*Please Note: The information outlined above is to be used as reference for ASTM D Standard Test Methods for Rubber Property – Adhesion to Rigid. ASTM D determines the adhesion strength of rubber to rigid materials, such as metals. The standard requires that the testing machine conform to practices. 9 Sep This standard is issued under the fixed designation D ; the 1 These test methods are under the jurisdiction of ASTM Committee D11 on.
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The test is an orthogonal tensile test where the puck is pulled apart in tension. Prepare the rubber specimen for this test by vulcanizing it to the metal material of the tank.
To begin testing, place the test specimen in the jaws attached to the fixed grip with the separating edge toward the operator. This also allows the overflow recesses to be deeper, reducing problems associated overfill.
ASTM D429 – 14
ASTM D d4229 standard determines the adhesion of rubber to rigid metal substrates. The ASTM D standard describes methods to perform these tests with deadweights as an alternative to using a test machine. Users of previous versions of software such as Bluehill 2 and Bluehill 3 can easily upgrade to the newest version of Bluehill. Data from this test will be a typical tensile force plot force vs displacement.
Manual vice grips may also work but must be tightened very tight. Give one of our engineers a call today and they can help guide you through the ASTM D test process with the best machine configuration for your requirements. This section will be used to clamp in the jaws of d4299 grip. Method G of ASTM D measures the bond strength of rubber to metal components with a double shear cylindrical specimen. Large triangular pry slots are located at the corners, opposite the cam-action hinges. The durable, hard astmm finish resists the corrosive and adhesive effects of most compounds, greatly improving overall durability and ease of maintenance.
It is important to review ASTM D in order to fully understand the test setup, procedure, and results requirements. Results are obtained by measuring the pull load necessary to separate a rubber strip from a metal surface at a 90 degree angle.
Maintaining unidirectional force throughout the process of peeling from a substrate. CCSi UltraLife molds are designed, engineered, and manufactured to produce high ast, specimens, over an extended service life!
Loads as high at 10, pounds can be common. Works very well with flat, thin specimens Eccentric design increases gripping force with tension. A shear test is done until a break occurs at a depth of 5 mm at the rubber-metal bond interface. The upper and lower parts of the specimen are metal cones with slots or threads for connecting to the tensile test machine.
As force is applied in one direction the material shrinks in the orthogonal direction. XyLive is the best choice to enable the test engineer to visually monitor the progress of the test vs the data on the computer screen. This will help avoid slipping in the test.
ASTM D – 08 Standard Test Methods for Rubber Property—Adhesion to Rigid Substrates
To prepare the specimens for Method D, 6 rubber pucks are mounted in an assembly with a clamp to hold compressive force. The standard calls out several test asttm related to rubber adhesion strength; however, Methods A and B are the most common.
Optional finishes and cavity coatings are available. The data obtained indicate the strength of adhesion along a line across the width of the rubber strip being separated from a metal plate at a 90 degree angle. Mount the vulcanized standard test specimen in the c429 testing machine using care in centering and adjustment so that the tension shall be uniformly distributed. The results are obtained by measuring the force necessary to separate a rubber from a metal surface.
Method B of ASTM D is intended to determine the adhesive d249 of rubber to metal bonding agents by 90 degree peel strip test. Vulcanizing is consists of a chemical reaction with sulfur s429 heating which improves the mechanical properties of rubber. This ensures that the line of tensile force remains concentric with the grip body.
The test machine should be equipped with swivel joints above and below to ensure uniformly distributed tensile force tensile force through the specimen assembly.
Screw side-action grips provide a very simple and efficient method for holding test specimens in a wide range of applications. Peel force is indicated in pounds per square inch of length of the peel line. Pneumatic grips also provide constant clamping force throughout the test to avoid specimen slippage. The challenges of testing to this standard are: The strip is volcanized to a piece of metal which is 1.
The sample also lends itself to testing the effectiveness of different processing techniques and various adhesive systems. Slippage in grips will be a big challenge in testing rubber coating of metal because coating adhesion must be strong but rubber material necks down, also called Poisson effect.