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After immersion, clean and wipe the surface with an appropriate solvent which will not harm the integrity d3395-08 the coating. Issues with plastic substrates are noted in Appendix X1. Active view current version of standard Translated Standard: Note 1This test method has been reported being used to measure adhesion of organic coatings on soft substrates for example, wood and plastic.
Asstm central issues are that the test on plastics lacks reproducibility and does not relate to the intended application.
ASTM D Measuring Adhesion by Tape Test
This standard has been approved for use by agencies of the Department of Defense. The central issues are that the test on plastics lacks reproducibility and does not relate to the intended application. The intra- and inter-laboratory precision of this test method is similar d3539-08 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.
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 d33559-08 different substrates or surface treatments, or of different coatings to the same substrate and treatment, is of considerable usefulness in the industry.
Criticism of these tests arises when they are used to quantify the strength of ast bonding. The color d335-08 the tape is a useful indication of when good contact has been made. A similar test method, ISOpermits tests on soft substrates for example, wood and plaster. Signicance and Use 4. Precision and Bias 6 Differences in tapes f3359-08 can lead to different results as small changes in backing stiffness and adhesive rheology cause large changes in the tension area.
Approved February 1, NOTE 1—This test method has been reported being used to measure adhesion of organic coatings on soft substrates for example, wood and plastic. Justication for the cutting step is reasonable as cutting provides a free edge from which peeling can begin without having to overcome the cohesive strength of the coating layer. For multicoat systems d33359-08 adhesion failure may occur between or within coats, the adhesion of the coating system to the substrate is not determined.
But it can also be said that it is possible to obtain an indication of relative adhesion performance.
The conditions and time of exposure will be governed by ultimate coating use or shall be agreed upon between the purchaser and seller. In its simplest version a piece of adhesive tape is pressed against the paint film and the resistance to and degree of film removal observed when the tape is pulled off.
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 coating has aked along the edges of cuts in large ribbons and whole squares have detached.
To ensure good contact with the film rub the tape firmly with the eraser on the end of a pencil. The coating has flaked along the edges of cuts in large ribbons and whole squares have detached. Apparatus and Materials Significance and Use 4.
As such, no single tape is likely to be suitable for testing all coatings. 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. Your comments will receive careful consideration at a meeting of the responsible technical committee,1 which you may attend.
ASTM D3359 Measuring Adhesion by Tape Test
Precision and bias data on the later is lacking. By design it was made d3359-088 simple as possible to perform, and requires a minimum of specialized equipment and materials that must meet certain specifications. It is not unexpected that different operators might obtain different results 7, 8. Originally approved in In actuality, however, this force is distributed over a asstm distance O-A in Fig. Your comments will receive careful consideration at a d335-08 of the responsible technical committee, which you may attend.
If this is not possible the test method should be used only for ranking a series of test coatings. Issues with plastic substrates are noted in Appendix X1. If the substrate has not been reached make another X in a different location. NOTE 3—It should be recognized that differences in adherability of the coating surface can affect the results obtained with d3359-8 having the same inherent adhesion. They do not distinguish between higher levels of adhesion for which more sophisticated methods of measurement are required.
When making the incisions, use the straightedge and cut through the coating to the substrate in one steady motion.
ASTM D – 17 Standard Test Methods for Rating Adhesion by Tape Test
Atm List Please contact us first before donating any of these items. Variation in pull rate and peel angle can effect large differences in test values and must be minimized to assure reproducibility 3. NOTE 5—Coatings should be applied in accordance with Practice Dor as agreed upon between the purchaser and the seller. A similar test method, ISOpermits tests on soft substrates for example, wood and plaster. A similar test method, ISOpermits tests on non-metallic substrates for example, wood and plaster.
Thus both tensile and compressive axtm are involved in adhesion tape testing. When making successive single cuts with the aid of a guide, place the guide on the uncut area.
The accuracy and precision of the test result obtained by using these methods depends largely upon the skill of the operator and the operator’s ability to perform the test in a consistent manner.
Both concerns are well founded: Small akes of the coating are aetm along edges and at intersections of cuts. NOTE 4—Permacel P99 tape, previously identified as suitable for this purpose, was withdrawn from manufacture in July A number in parentheses indicates the year of last reapproval.
If the adhesion strength of the tape wstm not been determined, report the specific tape used and its manufacturer. 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.