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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Expose replicates of the test specimen and the control specimen so that statistically signicant performance differences can be determined NOTE 8—Fischer illustrates use of rank comparison between test and control materials in specications.
ASTM D – 05 Standard Practice for Fluorescent UV Exposure of Plastics
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.
A number in parentheses indicates the year d329-05 last reapproval. Please first verify your email before subscribing to alerts. Where practical, it is recommended that specimens be sized to t specimen holders and racks supplied with the exposure apparatus. This standard is not included in any packages. Often several exposure times such as, and hours also will be compared to each other.
A QUV test chamber uses fluorescent lamps to provide a radiation spectrum centered in the ultraviolet wavelengths. Control of ambient temperature is particularly critical when one apparatus is stacked above another, because zstm heat generated from d4329-055 lower unit can interfere with the operation of the units above.
Accelerated Weathering (QUV) ASTM G, ASTM D, ASTM D, ISO
Auditing Consulting D4329-055 Training. NOTE 7—For some materials, changes may continue after the specimen has been removed from the exposure apparatus. Accelerated weathering simulates damaging effects of long term outdoor exposure of materials and coatings.
All concerned parties must agree on the control material used. This practice also aatm the preparation of test specimens, the test conditions best suited for plastics, and the evaluation of test results.
This method is preferred over evaluating materials after an arbitrary exposure time or radiant exposure. As the voice of the U. A superscript epsilon e indicates an editorial change since the last revision or reapproval.
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 aztm.
Please first log in with a verified email before subscribing to alerts. Moisture is provided by forced condensation, and temperature is controlled by heaters. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Your comments will receive careful consideration at a d43329-05 of the responsible technical committee, which you may attend.
You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server. Refer to Practice G for detailed information on the caveats applicable to use of results obtained in accordance with this practice. The acceleration factor is materialdependent and is only valid if it is based on data from a sufficient number asgm separate exterior and laboratoryaccelerated exposures so that results used to relate times to failure in each exposure can be analyzed using statistical methods.
Measurements visual or instrumental should be made within a standardized time period or as agreed upon between the interested parties. The exposure used in this practice d4329-055 not intended to simulate the deterioration caused by localized weather phenomena, such as, atmospheric pollution, biological attack, and saltwater exposure.
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 Need more than one copy?
Accelerated Weathering (QUV) ASTM G154, ASTM D4329, ASTM D4587, ISO 4892
Global Reach Intertek is the industry leader with over 42, people in 1, locations in over countries. Subscription pricing is determined by: Assurance Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes. Current edition approved July 15, NOTE 5—Since the stability of the le specimen may also be timedependent, users are cautioned that over prolonged exposure periods, or where small differences in the order of acceptable limits are anticipated, comparison of exposed specimens with the le specimen may aatm be valid.
Operate the device continuously. Do not place the apparatus near a heat source such as an oven. If four specimens are stacked vertically, then the specimens should be repositioned vertically three times during the test. The standardized time period needs to consider conditioning prior to testing.
Assurance Testing Inspection Certification. These cycles would be continued for extended periods of time – up to thousands of hours – simulating even longer periods of time in the real world. Measure ambient temperature at a maximum distance of mm [6 in. Calculate retention of characteristic property in accordance with Practice D when it is reported.