Standard Practice for Performing Outdoor Accelerated Weathering Tests of Plastics Using Concentrated Sunlight

SCOPE
1.1 This practice covers the use of Fresnel-reflecting concentrators that use the sun as a source of ultraviolet (UV) and longer-wavelength radiation. Such devices are used in the outdoor-accelerated-exposure testing of plastics.
1.2 This practice provides a procedure for performing outdoor-accelerated-exposure testing of plastics using a Fresnel-reflector outdoor-accelerated weathering test machine. The apparatus is described herein and in Practice G 90 more completely.
1.3 This practice is applicable to a range of plastic materials including, but not limited to, plastic films, sheets, laminates, and extruded and molded products in a variety of shapes and sizes, as specified in .
1.4 This practice describes test conditions that attempt to simulate plastics exposures in desert and subtropical climates. Specimen preparation, property testing procedures, and the evaluation of results are covered in existing test methods or specifications for specific materials.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. 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. Specific precautionary statements are given in Section 7.
Note 1—This standard and ISO 877.2-1991, Method C, are technically equivalent.

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Publication Date
09-Dec-2002
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ASTM D4364-02 - Standard Practice for Performing Outdoor Accelerated Weathering Tests of Plastics Using Concentrated Sunlight
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D 4364 – 02
Standard Practice for
Performing Outdoor Accelerated Weathering Tests of
1
Plastics Using Concentrated Sunlight
This standard is issued under the fixed designation D 4364; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope D 1600 Terminology for Abbreviated Terms Relating to
Plastics
1.1 This practice covers the use of Fresnel-reflecting con-
3
D 1898 Practice for Sampling of Plastics
centrators that use the sun as a source of ultraviolet (UV) and
D 4141 PracticeforConductingAcceleratedOutdoorExpo-
longer-wavelength radiation. Such devices are used in the
sure Tests of Coatings
outdoor-accelerated-exposure testing of plastics.
D 4517 Test Method for Low-Level Total Silica in High-
1.2 This practice provides a procedure for performing
Purity Water by Flameless Atomic Absorption Spectros-
outdoor-accelerated-exposure testing of plastics using a
copy
Fresnel-reflector outdoor-accelerated weathering test machine.
E 772 Terminology Relating to Solar Energy Conversion
The apparatus is described herein and in Practice G 90 more
E 824 MethodforTransferofCalibrationfromReferenceto
completely.
Field Pyranometers
1.3 This practice is applicable to a range of plastic materials
G 7 Practice for Atmospheric Environmental Exposure
including, but not limited to, plastic films, sheets, laminates,
Testing of Nonmetallic Materials
and extruded and molded products in a variety of shapes and
G 24 Practice for Conducting Natural Light Exposures Un-
sizes, as specified in 8.2 and 8.3.
der Glass
1.4 This practice describes test conditions that attempt to
G 90 Practice for Performing Accelerated Outdoor Weath-
simulate plastics exposures in desert and subtropical climates.
ering of Nonmetallic Materials Using Concentrated Natu-
Specimen preparation, property testing procedures, and the
ral Sunlight
evaluation of results are covered in existing test methods or
G 113 Terminology Relating to Natural and Artificial
specifications for specific materials.
Weathering Tests of Nonmetallic Materials
1.5 This standard does not purport to address all of the
4
2.2 ISO Standard:
safety concerns, if any, associated with its use. It is the
ISO 877.2-1991, Method C, Methods of Exposure to Direct
responsibility of the user of this standard to establish appro-
Weathering, to Weathering Using Glass-Filtered Daylight,
priate safety and health practices and determine the applica-
and to Intensified Weathering Using Fresnel Mirrors
bility of regulatory limitations prior to use. Specific precau-
tionary statements are given in Section 7.
3. Terminology
NOTE 1—This standard and ISO 877.2-1991, Method C, are technically
3.1 Definitions—For definitions of technical terms pertain-
equivalent.
ing to plastics used in this practice, see Terminologies D 883,
D 1600, G 113, and E 772.
2. Referenced Documents
2
2.1 ASTM Standards:
4. Significance and Use
D 859 Test Method for Silica in Water
4.1 This practice involves the concentration of sunlight by a
D 883 Terminology Relating to Plastics
system of plane mirrors, arranged to simulate a parabolic
D 1293 Test Methods for pH of Water
trough focused on an air-cooled target board on which the test
D 1435 Practice for Outdoor Weathering of Plastics
specimens are mounted. Exposure methods with and without
water spray that are commonly used for this method are
described in Table 1. Other exposure cycles not listed in Table
1
1 can be used, upon consensual agreement between interested
ThispracticeisunderthejurisdictionofASTMCommitteeD20onPlasticsand
is the direct responsibility of Subcommittee D20.50 on Durability of Plastics. parties.
Current edition approved December 10, 2002. Published February 2003. Origi-
nally approved in 1984. Last previous edition approved in 1994 as D 4364 – 94.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Withdrawn.
4
Standards volume information, refer to the standard’s Document Summary page on Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 4th Floor, New York, NY 10036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D4364–02
TABLE 1 Fresnel-Reflector Test Machine Standard Spray Cycles
Daytime Nighttime
Cycle
Spray Duration Dry-Time Duration Cycles, h Spray Duration Dry-Time Duration Cycles, h
water is sprayed on the test specimens at:
1 8 min 52 min 1 8 min 172 min 9:00 p.m.
12:00 midnig
...

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