JPH06207161A - Improved near infrared light absorbing material and ink using the same - Google Patents
Improved near infrared light absorbing material and ink using the sameInfo
- Publication number
- JPH06207161A JPH06207161A JP1973393A JP1973393A JPH06207161A JP H06207161 A JPH06207161 A JP H06207161A JP 1973393 A JP1973393 A JP 1973393A JP 1973393 A JP1973393 A JP 1973393A JP H06207161 A JPH06207161 A JP H06207161A
- Authority
- JP
- Japan
- Prior art keywords
- component
- absorbing material
- weight
- copper
- infrared absorbing
- 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.)
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Abstract
(57)【要約】
【目的】近赤外線を有効に吸収し、しかも無色の近赤外
線吸収材料を提供する。
【構成】銅をＣｕＯ、リン酸をＰ2 Ｏ5 に換算してＣｕ
Ｏ／Ｐ2 Ｏ5 のモル比が０．０５〜４である銅含有リン
酸化合物にコバルト成分、ネオジウム成分、エルビウム
成分、マグネシウム成分、カルシウム成分、ストロンチ
ウム成分、バリウム成分の一種以上を含有させたもの。(57) [Abstract] [Purpose] To provide a near-infrared absorbing material that effectively absorbs near-infrared rays and is colorless. [Constitution] Cu converted to CuO and phosphoric acid converted to P 2 O 5
A copper-containing phosphate compound having an O / P 2 O 5 molar ratio of 0.05 to 4 was allowed to contain at least one of a cobalt component, a neodymium component, an erbium component, a magnesium component, a calcium component, a strontium component, and a barium component. thing.
Description
【０００１】[0001]
【産業上の利用分野】本発明は近赤外線吸収材料及びそ
れを使用したインクに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a near infrared ray absorbing material and an ink using the same.
【０００２】[0002]
【従来の技術】従来、物体や画像は肉眼で認識していた
ため、認識しやすい材料とは可視光線領域での光線を吸
収あるいは散乱する材料であった。しかし、最近、自動
的に物体や画像を認識する技術が急速に進歩している。
そして、この画像を認識、読みとるための光源として
は、半導体レーザーが主流になるといわれている。半導
体レーザー光線としては、７００〜１６００ｎｍの波長
領域のものが、実用化されているが、この波長は近赤外
線の領域であり、肉眼では認識できない。可視光線を良
好に吸収あるいは散乱する物体や画像でも、必ずしも近
赤外線を良好に吸収、散乱するとは限らない。従来の材
料では物体や画像がこの近赤外線領域で認識し難いとい
う課題があった。この課題を克服する材料として、我々
は先に銅含有リン酸化合物が有効であることを見出して
いる。2. Description of the Related Art Conventionally, since an object or an image has been recognized by the naked eye, the easily recognizable material has been a material that absorbs or scatters light rays in the visible light region. However, recently, a technology for automatically recognizing an object or an image has rapidly advanced.
A semiconductor laser is said to become the mainstream as a light source for recognizing and reading this image. As the semiconductor laser beam, one in the wavelength range of 700 to 1600 nm has been put into practical use, but this wavelength is in the near infrared region and cannot be recognized by the naked eye. Even an object or image that satisfactorily absorbs or scatters visible light does not always satisfactorily absorb and scatter near infrared rays. The conventional material has a problem that it is difficult to recognize an object or an image in this near infrared region. As a material that overcomes this problem, we have previously found that a copper-containing phosphate compound is effective.
【０００３】[0003]
【発明が解決しようとする課題】銅含有リン酸化合物は
近赤外線で認識が容易な材料であるが、若干の緑色を呈
している。肉眼で認識されずに近赤外線でのみ認識され
るような材料が得られれば、種々の新しい用途展開が期
待される。本発明では、銅含有リン酸化合物の近赤外線
認識能を損なわずに淡色化した材料を提供することを目
的とする。The copper-containing phosphate compound is a material that can be easily recognized by near infrared rays, but exhibits a slight green color. If a material that can be recognized only by the near infrared rays without being recognized by the naked eye is obtained, various new applications can be expected. An object of the present invention is to provide a light-colored material without impairing the near-infrared recognition ability of the copper-containing phosphate compound.
【０００４】[0004]
【課題を解決するための手段】本発明は、銅をＣｕＯ、
リン酸をＰ2 Ｏ5 に換算してＣｕＯ／Ｐ2 Ｏ5 のモル比
が０．０５〜４である銅含有リン酸化合物に、コバルト
成分、ネオジウム成分、エルビウム成分、マグネシウム
成分、カルシウム成分、ストロンチウム成分、バリウム
成分から選ばれた少なくとも一種を含有する近赤外線吸
収材料、及び、その近赤外線吸収材料を使用したインク
である。According to the present invention, copper is added to CuO,
Converting phosphoric acid to P 2 O 5 and adding a copper-containing phosphate compound having a CuO / P 2 O 5 molar ratio of 0.05 to 4 to a cobalt component, a neodymium component, an erbium component, a magnesium component, a calcium component, A near-infrared absorbing material containing at least one selected from a strontium component and a barium component, and an ink using the near-infrared absorbing material.
【０００５】本発明近赤外線吸収材料において、コバル
ト成分、ネオジウム成分、エルビウム成分、マグネシウ
ム成分、カルシウム成分、ストロンチウム成分、バリウ
ム成分と銅含有リン酸化合物とは、混合物であってもよ
く化合物であってもよい。In the near infrared ray absorbing material of the present invention, the cobalt component, neodymium component, erbium component, magnesium component, calcium component, strontium component, barium component and copper-containing phosphate compound may be a mixture or a compound. Good.
【０００６】この銅含有リン酸化合物において、銅は近
赤外線を良好に吸収する働きをする。銅をＣｕＯ、リン
酸をＰ2 Ｏ5 に換算してＣｕＯ／Ｐ2 Ｏ5 のモル比で表
して、このモル比が０．０５未満の場合は近赤外線吸収
能力が充分でない。また、銅の濃度が高いほど近赤外線
吸収能力が高くなり好ましいが、ＣｕＯ／Ｐ2 Ｏ5 のモ
ル比が４を超えると銅含有リン酸化合物が不安定にな
る。In this copper-containing phosphate compound, copper functions to absorb near infrared rays well. Copper represents CuO, phosphoric acid in terms of P 2 O 5 in a molar ratio of CuO / P 2 O 5, the molar ratio is in the case of less than 0.05 is not sufficient near infrared absorbing capability. Further, the higher the concentration of copper is, the higher the near-infrared absorbing capacity is, which is preferable, but if the molar ratio of CuO / P 2 O 5 exceeds 4, the copper-containing phosphate compound becomes unstable.
【０００７】銅含有リン酸化合物としては、特に制限は
ないが、近赤外線吸収能力の高いものとしては、リン酸
銅としてメタリン酸銅、ピロリン酸銅、オルトリン酸
銅、銅アパタイト等がある。これらリン酸塩は、結晶水
を含むものも知られており、一般的に結晶水を含む化合
物は化学的耐久性の面でやや好ましくないが、用途によ
れば使用できる。また、銅含有リン酸化合物としては、
結晶性化合物に制限されずガラス等の非晶質状態でも問
題なく使用できる。The copper-containing phosphoric acid compound is not particularly limited, but those having a high near-infrared absorbing ability include copper phosphates such as copper metaphosphate, copper pyrophosphate, copper orthophosphate, and copper apatite. It is also known that these phosphates contain water of crystallization. Generally, compounds containing water of crystallization are somewhat unfavorable in terms of chemical durability, but they can be used depending on the application. Further, as the copper-containing phosphate compound,
It is not limited to a crystalline compound and can be used without problems even in an amorphous state such as glass.
【０００８】一方、コバルト成分、ネオジウム成分、エ
ルビウム成分、マグネシウム成分、カルシウム成分、ス
トロンチウム成分、バリウム成分は、近赤外線吸収能力
を損なわずに淡色化する働きをする。なかでも、コバル
ト成分、ネオジウム成分、カルシウム成分は、その働き
に優れているので、特に好ましい化合物である。このコ
バルト成分、ネオジウム成分、エルビウム成分、マグネ
シウム成分、カルシウム成分、ストロンチウム成分、バ
リウム成分としては、酸化物、リン酸塩、硫酸塩、硝酸
塩、炭酸塩、金属などが例示される。On the other hand, the cobalt component, the neodymium component, the erbium component, the magnesium component, the calcium component, the strontium component, and the barium component function to lighten without impairing the near-infrared absorbing ability. Among them, the cobalt component, the neodymium component, and the calcium component are particularly preferable compounds because they have excellent functions. Examples of the cobalt component, neodymium component, erbium component, magnesium component, calcium component, strontium component and barium component include oxides, phosphates, sulfates, nitrates, carbonates and metals.
【０００９】近赤外線吸収材料におけるコバルト成分の
含有量は、ＣｏＯに換算して０．０１〜５重量％が好ま
しい。０．０１重量％未満ではコバルト含有による淡色
化効果が少ない。一方、５重量％を超えるとコバルトに
よる着色が強くなりすぎてしまい好ましくない。特に、
コバルト成分がＣｏＯに換算して０．２〜２重量％の場
合に最も淡色化の効果が大きい。The content of the cobalt component in the near infrared absorbing material is preferably 0.01 to 5% by weight in terms of CoO. If it is less than 0.01% by weight, the lightening effect due to the cobalt content is small. On the other hand, if it exceeds 5% by weight, coloring due to cobalt becomes too strong, which is not preferable. In particular,
The lightening effect is greatest when the cobalt component is 0.2 to 2% by weight in terms of CoO.
【００１０】近赤外線吸収材料におけるネオジウム成分
の含有量は、Ｎｄ2 Ｏ3 に換算して０．１〜２０重量％
が好ましい。０．１重量％未満ではネオジウム含有によ
る淡色化効果が少ない。一方、２０重量％を超えるとネ
オジウムによる着色が強くなりすぎてしまい好ましくな
い。特に、ネオジウム成分がＮｄ2 Ｏ3 に換算して１〜
１０重量％の場合に最も淡色化の効果が大きい。The content of the neodymium component in the near infrared absorbing material is 0.1 to 20% by weight in terms of Nd 2 O 3.
Is preferred. If it is less than 0.1% by weight, the effect of lightening due to the neodymium content is small. On the other hand, if it exceeds 20% by weight, coloring with neodymium becomes too strong, which is not preferable. In particular, the neodymium component converted to Nd 2 O 3 is 1 to
When it is 10% by weight, the effect of lightening is greatest.
【００１１】近赤外線吸収材料におけるカルシウム成分
の含有量は、ＣａＯに換算して０．１〜２０重量％が好
ましい。０．１重量％未満ではカルシウム含有による淡
色化効果が少ない。一方、２０重量％を超えるとカルシ
ウムによる着色が強くなりすぎて好ましくない。特に、
カルシウム成分がＣａＯに換算して１〜１０重量％の場
合に最も淡色化の効果が大きい。The content of the calcium component in the near infrared absorbing material is preferably 0.1 to 20% by weight in terms of CaO. If it is less than 0.1% by weight, the lightening effect due to the calcium content is small. On the other hand, if it exceeds 20% by weight, coloring due to calcium becomes too strong, which is not preferable. In particular,
The effect of lightening is greatest when the calcium component is 1 to 10% by weight in terms of CaO.
【００１２】近赤外線吸収材料におけるエルビウム成分
の含有量は、Ｅｒ2 Ｏ3 に換算して０．１〜２０重量％
が好ましい。０．１重量％未満ではエルビウム含有によ
る淡色化効果が少ない。一方、２０重量％を超えるとエ
ルビウムによる着色が強くなりすぎて好ましくない。特
に、エルビウム成分がＥｒ2 Ｏ3 に換算して１〜１０重
量％の場合に最も淡色化の効果が大きい。The content of the erbium component in the near infrared absorbing material is 0.1 to 20% by weight in terms of Er 2 O 3.
Is preferred. If it is less than 0.1% by weight, the lightening effect due to the erbium content is small. On the other hand, if it exceeds 20% by weight, coloring by erbium becomes too strong, which is not preferable. In particular, the effect of lightening is greatest when the erbium component is 1 to 10% by weight in terms of Er 2 O 3 .
【００１３】近赤外線吸収材料におけるマグネシウム成
分、ストロンチウム成分、バリウム成分の含有量は、そ
れぞれＭｇＯ、ＳｒＯ、ＢａＯに換算して２〜２０重量
％が好ましい。２重量％未満ではマグネシウム、ストロ
ンチウム、バリウム含有による淡色化効果が少ない。一
方、２０重量％を超えると銅による赤外線吸収が相対的
に少なくなり好ましくない。特に、マグネシウム成分、
ストロンチウム成分、バリウム成分が、それぞれＭｇ
Ｏ、ＳｒＯ、ＢａＯに換算して３〜１５重量％の場合に
最も淡色化の効果が大きい。The content of magnesium component, strontium component, and barium component in the near infrared absorbing material is preferably 2 to 20% by weight in terms of MgO, SrO, and BaO, respectively. If it is less than 2% by weight, the lightening effect due to the inclusion of magnesium, strontium and barium is small. On the other hand, if it exceeds 20% by weight, infrared absorption by copper is relatively small, which is not preferable. Especially magnesium component,
Strontium component and barium component are Mg
The effect of lightening is greatest when it is 3 to 15% by weight in terms of O, SrO and BaO.
【００１４】この近赤外線吸収材料の製造方法として
は、次の方法が例示される。銅元素を含む物質と、コバ
ルト、ネオジウム、エルビウム、マグネシウム、カルシ
ウム、ストロンチウム、バリウムの元素を含む物質を準
備し、これとリン酸化合物と混合し加熱し、固相反応さ
せる方法がある。また、リン酸を含む溶液中に銅元素を
含む物質と、コバルト、ネオジウム、エルビウム、マグ
ネシウム、カルシウム、ストロンチウム、バリウムの元
素を含む物質を溶解させた後、加熱乾燥させる方法があ
る。さらに、銅元素を含む物質と、コバルト、ネオジウ
ム、エルビウム、マグネシウム、カルシウム、ストロン
チウム、バリウムの元素と、リン酸とを含む物質を５０
０〜２０００℃で溶融する方法がある。The following method is exemplified as a method of manufacturing this near infrared ray absorbing material. There is a method of preparing a substance containing a copper element and a substance containing an element of cobalt, neodymium, erbium, magnesium, calcium, strontium, and barium, mixing this with a phosphoric acid compound, heating the mixture, and causing a solid phase reaction. Further, there is a method in which a substance containing a copper element and a substance containing an element of cobalt, neodymium, erbium, magnesium, calcium, strontium, or barium are dissolved in a solution containing phosphoric acid and then heated and dried. Furthermore, a substance containing a copper element, a substance containing cobalt, neodymium, erbium, magnesium, calcium, strontium, barium, and phosphoric acid is used.
There is a method of melting at 0 to 2000 ° C.
【００１５】この場合、銅はリン酸化合物中に１価と２
価という二種のイオン状態で存在するが、近赤外線吸収
には２価の銅イオンが寄与するため、リン酸化合物作製
中に酸化作用を有する酸化剤を添加したり、酸化性雰囲
気中でリン酸化合物を合成することもリン酸化合物の近
赤外線吸収能力を高めるのに有効である。In this case, copper is monovalent and divalent in the phosphate compound.
Although they exist in two kinds of ionic states, namely, valence, since divalent copper ions contribute to the absorption of near-infrared rays, an oxidizing agent having an oxidizing action is added during the production of a phosphoric acid compound, or phosphorus is added in an oxidizing atmosphere. Synthesizing an acid compound is also effective in increasing the near-infrared absorbing ability of the phosphoric acid compound.
【００１６】この近赤外線吸収材料は、通常、粉末化し
て、樹脂等の結合材に分散し、ペースト状のインクにし
て使用される。この場合、近赤外線吸収材料の含有量
は、１０重量％（インクの固形分中）以上とされる。近
赤外線吸収材料の含有量が１０重量％未満では近赤外線
吸収の性能が不充分であり好ましくない。一方、近赤外
線吸収材料の含有量が多くなりすぎると、結合材の量が
少なくなり強度が低下するので、用途により赤外線吸収
材料の含有量の上限が定まる。This near-infrared absorbing material is usually used as a paste-like ink by pulverizing it and dispersing it in a binder such as resin. In this case, the content of the near infrared ray absorbing material is 10% by weight (in the solid content of the ink) or more. When the content of the near-infrared absorbing material is less than 10% by weight, the near-infrared absorbing performance is insufficient, which is not preferable. On the other hand, when the content of the near-infrared absorbing material is too large, the amount of the binder is small and the strength is lowered. Therefore, the upper limit of the content of the infrared absorbing material is determined depending on the use.
【００１７】また赤外線吸収材料を粉末とした場合の粒
径にも特に制限はないが、用途に応じて適切な粒径があ
りうる。微細な形状やパターンを認識させたい場合に
は、赤外線吸収材料粉末の粒径は細かい方がよい。一般
的に平均粒径として１００μｍ以下が好ましい。赤外線
吸収材料を粉末にする方法にも制限はないが、ボールミ
ルによる粉砕等粉末の作製法として一般的な方法が用い
られる。The particle size of the infrared absorbing material in the form of powder is not particularly limited, but may be an appropriate particle size depending on the application. In order to recognize a fine shape or pattern, the particle size of the infrared absorbing material powder should be small. Generally, the average particle size is preferably 100 μm or less. There is no limitation on the method of forming the infrared absorbing material into powder, but a general method is used as a method for producing powder such as pulverization by a ball mill.
【００１８】赤外線吸収材料粉末を分散する結合材にも
特に制限はなく、この赤外線吸収材料粉末が適切に分散
され、赤外線吸収材料の近赤外線吸収能力が発現される
ような近赤外線に比較的透明な材料が好ましい。用途に
よっては、赤外線吸収材料と可視光の屈折率が一致した
材料が、可視光に対して透明な材料となるので好ましい
場合がある。常温で使用する場合は、この結合材として
樹脂系材料が一般的に使用できる。The binder for dispersing the infrared absorbing material powder is also not particularly limited, and the infrared absorbing material powder is appropriately dispersed and is relatively transparent to near infrared rays so that the near infrared absorbing ability of the infrared absorbing material is exhibited. Preferred materials are preferred. Depending on the application, an infrared absorbing material and a material having the same refractive index as visible light may be preferable because they are transparent to visible light. When used at room temperature, a resin material can be generally used as the binder.
【００１９】赤外線吸収材料粉末を分散する方法として
は、例えば、樹脂系結合材に分散する場合には、樹脂溶
液に分散した後に溶媒を蒸発させる方法、樹脂低分子量
体中に分散した後に樹脂を重合する方法、樹脂粉末を赤
外線吸収材料粉末に混合した後に加熱焼結する方法等が
適宜使用できる。As a method of dispersing the infrared absorbing material powder, for example, in the case of dispersing it in a resin binder, a method of evaporating a solvent after dispersing it in a resin solution, or a method of dispersing the resin in a low molecular weight resin and then dispersing the resin A method of polymerizing, a method of mixing the resin powder with the infrared absorbing material powder, and then heating and sintering it can be appropriately used.
【００２０】かかるインクは、用途に応じて適宜選択で
きる。このインク自体の成形体として用いることも可能
であるが、認識したい物体の表面に塗布して使用するこ
とでも目的は達成できる。この場合、本発明の近赤外線
吸収材料は可視光線に対し無色透明であることを特徴と
してもつので、基材の肉眼による外観を損ねず近赤外線
のみを有効に吸収させることが可能となる。また、本イ
ンクを基材上にパターンを付与して塗布あるいは印刷す
ることにより、近赤外線で有効に判読できる印刷も可能
となる。The ink can be appropriately selected according to the application. Although the ink can be used as a molded body of the ink itself, the purpose can be achieved by applying the ink on the surface of an object to be recognized. In this case, since the near-infrared absorbing material of the present invention is characterized by being colorless and transparent with respect to visible light, it is possible to effectively absorb only near-infrared rays without impairing the appearance of the substrate with the naked eye. Further, by applying or printing the present ink on a base material in a pattern, it becomes possible to perform printing that can be effectively read by near infrared rays.
【００２１】[0021]
［実施例１］８５％リン酸１００重量部を水で３倍に希
釈した溶液を加熱した後、酸化銅（ＣｕＯ）６８．３重
量部を加えた。この量は、銅をＣｕＯ、リン酸をＰ2 Ｏ
5 に換算してＣｕＯ／Ｐ2 Ｏ5 のモル比が２：１に相当
する。さらに、これに、酸化コバルト（ＣｏＯ）を６．
５重量部加え、充分撹拌した後、ポリテトラフルオロエ
チレン製バットに移し、１５０℃で乾燥した。これをア
ルミナ坩堝に入れて、７００℃で５ｈ焼成し焼成物を得
た。この焼成物をボールミルで粉砕し、粉末を得た。粉
末の平均粒径は、２．８μｍであった。この粉末４０重
量部に対し、２０重量％のエチルセルロースを溶解した
α−テルピネオール溶液を６０重量部の割合で加えて混
練し、３本ロールミルにより均質分散を行い、所望の粘
度に調整し、ペースト状のインクを得た。[Example 1] A solution prepared by diluting 100 parts by weight of 85% phosphoric acid three times with water was heated, and then 68.3 parts by weight of copper oxide (CuO) was added. This amount is equivalent to CuO for copper and P 2 O for phosphoric acid.
Converted to 5 , the CuO / P 2 O 5 molar ratio corresponds to 2: 1. Further, cobalt oxide (CoO) was added to this 6.
After adding 5 parts by weight and stirring sufficiently, the mixture was transferred to a polytetrafluoroethylene vat and dried at 150 ° C. This was put in an alumina crucible and fired at 700 ° C. for 5 hours to obtain a fired product. The fired product was crushed with a ball mill to obtain a powder. The average particle size of the powder was 2.8 μm. To 40 parts by weight of this powder, an α-terpineol solution in which 20% by weight of ethylcellulose was dissolved was added at a ratio of 60 parts by weight, and kneaded, and homogenously dispersed by a three-roll mill to adjust to a desired viscosity, and to form a paste form. Got the ink.
【００２２】このインクを４インチ角のアルミナ基板の
約半面にスクリーン印刷し、乾燥した。乾燥後の印刷膜
厚は約１５μｍであった。印刷部分は、無色透明であっ
た。この板による半導体レーザー光線（波長：８１０ｎ
ｍ）に対する反射率を、アルミナ基板の反射率に対して
測定した結果、印刷部分の反射率はアルミナ基板の反射
率の約１８％であった。This ink was screen-printed on about half of a 4-inch square alumina substrate and dried. The printed film thickness after drying was about 15 μm. The printed part was colorless and transparent. Semiconductor laser beam by this plate (wavelength: 810n
As a result of measuring the reflectance for m) with respect to the reflectance of the alumina substrate, the reflectance of the printed portion was about 18% of the reflectance of the alumina substrate.
【００２３】［実施例２］８５％リン酸１００重量部を
水で３倍に希釈した溶液を加熱した後、酸化銅（Ｃｕ
Ｏ）６２．１重量部を加えた。この量は、銅をＣｕＯ、
リン酸をＰ2 Ｏ5 に換算してＣｕＯ／Ｐ2 Ｏ5 のモル比
が１．８：１に相当する。さらに、酸化ネオジウム（Ｎ
ｄ2 Ｏ3 ）を９．７重量部加え、充分撹拌した。以下実
施例１と同様にして粉末を得た。粉末の平均粒径は２．
５μｍであった。この粉末を用いて実施例１と同様な操
作で、ペースト状のインクを得た。[Example 2] A solution prepared by diluting 100 parts by weight of 85% phosphoric acid three times with water was heated, and then copper oxide (Cu
O) 62.1 parts by weight was added. This amount of copper is CuO,
Converting phosphoric acid into P 2 O 5 corresponds to a CuO / P 2 O 5 molar ratio of 1.8: 1. Furthermore, neodymium oxide (N
9.7 parts by weight of d 2 O 3 ) was added, and the mixture was sufficiently stirred. A powder was obtained in the same manner as in Example 1 below. The average particle size of the powder is 2.
It was 5 μm. Using this powder, a paste-like ink was obtained in the same manner as in Example 1.
【００２４】このインクを４インチ角のアルミナ基板の
約半面にスクリーン印刷し、乾燥した。乾燥後の印刷膜
厚は約１３μｍであった。印刷部分は無色透明であっ
た。この板による半導体レーザー光線に対する反射率を
実施例１と同様にして測定した結果、印刷部分の反射率
はアルミナ基板の約２０％であった。This ink was screen-printed on about half the surface of a 4-inch square alumina substrate and dried. The printed film thickness after drying was about 13 μm. The printed part was colorless and transparent. The reflectance of the plate with respect to the semiconductor laser beam was measured in the same manner as in Example 1. As a result, the reflectance of the printed portion was about 20% of that of the alumina substrate.
【００２５】［実施例３］酸化ネオジウム（Ｎｄ2 Ｏ
3 ）９．７重量部に代えて炭酸カルシウム８．７重量部
を加えた他は実施例２と同様にして粉末を得た。粉末の
平均粒径は２．７μｍであった。この粉末を用いて実施
例１と同様な操作で、ペースト状のインクを得た。Example 3 Neodymium oxide (Nd 2 O)
3 ) A powder was obtained in the same manner as in Example 2 except that 8.7 parts by weight of calcium carbonate was added instead of 9.7 parts by weight. The average particle size of the powder was 2.7 μm. Using this powder, a paste-like ink was obtained in the same manner as in Example 1.
【００２６】このインクを４インチ角のアルミナ基板の
約半面にスクリーン印刷し、乾燥した。乾燥後の印刷膜
厚は約１４μｍであった。印刷部分は無色透明であっ
た。この板による半導体レーザー光線に対する反射率を
実施例１と同様にして測定した結果、印刷部分の反射率
はアルミナ基板の約２５％であった。This ink was screen-printed on about half of a 4-inch square alumina substrate and dried. The printed film thickness after drying was about 14 μm. The printed part was colorless and transparent. As a result of measuring the reflectance of this plate with respect to the semiconductor laser beam in the same manner as in Example 1, the reflectance of the printed portion was about 25% of that of the alumina substrate.
【００２７】［比較例１］酸化コバルト（ＣｏＯ）を加
えなかった他は実施例１と同様にして粉末を得た。粉末
の平均粒径は２．８μｍであった。この粉末を用いて実
施例１と同様な操作で、ペースト状のインクを得た。[Comparative Example 1] A powder was obtained in the same manner as in Example 1 except that cobalt oxide (CoO) was not added. The average particle size of the powder was 2.8 μm. Using this powder, a paste-like ink was obtained in the same manner as in Example 1.
【００２８】このインクを４インチ角のアルミナ基板の
約半面にスクリーン印刷し、乾燥した。乾燥後の印刷膜
厚は約１５μｍであった。印刷部分はやや緑味を呈して
いた。この板による半導体レーザー光線に対する反射率
を実施例１と同様にして測定した結果、アルミナ基板の
１８％であった。This ink was screen-printed on about half of a 4-inch square alumina substrate and dried. The printed film thickness after drying was about 15 μm. The printed part was a little greenish. The reflectance of the plate with respect to the semiconductor laser beam was measured in the same manner as in Example 1 and the result was 18% of that of the alumina substrate.
【００２９】[0029]
【発明の効果】本発明の近赤外線吸収材料は、無色で、
近赤外線領域での半導体レーザー光線を良好に吸収する
ため、肉眼で判別されずに、半導体レーザー光源を用い
たシステムにより物体、画像として良好に認識できる。The near infrared absorbing material of the present invention is colorless and
Since the semiconductor laser beam in the near-infrared region is well absorbed, the object and the image can be satisfactorily recognized by the system using the semiconductor laser light source without being discriminated by the naked eye.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 山本 峰子 神奈川県横浜市神奈川区羽沢町1150番地 旭硝子株式会社中央研究所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mineko Yamamoto 1150 Hazawa-machi, Kanagawa-ku, Yokohama, Kanagawa Prefecture Asahi Glass Co., Ltd. Central Research Laboratory
Claims (3)
ＣｕＯ／Ｐ2 Ｏ5 のモル比が０．０５〜４である銅含有
リン酸化合物に、コバルト成分、ネオジウム成分、エル
ビウム成分、マグネシウム成分、カルシウム成分、スト
ロンチウム成分、バリウム成分から選ばれた少なくとも
一種を含有する近赤外線吸収材料。1. A CuO of copper, phosphoric acid in terms of P 2 O 5 copper-containing phosphoric acid compound mole ratio of CuO / P 2 O 5 is 0.05 to 4, cobalt component, neodymium component, A near infrared absorbing material containing at least one selected from an erbium component, a magnesium component, a calcium component, a strontium component, and a barium component.
ＣｕＯ／Ｐ2 Ｏ5 のモル比が０．０５〜４である銅含有
リン酸化合物に、コバルト成分、ネオジウム成分または
カルシウム成分を含有し、コバルト成分の含有量はＣｏ
Ｏに換算して０．０１〜５重量％、ネオジウム成分の含
有量はＮｄ2 Ｏ3 に換算して０．１〜２０重量％、カル
シウム成分の含有量はＣａＯに換算して２〜２０重量％
である請求項１の近赤外線吸収材料。Wherein CuO copper, phosphoric acid in terms of P 2 O 5 copper-containing phosphoric acid compound mole ratio of CuO / P 2 O 5 is 0.05 to 4, cobalt component, neodymium component or Contains calcium component, and cobalt component is Co
0.01 to 5% by weight in terms of O, content of neodymium component in terms of Nd 2 O 3 of 0.1 to 20% by weight, content of calcium component in terms of CaO 2 to 20% by weight %
The near infrared absorbing material according to claim 1.
合材とからなり、近赤外線吸収材料の含有量が１０重量
％以上であるインク。3. An ink comprising the near-infrared absorbing material according to claim 1 and a binder, wherein the content of the near-infrared absorbing material is 10% by weight or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1973393A JPH06207161A (en) | 1993-01-12 | 1993-01-12 | Improved near infrared light absorbing material and ink using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1973393A JPH06207161A (en) | 1993-01-12 | 1993-01-12 | Improved near infrared light absorbing material and ink using the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06207161A true JPH06207161A (en) | 1994-07-26 |
Family
ID=12007526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1973393A Pending JPH06207161A (en) | 1993-01-12 | 1993-01-12 | Improved near infrared light absorbing material and ink using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06207161A (en) |
Cited By (13)
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|---|---|---|---|---|
| WO1998025168A1 (en) * | 1996-12-06 | 1998-06-11 | Kureha Kagaku Kogyo Kabushiki Kaisha | Optical filter, apparatus equipped with this filter, eyeglasses lens, heat ray absorption filter and optical fiber |
| WO1998055885A1 (en) * | 1997-06-03 | 1998-12-10 | Kureha Kagaku Kogyo Kabushiki Kaisha | Optical material made of synthetic resin, optical filter, and device, spectacle lens, heat ray absorption filter, and optical fiber each provided with the filter |
| WO2005030898A1 (en) * | 2003-09-26 | 2005-04-07 | Kureha Corporation | Absorptive composition for infrared ray and absorptive resin composition for infrared ray |
| KR100618083B1 (en) * | 2005-01-21 | 2006-08-30 | 한국조폐공사 | Invisible light absorbing material and manufacturing method thereof and ink using same |
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1993
- 1993-01-12 JP JP1973393A patent/JPH06207161A/en active Pending
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|---|---|---|---|---|
| WO1998025168A1 (en) * | 1996-12-06 | 1998-06-11 | Kureha Kagaku Kogyo Kabushiki Kaisha | Optical filter, apparatus equipped with this filter, eyeglasses lens, heat ray absorption filter and optical fiber |
| WO1998055885A1 (en) * | 1997-06-03 | 1998-12-10 | Kureha Kagaku Kogyo Kabushiki Kaisha | Optical material made of synthetic resin, optical filter, and device, spectacle lens, heat ray absorption filter, and optical fiber each provided with the filter |
| WO2005030898A1 (en) * | 2003-09-26 | 2005-04-07 | Kureha Corporation | Absorptive composition for infrared ray and absorptive resin composition for infrared ray |
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| US8362130B2 (en) | 2005-11-25 | 2013-01-29 | Sicpa Holding Sa | IR-absorbing Intaglio ink |
| US8080307B2 (en) | 2005-11-25 | 2011-12-20 | Sicpa Holding Sa | IR-absorbing Intaglio ink |
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| CN102575142A (en) * | 2009-09-30 | 2012-07-11 | 旭硝子株式会社 | Near-infrared absorbing particle, method for producing same, dispersion, and article thereof |
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| JP2015060915A (en) * | 2013-09-18 | 2015-03-30 | セイコーインスツル株式会社 | Optical semiconductor device and manufacturing method of the same |
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