Fiber-to-fiber frictional property is one of the most important factor in the drafting analysis. Experiments have been made at the temperature ranging from 20-100°C, to determine the frictional force applied on an acrylic filament pulled out from the paralleled fiber bundle of cotton, viscose rayon, or polyester fibers. The following results have been obtained :
(1) The degree of influence of temperature on the frictional force applied on a fiber pulled out paralleled fiber bundle varies according to the kinds of fibers. Although pulling out friction frome cotton fiber bundle is reduced to a minimum at 80°C, that of viscose rayon or polyester fiber bundle reaches a maximum at 80°C.
(2) Pulling out frictional force from fiber bundles, f
s (g/cm), is calculated by the equation :
f
s=K
0P
αwhere, P (g/cm
2) is the external force applied on the paralleled fiber bundle, K
0 and α are experimental constants, which are affected by the kinds of fiber, temperature, and compressive properties of fiber bundle.
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