International Standards Tear Resistance:
ASTM D 624 - DIN 53 507 (withdrawn) - DIN 53 515 (withdrawn) - DIN ISO 34-1 - ISO 34-1 - ISO 34-2 - JIS K 6252-1 - JIS K 6252-2 - VDA 675 210 (withdrawn) - 675 211 (withdrawn) - a.o.
For tear propagation resistance, our laboratory has the following punching gauges for a wide range of specimens, as well as 3 universal testing machines. Our temperature chamber also allows us to measure tear resistance in a temperature range from -30°C to +150°C:
- Strip specimen (harness specimen), 2 mm and 6 mm
- Angle Test Piece with and without nick
- Crescend Test Piece with and without nick
- Small (Delft) Test Piece
Since the quality and the actual incision depth of the specimens have a considerable influence on the precision of the measurement, we use punching knives with adjustable incision depth for the angle specimen and the crescent specimen. Hereby we guarantee an exact and standard-compliant incision depth for materials from very low to high hardness ranges, according to the most different requirements and standards.
Tear resistance describes the ability of elastomers to counteract progressive crack formation. For this purpose, a standardized specimen with a defined crack initiation, i.e. an artificially introduced defect (indentation) of defined geometry, is placed under tensile load. The energy required to extend the crack by a certain length is measured and specified as tear propagation resistance.
The tear propagation resistance provides information about the material's resistance to crack propagation and is decisive for applications in which mechanical loads and deformations occur.
