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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Precision and Bias 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 Operate the device continuously. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. 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.

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.

Individual reprints single or multiple copies of this standard may be obtained asfm contacting ASTM at the above address or at phonefaxor service astm. A superscript epsilon e indicates adtm editorial change since the last revision or reapproval. Attach porous specimens to a solid backing such as aluminum that can act as a vapor barrier. Often several exposure times such as, and hours also will be compared to each other.

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The values given in brackets are for information only. The standardized time period needs to consider conditioning prior to testing.

ASTM D4329

Accelerated weathering simulates damaging effects of long term outdoor exposure of materials and coatings. Need help or have a question? 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.

Send us a request Wilton UK: Calculate retention of characteristic property in accordance with Practice D when it is reported.

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. Assurance Testing Inspection Certification.

Accelerated Weathering (QUV) ASTM G154, ASTM D4329, ASTM D4587, ISO 4892

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.

An exposure time that produces a signicant change in one type of material cannot be assumed to be applicable to other types of materials. Link to Active This link will always route to the current Active version of the standard.

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. All asfm shall be exposed simultaneously in the same device.

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It is recommended that at least three replicates of each material be exposed to allow for statistical evaluation of results.

Accelerated Weathering (QUV) ASTM G, ASTM D, ASTM D, ISO

Formally confirming that your products and services meet all trusted external and internal standards. 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. 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. Send us a request Need help or have a question?

Assurance Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes. This practice also covers the preparation of test specimens, the test conditions best suited for plastics, and the evaluation of test results. Do not place the apparatus near a heat source such as an oven.

Validating the specifications, value and safety of your raw materials, products and assets. Hemispherical on 37 Tilted Surface.

Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes.

Certification Formally confirming that your products and services meet all trusted external and internal standards.