ASTM C906-95

Standard Test Method for T-Peel Strength of Hot Applied Sealants

SCOPE
1.1 This test method covers a laboratory procedure for determining the peel strength of a hot-applied sealant, hereafter referred to as the sealant, when installed between flexible metal substrates of a T-type configuration. It also provides information on the adhesion of the sealant to the tested substrates.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are provided for information only.
1.3 The committee having jurisdiction for this specification 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.

General Information

• Status: Historical
• Publication Date: 09-Dec-2000
• ICS: 91.100.50 - Binders. Sealing materials
• Technical Committee: C24 - Building Seals and Sealants
• Drafting Committee: C24.20 - General Test Methods

Relations

• Replaced By: ASTM C906-00 - Standard Test Method for T-Peel Strength of Hot Applied Sealants (Withdrawn 2006)
• Effective Date: 10-Dec-2000

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: C 906 – 95
Standard Test Method for
T-Peel Strength of Hot Applied Sealants
This standard is issued under the fixed designation C 906; 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
1.1 This test method covers a laboratory procedure for
determining the peel strength of a hot-applied sealant, hereafter
referred to as the sealant, when installed between flexible metal
substrates of a T-type configuration. It also provides informa-
tion on the adhesion of the sealant to the tested substrates.
1.2 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are provided 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 appro-
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
METRIC EQUIVALENTS
2. Referenced Documents
in. 1 3 6 9 12
mm 25 76 152 229 305
2.1 ASTM Standards:
FIG. 1 Test Panel and Test Specimen
C 717 Terminology of Building Seals and Sealants
molten sealants and capable of delivering the required amount
3. Terminology
of 6.5 by 279.4 mm ( ⁄4 by 11 in.) at the specified application
3.1 Definitions—See Terminology C 717 for definitions of
temperature.
the following terms used in this standard: adhesive failure,
4.2 Heated Press, capable of compressing six 25.4 by 304.8
cohesive failure, hot applied sealant, sealant, and substrate.
mm (1 by 12 in.) strips of aluminum specimens to a fixed stop.
3.2 Descriptions of Terms Specific to This Standard:
4.3 Silicone Release Paper.
3.2.1 flexible—indicates that the substrates shall have such
4.4 Hot Knife.
dimensions and physical properties as to permit bending them
4.5 Tension Testing Machine, capable of applying a tensile
through any angle up to 90° without breaking or cracking.
load having the conditions prescribed in 4.5.1-4.5.5.
3.2.2 specified temperature—application temperature speci-
4.5.1 The machine and loading range shall be so selected
fied by the sealant manufacturer.
that the maximum load on the specimen falls between 15 and
3.2.3 T-peel strength—the average load per unit width
85 % of the upper limit of the loading range.
required to produce progressive separation of two bonded
4.5.2 The rate of movement between heads shall be 254
flexible substrates under conditions designated in this test
mm/min (10 in./min).
method.
NOTE 1—It is difficult to meet this requirement when loads are
4. Apparatus
measured with a spring-type or pendulum-type weighing device.
4.1 Any Extrusion Apparatus , used to mechanically apply
4.5.3 The machine shall be equipped with suitable grips
capable of clamping the specimens firmly and without slippage
throughout the tests.
This test method is under the jurisdiction of ASTM Committee C-24 on
4.5.4 The machine shall be autographic, giving a chart that
Building Seals and Sealants and is the direct responsibility of Subcommittee C24.15
can be read in terms of inches of separation as one coordinate
on Hot Applied Sealants.
Current edition approved Sept. 10, 1995. Published November 1995. Originally
and applied load as the other coordinate.
published as C 906 – 90. Last previous edition C 906 – 90.
Annual Book of ASTM Standards, Vol 04.07.
3 4
The following devices have been found suitable for this purpose: Hardman PSA A tension testing machine such as those available from Instron, 1580 Akron
gun, available from Hardman, Inc., Belleville, NJ 07190; heated extruders, available Penninsula Rd., Akron, OH 44313 or from Monsanto Chemical Company, 2689
from various manufacturers; and the Pyles Bulk Melters, available from Pyles Wingate Ave., Akron, OH 44314, or an equivalent, has been found suitable for this
Industries, 28990 Wixom Rd., Wixom, MI 48096. purpose.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
C 906
NOTE 4—This speed will cause separation of the bond at a rate of 127
4.5.5 The applied tension as measured and recorded shall be
mm (5 in.) per min.
accurate within 61%.
4.6 Room or Desiccators, capable of maintaining a relative
8.2 During the peel test, make an autographic recording of
humidity of 50 6 5 % at 23 6 2°C (73.4 6 3.6°F).
load versus head movement or load versus distance peeled.
8.3 Determine the peel strength over at least a 279.4 mm (11
NOTE 2—A saturated solution of calcium nitrate will provide approxi-
mately a 51 % relative humidity at the testing temperature. in.) length of bond line after the initial peak. Ignore the first and
last 25.4 mm (1 in.) of sample.
4.7 Aluminum Alloy Strips, 12 required, measuring 25.4 by
304.8 by 0.635 mm (1 by 12 by 0.025 in.). Alloy #5052-H32.
9. Calculation
4.8 Planimeter, recommended, but optional.
9.1 Disregard the first and last 25.4 mm (1 in.) and deter-
5. Sampling
mine from the autographic curve for 228.6 mm (9 in.) of
5.1 Sealant shall be free of external surface contaminants
peeling after the initial peak the average peeling load in lb/in.
such as talc, oil, dust, and moisture. Handling of the sealant of the specimen width required to separate the adherents. It is
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