JP6708034B2 - Degradation state determination method and degradation state determination indicator - Google Patents

Description

The present invention relates to a deterioration state determination method and a deterioration state determination indicator, and more specifically, a deterioration state of an object to be determined based on a color change caused by fading due to aging of a colorant color-coded on the object. The present invention relates to a deterioration state determination method and a deterioration state determination indicator for determining a deterioration state.

For example, an overhead power distribution line used outdoors is exposed to direct sunlight, wind and rain, etc., so that deterioration progresses with the start of installation. For this reason, an overhead wire, which is installed in a corrosive environment such as outdoors, for example, an overhead distribution line, is required to have long-term reliability so that a stable supply of electric power can be performed over a long period of time. In order to ensure reliability, maintenance work such as regular inspection and replacement work is indispensable, but in order to determine the timing and scale of the maintenance, such as corrosion of the electric wire itself to be maintained It is necessary to accurately grasp the deterioration situation. However, overhead distribution lines are extended over high places such as steel towers, and they extend over long distances. Therefore, since the corrosion and deterioration state varies depending on the environment in which the line is connected, it is difficult to accurately grasp the corrosion and deterioration state for each distribution line.

For example, Patent Documents 1 and 2 disclose the deterioration status of the distribution line. Patent Document 1 discloses a method for diagnosing corrosion life of transmission lines, a method for diagnosing corrosion life, and a method for producing the same, in which a fluorescent layer containing a fluorescent material is formed on the surface of an aluminum wire and the surface of the fluorescent layer is a light-shielding coating layer. To form a corrosion life diagnosis line, and incorporate this corrosion life diagnosis line as part or all of the transmission line consisting of multiple conductive lines (or wrap it around the transmission line), and then perform the corrosion life diagnosis When the coating layer of the wire corrodes due to external influences and the fluorescent layer is exposed on the surface, the light emission state of the exposed part is visually observed directly or indirectly to check the corrosion status of the corrosion life diagnosis line. It is to diagnose and predict the life of the transmission line.

Further, in the electric wire having the sulfurization contamination detection function disclosed in Patent Document 2, an insulator covering the surface of the conductor is formed in two layers, an inner layer and an outer layer, and the inner layer is colored in colors other than white and black. It is a blackening detection part that turns black due to the reaction with sulfide, and the outer layer is a transparent see-through part that can observe the blackened contamination state of the inner layer, and the life of the wire is judged by the visual observation of the observer. Is.

On the other hand, various techniques for determining deterioration of an object based on irradiation of ultraviolet rays have been proposed (see, for example, Patent Documents 3 to 6). First, the period display member shown in Patent Documents 3 and 4 is designed as a product that pairs with the wiper rubber, and a specific ink color or paint layer that fades by ultraviolet rays is provided on the mount so that the irradiation of ultraviolet rays increases. When the wiper rubber is replaced, it becomes transparent and the pattern mark on the mount appears on the reflective film so that the car owner can be notified when the wiper rubber should be replaced.

In addition, the deterioration determination method disclosed in Patent Document 5 is such that the hue changes on the surface (or the material that wraps it) of a fibrous or non-woven fabric made of polyethylene fiber, aramid fiber, polyalate fiber, etc. with the progress of cumulative exposure of ultraviolet rays or the like The substance is applied, and the decrease in strength of the fiber or non-woven fabric is determined by comparing the hue change and the hue of the deterioration determination storage material.

Furthermore, the solar light receiving amount measuring agent and the simple solar light receiving measuring device shown in Patent Document 6 are those having a deep red pigment among carotenoids, for example, β-carotene, lutein, lycopene, capsanthin, fucoxanthin, cryptoxanthin. , Canthaxanthin, zeaxanthin, astaxanthin, etc. as an active ingredient, which is adsorbed/coated on a solid support or dissolved in a solvent capable of distilling off a solvent (for example, ethanol, methanol) or a fatty acid or a glycerin ester thereof. A solar light receiving amount measuring agent, which is adsorbed and applied to a solid support such as paper, filter paper, filter, and fiber to constitute a simple solar light receiving measuring device.

JP, 2001-155563, A JP 2000-340041 A JP, 2001-51603, A JP, 2001-154585, A JP, 2006-300912, A JP, 2014-52323, A

However, the above-described method for diagnosing corrosion life of a transmission line, the method for diagnosing corrosion life of a transmission line, and the method for producing the same in Patent Document 1 described above are for diagnosing corrosion of an electric wire by means of light emission thereof, and therefore are difficult to find in a bright daytime, and at night. There is a problem that it becomes a diagnostic work of. In addition, the electric wire having the sulfide pollution detecting function of Patent Document 2 can detect only sulfide pollution, and is mainly applied to electric wires used in petrochemical plants and automobiles, and overhead distribution lines and the like are not applicable. Further, in the period display members of Patent Documents 3 and 4, when an attempt is made to apply a specific ink color or a paint layer to an electric wire, a layer different in color from the color of the insulating layer may be separately provided on the insulating layer or a reflective film may be provided. The deterioration determination period is about one year, which is short. Furthermore, the deterioration determination method of Patent Document 5 is to apply a substance whose hue changes to fibers, but it is not only exposed to light like an overhead distribution line, but also exposed to light under an environment where it is exposed to wind and rain for a long time. There is a problem in that the change in hue alone may not necessarily match the change in the actual environment, and the deterioration state cannot be determined unless it is compared with the hue of the deterioration determination storage material. Further, the sunlight receiving amount measuring agent and the simple sunlight receiving measuring device shown in Patent Document 6 have a fast fading saturation of about 8 hours, and are intended to be used for determination of deterioration in a long period such as 5 years or several decades. There is a problem that it is not suitable for.

Therefore, the present invention has been made in view of the above problems, and a deterioration state determination method and a deterioration state determination method capable of easily determining long-term deterioration of an object based on a change in color caused by an age change of a colorant, and An object is to provide a deterioration state determination indicator.

In addition, the present invention is a deterioration state determination method and deterioration state that allows the color change over a long period of time by using an organic pigment as a colorant as a detection medium, and easily determine aged deterioration over a long period of time. It is intended to provide a decision indicator.

In order to achieve the above-mentioned object, the invention according to claim 1 is the deterioration of the object based on the state of the color change caused by the aging of the colorant that is colored in the object that is the object whose deterioration state is to be determined. In the deterioration state determination method for determining the state, by performing a colorant deterioration test considering the environmental conditions in which the object is actually arranged for the colorant, the color of the colorant under the colorant deterioration test environment is determined. Grasping the fading state to grasp the correlation in advance with respect to how long the color state of the colorant in the process of change corresponds to the color state in the actual secular change And a colorant selection step of selecting a colorant whose color change continues during the period until the object deteriorates based on the correlation between the color change and the period grasped by the fading state grasping step, , The correlation grasped in the fading state grasping step from the actual color state of the colorant which has changed with the passage of a predetermined period for the object to which the colorant selected by the colorant selecting step has been arranged And a deterioration state determination step of determining a deterioration state of the object from the estimated aged period.

In order to achieve the above-mentioned object, the invention according to claim 2 is the deterioration of the object based on the state of the color change caused by the aging of the colorant that is colored in the object that is the object of which the deterioration state is to be determined. In the deterioration state determination method of determining the state, the color of the colorant under the colorant deterioration test environment by performing a colorant deterioration test in consideration of the environmental conditions in which the object is actually arranged for the colorant. Grasping the fading state to grasp the correlation in advance as to how long the color state of the colorant in the process of change corresponds to the color state in the actual secular change The step and the object at each stage in the process of the deterioration of the object under the object deterioration test environment by performing the object deterioration test in consideration of the environmental conditions in which the object is actually arranged. Deterioration state grasping step of grasping a correlation in advance regarding the deterioration state of the object when the deterioration state of the object corresponds to the deterioration state when the object has passed in actual aging, and the deterioration state grasping step Estimating the period until the object deteriorates based on the correlation between the deterioration state and the period of the grasped object, and the correlation between the color change and the period grasped by the fading state grasping step. Based on the colorant selection step of selecting a colorant whose color change continues until the object deteriorates based on the colorant selected by the colorant selection step. An aged period estimation step for estimating an aged period based on the correlation grasped in the fading state grasping step from the actual color state of the colorant changed with the passage of time, and an estimation by the aged period estimation step A deterioration state determination step of determining how much the actual deterioration state of the object is based on the correlation determined by the deterioration state determination step from the aged period. Characterize.

In order to achieve the above object, the invention according to claim 3 is the deterioration state determination method according to claim 1 or 2, wherein two or more similar colors having different color change states under the colorant deterioration test environment are used. By adjusting the mixing ratio of the colorant, the period during which the color change state of the colorant is maintained is adjusted according to the aged period until the object deteriorates.

In order to achieve the above object, the invention according to claim 4 is the deterioration state determining method according to any one of claims 1 to 3, wherein the colorant is an organic pigment and/or an inorganic pigment. Characterize.

In order to achieve the above-mentioned object, the invention according to claim 5 is the deterioration state determining method according to any one of claims 1 to 4, wherein the colorant is isoindolinone yellow which is a yellow organic pigment, Any one or more of disazo yellow, condensed azo yellow, and anthraquinone yellow, and any one or more of red organic pigments, diketopyrrolopyrrole, perylene red, condensed azo red, anthraquinone red, and a blue organic pigment. It is characterized by being mixed with phthalocyanine blue.

In order to achieve the above object, the invention according to claim 6 is the method for determining a deterioration state according to claim 5, further comprising carbon black which is a black inorganic pigment and/or titanium oxide which is a white inorganic pigment. It is characterized by being

In order to achieve the above object, the invention according to claim 7 is the deterioration state determining method according to any one of claims 1 to 6, wherein the object is a covering material for an overhead wire. ..

In order to achieve the above object, the invention according to claim 8 is the deterioration determining method according to claim 7, wherein the overhead wire is a distribution line, and the coloring agent is linearly applied to a covering material of the distribution line with a predetermined width. It is characterized in that it is color-shaped or non-linearly colored, or is color-coded on the fins provided on the distribution line.

In order to achieve the above-mentioned object, the invention according to claim 9 is based on the state of the color change caused by the aging of the coloring agent arranged on the surface of the target object whose deterioration state is to be determined. In the deterioration state determination indicator for determining the deterioration state, the indicator is a color state at each stage in the process of color change by performing a colorant deterioration test in consideration of an environmental condition in which the object is actually arranged. Is composed of a colorant that has a correlation in advance about the color change and the period of time corresponding to the state of the color in the actual aging, and the predetermined color is applied to the object. The state of deterioration of the object is determined from the estimated aging period by estimating the aging period based on the correlation between the color change and the period from the actual color state of the colorant after the lapse of the period. It is characterized by doing.

In order to achieve the above-mentioned object, the invention according to claim 10 is the deterioration of the object based on the state of the color change caused by the secular change of the colorant that is colored in the object that is the object for which the deterioration state is to be determined. In the deterioration state determination indicator for determining the state, the indicator indicates the actual color state of each stage in the process of color change by performing a colorant deterioration test in consideration of the environmental conditions in which the object is actually placed. Of the color change and the period of time corresponding to the state of the color when the color change and the period is made up of a colorant having a correlation previously grasped, the colorant, the object is actually Deterioration of how much the state of deterioration in each stage of the deterioration process is equivalent to the deterioration state after actual aging by performing the deterioration test of the object considering the placed environmental conditions By coloring the object whose correlation is grasped in advance for the state and the period, the color change and the period from the actual color state of the colorant that has been color-coded on the object and the predetermined period has elapsed The aging period is estimated based on the correlation, and the deterioration state of the object is determined based on the correlation between the deterioration state and the period from the estimated aging period.

In order to achieve the above object, the invention according to claim 11 is the deterioration state determination indicator according to claim 9 or 10, wherein two or more similar colors having different color change states under the colorant deterioration test environment are used. By adjusting the blending ratio of the colorant, the period during which the color change state of the colorant is maintained is adjusted according to the aged period until the object deteriorates.

In order to achieve the above object, the invention according to claim 12 is the deterioration determination indicator according to any one of claims 9 to 11, characterized in that the colorant is an organic pigment and/or an inorganic pigment. And

In order to achieve the above-mentioned object, the invention according to claim 13 is the deterioration state determination indicator according to any one of claims 9 to 12, wherein the colorant is isoindolinone yellow which is a yellow organic pigment, Any one or more of disazo yellow, condensed azo yellow, anthraquinone yellow, and any one or more of red organic pigments diketopyrrolopyrrole, perylene red, condensed azo red, anthraquinone red, and a blue organic pigment It is characterized by being mixed with phthalocyanine blue.

In order to achieve the above object, the invention according to claim 14 is the deterioration state determination indicator according to claim 13, further comprising carbon black which is a black inorganic pigment and/or titanium oxide which is a white inorganic pigment. It is characterized by being a mixture.

In order to achieve the above object, the invention according to claim 15 is the deterioration state determination indicator according to any one of claims 9 to 14, wherein the object is a covering material for an overhead wire.

In order to achieve the above-mentioned object, the invention according to claim 16 is the deterioration determination indicator according to claim 15, wherein the overhead wire is a distribution line, and the coloring agent is linear in a predetermined width on a covering material of the distribution line. Alternatively, the color is arranged in a non-linear manner, or the fins provided on the distribution line are colored.

According to the deterioration state determination method and the deterioration state determination indicator according to the present invention, the colorant deterioration test is performed in consideration of the environmental conditions in which the object is actually arranged, and the correlation between the color change and the period is grasped in advance. By providing a colorant on the object, it is possible to easily and reliably determine the state of deterioration of the object based on the actual degree of discoloration.

Further, according to the deterioration state determination method and the deterioration state determination indicator of the present invention, there is an effect that it is possible to easily determine the deterioration state of an object, such as a distribution line, for a long period of time that exceeds at least 5 years.

It is a flowchart of 1st embodiment of the deterioration state determination method which concerns on this invention. It is a flowchart of 2nd embodiment of the deterioration state determination method which concerns on this invention. The 1st embodiment which applied the deterioration state judgment indicator concerning the present invention to an overhead distribution line is shown, (a) is a side view and (b) is a sectional view of the AA line of (a). The 2nd embodiment which applied the deterioration state judgment indicator concerning the present invention to an overhead distribution line is shown, (a) is a side view and (b) is a sectional view of a BB line of (a).

[Degradation status determination method]
A deterioration state determination method and a deterioration state determination indicator according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a flow chart of a first embodiment of a deterioration state determination method according to the present invention, and FIG. 2 is a flow chart of a second embodiment of a deterioration state determination method according to the present invention.

[First embodiment]
First, factors that cause deterioration of things include, for example, sunlight (ultraviolet light, visible light), weather (rain, snow), temperature, humidity, water, pollutants (sulfides, molds, etc.), external factors ( There are various things such as wear). Deterioration factors leading to deterioration phenomena are often complex, and it is necessary to understand the degree of involvement of each factor as much as possible. In other words, it is necessary to understand under what environmental conditions the object is placed. For example, in the case of overhead distribution lines, the environment in which they are laid is, for example, an environment that is exposed to sunlight in coastal areas, or an environment in which there is a large difference in temperature and temperature, although there is little influence of sunlight in mountainous areas. Moreover, the progress of deterioration also differs depending on whether or not the environment is greatly affected by wind and rain.

Therefore, it is necessary to perform a colorant deterioration test on the colorant used as the deterioration state determination indicator in consideration of the environmental conditions under which the target object whose deterioration state should be determined is actually placed. In this case, the condition (mode) of the colorant deterioration test is set after grasping the characteristics of the material forming the object. If this condition is not appropriate, the color state at each stage in the process of color change due to the colorant deterioration test is equivalent to the color state after the actual aging. The correlation that is obtained about the change and the period does not match the actual state of the color change, which may cause a trouble in actual use. Modes include temperature, humidity, light irradiation amount, dew condensation state, and shower watering. The colorant deterioration test may be a so-called accelerated deterioration test as well as an exposure test performed in a relevant natural environment.

Then, under the conditions of the above-described colorant deterioration test, the color state of the colorant in each step in the course of the colorant color change in the course of the colorant color change in the actual aging Correlation is grasped in advance as to whether the state corresponds to the state (fading state grasping step (step S1)). As the colorant deterioration test, for example, a metal halide lamp acceleration tester, a UV lamp acceleration tester, a xenon arc weather meter, a carbon arc weather meter, a solar light condensation accelerated exposure device, an outdoor exposure accelerated test device, etc. is there. A colorant deterioration test is performed by using these devices and apparatuses, and the correlation of whether the color change state of the colorant corresponds to the actual state of aging is grasped in advance.

Then, based on the correlation between the color change of the colorant grasped in the color fading state grasping step (S1) and the period, a colorant whose color change continues until the object deteriorates is selected ( Colorant selection step (step S2)). If the color change of the selected colorant is completed before the period of deterioration of the target object, or if the period of time before the deterioration of the target object passes, discoloration cannot be confirmed. In such a case, it does not have a function as an indicator for the target object, and therefore it is necessary to link the deterioration of the target object and the change in the color of the colorant to be expressed. In this embodiment, as the period until the target deteriorates, a specific deterioration period can be specified from the target actually deteriorated after a predetermined period has elapsed.

Here, examples of the colorant include organic pigments and inorganic pigments, examples of yellow organic pigments include isoindolinone yellow, disazo yellow, condensed azo yellow, anthraquinone yellow, and the like. , Diketopyrrolopyrrole, perylene red, condensed azo red, anthraquinone red, and the like, and blue organic pigments include phthalocyanine blue and the like. The period of color change can be appropriately adjusted by mixing these organic pigments alone or in combination. Then, for example, among pigments of similar colors such as yellow and red, by appropriately adjusting the blending ratio of two or more pigments of similar colors having different light resistance, the period in which the state of color change is maintained is adjusted. It can be adjusted according to the age of deterioration of the object. By using these organic pigments, adjustment can be performed for at least 5 to 10 years.

Carbon black is used as the black inorganic pigment, and titanium oxide is used as the white inorganic pigment. The color condition can be adjusted by further mixing these organic pigments with the above-mentioned organic pigments as a color mixture. And these colorants are used as indicators.

Next, the colorant selected in the colorant selection step (S2) is color-coded on the object, and the color of the actual colorant is changed by arranging the object in an actual environment and elapse of a predetermined period. From the state, the aged period is estimated based on the correlation obtained in the faded state grasping step (S1) (age period estimating step (S3)). For the color arrangement, a selected colorant can be applied to the surface of the target object. For example, in the case of a distribution line, it is kneaded with PVC as a raw material of the covering material and extruded, or a straight line with a predetermined width. It can be colored in a spiral or spiral shape, or on a fin provided on a distribution line.

Then, based on the color change of the colorant, the deterioration state of the object is determined from the aged period estimated in the aged period estimation step (S3) (deterioration state determination step (step S4). Deterioration status can be specified based on the deterioration status of the object collected from the actual site due to deterioration, that is, the deterioration status of the object over the actual aging period can be grasped in advance and the aging period can be estimated. In step (S3), the deterioration state of the object is determined by specifying the actual deterioration state of the object corresponding to the period estimated by the change in the color of the colorant. You can

[Second embodiment]
In the first embodiment, the colorant deterioration test is performed on the colorant, and the state of color change due to aging is grasped.However, in the present embodiment, the object is actually arranged for the object. By performing an object deterioration test in consideration of the environmental conditions, the deterioration state at each stage in the deterioration process corresponds to the deterioration state after the actual aging change. And the period, the state of deterioration of the object is determined in advance based on the correlation. This method can be used, for example, when the object is a new product and the actual state of aging is unknown. Note that description of steps similar to those of the first embodiment will be omitted as appropriate.

A colorant deterioration test is performed on the colorant (a discoloration state grasping step (step S11), and similarly to the colorant deterioration test, an object deterioration test is also performed on the object, and the object is subjected to the object deterioration test environment. A correlation is grasped in advance about how long the deterioration state of the object at each stage in the process of deterioration of the object corresponds to the deterioration state of the object in the actual aging (deterioration state Grasping step S12) As the target deterioration test, there is, for example, a test using a metal halide lamp acceleration tester as in the case of the colorant deterioration test.

Then, a period until deterioration of the object is estimated based on the correlation between the deterioration state of the target object and the period acquired in the deterioration state acquiring step (S12), and is grasped in the fading state acquiring step (S11). On the basis of the correlation between the color change and the period, a colorant whose color change continues until the object deteriorates is selected (colorant selection step (step S13). Colorant selection in the present embodiment. In step (S13), not only the colorant but also the period until the deterioration of the target is subjected to the target deterioration test to grasp the correlation in advance between the state of deterioration and the period.

Next, regarding the object to which the colorant selected in the colorant selection step (S13) is colored, the correlation obtained in the fading state grasping step from the actual color state of the colorant changed over a predetermined period. The aging period is estimated on the basis of the aging period estimation step (step S14). The degree of actual deterioration of the object is determined (deterioration state determination step (step S15). The deterioration state determination procedure is different in that the deterioration period of the object is grasped by the object deterioration test. The detailed description is omitted because it is almost the same as the first embodiment except for the case where the target deterioration test is performed by coloring the target with a colorant serving as an indicator and separately from the colorant. Any of the cases may be used only for the case.

"Structure of deterioration state judgment indicator"
A vinyl chloride resin having a molecular weight of 1100 was kneaded with a phthalate plasticizer and a barium zinc stabilizer at a weight ratio of 100:20:1 to obtain vinyl chloride resin pellets (hereinafter referred to as "PVC pellets"). .. The obtained PVC pellets were kneaded with the following organic pigments and inorganic pigments in the following weight ratios to color the PVC pellets.
(1) A yellow organic pigment isoindolinone yellow was kneaded in a PVC organic pellet at a weight ratio of 100:20 to obtain a yellow pellet (hereinafter referred to as "Y-1MB").
(2) Yellow organic pigment disazo yellow was kneaded with the PVC pellets at a weight ratio of 100:20 to obtain yellow pellets (hereinafter referred to as "Y-2MB").
(3) The red organic pigment diketopyrrolopyrrole was kneaded with the PVC pellets at a weight ratio of 100:20 to obtain red pellets (hereinafter referred to as "M-1MB").
(4) The red organic pigment perylene red was kneaded with the PVC pellets at a weight ratio of 100:20 to obtain red pellets (hereinafter referred to as "M-2MB").
(5) The blue organic pigment phthalocyanine blue was kneaded with the PVC pellets at a weight ratio of 100:20 to obtain blue pellets (hereinafter referred to as “C-1MB”).
(6) The black inorganic pigment carbon black was kneaded with the PVC pellets at a weight ratio of 100:20 to obtain black pellets (hereinafter referred to as "K-1MB").
(7) White inorganic pigment titanium oxide was kneaded with the PVC pellets at a weight ratio of 100:20 to obtain white pellets (hereinafter referred to as "W-1MB").

Next, Y-2MB, M-1MB, and C-1MB were kneaded at a ratio of 1:1:0.5 to obtain mixed color pellets MX1-MB. Then, PVC pellets and MX1-MB were kneaded at a weight ratio of 100:0.1, 100:0.2, 100:1.0, respectively, and a colored vinyl chloride sheet having a thickness of 1 mm was obtained by a calender rolling roll. It was Each of the obtained colored vinyl chloride sheets was subjected to an irradiation test for 312 hours in the following test mode using a metal halide-based accelerated weathering tester (Metal weather manufactured by Dipla Wintes).
L (Light) 20h BP53°C 50%RH
D (condensation) 4h BP30°C 95%RH
Start shower 30 seconds Yes Rest (pause) 0.01h Shower 30 seconds Yes Output 70 mW/cm ²
Filter KF-1
Then, each of the obtained test samples was measured with a color difference meter (CR-200 manufactured by Konica Minolta, the same applies hereinafter), and the results shown in Table 1 were obtained.

According to visual observation, the blank is white to brown, 100:0.1 is light gray to dark brown, 100:0.2 is dark gray to light brown, and 100:1.0 is black. The color changed to light green. This test time of 312 hours corresponds to a period of about 4 years by comparison with the exposure test.

Similarly, Y-2MB, M-1MB, and C-1MB were kneaded at a weight ratio of 1:1:0.2 to obtain mixed color pellets (MX2-MB). Then, PVC pellets and MX2-MB) were kneaded at a ratio of 100:0.1, 100:0.2, 100:1.0, and a 1 mm thick colored vinyl chloride sheet was obtained with a calender rolling roll. .. Each of the obtained colored vinyl chloride sheets was subjected to an irradiation test for 312 hours in the same test mode as in Example 1 using a metal halide-based accelerated weathering tester (Metal Weather manufactured by Dipla Wintes). Then, each of the obtained test samples was measured with a color difference meter, and the results shown in Table 2 were obtained.

Visual observation revealed that 100:0.1 changed from light gray to dark brown, 100:0.2 changed from dark gray to light brown, and 100:1.0 changed from black to light green. .. This test time of 312 hours corresponds to a period of about 4 years by comparison with the exposure test.

Since the yellow organic pigment Y-2MB is inferior in fading property to the same Y-1MB, the period to function as an indicator is further extended by adding Y-1MB as a yellow organic pigment and adjusting the compounding ratio appropriately. It is presumed that this can be extended to Further, since the red organic pigment M-2MB is inferior in fading property to the same M-1MB, the period during which it functions as an indicator by adding M-2MB as a red organic pigment and adjusting the compounding ratio appropriately. It is speculated that it can be adjusted short. Further, by adding black inorganic pigment K-1MB or white inorganic pigment W-1MB as an additional color to Y-1MB, Y-2MB, M-1MB, and C-1MB, the overall color can be adjusted. it can.

PVC pellets and Y-1MB, Y-2MB, M-1MB, C-1MB were kneaded at a ratio of 500:1:1:2:1, and a 1 mm-thick colored vinyl chloride sheet was obtained with a calender rolling roll. It was Next, the colored vinyl chloride sheet was subjected to an irradiation test for 312 hours and 504 hours in the test mode shown in Example 1 using a metal halide-based accelerated weathering tester (Metal weather manufactured by Dipla Wintes). Then, the obtained test sample was measured with a color difference meter, and the results shown in Table 3 were obtained.

Initially, it was dark brown at first but turned brown at 312 hours and whitish at 504 hours. This test time of 504 hours corresponds to a period of about 7 to about 9 years by comparison with the exposure test.

PVC pellets and Y-1MB, Y-2MB, M-1MB, C-1MB were kneaded at a ratio of 450:1:0.5:1.5:1.5 and colored with a calendering roll to a thickness of 1 mm. I got a vinyl chloride sheet. Then, the colored vinyl chloride sheet was subjected to the same accelerated weather resistance test as in Example 3. Then, the obtained test sample was measured with a color difference meter, and the results shown in Table 4 were obtained.

At first, it was visually dark brown and dark brown, but at 312 hours, it turned a little bluish brown, and at 504 hours, it turned whitish. This test time of 504 hours corresponds to a period of about 7 to about 9 years by comparison with the exposure test.

PVC pellets and Y-1MB, M-1MB, and C-1MB were kneaded at a ratio of 500:2:2:1, and a 1 mm thick colored vinyl chloride sheet was obtained with a calender rolling roll. Then, the colored vinyl chloride sheet was subjected to the same accelerated weather resistance test as in Example 3. Then, the obtained test sample was measured with a color difference meter, and the results shown in Table 5 were obtained.

At first, what was visually dark brown was discolored to whitish brown at 312 hours and further whitish at 504 hours. This test time of 504 hours corresponds to a period of about 7 to about 9 years by comparison with the exposure test.

PVC pellets and Y-1MB, Y-2MB, M-1MB, C-1MB, K-1MB were kneaded at a ratio of 501:1:1:2:1:0.01 and calendered to a thickness of 1 mm. A colored vinyl chloride sheet was obtained. Next, the same accelerated weather resistance test as in Example 3 was performed. Then, the obtained test sample was measured with a color difference meter, and the results shown in Table 6 were obtained.

Initially, it was a dark brown color, but it turned brown at 312 hours and slightly whitish at 504 hours. This test time of 504 hours corresponds to a period of about 7 to about 9 years by comparison with the exposure test. The degree of discoloration was smaller than that in Example 3.

In Examples 3, 4 and 5, since isoindolinone (Y-1MB), which has high weather resistance, was added, the degree of visual discoloration was small as compared with Examples 1 and 2 in which it was not added. There is. Moreover, in Example 6, since a small amount of carbon black (K-1MB) was added, the irradiation time and the degree of color change corresponded to each other, and compared to Examples 3 and 4, there was less whitishness and the degree of discoloration. Is getting better. The addition of carbon black tended to make the initial color darker and reduce the degree of discoloration.

[Degradation state determination method and overhead state determination indicator of overhead line]
Next, an embodiment in which the deterioration state determination method and the deterioration state determination indicator according to the present invention are applied to an overhead line will be described with reference to the drawings. Here, the "overhead line" in the present embodiment is a concept including not only electric wires such as a distribution line and a power transmission line but also wiring installed outdoors such as an optical fiber cable. FIG. 3 shows a first embodiment in which the deterioration state determination indicator 1 according to the present invention is applied to an overhead distribution line, which is one of overhead lines. (a) is a side view and (b) is A in (a). It is a sectional view taken along the line A. First, the configuration of the overhead distribution line 10 will be described. The illustrated overhead distribution line 10 is, as a general rule, a so-called finned wire having a snow-draining function, and a plurality of (seven in the present embodiment) conductors 11 and 11 made of a single wire and the conductors 11 and 11. An insulating body 12 covering the conductors and a watertight material 13 enclosed in the insulating body 12 so as to fill the space between the conductors 11; The formed fin 14 is provided and configured. The deterioration state determination indicator 1 is provided on the fin 14 of the overhead distribution line 10.

The fins 14 are formed on both sides of the outer surface of the insulator 12 in the longitudinal direction, and this portion is formed by an organic pigment and/or an inorganic pigment which is a coloring agent, for example, yellow organic pigments such as isoindolinone yellow and disazo. Carbon, which is a black inorganic pigment such as yellow, condensed azo yellow, anthraquinone yellow, red organic pigments such as diketopyrrolopyrrole, perylene red, condensed azo red, anthraquinone red, and blue organic pigments such as phthalocyanine blue. The deterioration state determination indicator 1 is formed by forming polyvinyl chloride or the like in which titanium oxide, which is a white inorganic pigment such as black, is appropriately mixed. Then, the color of the deterioration state determination indicator 1 changes (the details of change will be described later) due to aging due to long-term exposure to direct sunlight or wind and rain.

Here, when the overhead power distribution line 10 deteriorates, the power transmission efficiency decreases and the strength also decreases, so that the overhead power distribution line 10 is replaced, and the deteriorated overhead power distribution line 10 is collected by a trader. Therefore, the place where it was erected, its period and the state of deterioration are generally known. Therefore, the colorant mixture to be colored as the deterioration state determination indicator 1 is selected by performing a colorant deterioration test in consideration of the deterioration period of the overhead distribution line 10. For example, if you refill in 10 years, select a combination of pigments that keeps discoloring in 10 years, and if you refill in 20 years, discoloration continues in 20 years. A combination of pigments is selected.

The watertight material 13 is filled on the conductors 11 and 11 or between the conductors 11 and 11 when the conductors 11 and 11 are twisted together in order to prevent rainwater or the like from entering the insulator 12. Examples of the watertight material 13 include ethylene/ethyl acrylate copolymer (EEA) and ethylene/vinyl acetate copolymer (EVA).

The insulator 12 is formed of, for example, polyvinyl chloride (PCV), polyethylene, or the like, and is colored in a color that is inconspicuous, or a pigment is mixed (for example, carbon black) and formed by extrusion resin molding. .. At that time, the part of the fin 14 that becomes the deterioration state determination indicator 1 is also integrally formed simultaneously with the insulator 12 by extrusion molding.

[Operation of deterioration state determination method and deterioration state determination indicator]
An operator who inspects the deterioration state determination indicator 1 grasps in advance the color change state of the deterioration state determination indicator 1 by the colorant deterioration test in the color fading state grasping step (S1, S11), and then the on-site overhead distribution line 10 is checked. The state of deterioration of the overhead distribution line 10 can be estimated by comparing with the color state of the fin 14. When the color state of the deterioration state determination indicator 1 corresponds to the period before the period when the overhead distribution line 10 deteriorates in the colorant degradation test, it can be determined that the overhead distribution line 10 has not deteriorated yet. .. On the other hand, if the color condition of the deterioration state determination indicator 1 is the same as or longer than the period during which the overhead distribution line 10 deteriorates due to the colorant degradation test, or if the discoloration progresses further than that, it is determined that the overhead distribution line 10 is degraded. it can.

Next, two embodiments in which the deterioration state determination method and the deterioration state determination indicator according to the present invention are applied to an overhead distribution line will be described with reference to the drawings. FIG. 4 shows a second embodiment in which the deterioration state determination indicator according to the present invention is applied to an overhead distribution line, which is one of overhead lines. (a) is a side view, (b) is B- of (a). It is sectional drawing of a B line. In this embodiment, the overhead distribution line is the single wire cable 20. The single-wire cable 20 is generally configured to include a single conductor 21 and an insulator 22 formed of polyvinyl chloride (PCV), polyethylene, or the like that covers the conductor 21.

Then, the deterioration state determination indicator 2 according to the second embodiment is, as shown in FIGS. 4A and 4B, divided into a plurality of circumferential directions and extruded in the longitudinal direction with respect to the outer surface of the insulator 22. It is composed of a plurality of (here, three) vinyl lines formed by molding. Although the deterioration state determination indicator 2 is provided in three parts, it may be provided so as to cover the entire surface of the insulator 22.

The same color as that of the first embodiment described above can be used as the color of the deterioration state determination indicator 2. In addition, the color of the insulator 22 is, for example, green, and the color of the deterioration state determination indicator 2 is clearly different from the color of the insulator 22, and the color of the insulator 22 is easily visible to human eyes. It is possible to use yellow, which easily fades. In this case, the color of yellow gradually becomes lighter, and the state is judged by the change in the color. Of course, other color combinations are possible. In addition, as in the first embodiment, the insulator 22 and the deterioration state determination indicator 2 are formed into a linear shape by simultaneous extrusion molding, or the deterioration state determination indicator 2 is formed into a spiral shape by rotating during extrusion molding. You can Further, the deterioration state determination indicator 2 is not limited to the spiral shape, and may be an appropriate non-linear shape such as a waveform or a broken line shape. Note that the method of determining the deterioration state is the same as that of the first embodiment, and therefore its explanation is omitted.

As described above, the preferred embodiments of the present invention have been described in detail, but the present invention is not limited to the specific embodiments, and within the scope of the gist of the present invention described in the claims, It goes without saying that various modifications and changes are possible. For example, although the above-described deterioration state determination indicators 1 and 2 for the overhead distribution line are formed by extruding a resin in which a colorant is kneaded, they may be formed by injection molding. Further, as the resin to be molded, in addition to polyvinyl chloride (PCV) or polyethylene, any thermoplastic resin such as polypropylene, polyester, methyl methacrylate, PEEK can be used. Further, when there is no risk of the colorant peeling off, it is possible to color the surface with an acrylic, urethane, or epoxy coating liquid or adhesive.

The deterioration state determination indicators 1 and 2 according to the present invention are also applied to articles such as disaster equipment (emergency foods), fire extinguishers, tires, etc. that are stored for a relatively long period of time and require quality control. It is possible.

1, 2 Deterioration state determination indicator 10 Overhead distribution line 12 Conductor 12 Insulator 13 Watertight material 20 Single wire cable 21 Conductor 22 Insulator

Claims (16)

In a deterioration state determination method for determining the deterioration state of the target object based on the state of the color change caused by the secular change of the colorant that is color-coded to the target object whose deterioration state is to be determined,
The colorant at each stage in the process of changing the color of the colorant under the colorant deterioration test environment by performing a colorant deterioration test considering the environmental conditions in which the object is actually arranged for the colorant. A color fading state grasping step of grasping a correlation in advance as to how long the colorant corresponds to the color state when the color state in actual aging changes,
A colorant selection step of selecting a colorant whose color change continues in the period until the object deteriorates based on the correlation between the color change and the period grasped by the fading state grasping step;
From the actual color state of the colorant that has changed with the passage of a predetermined period for the object to which the colorant selected by the colorant selection step has been applied, the correlation found in the faded state grasping step An aging period estimation step for estimating the aging period based on
A deterioration state determination step of determining the state of deterioration of the object from the estimated aging period,
A deterioration state determination method comprising: In a deterioration state determination method for determining the deterioration state of the target object based on the state of the color change caused by the secular change of the colorant that is color-coded to the target object whose deterioration state is to be determined,
The colorant at each stage in the process of changing the color of the colorant under the colorant deterioration test environment by performing a colorant deterioration test considering the environmental conditions in which the object is actually arranged for the colorant. A color fading state grasping step of grasping a correlation in advance as to how long the colorant corresponds to the color state when the color state in actual aging changes,
Deterioration of the object at each stage in the process of deterioration of the object under the object deterioration test environment by performing an object deterioration test considering the environmental conditions in which the object is actually arranged. Deterioration state grasping step for grasping the correlation in advance as to how long the object corresponds to the state of deterioration when the state of actual aging changes,
The period until the deterioration of the object is estimated based on the correlation between the deterioration state and the period of the object grasped by the deterioration state grasping step, and the color change grasped by the fading state grasping step And a colorant selecting step of selecting a colorant whose color change continues in the period until the object deteriorates based on the correlation between the period and the period,
From the actual color state of the colorant that has changed with the passage of a predetermined period for the object to which the colorant selected by the colorant selection step has been applied, the correlation found in the faded state grasping step An aging period estimation step for estimating the aging period based on
A deterioration state determination step of determining how much the actual deterioration state of the object is based on the correlation grasped by the deterioration state grasping step from the aged period estimated by the aged period estimation step,
A deterioration state determination method comprising: The deterioration state determination method according to claim 1 or 2,
By adjusting the mixing ratio of the colorants of two or more similar colors having different color change states under the colorant deterioration test environment, the period during which the color change state of the colorant is maintained is adjusted. A deterioration state determination method, which comprises adjusting the target object according to the aging period until deterioration. The deterioration state determination method according to any one of claims 1 to 3,
The said coloring agent is an organic pigment and/or an inorganic pigment, The deterioration state determination method characterized by the above-mentioned. The deterioration state determination method according to any one of claims 1 to 4,
The colorant is
Any one or more of yellow organic pigments such as isoindolinone yellow, disazo yellow, condensed azo yellow, and anthraquinone yellow,
Any one or a plurality of red organic pigments such as diketopyrrolopyrrole, perylene red, condensed azo red, and anthraquinone red,
Phthalocyanine blue, which is a blue organic pigment,
A deterioration state determination method characterized by being a mixture of The deterioration state determination method according to claim 5,
Furthermore, the deterioration state determination method is characterized by further mixing carbon black, which is a black inorganic pigment, and/or titanium oxide, which is a white inorganic pigment. The deterioration state determination method according to any one of claims 1 to 6,
A deterioration state determining method, wherein the object is a covering material for an overhead wire. The deterioration determination method according to claim 7,
The overhead wire is a distribution line, and the coloring agent is color-coded linearly or non-linearly with a predetermined width on the covering material of the distribution line, or color is applied to a fin provided on the distribution line. Degradation state determination method. In the deterioration state determination indicator for determining the deterioration state of the object based on the state of the color change caused by the secular change of the colorant that is color-coded on the surface of the target object whose deterioration state is to be determined,
The indicator is
By performing a colorant deterioration test in consideration of the environmental conditions in which the object is actually placed, the color of each stage in the process of color change is the color in the case of how much time has elapsed in actual aging. It is composed of a colorant that has a correlation with the color change and period corresponding to the state of
From the estimated aging period by estimating the aging period based on the correlation between the color change and the period from the actual color state of the colorant that has been color-coded for the object for a predetermined period of time. A deterioration state determination indicator characterized by determining the state of deterioration of the object. In the deterioration state determination indicator for determining the deterioration state of the target object based on the state of the color change caused by the secular change of the colorant that is color-coded to the target object whose deterioration state is to be determined,
The indicator is
By performing a colorant deterioration test in consideration of the environmental conditions in which the object is actually placed, the color of each stage in the process of color change is the color in the case of how much time has elapsed in actual aging. It is composed of a colorant that has a correlation with the color change and period corresponding to the state of
By subjecting the colorant to an object deterioration test in consideration of the environmental conditions in which the object is actually arranged, how long the deterioration state of each stage in the deterioration process has actually elapsed If the color of the colorant is assigned to the object, the color of the colorant of which has been grasped in advance for a predetermined period, by correlating the color of the object that has a correlation with the state of deterioration corresponding to the state of deterioration and the period. Estimate the aging period based on the correlation between the color change and the period from the state, and determine the deterioration state of the object based on the correlation between the deterioration state and the period from the estimated aging period A deterioration state determination indicator characterized by the following. The deterioration state determination indicator according to claim 9 or 10,
By adjusting the mixing ratio of the colorants of two or more similar colors having different color change states under the colorant deterioration test environment, the period during which the color change state of the colorant is maintained is adjusted. A deterioration state determination indicator characterized by being adjusted according to the aging period until the object deteriorates. The deterioration determination indicator according to any one of claims 9 to 11,
The deterioration state indicator, wherein the colorant is an organic pigment and/or an inorganic pigment. The deterioration state determination indicator according to any one of claims 9 to 12,
The colorant is
One or more of yellow organic pigments such as isoindolinone yellow, disazo yellow, condensed azo yellow, and anthraquinone yellow;
Any one or a plurality of red organic pigments such as diketopyrrolopyrrole, perylene red, condensed azo red, and anthraquinone red,
Phthalocyanine blue, which is a blue organic pigment,
A deterioration state determination indicator characterized by being a mixture of. The deterioration state determination indicator according to claim 13,
Further, the deterioration state determination indicator is characterized by further mixing carbon black which is a black inorganic pigment and/or titanium oxide which is a white inorganic pigment. The deterioration state determination indicator according to any one of claims 9 to 14,
A deterioration state determination indicator, wherein the object is a covering material for an overhead wire. The deterioration determination indicator according to claim 15,
The overhead wire is a distribution line, and the coloring agent is color-coded linearly or non-linearly with a predetermined width on the covering material of the distribution line, or color is applied to a fin provided on the distribution line. Degradation status judgment indicator.

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