How to Perform ASTM D429 Rubber Property – Adhesion to Rigid Substrates

Method A: Rubber part assembled between two parallel metal plates

Determines adhesion values and test the effectiveness of different processing techniques and different adhesive systems.

1. Prepare the test specimens as described in the method.
2. Zero the load and position.
3. Apply tensile force at the specified rate until rubber separates from the metal surface or ruptures.
4. Record the total force at failure.

Method B: 90 degree stripping test – Rubber part assembled to one metal plate

Determines the adhesive strength of rubber-to-metal bonding agents.

1. Prepare the test specimens and place it symmetrically in the jaws attached to the fixed grip with the separating edge toward the operator, as described in the method.
2. Zero the load and position.
3. Apply a steady load at the rate specified in the standard until separation.
4. Record the adhesion value.

Method C: Measuring adhesion of rubber-to-metal with a conical specimen

Provides data for the development and control of bonding systems and components.

1. Prepare the test specimens and place it symmetrically in the grips, as described in the method.
2. Zero the load and position.
3. Apply tensile force at the specified rate until rubber separates from the metal surface or ruptures.
4. Record the total force at failure.

Method D: Adhesion test: Post-vulcanization (PV) of bonding of rubber to metal

Determines the strength of adhesion of rubber to metal when the bond is formed after rubber has been vulcanized.

1. Prepare the test specimens as described in the method.
2. Attach the bonded assembly to the testing machine with the appropriate fixturing.
3. Apply force until the bonded assembly ruptures.
4. Record the adhesion value.

Method E: 90 degree stripping test- Rubber tank lining- assembled to one metal plate

Determines the adhesive strength of rubber tank lining to tank wall.

1. Prepare the test specimens and place it symmetrically in the jaws attached to the fixed grip with the separating edge toward the operator, as described in the method.
2. Zero the load and position.
3. Apply a steady load at the rate specified in the standard until separation.
4. Record the adhesion value.

Method F: Rubber part assembled between two parallel convex-shaped metal plates

Determines the adhesive strength of rubber-to-metal bonding agents.

1. Prepare the test specimens as described in the standard.
2. Mount the specimens in the threaded grips.
3. Zero the load and position.
4. Apply tensile force at the specified rate until rubber separates from the metal surface or ruptures.
5. Record the adhesion value.

Method G: Measuring bond durability for rubber-to-metal bonded components with a double shear cylindrical specimen

Determines the relative bond durability between various adhesives.

1. Prepare the specimens as described in the standard.
2. Pull one test specimen from each molded bath to determine the 100% adhesion prior to immersion.
3. Place the bonded test specimens in the test fixture with the chosen %strain and begin the oxygen bubbling at the selected rate.
4. Measure the amount of debond and the corresponding time.

Method H: Measuring bond durability of rubber-to-metal bonded components with quadruple lap shear specimen

Same as Method G except that no fixture imparting the shear stress is required, only a simple block inserted into the test piece once the pre-strain has been applied.

1. Follow the steps outlined in Method G with the exception of a fixture for imparting the shear stress, only a block inserted into the test piece once the pre-strain has been applied.