1、Designation: D 3611 06Standard Practice forAccelerated Aging of Pressure-Sensitive Tapes1This standard is issued under the fixed designation D 3611; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A numbe
2、r 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. Scope1.1 This practice provides one environment in which toexpose f
3、inished pressure-sensitive tape material for the purposeof accelerating the aging of it. It is applicable to tape in rollform when the user observes the precautions detailed withinthe procedure. The practice does not provide for a conclusionwithin itself, but is for use in conjunction with appearanc
4、e orphysical property tests to follow the accelerated exposure.While this practice was developed using packaging type tapes,its use on other types of tape with similar construction isencouraged. It is not intended for use on electrical grade tapes(see Test Methods D 1000).1.2 This standard does not
5、purport to address all of thesafety concerns, if any, associated with its use. 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:
6、2D 996 Terminology of Packaging and Distribution Environ-mentsD 1000 Test Methods for Pressure-Sensitive Adhesive-Coated Tapes Used for Electrical and Electronic Applica-tionsD 3330/D 3330M Test Method for Peel Adhesion ofPressure-Sensitive TapeD 3715/D 3715M Practice for Quality Assurance ofPressur
7、e-Sensitive TapesD 4332 Practice for Conditioning Containers, Packages, orPackaging Components for Testing3. Terminology3.1 Terminology found in Terminology D 996 shall apply.4. Summary of Practice4.1 The pressure-sensitive tape is exposed to an atmosphereof 80 % relative humidity at 150F (66C) for
8、a period of 96 h.Following a period for returning to a standard atmosphere, thetape is ready for a prescribed examination using a method suchas Test Methods D 3330/D 3330M.5. Significance and Use5.1 This practice accelerates the natural aging of pressure-sensitive tapes so that the response to the u
9、sual physicalproperty tests changes to the same extent as with an exposureto approximately two years of natural aging when comparedwith the response to tests before aging.5.1.1 Natural aging in this context means a continuousperiod of aging of tape in a closed fibreboard container (indarkness) in th
10、e variable climate of either the warm moistsouth, the warm dry southwest or the moderate midcontinent,USA.5.2 The extent of change for one physical property shouldbe expected to be different than for another property and sowould also relate to different natural aging time.5.3 An abnormal product lot
11、 may cause differences intesting response that throw off the expected time patterns.5.4 Appearance of normal tape product will usually changeonly slightly on two years natural aging. This acceleratedexposure usually produces an exaggerated change in appear-ance which would be seen under natural cond
12、itions only inabnormal product.5.5 There is no present experience to relate this acceleratedexposure to responses of tape in applications where the tape isunder a use stress.6. Apparatus6.1 Humidity Vessel in Oven Procedure:6.1.1 Vessel, to contain a solution of ammonium sulphateand tape undergoing
13、exposure. The vessel must meet thefollowing requirements:1This 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 Oct. 1, 2006. Published October 2006. Originallyapproved in 1977. La
14、st previous edition approved in 2003 as D 3611 89 (2003).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.1Cop
15、yright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6.1.1.1 Vented to allow equilibrium with an opening not toexceed 0.01 mm.26.1.1.2 The air volume over the solution to be not more than10 % greater than the cube of the square root of the li
16、quidsurface area.6.1.1.3 The air depth of the vessel to the liquid surface to benot more than 10 % greater than the square root of the liquidsurface area.6.1.1.4 Adesiccator assembly with a perforated plate can bea suitable vessel.6.1.2 Oven, of the forced-convection type maintained at amean of 66 6
17、 2C (150 6 4F).6.2 Humidity chamber, to contain rolls of tape maintained ata mean of 66 6 2C (150 6 4F) and 80 6 5 % relativehumidity.7. Reagents (for Humidity Vessel in Oven procedure)7.1 Purity of ReagentsReagent grade chemicals shall beused in all tests. Unless otherwise indicated, it is intended
18、 thatall reagents shall conform to the specification of the Committeeon Analytical Reagents of the American Chemical Society,where such specifications are available.3Other grades may beused, provided it is first ascertained that the reagent is ofsufficiently high purity to permit its use without les
19、sening theaccuracy of the determination.7.2 Ammonium Sulfate (NH4)2SO4.7.3 Water, distilled or demineralized.7.4 The reagents of 7.2 and 7.3 are to be dissolved togetherin the proportion of 1 + 1 by weight. Use a volume (the unitswill be cubic centimetres) of water not less than that obtainedby mult
20、iplying 500 times 132 times the vessel air volume incubic metres. This gives 500 times the number of grams ofwater required to humidify the air volume to 80 % relativehumidity at 150F (66C) and should supply the moisturerequired to accommodate the absorption by the sample rolls.This provides a satur
21、ated solution which will remain saturatedat 150F (66C). This solution within the closed vessel bothprovides and controls the moisture content (humidity) withinthe vessel.8. Sampling8.1 Sampling of material for this practice should be inaccordance with the requirements of the applicable material orco
22、mmodity specification.8.2 Lacking the previously mentioned specification, sam-pling should be as required in the physical property methodapplicable to the testing to follow the exposure.8.3 When no other sampling requirement is applicable,sampling should be as set forth in Practice D 3715/D 3715M.9.
23、 Sample9.1 The sample should consist of rolls of tape.9.1.1 The quantity of tape in any sample roll need not bemore than necessary to supply the specimens for the physicalproperty tests to follow the exposure.9.1.2 No sample roll should be less than12 in. (12 mm) inwidth.9.1.3 Sample rolls should be
24、 originally wound, not rewoundrolls.10. Procedure10.1 Humidity Vessel in Oven:10.1.1 Place the sample rolls above the solution in the vesselso that roll edges lie in a horizontal plane (parallel with theliquid surface). Include no more sample rolls than will displaceone fourth of the air volume in t
25、he vessel.10.1.2 Arrange the sample rolls so that all surfaces areexposed to the humid air in the vessel. Use separators thatallow free air space around and between the rolls and which arenon-hygroscopic.10.1.3 Close the assembly and place in the oven.10.1.4 Assure that care is taken to prevent the
26、solution fromwetting any part of the assembly (including tape), other thanthe reservoir it occupies, when the assembly is moved in andout of the oven. This reduces salt deposition and crystallinebuild-up.10.1.5 Remove the assembly from the oven after 96 h.Immediately remove the sample rolls from the
27、 assembly.10.1.6 Condition the sample in the standard conditioningatmosphere described in Practice D 4332 for a minimum of 4h with free air space around the rolls.10.1.7 Conditioning is intended to produce an equilibriumin both temperature and moisture of samples with the standardconditions. This ma
28、y require 24 or 48 h for some materials.10.1.8 Ascertain if the desired equilibrium is present byperforming the physical property test(s) at 4 h and again atsome later time. If no significant difference is found, thedesired equilibrium is satisfied or it is of no importance to thetest outcome.10.1.9
29、 Perform the physical examination(s) for which thisaccelerated aging exposure was preparatory.NOTE 1The environment for this practice cannot occur unless thevessel used as the environment container is vented so that pressuredifferences between the inside and the outside of the vessel can bebalanced.
30、 The environment in the vessel is dependent on careful obser-vation of the requirements of loading in relationship to vessel volume andliquid surface area in accordance with Section 7.10.2 Humidity Chamber:10.2.1 Place the sample rolls on a rack in the humiditychamber so that roll edges lie in a hor
31、izontal plane. Include nomore sample rolls than will displace one fourth of the airvolume in the chamber10.2.2 Arrange the sample rolls so that all surfaces areexposed to the humid air in the chamber. Use separators thatallow free air space around and between the rolls and which arenon-hygroscopic.1
32、0.2.3 Close humidity chamber.10.2.4 Remove the tape from the humidity chamber after 96h.3Reagent Chemicals, American Chemical Society Specifications, AmericanChemical Society, Washington, DC. For Suggestions on the testing of reagents notlisted by the American Chemical Society, see Analar Standards
33、for LaboratoryChemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeiaand National Formulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rockville,MD.D361106210.2.5 Condition the sample in the standard conditioningatmosphere described in Practice D 4332 for a minimum of 4h with
34、free air space around the rolls.10.2.6 Conditioning is intended to produce an equilibriumin both temperature and moisture of samples with the standardconditions. This may require 24 or 48 h for some materials.10.2.7 Ascertain if the desired equilibrium is present byperforming the physical property t
35、est(s) at 4 h and again atsome later time. If no significant difference is found, thedesired equilibrium is satisfied or it is of no importance to thetest outcome.10.2.8 Perform the physical examination(s) for which thisaccelerated aging exposure was preparatory.11. Report11.1 In reporting data obta
36、ined by any examination follow-ing this exposure, make reference to this practice by designa-tion. Use the form: Performance of test data reported herefollowed exposure by ASTM Practice D 3611.12. Keywords12.1 accelerated aging; pressure-sensitive tapeAPPENDIX(Nonmandatory Information)X1. NOTES ON T
37、HE EFFECT OF THIS EXPOSURE ON PHYSICAL PROPERTY TEST VARIABILITY AND THEEXPOSURES RELATIONSHIP TO NATURAL AGINGX1.1 Industry experience shows that this exposure can havea variable effect on the tape. This is like the variability in anytest method that we commonly term its precision. It is an effectd
38、ue to the small differences that occur in performing any stepof a process. For instance, when repeating this conditioningone might not set the temperature exactly the same or theatmospheric pressure might vary or the purity of the salt mightdiffer from different vendors. These small differences resu
39、lt inslightly different aging of the tape from time to time. Thisvariation does not appear as something we can measuredirectly on its own. It is superimposed on the variabilityinherent in performance of the subsequent physical propertytest for which this conditioning was preparatory. We do notexpect
40、 this superimposed (added) variability effect to be great.Since it is seen as a change in the apparent variability of thephysical property test results, we can relate it to the expectedprecision of the test by making the following statement:X1.2 The effect of this exposure on the inter-laboratorypre
41、cision of any physical property test performed on the samelot of product is expected to be no more than 25 % increase indispersion over that expected from the test without firstperforming the accelerated aging exposure. An illustration ofthis can be made with the peel adhesion test. If that test had
42、 aprecision statement reading, “The multi-laboratory precision ofthe peel adhesion method is 612 % of the mean at the 95 %confidence level,” we would expect that after this conditioningthe response to the peel test would make that precision toappear to have lessened to 615 % of the mean.X1.3 It shou
43、ld be explained that with pressure-sensitivetapes, as with other materials which are “destroyed” during thetesting process, one can never measure the same physicalproperty more than once on the same specimen of tape. Thismeans that a measurement of precision for a physical propertytest on tape alway
44、s has as one of its components the inherentvariability between tape specimens. Aging reduces this inher-ent variability between specimens for some types of tape andsome tests. Therefore this conditioning does not always causean increase in dispersion.X1.4 ASTM subgroup studies show that the relation
45、shipbetween this exposure and any natural aging is irregular andvaries not only with the test but also the tape product.4It wassaid in 5.1 that this exposure produces an effect in the responsewhich would occur with approximately two years of naturalaging. For example, a given type of tape a specifie
46、d physicalproperty test might yield data comparable to 2.5 years ofnatural aging. A different type of tape could yield datacomparable to more or less than that time period.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned
47、in 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 responsible technical committee and m
48、ust 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 International Headquarters. Your comments will receive careful consideration at a meeting of t
49、heresponsible 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 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
