ASTM D429 Standard Test Methods for Rubber Property—Adhesion to Rigid Substrates

ASTM D429 covers procedures for testing the static adhesional strength of rubber to rigid materials (in most cases metals).

Method A—Rubber Part Assembled Between Two Parallel Metal Plates.

Method B—90° Stripping Test—Rubber Part Assembled to One Metal Plate.

Method C—Measuring Adhesion of Rubber to Metal with a Conical Specimen.

Method D—Adhesion Test—Post-Vulcanization (PV) Bonding of Rubber to Metal.

Method E—90° Stripping Test—Rubber Tank Lining— Assembled to One Metal Plate.

Method F—Rubber Part Assembled Between Two Parallel Convex-Shaped Metal Plates

Method G—Measuring Bond Durability for Rubber-to-Metal Bonded Components with a Double Shear Cylindrical Specimen

Method H—Measuring Bond Durability for Rubber-to-Metal Bonded Components with a Quadruple Shear Specimen

While the test method may be used with a wide variety of rigid materials, use of materials other than metals is the exception.

For this reason, we have used the word “metal” in the text rather than “rigid materials.”

ASTM D429  / Apparatus

Testing Machine—A power driven test machine equipped to produce a uniform rate of grip separation shall be used for measuring the strength of adhesion.

The head of the machine shall travel at the uniform rate of 0.83 6 0.08 mm/s (2 6 0.2 in./min).

ASTM D429 / Fixture

Any suitable fixture for holding the test specimen to the upper head of the machine may be used provided the direction of pull to cause separation shall be,

at all times during the test, as nearly perpendicular as possible, that is, making a 90° angle with the top holding fixture.

Grips

Any suitable grip may be used, provided it does not slip or rupture the rubber strip.

*** Before conducting ASTM D429 , it is important to read the entire specification. Standards can be obtained from appropriate standard authorities.