ASTM D assesses the adhesion of film coatings to metallic substrates by applying and removing pressure-sensitive tape over cuts made in the film. Documents Similar To ASTM D Eng Cross-cut. ISO Uploaded by. Quang Duan Nguyen · ISO Uploaded by. Anonymous n4bJbeLAq. This product is ASTM D compliant. Proven to be a very close equivalent to the Permacel P99 tape which was withdrawn from production by the.
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Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Because of the variability in 7. 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. Extremes in temperature or relative humidity may affect the adhesion of the tape or the coating.
It is reasonable to state that at the present time no test exists that can precisely assess the actual physical strength of an adhesive bond. ASTM D cross h 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.
For tests in the eld, ensure that the surface is clean and dry. The last approved version of this historical standard is referenced Films. Precision and bias data on the latter is lacking. Active view current version of standard. Precision and Bias 6 dry or prepare the surface, or both, as agreed upon between the 9.
NOTE 3—It should be recognized that differences in adherability of the coating surface can affect the results obtained with coatings having the same inherent adhesion. Direct tests include the Hesiometer and the Adherometer 2. Apparatus and Materials 7 Variation in pull rate and peel angle can effect large differences in test values and must be minimized to assure reproducibility 3.
Test Methods Related Coating Products D was developed with metal as the substrate and, in the absence of D Practices for Producing Films of Uniform Thickness supporting precision and bias data, is so limited. Users shall not use intermediate values for ranking adhesion tests within this method. Precision and bias data on the later is lacking. There generally is difficulty, however, in relating these tests to basic ast phenomena.
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But this, in fact, is not their purpose. Common methods which approach the direct tests are peel, lapshear, and tensile tests. 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 value for bond strength was met or exceeded 7, 8. The unique functional requirements of coatings on plastic substrates cause the usual tape tests to be unsatisfactory for measuring adhesion performance in practice.
ASTM D 3359 – 09 Standard Test Methods for Measuring Adhesion by Tape Test
The coating has aked along the edges of cuts in large ribbons and whole squares have detached. It is assumed that coating removal occurs when the tensile force generated along the latter interface, which is a function of the rheological properties of the backing and adhesive layer materials, is greater than the bond strength at the coating-substrate interface or cohesive strength of the coating.
Referenced Documents purchase separately The documents d339-09 below are referenced within the subject standard but are not provided as part of the standard. It should be noted, however, that multitip cutters8 provide good results only on test areas sufficiently plane that all cutting edges contact the substrate to the same degree.
Astk concerns are well founded: If the substrate has not been reached make another 5. This standard has been approved for use by agencies of the Department of Defense. Last previous edition approved in as D — Key steps that directly reect the importance of operator skill include the d3359-09 and rate of tape removal and the visual assessment of the tested sample. Summary of Test Methods 3. Also, Test Method B is not considered suitable for lms thicker than 5 mils m. A signicant compressive force arises from the response of the tape backing material to being stretched.
Historical Version s – view previous versions of standard Translated Awtm s: Based on these These effects are related as they reect certain rheological properties of the backing and adhesive that are molecular in origin. Major limitations of the tape test are its low sensitivity, applicability only to coatings of relatively low bond strengths, and non-determination of adhesion to the substrate where failure occurs within a single coat, as when testing primers alone, or within or between coats in multicoat systems.
Furthermore, these test methods do not give an absolute value for the force required for bond rupture, but serves only as an indicator that some minimum value for bond strength was met or exceeded 12.
99 Adhesive ASTM D Tape (KM)
More importantly, in this instance the test is being applied beyond its intended scope. NOTE 6—If desired or specied, the coated test panels may be subjected to a preliminary exposure such as water immersion, salt spray, or high humidity before conducting the tape test.
A similar test method, ISOpermits tests on soft substrates for example, wood and plaster. Criteria deemed essential for a test to warrant large-scale acceptance are: If this is not possible the test method should be used only for ranking a series of test coatings. In actuality, however, this force is distributed over a discrete distance O-A in Fig. Because the substrate and its surface preparation between the purchaser and seller.
It is of particular importance that the cutting edge or Because the substrate and its surface preparation or lack thereof 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, is of considerable usefulness in the industry.
Test Specimens dance with the following scale: Active view current version of standard Translated Standard: