Because the oil content of polypropylene staple fibers obtained by the hot extraction method cannot reflect the actual oil content of the fibers, and ether has a narcotic hazard, a cold extraction method using acetone as an extractant is used.

According to several years of production practice, it is known that the concentration of the front and rear spinning oils has a great influence on the oil content of polypropylene staple fibers. The concentration of the rear spinning oils has a slightly greater effect, and whether the rotation speed of the oiling roller is in line with the rotation speed of the metering pump Matching also has a great impact on the oil content of the fiber.

In actual production, we should always pay attention to the impact of changes in front spinning, ambient temperature, and heat setting process, and adjust the process parameters in time to ensure the stability of the polypropylene staple fiber oil content.