ASTM D tests for fluorescent UV exposure of plastics. It covers specific procedures and test conditions based on practices ASTM G and ASTM G This standard is issued under the fixed designation D ; the number 1 This practice is under the jurisdiction of ASTM Committee D on Plastics. ASTM D – Designation: D – 05 Standard Practice for Fluorescent UV Exposure of Pla.
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Accelerated Weathering (QUV) ASTM G154, ASTM D4329, ASTM D4587, ISO 4892
However, performance comparisons under the controlled conditions of accelerated weathering can be compared to documented performance of materials and coatings that have experienced extended periods of end use exposure.
Signicance and Use 4. Historical Version asfm – view previous versions of standard.
NOTE 4—This is especially important when mechanical properties are being investigated. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Calculate retention of characteristic property in accordance with Practice D when it is reported. Auditing Consulting Sourcing Training.
It is recommended that at least three replicates of each material be exposed to allow for statistical evaluation of results. Through our network of over 43, people in 1, laboratories and offices in countries, Intertek c4329 quality and safety solutions to a wide range of industries around the world.
The standardized time period aastm to consider conditioning prior to testing. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Link aetm Active This link will always route to the current Active version of the standard.
A number in parentheses indicates the year of last reapproval. Accelerated weathering provides exposed samples for comparison to unexposed control samples. NOTE 2—Additional information on sources of variability and on strategies for addressing variability in the design, execution, and data analysis of laboratory-accelerated exposure tests is found in Guide G Send us a request Need help or have a question?
The acceleration factor is materialdependent and is only valid if it is based on data from a sufficient number of separate exterior and laboratoryaccelerated exposures so that results used to relate times to failure in each exposure can be analyzed using statistical methods.
It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
For instance, if two specimens are stacked vertically in each holder, then the top and bottom specimens should switch places halfway through the test. Therefore, no reference to the use of this practice should be made unless accompanied by a report prepared in accordance with Section 8 that describes the specic operating conditions used. This practice also covers the preparation of test specimens, the test conditions best suited for plastics, and the evaluation of test results.
ASTM D – UV EXPOSURE OF PLASTICS
Operate the device continuously. Validating the specifications, value and safety of your raw materials, products and assets. This method is preferred over evaluating materials after an arbitrary exposure time or radiant exposure. Periods of Exposure and Evaluation of Test Results 8.
NOTE 7—For some materials, changes may continue after the specimen has been removed from the exposure apparatus. Typically, flat plaques or disks are used for accelerated weathering studies. When specimens are removed from the exposure apparatus for 24 h or more and then returned for additional exposure, report the elapsed time as noted in accordance with Section 9. If four specimens are stacked vertically, then the specimens should be repositioned vertically three times during the test.
Instrumental measurements are recommended whenever possible.
Current edition approved July 15, Global Reach Intertek is the industry leader with over 42, people in 1, locations in over countries. Send us a request Wilton UK: Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards. This unexposed surface must not be used as part of the d3429 area. Ast practice is intended to induce property changes associated with end-use conditions, including the effects of ultraviolet solar irradiance, moisture, and heat.
Inspection Validating the specifications, value and safety of your raw materials, products and assets.