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ASTM D3121-05

(Test Method)

Standard Test Method for Tack of Pressure-Sensitive Adhesives by Rolling Ball

Standard Test Method for Tack of Pressure-Sensitive Adhesives by Rolling Ball

SCOPE
1.1 This test method covers measurement of the comparative tack of pressure-sensitive adhesives by a rolling ball and is most appropriate for low-tack adhesives. This test method is only one of several available for the measurement of tack.
1.1.1 This test method is not recommended for the specification of end use products.
1.2 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 exact equivalents, therefore, each system must be used independently without combining values in any way.
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

Status
Historical
Publication Date
30-Sep-2005
ICS
83.180 - Adhesives
Technical Committee
D10 - Packaging
Drafting Committee
D10.14 - Tape and Labels
Current Stage
Ref Project

Relations

Replaces
ASTM D3121-94(1999) - Standard Test Method for Tack of Pressure-Sensitive Adhesives by Rolling Ball
Effective Date
01-Oct-2005
Replaced By
ASTM D3121-06 - Standard Test Method for Tack of Pressure-Sensitive Adhesives by Rolling Ball (Withdrawn 2015)
Effective Date
01-Mar-2006
Referred By
ASTM D6123/D6123M-97(2020) - Standard Specification for Pressure-Sensitive Tape for Light-Duty Packaging and General Purpose Masking
Effective Date
01-Oct-2005
Referred By
ASTM D6465-99(2016) - Standard Guide for Selecting Aerospace and General Purpose Adhesives and Sealants
Effective Date
01-Oct-2005

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ASTM D3121-05 - Standard Test Method for Tack of Pressure-Sensitive Adhesives by Rolling BallASTM D3121-05 - Standard Test Method for Tack of Pressure-Sensitive Adhesives by Rolling Ball
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ASTM D3121-05 - Standard Test Method for Tack of Pressure-Sensitive Adhesives by Rolling Ball
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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D3121–05
Standard Test Method for
1
Tack of Pressure-Sensitive Adhesives by Rolling Ball
This standard is issued under the fixed designation D 3121; 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.
1. Scope by measuring the distance that the ball travels across the
adhesive before stopping.There are two major retarding forces
1.1 This test method covers measurement of the compara-
applied by the adhesive to the ball: (1) the adhesion between
tive tack of pressure-sensitive adhesives by a rolling ball and is
the ball and the adhesive, often called “grab,” and (2) the
most appropriate for low-tack adhesives. This test method is
“plowing effect” or energy required to push the adhesive out of
only one of several available for the measurement of tack.
the ball’s path.
1.1.1 This test method is not recommended for the specifi-
4.2 Test results are influenced by ( 1) adhesive film thick-
cation of end use products.
ness, (2) bond of adhesive to backing, and (3) backing rigidity,
1.2 Values stated in either SI or inch-pound units are to be
so these factors must be carefully controlled for satisfactory
regarded separately as standard. The values stated in each
comparisons.
system may not be exact equivalents, therefore, each system
must be used independently without combining values in any
5. Significance and Use
way.
5.1 Therolling-balltacktestisfast,easytorun,andrequires
1.3 This standard does not purport to address all of the
little investment in equipment and little operator training. This
safety concerns, if any, associated with its use. It is the
test is intended primarily for quality control use since it
responsibility of the user of this standard to establish appro-
demonstrates good reproducibility within a single laboratory
priate safety and health practices and determine the applica-
and ability to detect batch-to-batch variations accurately if
bility of regulatory limitations prior to use.
adhesivefilmthicknessisheldconstant.Rollingballtackisnot
2. Referenced Documents intended as an investigative tool since for most pressure
2
sensitive adhesive applications rolling ball tack results do not
2.1 ASTM Standards:
correlate well with application tack requirements.
D 907 Terminology of Adhesives
E 171 Specification for Standard Atmospheres for Condi-
6. Apparatus (Fig. 1 and Fig. 2)
tioning and Testing Flexible Barrier Materials
6.1 Inclined Trough equipped with a release lever at the
D 5750/D 5750M Guide for Width and Length of Pressure-
3
top through which the ball gains downhill momentum. The
Sensitive Tape
7
ball is a 11 mm ( ⁄16 in.) diameter steel ball unless otherwise
3. Terminology specified.
3.1 Definitions—Many of the terms found in this test
7. Reagents
method are defined in Terminology D 907.
7.1 Purity of Reagents—Reagent grade chemicals should be
4. Summary of Test Method used in all tests. Other grades may be used, provided it is first
ascertained that the reagent is of sufficiently high purity to
4.1 In the determination of tack by the rolling-ball method,
permit its use without lessening accuracy of the determination.
a steel ball is released at the top of an incline, allowed to
7.2 Solvents:
accelerate down the incline and roll on to a horizontal surface
7.2.1 Any of the following solvents may be used for
covered with a pressure-sensitive adhesive. Tack is determined
cleaning:
7.2.1.1 Diactone alcohol non-residual, technical grade or
better,
1
This test method is under the jurisdiction of ASTM Committee D14 on
7.2.1.2 Methanol (95 %),
Adhesives and is the direct responsibility of Subcommittee D14.50 on Hot Melts,
7.2.1.3 Methyl ethyl ketone (MEK),
Pressure Sensitives, and Archival Adhesives.
7.2.1.4 n-Heptane, or
Current edition approved Oct. 1, 2005. Published November 2005. Originally
approved in 1973. Last previous edition approved in 1999 as D 3121 – 94 (1999).
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on AsuitableapparatusisavailablethroughChemInstruments,9349HamiltonDr.,
the ASTM website. Mentor OH 44060–4559.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
D3121–05
total of three washes. The final cleaning shall be with an
alternate solvent, either MEK or acetone. Do not touch cleaned
surfaces with fingers.The cleaned surface should be allowed to
dry at standard condi
...

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FIG. 2 Loop Tack Test Fixture 2  
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SCOPE
1.1 This specification covers film, paper, and cloth pressure-sensitive tapes used for box closure and sealing.  
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This specification covers paper-backed pressure sensitive tapes used for light-duty packaging and masking. The paper presents two types of pressure-sensitive tape: type I - crepe paper backed, and type II - flat paper backed. The materials used in the construction of the tape shall be such as to ensure conformance to the requirements specified. The tape shall comply with the physical requirements specified. Specimen preparation shall be as specified in the appropriate test method. Number of tests per unit of product shall be as specified in the appropriate test method. Accelerated aging, adhesion, tensile and elongation, tack, and thickness shall be tested to meet the requirements specified.
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4.2 It is recommended that this guide be referenced where widths and lengths of pressure-sensitive tapes are stated, such as in contracts, orders, advertisements, and labeling.
SCOPE
1.1 This guide provides guidelines for widths and lengths of pressure-sensitive tape, including tolerances and labeling in the inch-pound and SI systems. It is not intended for tapes used for medical, surgical, or label stock purposes.  
1.2 Units stated in the inch-pound system followed by a calculated unit in the SI system are to be regarded separately as standard and should not be interchangeable with units stated in the SI system. The units stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.  
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