How to reduce the production of PP FDY yarns in the production process?

In the case of very high spinning speed and cooling rate, due to the concentration of stress, the skin layer is subjected to greater tension, and the skin layer of PP FDY yarn is prone to cracks and lead to wool. Therefore, choosing excellent cooling conditions to maintain uniform radial structure It seems very important.

The successful approach is to establish an effective slow cooling zone and use a honeycomb-shaped side blowing device to generate advection air and achieve good cooling of the melt stream. In the stretching process, as the processing speed (that is, the second hot roll speed) increases, the output increases proportionally, the production cost decreases, and the dyeing uniformity improves. However, when the processing speed is too high, the product breakage and wool will increase, so it is necessary to weigh and determine the appropriate processing speed.

If the tension is not enough and the tension is low, the shaking amplitude of the thread will increase, which will also cause hair and breakage, but too high tension will have a negative effect on the forming and unwinding of the thread cake.

In terms of the relationship between the adhesion of the oil agent and the fluffing of the fiber, maintaining a higher concentration of the oil emulsion and the oil content of the silk can reduce the filaments of the PP FDY yarns, but also prevent the concentration of the oil agent from being too high. This leads to a decrease in oil permeability and lower silk quality.

Ningbo Dazhong Chemical Fiber Industrial Co., Ltd. has long-term production and operation: polypropylene yarn, polypropylene filament, PP FDY yarns, polyester staple fiber, polypropylene full-drawn yarn, polypropylene POY yarn.