ASTM D3833/D3833M-96(2011)
(Test Method)Standard Test Method for Water Vapor Transmission of Pressure-Sensitive Tapes
Standard Test Method for Water Vapor Transmission of Pressure-Sensitive Tapes
SIGNIFICANCE AND USE
The results of this test method will indicate the relative permeability by water vapor of the tape through its smallest dimension (generally normal to the tape's backing).
The pathway for the water vapor 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 vapor.
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 vapor 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 vapor 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 covers one procedure for measuring the water vapor transmission rate of 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 exact equivalents; 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 and health practices and determine the applicability of regulatory limitations prior to use.
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D3833/D3833M − 96 (Reapproved 2011)
Standard Test Method for
Water Vapor Transmission of Pressure-Sensitive Tapes
This standard is issued under the fixed designation D3833/D3833M; 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 4. Summary of Test Method
1.1 This test method covers one procedure for measuring 4.1 The pressure-sensitive tape is secured by its adhesive to
the water vapor transmission rate of pressure-sensitive tape. a test cup containing a desiccant. The assembly is exposed to
a controlled atmosphere and weighed after two intervals of that
1.2 The values stated in either SI or inch-pound units are to
exposure. The gain in weight is used to calculate the water
be regarded separately as standard. The values stated in each
vapor transmission rate (WVTR).
system may not be exact equivalents; therefore, each system
must be used independently, without combining values in any
5. Significance and Use
way.
5.1 The results of this test method will indicate the relative
1.3 This standard does not purport to address all of the
permeability by water vapor of the tape through its smallest
safety concerns, if any, associated with its use. It is the
dimension (generally normal to the tape’s backing).
responsibility of the user of this standard to establish appro-
5.1.1 The pathway for the water vapor parallel to the
priate safety and health practices and determine the applica-
adhesive-cup interface is great compared to the tape’s thick-
bility of regulatory limitations prior to use.
ness and the latter is usually the nearly exclusive source of
transmitted vapor.
2. Referenced Documents
5.1.2 Some tape types allow a relatively free path in a
2.1 ASTM Standards:
direction normal to the backing or along backing pathways
D996 Terminology of Packaging and Distribution Environ-
parallel to the adhesive-cup interface allowing the adhesive to
ments
become the principal barrier.
D3715/D3715M Practice for QualityAssurance of Pressure-
5.2 If the adhesive does not continue to adhere to the cup
Sensitive Tapes
flange during the exposure periods allowing unintended path-
D4332 Practice for Conditioning Containers, Packages, or
ways for water vapor to occur, the measurement should be
Packaging Components for Testing
considered as not having been made. Consequently, the tape
E96/E96M Test Methods for Water Vapor Transmission of
might be considered as being inappropriate for use on surfaces
Materials
like the cup flange under moisture conditions approximating
E122 Practice for Calculating Sample Size to Estimate,With
those of the test.
Specified Precision, the Average for a Characteristic of a
Lot or Process
NOTE 1—It may be that the interest is simply in the tape material as a
water vapor 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
3. Terminology
are in order. These are referred to in Section 10.
3.1 Definitions—General terms in this test method are de-
fined in Terminology D996. 6. Apparatus
6.1 Test Cups, made from materials that are nonhygro-
scopic. The cup shall have a zero WVTR. The cups shall be
This test method is under the jurisdiction of ASTM Committee D10 on rectangular with a flat, smooth, rigid flange, and shall have the
Packaging and is the direct responsibility of Subcommittee D10.14 on Tape and
following dimensions:
Labels.
Current edition approved Aug. 1, 2011. Published November 2011. Originally
approved in 1979. Last previous edition approved in 2006 as D3833/D3833M – 96
(2006). DOI: 10.1520/D3833_D3833M-96R11. The sole source of supply of the apparatus known to the committee at this time
For referenced ASTM standards, visit the ASTM website, www.astm.org, or is Chemsultants International, 9349 Hamilton Dr., Mentor, OH 44061–1118. If you
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM are aware of alternative suppliers, please provide this information to ASTM
Standards volume information, refer to the standard’s Document Summary page on International Headquarters. Your comments will receive careful consideration at a
the ASTM website. meeting of the responsible technical committee, which you may attend.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D3833/D3833M − 96 (2011)
this. When the sample material is larger than the specimen
Flange:
Outside–50.8 by 152.4 ± 0.5 mm [2.0 by 6.0 ± 0.02 in.]
dimension trim it to the edges of the flange.
Inside (opening) –25.4 by 101.6 ± 0.5 mm [1.0 by 4.0 ± 0.02 in.]
10.3.1 When the adhesive is lacking or has insufficient
Body:
Inside–25.4 by 101.6 by 38.1 (depth) ± 0.5 mm [1.0 by 4.0 by 1.5 (depth) ±
bonding strength to the flange to maintain a seal during the
0.02 in.]
exposure period, and when the parties concerned are interested
The mass shall not exceed 80 % of the balance capacity used
exclusively in the barrier properties for pathways normal to the
in weighing.
surface of the tape backing, a sealing material such as
6.2 Calcium Chloride, anhydrous, passing a No. 8 (2.36-
aluminum foil-backed pressure-sensitive tape can provide
mm) sieve.
assurance that only the 25.4 by 101.6-mm [1.0 by 4.0-in.] area
at the flange opening is exposed and all edges are covered.
NOTE 2—Regenerate calcium chloride to a sufficiently anhydrous state
by heating it for2hat approximately 200°C [392°F].
10.4 Prepare the remaining assemblies in the same way as
6.3 Test Chamber,controlledat90to95 %relativehumidity
the first.
at 38 6 1°C [100.0 6 2.0°F].The air shall be circulated within
10.5 Place the assemblies into the test chamber for approxi-
the chamber to provide uniform conditions for all specimens
mately a 24-h period, remove, cool for 15 min to the weighing
and shall give no visible condensation on the test cups.
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.