1、Designation: D 5105 05Standard Practice forPerforming Accelerated Outdoor Weathering of Pressure-Sensitive Tapes Using Concentrated Natural Sunlight1This standard is issued under the fixed designation D 5105; the number immediately following the designation indicates the year oforiginal adoption or,
2、 in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) 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. Scope1.
3、1 This practice covers one procedure for the exposure ofpressure-sensitive tapes to an accelerated outdoor weatheringenvironment.1.2 This practice describes sample preparation and an ac-celerated outdoor environment to which it shall be exposed. Itdoes not specify what observations or tests are to b
4、e performedon the material following exposure.1.3 The values stated in inch-pound units are to be regardedas the standard. The values given in parentheses are forinformation only.1.4 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is therespon
5、sibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D 3715/D 3715M Practice for Quality Assurance ofPressure-Sensitive TapesG90 Practice for Perf
6、orming Accelerated Outdoor Weath-ering of Nonmetallic Materials Using Concentrated Natu-ral Sunlight2.2 Federal Specifications:QQ-A-250/5 Aluminum Alloy Alclad 2024, Plate andSheet32.3 SAE Document:SAE J576 Plastic Materials for Use in Optical Parts Such asLenses and Reflectors of Motor Vehicle Ligh
7、tingDevicesRecommended Practice43. Summary of Practice3.1 The pressure-sensitive tapes are exposed to concentratedsolar radiation in accordance with the conditions provided bythe apparatus described in Practice G90, using spray Cycle 3.Following this exposure, the specimen is ready for anyprescribed
8、 examination of appearance and physical character-istics by other standards as determined by the applicablematerial specification or other documents.4. Significance and Use4.1 This practice provides a means of qualitative assess-ments of outdoor weathering effects on pressure-sensitivetapes. The res
9、istance of tapes to outdoor weathering is deter-mined relative to the resistance of a control tape with knownstability.4.2 If tests described in this practice produce the same typeof degradation as found in real-time exposures of the samematerials, it is possible to use the results from these short-
10、termtests to determine the quantitative effects of natural weathering.4.3 The timing of exposure testing covering both outdoorconventional and outdoor accelerated exposure of this practice,using levels of ultraviolet solar radiation exposure (MJ/m2)ofUV (295 to 385 nm) is an improvement in the timin
11、g ofexposure testing. Testing specific levels of solar radiant expo-sure (MJ/m2) may be used to establish relative equivalentexposure, but the use of (MJ/m2of UV (295 to 385 nm) is thepreferred method.4,5,64.4 The radiant exposure (308 or 616 MJ/m2) suggested inthis practice approximates one and two
12、 years, respectively, ofexposure in the Southwest and Florida. Since all materials“weather” at different rates in different environments, results1This practice is under the jurisdiction of ASTM Committee D10 on Packagingand is the direct responsibility of Subcommittee D10.14 on Tapes and Labels.Curr
13、ent edition approved Oct. 1, 2005. Published October 2005. Originallyapproved in 1990. Last previous edition approved in 1999 as D 5105 94 (1999).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards
14、 volume information, refer to the standards Document Summary page onthe ASTM website.3Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.4Available from the Society of Automotive Engineers, 400 Commonwealth Dr.,Warrendale
15、, PA 15096.5G. A. Zerlaut, M. W. Rupp, and T. E. Anderson, DEST Laboratories, Inc.,Phoenix, AZ, “Ultraviolet Radiation Timing Technique of Outdoor Weathering ofMaterials,” SAE Technical Paper Series #850348 presented at the InternationalCongress and Exposition, Detroit, MI, Feb. 25March 1, 1985.Avai
16、lable from SAE.6Bauer, D. R., Paputa Peck, M. C., and Carter III, R. O.,“ Evaluation ofAccelerated Spectroscopy,” Journal of Coatings Technology, Vol 59, No. 755, pp103109.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.obtained usin
17、g this practice should not be represented asequivalent to natural weathering until the degree of quantitativecorrelation has been established for the material tested in theenvironment of its use.NOTE 1The ultraviolet content of natural sunshine is time-of-yeardependent, both qualitatively and quanti
18、tatively. Thus, wintertime testingrequires longer exposure periods on the Flesnel-reflector test machinesdescribed to achieve equal ultraviolet energy deposition and a quantitativeequal level of degradation concomitant with summertime testing.5. Apparatus5.1 Exposure Apparatus, conforming to all of
19、the param-eters of Practice G90.5.2 Panels, for mounting specimens, approximately 3 by 5by 0.040 in.5.2.1 The material shall be 2024 Alclad conforming toFederal Specification QQ-A-250/5.5.2.2 A panel or frame of the dimensions required by theexposure apparatus may be used to support the specimen pan
20、elwhen it is more convenient to do so, as long as the light andwater paths are not interrupted or shortened by doing so.5.3 Rubber-Covered Roller, at least as wide as the specimenwith any diameter and rubber hardness.6. Sampling6.1 Sampling shall be in accordance with the requirementsof the subseque
21、nt test standard or applicable material orcommodity specification.6.2 Lacking the previously mentioned documents, samplingshall be in accordance with Practice D 3715/D 3715M.7. Test Specimens7.1 Unless otherwise specified, prepare and expose at leasttwo replicate specimens of each tape to be tested.
22、 The testspecimen dimensions shall be in accordance with any teststandard to be used subsequent to this exposure or theapplicable material or commodity specification.7.2 Lacking the previously mentioned documents, thesample shall consist of two 2 by 3-in. (50 by 75-mm) strips oftape.7.3 Unwind and d
23、iscard at least three, but no more than six,outer wraps of tape from the sample roll before takingspecimens for testing.7.4 Remove specimens from a freely rotating roll at the rateof 20 to 30 in./s (500 to 750 mm/s). Where width or otherfactors causing high adherence to backing make it impossibleto
24、remove the specimens at the prescribed rate, remove at a rateas close to 20 in./s (500 mm/s) as possible.8. Procedure8.1 Apply the specimens as directed by the standard to beused subsequent to this exposure. If there are none, apply oneof the 2 by 3-in. (50 by 75-mm) specimens, centered length-wise,
25、 to the 3 by 5-in. (75 by 125-mm) panel starting at one endusing the rubber-covered roller (see 5.3), holding the specimenso that the roller causes first contact of the specimen with thepanel. Apply the second 2 by 3-in. specimen as described,starting at the opposite end of the panel. The end result
26、 shouldbe a continuous 2-in. (50-mm) wide specimen covering thepanel from one end to the other with a 1-in. (25-mm) overlapat the center of the panel.8.2 The backside or nonadhesive side of the specimen isgenerally exposed to the sunlight. Any deviation from thiswould be expressed by the test standa
27、rd or commodity speci-fication. If using specimens prepared as described in thispractice, mount the specimens in the exposure rack, oriented sothat the overlap edge of the tape is pointed away from the flowof cooling air.8.3 Expose the panels, with specimens applied, according tospray Cycle 3 of Pra
28、ctice G90for the amount of solar energy,expressed in Megajoules per square metre (MJ/m2), specifiedin the subsequent test standard or commodity specification.Unless otherwise specified, expose to 616 MJ/m2total solarultraviolet energy (295 to 385-nm wavelength).8.4 Follow the instructions of the sub
29、sequent test standardor commodity specification relative to observations or physicaltests, or both, to be performed on the specimens followingexposure. Determine the average of the result for physicalproperty tests performed on the specimens.9. Report9.1 In reporting data, including observations obt
30、ained byany examination following exposure, make reference to thispractice by designation. Provide the following information:9.1.1 Any deviation from this practice.9.1.2 Include all items referenced in the Report section ofPractice G90,9.1.3 Whether specimen size and preparation was other thanthat s
31、pecified in 8.1, and9.1.4 The information required by the subsequent test stan-dard or commodity specification.10. Keywords10.1 accelerated outdoor weathering; natural sunlight;pressure-sensitive tapeD5105052ASTM International takes no position respecting the validity of any patent rights asserted i
32、n connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the r
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34、eful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM Internation
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