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Testing Rubber to Materials Standards
Testing Rubber to Materials Standards
Testing Rubber to Materials Standards
Solution
- Software-controlled universal testing machine (UTM).
- Comprehensive understanding of raw material properties for accurate component evaluation.
Self-tightening roller grips for reliable specimen holding.
Benefits
- Precise adherence to international test standards.
- Flexibility to assess mechanical and ergonomic characteristics.
- Capability to perform tests under varied environmental conditions with appropriate accessories.
Rubber and thermoplastic elastomer testing can assess the elasticity, tensile strength, elongation, and stress behavior of rubber materials, including tires, seals, dampers, footwear, and toys for manufacturers. Several tests are typically performed, ASTM D412 and ISO 37, on universal testing machines with software control. The contact arm extensometry is available on Presto Stantest's Zeus Ultimo 3.0 UTM, making it ideal for accurate measurement of tensile and compression loads for elastomer materials. In order to reduce damage to the specimen and to fix and maintain the specimen holding during the test, self-tightening roller grips are used. Key mechanical properties are measured, and extension rates (according to standards) are controlled; detailed reports are also provided with graphs, specimen information, calculated data, and information about the conditions of the tests.
Requirement
Characterization of materials is essential to make sure that one is confident in the functioning of manufactured components and products. Both internal and external mainly specialized laboratories, conduct tests on samples in order to measure quality, test performance, or assess whether they are suitable for new operations. TPE-vulcanized and thermoplastic elastomers are in high demand in car tires, seals, and dampers, and in consumer products such as footwear and toys. The first attribute of suitability to such applications is their elasticity.
Two common standards that are used to measure the elastomer include ISO 37 and ASTM D412:
-> ISO 37, Rubber-vulcanized or thermoplastic: Determination of tensile stress-strain properties, which measures the following:
- Tensile strength (TS)
- Break tensile strength (TSb)
- Elongation at break (Eb)
- Stress at a given elongation (Se)
- Elongation at a given stress (Es)
- Stress at yield (Sy)
- Elongation at yield (Ey)
-> ASTM D412 – Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers: Tension, determining
- Tensile strength
- Tensile stress at a specified elongation
- Yield stress
Both standards reference additional protocols for specimen preparation, conditioning, and environmental factors.
Solution
Universal Testing Machines enable precise measurement of tensile and compression properties across elastomer specimens. Interchangeable fixtures and software-controlled instrumentation provide accurate gripping and data capture. Presto Stantest utilizes Zeus Ultimo 3.0 UTM systems with software and contact-arm extensometry for elastomer testing.
Dumbbell-shaped specimens are standard, though O-ring samples are also permissible. Specimen dimensions and orientation relative to the material grain are carefully selected to ensure representative results. Eccentric roller grips, sized to cover the entire width of the dumbbell shoulders, automatically self-tighten to avoid “shoulder breaks.”
Software controls the rate of extension as defined in the standards, while the extensometer accurately records gauge length strain, allowing stress calculations. Users can derive properties such as stress at specific elongation points (e.g., 25%, 200%) and generate complete test reports.
Software also offers a drag-and-drop interface for report creation, enabling the inclusion of sample attributes—description, preparation, thickness, and grain orientation—alongside graphs and calculated results for fully documented procedures.
Test Equipment
- Zeus Ultimo 3.0 single-column UTM
- VectorPro control software
- Contact-arm extensometer
- Self-tightening roller grips
- Rubber dumbbell or O-ring specimens
Test standards
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