This standard specifies the test method for determining the yellowing resistance of light-colored and white products such as upper materials and base materials for footwear to similar sunlight and ultraviolet light. This standard specifies two test methods, Method A and Method B. Method B is not suitable for arbitration and precision scientific research and development work. This standard is applicable to the testing of white and light-colored upper materials and base materials for footwear. HG/T 3689-2001 Test method for yellowing resistance of footwear HG/T3689-2001 Standard download decompression password: www.bzxz.net

ICS61.060
Chemical Industry Standard of the People's Republic of China
Sports shoes, rain boots (shoes)
(2001)
Published on 2002-01-24
Implementation on 2002-07-01
Published by the State Economic and Trade Commission
Rate No.: 10149-2002
HG/T3689-2001
This standard is formulated based on the test method of ASTM D14%-1S5& rubber cavity aging radiation caused by light-colored surface discoloration phenomenon. The differences between this standard and ASTM-D1148-1595 are as follows: the scope of application is expanded, and the test device with ultraviolet lamp as the light source is added. The gray sample is used for discoloration according to B2501395. The format of standard writing is quite different. This standard is not proposed by the Policy and Regulations Department of the State Administration of Chemical Industry, but is issued by the National Technical Committee for Standardization of Adhesive Products and the Technical Committee for Shoes. The units of this standard are: General Group Corporation, Shanghai Fangxiao Research Institute, and Shanghai Yuan Adhesive Industry Co., Ltd. The main drafters of this standard are: Huang Zhaohui, Xiao Feng, Jiu Xianli, and Xue Xiaoning. 25 1 Scope Chemical Industry Standard of the People's Republic of China Test method for yellowing resistance of footwear Test method or dlscoloratlon for HG/T36B9--2001
International standard specifies the test of yellowing resistance of industrial shaped materials, base materials, and concave and convex products to similar sunlight and outdoor light.
This standard specifies the test method A and method B. Method B is suitable for design and research and development of fine materials. This standard is also applicable to the testing of convex and concave materials and materials. 2 Referenced standards
The provisions contained in the following standards are constituted by reference in this standard The versions shown are valid at the time of publication of this standard. All standards are subject to change. Consultants using this standard should explore the possibility of using the latest version of the following standards. GB2501995 Color Sample Card for Assessing Color Change
3 Principle
3.1 Method A Sunlight Method
Colored or colored products are prone to color change and yellowing when exposed to natural sunlight for a long time. The sun and heating control device are used to simulate the natural environment. During the observation time, the sample is observed in the cage. 3.2 Method A: To determine the color change of the sample and thus determine the material's ability to resist yellowing under sunlight and UV radiation. 3.2 Method B: To determine the color change of a white or white product under UV radiation for a long time. The sample must be irradiated and the color change of the sample must be observed within a specified period of time to determine the degree of color change of the sample and thus determine the material's ability to resist yellowing under UV radiation. 3.3 Comparability: Are Method A and Method H different? There is no comparability between the two. 4.1.1 Test chamber
A light bulb is installed in the test chamber, the light it emits is similar to dry sunlight, the temperature in the chamber can be controlled within a certain range, and the temperature is controlled within the range of ±2°C. 4.1.2 Light source wwW.bzxz.Net
A 300W bulb with a voltage of (220±10)V is selected. The ultraviolet light filter of the lamp is 280.~4MnL and has visible light. The intensity of the ultraviolet light of the bulb is 25 ± 0.4) W/m. The bulb must be replaced after every 1000 hours of use. 4.1.3 Sample rack
State Economic and Trade Commission 2002-01-2 Approved 2002-07-01 Implementation
HG/T36892001
The sample rack is composed of a tray and a tray support rod, and can reach the height of the sample. A female turntable is installed at the bottom of the sample rack to drive the tray to rotate to ensure that the sample is evenly irradiated. The rotation speed of the tray is (4-1) 1/min. 4.2K method
4.2.1 Test chamber
The test chamber is equipped with an external light tube, and the temperature in the test chamber is room temperature. 4.2.2 Light source
Two 15W ultraviolet lamps are used, with a wavelength of 280~-430W. The lamps must be replaced after every 500 hours of use. 4.2.3 The sample rack is composed of a tray and a tray support frame, and can be of different heights. 4.3 Light-shielding sheet
Not specified: All selected light-shielding sheets shall have a light transmittance of 0. 4.4 Colorimetric card
Complies with 2301995
The colorimetric card shall be replaced at least once every 12 months
4.5 Standard image light for color matching lamp
Results are listed, and the sample shall be judged under the same light source. 5 Sample preparation
5.1 Test shape: Use a new knife to cut a square with a size of (62+2) mm×(12·2) mm. The thickness of the test piece shall not exceed (5U2) mm
5.2 Special test pieces can be determined according to actual conditions or sample shape specifications. 5.3 The number of samples shall be determined according to the daily test items. The number of valid samples for each test item shall not be less than: pieces. 6 Test Cases
6.1 Method A
6.1.1 The temperature in the test chamber is specified to be (5012)°C. 6.1.2 The surface of the sample is parallel to the surface of the bulb, and the distance is [250±2mm, 5.2°C
The surface of the sample is parallel to the bottom surface of the bulb, and the distance is (250±)1m. 7 Test Steps
7.1, 1 Sample Installation
Use a light-repelling sheet to test the first two pins 20mm away: Place the sample on the tray: Position it in the area between two concentric circles with diameters of 75mm and 300m: The radiation blocking side of the sample faces the light source. 7.1.2 Irradiation test
Connect the tray to the test chamber and turn on the switch. The tray is loaded at the specified speed and the test piece is exposed to increasing radiation continuously under the light at a humidity of G ± 2 for a specified time, such as 6h, 12h, 18h, 24h, 36h, etc. 7.1.3 End of test
When the specified time arrives, take the test piece from the test chamber and collect the illumination film on the test piece. 7.2B
7.2.1 Installation of specimens
Cover the test piece with a protective film at two meters on each side and place the specimen on the tray with the irradiated surface of the specimen facing the light source and the length of the specimen perpendicular to the length of the lamp.
7.2.2 Irradiation test
HG/T3689—2001
Put the tray into the test box, turn on the automatic switch, and let the test piece be exposed to the external light for a certain time, such as 3h, 6h, 9h.12 h, etc.
7.2.3 End of the test
After the specified time has arrived, suck out the test piece from the test box and place a light-shielding sheet on the test piece. B. Test results
Use a gray sample to directly evaluate the yellowing of the covered part of the test piece under a standard multi-light source color lamp. Ensure that it reaches level 0.5 and select the result with the lowest level as the final result. At the same time, the test method used should be indicated, whether it is method A or method B. 9. Test report
Whether the test report includes the following contents:
, use the name of this standard to collect the code;
b. Test sample name, specification and manufacturer:
C or test method (method A or method R>1
d. Test number and light source protection;
e. Test conditions, exposure time;
". Test results:
g. Test period, test results and others,
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.