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ASTM D2979-01

(Test Method)

Standard Test Method for Pressure-Sensitive Tack of Adhesives Using an Inverted Probe Machine

Standard Test Method for Pressure-Sensitive Tack of Adhesives Using an Inverted Probe Machine

SIGNIFICANCE AND USE
This test method provides a quantitative measure of the pressure-sensitive tack of the adhesive.
The method is designed for the adhesive mass itself and is suitable for measuring the tack of pressure-sensitive adhesives for use on both rigid and flexible backings.
This test method is suitable for quality control and research purposes.
SCOPE
1.1 This test method covers measurement of the pressure-sensitive tack of adhesives. This test method is applicable to those adhesives which form a bond of measurable strength rapidly upon contact with another surface and which can be removed from that surface cleanly, that is, without leaving a residue visible to the eye. For such adhesives, tack may be measured as the force required to separate an adhesive and the adherend at the interface shortly after they have been brought into contact under a defined load of known duration at a specified temperature.
1.2 The values stated in SI units are to be regarded as the standard.
1.3  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
09-Oct-2001
ICS
83.180 - Adhesives
Technical Committee
D10 - Packaging
Drafting Committee
D10.14 - Tape and Labels
Current Stage
Ref Project

Relations

Replaces
ASTM D2979-00 - Standard Test Method for Pressure-Sensitive Tack of Adhesives Using an Inverted Probe Machine
Effective Date
10-Oct-2001
Replaced By
ASTM D2979-01(2009) - Standard Test Method for Pressure-Sensitive Tack of Adhesives Using an Inverted Probe Machine
Effective Date
01-Apr-2009
Referred By
ASTM D6465-99(2016) - Standard Guide for Selecting Aerospace and General Purpose Adhesives and Sealants
Effective Date
10-Oct-2001

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ASTM D2979-01 - Standard Test Method for Pressure-Sensitive Tack of Adhesives Using an Inverted Probe MachineASTM D2979-01 - Standard Test Method for Pressure-Sensitive Tack of Adhesives Using an Inverted Probe Machine
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ASTM D2979-01 - Standard Test Method for Pressure-Sensitive Tack of Adhesives Using an Inverted Probe Machine
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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:D2979–01
Standard Test Method for
Pressure-Sensitive Tack of Adhesives Using an Inverted
1
Probe Machine
This standard is issued under the fixed designation D2979; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope time, at a given temperature; and subsequently breaking the
bond formed between the probe and adhesive, also at a
1.1 This test method covers measurement of the pressure-
controlled rate. Tack is measured as the maximum force
sensitive tack of adhesives. This test method is applicable to
required in breaking the adhesive bond.
those adhesives which form a bond of measurable strength
rapidly upon contact with another surface and which can be
5. Significance and Use
removed from that surface cleanly, that is, without leaving a
5.1 This test method provides a quantitative measure of the
residue visible to the eye. For such adhesives, tack may be
pressure-sensitive tack of the adhesive.
measured as the force required to separate an adhesive and the
5.2 The method is designed for the adhesive mass itself and
adherend at the interface shortly after they have been brought
is suitable for measuring the tack of pressure-sensitive adhe-
into contact under a defined load of known duration at a
sives for use on both rigid and flexible backings.
specified temperature.
5.3 This test method is suitable for quality control and
1.2 The values stated in SI units are to be regarded as the
research purposes.
standard. The values given in parentheses are for information
only.
6. Apparatus
1.3 This standard does not purport to address all of the
6.1 Probe—A Type 304 stainless steel rod, 5.0 mm (0.197
safety concerns, if any, associated with its use. It is the
in.)indiameter,machinedatoneendof90°tothelongitudinal
responsibility of the user of this standard to establish appro-
axis.Thetipisfinishedtoasurfaceroughnessofnotmorethan
priate safety and health practices and determine the applica-
500 or less than 250 nm (20 to 10 µin.) rms as measured by a
bility of regulatory limitations prior to use.
5
surface-measuring device.
2. Referenced Documents
NOTE 1—When the adhesive is supported on flexible backings, or is
2.1 ASTM Standards: greater than 0.25 mm (0.010 in.) thick, a probe with a spherical crown of
2
0.05 mm (0.002 in.) high, and with a 62.5-mm (2.5-in.) radius may be
D907 Terminology of Adhesives
3 used.
E4 Practices for Force Verification of Testing Machines
E171 Specification for Standard Atmospheres for Condi- 6.2 Pressure-Loading Weight—An annular ring whose in-
4
tioning and Testing Flexible Barrier Materials
side diameter is slightly larger than the probe diameter. The
ring weight is such that the pressure applied to the sample is
3. Terminology
9.79 6 0.10 kPa (1.42 psi).
3.1 Definitions—Manytermsinthistestmethodaredefined
NOTE 2—Contact pressures of 0.98, 1.96, or 4.90 kPa (0.14, 0.28 or
in Terminology D907.
0.71 psi) may be obtained by employing annuli of different weight.These
lower pressures as well as ones of 98 kPa (14.2 psi) or higher can be used
4. Summary of Test Method
to show the effect of pressure directly when tack is pressure-dependent.
4.1 This test method involves bringing the tip of a cleaned
6.3 Force Gage—A spring device with an indicator that
probe of defined surface roughness into contact with the
retains the maximum force reading until reset manually. The
adhesiveatacontrolledrate,underafixedpressure,forashort
spring characteristics is such that between 8.9 and 22.2 N (2
and5lb)arerequiredtoextenditthepermissible2.5mm(0.10
in.). Mount the probe directly on the force gage.
1
This test method is under the jurisdiction of ASTM Committee D14 on
AdhesivesandisthedirectresponsibilityofSubcommitteeD14.50onHotMeltand
NOTE 3—Other force-measuring devices such as strain gage load cells,
Pressure Sensitive Adhesives.
or devices with different force-deflection characteristics may be used in
Current edition approved Oct. 10, 2001. Published December 2001. Originally
published as D2979–71. Last previous edition D2979–00.
2
Annual Book of ASTM Standards, Vol 15.06.
3 5
Annual Book of ASTM Standards, Vol 03.01. An example of a suitable surface-measuring device is a Surfindicator manu-
4
Annual Book of ASTM Standards, Vol 15.09. factured by Gould, Inc., Gage and Control Div., 4601 Arden Dr., El Monte, CA.
Copyright ©ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA19428-2959, United States.
1

---------------------- Page: 1 ----------------------
D2979
certain instances. Tack values obtained with these devices will differ in NOTE 6—The proper relation of the su
...

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5.1 These test methods provide a quantitative measure of the pressure-sensitive tack property of an adhesive.
FIG. 1 Loop Tack Test Fixture 1  
FIG. 2 Loop Tack Test Fixture 2  
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SCOPE
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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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