ASTM D4329 PDF
February 6, 2021 | by admin
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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For instance, if two specimens are stacked vertically in each holder, then the wstm and bottom specimens should switch places halfway through the test. Obtain mutual agreement between all concerned parties for the specic exposure cycle used.
Hemispherical on 37 Degree Tilted Surface 2. Do not place the apparatus near a heat source such as an oven. The exposure used in this practice is not intended to simulate the deterioration caused by localized weather phenomena, such as, atmospheric d3429, biological attack, and saltwater exposure.
Measure ambient temperature at a maximum distance of mm [6 in. Do not use arbitrary acceleration factors relating time in an exposure conducted in accordance with this practice and time in an outdoor environment because they can give erroneous information. Assurance Enabling satm to identify and mitigate the intrinsic risk in your operations, supply chains and business processes.
Accelerated Weathering (QUV) ASTM G, ASTM D, ASTM D, ISO
Conduct these round robins in astn with Practice E or Practice D and include a statistically representative sample of all laboratories or organizations who would normally conduct the exposure and property measurement. A superscript epsilon e indicates an editorial change since the last revision or reapproval.
ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this x4329. Instrumental measurements are recommended whenever possible. 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.
Ketola and Douglas Grossman, eds. The exposure used in this practice is not intended to simulate the deterioration caused by localized weather phenomena, such as, atmospheric pollution, biological attack, and saltwater exposure.
Send us a request Wilton UK: Therefore, no reference to the use of this practice should be made unless accompanied by a report asym in accordance with Section 8 that describes the wstm 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.
All concerned parties must agree on the specic control material used.
ASTM D – 05 Standard Practice for Fluorescent UV Exposure of Plastics
Current edition approved July 15, Precision and Bias Inspection Validating the specifications, value and safety of your raw materials, products and assets. Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards. If d329 specimens are stacked vertically, then the specimens should be repositioned vertically three times during the test. 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.
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. This practice also covers the preparation of test specimens, the test conditions best suited for plastics, and the evaluation of test results.
Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Operate the device continuously. The standard sample holders can hold one sample 3 x 12 inches 75 x mm or two samples 3 x 6 inches 75 x mm. Periods of Exposure and Evaluation of Zstm Results 8. Signicant factors include regulation of line voltage, temperature of the room in which the device operates, temperature control, and condition and age of the lamp. Send us a request Need help or have a question?
It is recommended that deionized water be used for water used to produce condensation. Last previous edition ast in as D – Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes.
The values given in parentheses are for information only. NOTE 6—An example of a statistical analysis using multiple-laboratory and exterior exposures to calculate an acceleration factor is described by Simms.
This method is preferred over evaluating materials aastm an arbitrary exposure time or radiant exposure. Accelerated weathering provides exposed samples for comparison to unexposed control samples.
Hemispherical on 37 Tilted Surface. Control of ambient temperature is particularly critical when one apparatus is stacked above another, because the heat generated from the lower unit can interfere with the operation of the units above.
This unexposed surface must not be used as part of the test area.