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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This practice is intended to induce property changes associated with end-use conditions, including the effects of sunlight, moisture, and heat.
Assurance Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes. Send us a request Wilton UK: 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. 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.
Please first verify your email before subscribing to alerts. NOTE 7—For some materials, changes may continue after the specimen has been removed from the exposure apparatus. This unexposed surface must not be used as part of the test area. The values given in brackets are for information only.
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. These cycles would be continued for extended periods of time – up to thousands of hours – simulating even longer periods of time in asrm real world.
Often several exposure times such as, and hours also will be compared to each other. This method is preferred over evaluating materials after an arbitrary exposure time or radiant exposure.
It is recommended that at least three replicates of each material be exposed to allow for statistical evaluation of results. 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. 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.
Hemispherical on 37 Degree Tilted Surface 2.
Please first log in with a verified email before subscribing to alerts. If the document is revised or amended, you will be notified by email. A superscript epsilon e indicates an editorial change since the last revision or reapproval. As the voice of the U. Measure ambient temperature at a maximum distance of mm [6 in.
ASTM D QUV | Burch
Attach porous specimens to a solid backing such as aluminum that can act as a vapor barrier. An exposure time that produces a signicant change in one type of material cannot be assumed to be applicable to other types of materials. Typically, flat plaques or disks are used for accelerated weathering studies.
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.
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. If four specimens are stacked vertically, then the specimens should be repositioned vertically three times during the test. Current edition approved July 15, Proceed to Checkout Continue Shopping.
NOTE 6—An example of a statistical analysis using multiple-laboratory and exterior exposures to calculate an acceleration factor is described by Simms.
ASTM D-4329-05 QUV
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 axtm is found in Guide G 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.
Parts may be accommodated depending on size. Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards. Where practical, it is recommended that specimens be sized to t specimen holders and racks supplied with the exposure apparatus.
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Certification Formally confirming that your products and services meet d4329-5 trusted external and internal standards. All specimens shall be exposed simultaneously in the same device. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Last previous edition approved in as D – Follow the purity requirements in Practice G for water sprayed on specimen surfaces.
Testing Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards.