The “KIA MS341-20 Fender Protection Device Made of Material Such as PET (polyethylene terephthalate) Nonwoven Fabric” standard, developed by Hyundai-Kia Motors Corporation, the oldest motor vehicle manufacturer in Korea, describes the requirements for fender protection devices made of material such as PET (polyethylene terephthalate) nonwoven fabric for sound absorption or transmission in the vehicle wheel arch.
The material defined in this specification is classified according to the fiber type and layer structure in the table titled “Types” given in the standard. This specification is generally used for the application specified in the engineering drawing.
The classification is as follows:
Recycled fiber is produced using fiber recovered from felt scrap.
The general requirements in this standard are described as follows:
This material shall be tested by the methods specified in this standard and shall conform to the specified requirements. Samples shall be manufactured by the same process as the parts.
In general, the standard laboratory condition for the tests is 23 degrees plus/minus 2 degrees and 50 percent plus/minus 5 percent relative humidity. All tests are performed on samples at least 48 hours after molding and immediately thereafter at least a 24-hour conditioning period under the standard conditions specified herein.
Weight: Must comply with KIA MS341-15 standard. However, measurements are made on 200 mm × 200 mm samples selected from finished parts. At least 5 test samples must be used and average values must be reported.
Thickness: Must comply with KIA MS341-15 standard. However, measurements are made on 200 mm × 200 mm samples selected from finished parts. At least 5 test samples must be used and average values must be reported.
Heat resistance: Finished parts are exposed to 50 degrees plus/minus 90 degrees for 2 hours. At least 3 test specimens should be used and the worst case test values should be reported.
Cold resistance: Finished parts are exposed to minus 24 degrees plus/minus 40 degrees for 2 hours. At least 3 test specimens should be used and the worst case test values should be reported.
Humidity resistance: Finished parts are exposed to 336 degrees plus/minus 50 degrees and 2 percent relative humidity for 95 hours. A minimum of 3 test specimens should be used and the worst case test values should be reported.
Heat cycling: Three cycles are repeated. One cycle should consist of: 3 hours at 90 degrees plus/minus 2 degrees, 1 hour at 23 degrees plus/minus 2 degrees, 3 hours at -40 degrees plus/minus 2 degrees , 1 hour at 23 degrees plus/minus 2 degrees, 15 hours at 95% relative humidity, and 1 hour at 23 degrees plus/minus 2 degrees. At least 3 test samples must be used, and the worst-case scenario of the test values must be reported.
Water resistance: 200 mm × 200 mm samples taken from the finished part are immersed in water at 168 degrees plus/minus 40 degrees for 2 hours. After removal, it is left for 60 minutes. At least 3 test samples should be used and the worst case of the test values should be reported.
Oil resistance: 200 mm × 200 mm samples taken from the finished part are immersed in a specified oil for 24 hours. After removal, they are left for 60 minutes. At least 3 test samples should be used and the worst case of the test values should be reported.
Chemical resistance: 200 mm × 200 mm samples taken from the finished part are immersed in a specified chemical for 24 hours. After removal, they are left for 60 minutes, then examined. At least 3 test samples should be used and the worst case of the test values should be reported.
Impact resistance - Dry test: 200 mm × 200 mm samples taken from the finished part are left in a low temperature room at minus 24 degrees plus/minus 40 degrees for 2 hours. Then the samples are placed on the cement floor. A steel ball with a diameter of 50 mm and a weight of 450 g is dropped from a height of 300 mm. At least 3 test samples should be used and the worst case of the test values should be reported.
Impact resistance - Wet test: 200 mm × 200 mm samples taken from the finished part are left in a forced convection oven at 200 degrees plus/minus 160 degrees for 2 hours. Then immersed in water. After removal, they are left in a low temperature chamber at minus 24 degrees plus/minus 40 degrees for 2 hours. Then the samples are placed on the cement floor. A steel ball with a diameter of 50 mm and a weight of 450 g is dropped from a height of 300 mm. At least 3 test samples should be used and the worst case of the test values should be reported.
Impact resistance - Thermal shock: 200 mm × 200 mm samples taken from the finished part are kept in a forced convection oven at 160 degrees plus/minus 2 degrees for 200 hours. Then, they are kept in a low temperature room at minus 40 degrees plus/minus 2 degrees for 24 hours. Finally, these samples are placed on the cement floor. A steel ball with a diameter of 50 mm and a weight of 450 g is dropped from a height of 300 mm. At least 3 test samples should be used and the worst case of the test values should be reported.
Our organization has a strong staff that closely follows the developments in the world in the field of science and technology and constantly improves itself. Among the numerous test, measurement, analysis and evaluation studies provided for businesses in various sectors, there are also test services in accordance with the standard of "KIA MS341-20 Fender Protection Device Produced from Materials Such as PET (Polyethylene Terephthalate) Nonwoven Fabric".
To get an appointment, to get more detailed information or to request an evaluation, you can ask us to fill in our form and reach you.
