ASTM D4329 PDF

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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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. 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 specific operating conditions used.

Significant factors include regulation of line voltage, temperature of the room in which the device operates, temperature control, and condition and age of the lamp. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every ve years and if not revised, either reapproved or withdrawn.

ASTM D4329

All specimens shall be exposed simultaneously in the same device. Through our network of over 43, people in 1, laboratories and offices in countries, Intertek provides quality and safety solutions to a wide range of industries around the world. Send us a request Wilton UK: Link to Active This link will always route to the current Active version of the standard. 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.

Refer to Practice G for detailed information on the caveats applicable to use of results obtained in accordance with this practice. It is recommended that deionized water be used for water used to produce condensation. An exposure time that produces a signicant change in one type of material cannot be assumed to be applicable to other types of materials.

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Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Instrumental measurements are recommended whenever possible.

ASTM D | Rycobel

D — 05 Standard Practice for Fluorescent UV Exposure of Plastics1 This standard is issued under the xed designation D ; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. Operate the device continuously.

A superscript epsilon e indicates an editorial change since the last revision or reapproval. If four specimens are stacked vertically, then the specimens should be repositioned vertically three times during the test.

Misleading results may be obtained by this method, since the masked portion of the specimen is still exposed to temperature and humidity cycles that in many cases will affect results. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are asstm provided as part of the standard.

Conduct these round robins in accordance 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. Moisture is provided by forced condensation, and temperature is controlled qstm heaters.

Measure ambient temperature at a maximum distance of mm [6 in. Up to 20 test samples are mounted in the QUV and subjected to a cycle of exposure to intense ultraviolet radiation followed by moisture exposure by condensation. Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes.

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.

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This practice is intended to induce property changes associated with end-use conditions, including the effects of sunlight, moisture, and heat. However, performance comparisons under the controlled conditions of accelerated v4329 can be compared to documented performance of materials and coatings that have experienced extended periods of end use exposure.

Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.

Originally approved in This unexposed surface must not be used as part of the test area. Where practical, it is recommended that specimens be sized to t specimen holders and racks supplied with the exposure apparatus.

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. Need help or have a question? Accelerated weathering provides exposed samples for comparison to unexposed control samples. This practice is intended to induce property changes associated with end-use conditions, including the d43299 of ultraviolet solar irradiance, moisture, and heat.

Standards can be obtained from appropriate standard authorities.

When a single exposure period is used, select a time or radiant exposure that will produce the largest performance differences between the test materials or between the test material and the control material. Measurements visual or instrumental should be made within a standardized time period or as agreed upon between the interested parties.

If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. NOTE 7—For some materials, changes may continue after the specimen has been removed from the exposure apparatus.