Standard Test Method for
Unwind Force of Pressure-Sensitive Tapes1
This standard is issued under the fixed designation D 3811/D 3811M; 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 (e) 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
1.1 This test method provides one procedure for determining the force required to unwind a roll 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
the 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 associated with its use if any. It is the
responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations before use.
2. Referenced Documents
2.1 ASTM Standards:
D 996 Terminology of Packaging and Distribution Environments2
D 3715/D 3715M Practice for Quality Assurance of
Pressure-Sensitive Tapes2
D 4332 Practice for Conditioning Containers, Packages, or
Packaging Components for Testing2
E 122 Practice for Calculating Sample Size to Estimate,
With a Specified Tolerable Error, the Average for a
Characteristics of a Lot or Process3
3. Terminology
3.1 Definitions: General terms in this test method are
defined in Terminology D 996.
4. Summary of Test Method
4.1 The sample roll of tape is placed on a free-turning
spindle held in a CRE (constant-rate-of-extension) tension
tester. While the crosshead is moved at a specified rate, the
maximum force measured during unwinding of approximately
150 mm [6 in.] of tape is taken as the unwinding force.
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