Standard Practice for Performing Accelerated Outdoor Weathering of Pressure-Sensitive Tapes Using Concentrated Natural Sunlight

SIGNIFICANCE AND USE
This practice provides a means of qualitative assessments of outdoor weathering effects on pressure-sensitive tapes. The resistance of tapes to outdoor weathering is determined relative to the resistance of a control tape with known stability.
If tests described in this practice produce the same type of degradation as found in real-time exposures of the same materials, it is possible to use the results from these short-term tests to determine the quantitative effects of natural weathering.
The timing of exposure testing covering both outdoor conventional and outdoor accelerated exposure of this practice, using levels of ultraviolet solar radiation exposure (MJ/m2) of UV (295 to 385 nm) is an improvement in the timing of exposure testing. Testing specific levels of solar radiant exposure (MJ/m2) may be used to establish relative equivalent exposure, but the use of (MJ/m2 of UV (295 to 385 nm)) is the preferred method.4 ,5 ,6  
The radiant exposure (308 or 616 MJ/m2) suggested in this practice approximates one and two years, respectively, of exposure in the Southwest and Florida. Since all materials “weather” at different rates in different environments, results obtained using this practice should not be represented as equivalent to natural weathering until the degree of quantitative correlation has been established for the material tested in the environment of its use.
Note 1—The ultraviolet content of natural sunshine is time-of-year dependent, both qualitatively and quantitatively. Thus, wintertime testing requires longer exposure periods on the Flesnel-reflector test machines described to achieve equal ultraviolet energy deposition and a quantitative equal level of degradation concomitant with summertime testing.
SCOPE
1.1 This practice covers one procedure for the exposure of pressure-sensitive tapes to an accelerated outdoor weathering environment.
1.2 This practice describes sample preparation and an accelerated outdoor environment to which it shall be exposed. It does not specify what observations or tests are to be performed on the material following exposure.
1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
1.4 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.

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Status
Historical
Publication Date
30-Sep-2005
Technical Committee
Drafting Committee
Current Stage
Ref Project

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ASTM D5105-05 - Standard Practice for Performing Accelerated Outdoor Weathering of Pressure-Sensitive Tapes Using Concentrated Natural 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:D5105–05
Standard Practice for
Performing Accelerated Outdoor Weathering of Pressure-
1
Sensitive Tapes Using Concentrated Natural Sunlight
This standard is issued under the fixed designation D5105; 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 (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope Lenses and Reflectors of Motor Vehicle Lighting
4
Devices—Recommended Practice
1.1 This practice covers one procedure for the exposure of
pressure-sensitive tapes to an accelerated outdoor weathering
3. Summary of Practice
environment.
3.1 Thepressure-sensitivetapesareexposedtoconcentrated
1.2 This practice describes sample preparation and an ac-
solar radiation in accordance with the conditions provided by
celerated outdoor environment to which it shall be exposed. It
the apparatus described in Practice G90, using spray Cycle 3.
does not specify what observations or tests are to be performed
Following this exposure, the specimen is ready for any
on the material following exposure.
prescribed examination of appearance and physical character-
1.3 The values stated in inch-pound units are to be regarded
istics by other standards as determined by the applicable
as the standard. The values given in parentheses are for
material specification or other documents.
information only.
1.4 This standard does not purport to address all of the
4. Significance and Use
safety concerns, if any, associated with its use. It is the
4.1 This practice provides a means of qualitative assess-
responsibility of the user of this standard to establish appro-
ments of outdoor weathering effects on pressure-sensitive
priate safety and health practices and determine the applica-
tapes. The resistance of tapes to outdoor weathering is deter-
bility of regulatory limitations prior to use.
mined relative to the resistance of a control tape with known
stability.
2. Referenced Documents
2 4.2 If tests described in this practice produce the same type
2.1 ASTM Standards:
of degradation as found in real-time exposures of the same
D3715/D3715M Practice for Quality Assurance of
materials, it is possible to use the results from these short-term
Pressure-Sensitive Tapes
teststodeterminethequantitativeeffectsofnaturalweathering.
G90 Practice for PerformingAccelerated Outdoor Weather-
4.3 The timing of exposure testing covering both outdoor
ing of Nonmetallic Materials Using Concentrated Natural
conventional and outdoor accelerated exposure of this practice,
Sunlight
2
using levels of ultraviolet solar radiation exposure (MJ/m)of
2.2 Federal Specifications:
UV (295 to 385 nm) is an improvement in the timing of
QQ-A-250/5 Aluminum Alloy Alclad 2024, Plate and
3 exposure testing. Testing specific levels of solar radiant expo-
Sheet
2
sure (MJ/m ) may be used to establish relative equivalent
2.3 SAE Document:
2
exposure, but the use of (MJ/m of UV (295 to 385 nm)) is the
SAE J576 Plastic Materials for Use in Optical Parts Such as
, ,
4 5 6
preferred method.
2
4.4 The radiant exposure (308 or 616 MJ/m ) suggested in
this practice approximates one and two years, respectively, of
1
This practice is under the jurisdiction ofASTM Committee D10 on Packaging
and is the direct responsibility of Subcommittee D10.14 on Tapes and Labels.
4
Current edition approved Oct. 1, 2005. Published October 2005. Originally Available from the Society ofAutomotive Engineers, 400 Commonwealth Dr.,
approved in 1990. Last previous edition approved in 1999 as D5105 – 94 (1999). Warrendale, PA 15096.
5
DOI: 10.1520/D5105-05. G. A. Zerlaut, M. W. Rupp, and T. E. Anderson, DEST Laboratories, Inc.,
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Phoenix, AZ, “Ultraviolet Radiation Timing Technique of Outdoor Weathering of
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Materials,” SAE Technical Paper Series #850348 presented at the International
Standards volume information, refer to the standard’s Document Summary page on CongressandExposition,Detroit,MI,Feb.25–March1,1985.AvailablefromSAE.
6
the ASTM website. Bauer, D. R., Paputa Peck, M. C., and Carter III, R. O.,“ Evaluation of
3
AvailablefromStandardizationDocumentsOrderDesk,Bldg.4SectionD,700 Accelerated Spectroscopy,” Journal of Coatings Technology, Vol 59, No. 755, pp
Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS. 103–109.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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