The problems and solutions in the large-scale production of polypropylene staple fiber are:

1. There will be many defects in the early stage of production, which can be solved gradually by adjusting the ring blowing cooling process parameters.

2. The auxiliary materials cannot be added at one time, but need to be mixed before spinning.

3. Judging from the test indicators of the polypropylene staple fiber produced for the first time, the breaking elongation of the modified fiber is too large, and the strength is low. This is caused by the addition of the modified component and is also related to the unreasonable spinning process. Excessive elongation affects yarn quality, so it should be carefully controlled in terms of spinning technology.

4. From the perspective of post-spinning processing, there are no problems such as entanglement of cylinders, difficulty in carding, and traffic jams, indicating that polypropylene staple fiber crimp number, antistatic properties and other indicators are reasonable. In addition, from the point of view of post-processing and spinning, it is also feasible to use lower oil content than conventional spinning or simply to eliminate static electricity in spinning and use its dyeability to appropriately reduce the addition of antistatic components.

5. In the finishing process of antistatic and dyeable polypropylene staple fiber, boiling dyeing is appropriate to avoid high temperature treatment. After dyeing, the dyeing fastness of polypropylene staple fiber will be greatly improved after certain treatment.