ASTM-D3816 › Historical Revision Information
Standard Test Method for Water Penetration Rate of Pressure-Sensitive Tapes
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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 and health practices and determine the applicability of regulatory limitations prior to use.
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's backing).
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.
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.
Keywords
pressure-sensitive tape; water penetration rate ; Penetration--adhesives; Permeability; Cup flange; Pressure-sensitive tapes; Water penetration
To find similar documents by ASTM Volume:
15.10 (Packaging; Flexible Barrier Packaging)
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Document Number
ASTM-D3816/D3816M-96(2012)
Revision Level
1996 R12 EDITION
Status
Superseded
Modification Type
Reapproval
Publication Date
May 31, 2012
Document Type
Test Method
Page Count
3 pages
Committee Number
D10.14