Standard Test Methods for Rating Adhesion by Tape Test

Importancia y uso:

5.1 In order for a coating is to fulfill its function of protecting or decorating a substrate, the coating must remain adhered to the substrate. 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.

5.2 This test method is limited to evaluating lower levels of adhesion (see 1.3). The intra- and inter-laboratory precision of this test method is similar to other test methods for coated substrates (for example, Test Method D2370 and Test Method D4060), and is insensitive to all but large differences in adhesion. Limiting the range of rankings from 0 to 5 reflects the inability of this test method to make fine distinctions between levels of adhesion. Users shall not use intermediate values for ranking adhesion tests within this method.

5.3 Extremes in temperatures or relative humidity may affect the adhesion of the tape or the coating.

5.4 A given tape may not adhere equally well to different coatings due to several factors, including differences in coating composition and topology. As such, no single tape is likely to be suitable for testing all coatings. 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 (1, 2).6

5.5 Operators performing these test methods must be trained and practiced in order to obtain consistent results. 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. Key steps that directly reflect the importance of operator skill include the angle and rate of tape removal and the visual assessment of the tested sample. It is not unexpected that different operators might obtain different results (1, 2).

5.6 The standard requires that the free end of the tape be removed rapidly at as close to a 180° angle as possible. When the peel angle and rate vary, the force required to remove the tape can change dramatically due to the rheological properties of the backing and adhesive. Variation in pull rate and peel angle can effect large differences in test values and must be minimized to assure reproducibility (3).

Note 1: These test methods have been reported being used to measure adhesion of organic coatings on non-metallic substrates (for example, wood and plastic), although related precision and bias data is lacking. 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. Issues with plastic substrates are noted in Appendix X1. A similar test method, ISO 2409, permits tests on non-metallic substrates (for example, wood and plaster). Precision and bias data on the latter is lacking. Test Method D3359 was developed with metal as the substrate and, in the absence of supporting precision and bias data, is so limited.

Subcomité:

D01.23

Referida por:

F2264-14R19, F1169-19, B0904-25, F1967-24, F2372-15R21, F0833-21, F2088-24, F2957-13R25, F2933-21A, F2641-24, D4054-24A, F2933-21A, D3451-24, F3669-24, F1164-24, F1178-11R22, E1797-12R17E01, D5064-16AR21, F2640-18R24, F2549-22, B0921-08R23, D7254-21, F3317-20R24, B0905-00R21, F0146-12R19E01, F2236-24, E1796-24, F3660-23, F2388-21, F1043-18R22, D5163-16R21, D6943-15R24, D2248-25, D5065-17R21, F2831-19R24, F1169-19, D5367-16R21, A0755_A0755M-18R24, F3176-20, B0449-93R22, D0870-15R20E01, A1113_A1113M-20E01, D1735-21, F3393-24, F2194-22E01, D4587-23, D4585_D4585M-18, D3794-22, F2372-15R21, D7893-13R24, D2454-23, F1428-23, F3343-20R24, F3084-25, F1004-23, F2613-22, D5498-12AR18, D7167-12R18, F2194-22E01, D2247-15R20E01, D7270-07R21, F1235-18, B0999-15R22, F2907-22, F2264-14R19, E1795-25, D7733-12R21, D8555-24, D4802-16R24, F1917-23, D3732-23, F2285-22, A0755_A0755M-18R24, D1014-25, D6944-15R20, D3322-23, F3186-24, F3182-23, F2589-16R21, D6577-24A, F2408-16R23, F1967-24, F2951-19R24, D6695-24, C1530_C1530M-23, F0977-22E01, D6677-18R22, F1427-21E01, D6763-16R22, F3458-21, F2012-24, D6486-23, F2088-24, F0404-21, F2085-19, F2050-19, D3276-21, F0833-21, F2388-21, F2057-23, F2670-22, F2085-19, F2167-22, D5324-16R22, D5146-10R19, F1821-19E02, F3208-20, F2549-22, D7826-25, F0406-24, F0406-24, F0404-21

Volúmen:

06.01

Número ICS:

83.180 (Adhesives)

Palabras clave:

adhesion; crosscut adhesion test method; tape; tape adhesion test method; X-cut adhesion test method;