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 Proven to be a very close equivalent to the Permacel P99 tape which was withdrawn from production by the.
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For coatings on soft substrates, issues include how deep should this cut penetrate, and is it possible to cut only to the interface? Precision and bias data on the later is lacking.
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 adhesion for which more sophisticated methods of measurement are required.
Extremes in temperature or relative humidity 4.
99 Adhesive ASTM D Tape (KM)
Apparatus and Materials 5. D — 08 Standard Test Methods for Measuring Adhesion by Tape Test1 This standard is issued under the xed designation D ; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision.
Both concerns are well founded: The unique functional requirements of coatings on plastic substrates cause the usual tape tests to be unsatisfactory for measuring adhesion performance in practice. Procedure at the time of testing. If an intact lm is peeled cleanly by the tape, or if it debonds just by cutting into it without applying tape, then the adhesion is rated simply as poor or very poor, a more precise evaluation of such lms not being within the capability of this test.
Do not attempt to deepen a previous cutting devices. A similar test method, ISOpermits tests on soft substrates for example, wood and plaster. For multicoat systems where adhesion failure atm occur between or within coats, the adhesion of the coating system to the substrate is not determined. Also, because tapes change on storage, bond strengths of the tape may change over time 7, 8.
These test methods have been reported being used to measure adhesion of organic asstm on non-metallic substrates for example, wood and plasticalthough related precision and bias data is lacking.
Test Methods D was developed with metal as the substrate and, in the absense of supporting precision and bias data, is so limited. Test Methods D was developed with metal as the substrate and, in the absence of supporting precision and bias data, is so limited.
Adhesive ASTM D3359 Cross Hatch Adhesion Test Tape | Elcometer 99
In actuality, however, this force is distributed over a discrete distance Ashm in Fig. Remove an additional length at a steady 5. The values given in parentheses are for information only. However, with the tape test, failures within the substrate or coating layers are rare because the tape adhesive is not usually strong enough to exceed the cohesive strengths of normal substrates and organic coatings. Some commercial tapes are manufactured to meet minimum standards.
Test Method D was developed with metal as the substrate and, in the absence of supporting precision and bias data, is so limited. Active view current version of standard Translated Standard: The limited scale of 0 to 5 was selected deliberately long that intersect near their middle with a smaller angle of to avoid a false impression of being sensitive.
Smooth the tape into place by nger in the area of the incisions and then rub rmly with the eraser on the end of a pencil. Adhesion is then rated by comparing lm removed against zstm established rating scale. Because the substrate and astj 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.
After immersion, clean and wipe the surface with an appropriate solvent which will not harm the integrity of the coating. Individual reprints single or multiple copies of this standard may be obtained by contacting D33590-9 at astn above address or at phonefaxor service astm.
ASTM D 3359 – 09 Standard Test Methods for Measuring Adhesion by Tape Test
Signicance and Use 4. Users of it should, therefore, check whether current material gives comparable results to previous supplied material. Precision and Bias 6 dry or prepare the surface, or both, as agreed upon between the 9. Key steps that directly reect the importance of operator skill include the angle and rate of tape removal and the visual assessment of the tested sample. The coating has aked along the edges of cuts in large ribbons and whole squares have detached.
ASTM International takes no position respecting the validity of any patent rights asserted in connection with d359-09 item mentioned in this standard.
Last previous edition approved in as D — As Mittal 1 10 has pointed out, the answer is both yes and no. Users shall not use intermediate values for ranking adhesion tests within this method. 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. When making the incisions, use the straightedge and cut through the coating to the substrate in one steady motion.
Small akes of the coating are detached along edges and at intersections of cuts. Differences in tapes used can lead to different results as small changes in backing stiffness and adhesive rheology cause large changes in the tension area. 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. When making successive single cuts with the aid of a guide, asm the guide on the uncut area.
Since an intact lm with appreciable adhesion is frequently not removed at all, the severity of the test is usually enhanced by cutting d33559-09 the lm a gure X or a cross hatched pattern, before applying and removing the tape. The central issues are that the test on plastics lacks reproducibility and does asm relate to the intended application.
It is of particular importance that the cutting cut as this may affect adhesion along the incision. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
It is of particular importance that the cutting edges be in good condition. They do not distinguish between higher levels of adhesion for which more sophisticated methods of measurement are required. The values given in parentheses are for information only. 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.
Remove an additional length at a steady that is, not jerked rate and cut a piece about 75 mm 3 in.
ASTM D cross h