| 摘要 |
The process for preparing delustered filaments and fibers is carried out by adding an amount of delustrant in a ratio of 5 to 20 parts by weight of delustrant per 100 parts of polymer chips under an inert blanket, grinding said delustrant with said polymer chips with grinding balls of about one-half to 11/4 inches in diameter by vibrating at about 2 to 10 mm amplitude and at a frequency of about 600 to 3,600 cycles per minute while incrementally increasing the temperature from about ambient to about 20 DEG C. below the softening point of said polymer and obtaining a pigment dispersion of substantially less than 1 micron particle size and separating the balls from the pigmented polymer.
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