ISO 20344 Personal Protective Equipment — Test Methods for Footwear

ISO 20344 specifies methods for testing footwear designed as personal protective equipment

Apparatus

Tensile machine, with a means of continuously recording load, with a jaw separation rate of (100 ± 20) mm/min and a force range of 0 N to 600 N.

The machine shall be fitted with either pincers or flat jaws (depending on the construction of the test sample), (27,5 ± 2,5) mm wide, capable of firmly

gripping the test pieces.

Measurement of Bond Strength

Before carrying out the test, measure the width of the test piece to the nearest mm at several points using a calibrated steel rule and calculate the average value

to the nearest mm.

Then measure the bond strength on a minimum length of 30 mm in one of the following ways.

— For sole/upper bond strength (construction type a): Clamp the test piece into the jaws of the tensile machine, using a pincer jaw to grip the short edge of the sole,

and record the load/deformation graph at a jaw separation speed of (100 ± 20) mm/min.

— For sole/upper bond strength (construction types b, c, d and e) and sole interlayer bond strength (construction types f and g): Clamp the separated ends of the

test piece in the flat jaws and record the load/deformation graph at a jaw separation speed of (100 ± 20) mm/min.

*** Before conducting ISO 20344 , it is important to read the entire specification. Standards can be obtained from appropriate standard authorities.