ASTM D3808-01
(Test Method)Standard Test Method for Qualitative Determination of Adhesion of Adhesives to Substrates by Spot Adhesion
Standard Test Method for Qualitative Determination of Adhesion of Adhesives to Substrates by Spot Adhesion
SCOPE
1.1 This test method covers a simple qualitative procedure for quickly screening whether an adhesive will, under recommended application conditions, bond to a given substrate without actually making bonded assemblies.
1.2 The values stated in SI units are to be regarded as the standard. The values in parentheses are for information only.
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.
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Designation:D3808–01
Standard Test Method for
Qualitative Determination of Adhesion of Adhesives to
1
Substrates by Spot Adhesion
This standard is issued under the fixed designation D 3808; 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 4.3 The determination of whether an adhesive bonds to the
substrate is made by simply trying to pry the spot of adhesive
1.1 This test method covers a simple qualitative procedure
from the substrate.
for quickly screening whether an adhesive will, under recom-
4.4 The mode of failure is readily evident by examining
mended application conditions, bond to a given substrate
whether the bond separated adhesively or cohesively, either in
without actually making bonded assemblies.
the adhesive or substrate.
1.2 The values stated in SI units are to be regarded as the
standard. The values in parentheses are for information only.
5. Significance and Use
1.3 This standard does not purport to address all of the
5.1 This is a quick, simple, and inexpensive test method for
safety concerns, if any, associated with its use. It is the
qualitatively determining, without the need to prepare bonded
responsibility of the user of this standard to establish appro-
test specimens, whether the adhesive under consideration will
priate safety and health practices and determine the applica-
bond to a particular substrate. If the results are acceptable, then
bility of regulatory limitations prior to use.
standard quantitative adhesive test procedures can be used to
2. Referenced Documents obtain quantitative measurements of the adhesive’s perfor-
mance.
2.1 ASTM Standards:
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5.2 This test method can also be used to compare relative
D 907 Terminology of Adhesives
adhesion of several adhesives to given substrates.
E 171 Specification for Standard Atmospheres for Condi-
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5.3 It can be used to determine whether an adhesive will
tioning and Testing Flexible Barrier Materials
continuetoadheretothesubstrateunderspecifiedenvironmen-
3. Terminology
tal conditions.
5.4 It can be used to evaluate adhesion of a particular
3.1 Definitions—Many of the terms used in this test method
adhesive to a variety of substrates.
are defined in Terminology D 907.
5.5 It can be used to obtain “subjective” comparative data
3.1.1 spot adhesion, n—a qualitative method of determining
between several adhesives on a given substrate by noting the
adhesion by attempting to pry a “spot” of cured adhesive from
relative ease of inducing failure between the adhesives tested.
a substrate.
5.6 It should be most applicable to adhesives that cure or set
4. Summary of Test Method
when exposed to “air” (ambient, heated, etc.) and could be
used for anaerobic adhesives if testing is carried out in an
4.1 Spots of adhesive (size can vary, but generally about 6
1
oxygen-free atmosphere.
mm ( ⁄4 in.) in diameter) are placed onto a substrate using the
application procedure and curing conditions acceptable to both
6. Apparatus
user and supplier of the adhesive.
6.1 No special equipment is needed for application of the
4.2 The substrate preparation and environmental exposure
adhesive to the test substrate(s). When using hot-melt adhe-
of the spot of adhesive after cure or setting can be varied as
sives, for example, it would be desirable to have a hand-gun
desired.
applicator or equivalent apparatus to allow deposition of the
hot-meltatarecommendedapplicationtemperature.Theuseof
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This test method is under the jurisdiction of ASTM Committee D14 on
such equipment is not mandatory as a hot plate can be used to
AdhesivesandisthedirectresponsibilityofSubcommitteeD14.40onAdhesivesfor
melt a quantity of the hot melt to the application temperature in
Plastics.
a deformable container such as an aluminum weighing dish.
Current edition approved Oct. 10, 2001. Published December 2001. Originally
published as D 3808 – 79. Last previous edition D 3808 – 96.
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Annual Book of ASTM Standards, Vol 15.06.
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Annual Book of ASTM Standards, Vol 15.09.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D3808
Upon reaching proper temperature, the hot melt can be poured 9.2 The ease of separation of the adhesive spot can be used
onto the substrate after forming a pouring spout in the to compare the relative performance of the adhesives.
container.
10. Procedure
6.2 For some applications it is desirable to preheat the
10.1 Run the tests in the same environment used to condi-
substrate.Forthisreasonanovenorotherheatsourcewouldbe
tion the tes
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