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Summary of Test Methods 3.
If you feel that your comments have not received a fair hearing you ast make your views known to the ASTM Committee on Standards, at the address shown below. The nal step in the test is visual assessment of the coating removed from the specimen, which is subjective in nature, so that the coatings can vary among individuals evaluating the same specimen 9.
ASTM D3359 Measuring Adhesion by Tape Test
But this, in fact, is not their purpose. Print 1 2 3 4 5 page sstarting from page current page.
It should be noted, however, that multitip cutters7 provide good results only on test areas sufficiently plane that all cutting edges contact the substrate to the same degree. In actuality, however, this force is distributed over a discrete distance O-A in Fig. Since an intact lm with appreciable adhesion is frequently not removed at all, the severity of the test is usually enhanced by cutting into the lm a asmt X or a cross hatched pattern, before applying and removing the tape.
It is not unexpected that different operators might obtain different results 12. Users shall not use intermediate values for ranking adhesion tests within this method.
ASTM D – 17 Standard Test Methods for Rating Adhesion by Tape Test
d3359-0 Also, because tapes change on storage, bond strengths of the tape may change over time 7, 8. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. More importantly, in this instance the test is being applied beyond its intended scope.
NOTE 7—If desired or specified, 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.
The limited scale of 0 to 5 was selected deliberately to avoid a false impression of being sensitive.
If testing coatings on non-metallic substrates, either Test Method A or Test Method B may be more appropriate and the method employed should be discussed by interested parties. Test Methods D was developed with metal as the substrate and, in the absense of supporting precision and bias data, is so limited. The unique functional requirements of coatings on plastic substrates cause the usual tape tests to be unsatisfactory for measuring adhesion performance in practice. The manufacturer of this tape and the manufacturer of the tape used in the interlaboratory study see RR: Common methods which approach the direct tests are peel, lapshear, and tensile tests.
But it can also be said that it is possible to obtain an indication of relative adhesion performance. The values given in parentheses are for information only. Active view current version of standard. Then dry or prepare the surface, or both, as agreed upon between the purchaser and the seller. It is not unexpected that different operators might obtain different results 7, 8. If the adhesion strength of the tape has not been determined, report the specific tape used and its manufacturer.
If you like to setup a quick demo, let us know at support madcad. Also, Test Method B is not considered suitable for films thicker than 5 mils ?
The color under the tape is a useful indication of when good contact has been made. 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.
ASTM D 3359 – 09 Standard Test Methods for Measuring Adhesion by Tape Test
Committee D01 has identified the location of selected changes to this standard since the last issue D – 07 that may impact the use of this standard. 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. If the peel angle and rate vary, the force required to remove zstm tape can change dramatically.
Note 1This test method has been reported being used to measure adhesion of organic coatings on soft substrates for example, wood and plastic. These test methods have been reported being used to measure adhesion of organic coatings on d3359-8 substrates for example, wood and plasticalthough related precision and bias data is lacking.
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.
ASTM D – 08 Standard Test Methods for Measuring Adhesion by Tape Test
As Mittal 1 10 has pointed out, the answer is both yes and no. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. If the peel angle and rate vary, the force required to remove the tape can change dramatically.
More importantly, in this aetm the test is being applied beyond its intended scope. When making successive single cuts with the aid of a guide, place the guide on the uncut d3359-8. Limiting the range of rankings from 0 to 5 reflects the inability of this test method to make fine distinctions between levels of adhesion. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Test Methods D was developed with metal as the substrate and, in the absense of supporting precision and bias data, is so limited.
ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. 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.
Link to Active This link will always route to the current Active version of the standard. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Do not attempt to deepen a previous cut as this may affect adhesion along the incision. The color under the transparent tape is a useful indication of when good contact has been made.