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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Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Signicance and Use 4. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Asrm approved in All specimens shall be exposed simultaneously in the same device. Unless supplied with a specic backing as an integral part of the test, specimens shall be mounted so that only the minimum specimen area required for support by the holder shall be covered.

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

Parts may be accommodated depending on size. This unexposed surface must not be used as part of the test area. Calculate retention of characteristic property in accordance with Practice D when it is reported.

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

Accelerated weathering simulates damaging effects of long term outdoor exposure of materials and coatings. 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.

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 aastm above. Testing Evaluating how your products and services aastm and exceed quality, safety, sustainability and performance standards.

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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. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every ve years and if not revised, either reapproved or withdrawn.

The standardized time period needs to consider conditioning prior to testing. Signicant factors include regulation of line voltage, temperature of the room in which the device operates, temperature control, and condition and age of the lamp.

Assurance Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes. NOTE 4—This is especially important when mechanical properties are being investigated. It is recommended that deionized water be used for water used to produce condensation. Users of this aetm 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.

Precision and Bias The values given in brackets are for information only.

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

Therefore, no reference to the use of aastm practice should be made unless accompanied by a report prepared in accordance with Section 8 that describes the specific operating conditions used. 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. Validating the specifications, value and safety of your raw materials, products and assets.

The standard sample holders can hold one sample 3 x 12 inches 75 x mm or two samples 3 x 6 inches 75 x mm. If four specimens are stacked vertically, then the specimens s4329 be repositioned vertically three times during the test. 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.

Hemispherical on 37 Tilted Surface.

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d4392 Where practical, it is recommended that specimens be sized to t specimen holders and racks supplied with the exposure apparatus. This practice is intended to induce property changes associated with end-use conditions, including the effects of ultraviolet solar irradiance, moisture, and heat.

Standards can be obtained from appropriate standard authorities. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. For measurements 8 Fischer, R. Warning— Variation in results may be expected when operating conditions are varied within the accepted limits of this practice. This method is preferred over evaluating materials after an arbitrary exposure time or radiant exposure.

This practice also covers the preparation of test specimens, the test conditions best suited for plastics, and the evaluation of test ast. 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.

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

Measure ambient temperature at a maximum distance of mm [6 in. 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 d3429 in each exposure can be analyzed using statistical methods.

Obtain mutual agreement between all concerned parties for the specic exposure cycle used. Often several wstm times such as, and hours also will be compared to each other.

Do not place the apparatus near a heat source such as an oven. Conduct these round robins in accordance with Practice E or Practice D and include a statistically representative sample of all laboratories or organizations who would normally conduct the exposure and property measurement.