초록 ▼

A method and system are provided for testing the adhesive strength of a bond between an adhesive, a coating such as paint, or some other material, and an underlying substrate to which the test substance is bonded. The test may be performed at room temperature or in an environmental chamber at extrem

A method and system are provided for testing the adhesive strength of a bond between an adhesive, a coating such as paint, or some other material, and an underlying substrate to which the test substance is bonded. The test may be performed at room temperature or in an environmental chamber at extreme conditions. An aperture is formed through the substrate and a thin film is employed to cover the aperture. The film extends beyond the perimeter of the aperture in contact with a first surface of the substrate. A coating of adhesive, paint, adhesive tape, or any other substance to be tested is then applied atop the film and the surrounding surface of the substrate in a smooth, continuous layer. A membrane which maintains its elastic property with only minor yielding during the test is bonded to the test substance, either directly or by means of a layer of high-strength adhesive interposed therebetween. The adhesive strength of the bond between the membrane and the substance being tested must be greater than the bond between the substance being tested and the substrate. The test assembly thereby produced is clamped within a test fixture and pressure is applied through an aperture in the test fixture from the side of the substrate opposite the surface of the substrate to which the test substance is bonded. With increasing pressure the test substance and membrane are deformed at the aperture through the substrate until the critical pressure is reached and the bond between the test substance and the substrate fails.

대표청구항 ▼

A method for testing the strength of a test substance bonded to a substrate comprising the steps of: forming an aperture through the substrate; covering the aperture with a thin film positioned atop the substrate and extending beyond the perimeter of the aperture; applying the test substance to the

A method for testing the strength of a test substance bonded to a substrate comprising the steps of: forming an aperture through the substrate; covering the aperture with a thin film positioned atop the substrate and extending beyond the perimeter of the aperture; applying the test substance to the substrate and to the thin film so as to bond the test substance to the substrate while encapsulating the film between the test substance and the substrate; bonding the first surface of a membrane to the test substance, the adhesive strength of the bond between the membrane and the test substance being greater than the adhesive strength of the bond between the test substance and the substrate; and determining the critical pressure required to create a failure of the test substance around a continuous periphery of an area of the test substance covering the film and the substrate.