Standard Test Methods for Multi-Modal Strength Testing of Autohesives (Contact Adhesives)

Importancia y uso:

5.1 The application procedures in these test methods yield films free of the irregularities, artifacts, and variations inherent in brushing, spraying, or trowelling. Accordingly, these test methods measure the strength of autohesive bonds between two autohesive films whose topography is characteristic of the autohesive itself rather than the artifacts of the application procedure. It is recommended that this information be considered in extrapolating results from these test methods.

5.2 The magnitude of the measured bond strengths also depends on other factors such as film thickness, the manner in which pressure is applied, the magnitude and duration of the application of pressure, and the temperature and humidity at various stages of the test. Accordingly, these parameters should be chosen in a manner consistent with the end use of the autohesive.

5.3 In case of a dispute arising from differences in reported results when using these test methods for acceptance testing of commercial shipments, the purchaser and the supplier should conduct comparative tests to diagnose the causes for lack of repeatability between their laboratories. Competent statistical assistance is recommended for the investigation of precision. As a minimum, the two parties should select a group of test specimens and visually examine their failure modes. The average results from the two laboratories should then be compared using Student’s t-test for unpaired data and an acceptable probability level should be chosen by the two parties before testing is begun.

Subcomité:

D14.70

Referida por:

D6465-99R24

Volúmen:

15.06

Número ICS:

83.180 (Adhesives)

Palabras clave:

autohesive; cleavage; climbing drum peel; compression shear; flexible-to-flexible adherends; flexible-to-rigid adherends; rigid-to-rigid adherends; T-peel;