D Practice for Outdoor Weathering of Plastics3 4 Discontinued; see Annual Book of ASTM Standards, Vol 5 Annual Book of. astm d 塑料的室外风化 – Designation: D – 99 Standard Practice for Outdoor Weathering of Pl. Find the most up-to-date version of ASTM D at Engineering
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Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Current edition approved Nov. These are dependent on the ASTM test methods for the speci?
It is convenient to group specimens to be removed from exposure at the same time in one holder. This procedure will vary with materials, but it must be uniform s1435 a series of tests on one material to provide comparative results.
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, are entirely their own responsibility.
A superscript epsilon e indicates an editorial change since the last revision or reapproval. It is intended for use with?
ASTM D – 94 Standard Practice for Outdoor Weathering of Plastics
You can download and open this file to your own computer but Asm prevents opening this file on another computer, including a networked server. Fasteners used to attach specimens to the test rack shall provide for secure attachment but allow specimens to expand or contract with thermal changes, moisture absorption or desorption, or plasticizer loss.
Aluminum extruded shapes have been found to asstm suitable. Seasonal effects are averaged in exposures of several years. It cannot be assumed, therefore, that results from one exposure in a single location will be useful for determining relative durability in a different location.
The actual yearly values may vary widely from Table 1. This standard has been approved for use by agencies of the Department of Defense. An inherent limitation in solar-radiation measurements is that they do not re? The values given in parentheses are for information only. They may be specimens suited to the means of evaluating the effects of weathering on a speci?
Specimen holders should be used to support the many sizes of specimens involved in this testing. Preferably, mark both specimen and specimen holder on the side not exposed to weather, as advanced weathering can obscure even deeply scribed marks. The insulators provide inert mounting while the slotted plate permits free circulation of air behind the specimen.
Table 1 shows typical UV radiant exposures for 12 months in subtropical and desert climates. The exposure aperture of each frame shall be of sufficient size to expose the entire test area of each specimen when sufficient specimens are contained.
ASTM D1435 – 13
NOTE 7—The same exposure stage by whichever method is used will not necessarily give the same changes in properties of the test specimen at different exposure sites. If the document is revised or amended, you will be notified by email.
Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. A number in parentheses indicates the year of last reapproval. Note 2 — This standard and ISO Already Subscribed to this document.
The exposure stages must be regarded as providing only a general indication of the degree of exposure, and the results should always be considered in terms of characteristics of the atsm site as well. Please first verify your email before subscribing to alerts. NOTE 6—Sand as a ground cover may be desirable where the abrasive effects of exposure to wind-blown sand is a part of the desired exposure.
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. Precision and Bias zstm Several years of repeat exposures are needed to get an average test result for a given location.
Your Alert Profile lists the documents that will be monitored. 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. The relative durability of plastics in outdoor use can be very different depending on the location of the exposure because of differences in ultraviolet UV radiation, time of wetness, temperature, pollutants, and other factors.
All materials of an unknown end use application will normally be run in an 5.
Originally published as D — 56 T. The results of tests conducted for less than twelve months will depend on the particular season of the year in which they begin.
It is intended for use with finished articles of commerce as well as with all sizes and shapes of test specimens. Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards. If you feel that e1435 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 shall always be used in relation to an end-use system rather than as a asm mounting method. They shall be covered with inert wrapping to exclude light exposure during the exposure period.
Note 1 — See Practice G24 for aging under glass. As the voice of the U. The relative durability of plastics in outdoor use can be very different depending on the location asym the exposure because of differences in ultraviolet UV radiation, time of wetness, temperature, pollutants, and other factors.
NOTE x1435 results for exposure stages of less than one year will depend on the season of the year in which the exposure was made. Climatological variations within these areas may include those represented by desert, seashore salt airindustrial locations, tropical, and subtropical regions, plus areas exhibiting a wide range in solar radiant energy.