Contact heat resistance (HRO)

Objective

This test verifies the sole's resistance to contact heat, so as not to burn the foot.

Principle

A rectangular test piece is taken from the tread.
An iron is heated to 300°C.
The iron is applied to the specimen under a pressure of 20 kPa for one minute.
After resting for ten minutes, the specimen is bent around a mandrel to check for cracks.
The specimen must neither melt during the test nor crack when flexed around the mandrel.

Type: Physical and mechanical test
Standards: EN ISO 20344 §8.9 / EN ISO 20345 §6.4.1
Product: Footwear
Criterias: Mechanical risk / PEE
Component: Outsole