ASTM D1876-01 pdf free download.Standard Test Method for Peel Resistance of Adhesives (T-Peel Test).
3.1.1.1 Discussion—Flexible has different meanings in different peel tests, such as "T". 180-degree, floating-roller, or climbing-drum. The angle between the members varies with the type of peel test.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 flexible, adj—indicates that the adherends shall have such dimensions and physical properties as to permit bending them through any angle up to 90° without breaking or cracking.
3.2.2 T-peel strength, n—the average load per unit width of bond line required to produce progressive separation of two bonded, flexible adherends, under conditions designated in this test method.
4. Apparatus
4. 1 Tension Testing Machine, capable of applying a tensile load having thc following prescribed conditions:
4. 1. I The machine and loading range selected that the maximum load Ofl the specimen falls between 15 and 85 % of the upper limit of the loading range.
4.1.2 The rate of movement between heads essentially constant under fluctuating loads.
NOTE 1—li is difficult to meet this requirement when loads are measured with a spring-type or pendulum-type weighing device.
9. Report
9.1 Report the following information:
9.1.1 Complete identification of the adhesive tested, including type, source, manufacturer’s code number, hatch or lot number, form, etc.,
9.1.2 Complete identification of adherends used, including material, thickness, surface preparation, and orientation,
9.1.3 Description of bonding process. including method of application of adhesive, glue-line thickness, drying or precuring conditions (where applicable), curing time, temperature, and pressure.
9.1.4 Average thickness of adhesive layer after formation of the joint, within 0.025 mm (0.001 in.). The method of obtaining the thickness of the adhesive layer shall be described including procedure, location of measurement, and range of measurements.
9.1.5 Complete description of the test specimens, including dimensions and construction of the test specimens, conditions used for cutting individual test specimens, number of test panels represented, and number of individual test specimens.
9. 1 .6 Conditioning procedure prior to testing.
9.1.7 Type of test machine and crosshead separation rate used.
9.1 •8 Method of recording load and determining average load,
9.1.9 Average, maximum, and minimum peeling load values for each individual specimen,
9.1.10 Average T-peel strength in pounds per inch of width for each combination of materials and constructions under test. and
9.1.11 Type of failure, that is, cohesive failure within the adhesive or adherend or adhesion to the adherend, or combination thereof, for each individual specimen (see Terminology
D 907).
10. Precision and Bias
10.1 Precision and bias for this test method is being developed and will be available by September 2004.
11. Keywords
11.1 adhesive bonding: flexible adherends: T-peel strength.ASTM D1876 pdf download.