抄録
Surface wettabilities of acrylic fibers were measured after heat treatments at various temperatures and conditions. Assessment of fiber's wettability is made by an immersional wetting method, a modification of Hydrometer method. In our method, the weight of sample fiber assembly is measured in distilled water as a function of time elapsed. As sample weight changes with the replacement of air by the liquid, immersional wetting properties of fiber are deduced from the weight measurement.
Results are as follows. Initial velocities of immersional wetting increased extremely for wet heated fibers. This fact indicates that the wettability of the fiber was greatly improved. On the contrary, wettabilities of acrylic fiber decreased with the dry heating temperature. But the decreasing behavior was not simple: Wettability increased for 130-190°G heating, but decreased for the heating over this temperature region. It was inferred that behaviours of heat treated fibers were concerned with the states of AN groups in acrylic fiber.
