1、Designation: D3816/D3816M 96 (Reapproved 2012)Standard Test Method forWater Penetration Rate of Pressure-Sensitive Tapes1This standard is issued under the fixed designation D3816/D3816M; the number immediately following the designation indicates theyear of original adoption or, in the case of revisi
2、on, the year of last revision. A number in parentheses indicates the year of lastreapproval. 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. Scope1.1 This test method prov
3、ides one procedure for measuringthe water penetration rate of 2-in. or wider pressure-sensitivetape.1.2 The values stated in either SI or inch-pound units are tobe regarded separately as standard. The values stated in eachsystem may not be equivalent; therefore, each system must beused independently
4、, without combining values in any way.1.3 This standard does not 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 li
5、mitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D996 Terminology of Packaging and Distribution Environ-mentsD3715/D3715M Practice for Quality Assurance ofPressure-Sensitive TapesD4332 Practice for Conditioning Containers, Packages, orPackaging Components for TestingE122 Practice fo
6、r Calculating Sample Size to Estimate,With Specified Precision, the Average for a Characteristicof a Lot or Process3. Terminoloy3.1 DefinitionsGeneral terms in this test method aredefined in Terminology D996.4. Summary of Test Method4.1 The pressure-sensitive tape to be tested is secured by itsadhes
7、ive to a test cup containing a desiccant. The assembly isweighed, then reweighed following submersion under a speci-fied head of water for a specified period of time. The gain inweight is used to calculate the water penetration rate.5. Significance and Use5.1 The results of this test method will ind
8、icate the relativepermeability by water of the tape through its smallest dimen-sion (generally normal to the tapes backing).5.1.1 The pathway for the water parallel to the adhesive-cupinterface is great compared to the tapes thickness and the latteris usually the nearly exclusive source of transmitt
9、ed water.5.1.2 Some tape types allow a relatively free path in adirection normal to the backing or along backing pathwaysparallel to the adhesive-cup interface, allowing the adhesive tobecome the principal barrier.5.2 If the adhesive does not continue to adhere to the cupflange during the exposure p
10、eriods, allowing unintended path-ways for water to occur, the measurement should be consideredas not having been made. Consequently, the tape might beconsidered as being inappropriate for use on surfaces like thecup flange under moisture conditions approximating those ofthe test.NOTE 1It may be that
11、 the interest is simply in the tape material as awater barrier. In this case how well the tape adheres to the cup flange maybe of little consequence and steps to prevent any edge effects are in order.These are referred to in Section 10.6. Apparatus6.1 Test Cups,3made from materials that are nonhygro
12、-scopic. The cup shall have a zero water vapor transmission rate(WVTR). The cups shall be rectangular with a flat, smooth,rigid flange and shall have the following dimensions:Flange:Outside50.8 by 152.4 6 0.5mm2.0by6.06 0.02 in.Inside (opening)25.4 by 101.6 6 0.5mm1.0by4.06 0.02 in.Body:Inside25.4 b
13、y 101.6 by 38.1 (depth) 6 0.5 mm 1.0 by 4.0 by 1.5 (depth)6 0.02 in.1This test method is under the jurisdiction of ASTM Committee D10 onPackaging and is the direct responsibility of Subcommittee D10.14 on Tape andLabels.Current edition approved April 1, 2012. Published May 2012. Originallyapproved i
14、n 1979. Last previous edition approved in 2007 as D3816 96 (2007).DOI: 10.1520/D3816_D3816M-96R12.2For 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 Docu
15、ment Summary page onthe ASTM website.3The sole source of supply of the apparatus known to the committee at this timeis Chemsultants International, 9349 Hamilton Dr., Mentor, OH 440611118. If youare aware of alternative suppliers, please provide this information to ASTMInternational Headquarters. You
16、r comments will receive careful consideration at ameeting of the responsible technical committee,1which you may attend.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.The mass shall not exceed 80 % of the balance capacity usedin weig
17、hing.6.2 Desiccant, calcium chloride, anhydrous, passing a No. 82.36-mm sieve.NOTE 2Regenerate calcium chloride to a sufficiently anhydrous stateby heating it for2hatapproximately 392F 200C.6.3 Water ContainerAny vessel allowing for sufficientwater depth to cover the test specimen assemblies with a2
18、5-mm 1.0-in. head of water.6.4 Water, distilled or deionized, in sufficient quantity tosupply the water head within the container.6.5 Balance, accurate to 61 mg.6.6 Oven, air-circulating, maintained at 49 6 1C 12062F.7. Sampling7.1 Acceptance SamplingSampling shall be in accordancewith Practice D371
19、5/D3715M.7.2 Sampling for Other PurposesThe sampling and thenumber of test specimens depends on the purpose of thetesting. Practice E122 is recommended. It is common to test atleast five specimens of a particular tape. Test specimens shouldbe taken from several rolls of tape and whenever possible,am
20、ong several production runs of a tape. Strong conclusionsabout a specific property of a tape cannot be based on testresults of a single unit (roll) of a product.8. Test Specimens8.1 Prepare three specimens for each sample or sample roll.8.2 Specimens shall be 50 minus 2.5 mm 2.0 minus 0.1 in.wide an
21、d 155 minus 2.5 mm 6.0 minus 0.2 in. long from thesample material.8.3 When the sample material is pressure-sensitive tapewound in roll form, unwind and discard at least three, but nomore than six, outer wraps of tape from the sample roll beforetaking specimens for testing.8.4 Remove specimens from a
22、 freely rotating roll at the rateof 500 to 750 mm 20 to 30 in./s. Where width or other factorscausing high adherence to backing make it impossible toremove the specimen at the prescribed rate, remove it at a rateas close to 500 mm 20 in./s as possible.9. Conditioning9.1 Weigh in the standard conditi
23、oning atmosphere as de-scribed in Practice D4332.10. Procedure10.1 Prepare each specimen assembly individually.10.2 Fill the test cup to within approximately 3 mm 18 in.of the opening with the anhydrous calcium chloride and makesure it will not come into contact with the adhesive of thespecimen.10.3
24、 Apply the specimen to the flange, adhesive against it,allowing no bubbles or wrinkles. Use finger pressure to achievethis. When the sample material is larger than the specimendimension, trim it to the edges of the flange.10.3.1 When the adhesive is lacking or has insufficientbonding strength to the
25、 flange to maintain a seal during theexposure period, and when the parties concerned are interestedexclusively in the barrier properties for pathways normal to thesurface of the tape backing, a sealing material such asaluminum foil-backed pressure-sensitive tape can provideassurance that only the 25
26、.4 by 101.6-mm 1.0 by 4.0-in. areaat the flange opening is exposed and all edges are sealed.10.4 Prepare the remaining assemblies in the same way asthe first.10.5 Heat the assemblies in the oven at 49C 120F for 30min.10.6 Cool at standard conditions (Section 9) for 30 min andweigh to the nearest 5 m
27、g. This will be W1for the equation inSection 11.10.7 Submerge the assemblies under 23 to 25 mm 0.9 to1.0 in. of water (6.4) at 23 6 2C 73.4 6 3.6F for 48 h.10.7.1 On removal from the water, use a lintless absorbentcloth or paper to remove visible water from the assemblies.10.8 Place the assemblies i
28、n the oven at 49C 120F for 30min.10.9 Cool at standard conditions (Section 9) for 30 min andweigh to the nearest 5 mg. This will be W2for the equation inSection 11.11. Calculation11.1 Calculate the water penetration rate (WPR) for eachspecimen in g/m2g/100 in.2 of tape area in 24 h to the nearest0.0
29、5 g as follows:WPR 5W22 W1! 2400T 3 A(1)where:W1= weight from 10.6,g,W2= weight from 10.9,g,T = time of exposure between W1and W2,h,andA = area of cup opening, 0.0028 m2 4 in.2.12. Report12.1 The report shall include the following:12.1.1 Statement that this test method was used. Indicateany deviatio
30、ns from this test method as written.12.1.2 Whether the edges were sealed or unsealed.12.1.3 Manufacturers name and designation for the tape.12.1.4 Report the results found in Section 11 as the averageand the standard deviation. Report the number of samples.13. Precision and Bias413.1 Precision:13.1.
31、1 An interlaboratory evaluation of two types ofpressure-sensitive tape by four laboratories has been con-ducted. The following summary presents the standard devia-tions as percentages of the mean. These may be larger orsmaller for any particular tape type or any particular manufac-turer. Careful tre
32、atment of outliers (individual extreme datum)may reduce the reported measures of precision.Residual (within roll and replication error) 110.9 %4Supporting data are available from ASTM Headquarters. Request RR: D10-1002, Report 2.D3816/D3816M 96 (2012)2Between rolls (of one tape type) 18.7 %Between p
33、eople (testers in one laboratory) 09.1 %Between laboratories 25.8 %13.1.2 These may be combined in several ways to obtain thedesired estimate of precision. Since the repeatability (within-laboratory replication error) can be determined by a laboratoryfor a particular tape, this information can be us
34、ed with thereported information to obtain more meaningful estimates ofprecision.13.2 BiasNo measure of bias is possible with this testmethod because an accepted reference or referee value is notavailable.14. Keywords14.1 pressure-sensitive tape; water penetration rateASTM International takes no posi
35、tion respecting 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 responsibili
36、ty.This standard 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 AST
37、M International 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
38、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(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).D3816/D3816M 96 (2012)3
