ASTM C907-03
(Test Method)Standard Test Method for Tensile Adhesive Strength of Preformed Tape Sealants by Disk Method
Standard Test Method for Tensile Adhesive Strength of Preformed Tape Sealants by Disk Method
SIGNIFICANCE AND USE
Preformed tape sealants are tacky, deformable solids, that are used under compression between two or more substrates, in various sealing applications where the surfaces may be of similar or dissimilar materials. This procedure measures the tensile strength of the preformed tape sealant. It also provides an indication of the cohesive nature and adhesive bonding properties of the preformed tape sealant. This procedure is not intended to simulate actual use conditions.
SCOPE
1.1 This test method covers a laboratory procedure for determining the tensile adhesive strength of a preformed tape sealant. The type of failure can be determined, and the degree of cohesive/adhesive failure can be estimated.
1.2 The values stated in metric (SI) units are to be regarded as the standard. The values given in parentheses are provided for information purposes only.
1.3 The subcommittee with jurisdiction is not aware of any similar ISO standard.
1.4 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:C907–03
Standard Test Method for
Tensile Adhesive Strength of Preformed Tape Sealants by
1
Disk Method
This standard is issued under the fixed designation C 907; 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 strates, in various sealing applications where the surfaces may
be of similar or dissimilar materials. This procedure measures
1.1 This test method covers a laboratory procedure for
the tensile strength of the preformed tape sealant. It also
determining the tensile adhesive strength of a preformed tape
provides an indication of the cohesive nature and adhesive
sealant. The type of failure can be determined, and the degree
bonding properties of the preformed tape sealant. This proce-
of cohesive/adhesive failure can be estimated.
dure is not intended to simulate actual use conditions.
1.2 The values stated in metric (SI) units are to be regarded
as the standard. The values given in parentheses are provided
6. Apparatus and Accessory Materials
for information purposes only.
6.1 Test Fixture, fabricated of aluminum (mill finish), in
1.3 The subcommittee with jurisdiction is not aware of any
accordance with Fig. 1.
similar ISO standard.
1.4 This standard does not purport to address all of the
NOTE 1—Other substrates may be substituted in 6.1.
safety concerns, if any, associated with its use. It is the
6.2 Tensile Testing Machine, or equivalent, with a jaw
responsibility of the user of this standard to establish appro-
separation rate of 51 mm (2 in.)/min.
priate safety and health practices and determine the applica-
6.3 Auxiliary Hardware, for attachment of the test fixture to
bility of regulatory limitations prior to use.
the tensile tester.
6.4 Knife.
2. Referenced Documents
6.5 Compression Device, such as a vise, press, or equiva-
2.1 ASTM Standards:
lent.
2
C 717 Terminology of Building Seals and Sealants
6.6 Device, for recording the tension load in newtons (or
pounds-force).
3. Terminology
6.7 Solvent, such as xylol or toluol.
3.1 Definitions—Thedefinitionsofthefollowingtermsused
6.8 Wiping Cloths, lint-free.
in this test method are found in Terminology C 717: adhesive
failure; cohesive failure; preformed tape sealant; sealant; and
7. Sampling
substrate.
7.1 Samples to be tested shall be taken from a fresh roll of
preformed tape sealant after first removing and discarding the
4. Summary of Test Method
first 600 mm (2 ft) of the roll.
4.1 The preformed tape sealant is compressed between two
7.2 Conditionthesampleat23 62°C(73.4 63.6°F)and50
aluminum disks. The disks are pulled apart in a tensile tester to
6 10 % relative humidity for a minimum of 24 h before
failure. The maximum tensile strength and failure mode are
preparing the test specimens.
recorded.
8. Test Specimens
5. Significance and Use
8.1 Prepare two test specimens as follows:
5.1 Preformed tape sealants are tacky, deformable solids,
8.1.1 Clean the surface of the test fixture with clean solvent
that are used under compression between two or more sub-
to remove grease, oil, or residue from previous test, and dry.
8.1.2 Set the allen screw stop so that when the disks are
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assembled and the dowel is seated against it, the distance
ThistestmethodisunderthejurisdictionofASTMCommitteeC24onBuilding
Seals and Sealants and is the direct responsibility of Subcommittee C24.30 on
between the parallel disk surfaces is 3.2 mm (0.125 in.).
Adhesion.
8.1.3 Place sufficient preformed tape sealant on the face of
Current edition approved May 10, 2003. Published June 2003. Originally
the fixture so that when mated with the matching face, the
approved in 1979. Last previous edition approved in 1998 as C 907 – 98.
2
Annual Book of ASTM Standards, Vol 04.07. entire 3.2-mm (0.125-in.) gap will be filled.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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C907–03
10. Procedure
10.1 Activate the tensile testing machine for recording the
force required to pull the specimen apart.
10.2 Attach the test fixture to the jaws of the tensile testing
machine, taking care to align them vertically, and separate at a
crosshead speed of 51 mm (2 in.)/min until failure occurs. The
test temperature shall be 23 6 2°C (73.4 6 3.6°F). (Other
conditions may be used.)
10.3 Record the peak stress load in newtons (or pounds
force).
10.4 Visually inspect and record the mode of preformed
tape sealant failure, cohesive or adhesive and the appropriate
percentage of each type of failure.
11. Calculation
11.1 For each specimen, calculate the maximu
...
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