ASTM D624 and ISO 34-1 are similar tear strength test methods for rubber test samples. The test results in the measurement of a materials resistance to tearing. Tear strength can also be used to monitor material anisotropy of a material. ASTM D624 and ISO 34-1 both define tear strength as the measurement of force required to tear a test sample divided by specimen thickness. Testing is performed by pulling specimens apart using a universal test machine equipped with tensile testing grips. An application engineer can assist in the selection of the best grip and jaw face for rubber tests. Pneumatic air grips with serrated or rubber coated faces are common. A constant gripping force can prevent specimen slippage when specimens elongate. Self-tightening grips, such as roller grips, are also adequate for rubber tests.
Applicable Testing Standards
- ISO 34-1 & ISO 34-2 Tear Strength of Rubber, Vulcanized or Thermoplastic - Trouser
- ASTM D624 Tear Testing for Rubber and Elastomers
Recommended Test Machine
Forces up to 10 kN (2,250 lbf)
Low force tabletop systems
Modular series of five frame options with adjustable test space
Affordable testing option for tension, compression, bend, peel and much more
Forces up to 5 kN (1,125 lbf)
Low force tabletop systems
Tests at speeds up to 2,500 mm/min (100 in/min)
Best for high travel or high elongation test requirements
Force range of 5 kN to 600 kN (1,125 lbf to 135,000 lbf)
Adjustable test space
The most popular choice for static tension and compression tests
These dual column testers are available in both tabletop and floor standing models
Recommended Testing Accessories
Load ratings from 1 kN to 10 kN (225 lbf to 2,250 lbf)
Maximum specimen thicknesses of 7 mm or 8 mm (0.28 in. or 0.31 in.)
Works very well with flat, thin specimens
Eccentric design increases gripping force with tension
Rated to 500 N (112 lbf)
Maximum specimen thickness of 6 mm (0.23 in)
Pneumatic design allows for quick specimen setup
Consistant clamping force between tests
Standard temperature range of -155°C to 620°C (-247°F to 1150°F)
Accompanied by a broad set of accessories that are capable of withstanding the heat or cold
PID controlled internal temperature
Mounts directly to the test frame