DD ENV 1966:1996 - Structural adhesives. Characterization of a surface by measuring adhesion by means of the three point bending method
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This European prestandard describes a test method to determine ability of a cured adhesive
(possibly with a primer) to adhere to a substrate which has had a certain surface finish or with a
specific surface preparation by using the "three point bending method".
It is only used for quality assurance and the substrate must be rigid or resistant enough to
bending such as steel or aluminium alloys. For other substrates the thickness has to be adjust to
the modulus of elasticity or a suitable stiffener has to be used.
The adhesive be polymerisable (curable) without pressure in order to obtain the thickness needed
to provide sufficient rigidity, otherwise, a bonded reinforcing piece of the same type and same
thickness as the substrate may be substituted for the block of adhesive.
It is not suitable for film adhesives.
