JP2002071664A - Coloring sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coloring sheet easily allowing vivid color identification to an organic solvent such as a chlorine solvent, alcohol and amine even in the presence of water, particularly assuming the case of flowing out in drainage. SOLUTION: The color identification test paper contains at least three kinds of coloring agents and a paper strengthening agent and has the hue of paper in a range of 10.0 R to 10.0 Y in Munsell hue, the brightness of color in a range of 5.0 to 10.0 in Munsell value and saturation in a range of 0.5 to 5.0 in Munsell chroma in a Munsell color system, and further has the bulk density of paper in a range of 0.1 g/cc to 1.0 g/cc, the thickness in a range of 0.1 mm to 0.3 mm and the Steckigt sizing degree of paper 100 sec or longer. The color identification paper turns red when coming in contact with the chlorine solvent, turns yellow when coming in contact with alcohol and turns dark green-blue when coming in contact with amine. The color identification test paper assuming more vivid colors by adding hue adjusting dyes is laminated into a sheet like material to form this coloring sheet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color sheet capable of distinguishing a mist or a liquid chemical. In particular, the present invention relates to a color test paper and a color sheet which can identify a very small amount of chemicals, which are organic solvents having different properties, instantly without using an analyzer or a special technique.

[0002]

2. Description of the Related Art As a device for easily distinguishing a liquid chemical, for example, a PH test paper which can measure the degree of acidity or alkalinity of an aqueous solution is known. In addition, test papers for semi-quantitative measurement of specific ion species in an aqueous solution are commercially available. However, there is no test paper or color sheet capable of instantly identifying the type of the organic solvent.

It is empirical to identify the type of organic solvent based on its color, viscosity, odor, solubility with other compounds, etc., and to identify it by chemical analysis or instrumental analysis. It is.

For example, in a method based on chemical analysis, there is a method in which chlorine-containing organic matter is obtained by collecting Cl ₂ obtained by a flask combustion method and then utilizing an oxidation-reduction reaction. For amines, coloration by quinhydrone can be mentioned, and for alcohols, coloration by coordination compound formation with cerium ammonium nitrate and HNO ₃ is used. In instrumental analysis, it is identified by a chromatographic method or an 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 above-described methods based on chemical analysis and instrumental analysis, in an emergency, for example, when a liquid chemical (organic solvent or the like) flows out in a laboratory or a laboratory, it is unknown what the substance is. In such a case, it is not possible to immediately determine an appropriate measure. When acid or alkali is discharged, an appropriate measure can be taken by measuring the pH with a PH test paper or the like and neutralizing the measure. However, when an organic solvent or the like flows out, the color is not developed by the PH test paper, so that it is difficult to specify a substance and to take an appropriate measure.

In recent years, in order to prevent chemicals from flowing out of business facilities, rapid identification of erroneously leaked chemicals has been desired in order to prevent the outflow of chemicals from business facilities due to the increasing awareness of global environmental conservation.

[0007]

SUMMARY OF THE INVENTION The present invention provides a simple and instantaneous color identification method for solvents such as chlorinated solvents, alcohols, and amines, especially in the presence of water, especially when spilled to wastewater. The present invention provides a color sheet that can be identified.

[0008]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above problems, and as a result, have reached the present invention. That is, it contains at least three colorants and a paper strength agent,
In the Munsell color system, the hue of the paper is Munsell Hue
In the range of 10.0R or more and 10.0Y or less, and the lightness is in the range of 5.0 or more and 10.0 or less in Munsell Value and the saturation is in the range of 0.5 or more and 5.0 or less in Munsell Chroma, and further, the bulk density of paper Is 0.1 g / cc or more;
0 g / cc or less, the thickness is 0.1 mm or more, 0.3 mm or less, the paper Stechig sizing degree is 100 seconds or more, and
Adhesive sheet is made of non-woven fabric or paper based on a color test paper that shows red when contacted with a chlorine-based solvent, yellow when contacted with alcohols, and dark green blue when contacted with amines It is a color sheet characterized by being laminated on the above.

A color test paper characterized in that a powdery colorant having a particle diameter of 100 μm or less and a ratio of 1 μm or less of less than 1% is used as the colorant to be colored.

[0010] When paper is made by the inner surface size method, a slurried mixture of pulp, paper strength enhancer, fixing agent and sizing agent, or precipitant and colorant powder is added, and then a coagulant is added thereto to form a paper. A color test strip is obtained.

It is desirable that PVA as a paper strength enhancer be contained in an amount of 1.0% by weight or more and 10.0% by weight or less. If the content is low, the strength of the paper is low, and if the content is high, there is a problem that the permeation of the target organic solvent is poor and the color development is poor.

The color paper obtained as described above is laminated on a sheet-like material, for example, an adhesive sheet based on paper, nonwoven fabric, film or the like to obtain a color sheet. This laminate can be used by attaching it to clothes, furniture, floors, walls, and the like. When an organic solvent comes into contact with these sheet-like materials, it is possible to determine what kind of solvent the colored material is by coloring.

BEST MODE FOR CARRYING OUT THE INVENTION

The test paper has a hue in the Munsell color system.
10.0R or more, 10.0Y or less, preferably in the range of 5.0YR or more, 5.0Y or less, and the lightness is 5.0 or more, 10.0 or less, preferably, 6.5 or more, 8.5 or less, and the saturation is 0.5
The range is not less than 5.0 and preferably not less than 1.0 and not more than 3.0. Otherwise, there is a problem that the discriminability at the time of coloring is deteriorated.

The color test paper has a bulk density of 0.1 g / c.
c, not less than 1.0 g / cc, preferably 0.3 g / cc
cc or more and 0.6 g / cc or less, and the thickness is 0.1 mm or more and 0.3 mm or less, preferably 0.1 mm or more.
5 mm or more and 0.20 mm or less. The bulk density is 0.
If it is less than 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. or,
There is a problem that paper exceeding 1.0 g / cc is difficult to manufacture. Similarly, it is difficult to manufacture paper having a thickness of less than 0.1 mm, and if the thickness exceeds 0.3 mm, there is a problem that the droplets are difficult to spread.

It is desirable that the color test paper has a paper Stechig sizing degree of at least 100 seconds, preferably at least 200 seconds. If the time is less than 100 seconds, there is a problem that it is difficult to develop a color with a trace amount of solvent when the test paper becomes wet with water.

The following combinations are optimal for the colorant used in the present invention, but are not necessarily limited in the present invention. The fact that color test papers show different colors in different solvents means that 2,5,2 ', 5'TetraMethyl
triphenylmethane-4,4'-Diazo-bis-β-hydroxynaphtoic
anilid (hereinafter abbreviated as TMD), 4- (4'-Phenylazoyl) Phe
nylazo-Phenol (hereinafter abbreviated as PPP) and Ethyl-bis
-(2,4-Dinitrophenyl) acetate (hereinafter abbreviated as EDA).

When the combination of solvents to be identified and identified is a chlorine-based solvent, an alcohol or an amine-based solvent, when the liquid adheres to the color test paper, TMD dissolves only in the chlorine-based solvent and turns red, It informs that the adhering droplet is a chlorine-based solvent. In addition, when the attached liquid is alcohol, the vibration of the electrons makes the PPP deeper, and the color test paper develops a yellow color to notify that the attached droplet is alcohol. Similarly, when the adhering liquid is an amine solvent, the charge is transferred to a benzene ring, so that the color test paper develops a green color to inform that the adhering droplet is an amine solvent.

The amount of the organic solvent used for the coloring paper is at least 0.01 μLt or more. Below this, the determination tends to be difficult, but conversely, the effect is the same if too much is applied. It is sufficient that the organic solvent adheres to the color paper together with the water.

In the color test paper, the colorant has a particle size of 1 μm or more and 100 μm or less, and preferably 5 μm or more and 7 μm or more.
Those having a size of 5 μm or less are desirable. Coloring agent particle size is 100μ
If it exceeds m, the coloration of the trace amount of solvent will be difficult to distinguish, and if it exceeds 1 μm, the background color of the paper will be dark and the lightness will be dark, making it difficult to distinguish the coloration of the trace amount of organic solvent. Cannot obtain the desired color test paper.

Further, the proportion of the colorant having a 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 is difficult to distinguish the coloration of a trace amount of the organic solvent.

The color test paper contains TMD, which is a color former, in an amount of 0.
It is desirable to contain 2% by weight or more and 2.0% by weight or less, 1.0% by weight or more and 10.0% by weight or less of PPP, and 1.0% by weight or more and 10.0% by weight or less of EDA. .
If the content of the coloring agent is small, it is difficult to identify the color when the color is formed, so that it is difficult to identify.If the content is large, the background color of the paper is dark and the lightness is dark, so that a trace amount of the solvent is colored. It is difficult to identify the color test paper, so that the color test paper aimed at by the present invention cannot be obtained.

The color test sheet thus formed is laminated on a pressure-sensitive adhesive sheet made of a nonwoven fabric or paper or the like to form a color sheet. The substrate of the pressure-sensitive adhesive sheet is not particularly limited as long as it is a sheet-like material, and is selected according to the use.

[0023]

Examples are shown below.

[0024] The size of paper is as specified in JIS P8
The measurement was performed based on the “Steechicht sizing degree test method for paper” specified in 122. The higher the value, the higher the water resistance of the paper.

Hue, lightness and saturation are described in JIS Z
The measurement was performed based on the “color display method based on three attributes” defined in 8721.

As a test method of the coloration performance, tetrachloroethylene (drug A) was used in a state where the sample was in a standard state (left at 20 ° C. and 60% RH) and in a state where the sample was wet with water (soaked in water at 20 ° C. for 30 minutes). , Isopropyl alcohol (Chemical B) and dimethylamine (Chemical C) were dropped 0.1 and 0.01 μL, respectively, and the coloring performance was judged as good if the color developed within 5 seconds after dropping was judged as 合格 and the discrimination performance The sample was identified as red, yellow, and green after 5 seconds from the dropping, and was judged as acceptable by ×.

Example 1 50 parts each of NBKP pulp and LBKP pulp having a beating degree of SR-15, a fineness of 1.1 decitex, 3 parts of a fibrous binder (PVA) having a fiber length of 3 mm, and a yellow dye for adjusting hue (bayer japan) After mixing 0.01 parts of RBY7GL (Ray7GL manufactured by Arakawa Chemical Co., Ltd.), 5 parts of aluminum sulfate and 5 parts of white rosin (Size Pine N-771 manufactured by Arakawa Chemical) are mixed in order. next,
After mixing 5 parts of an antifoaming agent (Homeless P0 manufactured by Meisei Chemical Co., Ltd.), the average particle diameter was previously dispersed in water using a dispersant (Disper TL manufactured by Meisei Chemical Co., Ltd.) five times as large as the colorant. 0.7 parts of TMD, 5 parts of PPP, and 5 parts of EDA having a ratio of 0.8% of 25 μm and 1 μm or less are mixed, and finally, 0.2 parts of an anionic polymer flocculant (PAM) is mixed to prepare wet papermaking. Then, a color test sheet having a basis weight of 75 g / m ² was laminated on a pressure-sensitive adhesive sheet using a nonwoven fabric as a base material to prepare a color test sheet.

Example 2 A wet papermaking was performed according to the same formulation as in Example 1, and the basis weight was 100 g / m 2.
A color test sheet of No. ² was prepared, and this was laminated on a pressure-sensitive adhesive sheet using paper as a base material to obtain a color test sheet.

Comparative Example 1 NBK having the same degree of beating degree SR-15 as used in Example 1
50 parts each of P pulp and LBKP pulp, 3 parts of fibrous binder, 0.01 part of yellow dye, 5 parts of sulfuric acid band and 5 parts of white rosin, 5 parts of defoamer, and 5 times dispersant in advance of colorant 25 μm average particle size dispersed in water using
And the ratio of 1 μm or less is 0.8%
Parts, 5 parts of PPP, 5 parts of EDA and 0.2 parts of anionic polymer coagulant are mixed at a time to perform wet papermaking, and the basis weight is 75 g.
/ M ² , and a sheet was prepared in the same manner.

Comparative Example 2 NBK having the same beating degree of SR-15 as used in Example 1
After mixing 50 parts each of P pulp and LBKP pulp, 3 parts of a fibrous binder and 0.01 part of a yellow dye, 5 parts of aluminum sulfate and 5 parts of white rosin are mixed in order. Next, after mixing 5 parts of the defoaming agent, 5
14 μm average particle size dispersed in water using double dispersant
And the ratio of 1 μm or less is 15%
Parts, 5 parts of PPP, and 5 parts of EDA, and finally, 0.2 parts of an anionic polymer flocculant was mixed to perform wet papermaking to prepare a color test paper having a basis weight of 75 g / m ^2. It was created.

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 comparison of the color performance.
Shown in

[0032]

[Table 1]

[0033]

[Table 2]

[0034]

As described above, the color sheet obtained by laminating the color test paper of the present invention and the pressure-sensitive adhesive sheet based on a nonwoven fabric or the like uses three types of colorants and controls the particle size. Due to the hue adjustment, the organic solvent such as a chlorine-based solvent, alcohol, and amine is excellent in color identification. Further, since it has extremely high water resistance, it is possible to color-discriminate a trace amount of an organic solvent even in the presence of a large amount of water, for example, when an organic solvent flows out into drainage or the like.

Claims (4)

[Claims] (1) Water resistance having a bulk density of 0.1 g / cc or more and 1.0 g / cc or less, a thickness of 0.1 mm or more and 0.3 mm or less, a Stechig sizing degree of 100 seconds or more, and an organic solvent. What is claimed is: 1. A color sheet, comprising: a sheet of color paper showing at least one color when contacted; a sheet; and release paper. 2. The color sheet according to claim 1, wherein the color sheet shows different colors when contacted with a chlorine-based solvent, alcohols and amines. 3. The color sheet according to claim 1, wherein a color paper is used that can recognize color when at least 0.01 μLt or more of an organic solvent adheres. 4. The adhesive sheet according to claim 1, wherein the adhesive sheet is made of nonwoven fabric or paper and has a tear strength of 5 kg or less.
A color sheet according to any one of claims 1 to 3.