This test method is used to determine the relative peel resistance of adhesive bonds between flexible substrates utilizing a T-type specimen. The test specimen is loaded into a tensile tester with the bent, un-bonded ends clamped in the grips. The specimen is then pulled apart, and the peak and average peel forces are measured. Though no specific parameters or procedures for preparation are provided, it is important to follow all manufacturer instructions. Accordingly, it is essential that the adhesive manufacturer provides all relevant specifications for the application of the adhesive. These include surface preparation, mixing directions, application rate, and thickness and curing conditions.
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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. 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 speci?
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. 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.
Scope 1. The values given in parentheses are provided for information purposes only. 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. Referenced Documents 2. Terminology 3. Current edition approved Oct.
Published December Originally published as D — 61 T. The angle between the members varies with the type of peel test. Apparatus 4. NOTE 1—It is difficult to meet this requirement when loads are measured with a spring-type or pendulum-type weighing device. Specially prepared test panels mm 6 in. Test panels of these same dimensions may also be cut from larger, fully laminated panels. NOTE 3—Direct comparisons of different adhesives can be made only when specimen construction and test conditions are identical.
NOTE 4—Clad aluminum alloy 0. Canvas, coated fabrics, plastics? NOTE 5—It is not essential that the two adherends be alike, either in material or thickness. The 76—mm 3—in. NOTE 6—Within the limitations imposed by Note 3, other specimen widths may be used, provided the test machine grips are of ample width to apply the load uniformly across the width of the adherends.
NOTE 7—For obtaining a gripping area on specimens that are completely bonded, one end of the bonded specimen may be chilled in dry ice until the adhesive becomes brittle, and then the adherends may be carefully pried apart. The technique will not work for all adhesives and adherends. Conditioning 6. NOTE 8—Conditioning is not required for laminated assemblies containing only metal adherends, unless speci?
Test Specimen 5. Procedure 7. Apply the load at a constant head speed of mm 10 in. NOTE 9—This speed will cause separation of the bond at a rate of mm 5 in. Calculation 8. It is preferred that the average to be determined from the curve with the use of a planimeter. NOTE 10—In case a planimeter is not used, the average may be calculated as the average of load readings taken at? For example, the load may be recorded at each mm 1-in.
Report 9. The method of obtaining the thickness of the adhesive layer shall be described including procedure, location of measurement, and range of measurements.
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ASTM D1876 Adhesive Peel Strength Testing
Previous Next There are many test methods used to determine the strength of an adhesive including peel, shear, cleavage, and tension tests. Peel tests are common for tapes, labels, coatings, and other bonded materials. There are three main types of peel tests including 90 degree peel test, degree peel test, and a T-Peel test. The Loop Tack test is similar in concept but is better classified as a tension test. Why would you perform the T-Peel test instead of the 90 or degree test?
Peel Resistance of Adhesive (T-Peel Test) ASTM D1876
How to Perform an Adhesive Strength T-Peel Test – ASTM D1876