GB/T 31899-2015 English PDF (GBT31899-2015)

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GB/T 31899-2015: Textile - Tests for Weather Resistance - UV Light Exposure
GB/T 31899-2015
Textile - Tests for weather resistance - UV light exposure
ICS 59.080.01
W04
National Standards of People's Republic of China
Textiles weathering test UV exposure
Issued on. 2015-09-11
2016-04-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
The standard proposed by China Textile Industry Association.
The standard basis by the National Textile Standards Technical Committee of Standardization Technical Committee (SAC/TC209/SC1) centralized.
This standard was drafted. Hangzhou Paradise Umbrella Group Co., Ltd., China Textile Standard (Beijing) Inspection and Certification Center Co., Ltd., Jiangxi Chang-seok households
Outer Leisure Products Co., Ltd. (China) Nissin Textile Co., Ltd China North Industries fifty nine Research Institute, the United States Ke Pannuo public laboratory equipment
Division Shanghai office.
The main drafters of this standard. Heling Jun, Zhang Lili, Xu Road, Xu Baiqing, Lv Shiliang, Tianyue E, Zhang Heng, Sunxing Lei.
Textiles weathering test UV exposure
1 Scope
This standard specifies the test methods for measuring exposure to UV aging of textiles and outdoor performance before and after aging change.
This standard applies to all kinds of outdoor textile materials and products.
Note. This method of application and limitations, see Appendix A.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 250 textile color fastness test assessing change in color like the gray card
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
Fluorescent UV lamps fluorescentUVlamp
The total amount of light energy output of the radiation generated in the ultraviolet region of the spectrum (e.g. 400nm or less) of at least 80% of the fluorescent lamp.
3.2
Irradiance irradiance
Radiation flux per unit area of a predetermined wavelength range, in units of watts per square meter (W/m2).
3.3
Radiant energy radiantenergy
The time integral of irradiance, in joules per square meter (J/m2).
3.4
Spectral energy distribution spectralenergydistribution
Absolute or relative to a source of radiant energy emitted by an object or received, it is a function of wavelength.
3.5
Ultraviolet radiation ultravioletradiation
Electromagnetic radiation wavelength of 280nm ~ 400nm.
3.6
Weatherability weatherresistance
Material exposure under certain climatic conditions (such as sunlight, rain, humidity and temperature, etc.), and its ability to resist performance deteriorated.
Principle 4
Specimen exposure at a predetermined fluorescent UV light source, condensation and/or spray environmental conditions. Sample and comparing the exposure of intact
You can change.
5 Test Equipment
5.1 Test bodies made
UV aging test machine should be corrosion resistant materials, equipped with fluorescent UV lamps, heated water dish, water spray system (optional), sample
Frame and means for controlling and displaying the operating time and temperature. UV aging test machine cross-sectional structure is shown in Figure 1.
Figure 1 UV aging test machine schematic structural cross-sectional
5.2 Fluorescent UV lamps
5.2.1 UVA fluorescent UV lamp. wavelength radiation is less than the percentage of its total radiation of less than 2% of fluorescent UV lamp 300nm in
There 343nm emission peak, 300nm ~ 340nm to simulate daylight. A typical spectral energy distribution in Appendix B.
NOTE. UVA ultraviolet radiation with a wavelength of 315nm ~ 400nm.
5.2.2 UVB fluorescent UV lamp. wavelength radiation is less than the percentage of its total radiation of less than 10% of the fluorescent UV lamp 300nm in
There 313nm emission peak. A typical spectral energy distribution in Appendix B.
NOTE. UVB refers to the wavelength at 280nm ~ 315nm UV radiation.
5.2.3 irradiance exposure to any area that should be at least 70% of the area for this maximum irradiance.
5.2.4 exposure area at any point irradiance were 90% greater than this maximum irradiance area, without the need for periodic position samples
Rotation.
5.3 wet system
Wet system is used to simulate atmospheric environmental conditions condensation or rain, condensation or water spray can be realized.
--- Condensation. dew condensation of water vapor formed by heating the surface of the test specimen, and all samples evenly moist.
--- Water spray. Can water under specified conditions uniformly sprayed on the surface of the test specimen. Sprinklers should be corrosion-resistant material.
5.4 Blackboard thermometer
In the range of 30 ℃ ~ 80 ℃ and a thermometer accurate to ± 1 ℃. Blackboard thermometer in the central region of the exposure to and the sample
In the same test conditions.
5.5 sample holder and sample holder
Sample holder application of corrosion resistant materials, such as aluminum. Both sides tester sample holder, the effective exposure area of the sample holder is generally
900mm × 210mm.
Sample holder (including backplate) use of corrosion resistant materials, such as aluminum. Size specimen holder shall meet the number and size of the sample to be
begging. When the specimen is clamped on the sample holder with the flat surface of the sample tube to be formed in parallel.
6 Sample
The number and size of the sample after exposure to be done by the performance of tests to determine, at least 50mm away from the edge of the fabric sample.
7 Test conditions
7.1 The test shall be carried out at a temperature of 20 ℃ ~ 30 ℃ ambient laboratory conditions.
7.2 According to the characteristics of the sample, end-use environment, select the appropriate Robin test conditions and cycles. Robin Test conditions see
Table 1.
Table 1 Robin Test conditions
Test conditions Lamp Robin test conditions applicable product
Test conditions 1
Test conditions 2
Test conditions 3
UVA type
With at 340nm irradiance of 0.89W/m2 ultraviolet light at a temperature of 60 ℃ blackboard Article
Member under exposure 8h, followed by black panel temperature of 50 ℃ under the conditions of condensing 4h
Shading fabric, etc.
With at 340nm irradiance of 0.89W/m2 ultraviolet light at a temperature of 60 ℃ blackboard Article
Member under exposure 8h, followed by three water spray 0.25h, followed by black panel temperature of 50 ℃ Article
Member condensing 3.75h
Building fabric, etc.
With at 340nm irradiance of 0.89W/m2 ultraviolet light at a temperature of 70 ℃ blackboard Article
Member under exposure 8h, followed by black panel temperature of 50 ℃ under the conditions of condensing 4h
Outside the vehicle
Trim materials
Test conditions 4 UVB type
With at 310nm irradiance of 0.71W/m2 ultraviolet light at a temperature of 60 ℃ blackboard Article
Member under exposure 4h, followed by the board under the conditions of a temperature of 50 ℃ condensate 4h
Weatherability requirements
Higher product
Note. Unless otherwise stated, the general use of UVA ultraviolet fluorescent lamp.
8 Test procedure
8.1 The sample is mounted on a sample holder, and the sample was placed in a folder tester sample holder. Be sure to use the sample surface (front) face
Light, and to ensure that the sample surface smooth.
For samples of yarn. yarn wound around a length of at least 150mm on the sample holder, direct exposure to UV light in the yarn can be used to
Their fracture strength. You can test single yarn or yarns. When testing a plurality of yarn when winding the yarn on the sample holder should be closely aligned, the width
To 25mm. The number of yarns of yarn root number and exposure of the sample to retain the sample should be the same.
8.2 When the sample rack not filled with a blank sample holder to fill.
8.3 Depending on the product or use the agreement to select test conditions of Table 1, adjusted test equipment, to achieve the required test conditions to start the test.
The test shall be maintained continuously.
8.4 During the test specimen to make a uniform acceptance UV irradiation and temperature and humidity. Regional exposure at any point in this area between irradiance
Time domain maximum irradiance of between 70% to 90%, the need for the position of the specimen will be rotated periodically to ensure that the sample received the same radiation
energy. As shown in Figure 2, the first two samples rightmost folder to the leftmost exposure area, and then turn the other sample holder to the right.
2 a schematic view of a sample location map rotation
9 Performance Measurement
9.1 Performance Measurement ago, if a sample is removed from the testing machine is wet, it can be allowed to dry at room temperature.
9.2 Determination of the sample after exposure and as a powerful method in accordance with the relevant standards.
9.3 in line with GB/T 250 - Gray assess color change after exposure of the sample.
9.4 Other performance changes according to the agreement, the sample measured and compared before and after exposure to both supply and demand or need, such as the appearance of change.
10 results
10.1 according to formula (1) to calculate the strength retention, accurate to one decimal place.
R =
F0 ×
100% (1)
Where.
R --- strength retention,%;
F0 --- No exposure specimen strength, in Newtons (N);
F --- the sample after exposure strength, in Newtons (N).
10.2 Other changes in properties such as color.
11 test report
The test report shall include the following.
a) indicate the number of this standard;
b) round robin test conditions;
c) the number of cycles (total test time);
d) a description of the sample;
e) performance measurement methods and test results;
f) any deviation from this standard details.
Appendix A
(Informative)
Applications and Limitations
A.1 This standard is analog in nature UV irradiation and wet conditions caused by the degradation of material properties, not simulate all weather now
Like, such as air pollution, biological attack and salt erosion.
A.2 different experimental conditions may lead to different results. Therefore, the test report to deal with the test conditions described, otherwise test
The results did not reference value.
A.3 of this standard test results obtained for comparison after exposure by the specific test methods for weathering.
A.4 Correlation accelerated laboratory light sources affected by many factors and actual outdoor exposure test between. Laboratory bare light and sun
Differences in spectral distribution. Accelerated testing in the laboratory, often using wave length than the wavelength, in order to obtain a faster aging rate. for
Outdoor exposure, generally considered to shortwave UV radiation cutoff wavelength of 300nm. In less than 300nm UV radiation exposure, may produce
Health degradation reaction, and this reaction does not occur under outdoor conditions. If the source of UV radiation laboratory accelerated tests used included
A wavelength less than the wavelength of the actual conditions of use, then the acceleration test in the degradation mechanism and stability of the material grade may vary significantly.
A.5 If a particular region is known radiation can produce degradation of the test material, as the material does not change the level of stability, it is not necessary to simulate
Full spectrum daylight. However, the ultraviolet or visible spectral laboratory source, tend to have strong in a narrow wavelength range
Emission spectra, may produce some unexpected results. This type of light source may not produce changes in sunlight exposure appears. In just
UV radiation exposure under a light source, may not produce visible light fading caused by sunlight may produce more pronounced than the polymers yellowing
phenomenon.
Appendix B
(Informative)
A typical spectral energy distribution of fluorescent UV lamps
Typical B.1 UVA spectral energy distribution of fluorescent UV lamps Table B.1.
Table B.1 UVA ultraviolet fluorescent lamp typical spectral energy distribution
Spectral range ([lambda] is the wavelength)
nm
Min
Reference solar radiation
Max
λ < 290 - - 0.01
290≤λ≤320 5.9 5.4 9.3
320 < λ≤360 60.9 38.2 65.5
360 < λ≤400 26.5 56.4 32.8
Note. In the wavelength range of 290nm ~ 400nm irradiance of the total irradiance, irradiance data in the table is the total irradiance corresponding percentage bands within
Division ratio.
A typical spectral energy B.2 UVB ultraviolet fluorescent lamp distribution in Table B.2.
Table B.2 UVB ultraviolet fluorescent lamp typical spectral energy distribution
Spectral range ([lambda] is the wavelength)
nm
Min
Reference solar radiation
Max
λ < 290 1.3 - 5.4
290≤λ≤320 47.8 5.4 65.9
320 < λ≤360 26.9 38.2 43.9
360 < λ≤400 1.7 56.4 7.2
Note. In the wavelength range of 290nm ~ 400nm irradiance of the total irradiance, irradiance data in the table is the total irradiance corresponding percentage bands within
Division ratio.