Abstract
The relationship between the geometrical structures of plain-woven filament fabrics and the directional effect of fabric-on-fabric static friction has been investigated with the following results:
(1) For every relative direction of rubbing, frictional force F per unit area is related to pressure N by the relation F=kNn, where k and n are constants. (The high values of k will discussed on a future occasion.)
(2) The term “coefficient of the directional effect of fabric-on-fabric friction” has been introduced to give a quantitative significance by defining it as
δ =(μff-μww)/(μff+μww)
where μff and μww are the friction coefficients of relative directions :-“filling-along-filling” and “warp -along-warp, ” respectively. Their values δ which have been obtained from experimental results show the same tendencies as those obtainable by cloth geometrical calculations .
(3) The structure of the higher crown of warp or filling has a marked effect upon the anisotropy of the friction of a given fabric.
