Abstract: Targeting at the fiber projecting – out phenomena in winter woolen garments ,through orthogonal test ,according to “fabric test method for fiber projecting – out resistance of feather and down” (GB/T 12705—2009),this paper test the quantity of projecting – out fiber under different sewing conditions .With the SPSS software, using the single factor statistics and analytical calculation to obtain optimized process parameters of the combination, and discussed the influences of each sewing condition on the stitch drill wool quantity. The result indicated: as to the winter woolen garments, using 9 round head sewing needle, sewing line's density of 14.8tex × 3, the stitch density for 9 pin / 3 cm is the optimal combination for the sewing parameters; sewing needle gauge and sewing line's density on the stitch drill wool quantity is quite significant and have about the same level of effect, but the stitch density’s effect to be small.

Key words: winter coat filled with wool, ququantity of wool penetrating out, needle size, sewingline's linear density, stitch density, orthogonal experiment