抄録
This article concerns a theoretical analysis of the effects of drafting on the fiber orientation of ideal slivers. The assumptions made in it are that ideal slivers are filled perfectly with the medium; that all fibers can be folded at the interlocking points of segments; and that the directional distributions of segments are fixed by the deformation of the medium.
The authors have formulated a function to expresses the effects which changes in the length and volume of ideal slivers have on fiber oriettation. The results of this analysis make it possible to explain some empirical facts, such as:
(1) That the directional distributions of segments in slivers follow the normal or the peaked distribution, depending on whether draft ratios are small or large.
(2) That the degrees of fiber orientaion of slivers increases gradually, but the rate of increase gets gradually smaller as the draft ratio increases.
This theory can be used to estimate the effects of draft ratios on the fiber orientation of slivers as the value of draft efficiency.
