EN 1966:2009

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
   5.1 Test piece preparation apparatus
       5.1.1 Device for moulding the adhesive
       5.1.2 Accessories
   5.2 Shapes and dimensions
   5.3 Substrate materials
   5.4 Test apparatus and measuring apparatus
       5.4.1 Bending machine
       5.4.2 Test piece positioning device
       5.4.3 Measuring apparatus
6 Preparation of substrate surfaces before bonding
7 Preparation of test pieces
   7.1 General
   7.2 Inserting substrates
   7.3 Inserting adhesive
   7.4 Hardening
   7.5 Opening the mould
   7.6 Conditioning the test pieces
8 Test methods
9 Expression of results
10 Test report

This European Standard 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 should be rigid or resistant enough to bending such as steel or aluminium alloys. For other substrates the thickness should be adjusted to the modulus of elasticity or a suitable stiffener should be used.The adhesive should 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 can be substituted for the bloc of adhesive.It is not suitable for film adhesives.