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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For measurements 8 Fischer, R. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. All concerned parties must agree on the control material used. This practice is intended to induce property changes associated atsm end-use conditions, including the effects of ultraviolet solar irradiance, moisture, and heat.

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. NOTE 6—An example of a statistical analysis using multiple-laboratory and exterior exposures to calculate an acceleration factor is described by Simms.

Historical Version s – view previous versions of standard. Refer to Practice G for detailed information on the caveats applicable to use of results obtained in accordance with this practice. Attach porous specimens to a solid backing such as aluminum that can act as a vapor barrier. 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 aetm.

The values given in parentheses are for information only. No direct correlation can be made between accelerated weathering duration and actual outdoor exposure duration.

ASTM D – 05 Standard Practice for Fluorescent UV Exposure of Plastics

Current edition approved July 15, Suggested aluminum alloys are, or Standards can be obtained from appropriate standard authorities. Ketola and Douglas Grossman, eds. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.

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Assurance Testing Inspection Certification. Warning— Variation in results may be expected when operating conditions are varied within the accepted limits of this practice. The acceleration factor is materialdependent and is only valid if it is based on data from a sufficient number of separate exterior and d439 exposures so that results used to relate times to failure in each exposure can be analyzed using statistical methods.

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. However, performance comparisons under the controlled conditions of accelerated weathering can be compared to documented performance of materials and coatings that have experienced extended periods of end use exposure. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Often several exposure times such as, and hours also will be compared to each other.

Dd4329 practice also covers the preparation of test specimens, the test conditions best suited for plastics, and the evaluation of test results. Warning— Atsm in wstm may be expected when operating conditions are varied within the accepted limits of this practice.

Typically, flat plaques or disks are used for accelerated weathering studies.

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 d43229 Do astmm 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.

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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.

ASTM D4329

Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Testing Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards. The values given in brackets are for information only. Accelerated weathering provides exposed samples for comparison to unexposed control samples. Periods of Exposure and Evaluation of Test Results 8.

All concerned parties must agree on the specic control material used. This unexposed surface must not be used as part of the test area.

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. Calculate retention of characteristic property in accordance with Practice D when it is reported.

Precision and Bias Need help or have a question? Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards. Assurance Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes. A superscript epsilon e indicates an editorial change since the last revision or reapproval.

Refer to Practice G for detailed information on the caveats applicable to atm of results obtained in accordance with this practice.

Hemispherical on 37 Degree Tilted Surface 2. Operate the device continuously. Parts may be accommodated depending on size. Send us a request Need help or have a question?

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