After forming the above example the powder to the solution was added a thin sheet and dried to obtain a sheet having a thickness of 0.2mm, the thickness only by the powder of silicon dioxide similarly about 2 microns diameter to prepare a 0.2mm comparison sheet is the wavelength 4,8
μmの遠赤外線放射熱量と表面温度との関係を調べた結果は図1の通りであって、本発明に係るシート(実線で示す)の方が比較シート(破線で示す)よりも多くの熱量が得られることが明らかとなった。 Results of examining the relationship between the far-infrared radiation heat and the surface temperature of μm is a street 1, large amount of heat than the sheet according to the present invention compared towards (indicated by a solid line) sheet (shown in phantom) it became clear that can be obtained.

【0012】次に上記の例の粉体についての使用例を以下に挙示する。 [0012] Next ani Shimesuru below an example of using the powder of the above examples. (1)水道水の脱塩素実験、 二つの同じガラスグラスに水道水を入れ、片方に遠赤外線放射用粉体を投入する。 (1) dechlorination experiments in tap water, placed in tap water to two same glass-glass, to introduce the far-infrared radiating powder one. 数分後、塩素試薬を入れ、二つのグラスの脱塩素状態を調べた。 After a few minutes, put chlorine reagent was examined dechlorination state of the two glasses. その結果、遠赤外線放射用粉体を入れた水には黄色の塩素反応は見られず、遠赤外線放射用粉体が入っていないグラスの水は明らかに黄色の塩素反応が現れた。 As a result, not seen chlorine reaction yellow in water containing the far-infrared radiating powder, water glass that does not have far-infrared radiating powder were clearly appeared yellow chlorine reaction.

【0013】(2)頭髪化粧品に対する効果の実験、 A、コールドパーマウエーブ剤に遠赤外線放射用粉体を1重量%混入し、仕上がりまでの時間的経過と仕上がり感を観察したところ、パーマの薬液の反応時間が全体的に20乃至30%短縮され、仕上がりの艶、弾力、手触り、毛髪の根元からの立ち上がり等が頗る良くなった。 [0013] (2) hair cosmetic effects experiments on, A, where the far-infrared radiating powder to a cold perm wave agent mixed 1 wt%, was observed time course and finish feeling to finish, perm chemicals It is shortened or reaction time as a whole of 20 to 30%, gloss finish, elasticity, hand, rising like from the root of the hair becomes extremely good.
また、パーマウエーブの定着、即ち持ち時間に改善が見られ、ウエーブが取れる期間が従来のパーマ法に比しながくなり、パーマが長持ちした。 The fixing of the permanent waving, i.e. improved time limit was observed, the period of the wave can be taken is long compared with the conventional permanent methods, perm was long-lasting.

【0014】B、ヘアートリートメント剤に遠赤外線放射用粉体を1重量%混入し、その仕上がり感を観察した。 [0014] B, and far-infrared radiating powder hair treatment agents mixed 1 wt%, was observed workmanship feeling. 同じトリートメント剤と比較して数回のテストを行った結果、仕上がりの艶、弾力、手触りについて明らかな改善が見られた。 As a result of the number of times the test as compared to the same treatment agent, gloss finish, elasticity, it is a clear improvement for the texture was observed.

【0015】C、染毛料に遠赤外線放射用粉体を1重量%混入して仕上がりまでの時間的経過と仕上がり感とを観察した結果、染毛時間が30乃至50%短縮され、仕上がりのガサ付きやパサ付きがなく、色の定着もまた持ちも向上した。 [0015] C, and far-infrared radiating powder mixed 1 wt% to hair dye with the result of observation of the time course and finish feeling to finish, hair time is shortened from 30 to 50%, of the finished Gasa There is no month with or Pasa, was improved also also has color fixing.

【0016】(3)防カビ効果の実験、 別々のシャーレの中に遠赤外線放射用粉体を5重量%混入した寒天とそうでない寒天とを入れ、温蔵庫に収容して培養する。 [0016] (3) Test of antifungal effect, put agar otherwise as separate far infrared radiating powder 5 wt% entrained agar in a petri dish, and cultured housed in a heating cabinet.
7日後、遠赤外線放射用粉体を入れたシャーレにはカビの発生が殆ど見られないが、別のシャーレには著しいカビの発生が確認された。 After 7 days, the occurrence of mold in a petri dish containing the far-infrared radiation for the powder is hardly observed, the occurrence of significant mold in another dish has been confirmed.

【0017】(4)発芽促進効果の実験、 別々のシャーレの中に遠赤外線放射用粉体を5重量%混入した綿花を水に浸したものと、ただの綿花を水に浸したものとを入れて、その上に緑豆モヤシの種子を数個蒔き、発芽の時間的な差を観察した。 [0017] (4) the germination promoting effect experiments, separate far infrared radiating powder 5 wt% entrained cotton in a petri dish and those immersed in water, and those immersed just cotton water put plated several seeds mung bean sprout thereon was observed temporal differences in germination. その結果、遠赤外線放射用粉体を混入したシャーレの緑豆モヤシの発芽率が大変高く、 As a result, high germination rate of mung bean sprout of mixed with far infrared radiating powder dish is very,
また、発芽にかかった日数の短縮が観察された。 In addition, shortening the number of days it took to germination was observed.

【0018】ところで本発明において使用される、熱化学反応に対する触媒効果が高い金属が、パラジウムの場合は水素化反応の他、脱ハロゲンやカルボニレーションに優れた特性が発揮され、ルテニウムの場合は酸化反応、脱水素反応に、イリジウムでは分解反応に、ロジウムではカルボニレーション、還元アミノ化、酸化反応に、レニウムでは選択水素化、メタセシス反応に、オスミウムでは選択水素化反応に優れた特性が発揮されるものであり、それぞれ用途に応じて適当な金属を使用すれば良い。 By the way used in the present invention, the metal catalyst is highly effective against thermochemical reactions, other in the case of palladium hydrogenation reaction properties with excellent dehalogenation or carbonylation is exhibited in the case of ruthenium oxidation reactions, the dehydrogenation reaction, the decomposition reaction is iridium, the rhodium carbonylation, reductive amination, to an oxidation reaction, selective hydrogenation is rhenium, the metathesis reaction, exhibits excellent properties in selective hydrogenation reactions osmium is intended to be, it may be used a suitable metal depending on the respective application.

【0019】 [0019]

【発明の効果】以上述べたように、本発明に係る遠赤外線放射用粉体は、微粉体であるから、原料中への均一な混合が容易であり、また各種成形用原料としても適していて、遠赤外線に対する十分にして均一性の高いエネルギー放射量を得ることが可能である。 As described above, according to the present invention, far-infrared radiating powder according to the present invention, since a fine powder, it is easy to uniformly mix into the raw material, also Also suitable as various molding material Te, it is possible to obtain a high energy radiation dose uniformity and sufficient for the far infrared. さらに、加熱、乾燥の促進効果、植物や農作物の育成効果、醗酵熟成の期間短縮効果、人体の発汗・鎮痛・代謝機能促進諸効果、 In addition, heating, drying effect of promoting, fostering effect of plants and crops, the period shortening effect of fermentation aging, the human body sweating, pain, metabolic function promoting various effect,
水分子の低分子化、化粧品・医薬品の高浸透性効果等が奏される。 Low molecular weight of the water molecules, high osmotic effects such as cosmetics and pharmaceuticals are achieved.

【0020】また、本発明の遠赤外線放射用粉体によれば、消費した乾電池、切れの鈍った刃物と一緒に置くだけで電気、切れ味が回復したり、その他、防カビ効果があったりするものであり、遠赤外線放射だけでは説明の付かない特有の効果が奏されることが種々の実験によって明らかであって、その用途をさらに拡大し得る利点が有り実用的に優れた発明である。 [0020] In addition, according to the far-infrared radiation for the powder of the present invention, it spent batteries, electricity at only put together with the blade dulled the sharp, or recovery sharpness, other, or there is an antifungal effect are those, only far-infrared radiation is a clear by various experiments that specific effect unexplained is exhibited, it is practically excellent invention there is an advantage capable of further expanding the use thereof.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明の実施例と比較例とを遠赤外線放射熱量と表面温度との関係で対比して示す線図である。 1 is a diagram showing a comparison in relation to the embodiment and the comparative example the far-infrared radiation heat and the surface temperature of the present invention.

Claims (3)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 無機酸化物の遠赤外線放射粉体と、熱伝導率の高い金属の粉体または/および熱化学反応に対する触媒効果が高い金属の黒体を含む粉体との混合体であり、各粉体は、径が百分の数ミクロン乃至数ミクロンの微粉体であることを特徴とする遠赤外線放射用粉体。 And far-infrared radiation powder as claimed in claim 1] inorganic oxides, be a mixture of powder containing the black body with high metal catalytic effect of metal having high thermal conductivity to the powder and / or thermochemical reaction each powder, far-infrared radiating powder, wherein the size of fine powder of a few hundredths of microns to a few microns.
  2. 【請求項2】 無機酸化物の遠赤外線放射粉体を担体としその表面に、熱伝導率の高い金属または/および熱化学反応に対する触媒効果が高い金属からなる黒体を含む微粉体あるいは薄膜が付着されてなり、径が百分の数ミクロン乃至数ミクロンの微粉体であることを特徴とする遠赤外線放射用粉体。 To 2. A far-infrared radiation powder of an inorganic oxide as a support surface thereof, the fine powder or a thin film containing a black body catalytic effect for metal having high thermal conductivity and / or thermochemical reaction having a higher metal deposited becomes, the far-infrared radiating powder, wherein the size of fine powder of a few hundredths of microns to a few microns.
  3. 【請求項3】 遠赤外線放射粉体が、二酸化珪素、酸化第二鉄、酸化チタン、酸化アルミニューム、ジルコニア、酸化カルシウム、酸化マグネシウム、酸化ナトリウム、酸化カリウムの無機酸化物中から選ばれ、熱伝導率の高い金属の粉体あるいは薄膜が、金、銀、銅、アルミニウム、タングステン、ベリリウム、モリブデン中の少なくとも一つから選ばれ、熱化学反応に対する触媒効果が高い金属の黒体を含む粉体あるいは薄膜が、パラジウム、ルテニウム、ロジウム、オスミウム、イリジウム、 3. A far-infrared emitting powder, selected silicon dioxide, ferric oxide, titanium oxide, aluminum oxide, zirconia, calcium oxide, magnesium oxide, sodium oxide, from the inorganic oxide of potassium, thermal powder powder or a thin film of high conductivity metal, including gold, silver, copper, aluminum, tungsten, beryllium, selected from at least one in molybdenum blackbody high metal catalytic effect for thermochemical reaction Alternatively thin film, palladium, ruthenium, rhodium, osmium, iridium,
    レニウム中の少なくとも一つから選ばれることを特徴とする請求項1または2に記載の遠赤外線放射用粉体。 Far infrared radiating powder according to claim 1 or 2, characterized in that selected from at least one of rhenium.
JP234592A 1992-01-09 1992-01-09 Far-infrared-radiating powder Pending JPH05186767A (en)

Priority Applications (1)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP234592A JPH05186767A (en) 1992-01-09 1992-01-09 Far-infrared-radiating powder

Publications (1)

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JPH05186767A true JPH05186767A (en) 1993-07-27

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JP234592A Pending JPH05186767A (en) 1992-01-09 1992-01-09 Far-infrared-radiating powder

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5779784A (en) * 1993-10-29 1998-07-14 Cookson Matthey Ceramics & Materials Limited Pigmentary material

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6424837A (en) * 1987-07-21 1989-01-26 Keiichi Yamamoto Elastic foam

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6424837A (en) * 1987-07-21 1989-01-26 Keiichi Yamamoto Elastic foam

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5779784A (en) * 1993-10-29 1998-07-14 Cookson Matthey Ceramics & Materials Limited Pigmentary material

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