| 摘要 |
A polyolefin fiber includes 0.2 to 5.0 wt % of hydrophilic additive, and 0.05 to 3.00 wt % of titanium dioxide (TiO2). The polyolefin fiber may further include 0.2 to 1.0 wt % of spin finish provided on a surface thereof. The polyolefin fiber is spun to have a circular section, a modified cross-section including an X-shaped section, a Y-shaped section, a deltaic section, an oval section, a diamond section, a bladebone-shaped section, and a combined section thereof, or a combined section of the circular section and the modified cross-section. A method of producing a polyolefin fiber includes (a) melt extruding a composition which contains 93 to 99 wt % of polyolefin resin, 0.2 to 5.0 wt % of hydrophilic additive, and 0.05 to 3.00 wt % of any one titanium dioxide (TiO2) of rutile titanium dioxide, anatase titanium dioxide, and brookite titanium dioxide at 240 to 300° C. and performing winding at a spin speed of 500 to 2,000 mpm to produce a undrawn yarn, and (b) drawing the undrawn yarn at a draw ratio of 1.0 to 5.0, crimping the drawn yarn to 5.5 to 9.0 ea/cm by using a crimper, attaching 0.2 to 1.0 wt % of spin finish to a surface of the fiber by spraying or dipping, heat setting the spin finish at 100 to 130° C. for 3 to 10 min, and cutting the resulting polyolefin fiber to predetermined lengths. A method of producing a polyolefin fiber includes melt extruding a composition which contains 93 to 99 wt % of polyolefin resin, 0.2 to 5.0 wt % of hydrophilic additive, and 0.05 to 3.00 wt % of any one titanium dioxide (TiO2) of rutile titanium dioxide, anatase titanium dioxide, and brookite titanium dioxide at 230 to 270° C., winding at a spin speed of 40 to 300 mpm to produce a undrawn yarn, drawing the undrawn yarn at a draw ratio of 1.0 to 5.0, crimping the drawn yarn to 5.5 to 9.0 ea/cm by using a crimper, attaching 0.2 to 1.0 wt % of spin finish to a surface of the fiber by spraying or dipping, heat setting the spin finish at 100 to 130° C. for 3 to 10 min, and cutting the resulting spin finish to predetermined lengths. The polyolefin fiber has desirable maintenance of hydrophilicity and whiteness after rinsing is performed by using water and low foaming property and excellent carding workability required to produce non-woven fabrics (particularly, spunlace non-woven fabrics). The polyolefin fiber improves clearness of point and embossing patterns during thermal point bonding and thermal embossing processes.
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