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ASTM D3359 Measuring Adhesion by Tape Test
It is not unexpected that different operators might obtain different results 12. Adhesion is then rated by comparing lm removed against an established rating scale. Because of the variability in adhesion strength from batch-to-batch and with time, it is essential that tape from the same batch be used when tests are to be run in different laboratories. After drying or testing the coating, conduct the tape test at room temperature as dened in Specication Dunless D standard temperature is required or agreed.
ASTM D – 17 Standard Test Methods for Rating Adhesion by Tape Test
Note 3It should be recognized that differences in adherability of the coating surface can affect the results obtained with coatings having the same inherent adhesion. Users shall not use intermediate values for ranking adhesion tests within this method.
NOTE 2—Subject to agreement between the purchaser and the seller, Test Method B can be used for thicker films if wider spaced cuts are employed. It is of particular importance that the cutting edges be in good condition. Last previous edition approved in as D — It is of particular importance that the cutting edges be in good condition. Originally approved in Precision and bias data on the latter is lacking.
Adhesion is then rated by comparing film removed against an established rating scale. Because the substrate and its surface preparation or lack of it have a drastic effect on the adhesion of coatings, a method to evaluate adhesion of a coating to different substrates or surface treatments, or of different coatings to the same substrate and treatment, is of considerable usefulness in the industry. For large structures make sufficient tests to ensure that the adhesion evaluation is representative of the whole surface.
For multicoat systems where adhesion failure may occur between or within coats, the adhesion of the coating system to the substrate is not determined. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. The values given in parentheses are for information only. Signicance and Use 4. The color under the tape is a useful indication of when good contact has been made. But this, in fact, is not their purpose.
For tests in the eld, ensure that the surface is clean and dry. As Mittal 1 9 has pointed out, the answer is both yes and no. For large structures make sufficient tests to ensure that the adhesion evaluation is representative of the whole surface. Extremes in temperature or relative humidity may affect the adhesion of the tape or the coating.
ASTM D 3359 – 09 Standard Test Methods for Measuring Adhesion by Tape Test
The central issues are that the test on plastics lacks reproducibility and does not relate to the intended application. It is the responsibility of the user of this standard to establish appropriate safety and health d359-08 and determine the applicability of regulatory limitations prior to use.
Historical Version s – view previous versions of standard. Criticism of these tests arises when they are used to quantify the strength of adhesive bonding. 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 d359-08.
These effects are related as they reect certain rheological properties of the backing and adhesive that are molecular in origin. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their asfm responsibility.
If the metal has not been reached make another grid in a different location. Further, the tape test does not give an absolute value for the force required for bond rupture, but serves only as an indicator that some minimum d335908 for bond strength was met or exceeded 7, 8. NOTE 1—This test method has been reported being used to measure adhesion of organic coatings on soft substrates for example, wood and plastic.
While this may be an d3359-80 between purchaser and seller, the precision values given in Common methods which approach the direct tests are peel, lapshear, and tensile tests. In actuality, however, this force is distributed over a discrete distance O-A in Fig. Rate the adhesion in accordance with the following scale illustrated in Fig. After immersion, clean and wipe the surface with an appropriate solvent which will not harm the integrity of the coating.
But this, in fact, is not their purpose. Weatherization Game Print and Assembly Directions.
However, the precision values given in