JPH0547774B2 - - Google Patents

Description

[Detailed description of the invention]

<Industrial Application Field> The present invention relates to a dose measurement sheet for energy rays such as ultraviolet rays, visible rays, X-rays, and electron beams. <Prior art> Treatment processes using energy rays such as ultraviolet rays, visible rays, X-rays, and electron beams are used to treat paints, printing plates,
Manufacture of photoresists, adhesives, film hard coatings, adhesives, foamed polyolefins,
It has been put into practical use in a variety of industries, including sterilization of medical instruments and sterilization of food and drinking water. In such an energy beam treatment process, the irradiation dose is the most fundamental factor, and various dosimeters have been put into practical use. Among these, so-called label dosimeters that change color according to the dose and measure the irradiation dose from the degree of discoloration have features such as simplicity and speed that enable visual evaluation of the irradiation dose. <Problems to be Solved by the Invention> However, conventional label-type dosimeters require that the energy irradiation source be activated in order to determine the degree of discoloration of the label due to the action of energy rays based on the light reflected from the label. When measuring, it was necessary for the energy irradiation source and the observer to be located on the same side of the label with respect to the discolored side. For this reason, the electron beam
In work using energy irradiation sources such as X-rays, it has been difficult to measure on the line, especially to measure the cumulative amount of irradiation over time on the line. Furthermore, when storing a discolored label, there is a problem in that the degree of discoloration changes due to exposure to external light such as indoor light. <Means for Solving the Problems> The present invention provides a novel energy ray dose measurement sheet that improves the problems of the label-type energy ray dosimeter described above and satisfies the required performance. The present inventor has completed the present invention as a result of intensive research into energy ray dose measurement sheets that include an active layer that develops, discolors, or fades due to the action of energy rays such as ultraviolet rays, visible rays, X-rays, and electron beams. . That is, the first invention of the present application provides, on at least one side of a support, an active layer composed of at least one of a coloring layer, a color-changing layer, and a fading layer that causes a color change by the action of energy rays. , an energy absorbing layer provided on both outermost layers, the coloring layer containing at least one kind of initiator selected from organic halogen low-molecular compounds or aromatic onium salts. The second invention of the present invention is a measurement sheet, and the second invention of the present application includes a coloring layer that causes a color change due to the action of energy rays on at least one side of the energy ray absorbing support.
A sheet in which an active layer and an energy ray absorbing layer are successively laminated, each consisting of at least one of a color changing layer or a fading layer, wherein the coloring layer is selected from organic halogen low molecular weight compounds or aromatic onium salts. This is an energy ray dosimetry sheet characterized by containing at least one type of initiator. The details of the present invention will be explained below. First, the structure of the energy ray dose measurement sheet of the present invention will be described. FIGS. 1 and 2 show the structure of an energy ray dose measurement sheet according to the first aspect of the present invention. That is, FIG. 1 shows an example of a sheet in which an active layer 1 and an energy ray absorbing layer 2 are laminated on a support 4, and an energy ray absorbing layer 3 is provided on the other side of the support. FIG. 2 also shows active layers 1 and 1' having different sensitivities to energy rays on both sides of the support 4.
, and energy ray absorbing layers 2 and 3 are further provided on each active layer. In this case, active layers with different sensitivities to energy rays refer to, for example, different color development rates, a combination of color development and fading, or a combination of different color fading rates. Next, FIGS. 3 to 5 relate to the second aspect of the present invention. That is, FIG. 3 shows an active layer 1 and an energy ray absorbing layer 2 on an energy ray absorbing support 5.
In addition, in FIG. 4, two types of active layers 1 and 1' having different sensitivities to energy rays are laminated on an energy ray absorbing support 5, and on top of this, energy rays are applied. FIG. 5 shows an example of a sheet provided with an absorbing layer 2. Furthermore, FIG. Energy ray absorption layers 2 and 3 are provided on the layers. In addition, in FIGS. 1 to 5, the energy ray absorption layer 2 provided as the outermost layer is an absorption layer that adjusts the dose of energy rays emitted from the energy ray irradiation source to be measured and incident on the active layer 1. One of the energy ray absorption layers 3 is an absorption layer that controls energy rays other than the energy rays to be measured from entering the active layer. In order to determine the degree of color development, discoloration, or discoloration of the active layer via the energy ray absorption layer 3, the energy ray absorption layer 3 needs to be transparent to at least a portion of visible light. On the other hand, when the measurement location is indoors, the energy rays that can enter the active layer from the energy ray absorption layer 3 side include indoor light and external light such as sunlight entering through a window. It has the function of effectively preventing energy rays from reaching the active layer. As a result, color development, discoloration, fading, etc. of the measurement sheet due to the action of external light can be prevented.
To measure the energy ray dose, for example, the energy ray absorbing layer 2 in FIG. 1 is placed in the direction of the irradiation source, and the degree of discoloration is determined from the side of the energy ray absorbing layer 3 in FIG. 1. Next, the constituent materials of the present invention will be described. The active layer of the present invention is a layer composed of at least one of a color-forming layer, a color-changing layer, and a fading layer that causes a color change by the action of energy rays such as ultraviolet rays, visible rays, X-rays, and electron beams. Conventionally known techniques can be used for such compositions. The coloring layer that develops color by the action of energy rays includes an initiator that generates active species such as free radicals or acids by the action of energy rays, and a coloring agent that develops color by interaction with the active species. A combination of these can be used. Initiators that generate free radicals include organic halogen low-molecular compounds, such as carbon tetrabromide, 1,
1,1-tris(bromomethyl)propane, phenyltribromomethylsulfone, p-nitrophenyltribromomethylsulfone, 2,4-dichlorophenyltrichloromethylsulfone, hexabromomethylsulfoxide, hexabromodimethylsulfone, 4.4 Examples include -dibromo-2,3-hexanedione, 4-phenoxy-dichloroacetophenone, and o-nitro-α,α,α-tribromoacetophenone. Acid-generating initiators include aromatic onium salts such as diphenyliodonium tetrafluoroborate, diphenyliodonium hexafluorophosphate, triphenylsulfonium hexafluorophosphate, bis(4-methoxyphenyl)phenyl Examples include sulfonium hexafluorophosphate. In addition, coloring agents include triphenylmethane, fluoran, rhodamine lactam, phenothiazine,
Phthalide compounds, such as bis(4-dimethylaminophenyl) phenylmethane (leucomalachite green), tris(4-dimethylaminophenyl) phenylmethane (leuco crystal violet), bis(4-diethylamino-2-methylphenyl) phenylmethane , bis(4-diethylamino-2-methoxyphenyl)phenylmethane, tris(4-diethylamino-2-methylphenyl)methane, bis(4-dibenzylamino-2-methylphenyl)phenylmethane, 4-methoxyphenyl-bis(1 -ethyl-2-methylindol-3-yl)methane, phenyl-bis(1-n-butyl-2-methylindol-3-yl)
yl) methane, 3-diethylaminobenzo[a]
-fluorane, 3-dimethylamino-6-methyl-7-chlorofluorane, 3-cyclohexylamino-6-chlorofluorane, 3-(N-methyl-N-phenylamino)-6-(N-ethyl-N-
p-tolylamino)fluoran, 3-diethylamino-7-chlorofluoran, 3-dimethylamino-6-methyl-7-chlorofluoran, 3-
(N-cyclohexyl-N-methylamino)-6-
Methyl-7-anilinofluorane, 3-pyrrolidino-6-methyl-7-anilinofluorane, 3-
(N-ethyl-N-isopentylamino)-6-methyl-7-anilinofluorane, 3-(N-ethyl-N-furfurylamino)-6-methyl-7-
Anilinofluorane, 3-diethylamino-7-
(m-fluoroanilino)fluorane, 3,6-
Diethylaminofluoran-w-p-nitrophenylimidolactam, 3,6-diethylaminofluoran-w-p-chlorophenylimidolactam, bis(3,6-dimethylamino)-10-benzoylphenothiazine, 3 , 7-bis(dimethylamino)-10-acetylphenothiazine, 3,3
-Bis-dimethylaminophenyl-6-dimethylaminophthalide (crystal violet lactone), 3,3-bis-dimethylaminophenyl phthalide (malachite green lactone), 3,3
-bis(1-ethyl-2-methylindole-3
-yl)-phthalide, 3,3-bis(1-butyl-2-methylindol-3-yl)-phthalide,
Examples include 3,3-bis(1-octyl-2-methylindol-3-yl)phthalide. In addition, discoloration layers or discoloration layers that change color or fade due to the action of energy rays include diphenylmethane-based, triphenylmethane-based, thiazine-based, oxazine-based, xanthene-based, anthraquinone-based,
Compositions containing various pigments such as iminonaphthoquinone type and azomethine type, or compositions containing various pigments such as monoazo type, disazo type, triphenylmethane type, and metal complex salt type can be used. Furthermore, for the purpose of accelerating the rate of discoloration or discoloration, compositions in which the above-mentioned initiators are combined with these dyes or pigments can be used. Specific examples of the above pigments include crystal violet, bromophenol blue, bromocresol purple, tetrabromophenol blue, bromothymol blue, thymol blue, tripeolin, methyl yellow, methyl orange,
Examples include Methyl Red, Neutral Red, Cresol Red, Indigo Carmine, Bromophenol Red, Tropeolin, Alizarin Yellow R, Congo Red, Phenol Phthalein, Thymol Phthalein, and the like. Specific examples of pigments include Hansa Yellow 5G,
Benzine Yellow GR, Vulcan First Yellow G, Hansa Yellow 3R, Yellow HR, Permanent Orange GTR, Vulcan Orange R,
Chromophthal Orange 4R, Permanent Bold FGR, Brilliant First Scarlet,
Lakey Red D, Permanent Carmine FBB,
Examples include Rhodamine 3B Lake, Victoria Piure Blue Lake, Dianisidine Blue, Naphthol Green B, and the like. The active layer in the present invention is composed of a polymer binder having film-forming properties, such as a cellulose derivative such as ethyl cellulose, cellulose acetate, hydroxypropyl cellulose, nitrocellulose, cellulose acetate butyrate, cellulose acetate propionate, polychlorinated Vinyl, vinyl chloride copolymers such as vinyl chloride-vinyl acetate copolymer, vinyl chloride-vinyl acetate-vinyl alcohol copolymer, ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer,
Ethylene copolymers such as ethylene-vinyl chloride copolymer, polystyrene, styrene-butadiene-
Polystyrenes such as acrylonitrile copolymers, acrylic resins such as polyacrylic esters, polymethacrylic esters, and their copolymers, butyral resins, epoxy resins, alkyd resins, phenolic resins, saturated copolymerized polyester resins, fluorine Solvents (e.g. methanol , ethanol, isopropanol, benzene, toluene, xylene, ethyl acetate, isobutyl acetate, acetone, 2-butanone, 4-methyl-
Dispersed in 2-pentanone, cyclohexanone, tetrahydrofuran, dioxane, methylene chloride, chloroform, 1,2-dichloroethane, 1,1,1-trichloroethane, chlorobenzene, hexane, heptane, cyclohexane, dimethylacetamide, dimethylsulfoxide, etc.), It is prepared by coating a dissolved coating liquid on a support. There are no particular limitations on the quantitative proportions of each component in the active layer, but preferred examples are as follows. In the case of color forming layer, color former 10 parts Initiator 0.01 to 100 parts Polymer binder 1 to 1000 parts In the case of discoloration layer and fading layer Colorant or organic pigment 10 parts Initiator 0 to 100 parts Polymer binder 1 to 1000 parts Also active layer The thickness is 0.1 to 100 μm, preferably 0.5 to 50 μm. Furthermore, it is also possible to laminate two or more of the above-mentioned active layers, for example, a laminate of coloring layers with different coloring speeds, a laminate with color-changing layers or fading layers with different color-changing or fading speeds, a laminate of a color-forming layer and a color-changing layer, or A laminate with a fading layer is possible. Such a laminate can be provided by coating a second layer on a first layer on a support, with the first layer on one side of the support and the second layer on the other side. There are methods such as coating a first layer and a second layer on separate supports and gluing them together via an adhesive layer. Next, in the present invention, transparent or translucent sheet-shaped supports are used to coat the active layer, such as cellophane film, polyester film, cellulose triacetate film, polycarbonate film, nylon film, fluororesin film, polyethylene film, polypropylene film, polyarylate film,
TPX film etc. can be given. Furthermore, in the present invention, as shown in FIGS. 3 to 5, an energy ray absorbing support having a function of adjusting the energy rays emitted from the irradiation source and reaching the active layer can be used. Examples of such energy ray absorbing supports include polyester films and polycarbonate films containing energy ray absorbers or pigments, polyester films dyed with dyes, colored and transparent polyimide films, polyamideimide films, and polyphenylene films. Further, examples include polyester films in which metals such as aluminum, tin, and indium or metal oxides such as zinc oxide, titanium oxide, indium oxide, tin oxide, and bismuth oxide are vacuum-deposited or sputter-deposited. In the present invention, an energy ray absorption layer is provided on one side of the active layer and adjusts the energy rays emitted from the energy ray source and reaches the active layer, and an energy ray absorption layer is provided on the other side of the photoactive layer and is provided on the other side of the photoactive layer. As the energy ray absorbing layer that adjusts the energy rays emitted from sources other than the source, for example, external light and reaching the active layer, a layer containing a composition that has absorbency for the energy rays can be used. The energy rays that act on the active layer vary depending on the composition of the active layer, but an example is a wavelength of 450 nm.
The following are near ultraviolet and ultraviolet rays. A conventionally known ultraviolet absorbing layer can be used for a composition having absorbency in such a wavelength region. The ultraviolet absorbing layer includes compounds such as benzotriazole, benzophenone, salicylate, and cyanoacrylate, and more specifically, 2-(5-methyl-2-hydroxyphenyl)benzotriazole, 2-(3, 5-di-t-butyl-2-hydroxyphenyl)benzotriazole, 2-(3,
5-di-t-pentyl-2-hydroxyphenyl)benzotriazole, 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2,2'-dihydroxy-4,
4'-dimethoxybenzophenone, 2,2',4,
4'-tetrahydroxybenzophenone, 2-hydroxy-4-n-octoxybenzophenone, 4
-t-butylphenyl salicylate, 4-octylphenyl salicylate, ethyl-2-cyano-
Examples include 3,3-diphenyl acrylate and 2-ethylhexyl-2-cyano-3,3-dihydroxyacrylate. Furthermore, examples of substances having absorption properties in the above wavelength range include fine particles of inorganic substances such as zinc oxide, titanium oxide, tin oxide, bismuth oxide, tungsten oxide, barium titanate, and zinc sulfide. Furthermore, depending on the composition of the active layer, it can be made into a layer that exhibits activity against visible light of about 450 nm or more.
In such cases, various dyes, pigments, etc. that absorb the active light can be used. To provide an energy ray absorbing layer containing the energy ray absorbing substance described above, the above substance is combined with a film-forming polymeric binder such as cellulose such as ethyl cellulose, hydroxypropyl cellulose, nitrocellulose, cellulose acetate butyrate, and cellulose acetate propionate. Derivatives, polyvinyl chloride, vinyl chloride copolymers such as vinyl chloride-vinyl acetate copolymers, vinyl chloride-acrylic copolymers, ethylene-vinyl acetate copolymers, ethylene-vinyl alcohol copolymers, ethylene-chloride Ethylene copolymers such as vinyl copolymers, styrene copolymers such as polystyrene, styrene-butadiene copolymers, styrene-acrylonitrile copolymers, polyacrylic esters, polymethacrylic esters, and copolymers thereof Coating resins such as acrylic resins, epoxy resins, alkyd resins, phenolic resins, saturated copolymerized polyester resins, fluorine resins, polycarbonates, polyarylates, polysulfones, polyethersulfones, aromatic polyesters, polyphenylene ethers, etc. Solvents (e.g. methanol, ethanol, isopropanol, benzene,
Toluene, xylene, ethyl acetate, isobutyl acetate, acetone, 2-butanone, 4-methyl-2-
Pentanone, cyclohexane, tetrahydrofuran, dioxane, methylene chloride, chloroform,
A coating liquid obtained by dispersing and dissolving in 1,2-dichloroethane, 1,1,1-trichloroethane, chlorobenzene, hexane, heptane, cyclohexane, dimethylacetamide, dimethyl sulfoxide, etc.) is applied on the active layer and on the active layer. It can be coated on the side of the support that is not coated. Alternatively, the active layer may be coated on a support without an active layer, then the active layer may be coated on another support, and then the two may be bonded together via an adhesive layer or the like. Furthermore, the energy ray absorbing support described in the section of the support can be used for this layer, and in this case, the active layer and the absorbent support can be used together. In addition, the appropriate quantitative ratio of the absorbent material and the polymer binder in the energy ray absorbing layer is 1 part of the former to 0.1 to 1000 parts of the latter, and the thickness of the layer is 0.1 to 100 μm, preferably It is 0.5-50μm. The energy ray dose measurement sheet of the present invention obtained by the above procedure can be used to measure various energy ray sources, such as high pressure mercury lamps, ultra-high pressure mercury lamps, metal halide lamps, germicidal lamps, ion lamps, etc., and X-rays. It is possible to measure the irradiation dose of energy rays such as ultraviolet rays, X-rays, and electron beams emitted from an electron beam irradiation device or the like. It is also possible to measure the cumulative amount of sunlight irradiation or sunshine hours by attaching it to agricultural vinyl houses, outdoor buildings, office window glass, etc. Furthermore, it can be used for stationery, toys, etc., and for example, it is possible to visually measure the amount of ultraviolet rays in sunlight. The present invention will be explained in more detail by examples below.
The present invention is not limited thereby. Example 1 An active layer was formed on both sides of a polyester film having a thickness of 50 μm using an active layer coating solution prepared according to the following formulation (i) so that the thickness after drying was 15 μm. (i) 3-(N-ethyl-N-isopentylamino-6
-Methyl-7-anilinofluorane 10 parts Phenyltribromomethylsulfone 1 part 10% polystyrene toluene solution 100 parts Next, on top of the above active layer, apply the energy ray absorbing layer coating liquid of the following formulation (ii). An energy ray absorbing layer with a thickness of 50 μm was provided by the following process to obtain the energy ray dose measurement sheet of the present invention. The sheet to be measured was a transparent film layer with a slightly pale yellow color. (ii) 2-(3,5-di-t-butyl-2-hydroxyphenyl)benzotriazole 3 parts 10% toluene solution of polystyrene 100 parts Next, use a germicidal lamp with a lamp power of 30 W to sterilize the glass in the food sterilization case. This measurement sheet was attached to the inside of the wall so that the absorption layer with a thickness of 50 μm was placed on the glass wall side, and was irradiated with energy rays with a wavelength of 253.7 nm emitted from a germicidal lamp. The energy ray intensity at the measurement sheet position was 10 mW/cm ³ . This measurement sheet gradually begins to develop a black color when the germicidal lamp starts to turn on, and the color density increases in proportion to the increase in the irradiation amount, and the color density becomes saturated at an irradiation amount of 10 ⁶ mJ/cm2 or ^more . It became constant. 50μm thickness for comparison
In the measurement sheet without the absorption layer, color development progressed due to the action of indoor light even under conditions where the germicidal lamp was not turned on. Example 2 The following formulation was placed on a polyimide film with a thickness of 38 μm
The active layer coating solution prepared in (iii) was applied to provide an active layer having a dry thickness of 10 μm. (iii) Bis(3,6-dimethylamino)-10-benzoylphenothiazine 10g Triphenylsulfonium hexafluorophosphate 2g 10% polyarylate solution in methylene chloride 100g Next, a 38 μm polyimide film was attached via an adhesive layer. The energy dose measurement sheet of the present invention was obtained by pasting onto the above active layer. The measurement sheet was a transparent film layer colored bright yellow. This measurement sheet was attached to the glass wall of a food sterilization case in the same manner as in Example 1, and a lighting test using a sterilization lamp was conducted. This display sheet developed a blue color when the germicidal lamp was turned on, and the color density increased in proportion to the irradiation amount. At an irradiation dose of 10 ⁸ mJ/cm ² or more, the color density became constant. Example 3 An active layer coating solution prepared according to the following formulation (iv) was applied to both sides of a 100 μm thick polyester film to provide an active layer having a coating thickness of 15 μm after drying. (iv) 10 parts of 3,3-bis(1-octyl-2-methylindol-3-yl)phthalide 1.5 parts of hexabromodimethylsulfone 100 parts of a 10% dichloroethane solution of polycarbonate (v) ) was applied to form an active layer with a thickness of 20 μm, thereby obtaining an energy dose measurement sheet of the present invention. The measurement sheet was a transparent film layer colored pale yellow. (v) 2,2',4,4'-tetrahydroxybenzophenone 10% 2-butane solution of partially saturated copolyester
100 copies Next, this measurement sheet was attached to the line of an electron beam irradiation device, and the color development characteristics were evaluated by changing the irradiation amount. As a result, the measurement sheet was colored red by electron beam irradiation, and the color density increased in proportion to the irradiation dose. At irradiation doses of 20 megarads or more, the color density became saturated and became constant. Example 4 An energy dose measurement sheet of the present invention was obtained by following the same procedure as in Example 1 except that an active layer coating liquid prepared with the following formulation (vi) was used instead of formulation (i) in Example 1. . This measurement sheet had a bright orange colored film layer. (vi) 10 parts of Vulcan Orange R 200 parts of a 10% solution of saturated copolymerized polyester in a mixed solvent of toluene/2-butanone (mixing ratio 7/3) Next, a lighting test of the measurement sheet of the present invention was carried out using the same procedure as in Example 1. I went. As a result, the color of the measurement sheet of the present invention progressed as the sheet was turned on, and became colorless and transparent at an irradiation dose of 10 ⁴ mJ/cm ² or more. Example 5 The active layer coating liquid of formulation (i) and the coating liquid of formulation (ii) of Example 1 were applied to both sides of a polyester film with a thickness of 38 μm to form an active layer and an absorbent layer each having a film thickness of 15 μm. Established. Next, the active layer coating liquid of formulation (vi) of Example 4 and the absorption layer coating liquid of formulation (v) of Example 3 were applied to both sides of another polyester film having a thickness of 38μ,
Both active layers were adhered to each other to obtain a dose measurement sheet of the present invention having a laminated structure. The measurement sheet was a transparent film colored pale yellow. The measurement sheet of the present invention was attached in the same manner as in Example 1 so that the absorbing layer was located on the inner wall side of the glass, and a lighting test using a germicidal lamp was conducted. As a result, in the measurement sheet of the present invention, the active layer first begins to discolor when the light is turned on, and the discoloration progresses in proportion to the increase in the lighting time, becoming slightly bluish at an irradiation dose of approximately 10 ⁵ mJ/cm ² . It became a transparent layer. As the lighting continued, the active layer developed a blue color in proportion to the increase in lighting time, and the color density became constant at an irradiation dose of 10 ⁷ mJ/cm ² or more. Example 6 An active layer coating liquid of the following formulation (vii) and an absorption layer coating liquid of formulation (viii) were sequentially applied onto a 50 μm thick ultraviolet absorbing polyester film (manufactured by Toyobo Co., Ltd.) to form a film. An energy ray dosimetry sheet of the present invention consisting of an active layer and an absorbing layer with a thickness of 10 μm and 15 μm was obtained. (vii) Bis(4-diethylamino-2-methylphenyl)phenylmethane 10g Phenyltribromomethylsulfone 1g 10% polyarylate solution in methylene chloride 150g (viii) 2-Hydroxy-4-methoxybenzophenone
2g 10% toluene solution of polystyrene 100g Next, the measuring sheet of the present invention was attached to the outside of an agricultural vinyl greenhouse. At this time, the 15 μm absorbing layer was directed toward the atmosphere. The sheet of the present invention began to develop a green color upon irradiation with sunlight, and the color density increased in proportion to the increase in sunlight time, and the color density became saturated and became constant after about 240 hours of sunlight or more. Example 7 In the active layer of Example 6, the coating liquid of formulation (iii) was used instead of the coating liquid of formulation (vii), and in the absorption layer, the coating liquid of formulation (iii) was used.
An energy ray dosimetry sheet of the present invention was prepared in the same manner as in Example 6, except that a 38 μm thick polyimide film was used in place of the coating solution (viii), and an irradiation test using outdoor sunlight was conducted. As a result, the measurement sheet of the present invention develops a blue color when exposed to sunlight, and the color density increases in proportion to the increase in sunlight time, and the color density becomes saturated and becomes constant after about 2000 hours of sunlight or more. Summer. Examples 8 to 12 In formulation (i) in Example 1, 3-(N-
The energy ray dose measurement sheet of the present invention was prepared using the same procedure as in Example 1 except that the compounds shown in Table 1 were used in place of ethyl-N-isopentylamino)-6-methyl-7-anilinofluorane. Created,
A germicidal lamp lighting test was conducted. The results are shown in Table 1.

[Table] <Effects of the Invention> Since the present invention has the above configuration, when measuring the dose while the energy ray irradiation source is in operation, it is no longer necessary for the irradiation source and the observer to be in the same position. Even on work lines that use energy irradiation sources such as X-rays and X-rays, it has become possible to measure the cumulative irradiation amount over time on the line.

[Brief explanation of drawings]

1 to 5 are diagrams showing the layer structure of the energy ray dose measurement sheet of the present invention. 1,1'...Active layer, 2,3...Energy ray absorbing layer, 4...Support, 5...Energy ray absorbing support.

Claims (1)

[Scope of Claims] 1. An active layer consisting of at least one of a color-forming layer, a color-changing layer, or a fading layer that causes a color change by the action of energy rays is provided on at least one side of the support, and both A sheet having an energy absorbing layer as the outermost layer, wherein the coloring layer contains at least one initiator selected from an organic halogen low molecular compound or an aromatic onium salt. Measurement sheet. 2. On at least one side of the energy ray absorbing support, an active layer and an energy ray absorbing layer consisting of at least one of a coloring layer, a color changing layer, or a fading layer that causes a color change due to the action of energy rays are provided. 1. A sheet for measuring energy ray dose, which is a sequentially laminated sheet, wherein the coloring layer contains at least one initiator selected from an organic halogen low-molecular compound or an aromatic onium salt.