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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 31, Number 9
BKCSDE 31(9)
September 20, 2010 

Particle Dispersibility Improvement of Polyester Fibers with a New Line Injection
Seong Yoon Park, Hak Yong Kim*, Fan Long Jin, Soo Jin Park*
Line injection system, Polyethylene terephthalate, Fiber, Dispersibility, TiO2
In order to develop a new line injection system for spin draw yarn (FD SDY) fibers, the effect of various parameters in extrusion and melt line conditions on the dispersion and distribution of TiO2 particles within FD PET fibers was investigated. As a result, the dispersibility of TiO2 particles in a PET matrix is found to depend on the particle size and its surface characteristics. Surface modification of TiO2 by dimethyl polysiloxane resulted in the improved dispersibility and affinity of TiO2 particles in the PET matrix. Especially, residence time, mixing temperature, and mixing shear rate in the new line injection system under the SDY spinning process were very important parameters to minimize the agglomeration of TiO2 particles. The FD SDY prepared by the new line injection system was superior to those using the polymerization process and the conventional masterbatch chip dosing process in the color-L and color-b values of the fibers.
2637 - 2643
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