ASTM D3816/D3816M-96(2007)
(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
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’backing).
5.1.1 The pathway for the water parallel to the adhesive-cup interface is great compared to the tape’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.
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.
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 and health practices and determine the applicability of regulatory limitations prior to use.
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Designation:D3816/D3816M–96 (Reapproved 2007)
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 Department of Defense.
1. Scope weighed, then reweighed following submersion under a speci-
fied head of water for a specified period of time. The gain in
1.1 This test method provides one procedure for measuring
weight is used to calculate the water penetration rate.
the water penetration rate of 2-in. or wider pressure-sensitive
tape.
5. Significance and Use
1.2 The values stated in either SI or inch-pound units are to
5.1 The results of this test method will indicate the relative
be regarded separately as standard. The values stated in each
permeability by water of the tape through its smallest dimen-
system may not be equivalent; therefore, each system must be
sion (generally normal to the tape’s backing).
used independently, without combining values in any way.
5.1.1 The pathway for the water parallel to the adhesive-cup
1.3 This standard does not purport to address all of the
interfaceisgreatcomparedtothetape’sthicknessandthelatter
safety concerns, if any, associated with its use. It is the
is usually the nearly exclusive source of transmitted water.
responsibility of the user of this standard to establish appro-
5.1.2 Some tape types allow a relatively free path in a
priate safety and health practices and determine the applica-
direction normal to the backing or along backing pathways
bility of regulatory limitations prior to use.
parallel to the adhesive-cup interface, allowing the adhesive to
2. Referenced Documents become the principal barrier.
5.2 If the adhesive does not continue to adhere to the cup
2.1 ASTM Standards:
flange during the exposure periods, allowing unintended path-
D996 Terminology of Packaging and Distribution Environ-
waysforwatertooccur,themeasurementshouldbeconsidered
ments
as not having been made. Consequently, the tape might be
D3715/D3715M Practice for Quality Assurance of
considered as being inappropriate for use on surfaces like the
Pressure-Sensitive Tapes
cup flange under moisture conditions approximating those of
D4332 Practice for Conditioning Containers, Packages, or
the test.
Packaging Components for Testing
E122 Practice for Calculating Sample Size to Estimate,
NOTE 1—It may be that the interest is simply in the tape material as a
With Specified Precision, the Average for a Characteristic
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.
of a Lot or Process
These are referred to in Section 10.
3. Terminoloy
6. Apparatus
3.1 Definitions—General terms in this test method are
6.1 Test Cups, made from materials that are nonhygro-
defined in Terminology D996.
scopic.The cup shall have a zero water vapor transmission rate
4. Summary of Test Method (WVTR). The cups shall be rectangular with a flat, smooth,
rigid flange and shall have the following dimensions:
4.1 The pressure-sensitive tape to be tested is secured by its
Flange:
adhesive to a test cup containing a desiccant. The assembly is
Outside–50.8 by 152.4 60.5mm[2.0by6.0 6 0.02 in.].
Inside (opening)–25.4 by 101.6 60.5mm[1.0by4.0 6 0.02 in.].
Body:
Inside–25.4 by 101.6 by 38.1 (depth) 6 0.5 mm [1.0 by 4.0 by 1.5 (depth)
This test method is under the jurisdiction of ASTM Committee D10 on
6 0.02 in.].
Packaging and is the direct responsibility of Subcommittee D10.14 on Tape and
Labels.
Current edition approved Oct. 1, 2007. Published October 2007. Originally
approved in 1979. Last previous edition approved in 2003 as D3816 – 96 (2003).
DOI: 10.1520/D3816_D3816M-96R07. The sole source of supply of the apparatus known to the committee at this time
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D3816/D3816M–96 (2007)
The mass shall not exceed 80 % of the balance capacity used exposure period, and when the parties concerned are interested
in weighing. exclusively in the barrier properties for pathways normal to the
6.2 Desiccant, calcium chloride, anhydrous, passing a No. 8 surface of the tape backing, a sealing material such as
[2.36-mm] sieve. aluminum foil-backed pressure-sensitive tape can provide
assurance that only the 25.4 by 101.6-mm [1.0 by 4.0-in.] area
NOTE 2—Regenerate calcium chloride to a sufficiently anhydrous state
at the flange opening is exposed and all edges are sealed.
by heating it for2hat approximately 392°F [200°C].
10.4 Prepare the remaining assemblies in the same way as
6.3 Water Container—Any vessel allowing for sufficient
the first.
water depth to cover the test specimen assemblies with a
10.5 Heat the assemblies in the oven at 49°C [120°F] for 30
25-mm [1.0-in.] head of water.
min.
6.4 Water, distilled or deionized, in sufficient quantity to
10.6 Cool at standard conditions (Section 9) for 30 min and
sup
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