Wear Tester For Shoe Lace
The resistance of Shoe Laces to wear and tear due to abrasion while tying is determined by abrading two samples of the lace against each other under a specified tension and finding the number of rubs which cause one of the laces to wear off till it breaks into two. One of the laces used in the test is formed into a loop and suspended from a pin in a vertical plane. One end of the second laces is held in a rotating grip. The lace is passed through the loop of the first lace and a specified dead weight suspended from its free and to keep both the loops under tension. The movement of the grip causes rubbing action between the two laces, which continues till one of them fails. The number of rubs needed to cause failure gives a measure of the resistance of the lace to wear. Wearing of lace against eye let can also be evaluated.
SATRAPM154 – 1992:Physical Test Method for Shoe Lace to Shoe Lace and Shoe Lace to Lace Carrier Abrasion.