ASTM D429 Method B on a Single Column Universal Testing Machine
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ASTM D429 | Rubber | Adhesion Strength

ASTM D429 is a testing specification that includes eight test methods for testing the static adhesion strength of rubber to rigid materials. Methods A, B, C, D, and E are used for obtaining comparative adhesion test data and Methods A, B, C, and D are applicable to testing end products in which rubber is used for controlling vibration.

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.

Method B: 90 degree stripping test – Rubber part assembled to one metal plate- Determines the adhesive strength of rubber-to-metal bonding agents.

Method C: Measuring adhesion of rubber-to-metal with a conical specimen- Provides data for the development and control of bonding systems and components.

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.

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.

Method F: Rubber part assembled between two parallel convex-shaped metal plates- Determines the adhesive strength of rubber-to-metal bonding agents.

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.

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.

Before conducting ASTM D429, it is important to read the entire specification in the relevant ASTM publication.

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ASTM D429 | Rubber | Adhesion Strength

Method A- Rubber part assembled between two parallel metal plates

  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

  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

  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

  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

  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

  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-t0-metal bonded components with a double shear cylindrical specimen

  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 debound and the corresponding time.

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

  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.

ASTM D429 | Rubber | Adhesion Strength

ASTM D429 Recommended Equipment
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Fixturing
Accessories
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