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 Proven to be a very close equivalent to the Permacel P99 tape which was withdrawn from production by the.
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This standard has been approved for use by agencies of the Department of Defense. 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.
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.
As Mittal 1 10 has pointed out, the answer is both yes and no. However, the precision 7 Multiblade cutters are available from a few sources that specialize in testing values given in Cut through the lm to the substrate in one steady motion using just sufficient pressure on the cutting tool to have the cutting edge reach the substrate.
Issues with plastic substrates are noted in Appendix X1. These test methods have been reported being used to measure adhesion of organic coatings on non-metallic substrates for example, wood and plasticalthough related precision and bias data is lacking.
ASTM D – 09 Standard Test Methods for Measuring Adhesion by Tape Test [PDF] – Все для студента
Dhave advised this subcommittee that the properties of these tapes were changed. Both concerns are well founded: 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 3d359-09 the bond strength at the coating-substrate interface or cohesive strength of the coating. It is of particular importance that the cutting edge or Precision and Bias 6 dry or prepare the surface, or both, as agreed upon between the 9.
When making successive single cuts with the aid of a guide, place the guide on the uncut area. Precision and Bias 6 Common methods which approach the direct tests are peel, lapshear, and tensile tests. Active view current version of standard D335909 Standard: It is not unexpected that different operators might obtain different results 7, 8. For large structures make d33359-09 tests to ensure that the adhesion evaluation is representative of the whole surface.
Issues with plastic substrates are noted in Appendix X1.
Adhesive ASTM D3359 Cross Hatch Adhesion Test Tape | Elcometer 99
Apparatus and Materials Rate the adhesion in accordance with the following scale illustrated in Fig. The intra- and inter-laboratory precision of this test method is similar to other widely-accepted tests for coated substrates for example, Test Method D and Test Method Dbut this is partly the result of it being insensitive to all but large differences in adhesion.
The limited scale of 0 to 5 was selected deliberately to avoid a false impression of being sensitive. Dhave advised this subcommittee that the properties of these tapes were changed. Key steps that directly reflect the importance of operator asstm include the angle and rate of tape removal and the visual assessment of the tested sample.
A given lot may surpass these standards and thus be suitable for general market distribution; however, such a lot may be a source of serious and unexpected error in assessing adhesion. A similar test method, ISOpermits tests on r3359-09 substrates for d33599-09, wood and plaster. 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 own responsibility.
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. In actuality, however, this force is distributed over a discrete distance O-A in Fig.
Both test methods are used to establish whether the adhesion of a coating to a substrate is at an adequate level; however they do not distinguish between higher levels of asm for which more sophisticated methods of measurement are required. The conditions and time of decorating a substrate, it must adhere to it for the expected exposure will be governed by ultimate coating use or shall be agreed upon service life.
Test Methods D was developed with metal as the substrate and, in the absence of supporting precision and bias d3395-09, is so limited. If the substrate has not been reached make another 5.
Do not attempt to deepen a previous cut as this may affect adhesion along the incision.
99 Adhesive ASTM D Tape (KM)
Historical Version s – view previous versions of standard. As such, no single tape is likely to be suitable for testing all coatings. The values given in parentheses are for information only. They do not distinguish between higher levels of adhesion for which d3359-09 sophisticated methods of measurement are required.
ASTM D 3359 – 09 Standard Test Methods for Measuring Adhesion by Tape Test
Variation in pull rate and peel angle can effect large differences in test values and must be minimized to assure d3359-9 3. The color under the tape is a useful indication of when good contact has been made. Your comments will receive careful consideration at a meeting of the responsible technical committee,1 which you may attend. 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.
Flaking and detachment worse than Grade 1. A number in parentheses indicates ashm year of last reapproval. Current edition approved Feb. Originally approved in