1、Designation: D5105 05 (Reapproved 2011)Standard Practice forPerforming Accelerated Outdoor Weathering of Pressure-Sensitive Tapes Using Concentrated Natural Sunlight1This standard is issued under the fixed designation D5105; the number immediately following the designation indicates the year oforigi
2、nal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Def
3、ense.1. Scope1.1 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
4、 tests are to be 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.
5、It is theresponsibility 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:2D3715/D3715M Practice for Quality Assurance ofPressure-Sensitive TapesG90 Prac
6、tice for Performing Accelerated Outdoor Weather-ing of Nonmetallic Materials Using Concentrated NaturalSunlight2.2 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 V
7、ehicle LightingDevicesRecommended 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 an
8、yprescribed 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-sensitivetap
9、es. The resistance 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 t
10、hese short-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 i
11、n the timing 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
12、one and two years, respectively, of1This practice is under the jurisdiction of ASTM Committee D10 on Packagingand is the direct responsibility of Subcommittee D10.14 on Tape and Labels.Current edition approved Aug. 1, 2011. Published November 2011. Originallyapproved in 1990. Last previous edition a
13、pproved in 2005 as D5105 05. DOI:10.1520/D5105-05R11.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Availab
14、le from Standardization Documents Order Desk, Bldg. 4 Section D, 700Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.4Available from SAE International (SAE), 400 Commonwealth Dr., Warrendale,PA 15096-0001, http:/www.sae.org.5G. A. Zerlaut, M. W. Rupp, and T. E. Anderson, DEST Laboratories, Inc
15、.,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.Available from SAE.6Bauer, D. R., Paputa Peck, M. C., and Carter III, R. O.,“ Evaluat
16、ion 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.exposure in the Southwest and Florida. Since all materials“weather” at different rates in diff
17、erent environments, resultsobtained using 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-year
18、dependent, both qualitatively and quantitatively. 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 E
19、xposure Apparatus, conforming to all of 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
20、 may be used to support the specimen panelwhen 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 accorda
21、nce with the requirementsof the subsequent test standard or applicable material orcommodity specification.6.2 Lacking the previously mentioned documents, samplingshall be in accordance with Practice D3715/D3715M.7. Test Specimens7.1 Unless otherwise specified, prepare and expose at leasttwo replicat
22、e specimens of each tape to be tested. 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
23、 75-mm) strips oftape.7.3 Unwind and discard 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 adhe
24、rence to backing make it impossibleto 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 7
25、5-mm) specimens, centered length-wise, 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 opp
26、osite end of the panel. The end result 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 thi
27、swould be expressed by the test standard 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 app
28、lied, according tospray Cycle 3 of Practice G90 for 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)
29、.8.4 Follow the instructions of the subsequent 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 rep
30、orting data, including observations obtained 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 si
31、ze and preparation was other thanthat specified 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 tapeD5105 05 (2011)2ASTM International takes no position respecti
32、ng the validity of any patent rights asserted in 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 stand
33、ard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM Internation
34、al Headquarters. Your comments will receive careful 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.T
35、his standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).D5105 05 (2011)3
