Abstract: There are some wool fibers drilling out of the winter coat filled with wool during wearing process. The more obvious one is coming from sewing needles, and the capability of beauty and wearing are debased. The fabrics-testing method for anti-penetration capability of feather and down ( GB / T12705—2009) was referred, and the tested parameter was adjusted. simulating all kinds of extrusion, knead, collision force of the wool winter coat during wearing process, the quantities of wool fibers drilling out were counted, and the disciplinarian distributing of wool fibers drilling out based on different fabric density and sewing needles were analyzed .The result shows that using smaller and round shape sewing needle is an effective way to reduce the quantities of wool fibers drilling out. This technique method can be used in the manufacture practice and advance the anti-penetration capability of winter coat filled with wool.

Key words: winter woolen garment, quantity of projecting-out fiber, sewing needle, needle gauge, needlepoint shape