JPH081420B2 - Light resistance test method and light resistance tester - Google Patents

Description

Detailed Description of the Invention

[0001]

[Industrial application] The present invention relates to a light resistance test or a weather resistance test for accelerating the deterioration of paints, plastics, fibers, etc. mainly due to light. TECHNICAL FIELD The present invention relates to a method and apparatus capable of reproducibly testing evaluation of color measurement, gloss, etc. of a sample whose surface properties change due to influence.

[0002]

2. Description of the Related Art Recent materials and products such as paints, plastics and fibers have remarkably improved light resistance. For this reason, for example, in the light resistance test and the weather resistance test performed by using the device specified in Japanese Industrial Standard (JIS) D 0205 "General rules for weather resistance test of automobile parts", the test time until an appropriate evaluation is significantly increased. It was way. As the test time increases, the total light energy amount received by each sample surface increases, and the total light energy amount received by each sample surface remarkably differs depending on the arrangement state of the sample. This has been one of the causes of variations in test results.

Further, the increase in the test time also increases the delay in the light resistance research and development and the time required for the quality inspection. For this reason,
As a method for further shortening the test time, adoption of a large-capacity light source and increase in the number of light sources are conceivable, but existing equipment cannot handle it. Therefore, a method has been adopted in which the sample is brought closer to the light source and the light energy received by the sample surface is increased to promote deterioration of the sample, which can be relatively easily performed by the existing apparatus. In addition, in order to make the light energy received by the sample surface uniform, the sample is placed close to the light distribution curve of the light source disclosed in JIS B 7751 “UV carbon arc lamp type light resistance and weather resistance tester”. Enabled sample holders and the like have been used.

Now, as a device for carrying out the above-mentioned test method, a rotating frame which is standardly used in the light resistance tester disclosed in JIS D 0205 (a holder on which a sample is attached is hung and rotated around a light source). Frame) diameter is about 980
A device based on the mm device and having a smaller rotating frame diameter has been developed and used.

FIG. 3 shows an example of this, in which a 7 Kw xenon arc lamp is used as a light source, the diameter of the rotating frame is set to about 480 mm, which is 1/2, and a sample holder capable of placing a sample close to the light distribution curve of the light source is attached. The distance from the light source is shortened and the light receiving state of the sample is made uniform.

In FIG. 3, a 7 Kw xenon arc lamp is placed as a light source 16 vertically in the center of a test tank 17. The sample rotation system 2 in which the sample 11 is placed at a position close to the light distribution curve of the light source 16 and is rotated around the light source 16 is a rotation frame 12 and a rotation device provided at the bottom of the device for rotating the rotation frame 12. 6 and a so-called three-stage sample holder 10 as shown in FIG. Also, the light source 16
Does not discharge linearly on its central axis,
In consideration of the case where a light energy receiver and a device (not shown) such as a spray tube for spraying water on the sample are placed between the sample surface and the sample surface, The rotating device 6 normally rotates the rotating frame 12 at 1 rpm (1 rotation per minute) or 3 times so that the received light energy becomes uniform.
It is designed to rotate at rpm (3 revolutions per minute) ,
The device is designed to rotate at 1 rpm (1 revolution per minute) .

Generally, the deterioration of the sample 11 depends on the radiant energy from the light source 16 and the temperature of the sample 11. Here, in order to obtain the same test result for all the samples 11, as for the radiant energy, the radiant energy received by all the samples can be made uniform by using the three-stage sample holder 10 or the like. It depends on whether the temperature of the sample 11 is uniform.

In the apparatus shown in FIG. 3, the temperature is adjusted by circulating the air sent from the lower part of the test tank 17 (circulating air).
The flow is performed by passing it through the front and back sides of the sample 11, but in order to prevent various properties of the sample surface, such as raised hair, from falling in one direction under the influence of the air flow, the rectifier 22 is used. And the like, the surface side of the sample 11 is measured at an average of 0.3 m / sec to 0.
An air introduction system 3 configured to allow a wind speed in the range of 8 m / sec to flow, and to flow at a faster wind speed on the back side.
Is used. The surface temperature of the sample 11 is detected by a so-called black panel thermometer 18 arranged at the same position as the surface of the sample, and the temperature and the amount of circulating air are adjusted so as to maintain the test temperature from the detected temperature. .

In the apparatus shown in FIG. 3, a conditioning room 19 is provided adjacent to the test tank 17, and the circulating air is sucked in the conditioning room 19 by a fan 21 rotated by a motor 20 with a constant air volume and a constant wind speed. The sample surface side is blown by an average of 0.5 m by the rectifier 22 installed below the rotary frame 12.
/ Sec, and the air introduction system 3 is configured to allow the back side to flow at an average wind speed of 0.8 m / sec. The temperature is controlled to a predetermined temperature by the heater 23, the cooler 24, and the refrigerator 25, and the humidity is adjusted by a humidity generator (not shown).
Further, reference numeral 26 in the drawing denotes a cooling water pipe for the xenon lamp.

[0010]

In the above device,
The sample 1 is placed in the three-stage sample holder 10 of the sample rotation system 2.
By attaching 1 and attaching it to the rotary frame 12 without a gap, a barrel-shaped space with both open ends is formed. The size of this space is determined by the diameter of the rotary frame 12 and the length of the sample holder 10. Sample holder 1
The length of 0 can be determined from the optimum relationship between the effective irradiation range of the light source 16 and its light distribution curve so that the irradiance received on the sample surface is uniform and the sample 11 can be mounted efficiently.

On the surface of the sample, air whose wind direction and speed is adjusted by the air introduction system 3 flows, and making the wind speed uniform is not efficient because the apparatus becomes complicated and the cost is high. The current situation is to allow fluctuations in.

FIG. 5 shows a horizontal cross section of the rotary frame 12 in AA 'in the apparatus of FIG. 3, where a, b, c and d are the positions where the wind speed on the surface of the sample was measured. The air introduction system 3 of the apparatus shown in FIG.
Although it was adjusted so as to be 5 m / sec, as shown in Table 1, some variations are recognized. This measurement was performed with the sample rotation system 2 stopped.

[0013]

[Table 1]

The results of measuring the light energy received by the sample surface and the surface temperature of the sample at that time in the light resistance test using the above apparatus are shown below.

(1) Results of measurement of light energy on sample surface The three-stage sample holder 10 of FIG. 4 was placed around the rotary frame 12 of the apparatus of FIG. The measurement position of the light energy is the position of A to F in Fig. 4 (the position of the dotted circle).
Then, the irradiance at position d was controlled at 120 W / m ² , and the ratio at each position when this was set to 100 was taken. In addition, the distance between the center of the light source 16 and the middle position between C and D (the position of the black circle in the figure) is 240 mm.
White thick paper was attached as a dummy to the irradiation window 27 of 0, and the rotating frame 12 was rotated at 1 rpm (one rotation per minute) . Table 2 shows the ratio of the irradiance of each sample surface at this time.

[0016]

[Table 2]

From this table, the irradiance (a,
(A, u, o, and f positions) are the reference sample surface (d position)
Is within ± 1.3%, which is almost uniform.

(2) Result of measurement of surface temperature of sample As shown in FIG. 4, the sample 11 is attached to the three-stage sample holder 10 as a sample 11 with a black resin plate having a back surface of 10 mm thick urethane adhered thereto. A thermometer such as a thermocouple was attached to each sample surface position a to f for measurement. The irradiance at this time is controlled to 120 W / m ² which is the same as the above (1), and the temperature inside the test tank 17 is controlled to 35 ° C. by a dry-bulb thermometer placed in a place where the light from the light source 16 does not directly hit. And is an average value measured 10 times at 10 minute intervals. At this time, the wind speed of the air flowing on the front surface side and the back surface side of the sample 11 by the air introduction system 3 was measured with the rotating frame 12 stopped, and the sample surface side had an average of 0.5 m / sec and the back surface had an average. It is 0.8 m / sec. Sample 11 at this time
Table 3 shows the surface temperature of. The temperature of the black panel thermometer 18 at this time was 75 ° C.

[0019]

[Table 3]

From Table 3, the difference between the maximum and minimum surface temperatures of the sample was 5 ° C. Especially, the temperatures at positions b, c, and d were higher than those at other positions.

As described above, in the past, the light energy received by the sample surface could be made uniform, but the surface temperature could not be made uniform, resulting in large variations in various evaluations after the light resistance test.

Since it is not practical to measure the temperature of each sample in the light resistance tester, the test temperature is generally represented by the indicated temperature of a black panel thermometer arranged at the same position as the sample surface. . The allowable range of the indicated temperature is ± 3 ° C, but recently ± 1 ° C is being standardized. That is, the stricter control is required from the maximum and minimum difference of 6 ° C to 2 ° C.

By the way, the surface temperature of the sample differs depending on the color and material of the surface even if the black panel temperature indicates the same temperature, and is generally higher than the temperature indicated by the black panel thermometer. Therefore, it is said that it is desirable that the difference between the maximum and minimum surface temperatures of the samples is within 3 ° C.

Therefore, in order to eliminate such variations in the surface temperature of the sample 11, Japanese Patent Application No.
The sample holder 10 disclosed in Japanese Patent Laid-Open No. 43244/1994 (Japanese Patent Laid-Open No. 6-235693) was developed. That is, based on the air flow of the air introduction system 3 (the flow in which the wind speed on the back surface side of the sample is made larger than that on the front surface side), the end of the irradiation window 27 of the sample holder 10 on the downstream side of the flow. An opening 28 is formed with the end of the sample 11 attached to the irradiation window 27. At this time, since a negative pressure is generated on the front surface side and the back surface side of the sample 11, the air flowing on the front surface side flows out from the opening 28 to the back surface side, and the air flowing on the sample front surface side uniformly hits the entire sample surface. The temperature of the entire surface of the sample 11 is made uniform.

Using this sample holder 10, the above (2)
Table 4 shows the results of measuring the surface temperature of Sample 11 under the same conditions as
Is. From Table 4, it can be seen that the surface temperature of Sample 11 is uniform with the maximum and minimum difference being 1 ° C.

[0026]

[Table 4]

However, in such a sample holder 10, since the irradiation window 27 is provided with the opening 28, the irradiation area of the sample 11 is reduced and the size of the sample 11 is adjusted to the opening 28.
Therefore, it was troublesome to manufacture the sample 11. In addition, a long sample having a length similar to that of the sample holder 10 cannot be attached, and the sample 1
The size of 1 limited the test. Further, the size of the opening 28 needs to be adjusted in advance depending on the test conditions, that is, the test temperature and the wind speeds flowing on the front and back surfaces of the sample, so that the test itself is troublesome.

Therefore, there has been a strong demand for development of a test method which eliminates the above-mentioned drawbacks and can easily make the surface temperature uniform irrespective of the surface properties of the sample, and an apparatus for embodying the method. .

[0029]

In order to solve the above problems, the following method and device are used as the means.

(1) A light source arranged in a test tank, a holder for mounting a sample and a holder for mounting the sample so that the light from the light source is uniformly received at a position substantially matching the light distribution curve of the light source. A sample rotation system consisting of a rotating frame that rotates about a central axis and air is made to flow in the same direction as the rotation axis, and air is supplied to the surface of the sample attached to the sample rotation system at 0.3 m / sec to 0.8 m / sec. in tests performed using a light resistance test machine with an air injection system for adjusting the temperature was allowed to flow in m / sec average wind speed (V), a rotating frame of the sample rotating system, the center of the light source
The distance (r) to the central part of the holder is set to 200 mm to 325 mm, and the moving speed of the sample arranged at a distance within the above range due to the rotation of the rotary frame with respect to the average wind speed (V) is 0.35.
V m / sec to 0.5 V m / sec , within this range
Rotate the rotation frame of the sample rotation system at a constant rotation speed
Then, rotate it in the opposite direction at the same speed, and repeat this.
Return light resistance test method.

[0031]

(2) As a device for embodying the light resistance test method of (1 ) above, a light source arranged in a test tank and a plurality of samples are arranged around the light source at a position substantially matching the light distribution curve of the light source. arranged in order to rotate the sample a central axis of the light source as a rotation axis, it consists of a rotary frame for rotating attached to the holder and the holder mounting the sample, in this rotating frame, the center of the light source and the holder central Distance (r) to the part is 2
A sample rotation system having a range of 00 mm to 325 mm, air is caused to flow in the same direction as the rotation axis, and air is supplied to the surface of the sample mounted on the sample rotation system from 0.3 m / sec to 0.
An air introduction system that flows at an average wind speed (V) of 8 m / sec, and the average wind speed (V) of the sample mounted on the rotating frame.
Moving speed of 0.35 V m / sec to 0.5 V m / se
A light resistance tester equipped with a reversing system that reverses the direction of rotation corresponding to c at a constant number of revolutions within that range.

[0033]

By adopting the above means, the number of rotations of the rotary frame is increased to an optimum range according to its size, so that the air flow state in the barrel-shaped space is improved,
Further, the uniformity of the air flowing on the surface of the sample is promoted, and the surface temperature of the sample can be made uniform.

Here, the number of rotations of the rotary frame can be converted from the relationship between its size and the moving speed of the sample. That is, the mean of the wind velocity (V) flowing on the sample surface is 0.3 m /
Since there is a relationship of 0.35 V m / sec to 0.5 V m / sec with the moving speed of the sample attached to the rotating frame at sec to 0.8 m / sec, the minimum rotation speed is the center of the light source and the holder.
The distance (r) to the part is larger than 3 rpm in a rotating frame (equivalent to a diameter of 650 mm) of 325 mm, and the maximum number of rotations is the above (r).
21 rpm with a 200 mm rotating frame (equivalent to a diameter of 400 mm)
It will be smaller.

Since the velocity of the wind received by the surface of the sample can be regarded as a combination of the wind velocity of the air introducing system and the moving velocity of the sample due to the rotation of the rotary frame, the air sent from the air introducing system is naturally used. Greater than the wind speed of. Therefore, the surface properties of the sample for its surface by the influence of the air flow results in the habit fall fall in a predetermined direction, not only a certain direction rotates the rotation of the rotary frame, a constant rotational speed in a range of the rotation Same rotation after rotation
Such a phenomenon can be eliminated by repeating several reversing rotations, the comparison with the original sample can be performed under the same conditions, and the light resistance test with good reproducibility becomes possible.

[0036]

EXAMPLES A light resistance tester 1 of an example of the present invention will be described below with reference to the drawings. FIG. 1 is a partial configuration diagram of a light resistance tester 1 in which a light source 16 is vertically arranged in a test tank 17 in order to perform the light resistance test method of the present invention, and mainly comprises a sample rotation system 2 (see FIG. 3) and an air introduction. 4 shows a part of the system 3 (see FIG. 3). Further, this configuration is the same as the configuration of FIG. 3 except the configuration of the reversing system 4 part and the rotating frame support 5 part of the sample rotation system 2.

In FIG. 1, the reversing system 4 is a rotary frame.
Rotation speed setting to set the rotation speed per 12 minutes
Contact the regulator 9 and the motor (not shown) of the rotating device 6
And a rotation speed switching device 7 for switching the rotation speed, and a motor
And reversing switch 8 for reversing the rotation of the
The reverse switch 8 and the rotation speed setting device 9 are not shown in the figure.
It is provided on the board. Now, when the reversing switch 8 is ON
At this time, the rotation frame 12 is set to 1 at the rotation speed set in the rotation speed setting device 9.
After rotating for a minute, the motor rotation reverses
Rotate in the opposite direction for 1 minute. This is the test time setting device
Repeat alternately within the test time set to (not shown).
Further, in this embodiment, an inverter is used for the rotation speed switching device 7.
In advance, set the rotation speed of the rotating frame 12 according to the frequency.
It is stored in the controller 9 and is electrically adjusted according to the number of rotations.
The number of rotations of the motor is switched. Rice cake
Mechanically switch the rotation speed using gears, pulleys, etc.
The method of obtaining may be used. (Note that the reversing switch 8 is set to OF
When set to F, the rotation frame 12 of the prior art is reversed.
Do not drive. )

Further, in the apparatus of FIG. 3, when the sample holder 10 is attached, the rotary frame support 5 is located inside the sample holder 10, and the heat storage thereof slightly affects the surface temperature of the sample 11. Signs were seen (ie
Since the surface temperature of the sample 11 attached to the sample holder 10 close to the support column 5 was higher than the other samples 11 by an average of about 1 ° C.), the support column 5 is placed on the back side of the sample holder 10 in this embodiment. It is arranged so that the upper and lower rings 13 and 14 of the rotary frame 12 are supported by the support rods 15 fixed to the column 5 at right angles (horizontal).

The experimental results using the apparatus of the above embodiment will be described below.

Experimental Example 1 In the above apparatus, the distance (r) between the light source and the center of the sample holder
Is 240 mm (corresponding to a diameter of 480 mm), the rotation speed of the fan of the air introduction system is adjusted in advance, and the average wind speed (V) of the air (dotted arrow) flowing through the sample surface through the rectifier is 0.5 m. / Sec. Here, the rotating frame was rotated at a rotation speed (10 rpm) such that the moving speed of the sample was 0.5 V m / sec. The sample, the irradiance received by the sample surface, and the temperature in the test tank were the same as the conditions performed to obtain the results shown in Tables 1 to 4.

Table 5 shows the measurement results of the surface temperature of the sample under these conditions. Note that a to f in Table 5 are positions a to f in FIG.

[0042]

[Table 5]

From Table 5, the surface temperature of the sample was close to the result of Table 4, and the maximum and minimum temperature difference was 1 ° C., which was uniform.

Experimental Example 2 Under the same conditions as in Experimental Example 1, the sample was a raised fiber, and the color difference (color difference ΔE ^* by the CIE color system) before and after the light resistance test (test time 100 hours) was measured. There are four types of samples, red, brown, blue, and gray, each of which is 1 from the same large format sample.
Cut out 8 points, use 6 points each in one test,
The average color difference for each sample was determined. This was repeated 3 times. Table 6 shows the results. In general, when the color difference is 1.5 or more, it is “conspicuous” in a sensory expression, and evaluation is performed based on this numerical value.

[0045]

[Table 6]

From Table 6, the color difference (ΔE ^* ) is as follows ^: red sample has a maximum of 1.9, brown sample has a maximum of 1.5, and blue sample has a maximum of 1.
8, the gray sample had a maximum difference of 1.7, and the reproducibility of the test was not obtained.

Experimental Example 3 In Experimental Example 2, the rotating frame was rotated at 10 rpm (10 revolutions per minute).
Rotate and repeat the rotation that reverses every 1 minute (or 10 rotations).
The results when Rikae shown in Table 7.

[0048]

[Table 7]

From Table 7, the color difference (ΔE ^* ) is 0.3 for the red sample, 0.2 for the brown sample, and 0 for the blue sample.
4, the gray sample has a maximum difference of 0.6, and the reproducibility of repetition is much improved as compared with Experimental Example 2.

Experimental Example 4 Next, the average wind velocity (V) flowing on the sample surface in Experimental Example 1 was set to 0.3 m / sec, and the moving speed of the sample was 0.35 V m / sec.
The surface temperature of the sample when the rotating frame was rotated at the rotation speed of sec (4.2 rpm) was measured in the same manner as in Experimental Example 1. Table 8 shows the results.

[0051]

[Table 8]

From Table 8, the difference between the maximum and minimum surface temperatures of the sample is 3 ° C., which is non-uniform as compared with Experimental Example 1, but almost satisfactory results are obtained.

Experimental Example 5 Also, under the same conditions as in Experimental Example 4, using the same raised fiber as in Experimental Example 2 as a sample, the result of measurement was the color difference (ΔE ^* ).
The red sample had a maximum difference of 2.3, the brown sample had a maximum difference of 1.8, the blue sample had a maximum difference of 2.8, and the gray sample had a maximum difference of 1.5, and the reproducibility of the test was not obtained.

Experimental Example 6 In Experimental Example 5, the rotating frame was set to 4.2 rpm (4.2 revolutions per minute).
Rotate with and rotate every 1 minute (or 4.2 rotations)
If repeat rolling, a color difference (Delta] E ^*), up to 0.5 red samples, maximum 0.4 brown sample, blue sample up to 0.7, gray sample is the difference between the maximum 0.8 observed Therefore, the reproducibility of repetition is much improved as compared with Experimental Example 5.

Experimental Example 7 Next, the average wind velocity (V) flowing on the sample surface in Experimental Example 1 was set to 0.8 m / sec, and the moving speed of the sample was 0.5 V m / se.
The surface temperature of the sample when the rotating frame was rotated at a rotation speed of c (16 rpm) was measured in the same manner as in Experimental Example 1. The results are shown in Table 9.

[0056]

[Table 9]

From Table 9, the difference between the maximum and minimum surface temperatures of the sample is 3 ° C., which is non-uniform as compared with Experimental Example 1, but almost satisfactory results are obtained.

Experimental Example 8 Also, under the same conditions as in Experimental Example 7, the same napped fiber as in Experimental Example 2 was similarly measured, and the result was the color difference (ΔE ^* ).
The red sample had a maximum difference of 2.1, the brown sample had a maximum difference of 1.6, the blue sample had a maximum difference of 2.0, and the gray sample had a maximum difference of 2.8, and the reproducibility of the test was not obtained.

Experimental Example 9 In Experimental Example 8, the rotating frame was rotated at 16 rpm (16 rotations per minute).
Rotate and rotate every 1 minute (or 16 rotations)
If you Rikae, a color difference (Delta] E ^*), the red sample up to 0.4, brown sample up to 0.3, up to the blue sample 0.
6. The gray sample had a maximum difference of 0.7, and the reproducibility of repetition was much improved as compared with Experimental Example 8.

The above-mentioned Experimental Examples 1 to 9 are the light source and the sample.
Distance (r) to the center of the holder is 240 mm (diameter 480
(mm equivalent) is the test result when using a rotating frame. Next, (r) is 325 mm (equivalent to a diameter of 650 mm) and (r)
The test results performed using a rotating frame having a diameter of 200 mm (equivalent to a diameter of 400 mm) will be described.

Experimental Example 10 The distance (r) between the light source and the center of the sample holder was 200 mm.
When using a rotating frame (equivalent to a diameter of 400 mm).

(1) As in Experimental Example 4, the average wind velocity (V) flowing on the surface of the sample was set to 0.3 m / sec, and the sample was rotated at a rotation speed (6 rpm) such that the moving speed was 0.35 V m / sec. The surface temperature of the sample when the frame was rotated is almost the same as in Table 8,
The difference between the maximum and minimum was 3 ° C. Also, as in Experimental Example 7, the average wind velocity (V) flowing on the sample surface was 0.8 m / se.
c, the surface temperature of the sample when the rotating frame was rotated at a rotation speed (20 rpm) at which the moving speed of the sample was 0.5 V m / sec was almost the same as in Table 9, and the difference between the maximum and minimum was 3 It was ° C.

[0063] (2) The same raised fibers as a sample of Experimental Example 2 (1), and repeat the rotation to reverse the rotary frame every each 6 rotates and 20 rotate, measured in the same manner as in Experimental Example 2 The obtained results were almost the same as those of Experimental Example 6 and Experimental Example 9 in terms of color difference (ΔE ^* ). On the contrary, when the rotating frame was not reversed, the same color difference (ΔE ^* ) as in Experimental Examples 5 and 8 was not obtained.

Experimental Example 11 Distance (r) between the light source and the center of the sample holder was 325 mm
When using a rotating frame (equivalent to a diameter of 650 mm).

(1) As in Experimental Example 4, the average wind velocity (V) flowing on the sample surface was set to 0.3 m / sec, and the sample was rotated at a rotation speed (3 rpm) of 0.35 V m / sec. The surface temperature of the sample when the frame was rotated is almost the same as in Table 8,
The difference between the maximum and minimum was 3 ° C. Also, as in Experimental Example 7, the average wind velocity (V) flowing on the sample surface was 0.8 m / se.
c, the surface temperature of the sample when the rotating frame was rotated at a rotation speed (20 rpm) at which the moving speed of the sample was 0.5 V m / sec was almost the same as in Table 9, and the difference between the maximum and minimum was 3 It was ° C.

[0066] (2) The same raised fibers as in Experimental Example 2 (1) as a sample, and repeat the rotation to reverse the rotary frame every three revolutions per and 12 rotate, measured in the same manner as in Experimental Example 2 The obtained results were almost the same as those of Experimental Example 6 and Experimental Example 9 in terms of color difference (ΔE ^* ). On the contrary, when the rotating frame was not reversed, the same color difference (ΔE ^* ) as in Experimental Examples 5 and 8 was not obtained.

When the uniformity of the surface temperature of the sample is the best in Experimental Example 10, the average wind velocity (V) of the air flowing on the sample surface is 0.5 m / sec and the moving velocity of the sample is 0. 5V
The rotation speed (14 rpm) was m / sec, and the maximum and minimum temperature difference was 1 ° C. In Experimental Example 11, the average wind speed (V) of the air flowing on the sample surface was 0.5 m / sec to 0.6 m / sec, and the moving speed of the sample was about 0.5 V m / se.
c is the number of revolutions (7.5 rpm to 8.5 rpm),
The maximum and minimum temperature difference was also 1 ° C.

As described above through the experimental examples , the distance (r) between the light source and the center of the sample holder is 200.
mm-325 mm (diameter 400 mm-650 mm equivalent), using a rotating frame with a size of 0.35 V m
/ Sec to 0.5 V m / sec, the surface temperature of the sample becomes uniform, and if the rotation of the rotating frame is repeated at regular intervals, reproducibility can be obtained in the evaluation of the color difference of the napped fibers. It was

Further, according to additional experiments by the inventors, the distance (r) between the light source and the center of the sample holder is 200 mm to 3 mm.
A rotating frame having a size of 25 mm (equivalent to a diameter of 400 mm to 650 mm) and a sample moving speed of 0.35 V m / sec.
The surface temperature of the sample was not uniform except for the relationship of 0.5 V m / sec.

FIG. 2 is a partial block diagram of the apparatus of the embodiment other than the above. This device has a light source 16 horizontally arranged in a test tank 17, and is provided with a rotary frame 12 having a central axis of the light source 16 as a rotation axis. Only a rotating method of the rotating frame 12 and a method of introducing air are different. The device is basically the same as that of the above-mentioned embodiment. In this embodiment, a 4 Kw metal halide lamp is used as the light source 16.

In FIG. 2, the rotary frame 12 is provided with a rotary ring 30 having a larger diameter than the ring 29 and having the same diameter on the outside of a ring (corresponding to the upper and lower rings in FIG. 1) 29 for mounting the sample holder 10. The rotating ring 30 is connected through the rotating frame support 5, and the rotating ring 30 is at the same height, that is, the rotating frame 1
The rotating small ring (two fixed to each shaft) 32 fixed to two shafts (one not shown) 31 arranged horizontally and in parallel so that 2 becomes horizontal, receives this shaft 31. Rotating ring 3 by rotating with a motor (not shown)
0 is rotated (the rotation frame 12 is rotated).
Here, the shaft 31 may rotate only one side. Further, the two rings 29 for mounting the sample holder 10 are connected by the rotary frame support 5 and the support rod 15 as in the above embodiment.

Further, the introduced air is introduced in the direction of the rotation axis from one side of the test tank 17 in which the rotation axis intersects at right angles. The humidity, air volume, and wind speed are adjusted. Reference numeral 22 is a rectifier.

Using the apparatus of this embodiment, the same experiments (Experimental Examples 1 to 11) as those of the above-mentioned Examples were conducted, but there were some differences, but the experimental results were similar to those of the above-mentioned Experimental Examples. I was able to get it.

[0074]

According to the present invention, the irradiance on the sample surface can be made uniform and the temperature on the sample surface can be made uniform in the light resistance test, and accurate test results can be obtained. In addition, the test can be performed without the influence of the surface properties of the brushed sample, etc., and the repeatability of the repeat test is improved, so the discrepancy between the test results on the manufacturing side and the receiving side can be resolved, and smooth business transactions can be performed. became. further,
Japanese Patent Application No. 5-43244 (Japanese Patent Application Laid-Open No. 6-235693)
Unlike the sample holder disclosed in, there is no limitation on the size of the sample, and a long sample can be easily attached.

[Brief description of drawings]

FIG. 1 is a partial configuration diagram of an example of a light resistance tester for performing a light resistance test method of the present invention.

FIG. 2 is a partial configuration diagram of an example other than the above, which is an example of a light resistance tester for performing the light resistance test method of the present invention.

FIG. 3 is a configuration diagram of an apparatus in which a rotating frame of a light resistance tester conforming to JIS D 0205 is downsized.

FIG. 4 is a front and side view of a three-stage sample holder.

[5] a horizontal cross-sectional view of the rotary frame portion of FIG.

FIG. 6 Japanese Patent Application No. 5-43244 (Japanese Patent Laid-Open No. 6-2356)
93) is a front and side view of the sample holder disclosed in No. 93) .

[Explanation of symbols]

 1 Light resistance tester 2 Sample rotation system 3 Air introduction system 4 Inversion system 6 Rotation device 7 Rotation speed selector 8 Inversion switch 9 Rotation speed setting device 10 Sample holder (three-stage sample holder) 11 Sample 12 Rotation frame 16 Light source 17 Test Tank 22 rectifier

Claims (2)

[Claims] 1. A light source arranged in a test tank, and a holder for mounting a sample and a center of the light source for mounting the holder so that radiation from the light source is uniformly received at a position substantially matching the light distribution curve of the light source. A sample rotating system consisting of a rotating frame that rotates about an axis as a rotating shaft, and air is made to flow in the same direction as the rotating frame so that the air is 0.3 m / sec to 0.8 m on the surface of the sample attached to the sample rotating system. In a test carried out using a light resistance tester equipped with an air introduction system for controlling the temperature so that the air flow at an average wind speed (V) of 1 / sec, the center of the light source and the ho
The distance (r) to the central part of the rudder is set to 200 mm to 325 mm, and the moving speed of the sample arranged at a distance within the above range due to the rotation of the rotary frame with respect to the average wind speed (V) is 0.35.
V m / sec to 0.5 V m / sec , within this range
Rotate the rotation frame of the sample rotation system at a constant rotation speed
Then, rotate it in the opposite direction at the same speed, and repeat this.
A light-fastness test method characterized by returning . 2. A light source arranged in a test tank, and the arrangement of the light source.
Place multiple samples around the light source at positions that closely match the light curve.
Place the sample and rotate the sample with the central axis of the light source as the axis of rotation.
In order to mount the sample and this holder,
This rotating frame consists of a rotating frame for attaching and rotating.
Is the distance between the center of the light source and the center of the holder
Sample rotation system where (r) is in the range of 200 mm to 325 mm
System and air in the same direction as the rotary shaft,
The surface of the sample attached to the transfer system is 0.3 m /
Introduction of air flowing at an average wind speed (V) of sec to 0.8 m / sec
System and the average wind of the sample mounted on the rotating frame
Moving speed for speed (V) 0.35 V m / sec to 0.5
The rotation direction of the rotation corresponding to V m / sec is set within that range.
It was equipped with a reversing system that reverses every constant number of revolutions.
A characteristic light resistance tester.