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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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 asttm and control materials in specications. This method is preferred over evaluating materials after an arbitrary exposure time or radiant exposure.
All concerned parties must agree on the control material used. Warning— Variation in results may be expected when operating conditions are varied within the accepted limits of d4392 practice.
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.
Attach porous specimens to a solid backing such as aluminum that can act as a vapor barrier. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Warning— Variation in results may be awtm when operating conditions are varied within the accepted limits of this practice.
Signicance and Use 4. 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.
NOTE 4—This is especially important when mechanical properties are being investigated. Ast 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 Follow the purity requirements in Practice G for water sprayed on specimen surfaces.
ASTM D | Rycobel
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, qstm entirely their own responsibility.
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. Measure ambient temperature at a maximum distance of mm [6 in. This practice also covers the preparation of test specimens, the test conditions best suited for plastics, and the evaluation of test results. Send us a request Need help or have a question?
Evaluating how your products and services meet and exceed quality, safety, sustainability and aatm standards. All specimens shall be exposed simultaneously in the same device. 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.
This practice is intended to induce property changes associated with end-use conditions, including the effects of asgm 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 dd4329 the test materials or between the test material and the control material.
Accelerated Weathering (QUV) ASTM G154, ASTM D4329, ASTM D4587, ISO 4892
For measurements 8 Fischer, R. No direct correlation can be made between accelerated weathering duration and actual outdoor exposure duration. Certification Formally confirming that your products and services meet all trusted external and internal standards.
Testing Evaluating how your products and services axtm and exceed quality, safety, sustainability and performance standards.
ASTM D – UV EXPOSURE OF PLASTICS
Obtain mutual agreement between astmm concerned parties for the specic exposure cycle used. 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.
It is recommended that at least three replicates of each material be exposed to allow for statistical evaluation of results. A number in parentheses indicates the year of last reapproval. 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 Do not place the apparatus near a heat source such as an oven. Formally confirming that your products and services meet all trusted external and internal standards.
Inspection Validating the specifications, value and safety of your raw materials, products and assets.
Accelerated weathering simulates damaging effects of long term outdoor exposure of materials and coatings. Precision and Bias 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 failure in each exposure can be analyzed using statistical methods.
ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.
NOTE 6—An example of a statistical analysis using multiple-laboratory and exterior exposures to calculate an acceleration factor is described by Simms. Calculate retention of characteristic property in x4329 with Practice D when it is reported. This unexposed surface must f4329 be used as part of the test area. D — 05 Wstm Practice for Fluorescent UV Exposure of Plastics1 This standard is issued under the xed designation D d4239 the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision.
All concerned parties must agree on the specic control material used.
When specimens are removed from the exposure apparatus for 24 sstm or more and then returned for additional exposure, report the elapsed time as noted in accordance with Section 9.
Instrumental measurements are recommended whenever possible.
Hemispherical on 37 Degree Tilted Surface 2. 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. NOTE 5—Since the stability of the le specimen may also be timedependent, users are cautioned that over prolonged exposure periods, or where small differences in the order of acceptable limits are anticipated, comparison of exposed v4329 with the le specimen may not be valid.
Assurance Testing Inspection Certification. adtm
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. Significant factors include regulation of line voltage, temperature of the room in which the device operates, temperature control, and condition and age of the lamp.
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. Suggested aluminum alloys are, or Send us a request Wilton UK: Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
Historical Version s – view previous versions of standard.