JP3775567B2 - Colored paper and method for producing the same - Google Patents
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Description
【０００１】
【発明の属する技術分野】
本発明は、ミストや液滴状の薬品が識別できる試験紙に関するものである。
特に、性状の異なる有機溶剤である薬品の種別を分析機器や特殊な技術を用いずに瞬時に同定できる試験紙に関する。
【０００２】
【従来の技術】
液状の薬品を簡便に識別するものとして、例えば水溶液の酸性やアルカリ性の度合いを測定できるＰＨ試験紙などが知られている。また、水溶液中の特定のイオン種を半定量的に測定する試験紙なども市販されている。しかしながら、有機溶剤に関して、その溶剤の種類を瞬時に同定できる試験紙はない。
【０００３】
有機溶剤種の同定には、経験的にその色、粘性、臭い、他の化合物との溶解性などによって見当を付け、その後に化学分析や機器分析等により同定を行っているのが実状である。
【０００４】
たとえば、化学分析による方法では、塩素含有有機物のフラスコ燃焼法で得たＣｌ2を捕集後、酸化還元反応を利用する方法がある。アミンに対してはキンヒドロンによる呈色方法が挙げられる。またアルコールに対しては、硝酸セリウムアンモニウムとＨＮＯ3酸性で配位化合物形成による呈色が利用される。機器分析ではクロマトグラフ法や吸光法などによって同定される。しかしながら、係る方法の分析によると試験機器や設備が必要となり、容易にかつ速やかに同定することは困難である。
【０００５】
上記に示したような化学分析や機器分析による方法では、緊急時、例えば研究室や実験室等において液状の薬品（有機溶剤など）を流出した際、その物質が何であるか不明の場合には適切な対策を速やかに判断できない。酸やアルカリを流出した場合には、ＰＨ試験紙等でＰＨを測定して、中和する事により適切な対策を打つことが可能となる。しかしながら、有機溶剤などが流出した場合には、ＰＨ試験紙では呈色しないため、物質の特定ができずに適切な対策を打つことが困難である。
【０００６】
近年地球環境保全意識の高まりより、薬品類の事業設備外への流出を防ぐために、誤って流出した薬品の迅速な処置をする必要から、流出物の容易で速やかな同定手段が望まれている。
【０００７】
【発明が解決しようとする課題】
本発明は塩素系溶剤やアルコール、アミンなどの溶剤に対して、特に排水に流出した場合を想定して水の存在下においても、簡易に瞬時に呈色識別（同定）できる呈色試験紙を提供するものである。
【０００８】
【課題を解決するための手段】
前記課題を解決するために本発明者らは鋭意検討の結果、本発明に至った。即ち、少なくとも３種の呈色剤、及び紙力増強剤を含み、マンセル表色系において、紙の色相がマンセルＨｕｅで10.0R以上、10.0Y以下の範囲であって、かつ明度がマンセルＶａｌｕｅで5.0以上、10.0以下の範囲でかつ、彩度がマンセルＣｈｒｏｍａで0.5以上、5.0以下の範囲であることを特徴とする呈色試験紙であり、さらには紙のかさ密度が０．１ｇ／cc以上、１．０ｇ／cc以下、厚さが０．１ｍｍ以上、０．３ｍｍ以下、紙のステキヒト・サイズ度が１００秒以上でかつ、塩素系溶剤と接触した際には赤色に、アルコール類と接触した際には黄色を、及びアミン類と接触した際には暗緑青色を呈することを特徴とする呈色試験紙である。
【０００９】
さらに、呈色する呈色剤として、粒径１００μｍ以下でかつ１μｍ以下の比率が１％未満である粉体状の呈色剤を用いることを特徴とする呈色試験紙である。
【００１０】
また、内面サイズ法により抄紙するに際して、パルプと紙力増強剤と定着剤とサイズ剤並びに沈殿剤と呈色剤粉体とを混合スラリーとした後、凝集剤を添加して抄紙することを特徴とする請求項１記載の呈色試験紙の製造方法に関するものである。
【００１１】
紙力増強剤であるＰＶＡは１．０重量％以上、１０．０重量％以下、含有していることが望ましい。含有量が少ないと紙の強度が弱く、含有量が多いと対象とする有機溶剤の浸透性が悪く発色性が悪くなるといった問題がある。
【００１２】
【発明の実施の形態】
試験紙はマンセル表色系において、色相が10.0R以上、10.0Y以下好ましくは、5.0YR以上、5.0Y以下の範囲であって、かつ明度が5.0以上、10.0以下、好ましくは、6.5以上、8.5以下の範囲でかつ、彩度が0.5以上、5.0以下、好ましくは1.0以上、3.0以下の範囲である。それ以外の場合には呈色した際の識別性が悪くなると傾向がある。
【００１３】
呈色試験紙は紙のかさ密度が０．１ｇ／cc、以上、１．０ｇ／cc以下、好ましくは、０．３ｇ／ｃｃ以上、０．６ｇ／ｃｃ以下の範囲であって、厚さが０．１ｍｍ以上、０．３ｍｍ以下、好ましくは、０．１５ｍｍ以上、０．２０ｍｍ以下である。かさ密度が０．１ｇ／cc未満の場合、紙強度が不足すると共に、同定すべき薬剤の微少液滴が付着した場合に、液滴が広がらず、結果として液滴を識別することができなくなる。又、１．０ｇ／ccを越える紙は製造が困難な傾向になる。同様に、紙の厚さが０．１ｍｍ未満の紙は製造が困難であり、０．３ｍｍを越える場合は液滴が広がりにくいといった問題がある。
【００１４】
又、呈色試験紙は紙のステキヒト・サイズ度が１００秒以上、好ましくは、２００秒以上であることが望ましい。１００秒未満の場合は試験紙が水に濡れた際に極微量の溶剤で呈色する事が困難な傾向になる。
【００１５】
本発明で用いる呈色剤は、次に示す組み合わせが最適であるが、本発明において必ずしも制限されるものではない。
呈色試験紙が異なる溶剤に異なる呈色を示すことは、呈色剤として2,5,2',5'TetraMethyltriphenylmethane-4,4'-Diazo-bis-β-hydroxynaphtoic anilid（以下ＴＭＤと略す）、4-(4'-Phenylazoyl)Phenylazo-Phenol（以下ＰＰＰと略す）並びに、Ethyl-bis-(2,4-Dinitrophenyl)Acetate（以下ＥＤＡと略す）を含有することで得られる。
【００１６】
同定識別すべき溶剤の組み合わせを塩素系溶剤、アルコール類及びアミン系溶剤とした場合は液体が呈色試験紙に付着した際にＴＭＤは塩素系溶剤にのみ溶解し赤変して、付着した液滴が塩素系溶剤であることを知らしめる。また、付着した液体がアルコール類の場合は電子の振動によりＰＰＰを深色化し、呈色試験紙が黄色の発色をして付着した液滴がアルコール類であることを知らしめる。同様に、付着した液体がアミン系溶剤の場合は電荷がベンゼン環に遷移することにより、呈色試験紙が緑色の発色をして付着した液滴がアミン系溶剤であることを知らしめる。
【００１７】
この呈色試験紙に接触する有機溶剤の量は、少なくとも０．０１μLt以上であれば十分である。これ以下では判定が困難になる傾向があるが、逆に多くつきすぎても効果は同じとなる。この有機溶剤が水とともに呈色紙に付着するだけで十分である。
【００１８】
呈色試験紙は、呈色剤の粒径が１μｍ以上、１００μｍ以下でかつ、好ましくは、５μｍ以上７５μｍ以下のものが望ましい。呈色剤の粒径が１００μｍを越えると、極微量溶剤の呈色が識別困難となり、また１μｍ以下を越えると紙の地色が濃くかつ明度が暗くなるために極微量有機溶剤の呈色を識別困難となるので本発明の目的とする呈色試験紙を得ることができない。
【００１９】
さらに、呈色剤の粒径が１μｍ以下の占める割合が、１％未満、好ましくは、０％である。１％以上の場合、紙の地色が濃くかつ明度が暗くなり極微量の有機溶剤の呈色の識別が困難となる。
【００２０】
呈色試験紙は、呈色剤であるＴＭＤを０．２重量％以上、２．０重量％以下、ＰＰＰを１．０重量％以上、１０．０重量％以下、ＥＤＡを１．０重量％以上、１０．０重量％以下含有していることが望ましい。呈色剤の含有量が少ないと呈色した際の呈色が薄いために識別が困難となり、含有量が多いと紙の地色が濃くかつ明度が暗くなるために極微量の溶剤の呈色を識別困難となるので本発明の目的とする呈色試験紙を得ることができない。
【００２１】
【実施例】
以下に実施例を示す。
【００２２】
紙のステキヒト・サイズ度はＪＩＳ Ｐ８１２２で定められた『紙のステキヒト・サイズ度試験法』に基づき測定した。この値が大きい程、紙の耐水性が高いことを示す。
【００２３】
色相、明度、彩度については、ＪＩＳ Ｚ８７２１で定められた『三属性による色の表示方法』に基づき測定した。
【００２４】
呈色性能の試験方法として、サンプルが標準状態（２０℃、ＲＨ６０％に放置）と水に濡れた状態（２０℃の水に３０分間浸漬させておく）で、テトラクロロエチレン（薬品Ａ）、イソプロピルアルコール（薬品Ｂ）、ジメチルアミン（薬品Ｃ）をそれぞれ０．１及び０．０１μLt滴下して、発色性能は滴下後５秒以内に発色したものを合格として○×で判定し、識別性能は滴下５秒後に赤色、黄色、緑色に識別できたものを合格として○×で判定した。
【００２５】
実施例 １
叩解度ＳＲ−１５のＮＢＫＰパルプとＬＢＫＰパルプを各５０部、繊度１．１デシテックス、繊維長３mmの繊維状バインダー（ＰＶＡ）３部、色相調整用の黄色染料（bayer japan製のR.B.Y.7GL）０．０１部を混合した後、硫酸アルミニウム５部と白色ロジン（荒川化学製のサイズパインＮ−７７１）５部を順に混合する。次に、ここに消泡剤（明成化学製のホームレスＰ０）５部を混合させた後、あらかじめ呈色剤の５倍の分散剤（明成化学製のディスパーＴＬ）を用いて水中に分散させた平均粒径２５μｍでかつ１μｍ以下の比率が０．８％であるＴＭＤ０．７部、ＰＰＰ５部、ＥＤＡ５部を混合し、最後にアニオン系高分子凝集剤（ＰＡＭ）０．２部を混合して湿式抄紙を行い、坪量７５ｇ／ｍ2の呈色試験紙を作成した。
【００２６】
実施例 ２
実施例１と同処方で湿式抄紙を行い、坪量１００ｇ／ｍ2の呈色試験紙を作成した。
【００２７】
比較例 １
実施例１で使用したのと同じ叩解度ＳＲ−１５のＮＢＫＰパルプとＬＢＫＰパルプを各５０部、繊維状バインダー３部、黄色染料０．０１部、硫酸バンド５部と白色ロジン５部並びに消泡剤５部、さらにあらかじめ呈色剤の５倍の分散剤を用いて水に分散させた平均粒径２５μｍでかつ１μｍ以下の比率が０．８％であるＴＭＤ０．７部、ＰＰＰ５部、ＥＤＡ５部とアニオン系高分子凝集剤０．２部を一度に混合して湿式抄紙を行い、坪量７５ｇ／ｍ2の呈色試験紙を作成した。
【００２８】
比較例 ２
実施例１で使用したのと同じ叩解度ＳＲ−１５のＮＢＫＰパルプとＬＢＫＰパルプを各５０部、繊維状バインダー３部、黄色染料０．０１部を混合した後、硫酸アルミニウム５部と白色ロジン５部を順に混合する。次に、ここに消泡剤５部を混合させた後、あらかじめ呈色剤の５倍の分散剤を用いて水中に分散させた平均粒径１４μｍでかつ１μｍ以下の比率が１５％であるＴＭＤ０．７部、ＰＰＰ５部、ＥＤＡ５部を混合し、最後にアニオン系高分子凝集剤０．２部を混合して湿式抄紙を行い、坪量７５ｇ／ｍ2の呈色試験紙を作成した。
【００２９】
上記実施例１と２及び比較例１と２の呈色試験紙の性量を表１に、呈色性能を比較した結果を表２に示す。
【００３０】
【表１】
【表２】
【発明の効果】
以上説明したように、本発明の呈色試験紙は３種類の呈色剤を使用し、その粒径制御や色相調整により塩素系溶剤、アルコール、アミンなどの有機溶剤の呈色識別性に非常に優れている。又、非常に高い耐水性を有しているために排水等に有機溶剤が流出した場合など多量の水の存在下においても極微量の有機溶剤を呈色識別することが可能である。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a test paper that can identify mist and liquid chemicals.
In particular, the present invention relates to a test paper that can instantly identify the types of chemicals, which are organic solvents having different properties, without using analytical instruments or special techniques.
[0002]
[Prior art]
For example, a PH test paper that can measure the degree of acidity or alkalinity of an aqueous solution is known as one that easily identifies liquid chemicals. In addition, a test paper for semiquantitatively measuring a specific ionic species in an aqueous solution is also commercially available. However, there is no test paper that can instantly identify the type of organic solvent.
[0003]
The identification of organic solvent species is empirically based on their color, viscosity, odor, solubility with other compounds, etc., followed by identification by chemical analysis or instrumental analysis. .
[0004]
For example, as a method based on chemical analysis, there is a method of using an oxidation-reduction reaction after collecting Cl 2 obtained by a flask combustion method of a chlorine-containing organic substance. For amines, a coloration method using quinhydrone can be mentioned. For alcohol, the coloration by the formation of a coordination compound is used with ceric ammonium nitrate and HNO 3 acid. In the instrumental analysis, it is identified by chromatographic method or absorption method. However, according to the analysis of such a method, test equipment and facilities are required, and it is difficult to identify easily and quickly.
[0005]
In the case of an emergency, for example, in the case of an emergency, for example, when a liquid chemical (such as an organic solvent) is spilled in a laboratory or laboratory, it is unclear what the substance is. Appropriate measures cannot be determined promptly. When acid or alkali flows out, an appropriate measure can be taken by measuring and neutralizing PH with a PH test paper or the like. However, when an organic solvent or the like flows out, the PH test paper does not color, so that it is difficult to identify the substance and take appropriate measures.
[0006]
In recent years, with the growing awareness of global environmental conservation, in order to prevent chemicals from leaking out of business facilities, it is necessary to take quick measures for chemicals that have been accidentally spilled. .
[0007]
[Problems to be solved by the invention]
The present invention provides a color test paper that can easily and instantly identify (identify) a color even in the presence of water, assuming that it has flowed into wastewater, for solvents such as chlorinated solvents, alcohol, and amines. It is to provide.
[0008]
[Means for Solving the Problems]
In order to solve the above problems, the present inventors have intensively studied to arrive at the present invention. That is, it contains at least three colorants and a paper strength enhancer. In the Munsell color system, the hue of the paper is in the range of 10.0 R or more and 10.0 Y or less in Munsell Hue, and the lightness is Munsell Value. A colored test paper having a range of 5.0 or more and 10.0 or less and a chroma in the range of 0.5 or more and 5.0 or less in Munsell Chroma. Furthermore, the bulk density of the paper is 0.1 g / cc or more. 1.0 g / cc or less, thickness is 0.1 mm or more, 0.3 mm or less, and the paper has a Steecht size of 100 seconds or more. When it comes into contact with a chlorinated solvent, it turns red and comes into contact with alcohols. It is a color test paper characterized by exhibiting a yellow color when it is applied, and a dark green blue color when contacting with amines.
[0009]
Furthermore, the color test paper is characterized in that a powder color developer having a particle diameter of 100 μm or less and a ratio of 1 μm or less is less than 1% is used as a colorant to be colored.
[0010]
In addition, when making paper by the inner surface size method, pulp, paper strength enhancer, fixing agent, sizing agent, precipitating agent and colorant powder are mixed into slurry, and then flocculant is added to make paper The method for producing a colored test paper according to claim 1.
[0011]
The PVA as a paper strength enhancer is desirably contained in an amount of 1.0% by weight or more and 10.0% by weight or less. When the content is small, the strength of the paper is weak, and when the content is large, there is a problem that the permeability of the target organic solvent is poor and the color development is poor.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
In the Munsell color system, the test paper has a hue of 10.0R or more and 10.0Y or less, preferably 5.0YR or more and 5.0Y or less, and a lightness of 5.0 or more and 10.0 or less, preferably 6.5 or more, 8.5 The saturation is 0.5 or more and 5.0 or less, preferably 1.0 or more and 3.0 or less in the following range. In other cases, there is a tendency that the distinguishability at the time of coloring becomes worse.
[0013]
The color test paper has a bulk density of 0.1 g / cc or more and 1.0 g / cc or less, preferably 0.3 g / cc or more and 0.6 g / cc or less, and has a thickness of It is 0.1 mm or more and 0.3 mm or less, preferably 0.15 mm or more and 0.20 mm or less. When the bulk density is less than 0.1 g / cc, the paper strength is insufficient, and when a small droplet of the drug to be identified adheres, the droplet does not spread, and as a result, the droplet cannot be identified. . Also, paper exceeding 1.0 g / cc tends to be difficult to manufacture. Similarly, it is difficult to produce a paper having a thickness of less than 0.1 mm, and when it exceeds 0.3 mm, there is a problem that the droplets are difficult to spread.
[0014]
In addition, it is desirable that the colored test paper has a paper sizing degree of 100 seconds or more, preferably 200 seconds or more. When the time is less than 100 seconds, it tends to be difficult for the test paper to be colored with a very small amount of solvent when wet.
[0015]
The color combinations used in the present invention are optimally combined as shown below, but are not necessarily limited in the present invention.
2,5,2 ', 5'TetraMethyltriphenylmethane-4,4'-Diazo-bis-β-hydroxynaphtoic anilid (hereinafter abbreviated as TMD) , 4- (4′-Phenylazoyl) Phenylazo-Phenol (hereinafter abbreviated as PPP) and Ethyl-bis- (2,4-Dinitrophenyl) Acetate (hereinafter abbreviated as EDA).
[0016]
When the combination of solvents to be identified and identified is a chlorinated solvent, alcohol and amine solvent, the TMD dissolves only in the chlorinated solvent and turns red when the liquid adheres to the colored test paper. Inform the drop that it is a chlorinated solvent. If the adhering liquid is an alcohol, the color of the PPP is deepened by the vibration of electrons, and the colored test paper is colored yellow to inform that the adhering droplet is an alcohol. Similarly, when the adhering liquid is an amine solvent, the charge transitions to the benzene ring, so that the colored test paper is colored green to inform that the adhering droplet is an amine solvent.
[0017]
It is sufficient that the amount of the organic solvent in contact with the color test paper is at least 0.01 μLt or more. Below this, the determination tends to be difficult, but on the contrary, the effect is the same if too much is applied. It is sufficient that the organic solvent adheres to the colored paper together with water.
[0018]
The color test paper has a colorant particle diameter of 1 μm or more and 100 μm or less, and preferably 5 μm or more and 75 μm or less. If the particle size of the colorant exceeds 100 μm, the coloration of the trace amount solvent becomes difficult to distinguish, and if it exceeds 1 μm, the background color of the paper becomes dark and the lightness becomes dark. Since it becomes difficult to identify, it is impossible to obtain the color test paper that is the object of the present invention.
[0019]
Furthermore, the proportion of the colorant particle size of 1 μm or less is less than 1%, preferably 0%. If it is 1% or more, the background color of the paper is dark and the brightness is dark, and it becomes difficult to identify the coloration of a trace amount of organic solvent.
[0020]
The color test paper is 0.2% by weight or more and 2.0% by weight or less of TMD as a colorant, 1.0% by weight or more and 10.0% by weight or less of PPP, and 1.0% by weight of EDA. The content is preferably 10.0% by weight or less. If the content of the colorant is low, the coloration at the time of coloration is thin, making it difficult to distinguish. If the content is high, the background color of the paper is dark and the brightness becomes dark, so a very small amount of solvent is colored. Therefore, it is difficult to identify the color test paper.
[0021]
【Example】
Examples are shown below.
[0022]
The degree of sizing of paper was measured based on the “Testing method for sizing and sizing of paper” defined in JIS P8122. The larger this value, the higher the water resistance of the paper.
[0023]
Hue, lightness, and saturation were measured based on “color display method using three attributes” defined in JIS Z8721.
[0024]
As a test method of coloration performance, tetrachloroethylene (chemical A), isopropyl alcohol in a standard state (20 ° C, left in 60% RH) and wet in water (soaked in water at 20 ° C for 30 minutes) (Chemical B) and dimethylamine (Chemical C) were added dropwise in 0.1 and 0.01 μLt, respectively, and the color development performance was determined as ◯ × if the color developed within 5 seconds after the addition, and the discrimination performance was 5 drops. Those that could be identified as red, yellow, and green after 2 seconds were judged as ◯.
[0025]
Example 1
50 parts each of NBKP pulp and LBKP pulp having a beating degree of SR-15, 3 parts of a fibrous binder (PVA) having a fineness of 1.1 dtex and a fiber length of 3 mm, a yellow dye for adjusting the hue (RBY7GL from Bayer Japan) 0. After mixing 01 parts, 5 parts of aluminum sulfate and 5 parts of white rosin (size pine N-771 manufactured by Arakawa Chemical) are mixed in order. Next, 5 parts of an antifoaming agent (Homeless P0 made by Meisei Chemical Co., Ltd.) was mixed here, and then dispersed in water in advance using a dispersing agent (Disper TL made by Meisei Chemical Co., Ltd.) 5 times the color former. TMD 0.7 parts, PPP 5 parts, EDA 5 parts with an average particle size of 25 μm and a ratio of 1 μm or less of 0.8% are mixed, and finally 0.2 part of anionic polymer flocculant (PAM) is mixed. Wet paper making was performed to prepare a colored test paper having a basis weight of 75 g / m 2 .
[0026]
Example 2
Wet papermaking was carried out with the same formulation as in Example 1 to produce a colored test paper having a basis weight of 100 g / m 2 .
[0027]
Comparative Example 1
50 parts each of NBKP pulp and LBKP pulp having the same beating degree SR-15 used in Example 1, 3 parts of fibrous binder, 0.01 part of yellow dye, 5 parts of sulfuric acid band and 5 parts of white rosin and antifoaming 5 parts of TMD 0.7 parts, PPP 5 parts, EDA 5 parts with an average particle diameter of 25 μm and a ratio of 1 μm or less of 0.8% dispersed in water using a dispersant 5 times the colorant in advance And 0.2 part of an anionic polymer flocculant were mixed at a time to perform wet papermaking to prepare a color test paper having a basis weight of 75 g / m 2 .
[0028]
Comparative Example 2
After mixing 50 parts each of NBKP pulp and LBKP pulp having the same beating degree SR-15 used in Example 1, 3 parts of fibrous binder and 0.01 part of yellow dye, 5 parts of aluminum sulfate and white rosin 5 Mix the parts in order. Next, after mixing 5 parts of antifoaming agent here, TMD0 having an average particle size of 14 μm and a ratio of 1 μm or less of 15% dispersed in water by using a dispersant 5 times the color former in advance is 15%. 7 parts, 5 parts of PPP and 5 parts of EDA were mixed, and finally 0.2 part of anionic polymer flocculant was mixed to perform wet paper making to prepare a color test paper having a basis weight of 75 g / m 2 .
[0029]
Table 1 shows the properties of the color test papers of Examples 1 and 2 and Comparative Examples 1 and 2, and Table 2 shows the results of comparing the color performance.
[0030]
[Table 1]
[Table 2]
【The invention's effect】
As described above, the color test paper of the present invention uses three types of colorants, and has excellent color discrimination characteristics of organic solvents such as chlorinated solvents, alcohols and amines by controlling the particle size and adjusting the hue. Is excellent. In addition, since it has very high water resistance, it is possible to color and identify a very small amount of organic solvent even in the presence of a large amount of water, such as when the organic solvent flows into drainage or the like.
Claims (4)
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| JP2000254379A JP3775567B2 (en) | 2000-08-24 | 2000-08-24 | Colored paper and method for producing the same |
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| JP2005201220A Division JP4240318B2 (en) | 2005-07-11 | 2005-07-11 | Colored paper and method for producing the same |
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