Adhesion testing

Details Adhesion testing Adhesion testing

1994-01-21

1996-11-19

Sells, James

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156247, 156344, 156378, 156584, 73150A, B32B 3100

Patent

active

055758681

ABSTRACT:
The present invention provides a method and system for testing the adhesive strength of a bond between a coating or other material, or an adhesive tape, and an underlying surface or substrate to which it is bonded. The test may be performed at room temperature or in an environmental chamber at extreme conditions. In one embodiment an aperture is formed through the substrate and adhesive tape or a coating of paint is applied to the surface surrounding the aperture. A membrane, which approximately maintains its elastic property with only minor yielding during the test, is bonded to the paint or tape, the bond of the membrane to the paint or tape being stronger than the adhesion of the paint, or tape, to the substrate. Pressure is increasingly applied through the aperture, deforming the membrane away from the substrate until the critical pressure is reached and the bond between the paint, or tape, and the substrate fails. The adhesive strength, expressed as the specific work of debonding, is calculated using the critical pressure and a formula based upon constants inherent to the system. In another embodiment the invention may be used for testing the adhesive strength of an adhesive bonding two materials. In yet another embodiment the adhesive strength of a bond between a coating and an underlying surface may be determined in a surface mounted fashion.

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