08-09-2010 дата публикации
Номер: CN0101824666A
Принадлежит:
The invention relates to a production method of polyster fiber, which can be used for producing polyster fiber with the thermal shrinkage of over 50 percent and low cost. The production method of polyster fiber comprises the steps of: drying a PET raw material until the water content is below 120ppm and fusing and extruding by a screw; spraying spinning yarns by a spinneret and coiling to obtain primary yearns; balancing, and then stretching, coiling and carrying out slack hot setting to obtain the polyster fiber, wherein the temperature of the fused and extruded melt is 275-285 DEG C, the melt viscosity is 0.52-0.58dl/g, the annular air blowing temperature of the spinning yarns is 15-20 DEG C, the wind speed is 0.8-1.2m/s, the temperature of a yarn chamber is 25-30 DEG C, the stretching ratio of a spinning jet is 140-148 times, the density of the spun primary yarns is 9-10dtex, the stretching temperature is 25-35 DEG C, the stretching ratio is 2.6-3.2, the slack hot setting temperature ...
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