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

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 short fiber produced for the first time, the breaking elongation of the modified fiber is too large and the strength is low. This is due to the addition of the modified component, and it is also related to the unreasonable spinning process. Excessive length rate affects yarn quality, so it should be carefully controlled in terms of spinning technology.

4. From the point of view of post-spinning processing, there are no problems such as entanglement of cylinders, difficulty in carding, and traffic jams, indicating that the short 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.

Polypropylene staple fiber is made from polypropylene as a raw material through processes such as melting, drawing, spinning, and cutting. In the process of making polypropylene staple fiber, functional masterbatch, such as anti-aging masterbatch, flame retardant masterbatch, etc. can be added as needed to increase the performance of polypropylene staple fiber. Polypropylene staple fiber for felt is a polypropylene staple fiber specially used to make felt and used for filter material.

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