JP2008026155A - Detector sheet and detector sheet roll - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide detector sheets and detector sheet rolls that are less likely to be polluted by aromatic hydrocarbons before use, and are used for measuring the presence or the concentration of aromatic hydrocarbons. <P>SOLUTION: This detector sheets are such that a plurality of color-developing layers formed independently of each other on one surface of a nonbreathing sheet base material, with the developing layers developing color, in reaction with aromatic hydrocarbon. Furthermore, this detector sheet is such that the developing layers are formed at fixed intervals, in the lengthwise direction of the base material. Furthermore, these detector sheets are such that an inhibiting layer is formed for inhibiting the aromatic hydrocarbons from passing therethrough so as to surround at least the periphery of the developing layers. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a detection sheet and a detection sheet roll for detecting the presence or absence of aromatic hydrocarbons such as benzene, toluene and xylene in the atmosphere.

  In recent years, health hazards caused by chemical substances present in the living environment called “sick house syndrome” have been regarded as a problem. Chemical substances related to sick house syndrome include aromatic hydrocarbons such as formaldehyde, benzene, toluene, and xylene. Of these, aromatic hydrocarbons such as toluene and xylene include adhesives and paint solvents and diluents. In some cases, aromatic hydrocarbons such as high-concentration toluene and xylene are detected in new homes and homes after renovation.

  Standard methods for measuring chemical substances in indoor air that have been used so far are standard measurement methods using gas chromatography and measurement methods that use reagent discoloration. While high-accuracy measurement is possible with an automated measurement method, an expensive and precise analyzer and advanced technology are required, whereas a measurement method that uses reagent discoloration requires an expensive and accurate analyzer. Without use, the concentration of aromatic hydrocarbons can be measured with high selectivity. This latter measurement method is a method of measuring the concentration by passing toluene gas through a glass tube (detection tube) filled with a detection agent (diiodine pentoxide) that changes color by reacting with toluene and reading the color change region. It is.

  Although these measurement methods can obtain accurate measurement results, they require problems such as the need for expensive and precise analyzers and advanced technology, and the use of tools for manually venting a certain amount to the detector tube. There is a rather annoying problem that must be solved, and there is an increasing demand for general consumers and home sellers to easily measure the presence and concentration of chemical substances that are caused by themselves. There is a demand for a new method to replace

  In response to this demand, a detection paper impregnated and dried with a color former (reagent) that reacts with aromatic hydrocarbons in a solid phase such as filter paper, silica sheet, alumina sheet, etc., is used. For example, a method to check the presence or concentration of aromatic hydrocarbons depending on whether the coloring agent (reagent) develops color by placing it in a newly built house or a renovated house and bringing it into contact with the air in the house. (For example, refer to Patent Document 1).

The detection paper disclosed in Patent Document 1 is the same as, for example, a litmus test paper for examining whether an aqueous solution is alkaline or acidic, and is simply impregnated in the solid phase, ie, a state in which the color former (reagent) is exposed to the solid phase. It is completely defenseless against aromatic hydrocarbons (contaminated by aromatic hydrocarbons from all directions), and aromatic carbonization is performed to prevent color development due to contamination until just before use. It is necessary to store it strictly in an environment that is isolated from hydrogen. Also, for example, litmus paper is stored in a sealed container containing multiple strips of detection paper and opened when used. In this case, if aromatic hydrocarbons are present in the environment in which the detection paper is removed, unused detection paper in the sealed container is replaced with aromatic hydrocarbons. There is a problem that is contaminated.
JP 2005-83854 A

  Then, this invention is providing the detection sheet | seat and detection sheet | seat roll which measure the presence or absence and density | concentration of aromatic hydrocarbons which are hard to be polluted by aromatic hydrocarbons at the time of unused.

  In order to achieve the above object, the inventor of the present invention provides a color-developing layer in which the detection sheet of the present invention is colored on one side of a non-breathable sheet substrate by reacting with aromatic hydrocarbons. Are formed in a plurality independently of each other.

  The present invention according to claim 2 is the detection sheet according to claim 1, wherein the color forming layers are formed at regular intervals in a line in the longitudinal direction of the non-breathable sheet base material. Is.

  According to a third aspect of the present invention, in the detection sheet according to any one of the first and second aspects, a deterring layer that inhibits permeation of aromatic hydrocarbons surrounding at least the outer periphery of the coloring layer is formed. It is characterized by being.

  Further, the present invention according to claim 4 is the detection sheet according to any one of claims 1 to 3, wherein the non-breathable sheet base is provided with a non-breathable property via a pressure-sensitive adhesive layer on the other surface of the non-breathable sheet substrate. A release substrate is affixed.

  Further, the present invention according to claim 5 is characterized in that in the detection sheet according to any one of claims 1 to 4, separation means capable of separating the color developing layers one by one is provided. To do.

  In addition, the detection sheet roll of the present invention according to claim 6 is characterized in that the detection sheet according to any one of claims 1 to 5 is wound around a non-breathable core member with the coloring layer inside. It is what.

The detection sheet and detection sheet roll of the present invention are:
By using any one of the above configurations, it is possible to measure the presence or concentration of aromatic hydrocarbons, and from the start, it is assumed that the hydrocarbons are hardly contaminated by aromatic hydrocarbons until the time of use. In addition, the detection sheet of the present invention is non-breathable by sticking a non-breathable release substrate on one side of the detection sheet (single detection sheet) via a pressure-sensitive adhesive layer. Because it can be peeled off from the mold release substrate and fixed to the measurement location where aromatic hydrocarbons are measured with the pressure-sensitive adhesive layer, it can be applied to measurement locations such as ceilings and walls. It has the effect of being able to.

The present invention will be described in detail below with reference to the drawings.
FIG. 1 is a plan view of an embodiment showing a state of the detection sheet according to the present invention, FIG. 2 is an enlarged cross-sectional view of the main part of FIG. 1 shown schematically, and the detection sheet 1 is a non-breathable sheet base. A resin composition in which a color former that reacts with aromatic hydrocarbons is added to one surface of the material 10 is added to the color developing layer A by a known printing method such as a gravure printing method or a silk screen printing method. Are formed in a pattern (in FIG. 1, the coloring layer A is provided in a circular shape at equal intervals in four rows), and a region where the coloring layer A is formed (hereinafter referred to as a coloring region) is formed. A deterring layer B that suppresses permeation (contamination) of aromatic hydrocarbons from the end face of the coloring layer A by registering with the coloring layer A in the entire area (hereinafter referred to as a non-coloring area), Simultaneously formed by the same printing method in which the coloring layer A is formed, and the coloring Detecting sheet in which perforation lines as separating means C for separating A one by one are formed in a direction perpendicular to the longitudinal direction of the non-breathable sheet substrate 10 (left-right direction in FIG. 1) A non-breathable release substrate 30 is attached to the other surface of 1 ′ (hereinafter referred to as a detection single sheet 1 ′) via a pressure-sensitive adhesive layer 20. As an example of the usage method of the detection sheet 1 shown in FIG. 1, although not shown, for example, it was cut into four rows and a predetermined number of meters were wound up in the longitudinal direction (up and down in FIG. 1). It is used as a roll, and is configured such that the single detection sheet 1 ′ can be separated and used one by one along the perforation line as necessary. In this case, a non-breathable core material such as a synthetic resin or a metal, or a surface of the synthetic resin is used with the coloring layer A inside so that the coloring layer A is not exposed on the roll surface. The film is wound into a roll by using a non-breathable core material made of a paper tube covered with a metal layer such as a layer or an aluminum foil.

  1 shows an embodiment in which the suppression layer B is formed in the non-color-development region in all regions except the color-development region where the color-development layer A is formed. It suffices if the permeation (contamination) of aromatic hydrocarbons from the end face of A can be suppressed, and the suppression layer B may be formed so as to surround at least each of the coloring layers A. In FIG. 1, the color forming layer A is provided in a circular shape at equal intervals in four rows, but the number of rows is not limited to this, and may be smaller or larger. In addition, the shape of the coloring layer A is not limited to this, and may be any shape that occupies a certain region, and may be, for example, a polygonal shape such as a triangular shape or a rectangular shape. Is.

Next, various materials constituting the detection sheet 1 of the present invention will be described.
First, as the non-breathable sheet base material 10, a synthetic resin sheet or a metal foil is suitable. However, it is easy to handle or easy to print and form the coloring layer A and the suppression layer B. In view of this, a synthetic resin sheet is preferable, and it is possible to adhere to a resin composition (ink composition) capable of forming the color developing layer A and the inhibiting layer B without using aromatic hydrocarbons as a true solvent or a diluting solvent. Any sheet made of synthetic resin can be used without any particular limitation, but it is excellent in printability and hardly affected by environmental temperature and humidity. For example, polyester, polypropylene, polystyrene, polycarbonate, polyethylene, ABS, etc. are suitable. In particular, a sheet stretched in the biaxial direction is suitable. The thickness of the synthetic resin sheet is 12 μm to 1 mm, and 50 to 400 μm is preferable in consideration of ease of handling and cost. The non-breathable sheet base material 10 is subjected to easy adhesion treatment such as corona discharge treatment, ozone treatment, and plasma treatment on a necessary surface as necessary.

  Next, the resin forming the color forming layer A and the suppression layer B will be described. The resin forming the color forming layer A and the suppression layer B can be used without any particular limitation as long as it does not require the use of aromatic hydrocarbons as a true solvent or a diluent solvent. Examples thereof include nitrified cotton, acrylic-based, ester-based, urethane-based resins obtained by reacting polyol components with isocyanate, and polyvinyl acetal-based resins. Polyvinyl acetal resin that swells in alcohol or water because it is soluble in alcohol or a mixed solvent thereof, such as polyvinyl formal (formal resin), polyvinyl acetoacetal, polyvinyl propional, polyvinyl butyral (butyral resin) , Polyvinyl hexyl, etc., or silico Resin, for example, polydimethylsiloxane (wherein a part of the methyl group is substituted with a functional group such as a vinyl group or a hydroxyl group) as a base polymer, and for example, cross-linking such as polymethylhydrodienesiloxane And additives with platinum or tin-based catalysts, etc., which are made into inks by adding various solvents other than aromatic hydrocarbons, various auxiliary agents, etc. What is necessary is just to print-form by well-known printing methods, such as a screen printing method. The coloring layer A and the suppression layer B are basically the same resin, and the difference is whether or not a coloring agent that reacts with an aromatic hydrocarbon and develops color is added.

  Further, as a color former for forming the color development layer A, a detection solution in which diiodine pentoxide is dissolved in an acidic solution such as phosphoric acid, or piperidine and P-dimethylaminobenzaldehyde in water, alcohol, or a mixture thereof Examples thereof include color formers that react with known aromatic hydrocarbons such as a detection solution dissolved in a solvent to develop color.

Examples of the pressure sensitive adhesive forming the pressure sensitive adhesive layer 20 include natural rubber, acrylic resin, ethylene-vinyl acetate copolymer, vinyl acetate-vinyl chloride copolymer, styrene-butadiene-styrene copolymer. Polymers, styrene-isoprene-styrene copolymers, etc. with rosin derivatives, tackifiers such as terpene resins and fillers and anti-aging agents added can be used. Approximately 15 to 25 g / m ² is appropriate. As a coating method, a known coating method such as a roll coating method or a heat melt extrusion method may be appropriately used.

Examples of the non-breathable release substrate 30 include a sheet made of synthetic resin such as polyethylene, polypropylene, polyester, etc., and, for example, a corona discharge treatment may be performed on one of these surfaces as necessary. After applying the easy adhesion treatment as represented by the above, the silicone resin as described above is applied by a known application method such as a gravure coating method or a roll coating method, and dried as necessary. Examples thereof include a sheet that has been heat-cured later, or a sheet obtained by further embossing the above-described various sheets. In addition, when apply | coating a silicone resin, as an application quantity, 0.1-1.0 g / m < ² > is suitable as solid content.

  Next, as a method of using the detection sheet 1, for example, in the case of FIG. 1, it is used as a roll shape in which a long sheet is cut into four rows and a predetermined number of meters is wound in the long direction. In addition, it is separated from the roll by a separating means and used in a one-piece unit, for example, affixed to a wall or ceiling, etc. Also, the long sheet shown in FIG. It is used as a one-piece shape with one A and a deterrent layer B around it. Further, in FIG. 1, the perforation line as the separating unit C is provided only in one direction, but the separating unit C may be provided in a lattice shape. The detection sheet 1 may take various forms. Further, the separating means C is not limited to the perforation line, and may be, for example, a linear half cut (half cut line). In the examples, the detection single sheet 1 ′ is laminated with a non-breathable release substrate 30 via the pressure-sensitive adhesive layer 20, but only the detection single sheet 1 ′ is described above. It can be used in various modes.

  In addition, the sensor sheet 1 and the detection single sheet 1 ′ are exposed to an aromatic hydrocarbon, for example, in a toluene atmosphere having various known concentrations for a certain period of time to cause the sensor to read the color density and perform calibration. It is also possible to measure the density at the measurement point by preparing a line and comparing the calibration curve with the color density of the detection sheet 1 or the detection single sheet 1 ′ measured and colored at the measurement point. .

It is a top view of one Example which shows the state at the time of manufacture of the detection paper concerning this invention. It is a principal part expanded sectional view of FIG. 1 shown graphically.

Explanation of symbols

1 Detection sheet 1 'Detection sheet (Detection single sheet)
DESCRIPTION OF SYMBOLS 10 Non-breathable sheet base material 20 Pressure sensitive adhesive layer 30 Release base material A Color development layer B Inhibition layer C Separation means

Claims (6)

A detection sheet, wherein a plurality of color-developing layers that react with aromatic hydrocarbons to form a color are independently formed on one surface of a non-breathable sheet substrate. The detection sheet according to claim 1, wherein the color-developing layers are formed at regular intervals in a line in the longitudinal direction of the non-breathable sheet base material. The detection sheet according to claim 1, wherein a deterring layer for inhibiting permeation of aromatic hydrocarbons surrounding at least the outer periphery of the coloring layer is formed. The non-breathable release base material is pasted on the other surface of the non-breathable sheet base material via a pressure-sensitive adhesive layer. Detection sheet. The detection sheet according to any one of claims 1 to 4, further comprising a separation unit capable of separating the color developing layers one by one. A detection sheet roll, wherein the detection sheet according to any one of claims 1 to 5 is wound around a non-breathable core member with the color forming layer inside.

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