Bending resistance

Objective

This method is used to evaluate the repeated flex resistance of elastomer outsoles

Principle

The test consists of subjecting a sole to 30,000 flexes, in the flexing zone of the forepart, on a special device known as
the Bennewart. A 2 mm notch is pre-cut, and its evolution is noted, as is any spontaneous appearance of deterioration.
The result corresponds to the propagation of the notch after 30,000 flexes, expressed in mm.

Type: Physical and mechanical test
Standards: EN ISO 20344 §8.5 / EN ISO 20344 §8.6 / EN ISO 20345 §5.8.5
Product: Footwear
Criterias: Mechanical risk / PEE
Component: Outsole