ASTM D1876-00

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
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Designation: D 1876 – 00
Standard Test Method for
Peel Resistance of Adhesives (T-Peel Test)
This standard is issued under the fixed designation D 1876; 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.
This standard has been approved for use by agencies of the Department of Defense.
INTRODUCTION
The accuracy of the results of strength tests of adhesive bonds will depend on the conditions under
which the bonding process is carried out. Unless otherwise agreed upon by the manufacturer and the
purchaser, the bonding conditions shall be prescribed by the manufacturer of the adhesive. In order to
ensure that complete information is available to the individual conducting the tests, the manufacturer
of the adhesive shall furnish numerical values and other specific information for each of the following
variables:
(1) Procedure for preparation of the surfaces prior to application of the adhesive, the cleaning and
drying of metal surfaces, and special surface treatments such as sanding, which are not specifically
limited by the pertinent test method.
(2) Complete mixing directions for the adhesive.
(3) Conditions for application of the adhesive, including the rate of spread or thickness of film,
number of coats to be applied, whether to be applied to one or both surfaces, and the conditions of
drying where more than one coat is required.
(4) Assembly conditions before application of pressure, including the room temperature, length of
time, and whether open or closed assembly is to be used.
(5) Curing conditions, including the amount of pressure to be applied, the length of time under
pressure, and the temperature of the assembly when under pressure. It should be stated whether this
temperature is that of the glue line, or of the atmosphere at which the assembly is to be maintained.
(6) Conditioning procedure before testing, unless a standard procedure is specified, including the
length of time, temperature, and relative humidity.
A range may be prescribed for any variable by the manufacturer of the adhesive, if it can be assumed
by the test operator that any arbitrarily chosen value within such a range or any combination of such
values for several variables will be acceptable to both the manufacturer and the purchaser of the
adhesive.
1. Scope 2. Referenced Documents
1.1 This test method is primarily intended for determining 2.1 ASTM Standards:
the relative peel resistance of adhesive bonds between flexible B 209 Specification for Aluminum and Aluminum-Alloy
adherends by means of a T-type specimen. Sheet and Plate
1.2 The values stated in SI units are to be regarded as the D 907 Terminology of Adhesives
standard. The values given in parentheses are provided for
3. Terminology
information purposes only.
3.1 Definitions—Many terms in this test method are defined
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the in Terminology D 907.
3.1.1 peel strength, n—the average load per unit width of
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- bondline required to separate progressively a flexible member
bility of regulatory limitations prior to use. from a rigid member or another flexible member.
3.1.1.1 Discussion—Flexible has different meanings in dif-
ferent peel tests, such as “T”, 180-degree, floating-roller, or
This test method is under the jurisdiction of ASTM Committee D14 on
Adhesives and is the direct responsibility of D14.80 on Metal Bonding Adhesives.
Current edition approved Nov. 10, 2000. Published January 2001. Originally Annual Book of ASTM Standards, Vol 02.02.
published as D 1876 – 61 T. Last previous edition D 1876 – 95. Annual Book of ASTM Standards, Vol 15.06.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
D 1876
climbing-drum. The angle between the members varies with Specially prepared test panels 152 mm (6 in.) wide by 305 mm
the type of peel test. (12 in.) long, but bonded only over approximately 241 mm (9
3.2 Definitions of Terms Specific to This Standard: in.) of their length. Test panels of these same dimensions may
3.2.1 flexible, adj—indicates that the adherends shall have also be cut from larger, fully laminated panels.
such dimensions and physical properties as to permit bending
NOTE 3—Direct comparisons of different adhesives can be made only
them through any angle up to 90° without breaking or cracking.
when specimen construction and test conditions are identical.
3.2.2 T-peel strength, n—the average load per unit width of
NOTE 4—Clad aluminum alloy 0.81 mm (0.032 in.) thick conforming to
bond line required to produce progressive separation of two Specification B 209, Alloy 2024-T3, has been found satisfactory as an
adherend for structural adhesives. Canvas, coated fabrics, plastics films,
bonded, flexible adherends, under conditions designated in this
and metal foils have also proven to be satisfactory adherends for use with
test method.
specific adhesives.
NOTE 5—It is not essential that the two adherends be alike, either in
4. Apparatus
material or thickness. They shall, however, be capable of being bent
4.1 Tension Testing Machine, capable of applying a tensile
through any angle up to 90° without breaking.
load having the following prescribed conditions:
5.2 The bonded panels cut into 25-mm (1-in.) wide test
4.1.1 The machine and loading range selected that the
specimens (see Fig. 1) by a means that is not deleterious to the
maximum load on the specimen falls between 15 and 85 % of
bond. The 76-mm (3-in.) long unbonded ends bent apart,
the upper limit of the loading range.
perpendicular to the glue line, for clamping in the grips of the
4.1.2 The rate of movement between heads essentially
testing machine.
constant under fluctuating loads.
5.3 At least ten test specimens
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