ASTM D6195-97
(Test Method)Standard Test Methods for Loop Tack
Standard Test Methods for Loop Tack
SCOPE
1.1 These test methods cover the determination of properties of a pressure-sensitive adhesive. This test method is applicable to those adhesives that form a bond of measurable strength rapidly upon contact with another surface. Tack force may be measured as the force required to separate the adhesive from the adhered at the interface shortly after they have been brought into contact under a load equal only to the weight of the pressure-sensitive article (for example, tape, label, sticker, etc.) on a 1 in. contact area.
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 6195 – 97
Standard Test Methods for
Loop Tack
This standard is issued under the fixed designation D 6195; 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 2.2 European Association for the Pre-Adhesed Labeling
Industry (FINAT) Standard:
1.1 These test methods cover the determination of proper-
FTM 9 “Quick-Stick” Tack Measurement
ties of a pressure-sensitive adhesive. This test method is
2.3 Tag and Label Manufacturers Institute, Inc. (TLMI)
applicable to those adhesives that form a bond of measurable
Standard:
strength rapidly upon contact with another surface. Tack force
L-IB1 TLMI Loop Tack Test
may be measured as the force required to separate the adhesive
L-IB2 Tensile Tester Loop Tack Test
from the adherend at the interface shortly after they have been
brought into contact under a load equal only to the weight of
3. Terminology
the pressure-sensitive article (for example, tape, label, sticker,
3.1 Definitions:
etc.) ona1in. contact area.
3.1.1 Many of the terms found in this test method are
1.2 The following test methods are included:
defined in Terminology D 907.
1.2.1 Test Method A (using Tensile Tester), and
1.2.2 Test Method B (using Loop Tack Tester).
4. Summary of Test Method
1.3 The values stated in inch-pound units are to be regarded
4.1 These test methods involve allowing a loop of pressure-
as the standard. The values given in parentheses are for
sensitive adhesive with its backing to be brought into con-
information purposes only.
trolled contact witha1in. (25 by 25 mm) surface of stainless
1.4 This standard does not purport to address all of the
steel, with the only force applied being the weight of the
safety concerns, if any, associated with its use. It is the
pressure-sensitive article itself. The pressure-sensitive article is
responsibility of the user of this standard to establish appro-
then removed from the substrate, with the force to remove the
priate safety and health practices and determine the applica-
pressure-sensitive article from the adherend measured by a
bility of regulatory limitations prior to use.
recording instrument.
2. Referenced Documents 4.2 Test Method A (using a Tensile Tester) applies when a
Tensile Tester is used to measure loop tack and involves the use
2.1 ASTM Standards:
of a loop prepared from an 7 in. (175 mm) specimen strip.
A 666 Specification for Annealed or Cold-Worked Austen-
2 4.3 Test Method B (using a Loop Tack Tester) applies when
itic Stainless Steel, Sheet, Strip, Plate, and Flat Bar
3 a Loop Tack Tester is used to measure loop tack and involves
D 907 Terminology of Adhesives
the use of a loop prepared from a 5 in. (125 mm) specimen
D 2651 Guide for Preparation of Metal Surfaces for Adhe-
3 strip.
sive Bonding
E 171 Specification for Standard Atmospheres for Condi-
5. Significance and Use
tioning and Testing Flexible Barrier Materials
5.1 These test methods provide a quantitative measure of
E 177 Practice for Use of the Terms Precision and Bias in
5 the pressure-sensitive tack property of an adhesive.
ASTM Test Methods
5.2 These test methods are designed to measure the tack
E 691 Practice for Conducting an Interlaboratory Study to
5 property of the adhesive mass. The tack of a given adhesive
Determine the Precision of a Test Method
varies depending on the backing (generally, stiffer backings
lead to higher values).
5.3 Theses test methods are suitable for quality control and
This test method is under the jurisdiction of ASTM Committee D-14 on
Adhesives and is the direct responsibility of Subcommittee D14.50 on Hot Melt and
research purposes.
Pressure Sensitive Adhesives.
Current edition approved November 10, 1997. Published May 1998.
Annual Book of ASTM Standards, Vol 01.03.
3 6
Annual Book of ASTM Standards, Vol 15.06. Available from FINAT, Laan Copes Van Cattenburch 79, 2585 EW, The Hague,
Annual Book of ASTM Standards, Vol 15.09. Holland.
5 7
Annual Book of ASTM Standards, Vol 14.02. Available from TLMI, 40 Shuman Blvd., Ste. 295, Naperville, IL 60563.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
D6195–97
5.4 Test Method A (using Tensile Tester) makes use of a
specimen strip 7 in. (175 mm) in length. Both the FINAT FTM
9 “Quick Stick” Tack Measurement Test and the TLMI L-IB2
Tensile Tester Loop Tack Test also use a specimen strip of that
length.
5.5 Test Method B (using Loop Tack Tester) makes use of a
specimen strip five in. (125 mm) in length. That is the only
FIG. 2 Loop Tack Test Fixture 2
length specimen strip that fits properly in the loop tack tester.
5.6 If the adhesive is not already otherwise coated, these test
methods incorporate the use of a clear 2 mil (0.05 mm)
7. Sample Preparation
polyester (PET) film backing for specimen preparation. Use of
other backing materials changes performance of the specimen 7.1 Cut sample into 1 by 7 in. (25 by 175 mm) specimen
to be tested. strips in the machine direction (when known) of the pressure-
sensitive article. Use of strips of other lengths may change
TEST METHOD A (Using a Tensile Tester)
results. Cut at least three specimen strips for each adhesive to
be tested.
6. Apparatus
NOTE 1—If transfer or unsupported adhesives are to be tested, these are
6.1 Tensile Tester—A constant rate of extension type.
to be laminated to 2 mil (0.05 mm) PET film, used as an adhesive support,
6.2 Test Fixture (Fig. 1 or Fig. 2 )—To be mounted into the
prior to cutting the samples into the 1 by 7 in. (25 by 175 mm) specimen
jaws of the tensile tester. A panel held by the test fixture allows
strips.
for a 1 in. (25 by 25 mm) contact area of the pressure-sensitive
7.2 Condition specimens to be tested for at least 24 h in a
article. Alternately, the test fixture may include a raised area
2 testing room at 73.4 6 3.6°F (23 6 2°C) and a relative
that allowsa1in. (25 by 25 mm) contact area of the
humidity of 50 6 5 %, in accordance with Specification E 171,
pressure-sensitive article.
prior to conducting the test.
6.2.1 The panel or the raised area of the test fixture is
stainless steel as specified in Specification A 666.
8. Conditioning
6.3 Apparatus for Cutting:
8.1 Testing Room—Test in a standard laboratory atmo-
6.3.1 Die Cutter—A 1 by 7 in. (25 by 175 mm) rectangular
sphere, at 73.4 6 3.6°F (23 6 2°C) and a relative humidity of
mallet-type die cutter with mallet for sample preparation.
50 6 5 %, in accordance with Specification E 171.
6.3.2 If a fixed dimension die is unavailable, substitute a
1-in. (25-mm) steel bar with a double razor knife or other
9. Procedure
apparatus suitable for cutting the specimen into the specified
9.1 Ensure that the tensile tester is calibrated according to
dimensions to prepare the 1 in. (25 mm) wide specimen strips.
6.4 Absorbent Lint-Free Cleaning Material—Materials pro- instructions supplied by the manufacturer.
9.2 Set the instrument crosshead speed at 12 in. (300
duced from entirely virgin raw materials and containing less
than 0.25 % by weight of solvent-leechable materials. mm)/min.
9.3 Place the test fixture in the lower grip of the tensile
6.5 Masking Tape—1 in. (25 mm) wide.
6.6 2 mil (0.05 mm) PET Film—To be used as a support tester. It is important that the test fixture be level and straight
in the lower grip. See Fig. 1, Fig. 2 and Fig. 3.
medium in evaluating unsupported adhesives such as transfer
tapes, laminating adhesives, or other free-film adhesives. 9.4 Set gaps for the crosshead using the minimum and
maximum gap setting on the extension cycle. Set gaps 1 6 0.05
6.7 Reagents—Appropriate reagents include acetone, diac-
etone alcohol, n-heptane and toluene, reagent or analytical in. (256 1 mm) (critical) and 4 6 0.1 in. (100 6 3 mm)
(optional) from the bottom of the upper grips to the face of the
grade, or an ethanol cleaner for water-based adhesives.
stainless steel portion of the test fixture when the test fixture is
Available from Chem Instruments, 510 Commercial Drive, Fairfield, OH
45014-7593.
FIG. 1 Loop Tack Test Fixture 1 FIG. 3 Loop Tack Sample During Test
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
D6195–97
locked in the lower grips. Set the chart recorder speed for 2 in. 9.12 Repeat procedure (9.5 to 9.11.1) at least two additional
(50 mm)/min. Set the chart recorder load scale to 20 lb (90 N) times for each adhesive to be tested (for a minimum of three
full scale. replicates). Use a fresh specimen strip for each test.
9.13 When testing is complete, clean the stainless steel
9.5 Clean the stainless steel portion of the test fixture (the
portion of the test fixture with approved reagent. Cover with
area the pressure-sensitive article will contact) prior to use
masking tape when not in use to protect the surface from
using reagent(s) from 6.7. Use absorbent, lint-free cleaning
scratches.
material. Use a separate piece of cleaning material each time.
Repeat for a total of three washes after the test fixture appears
TEST METHOD B (Using a Loop Tack Tester)
clean. Allow 2 min to elapse after cleaning to ensure complete
evaporation of the cleaning solvent. The user must ensure that
10. Apparatus
the cleaning method used removes all residue from the test
fixture. The water-break test, described in Guide D 2651, may
10.1 Loop Tack Tester (Fig. 5) , also used in TLMI Test
be used to verify cleanliness.
L-IB1.
9.6 Completely remove the release liner (if the pressure- 10.2 Stainless Steel Test Panels—1 in. (25 mm) by 6 in.
sensitive article normally includes a release liner) from the (150 mm), stainless steel as specified in Specification A 666.
specimen. 10.3 Apparatus for Cutting.
10.3.1 Die Cutter—A 1 by 5 in. (25 by 125 mm) rectangular
9.7 Bend the specimen completely back on itself, being
mallet-type die cutter with mallet for sample preparation.
careful not to crease it. The specimen forms a tear drop shaped
10.3.2 If a fixed dimension die is unavailable, substitute a 1
loop with the adhesive surface facing out.
in. (25-mm) steel bar with a double razor knife or other
9.8 Fasten the ends of the loop together, using a
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.