ASTM D3811/D3811M-96(2006)

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Designation:D3811/D3811M–96 (Reapproved 2006)
Standard Test Method for
Unwind Force of Pressure-Sensitive Tapes
This standard is issued under the fixed designation D3811/D3811M; 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 tester. While the crosshead is moved at a specified rate, the
maximum force measured during unwinding of approximately
1.1 This test method covers one procedure for determining
150 mm [6 in.] of tape is taken as the unwind force.
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
5. Significance and Use
be regarded separately as standard. The values stated in each
5.1 This procedure simulates hand and machine unwinding
system may not be exact equivalents; therefore, each system
of tape at low rates. The force required for unwinding at low
must be used independently, without combining values in any
ratesisafunctionofrate.Atsomerate(expectedtobedifferent
way.
for each construction type and manufacturer) there occurs an
1.3 This standard does not purport to address all of the
inversionoftheresponse.Therateforthistestmethoddoesnot
safety concerns, if any, associated with its use. It is the
allow for comparisons of different tapes that will be unwound
responsibility of the user of this standard to establish appro-
at high rates.
priate safety and health practices and determine the applica-
5.2 This procedure can be used to indicate satisfaction
bility of regulatory limitations prior to use.
where a specification for unwind, either maximum or mini-
2. Referenced Documents mum, is established and when the responses referred to in 5.1
are taken into consideration.
2.1 ASTM Standards:
D996 Terminology of Packaging and Distribution Environ-
6. Apparatus
ments
6.1 Unwind Force Tester—A CRE tension tester shall be
D3715/D3715M Practice for Quality Assurance of
used.The tester shall have two clamps with centers in the same
Pressure-Sensitive Tapes
plane, parallel with the direction of motion of the stressing
D4332 Practice for Conditioning Containers, Packages, or
clamp, and so aligned that they will hold the specimen wholly
Packaging Components for Testing
in the same plane; a means of moving the stressing clamp at a
E122 Practice for Calculating Sample Size to Estimate,
uniform rate of 5 6 0.2 mm/s [12.0 6 0.5 in./min]; and an
With Specified Precision, the Average for a Characteristic
autographic device for recording load. The instrument shall be
of a Lot or Process
calibrated to an accuracy of 0.5 % full scale. The scale range
3. Terminology used for any test shall be such that the mean test level falls
within 20 to 50 % of full scale.
3.1 Definitions—General terms in this test method are
6.2 Free-Turning Spindle, sized to fit snugly inside the
defined in Terminology D996.
sample tape core, with its axis horizontally supported in a
4. Summary of Test Method frame that can be held in the clamp on the crosshead of the
unwind tester that is not supporting the load cell.
4.1 The sample roll of tape is placed on a free-turning
spindle held in a CRE (constant-rate-of-extension) tension
7. Sampling
7.1 Acceptance Sampling—Samplingshallbeinaccordance
with Practice D3715/D3715M.
This test method is under the jurisdiction of ASTM Committee D10 on
7.2 Sampling for Other Purposes—The sampling and num-
Packaging and is the direct responsibility of Subcommittee D10.14 on Tape and
ber of test specimens depends on the purpose of the testing.
Labels.
Current edition approved April 1, 2006. Published April 2006. Originally
approved in 1979. Last previous edition approved in 2001 as D3811/
D3811M – 96 (2001). DOI: 10.1520/D3811_D3811M-96R06. The sole source of supply of the apparatus known to the committee at this time
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