ASTM D3816/D3816M-96(2020)
(Test Method)Standard Test Method for Water Penetration Rate of Pressure-Sensitive Tapes
Standard Test Method for Water Penetration Rate of Pressure-Sensitive Tapes
SIGNIFICANCE AND USE
5.1 The results of this test method will indicate the relative permeability by water of the tape through its smallest dimension (generally normal to the tape's backing).
5.1.1 The pathway for the water parallel to the adhesive-cup interface is great compared to the tape's thickness and the latter is usually the nearly exclusive source of transmitted water.
5.1.2 Some tape types allow a relatively free path in a direction normal to the backing or along backing pathways parallel to the adhesive-cup interface, allowing the adhesive to become the principal barrier.
5.2 If the adhesive does not continue to adhere to the cup flange during the exposure periods, allowing unintended pathways for water to occur, the measurement should be considered as not having been made. Consequently, the tape might be considered as being inappropriate for use on surfaces like the cup flange under moisture conditions approximating those of the test.
Note 1: It may be that the interest is simply in the tape material as a water barrier. In this case how well the tape adheres to the cup flange may be of little consequence and steps to prevent any edge effects are in order. These are referred to in Section 10.
SCOPE
1.1 This test method provides one procedure for measuring the water penetration rate of 2-in. or wider pressure-sensitive tape.
1.2 The values stated in either SI or inch-pound units are to be regarded separately as standard. The values stated in each system may not be equivalent; therefore, each system must be used independently, without combining values in any way.
1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
Relations
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D3816/D3816M − 96 (Reapproved 2020)
Standard Test Method for
Water Penetration Rate of Pressure-Sensitive Tapes
This standard is issued under the fixed designation D3816/D3816M; 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 U.S. Department of Defense.
1. Scope 3. Terminoloy
3.1 Definitions— General terms in this test method are
1.1 This test method provides one procedure for measuring
the water penetration rate of 2-in. or wider pressure-sensitive defined in Terminology D996.
tape.
4. Summary of Test Method
1.2 The values stated in either SI or inch-pound units are to
4.1 The pressure-sensitive tape to be tested is secured by its
be regarded separately as standard. The values stated in each
adhesive to a test cup containing a desiccant. The assembly is
system may not be equivalent; therefore, each system must be
weighed, then reweighed following submersion under a speci-
used independently, without combining values in any way.
fied head of water for a specified period of time. The gain in
1.3 This standard does not purport to address all of the
weight is used to calculate the water penetration rate.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro- 5. Significance and Use
priate safety, health, and environmental practices and deter-
5.1 The results of this test method will indicate the relative
mine the applicability of regulatory limitations prior to use.
permeability by water of the tape through its smallest dimen-
1.4 This international standard was developed in accor-
sion (generally normal to the tape’s backing).
dance with internationally recognized principles on standard-
5.1.1 The pathway for the water parallel to the adhesive-cup
ization established in the Decision on Principles for the
interfaceisgreatcomparedtothetape’sthicknessandthelatter
Development of International Standards, Guides and Recom-
is usually the nearly exclusive source of transmitted water.
mendations issued by the World Trade Organization Technical
5.1.2 Some tape types allow a relatively free path in a
Barriers to Trade (TBT) Committee.
direction normal to the backing or along backing pathways
parallel to the adhesive-cup interface, allowing the adhesive to
2. Referenced Documents
become the principal barrier.
2.1 ASTM Standards:
5.2 If the adhesive does not continue to adhere to the cup
D996 Terminology of Packaging and Distribution Environ-
flange during the exposure periods, allowing unintended path-
ments
waysforwatertooccur,themeasurementshouldbeconsidered
D3715/D3715M Practice for QualityAssurance of Pressure-
as not having been made. Consequently, the tape might be
Sensitive Tapes
considered as being inappropriate for use on surfaces like the
D4332 Practice for Conditioning Containers, Packages, or
cup flange under moisture conditions approximating those of
Packaging Components for Testing
the test.
E122 Practice for Calculating Sample Size to Estimate,With
NOTE 1—It may be that the interest is simply in the tape material as a
Specified Precision, the Average for a Characteristic of a
water barrier. In this case how well the tape adheres to the cup flange may
Lot or Process
be of little consequence and steps to prevent any edge effects are in order.
These are referred to in Section 10.
6. Apparatus
This test method is under the jurisdiction of ASTM Committee D10 on
6.1 Test Cups, made from materials that are nonhygro-
Packaging and is the direct responsibility of Subcommittee D10.14 on Tape and
Labels.
scopic.The cup shall have a zero water vapor transmission rate
Current edition approved Oct. 1, 2020. Published October 2020. Originally
approved in 1979. Last previous edition approved in 2012 as D3816/
D3816M – 96 (2012). DOI: 10.1520/D3816_D3816M-96R20. The sole source of supply of the apparatus known to the committee at this time
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the ASTM website. meeting of the responsible technical committee, which you may attend.
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D3816/D3816M − 96 (2020)
(WVTR). The cups shall be rectangular with a flat, smooth, 10.2 Fill the test cup to within approximately 3 mm [ ⁄8 in.]
rigid flange and shall have the following dimensions: of the opening with the anhydrous calcium chloride and make
sure it will not come into contact with the adhesive of the
Flange:
Outside–50.8 by 152.4 ± 0.5 mm [2.0 by 6.0 ± 0.02 in.].
specimen.
Inside (opening) –25.4 by 101.6 ± 0.5 mm [1.0 by 4.0 ± 0.02 in.].
Body:
10.3 Apply the specimen to the flange, adhesive against it,
Inside–25.4 by 101.6 by 38.1 (depth) ± 0.5 mm [1.0 by 4.0 by 1.5 (depth) ±
allowingnobubblesorwrinkles.Usefingerpressuretoachieve
0.02 in.].
this. When the sample material is larger than the specimen
The mass shall not exceed 80 % of the balance capacity used
dimension, trim it to the edges of the flange.
in weighing.
10.3.1 When the adhesive is lacking or has insufficient
6.2 Desiccant, calcium chloride, anhydrous, passing a No. 8
bonding strength to the flange to maintain a seal during the
[2.36-mm] sieve.
exposure period, and when the parties concerned are interested
exclusively in the barrier properties for pathways normal to the
NOTE 2—Regenerate calcium chloride to a sufficientl
...
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