Abstract
Nonwoven fabric composed of polyolefin fiber was treated to improve wettability by plasma produced in
pores between fibers in it. Measurement of water soaking rate for discharge energies measured by lissajous figure
repealed energy effect of surface modification was relatively high. This high effectiveness of modification was
considered that the plasma region was restricted closed to fiber surface. Additionally, it was pointed that the magnitude
of applied voltage was important to modify the hydrophobic surface into hydrophilic one homogeneously. ESCA
measurement repealed the progress of wettability was caused by implantation of functional group including oxgen atom.
The durability of hydrophilicity up to 100 centigrade was relatively high. The large extinguishment of hydrophilicity at
high temperature was caused by movement of molecules by melt. In contrast, remaining of high O/C ratio and chemical
shift of C1s spectra observed with ESCA suggested that turning functional groups into polymer bulk occurred.
