ASTM D6252/D6252M-98(2004)
(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 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 spearately 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
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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 2004)
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 for Annealed or Cold-Worked Auste-
nitic 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 Quality Assurance of
or to other surfaces of interest for a pressure-sensitive label
Pressure-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,
label stock. The assessment may be within a sheet or roll,
With Specified Precision, the Average for a Characteristic
between sheets or rolls, or between production lots.
of a Lot or Process
1.3 Variations in the label stock facestock and adhesive can
affect the response; therefore, this test method cannot be used
3. Terminology
to pinpoint the specific cause(s) of nonuniformity.
3.1 Definitions—Definitions of terms used in this test
1.4 This test method may not be appropriate to test label
method are in accordance with Terminology D996.
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
be regarded separately as the standard. The values stated in
4. Summary of Test Method
each system may not be exact equivalents; therefore, each
4.1 Astrip of label stock is applied to a standard test panel,
system must be used independently, without combining values
or other surface of interest, with controlled pressure. The label
in any way.
stock is peeled from the panel at 90° angle at a specified rate,
1.6 This standard does not purport to address all of the
during which time the force required to effect peeling is
safety concerns, if any, associated with its use. It is the
measured.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
NOTE 1—The pressure-sensitive adhesive (psa) is permanently tacky
and instantly adheres to the surface for which the label stock is designed.
bility of regulatory limitations prior to use.
A psa label stock also can be defined as a self-adhering label stock.
2. Referenced Documents
5. Significance and Use
2.1 ASTM Standards:
5.1 This test method is a tool for quality assurance use.
Given a pressure-sensitive label stock and a requirement in
This test method is under the jurisdiction of ASTM Committee D10 on
terms of the minimum or maximum peel adhesion value
Packaging and is the direct responsibility of Subcommittee D10.14 on Tape and
expected for this label stock, the data from the test can be used
Labels.
in conjunction with acceptance criteria.
Current edition approved April 10, 1998. Published September 1998. DOI:
10.1520/D6252_D6252M-98R04.
5.2 This test method can show the relative bond strength of
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
a given label stock to one or more surfaces of varied material
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
and texture as compared to the standard stainless steel panel.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D6252/D6252M – 98 (2004)
Substitution of panels representative of the proposed substrates within 20 % of the scale maximum.An autographic device for
for the standard stainless steel panel would be acceptable for recording peel force shall be provided. Capability of intergrat-
this procedure. ing areas under the peel force recordings shall be optional.
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
single-edged razor blades in parallel planes, a precise distance used in all tests. Unless otherwise indicated, it is intended that
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
7.2.1 Diacetone Alcohol, non-residual, technical grade or
cutter shall be cut away at 0.74 Rad or 45° angle to expose the cutting
better.
edge at one end of the blades.
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 —A 50 by 125-mm no less than 1.1-mm thick-
7.2.2.3 Isopropyl Alcohol (IPA).
ness ora2by 5-in. panel no less than 0.043-in. thickness
7.2.2.4 Methyl Alcohol, (95 %).
stainless steel 302 or 304 in accordance with Specification
7.2.2.5 Methyl Ethyl Ketone (MEK).
A666 having a bright-annealed finish. The surface roughness
7.2.2.6 Methyl Isobutyl Ketone (MIBK).
height shall be 50 6 5-nm or 2.0 6 0.2-uin. arithmetical
7.2.2.7 n-Heptane.
average deviation from the mean line. Panels showing stains,
7.2.3 Where toxicity and flammability requirements are
discoloration, or 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.
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