SAE J576:2017 pdf free

SAE J576:2017 pdf free.Plastic Material or Materials for Use in Optical Parts Such as Lenses and Reflex Reflectors of Motor Vehicle Lighting Devices
Outdoor exposure tests shall be made on each material or materials (as defined in 3.1 and 3. 1.1) offered for use in optical parts employed in motor vehicle lighting devices. Concentrations of polymer components and additives such as plasticizers,lubricants, colorants, weathering stabilizers, light diffusion additives, and antioxidants in plastic materials and/or coatings may be changed without outdoor exposure testing if: the changes are within the limits of composition represented by higher and lower concentrations of these polymer components and additives have been tested in accordance with 4.3 and found to meet the requirements of Section 5.
After establishing and documenting correlation between accelerated, ASTM D4364-05, and SAE outdoor exposure tests (4.3) for the plastic material or materials and colorant under consideration, accelerated weathering may be used to evaluate minor changes in concentrations of polymer components and additives (4.1) previously found to be acceptable in the outdoor exposure tests. These tests may be used to establish acceptable high and low concentrations of the components and additives pending completion of 3 year weathering tests. These tests will serve as an indication that the plastic material or materials are capable of meeting the performance requirements of Section 5.
The haze of transparent plastic material or materials used for lamp lenses shall not be greater than 30% as measured by ASTM D1 003-00. The haze of transparent plastic material or materials used for reflex reflectors and/or exposed cover lens material or materials used in front of reflex reflectors shall not be greater than 7% as measured by ASTM D1003-00. The haze of plastic material or materials used for forward road ilumination devices, excluding cornering lamps, shall not be greater than 7% as measured by ASTM D1003-00.
In order to test for the presence of a coating, a trace quantity (100 ppm maximum in wet state) of an optical brightener should be added to a coating formulation. This should be checked by ultraviolet inspection against a known coated sample. Additionally, coating suppliers have the option of providing coatings without optical brighteners if they can provide an industry accepted method to detect the coating. SAE J576 pdf free download.