The Test Protocol that was followed is an adaptation of ASTM D where 1E 1E Buy ASTM D PRACTICE FOR FLUORESCENT UV EXPOSURE OF PLASTICS from SAI Global. ASTM D Standard Practice for Fluorescent UV Exposure of Plastics. This practice covers specific procedures and test conditions that are applicable.
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A QUV test chamber uses fluorescent lamps to provide a radiation spectrum centered in the ultraviolet wavelengths.
Parts asym be accommodated depending on size. Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes. 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.
Accelerated weathering simulates damaging effects of long term outdoor exposure of materials and coatings. Current edition approved July xstm, Assurance Testing Inspection Certification. Follow the purity requirements in Practice G for water sprayed on specimen surfaces.
Where practical, it is recommended that specimens be sized to t specimen holders and racks supplied with the exposure apparatus. You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server.
Instrumental measurements are recommended whenever possible. Whether your business is local or global, we can ensure your products meet quality, health, environmental, safety, and social accountability standards for virtually any market around the world.
Accelerated Weathering (QUV) ASTM G154, ASTM D4329, ASTM D4587, ISO 4892
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. The standardized time period needs to consider conditioning prior to testing. 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.
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. Do f4329-05 place the apparatus near a heat source such as an oven. All concerned parties must agree on the specic control material used. We have no amendments or corrections for this standard.
Signicance and Use 4. 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. Add to Alert PDF. Often several exposure times such as, and hours also will be compared to each other.
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Proceed to Checkout Continue Shopping. Measurements visual or instrumental should be made within a astk time period or as agreed upon between the interested parties.
ASTM D – Standard Practice for Fluorescent UV Exposure of Plastics
Subscription pricing is determined by: Warning— Variation in results may be expected when operating conditions are varied atm the accepted limits of this practice. The values given in brackets are for information only.
It is recommended that deionized water be used for water used to produce condensation. Originally approved in No direct correlation can be made between accelerated weathering duration astj actual outdoor exposure duration.
Accelerated Weathering (QUV) ASTM G, ASTM D, ASTM D, ISO
NOTE 2—Additional information on sources awtm variability and on strategies for addressing variability in the design, execution, and data analysis of laboratory-accelerated exposure tests is found in Guide G 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. The standard sample holders can hold one sample 3 x 12 inches 75 x mm or two samples atm x 6 inches 75 x mm.
Periods of Exposure and Evaluation of Test Results 8. Calculate retention of characteristic property in accordance with Practice D when it is reported.