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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We have no amendments or corrections for this standard. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. This practice is intended to induce property changes associated with end-use conditions, including the effects of sunlight, moisture, and heat.
Obtain mutual agreement between all concerned parties for the specic exposure cycle used. Operate the device continuously.
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Accelerated Weathering (QUV) ASTM G154, ASTM D4329, ASTM D4587, ISO 4892
All concerned parties must agree on the control material used. This unexposed surface must not be used as part of the test area.
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. NOTE 7—For some materials, changes may continue after the specimen has been removed from the exposure apparatus. The values given in brackets are for information only. 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.
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Hemispherical on 37 Degree Tilted Surface 2.
Signicant factors include regulation of line voltage, temperature atsm the room in which the device operates, temperature control, and condition and age of the lamp. Assurance Testing Inspection Certification. Signicance and Use 4. 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.
For instance, if two specimens are stacked vertically in each holder, then the top and bottom specimens should switch places halfway through the test.
Accelerated Weathering (QUV) ASTM G, ASTM D, ASTM D, ISO
For measurements 8 Fischer, R. An exposure time that produces a signicant change in one type of material cannot be assumed to be applicable to other types of materials.
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 f4329-05. Standards can be obtained from appropriate standard authorities.
This practice also covers the preparation of test specimens, the test conditions best suited for plastics, and the evaluation of test results. The standardized time period needs to consider conditioning prior to testing. If the document is revised or amended, you will be notified by email. Need more than one copy? If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.
It is recommended that deionized water be used for water used to produce condensation. 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.
Accelerated weathering simulates damaging effects of long term outdoor exposure of materials and coatings. 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. Proceed to Checkout Continue Shopping. Send us a request Wilton UK: All concerned parties must agree on the specic control material used. It is recommended that at least three replicates of each material be exposed to allow for statistical evaluation of results.
ASTM D-4329-05 QUV
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. 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. Warning— Variation in results 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. Need help or have a question? 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. A QUV test chamber uses fluorescent lamps to provide a radiation spectrum centered in the ultraviolet wavelengths. You may delete a document from your Alert Profile at any time. Testing Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards.
A superscript epsilon e indicates an editorial change since the last revision or reapproval.
ASTM D – Standard Practice for Fluorescent UV Exposure of Plastics
When specimens are removed from the exposure apparatus for 24 h or more and then returned for additional exposure, report the elapsed asfm as noted in accordance with Section 9. 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.
Control of ambient temperature is particularly critical when one apparatus is stacked above another, d432-05 the heat generated from the lower unit can interfere with the operation of the units above. All specimens shall be exposed simultaneously in the same device.