ASTM D6252/D6252M-98(2011)
(Test Method)Standard Test Method for Peel Adhesion of Pressure-Sensitive Label Stocks at a 90° Angle
Standard Test Method for Peel Adhesion of Pressure-Sensitive Label Stocks at a 90° Angle
SIGNIFICANCE AND USE
This test method is a tool for quality assurance use. Given a pressure-sensitive label stock and a requirement in terms of the minimum or maximum peel adhesion value expected for this label stock, the data from the test can be used in conjunction with acceptance criteria.
This test method can show the relative bond strength of a given label stock to one or more surfaces of varied material and texture as compared to the standard stainless steel panel. Substitution of panels representative of the proposed substrates for the standard stainless steel panel would be acceptable for this procedure.
SCOPE
1.1 This test method covers the measurement of the peel adhesion of pressure-sensitive label stocks. This test method gives a measure of the adherence to a standard steel substrate or to other surfaces of interest for a pressure-sensitive label stock.
1.2 This test method provides a means of assessing the uniformity of the adhesion of a given type of pressure-sensitive label stock. The assessment may be within a sheet or roll, between sheets or rolls, or between production lots.
1.3 Variations in the label stock facestock and adhesive can affect the response; therefore, this test method cannot be used to pinpoint the specific cause(s) of nonuniformity.
1.4 This test method may not be appropriate to test label stocks having either stiff backings or backings showing a high stretch at low forces. These characteristics could result in a high variability of the test response, which is not a true indication of the real nature of the adhesive bond.
1.5 The values stated in either SI or inch-pound units are to be regarded separately as the 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.
1.6 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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D6252/D6252M − 98 (Reapproved 2011)
Standard Test Method for
Peel Adhesion of Pressure-Sensitive Label Stocks at a 90°
Angle
This standard is issued under the fixed designation D6252/D6252M; 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.
1. Scope A666 Specification forAnnealed or Cold-WorkedAustenitic
Stainless Steel Sheet, Strip, Plate, and Flat Bar
1.1 This test method covers the measurement of the peel
D996 Terminology of Packaging and Distribution Environ-
adhesion of pressure-sensitive label stocks. This test method
ments
gives a measure of the adherence to a standard steel substrate
D3715/D3715M Practice for QualityAssurance of Pressure-
or to other surfaces of interest for a pressure-sensitive label
Sensitive Tapes
stock.
D4332 Practice for Conditioning Containers, Packages, or
1.2 This test method provides a means of assessing the
Packaging Components for Testing
uniformityoftheadhesionofagiventypeofpressure-sensitive
E122 Practice for Calculating Sample Size to Estimate,With
label stock. The assessment may be within a sheet or roll,
Specified Precision, the Average for a Characteristic of a
between sheets or rolls, or between production lots.
Lot or Process
1.3 Variations in the label stock facestock and adhesive can
3. Terminology
affect the response; therefore, this test method cannot be used
to pinpoint the specific cause(s) of nonuniformity. 3.1 Definitions—Definitions of terms used in this test
method are in accordance with Terminology D996.
1.4 This test method may not be appropriate to test label
stocks having either stiff backings or backings showing a high 3.2 Definitions of Terms Specific to This Standard:
stretch at low forces. These characteristics could result in a 3.2.1 pressure-sensitive label stock, n—the combination of
high variability of the test response, which is not a true facestock (face material), pressure-sensitive adhesive, and
indication of the real nature of the adhesive bond. release liner.
1.5 The values stated in either SI or inch-pound units are to
4. Summary of Test Method
be regarded separately as the standard. The values stated in
4.1 Astrip of label stock is applied to a standard test panel,
each system may not be exact equivalents; therefore, each
or other surface of interest, with controlled pressure. The label
system must be used independently, without combining values
stock is peeled from the panel at 90° angle at a specified rate,
in any way.
during which time the force required to effect peeling is
1.6 This standard does not purport to address all of the
measured.
safety concerns, if any, associated with its use. It is the
NOTE 1—The pressure-sensitive adhesive (psa) is permanently tacky
responsibility of the user of this standard to establish appro-
and instantly adheres to the surface for which the label stock is designed.
priate safety and health practices and determine the applica-
A psa label stock also can be defined as a self-adhering label stock.
bility of regulatory limitations prior to use.
5. Significance and Use
2. Referenced Documents
5.1 This test method is a tool for quality assurance use.
2.1 ASTM Standards:
Given a pressure-sensitive label stock and a requirement in
terms of the minimum or maximum peel adhesion value
expected for this label stock, the data from the test can be used
This test method is under the jurisdiction of ASTM Committee D10 on
in conjunction with acceptance criteria.
Packaging and is the direct responsibility of Subcommittee D10.14 on Tape and
Labels.
5.2 This test method can show the relative bond strength of
Current edition approved April 1, 2011. Published April 2011. Originally
a given label stock to one or more surfaces of varied material
approved in 1998. Last previous edition approved in 2004 as D6252/D6252M - 98
(2004). DOI: 10.1520/D6252_D6252M-98R11.
and texture as compared to the standard stainless steel panel.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Substitution of panels representative of the proposed substrates
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
for the standard stainless steel panel would be acceptable for
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. this procedure.
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D6252/D6252M − 98 (Reapproved 2011)
6. Apparatus 7. Reagents and Materials
6.1 Specimen Cutter —The specimen cutter shall hold two 7.1 Purity of Reagents—Reagent grade chemicals shall be
used in all tests. Unless otherwise indicated, it is intended that
single-edged razor blades in parallel planes, a precise distance
apart, to form a cutter of exact specimen width. all reagents conform to the specifications of the Committee on
Analytical Reagents of theAmerican Chemical Society, where
NOTE 2—A25.4-mm or 1-in. cutter shall consist of a 25.4-mm or 1-in.
such specifications are available. Other grades may be used,
thick by 200-mm or 8-in. length of aluminum bar stock 25.4 mm or 1 in.
provided it is first ascertained that the reagent is of sufficiently
wide. The edges for about 125 mm or 5 in. from one end shall be slightly
rounded to form a handle. The width of the bar for 75 mm or 3 in. from
high purity to permit its use without lessening the accuracy of
the opposite end shall be narrowed to exactly 25.4 mm or 1 in. minus the
the determination.
thickness of a single-edged razor blade (one of two used as cutting edges).
7.2 Solvents:
The razor blades shall be held in position using side plates.The end of the
cutter shall be cut away at 0.74 Rad or 45° angle to expose the cutting
7.2.1 Diacetone Alcohol, non-residual, technical grade or
edge at one end of the blades.
better.
7.2.2 One of the following:
6.2 Dispensing System for Solvents—Use plastic wash
7.2.2.1 Acetone.
bottles.
7.2.2.2 Ethyl Acetate.
6.3 Panel —A50by125-mmnolessthan1.1-mmthickness
7.2.2.3 Isopropyl Alcohol (IPA).
ora2by 5-in. panel no less than 0.043-in. thickness stainless
7.2.2.4 Methyl Alcohol, (95 %).
steel 302 or 304 in accordance with Specification A666 having
7.2.2.5 Methyl Ethyl Ketone (MEK).
a bright-annealed finish. The surface roughness height shall be
7.2.2.6 Methyl Isobutyl Ketone (MIBK).
50 6 5-nm or 2.0 6 0.2-uin. arithmetical average deviation
7.2.2.7 n-Heptane.
from the mean line. Panels showing stains, discoloration, or
7.2.3 Where toxicity and flammability requirements are
numerous scratches are not acceptable.
paramount, a mixture of n-heptane and a fluorinated hydrocar-
6.4 Roller , mechanically-operated.
bon, such as refrigerant, may meet the requirements. Normally,
6.4.1 A steel roller 85 6 2.5 mm or 3.25 6 0.1 in. in
cleaning procedures, including use of the solvents in 7.2,
diameterand45 61.5mmor1.75 60.05in.inwidth,covered
cannot be used on porous or solvent-sensitive materials.
by rubber approximately 6.5 mm or 0.25 in. in thickness,
7.3 Cleaning Material, absorbent, either surgical gauze or
having a Shore Scale A durometer hardness of 80 6 5. The
tissue. To be suitable, materials must be lint-free during use,
surface shall be a true cylinder void of any convex or concave
absorbent, contain no additives that are soluble in the solvents
deviations. The mass of the roller shall be 2040 645gor4.5
listed in 7.2, and be made without contaminants.
6 0.1 lb.
6.4.2 No part of the apparatus shall increase the mass of the
8. Sampling
rollerduringuse.Therollershallmovemechanicallyattherate
8.1 Sampling for rolls shall be in accordance with Practice
of 5.0 6 0.2 mm/s or 12.0 6 0.5 in./min.
D3715/D3715M and for sheet stock in a
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